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
  24         /**
  25          * Status: Article successfully updated
  26          */
  27         const AS_SUCCESS_UPDATE            = 200;
  28
  29         /**
  30          * Status: Article successfully created
  31          */
  32         const AS_SUCCESS_NEW_ARTICLE       = 201;
  33
  34         /**
  35          * Status: Article update aborted by a hook function
  36          */
  37         const AS_HOOK_ERROR                = 210;
  38
  39         /**
  40          * Status: The filter function set in $wgFilterCallback returned true (= block it)
  41          */
  42         const AS_FILTERING                 = 211;
  43
  44         /**
  45          * Status: A hook function returned an error
  46          */
  47         const AS_HOOK_ERROR_EXPECTED       = 212;
  48
  49         /**
  50          * Status: User is blocked from editting this page
  51          */
  52         const AS_BLOCKED_PAGE_FOR_USER     = 215;
  53
  54         /**
  55          * Status: Content too big (> $wgMaxArticleSize)
  56          */
  57         const AS_CONTENT_TOO_BIG           = 216;
  58
  59         /**
  60          * Status: User cannot edit? (not used)
  61          */
  62         const AS_USER_CANNOT_EDIT          = 217;
  63
  64         /**
  65          * Status: this anonymous user is not allowed to edit this page
  66          */
  67         const AS_READ_ONLY_PAGE_ANON       = 218;
  68
  69         /**
  70          * Status: this logged in user is not allowed to edit this page
  71          */
  72         const AS_READ_ONLY_PAGE_LOGGED     = 219;
  73
  74         /**
  75          * Status: wiki is in readonly mode (wfReadOnly() == true)
  76          */
  77         const AS_READ_ONLY_PAGE            = 220;
  78
  79         /**
  80          * Status: rate limiter for action 'edit' was tripped
  81          */
  82         const AS_RATE_LIMITED              = 221;
  83
  84         /**
  85          * Status: article was deleted while editting and param wpRecreate == false or form
  86          * was not posted
  87          */
  88         const AS_ARTICLE_WAS_DELETED       = 222;
  89
  90         /**
  91          * Status: user tried to create this page, but is not allowed to do that
  92          * ( Title->usercan('create') == false )
  93          */
  94         const AS_NO_CREATE_PERMISSION      = 223;
  95
  96         /**
  97          * Status: user tried to create a blank page
  98          */
  99         const AS_BLANK_ARTICLE             = 224;
 100
 101         /**
 102          * Status: (non-resolvable) edit conflict
 103          */
 104         const AS_CONFLICT_DETECTED         = 225;
 105
 106         /**
 107          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 108          * editting in his own userspace or talkspace and wpIgnoreBlankSummary == false
 109          */
 110         const AS_SUMMARY_NEEDED            = 226;
 111
 112         /**
 113          * Status: user tried to create a new section without content
 114          */
 115         const AS_TEXTBOX_EMPTY             = 228;
 116
 117         /**
 118          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 119          */
 120         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 121
 122         /**
 123          * not used
 124          */
 125         const AS_OK                        = 230;
 126
 127         /**
 128          * Status: WikiPage::doEdit() was unsuccessfull
 129          */
 130         const AS_END                       = 231;
 131
 132         /**
 133          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 134          */
 135         const AS_SPAM_ERROR                = 232;
 136
 137         /**
 138          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 139          */
 140         const AS_IMAGE_REDIRECT_ANON       = 233;
 141
 142         /**
 143          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 144          */
 145         const AS_IMAGE_REDIRECT_LOGGED     = 234;
 146
 147         /**
 148          * Status: can't parse content
 149          */
 150         const AS_PARSE_ERROR                = 240;
 151
 152         /**
 153          * @var Article
 154          */
 155         var $mArticle;
 156
 157         /**
 158          * @var Title
 159          */
 160         var $mTitle;
 161         private $mContextTitle = null;
 162         var $action = 'submit';
 163         var $isConflict = false;
 164         var $isCssJsSubpage = false;
 165         var $isCssSubpage = false;
 166         var $isJsSubpage = false;
 167         var $isWrongCaseCssJsPage = false;
 168         var $isNew = false; // new page or new section
 169         var $deletedSinceEdit;
 170         var $formtype;
 171         var $firsttime;
 172         var $lastDelete;
 173         var $mTokenOk = false;
 174         var $mTokenOkExceptSuffix = false;
 175         var $mTriedSave = false;
 176         var $incompleteForm = false;
 177         var $tooBig = false;
 178         var $kblength = false;
 179         var $missingComment = false;
 180         var $missingSummary = false;
 181         var $allowBlankSummary = false;
 182         var $autoSumm = '';
 183         var $hookError = '';
 184         #var $mPreviewTemplates;
 185
 186         /**
 187          * @var ParserOutput
 188          */
 189         var $mParserOutput;
 190
 191         var $mBaseRevision = false;
 192         var $mShowSummaryField = true;
 193
 194         # Form values
 195         var $save = false, $preview = false, $diff = false;
 196         var $minoredit = false, $watchthis = false, $recreate = false;
 197         var $textbox1 = '', $textbox2 = '', $summary = '', $nosummary = false;
 198         var $edittime = '', $section = '', $sectiontitle = '', $starttime = '';
 199         var $oldid = 0, $editintro = '', $scrolltop = null, $bot = true;
 200         var $content_model = null, $content_format = null;
 201
 202         # Placeholders for text injection by hooks (must be HTML)
 203         # extensions should take care to _append_ to the present value
 204         public $editFormPageTop = ''; // Before even the preview
 205         public $editFormTextTop = '';
 206         public $editFormTextBeforeContent = '';
 207         public $editFormTextAfterWarn = '';
 208         public $editFormTextAfterTools = '';
 209         public $editFormTextBottom = '';
 210         public $editFormTextAfterContent = '';
 211         public $previewTextAfterContent = '';
 212         public $mPreloadContent = null;
 213
 214         /* $didSave should be set to true whenever an article was succesfully altered. */
 215         public $didSave = false;
 216         public $undidRev = 0;
 217
 218         public $suppressIntro = false;
 219
 220         /**
 221          * @param $article Article
 222          */
 223         public function __construct( Article $article ) {
 224                 $this->mArticle = $article;
 225                 $this->mTitle = $article->getTitle();
 226
 227                 $this->content_model = $this->mTitle->getContentModelName();
 228
 229                 $handler = ContentHandler::getForModelName( $this->content_model );
 230                 $this->content_format = $handler->getDefaultFormat(); #NOTE: should be overridden by format of actual revision
 231         }
 232
 233         /**
 234          * @return Article
 235          */
 236         public function getArticle() {
 237                 return $this->mArticle;
 238         }
 239
 240         /**
 241          * @since 1.19
 242          * @return Title
 243          */
 244         public function getTitle() {
 245                 return $this->mTitle;
 246         }
 247
 248         /**
 249          * Set the context Title object
 250          *
 251          * @param $title Title object or null
 252          */
 253         public function setContextTitle( $title ) {
 254                 $this->mContextTitle = $title;
 255         }
 256
 257         /**
 258          * Get the context title object.
 259          * If not set, $wgTitle will be returned. This behavior might changed in
 260          * the future to return $this->mTitle instead.
 261          *
 262          * @return Title object
 263          */
 264         public function getContextTitle() {
 265                 if ( is_null( $this->mContextTitle ) ) {
 266                         global $wgTitle;
 267                         return $wgTitle;
 268                 } else {
 269                         return $this->mContextTitle;
 270                 }
 271         }
 272
 273         function submit() {
 274                 $this->edit();
 275         }
 276
 277         /**
 278          * This is the function that gets called for "action=edit". It
 279          * sets up various member variables, then passes execution to
 280          * another function, usually showEditForm()
 281          *
 282          * The edit form is self-submitting, so that when things like
 283          * preview and edit conflicts occur, we get the same form back
 284          * with the extra stuff added.  Only when the final submission
 285          * is made and all is well do we actually save and redirect to
 286          * the newly-edited page.
 287          */
 288         function edit() {
 289                 global $wgOut, $wgRequest, $wgUser;
 290                 // Allow extensions to modify/prevent this form or submission
 291                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 292                         return;
 293                 }
 294
 295                 wfProfileIn( __METHOD__ );
 296                 wfDebug( __METHOD__.": enter\n" );
 297
 298                 // If they used redlink=1 and the page exists, redirect to the main article
 299                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 300                         $wgOut->redirect( $this->mTitle->getFullURL() );
 301                         wfProfileOut( __METHOD__ );
 302                         return;
 303                 }
 304
 305                 $this->importFormData( $wgRequest );
 306                 $this->firsttime = false;
 307
 308                 if ( $this->live ) {
 309                         $this->livePreview();
 310                         wfProfileOut( __METHOD__ );
 311                         return;
 312                 }
 313
 314                 if ( wfReadOnly() && $this->save ) {
 315                         // Force preview
 316                         $this->save = false;
 317                         $this->preview = true;
 318                 }
 319
 320                 if ( $this->save ) {
 321                         $this->formtype = 'save';
 322                 } elseif ( $this->preview ) {
 323                         $this->formtype = 'preview';
 324                 } elseif ( $this->diff ) {
 325                         $this->formtype = 'diff';
 326                 } else { # First time through
 327                         $this->firsttime = true;
 328                         if ( $this->previewOnOpen() ) {
 329                                 $this->formtype = 'preview';
 330                         } else {
 331                                 $this->formtype = 'initial';
 332                         }
 333                 }
 334
 335                 $permErrors = $this->getEditPermissionErrors();
 336                 if ( $permErrors ) {
 337                         wfDebug( __METHOD__ . ": User can't edit\n" );
 338                         // Auto-block user's IP if the account was "hard" blocked
 339                         $wgUser->spreadAnyEditBlock();
 340
 341                         $this->displayPermissionsError( $permErrors );
 342
 343                         wfProfileOut( __METHOD__ );
 344                         return;
 345                 }
 346
 347                 wfProfileIn( __METHOD__."-business-end" );
 348
 349                 $this->isConflict = false;
 350                 // css / js subpages of user pages get a special treatment
 351                 $this->isCssJsSubpage       = $this->mTitle->isCssJsSubpage();
 352                 $this->isCssSubpage         = $this->mTitle->isCssSubpage();
 353                 $this->isJsSubpage          = $this->mTitle->isJsSubpage();
 354                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 355                 $this->isNew                = !$this->mTitle->exists() || $this->section == 'new';
 356
 357                 # Show applicable editing introductions
 358                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 359                         $this->showIntro();
 360                 }
 361
 362                 # Attempt submission here.  This will check for edit conflicts,
 363                 # and redundantly check for locked database, blocked IPs, etc.
 364                 # that edit() already checked just in case someone tries to sneak
 365                 # in the back door with a hand-edited submission URL.
 366
 367                 if ( 'save' == $this->formtype ) {
 368                         if ( !$this->attemptSave() ) {
 369                                 wfProfileOut( __METHOD__."-business-end" );
 370                                 wfProfileOut( __METHOD__ );
 371                                 return;
 372                         }
 373                 }
 374
 375                 # First time through: get contents, set time for conflict
 376                 # checking, etc.
 377                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 378                         if ( $this->initialiseForm() === false ) {
 379                                 $this->noSuchSectionPage();
 380                                 wfProfileOut( __METHOD__."-business-end" );
 381                                 wfProfileOut( __METHOD__ );
 382                                 return;
 383                         }
 384                         if ( !$this->mTitle->getArticleId() )
 385                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 386                         else
 387                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 388                 }
 389
 390                 $this->showEditForm();
 391                 wfProfileOut( __METHOD__."-business-end" );
 392                 wfProfileOut( __METHOD__ );
 393         }
 394
 395         /**
 396          * @return array
 397          */
 398         protected function getEditPermissionErrors() {
 399                 global $wgUser;
 400                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 401                 # Can this title be created?
 402                 if ( !$this->mTitle->exists() ) {
 403                         $permErrors = array_merge( $permErrors,
 404                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 405                 }
 406                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 407                 $remove = array();
 408                 foreach( $permErrors as $error ) {
 409                         if ( ( $this->preview || $this->diff ) &&
 410                                 ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' ) )
 411                         {
 412                                 $remove[] = $error;
 413                         }
 414                 }
 415                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 416                 return $permErrors;
 417         }
 418
 419         /**
 420          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 421          * but with the following differences:
 422          * - If redlink=1, the user will be redirected to the page
 423          * - If there is content to display or the error occurs while either saving,
 424          *   previewing or showing the difference, it will be a
 425          *   "View source for ..." page displaying the source code after the error message.
 426          *
 427          * @since 1.19
 428          * @param $permErrors Array of permissions errors, as returned by
 429          *                    Title::getUserPermissionsErrors().
 430          */
 431         protected function displayPermissionsError( array $permErrors ) {
 432                 global $wgRequest, $wgOut;
 433
 434                 if ( $wgRequest->getBool( 'redlink' ) ) {
 435                         // The edit page was reached via a red link.
 436                         // Redirect to the article page and let them click the edit tab if
 437                         // they really want a permission error.
 438                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 439                         return;
 440                 }
 441
 442                 $content = $this->getContentObject();
 443
 444                 # Use the normal message if there's nothing to display
 445                 if ( $this->firsttime && $content->isEmpty() ) {
 446                         $action = $this->mTitle->exists() ? 'edit' :
 447                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 448                         throw new PermissionsError( $action, $permErrors );
 449                 }
 450
 451                 $wgOut->setPageTitle( wfMessage( 'viewsource-title', $this->getContextTitle()->getPrefixedText() ) );
 452                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 453                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 454                 $wgOut->addHTML( "<hr />\n" );
 455
 456                 # If the user made changes, preserve them when showing the markup
 457                 # (This happens when a user is blocked during edit, for instance)
 458                 if ( !$this->firsttime ) {
 459                         $text = $this->textbox1;
 460                         $wgOut->addWikiMsg( 'viewyourtext' );
 461                 } else {
 462                         $text = $content->serialize( $this->content_format );
 463                         $wgOut->addWikiMsg( 'viewsourcetext' );
 464                 }
 465
 466                 $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 467
 468                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 469                         Linker::formatTemplates( $this->getTemplates() ) ) );
 470
 471                 if ( $this->mTitle->exists() ) {
 472                         $wgOut->returnToMain( null, $this->mTitle );
 473                 }
 474         }
 475
 476         /**
 477          * Show a read-only error
 478          * Parameters are the same as OutputPage:readOnlyPage()
 479          * Redirect to the article page if redlink=1
 480          * @deprecated in 1.19; use displayPermissionsError() instead
 481          */
 482         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 483                 wfDeprecated( __METHOD__, '1.19' );
 484
 485                 global $wgRequest, $wgOut;
 486                 if ( $wgRequest->getBool( 'redlink' ) ) {
 487                         // The edit page was reached via a red link.
 488                         // Redirect to the article page and let them click the edit tab if
 489                         // they really want a permission error.
 490                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 491                 } else {
 492                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 493                 }
 494         }
 495
 496         /**
 497          * Should we show a preview when the edit form is first shown?
 498          *
 499          * @return bool
 500          */
 501         protected function previewOnOpen() {
 502                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 503                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 504                         // Explicit override from request
 505                         return true;
 506                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 507                         // Explicit override from request
 508                         return false;
 509                 } elseif ( $this->section == 'new' ) {
 510                         // Nothing *to* preview for new sections
 511                         return false;
 512                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 513                         // Standard preference behaviour
 514                         return true;
 515                 } elseif ( !$this->mTitle->exists() &&
 516                   isset($wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]) &&
 517                   $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 518                 {
 519                         // Categories are special
 520                         return true;
 521                 } else {
 522                         return false;
 523                 }
 524         }
 525
 526         /**
 527          * Checks whether the user entered a skin name in uppercase,
 528          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 529          *
 530          * @return bool
 531          */
 532         protected function isWrongCaseCssJsPage() {
 533                 if( $this->mTitle->isCssJsSubpage() ) {
 534                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 535                         $skins = array_merge(
 536                                 array_keys( Skin::getSkinNames() ),
 537                                 array( 'common' )
 538                         );
 539                         return !in_array( $name, $skins )
 540                                 && in_array( strtolower( $name ), $skins );
 541                 } else {
 542                         return false;
 543                 }
 544         }
 545
 546         /**
 547          * Does this EditPage class support section editing?
 548          * This is used by EditPage subclasses to indicate their ui cannot handle section edits
 549          *
 550          * @return bool
 551          */
 552         protected function isSectionEditSupported() {
 553                 return true;
 554         }
 555
 556         /**
 557          * This function collects the form data and uses it to populate various member variables.
 558          * @param $request WebRequest
 559          */
 560         function importFormData( &$request ) {
 561                 global $wgLang, $wgUser;
 562
 563                 wfProfileIn( __METHOD__ );
 564
 565                 # Section edit can come from either the form or a link
 566                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 567
 568                 if ( $request->wasPosted() ) {
 569                         # These fields need to be checked for encoding.
 570                         # Also remove trailing whitespace, but don't remove _initial_
 571                         # whitespace from the text boxes. This may be significant formatting.
 572                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 573                         if ( !$request->getCheck('wpTextbox2') ) {
 574                                 // Skip this if wpTextbox2 has input, it indicates that we came
 575                                 // from a conflict page with raw page text, not a custom form
 576                                 // modified by subclasses
 577                                 wfProfileIn( get_class($this)."::importContentFormData" );
 578                                 $textbox1 = $this->importContentFormData( $request ); #FIXME: what should this return??
 579                                 if ( isset($textbox1) )
 580                                         $this->textbox1 = $textbox1;
 581                                 wfProfileOut( get_class($this)."::importContentFormData" );
 582                         }
 583
 584                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 585                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary' ), 250 );
 586
 587                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 588                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 589                         # section titles.
 590                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 591
 592                         # Treat sectiontitle the same way as summary.
 593                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 594                         # currently doing double duty as both edit summary and section title. Right now this
 595                         # is just to allow API edits to work around this limitation, but this should be
 596                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 597                         $this->sectiontitle = $wgLang->truncate( $request->getText( 'wpSectionTitle' ), 250 );
 598                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 599
 600                         $this->edittime = $request->getVal( 'wpEdittime' );
 601                         $this->starttime = $request->getVal( 'wpStarttime' );
 602
 603                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 604
 605                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 606                                 // wpTextbox1 field is missing, possibly due to being "too big"
 607                                 // according to some filter rules such as Suhosin's setting for
 608                                 // suhosin.request.max_value_length (d'oh)
 609                                 $this->incompleteForm = true;
 610                         } else {
 611                                 // edittime should be one of our last fields; if it's missing,
 612                                 // the submission probably broke somewhere in the middle.
 613                                 $this->incompleteForm = is_null( $this->edittime );
 614                         }
 615                         if ( $this->incompleteForm ) {
 616                                 # If the form is incomplete, force to preview.
 617                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 618                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 619                                 $this->preview = true;
 620                         } else {
 621                                 /* Fallback for live preview */
 622                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 623                                 $this->diff = $request->getCheck( 'wpDiff' );
 624
 625                                 // Remember whether a save was requested, so we can indicate
 626                                 // if we forced preview due to session failure.
 627                                 $this->mTriedSave = !$this->preview;
 628
 629                                 if ( $this->tokenOk( $request ) ) {
 630                                         # Some browsers will not report any submit button
 631                                         # if the user hits enter in the comment box.
 632                                         # The unmarked state will be assumed to be a save,
 633                                         # if the form seems otherwise complete.
 634                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 635                                 } elseif ( $this->diff ) {
 636                                         # Failed token check, but only requested "Show Changes".
 637                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 638                                 } else {
 639                                         # Page might be a hack attempt posted from
 640                                         # an external site. Preview instead of saving.
 641                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 642                                         $this->preview = true;
 643                                 }
 644                         }
 645                         $this->save = !$this->preview && !$this->diff;
 646                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 647                                 $this->edittime = null;
 648                         }
 649
 650                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 651                                 $this->starttime = null;
 652                         }
 653
 654                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 655
 656                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 657                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 658
 659                         # Don't force edit summaries when a user is editing their own user or talk page
 660                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 661                                 $this->mTitle->getText() == $wgUser->getName() )
 662                         {
 663                                 $this->allowBlankSummary = true;
 664                         } else {
 665                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary');
 666                         }
 667
 668                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 669                 } else {
 670                         # Not a posted form? Start with nothing.
 671                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 672                         $this->textbox1     = ''; #FIXME: track content object
 673                         $this->summary      = '';
 674                         $this->sectiontitle = '';
 675                         $this->edittime     = '';
 676                         $this->starttime    = wfTimestampNow();
 677                         $this->edit         = false;
 678                         $this->preview      = false;
 679                         $this->save         = false;
 680                         $this->diff         = false;
 681                         $this->minoredit    = false;
 682                         $this->watchthis    = $request->getBool( 'watchthis', false ); // Watch may be overriden by request parameters
 683                         $this->recreate     = false;
 684
 685                         // When creating a new section, we can preload a section title by passing it as the
 686                         // preloadtitle parameter in the URL (Bug 13100)
 687                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 688                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 689                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 690                                 $this->summary = $request->getVal( 'preloadtitle' );
 691                         }
 692                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 693                                 $this->summary = $request->getText( 'summary' );
 694                         }
 695
 696                         if ( $request->getVal( 'minor' ) ) {
 697                                 $this->minoredit = true;
 698                         }
 699                 }
 700
 701                 $this->oldid = $request->getInt( 'oldid' );
 702
 703                 $this->bot = $request->getBool( 'bot', true );
 704                 $this->nosummary = $request->getBool( 'nosummary' );
 705
 706                 $content_handler = ContentHandler::getForTitle( $this->mTitle );
 707                 $this->content_model = $request->getText( 'model', $content_handler->getModelName() ); #may be overridden by revision
 708                 $this->content_format = $request->getText( 'format', $content_handler->getDefaultFormat() ); #may be overridden by revision
 709
 710                 #TODO: check if the desired model is allowed in this namespace, and if a transition from the page's current model to the new model is allowed
 711                 #TODO: check if the desired content model supports the given content format!
 712
 713                 $this->live = $request->getCheck( 'live' );
 714                 $this->editintro = $request->getText( 'editintro',
 715                         // Custom edit intro for new sections
 716                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 717
 718                 // Allow extensions to modify form data
 719                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 720
 721                 wfProfileOut( __METHOD__ );
 722         }
 723
 724         /**
 725          * Subpage overridable method for extracting the page content data from the
 726          * posted form to be placed in $this->textbox1, if using customized input
 727          * this method should be overrided and return the page text that will be used
 728          * for saving, preview parsing and so on...
 729          *
 730          * @param $request WebRequest
 731          */
 732         protected function importContentFormData( &$request ) {
 733                 return; // Don't do anything, EditPage already extracted wpTextbox1
 734         }
 735
 736         /**
 737          * Initialise form fields in the object
 738          * Called on the first invocation, e.g. when a user clicks an edit link
 739          * @return bool -- if the requested section is valid
 740          */
 741         function initialiseForm() {
 742                 global $wgUser;
 743                 $this->edittime = $this->mArticle->getTimestamp();
 744
 745                 $content = $this->getContentObject( false ); #TODO: track content object?!
 746                 $this->textbox1 = $content->serialize( $this->content_format );
 747
 748                 // activate checkboxes if user wants them to be always active
 749                 # Sort out the "watch" checkbox
 750                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 751                         # Watch all edits
 752                         $this->watchthis = true;
 753                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 754                         # Watch creations
 755                         $this->watchthis = true;
 756                 } elseif ( $this->mTitle->userIsWatching() ) {
 757                         # Already watched
 758                         $this->watchthis = true;
 759                 }
 760                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 761                         $this->minoredit = true;
 762                 }
 763                 if ( $this->textbox1 === false ) {
 764                         return false;
 765                 }
 766                 wfProxyCheck();
 767                 return true;
 768         }
 769
 770         /**
 771          * Fetch initial editing page content.
 772          *
 773          * @param $def_text string
 774          * @return mixed string on success, $def_text for invalid sections
 775          * @private
 776          * @deprecated since 1.20
 777          */
 778         function getContent( $def_text = false ) { #FIXME: deprecated, replace usage!
 779                 if ( $def_text !== null && $def_text !== false && $def_text !== '' ) {
 780                         $def_content = ContentHandler::makeContent( $def_text, $this->getTitle() );
 781                 } else {
 782                         $def_content = false;
 783                 }
 784
 785                 $content = $this->getContentObject( $def_content );
 786
 787                 return $content->serialize( $this->content_format ); #XXX: really use serialized form? use ContentHandler::getContentText() instead?
 788         }
 789
 790         private function getContentObject( $def_content = null ) { #FIXME: use this!
 791                 global $wgOut, $wgRequest;
 792
 793                 wfProfileIn( __METHOD__ );
 794
 795                 $content = false;
 796
 797                 // For message page not locally set, use the i18n message.
 798                 // For other non-existent articles, use preload text if any.
 799                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
 800                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
 801                                 # If this is a system message, get the default text.
 802                                 $msg = $this->mTitle->getDefaultMessageText();
 803
 804                                 $content = new WikitextContent($msg); //XXX: really hardcode wikitext here?
 805                         }
 806                         if ( $content === false ) {
 807                                 # If requested, preload some text.
 808                                 $preload = $wgRequest->getVal( 'preload',
 809                                         // Custom preload text for new sections
 810                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 811
 812                                 $content = $this->getPreloadedContent( $preload );
 813                         }
 814                 // For existing pages, get text based on "undo" or section parameters.
 815                 } else {
 816                         if ( $this->section != '' ) {
 817                                 // Get section edit text (returns $def_text for invalid sections)
 818                                 $orig = $this->getOriginalContent();
 819                                 $content = $orig ? $orig->getSection( $this->section ) : null;
 820
 821                                 if ( !$content ) $content = $def_content;
 822                         } else {
 823                                 $undoafter = $wgRequest->getInt( 'undoafter' );
 824                                 $undo = $wgRequest->getInt( 'undo' );
 825
 826                                 if ( $undo > 0 && $undoafter > 0 ) {
 827                                         if ( $undo < $undoafter ) {
 828                                                 # If they got undoafter and undo round the wrong way, switch them
 829                                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 830                                         }
 831
 832                                         $undorev = Revision::newFromId( $undo );
 833                                         $oldrev = Revision::newFromId( $undoafter );
 834
 835                                         # Sanity check, make sure it's the right page,
 836                                         # the revisions exist and they were not deleted.
 837                                         # Otherwise, $content will be left as-is.
 838                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 839                                                 $undorev->getPage() == $oldrev->getPage() &&
 840                                                 $undorev->getPage() == $this->mTitle->getArticleId() &&
 841                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 842                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 843
 844                                                 $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
 845
 846                                                 if ( $content === false ) {
 847                                                         # Warn the user that something went wrong
 848                                                         $undoMsg = 'failure';
 849                                                 } else {
 850                                                         # Inform the user of our success and set an automatic edit summary
 851                                                         $undoMsg = 'success';
 852
 853                                                         # If we just undid one rev, use an autosummary
 854                                                         $firstrev = $oldrev->getNext();
 855                                                         if ( $firstrev->getId() == $undo ) {
 856                                                                 $undoSummary = wfMsgForContent( 'undo-summary', $undo, $undorev->getUserText() );
 857                                                                 if ( $this->summary === '' ) {
 858                                                                         $this->summary = $undoSummary;
 859                                                                 } else {
 860                                                                         $this->summary = $undoSummary . wfMsgForContent( 'colon-separator' ) . $this->summary;
 861                                                                 }
 862                                                                 $this->undidRev = $undo;
 863                                                         }
 864                                                         $this->formtype = 'diff';
 865                                                 }
 866                                         } else {
 867                                                 // Failed basic sanity checks.
 868                                                 // Older revisions may have been removed since the link
 869                                                 // was created, or we may simply have got bogus input.
 870                                                 $undoMsg = 'norev';
 871                                         }
 872
 873                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"error mw-undo-{$undoMsg}\">" .
 874                                                 wfMsgNoTrans( 'undo-' . $undoMsg ) . '</div>', true, /* interface */true );
 875                                 }
 876
 877                                 if ( $content === false ) {
 878                                         $content = $this->getOriginalContent();
 879                                 }
 880                         }
 881                 }
 882
 883                 wfProfileOut( __METHOD__ );
 884                 return $content;
 885         }
 886
 887         /**
 888          * Get the content of the wanted revision, without section extraction.
 889          *
 890          * The result of this function can be used to compare user's input with
 891          * section replaced in its context (using WikiPage::replaceSection())
 892          * to the original text of the edit.
 893          *
 894          * This difers from Article::getContent() that when a missing revision is
 895          * encountered the result will be an empty string and not the
 896          * 'missing-article' message.
 897          *
 898          * @since 1.19
 899          * @return string
 900          */
 901         private function getOriginalContent() { #FIXME: use Content! set content_model and content_format!
 902                 if ( $this->section == 'new' ) {
 903                         return $this->getCurrentContent();
 904                 }
 905                 $revision = $this->mArticle->getRevisionFetched();
 906                 if ( $revision === null ) {
 907                         if ( !$this->content_model ) $this->content_model = $this->getTitle()->getContentModelName();
 908                         $handler = ContentHandler::getForModelName( $this->content_model );
 909
 910                         return $handler->emptyContent();
 911                 }
 912
 913                 $content = $this->mArticle->getContentObject();
 914                 return $content;
 915         }
 916
 917         /**
 918          * Get the current content of the page. This is basically similar to
 919          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
 920          * content object is returned instead of null.
 921          *
 922          * @since 1.20
 923          * @return string
 924          */
 925         private function getCurrentContent() {
 926                 $rev = $this->mArticle->getRevision();
 927                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
 928
 929                 if ( $content  === false || $content === null ) {
 930                         if ( !$this->content_model ) $this->content_model = $this->getTitle()->getContentModelName();
 931                         $handler = ContentHandler::getForModelName( $this->content_model );
 932
 933                         return $handler->emptyContent();
 934                 } else {
 935                         #FIXME: nasty side-effect!
 936                         $this->content_model = $rev->getContentModelName();
 937                         $this->content_format = $rev->getContentFormat();
 938
 939                         return $content;
 940                 }
 941         }
 942
 943         /**
 944          * Use this method before edit() to preload some text into the edit box
 945          *
 946          * @param $text string
 947          * @deprecated since 1.20
 948          */
 949         public function setPreloadedText( $text ) { #FIXME: deprecated, use setPreloadedContent()
 950                 wfDeprecated( __METHOD__, "1.20" );
 951
 952                 $content = ContentHandler::makeContent( $text, $this->getTitle() );
 953
 954                 $this->setPreloadedContent( $content );
 955         }
 956
 957         /**
 958          * Use this method before edit() to preload some content into the edit box
 959          *
 960          * @param $content Content
 961          */
 962         public function setPreloadedContent( Content $content ) { #FIXME: use this!
 963                 $this->mPreloadedContent = $content;
 964         }
 965
 966         /**
 967          * Get the contents to be preloaded into the box, either set by
 968          * an earlier setPreloadText() or by loading the given page.
 969          *
 970          * @param $preload String: representing the title to preload from.
 971          * @return String
 972          * @deprecated since 1.20
 973          */
 974         protected function getPreloadedText( $preload ) { #FIXME: B/C only, replace usage!
 975                 wfDeprecated( __METHOD__, "1.20" );
 976
 977                 $content = $this->getPreloadedContent( $preload );
 978                 $text = $content->serialize( $this->content_format ); #XXX: really use serialized form? use ContentHandler::getContentText() instead?!
 979
 980                 return $text;
 981         }
 982
 983         protected function getPreloadedContent( $preload ) { #FIXME: use this!
 984                 global $wgUser;
 985
 986                 if ( !empty( $this->mPreloadContent ) ) {
 987                         return $this->mPreloadContent;
 988                 }
 989
 990                 $handler = ContentHandler::getForTitle( $this->getTitle() );
 991
 992                 if ( $preload === '' ) {
 993                         return $handler->emptyContent();
 994                 }
 995
 996                 $title = Title::newFromText( $preload );
 997                 # Check for existence to avoid getting MediaWiki:Noarticletext
 998                 if ( $title === null || !$title->exists() || !$title->userCan( 'read' ) ) {
 999                         return $handler->emptyContent();
1000                 }
1001
1002                 $page = WikiPage::factory( $title );
1003                 if ( $page->isRedirect() ) {
1004                         $title = $page->getRedirectTarget();
1005                         # Same as before
1006                         if ( $title === null || !$title->exists() || !$title->userCan( 'read' ) ) {
1007                                 return $handler->emptyContent();
1008                         }
1009                         $page = WikiPage::factory( $title );
1010                 }
1011
1012                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1013                 $content = $page->getContent( Revision::RAW );
1014
1015                 return $content->preloadTransform( $title, $parserOptions );
1016         }
1017
1018         /**
1019          * Make sure the form isn't faking a user's credentials.
1020          *
1021          * @param $request WebRequest
1022          * @return bool
1023          * @private
1024          */
1025         function tokenOk( &$request ) {
1026                 global $wgUser;
1027                 $token = $request->getVal( 'wpEditToken' );
1028                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1029                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1030                 return $this->mTokenOk;
1031         }
1032
1033         /**
1034          * Attempt submission
1035          * @return bool false if output is done, true if the rest of the form should be displayed
1036          */
1037         function attemptSave() {
1038                 global $wgUser, $wgOut;
1039
1040                 $resultDetails = false;
1041                 # Allow bots to exempt some edits from bot flagging
1042                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1043                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1044                 // FIXME: once the interface for internalAttemptSave() is made nicer, this should use the message in $status
1045
1046                 if ( $status->value == self::AS_SUCCESS_UPDATE || $status->value == self::AS_SUCCESS_NEW_ARTICLE ) {
1047                         $this->didSave = true;
1048                 }
1049
1050                 switch ( $status->value ) {
1051                         case self::AS_HOOK_ERROR_EXPECTED:
1052                         case self::AS_CONTENT_TOO_BIG:
1053                         case self::AS_ARTICLE_WAS_DELETED:
1054                         case self::AS_CONFLICT_DETECTED:
1055                         case self::AS_SUMMARY_NEEDED:
1056                         case self::AS_TEXTBOX_EMPTY:
1057                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1058                         case self::AS_END:
1059                                 return true;
1060
1061                         case self::AS_HOOK_ERROR:
1062                         case self::AS_FILTERING:
1063                                 return false;
1064
1065                         case self::AS_PARSE_ERROR:
1066                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>');
1067                                 #FIXME: cause editform to be shown again, not just an error!
1068                                 return false;
1069
1070                         case self::AS_SUCCESS_NEW_ARTICLE:
1071                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1072                                 $anchor = isset ( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1073                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1074                                 return false;
1075
1076                         case self::AS_SUCCESS_UPDATE:
1077                                 $extraQuery = '';
1078                                 $sectionanchor = $resultDetails['sectionanchor'];
1079
1080                                 // Give extensions a chance to modify URL query on update
1081                                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this->mArticle, &$sectionanchor, &$extraQuery ) );
1082
1083                                 if ( $resultDetails['redirect'] ) {
1084                                         if ( $extraQuery == '' ) {
1085                                                 $extraQuery = 'redirect=no';
1086                                         } else {
1087                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1088                                         }
1089                                 }
1090                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1091                                 return false;
1092
1093                         case self::AS_BLANK_ARTICLE:
1094                                 $wgOut->redirect( $this->getContextTitle()->getFullURL() );
1095                                 return false;
1096
1097                         case self::AS_SPAM_ERROR:
1098                                 $this->spamPageWithContent( $resultDetails['spam'] );
1099                                 return false;
1100
1101                         case self::AS_BLOCKED_PAGE_FOR_USER:
1102                                 throw new UserBlockedError( $wgUser->mBlock );
1103
1104                         case self::AS_IMAGE_REDIRECT_ANON:
1105                         case self::AS_IMAGE_REDIRECT_LOGGED:
1106                                 throw new PermissionsError( 'upload' );
1107
1108                         case self::AS_READ_ONLY_PAGE_ANON:
1109                         case self::AS_READ_ONLY_PAGE_LOGGED:
1110                                 throw new PermissionsError( 'edit' );
1111
1112                         case self::AS_READ_ONLY_PAGE:
1113                                 throw new ReadOnlyError;
1114
1115                         case self::AS_RATE_LIMITED:
1116                                 throw new ThrottledError();
1117
1118                         case self::AS_NO_CREATE_PERMISSION:
1119                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1120                                 throw new PermissionsError( $permission );
1121
1122                 }
1123                 return false;
1124         }
1125
1126         /**
1127          * Attempt submission (no UI)
1128          *
1129          * @param $result
1130          * @param $bot bool
1131          *
1132          * @return Status object, possibly with a message, but always with one of the AS_* constants in $status->value,
1133          *
1134          * FIXME: This interface is TERRIBLE, but hard to get rid of due to various error display idiosyncrasies. There are
1135          * also lots of cases where error metadata is set in the object and retrieved later instead of being returned, e.g.
1136          * AS_CONTENT_TOO_BIG and AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some time.
1137          */
1138         function internalAttemptSave( &$result, $bot = false ) {
1139                 global $wgFilterCallback, $wgUser, $wgRequest, $wgParser;
1140                 global $wgMaxArticleSize;
1141
1142                 $status = Status::newGood();
1143
1144                 wfProfileIn( __METHOD__  );
1145                 wfProfileIn( __METHOD__ . '-checks' );
1146
1147                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
1148                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1149                         $status->fatal( 'hookaborted' );
1150                         $status->value = self::AS_HOOK_ERROR;
1151                         wfProfileOut( __METHOD__ . '-checks' );
1152                         wfProfileOut( __METHOD__  );
1153                         return $status;
1154                 }
1155
1156                 # Check image redirect
1157                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1158                         Title::newFromRedirect( $this->textbox1 ) instanceof Title && #FIXME: use content handler to check for redirect
1159                         !$wgUser->isAllowed( 'upload' ) ) {
1160                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1161                                 $status->setResult( false, $code );
1162
1163                                 wfProfileOut( __METHOD__ . '-checks' );
1164                                 wfProfileOut( __METHOD__  );
1165
1166                                 return $status;
1167                 }
1168
1169                 # Check for spam
1170                 $match = self::matchSummarySpamRegex( $this->summary );
1171                 if ( $match === false ) {
1172                         $match = self::matchSpamRegex( $this->textbox1 );
1173                 }
1174                 if ( $match !== false ) {
1175                         $result['spam'] = $match;
1176                         $ip = $wgRequest->getIP();
1177                         $pdbk = $this->mTitle->getPrefixedDBkey();
1178                         $match = str_replace( "\n", '', $match );
1179                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1180                         $status->fatal( 'spamprotectionmatch', $match );
1181                         $status->value = self::AS_SPAM_ERROR;
1182                         wfProfileOut( __METHOD__ . '-checks' );
1183                         wfProfileOut( __METHOD__ );
1184                         return $status;
1185                 }
1186                 if ( $wgFilterCallback && is_callable( $wgFilterCallback ) && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
1187                         # Error messages or other handling should be performed by the filter function
1188                         $status->setResult( false, self::AS_FILTERING );
1189                         wfProfileOut( __METHOD__ . '-checks' );
1190                         wfProfileOut( __METHOD__ );
1191                         return $status;
1192                 }
1193                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
1194                         # Error messages etc. could be handled within the hook...
1195                         $status->fatal( 'hookaborted' );
1196                         $status->value = self::AS_HOOK_ERROR;
1197                         wfProfileOut( __METHOD__ . '-checks' );
1198                         wfProfileOut( __METHOD__ );
1199                         return $status;
1200                 } elseif ( $this->hookError != '' ) {
1201                         # ...or the hook could be expecting us to produce an error
1202                         $status->fatal( 'hookaborted' );
1203                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1204                         wfProfileOut( __METHOD__ . '-checks' );
1205                         wfProfileOut( __METHOD__ );
1206                         return $status;
1207                 }
1208
1209                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1210                         // Auto-block user's IP if the account was "hard" blocked
1211                         $wgUser->spreadAnyEditBlock();
1212                         # Check block state against master, thus 'false'.
1213                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1214                         wfProfileOut( __METHOD__ . '-checks' );
1215                         wfProfileOut( __METHOD__ );
1216                         return $status;
1217                 }
1218
1219                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1220                 if ( $this->kblength > $wgMaxArticleSize ) {
1221                         // Error will be displayed by showEditForm()
1222                         $this->tooBig = true;
1223                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1224                         wfProfileOut( __METHOD__ . '-checks' );
1225                         wfProfileOut( __METHOD__ );
1226                         return $status;
1227                 }
1228
1229                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1230                         if ( $wgUser->isAnon() ) {
1231                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1232                                 wfProfileOut( __METHOD__ . '-checks' );
1233                                 wfProfileOut( __METHOD__ );
1234                                 return $status;
1235                         } else {
1236                                 $status->fatal( 'readonlytext' );
1237                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1238                                 wfProfileOut( __METHOD__ . '-checks' );
1239                                 wfProfileOut( __METHOD__ );
1240                                 return $status;
1241                         }
1242                 }
1243
1244                 if ( wfReadOnly() ) {
1245                         $status->fatal( 'readonlytext' );
1246                         $status->value = self::AS_READ_ONLY_PAGE;
1247                         wfProfileOut( __METHOD__ . '-checks' );
1248                         wfProfileOut( __METHOD__ );
1249                         return $status;
1250                 }
1251                 if ( $wgUser->pingLimiter() ) {
1252                         $status->fatal( 'actionthrottledtext' );
1253                         $status->value = self::AS_RATE_LIMITED;
1254                         wfProfileOut( __METHOD__ . '-checks' );
1255                         wfProfileOut( __METHOD__ );
1256                         return $status;
1257                 }
1258
1259                 # If the article has been deleted while editing, don't save it without
1260                 # confirmation
1261                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1262                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1263                         wfProfileOut( __METHOD__ . '-checks' );
1264                         wfProfileOut( __METHOD__ );
1265                         return $status;
1266                 }
1267
1268                 wfProfileOut( __METHOD__ . '-checks' );
1269
1270                 # If article is new, insert it.
1271                 $aid = $this->mTitle->getArticleID( Title::GAID_FOR_UPDATE );
1272                 $new = ( $aid == 0 );
1273
1274                 try {
1275                         if ( $new ) {
1276                                 // Late check for create permission, just in case *PARANOIA*
1277                                 if ( !$this->mTitle->userCan( 'create' ) ) {
1278                                         $status->fatal( 'nocreatetext' );
1279                                         $status->value = self::AS_NO_CREATE_PERMISSION;
1280                                         wfDebug( __METHOD__ . ": no create permission\n" );
1281                                         wfProfileOut( __METHOD__ );
1282                                         return $status;
1283                                 }
1284
1285                                 # Don't save a new article if it's blank.
1286                                 if ( $this->textbox1 == '' ) {
1287                                         $status->setResult( false, self::AS_BLANK_ARTICLE );
1288                                         wfProfileOut( __METHOD__ );
1289                                         return $status;
1290                                 }
1291
1292                                 // Run post-section-merge edit filter
1293                                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
1294                                         # Error messages etc. could be handled within the hook...
1295                                         $status->fatal( 'hookaborted' );
1296                                         $status->value = self::AS_HOOK_ERROR;
1297                                         wfProfileOut( __METHOD__ );
1298                                         return $status;
1299                                 } elseif ( $this->hookError != '' ) {
1300                                         # ...or the hook could be expecting us to produce an error
1301                                         $status->fatal( 'hookaborted' );
1302                                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1303                                         wfProfileOut( __METHOD__ );
1304                                         return $status;
1305                                 }
1306
1307                 $content = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format );
1308
1309                                 # Handle the user preference to force summaries here. Check if it's not a redirect.
1310                                 if ( !$this->allowBlankSummary && !$content->isRedirect() ) {
1311                                         if ( md5( $this->summary ) == $this->autoSumm ) {
1312                                                 $this->missingSummary = true;
1313                                                 $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1314                                                 $status->value = self::AS_SUMMARY_NEEDED;
1315                                                 wfProfileOut( __METHOD__ );
1316                                                 return $status;
1317                                         }
1318                                 }
1319
1320                                 $result['sectionanchor'] = '';
1321                                 if ( $this->section == 'new' ) {
1322                                         if ( $this->sectiontitle !== '' ) {
1323                                                 // Insert the section title above the content.
1324                                                 $content = $content->addSectionHeader( $this->sectiontitle );
1325
1326                                                 // Jump to the new section
1327                                                 $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1328
1329                                                 // If no edit summary was specified, create one automatically from the section
1330                                                 // title and have it link to the new section. Otherwise, respect the summary as
1331                                                 // passed.
1332                                                 if ( $this->summary === '' ) {
1333                                                         $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1334                                                         $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSectionTitle );
1335                                                 }
1336                                         } elseif ( $this->summary !== '' ) {
1337                                                 // Insert the section title above the content.
1338                                                 $content = $content->addSectionHeader( $this->sectiontitle );
1339
1340                                                 // Jump to the new section
1341                                                 $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1342
1343                                                 // Create a link to the new section from the edit summary.
1344                                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
1345                                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1346                                         }
1347                                 }
1348
1349                                 $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1350
1351                         } else {
1352
1353                                 # Article exists. Check for edit conflict.
1354
1355                                 $this->mArticle->clear(); # Force reload of dates, etc.
1356                                 $timestamp = $this->mArticle->getTimestamp();
1357
1358                                 wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1359
1360                                 if ( $timestamp != $this->edittime ) {
1361                                         $this->isConflict = true;
1362                                         if ( $this->section == 'new' ) {
1363                                                 if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1364                                                         $this->mArticle->getComment() == $this->summary ) {
1365                                                         // Probably a duplicate submission of a new comment.
1366                                                         // This can happen when squid resends a request after
1367                                                         // a timeout but the first one actually went through.
1368                                                         wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
1369                                                 } else {
1370                                                         // New comment; suppress conflict.
1371                                                         $this->isConflict = false;
1372                                                         wfDebug( __METHOD__ .": conflict suppressed; new section\n" );
1373                                                 }
1374                                         } elseif ( $this->section == '' && $this->userWasLastToEdit( $wgUser->getId(), $this->edittime ) ) {
1375                                                 # Suppress edit conflict with self, except for section edits where merging is required.
1376                                                 wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1377                                                 $this->isConflict = false;
1378                                         }
1379                                 }
1380
1381                                 // If sectiontitle is set, use it, otherwise use the summary as the section title (for
1382                                 // backwards compatibility with old forms/bots).
1383                                 if ( $this->sectiontitle !== '' ) {
1384                                         $sectionTitle = $this->sectiontitle;
1385                                 } else {
1386                                         $sectionTitle = $this->summary;
1387                                 }
1388
1389                                 $textbox_content = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format );
1390                                 $content = false;
1391
1392                                 if ( $this->isConflict ) {
1393                                         wfDebug( __METHOD__ . ": conflict! getting section '$this->section' for time '$this->edittime' (article time '{$timestamp}')\n" );
1394
1395                                         $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle, $this->edittime );
1396                                 } else {
1397                                         wfDebug( __METHOD__ . ": getting section '$this->section'\n" );
1398
1399                                         $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle );
1400                                 }
1401
1402                                 if ( is_null( $content ) ) {
1403                                         wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1404                                         $this->isConflict = true;
1405                                         $content = $textbox_content; // do not try to merge here!
1406                                 } elseif ( $this->isConflict ) {
1407                                         # Attempt merge
1408                                         if ( $this->mergeChangesIntoContent( $textbox_content ) ) {
1409                                                 // Successful merge! Maybe we should tell the user the good news?
1410                                                 $content = $textbox_content;
1411                                                 $this->isConflict = false;
1412                                                 wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1413                                         } else {
1414                                                 $this->section = '';
1415                                                 #$this->textbox1 = $text; #redundant, nothing to do here?
1416                                                 wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1417                                         }
1418                                 }
1419
1420                                 if ( $this->isConflict ) {
1421                                         $status->setResult( false, self::AS_CONFLICT_DETECTED );
1422                                         wfProfileOut( __METHOD__ );
1423                                         return $status;
1424                                 }
1425
1426                                 // Run post-section-merge edit filter
1427                                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $content->serialize( $this->content_format ), &$this->hookError, $this->summary ) )
1428                                         || !wfRunHooks( 'EditFilterMergedContent', array( $this, $content, &$this->hookError, $this->summary ) ) ) { #FIXME: document new hook
1429                                         # Error messages etc. could be handled within the hook...
1430                                         $status->fatal( 'hookaborted' );
1431                                         $status->value = self::AS_HOOK_ERROR;
1432                                         wfProfileOut( __METHOD__ );
1433                                         return $status;
1434                                 } elseif ( $this->hookError != '' ) {
1435                                         # ...or the hook could be expecting us to produce an error
1436                                         $status->fatal( 'hookaborted' );
1437                                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1438                                         wfProfileOut( __METHOD__ );
1439                                         return $status;
1440                                 }
1441
1442                                 # Handle the user preference to force summaries here, but not for null edits
1443                                 if ( $this->section != 'new' && !$this->allowBlankSummary
1444                                         && !$content->equals( $this->getOriginalContent() )
1445                                         && !$content->isRedirect() ) # check if it's not a redirect
1446                                 {
1447                                         if ( md5( $this->summary ) == $this->autoSumm ) {
1448                                                 $this->missingSummary = true;
1449                                                 $status->fatal( 'missingsummary' );
1450                                                 $status->value = self::AS_SUMMARY_NEEDED;
1451                                                 wfProfileOut( __METHOD__ );
1452                                                 return $status;
1453                                         }
1454                                 }
1455
1456                                 # And a similar thing for new sections
1457                                 if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1458                                         if ( trim( $this->summary ) == '' ) {
1459                                                 $this->missingSummary = true;
1460                                                 $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1461                                                 $status->value = self::AS_SUMMARY_NEEDED;
1462                                                 wfProfileOut( __METHOD__ );
1463                                                 return $status;
1464                                         }
1465                                 }
1466
1467                                 # All's well
1468                                 wfProfileIn( __METHOD__ . '-sectionanchor' );
1469                                 $sectionanchor = '';
1470                                 if ( $this->section == 'new' ) {
1471                                         if ( $this->textbox1 == '' ) {
1472                                                 $this->missingComment = true;
1473                                                 $status->fatal( 'missingcommenttext' );
1474                                                 $status->value = self::AS_TEXTBOX_EMPTY;
1475                                                 wfProfileOut( __METHOD__ . '-sectionanchor' );
1476                                                 wfProfileOut( __METHOD__ );
1477                                                 return $status;
1478                                         }
1479                                         if ( $this->sectiontitle !== '' ) {
1480                                                 $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1481                                                 // If no edit summary was specified, create one automatically from the section
1482                                                 // title and have it link to the new section. Otherwise, respect the summary as
1483                                                 // passed.
1484                                                 if ( $this->summary === '' ) {
1485                                                         $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1486                                                         $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSectionTitle );
1487                                                 }
1488                                         } elseif ( $this->summary !== '' ) {
1489                                                 $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1490                                                 # This is a new section, so create a link to the new section
1491                                                 # in the revision summary.
1492                                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
1493                                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1494                                         }
1495                                 } elseif ( $this->section != '' ) {
1496                                         # Try to get a section anchor from the section source, redirect to edited section if header found
1497                                         # XXX: might be better to integrate this into Article::replaceSection
1498                                         # for duplicate heading checking and maybe parsing
1499                                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1500                                         # we can't deal with anchors, includes, html etc in the header for now,
1501                                         # headline would need to be parsed to improve this
1502                                         if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1503                                                 $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1504                                         }
1505                                 }
1506                                 $result['sectionanchor'] = $sectionanchor;
1507                                 wfProfileOut( __METHOD__ . '-sectionanchor' );
1508
1509                                 // Save errors may fall down to the edit form, but we've now
1510                                 // merged the section into full text. Clear the section field
1511                                 // so that later submission of conflict forms won't try to
1512                                 // replace that into a duplicated mess.
1513                                 $this->textbox1 = $content->serialize( $this->content_format );
1514                                 $this->section = '';
1515
1516                                 $status->value = self::AS_SUCCESS_UPDATE;
1517                         }
1518
1519                         // Check for length errors again now that the section is merged in
1520                         $this->kblength = (int)( strlen( $content->serialize( $this->content_format ) ) / 1024 );
1521                         if ( $this->kblength > $wgMaxArticleSize ) {
1522                                 $this->tooBig = true;
1523                                 $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1524                                 wfProfileOut( __METHOD__ );
1525                                 return $status;
1526                         }
1527
1528                         $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1529                                 ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1530                                 ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1531                                 ( $bot ? EDIT_FORCE_BOT : 0 );
1532
1533                         $doEditStatus = $this->mArticle->doEditContent( $content, $this->summary, $flags, false, null, $this->content_format );
1534
1535                         if ( $doEditStatus->isOK() ) {
1536                                 $result['redirect'] = $content->isRedirect();
1537                                 $this->commitWatch();
1538                                 wfProfileOut( __METHOD__ );
1539                                 return $status;
1540                         } else {
1541                                 $this->isConflict = true;
1542                                 $doEditStatus->value = self::AS_END; // Destroys data doEdit() put in $status->value but who cares
1543                                 wfProfileOut( __METHOD__ );
1544                                 return $doEditStatus;
1545                         }
1546                 } catch (MWContentSerializationException $ex) {
1547                         $status->fatal( 'content-failed-to-parse', $this->content_model, $this->content_format, $ex->getMessage() );
1548                         $status->value = self::AS_PARSE_ERROR;
1549                         wfProfileOut( __METHOD__ );
1550                         return $status;
1551                 }
1552         }
1553
1554         /**
1555          * Commit the change of watch status
1556          */
1557         protected function commitWatch() {
1558                 global $wgUser;
1559                 if ( $this->watchthis xor $this->mTitle->userIsWatching() ) {
1560                         $dbw = wfGetDB( DB_MASTER );
1561                         $dbw->begin();
1562                         if ( $this->watchthis ) {
1563                                 WatchAction::doWatch( $this->mTitle, $wgUser );
1564                         } else {
1565                                 WatchAction::doUnwatch( $this->mTitle, $wgUser );
1566                         }
1567                         $dbw->commit();
1568                 }
1569         }
1570
1571         /**
1572          * Check if no edits were made by other users since
1573          * the time a user started editing the page. Limit to
1574          * 50 revisions for the sake of performance.
1575          *
1576          * @param $id int
1577          * @param $edittime string
1578          *
1579          * @return bool
1580          */
1581         protected function userWasLastToEdit( $id, $edittime ) {
1582                 if( !$id ) return false;
1583                 $dbw = wfGetDB( DB_MASTER );
1584                 $res = $dbw->select( 'revision',
1585                         'rev_user',
1586                         array(
1587                                 'rev_page' => $this->mTitle->getArticleId(),
1588                                 'rev_timestamp > '.$dbw->addQuotes( $dbw->timestamp($edittime) )
1589                         ),
1590                         __METHOD__,
1591                         array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
1592                 foreach ( $res as $row ) {
1593                         if( $row->rev_user != $id ) {
1594                                 return false;
1595                         }
1596                 }
1597                 return true;
1598         }
1599
1600         /**
1601          * @private
1602          * @todo document
1603          *
1604          * @parma $editText string
1605          *
1606          * @return bool
1607          * @deprecated since 1.20
1608          */
1609         function mergeChangesInto( &$editText ){
1610                 wfDebug( __METHOD__, "1.20" );
1611
1612                 $editContent = ContentHandler::makeContent( $editText, $this->getTitle(), $this->content_model, $this->content_format );
1613
1614                 $ok = $this->mergeChangesIntoContent( $editContent );
1615
1616                 if ( $ok ) {
1617                         $editText = $editContent->serialize( $this->content_format ); #XXX: really serialize?!
1618                         return true;
1619                 } else {
1620                         return false;
1621                 }
1622         }
1623
1624         /**
1625          * @private
1626          * @todo document
1627          *
1628          * @parma $editText string
1629          *
1630          * @return bool
1631          * @since since 1.20
1632          */
1633         private function mergeChangesIntoContent( &$editContent ){
1634                 wfProfileIn( __METHOD__ );
1635
1636                 $db = wfGetDB( DB_MASTER );
1637
1638                 // This is the revision the editor started from
1639                 $baseRevision = $this->getBaseRevision();
1640                 if ( is_null( $baseRevision ) ) {
1641                         wfProfileOut( __METHOD__ );
1642                         return false;
1643                 }
1644                 $baseContent = $baseRevision->getContent();
1645
1646                 // The current state, we want to merge updates into it
1647                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1648                 if ( is_null( $currentRevision ) ) {
1649                         wfProfileOut( __METHOD__ );
1650                         return false;
1651                 }
1652                 $currentContent = $currentRevision->getContent();
1653
1654                 $handler = ContentHandler::getForModelName( $baseContent->getModelName() );
1655
1656                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
1657
1658                 if ( $result ) {
1659                         $editContent = $result;
1660                         wfProfileOut( __METHOD__ );
1661                         return true;
1662                 } else {
1663                         wfProfileOut( __METHOD__ );
1664                         return false;
1665                 }
1666         }
1667
1668         /**
1669          * @return Revision
1670          */
1671         function getBaseRevision() {
1672                 if ( !$this->mBaseRevision ) {
1673                         $db = wfGetDB( DB_MASTER );
1674                         $baseRevision = Revision::loadFromTimestamp(
1675                                 $db, $this->mTitle, $this->edittime );
1676                         return $this->mBaseRevision = $baseRevision;
1677                 } else {
1678                         return $this->mBaseRevision;
1679                 }
1680         }
1681
1682         /**
1683          * Check given input text against $wgSpamRegex, and return the text of the first match.
1684          *
1685          * @param $text string
1686          *
1687          * @return string|false matching string or false
1688          */
1689         public static function matchSpamRegex( $text ) {
1690                 global $wgSpamRegex;
1691                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1692                 $regexes = (array)$wgSpamRegex;
1693                 return self::matchSpamRegexInternal( $text, $regexes );
1694         }
1695
1696         /**
1697          * Check given input text against $wgSpamRegex, and return the text of the first match.
1698          *
1699          * @parma $text string
1700          *
1701          * @return string|false  matching string or false
1702          */
1703         public static function matchSummarySpamRegex( $text ) {
1704                 global $wgSummarySpamRegex;
1705                 $regexes = (array)$wgSummarySpamRegex;
1706                 return self::matchSpamRegexInternal( $text, $regexes );
1707         }
1708
1709         /**
1710          * @param $text string
1711          * @param $regexes array
1712          * @return bool|string
1713          */
1714         protected static function matchSpamRegexInternal( $text, $regexes ) {
1715                 foreach( $regexes as $regex ) {
1716                         $matches = array();
1717                         if( preg_match( $regex, $text, $matches ) ) {
1718                                 return $matches[0];
1719                         }
1720                 }
1721                 return false;
1722         }
1723
1724         function setHeaders() {
1725                 global $wgOut, $wgUser;
1726
1727                 $wgOut->addModules( 'mediawiki.action.edit' );
1728
1729                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
1730                         $wgOut->addModules( 'mediawiki.legacy.preview' );
1731                 }
1732                 // Bug #19334: textarea jumps when editing articles in IE8
1733                 $wgOut->addStyle( 'common/IE80Fixes.css', 'screen', 'IE 8' );
1734
1735                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1736
1737                 # Enabled article-related sidebar, toplinks, etc.
1738                 $wgOut->setArticleRelated( true );
1739
1740                 if ( $this->isConflict ) {
1741                         $wgOut->setPageTitle( wfMessage( 'editconflict', $this->getContextTitle()->getPrefixedText() ) );
1742                 } elseif ( $this->section != '' ) {
1743                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1744                         $wgOut->setPageTitle( wfMessage( $msg, $this->getContextTitle()->getPrefixedText() ) );
1745                 } else {
1746                         # Use the title defined by DISPLAYTITLE magic word when present
1747                         if ( isset( $this->mParserOutput )
1748                          && ( $dt = $this->mParserOutput->getDisplayTitle() ) !== false ) {
1749                                 $title = $dt;
1750                         } else {
1751                                 $title = $this->getContextTitle()->getPrefixedText();
1752                         }
1753                         $wgOut->setPageTitle( wfMessage( 'editing', $title ) );
1754                 }
1755         }
1756
1757         /**
1758          * Show all applicable editing introductions
1759          */
1760         protected function showIntro() {
1761                 global $wgOut, $wgUser;
1762                 if ( $this->suppressIntro ) {
1763                         return;
1764                 }
1765
1766                 $namespace = $this->mTitle->getNamespace();
1767
1768                 if ( $namespace == NS_MEDIAWIKI ) {
1769                         # Show a warning if editing an interface message
1770                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
1771                 }
1772
1773                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
1774                 # Show log extract when the user is currently blocked
1775                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
1776                         $parts = explode( '/', $this->mTitle->getText(), 2 );
1777                         $username = $parts[0];
1778                         $user = User::newFromName( $username, false /* allow IP users*/ );
1779                         $ip = User::isIP( $username );
1780                         if ( !($user && $user->isLoggedIn()) && !$ip ) { # User does not exist
1781                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
1782                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
1783                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
1784                                 LogEventsList::showLogExtract(
1785                                         $wgOut,
1786                                         'block',
1787                                         $user->getUserPage(),
1788                                         '',
1789                                         array(
1790                                                 'lim' => 1,
1791                                                 'showIfEmpty' => false,
1792                                                 'msgKey' => array(
1793                                                         'blocked-notice-logextract',
1794                                                         $user->getName() # Support GENDER in notice
1795                                                 )
1796                                         )
1797                                 );
1798                         }
1799                 }
1800                 # Try to add a custom edit intro, or use the standard one if this is not possible.
1801                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
1802                         if ( $wgUser->isLoggedIn() ) {
1803                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
1804                         } else {
1805                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
1806                         }
1807                 }
1808                 # Give a notice if the user is editing a deleted/moved page...
1809                 if ( !$this->mTitle->exists() ) {
1810                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
1811                                 '', array( 'lim' => 10,
1812                                            'conds' => array( "log_action != 'revision'" ),
1813                                            'showIfEmpty' => false,
1814                                            'msgKey' => array( 'recreate-moveddeleted-warn') )
1815                         );
1816                 }
1817         }
1818
1819         /**
1820          * Attempt to show a custom editing introduction, if supplied
1821          *
1822          * @return bool
1823          */
1824         protected function showCustomIntro() {
1825                 if ( $this->editintro ) {
1826                         $title = Title::newFromText( $this->editintro );
1827                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
1828                                 global $wgOut;
1829                                 // Added using template syntax, to take <noinclude>'s into account.
1830                                 $wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
1831                                 return true;
1832                         } else {
1833                                 return false;
1834                         }
1835                 } else {
1836                         return false;
1837                 }
1838         }
1839
1840         /**
1841          * Send the edit form and related headers to $wgOut
1842          * @param $formCallback Callback that takes an OutputPage parameter; will be called
1843          *     during form output near the top, for captchas and the like.
1844          */
1845         function showEditForm( $formCallback = null ) {
1846                 global $wgOut, $wgUser;
1847
1848                 wfProfileIn( __METHOD__ );
1849
1850                 #need to parse the preview early so that we know which templates are used,
1851                 #otherwise users with "show preview after edit box" will get a blank list
1852                 #we parse this near the beginning so that setHeaders can do the title
1853                 #setting work instead of leaving it in getPreviewText
1854                 $previewOutput = '';
1855                 if ( $this->formtype == 'preview' ) {
1856                         $previewOutput = $this->getPreviewText();
1857                 }
1858
1859                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) );
1860
1861                 $this->setHeaders();
1862
1863                 if ( $this->showHeader() === false ) {
1864                         wfProfileOut( __METHOD__ );
1865                         return;
1866                 }
1867
1868                 $wgOut->addHTML( $this->editFormPageTop );
1869
1870                 if ( $wgUser->getOption( 'previewontop' ) ) {
1871                         $this->displayPreviewArea( $previewOutput, true );
1872                 }
1873
1874                 $wgOut->addHTML( $this->editFormTextTop );
1875
1876                 $showToolbar = true;
1877                 if ( $this->wasDeletedSinceLastEdit() ) {
1878                         if ( $this->formtype == 'save' ) {
1879                                 // Hide the toolbar and edit area, user can click preview to get it back
1880                                 // Add an confirmation checkbox and explanation.
1881                                 $showToolbar = false;
1882                         } else {
1883                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
1884                                         'deletedwhileediting' );
1885                         }
1886                 }
1887
1888                 #FIXME: add EditForm plugin interface and use it here! #FIXME: search for textarea1 and textares2, and allow EditForm to override all uses.
1889                 $wgOut->addHTML( Html::openElement( 'form', array( 'id' => 'editform', 'name' => 'editform',
1890                         'method' => 'post', 'action' => $this->getActionURL( $this->getContextTitle() ),
1891                         'enctype' => 'multipart/form-data' ) ) );
1892
1893                 if ( is_callable( $formCallback ) ) {
1894                         call_user_func_array( $formCallback, array( &$wgOut ) );
1895                 }
1896
1897                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1898
1899                 // Put these up at the top to ensure they aren't lost on early form submission
1900                 $this->showFormBeforeText();
1901
1902                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
1903                         $username = $this->lastDelete->user_name;
1904                         $comment = $this->lastDelete->log_comment;
1905
1906                         // It is better to not parse the comment at all than to have templates expanded in the middle
1907                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
1908                         $key = $comment === ''
1909                                 ? 'confirmrecreate-noreason'
1910                                 : 'confirmrecreate';
1911                         $wgOut->addHTML(
1912                                 '<div class="mw-confirm-recreate">' .
1913                                 wfMsgExt( $key, 'parseinline', $username, "<nowiki>$comment</nowiki>" ) .
1914                                 Xml::checkLabel( wfMsg( 'recreate' ), 'wpRecreate', 'wpRecreate', false,
1915                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
1916                                 ) .
1917                                 '</div>'
1918                         );
1919                 }
1920
1921                 # If a blank edit summary was previously provided, and the appropriate
1922                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1923                 # user being bounced back more than once in the event that a summary
1924                 # is not required.
1925                 #####
1926                 # For a bit more sophisticated detection of blank summaries, hash the
1927                 # automatic one and pass that in the hidden field wpAutoSummary.
1928                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
1929                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
1930                 }
1931
1932                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1933                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
1934
1935                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
1936
1937                 $wgOut->addHTML( Html::hidden( 'format', $this->content_format ) );
1938                 $wgOut->addHTML( Html::hidden( 'model', $this->content_model ) );
1939
1940                 if ( $this->section == 'new' ) {
1941                         $this->showSummaryInput( true, $this->summary );
1942                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
1943                 }
1944
1945                 $wgOut->addHTML( $this->editFormTextBeforeContent );
1946
1947                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
1948                         $wgOut->addHTML( EditPage::getEditToolbar() );
1949                 }
1950
1951                 if ( $this->isConflict ) {
1952                         // In an edit conflict bypass the overrideable content form method
1953                         // and fallback to the raw wpTextbox1 since editconflicts can't be
1954                         // resolved between page source edits and custom ui edits using the
1955                         // custom edit ui.
1956                         $this->textbox2 = $this->textbox1;
1957
1958                         $content = $this->getCurrentContent();
1959                         $this->textbox1 = $content->serialize( $this->content_format );
1960
1961                         $this->showTextbox1();
1962                 } else {
1963                         $this->showContentForm();
1964                 }
1965
1966                 $wgOut->addHTML( $this->editFormTextAfterContent );
1967
1968                 $wgOut->addWikiText( $this->getCopywarn() );
1969
1970                 $wgOut->addHTML( $this->editFormTextAfterWarn );
1971
1972                 $this->showStandardInputs();
1973
1974                 $this->showFormAfterText();
1975
1976                 $this->showTosSummary();
1977
1978                 $this->showEditTools();
1979
1980                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
1981
1982                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
1983                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
1984
1985                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
1986                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
1987
1988                 if ( $this->isConflict ) {
1989                         $this->showConflict();
1990                 }
1991
1992                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
1993
1994                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1995                         $this->displayPreviewArea( $previewOutput, false );
1996                 }
1997
1998                 wfProfileOut( __METHOD__ );
1999         }
2000
2001         /**
2002          * Extract the section title from current section text, if any.
2003          *
2004          * @param string $text
2005          * @return Mixed|string or false
2006          */
2007         public static function extractSectionTitle( $text ) {
2008                 preg_match( "/^(=+)(.+)\\1(\n|$)/i", $text, $matches );
2009                 if ( !empty( $matches[2] ) ) {
2010                         global $wgParser;
2011                         return $wgParser->stripSectionName(trim($matches[2]));
2012                 } else {
2013                         return false;
2014                 }
2015         }
2016
2017         protected function showHeader() {
2018                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2019
2020                 if ( $this->mTitle->isTalkPage() ) {
2021                         $wgOut->addWikiMsg( 'talkpagetext' );
2022                 }
2023
2024                 # Optional notices on a per-namespace and per-page basis
2025                 $editnotice_ns   = 'editnotice-'.$this->mTitle->getNamespace();
2026                 $editnotice_ns_message = wfMessage( $editnotice_ns )->inContentLanguage();
2027                 if ( $editnotice_ns_message->exists() ) {
2028                         $wgOut->addWikiText( $editnotice_ns_message->plain() );
2029                 }
2030                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
2031                         $parts = explode( '/', $this->mTitle->getDBkey() );
2032                         $editnotice_base = $editnotice_ns;
2033                         while ( count( $parts ) > 0 ) {
2034                                 $editnotice_base .= '-'.array_shift( $parts );
2035                                 $editnotice_base_msg = wfMessage( $editnotice_base )->inContentLanguage();
2036                                 if ( $editnotice_base_msg->exists() ) {
2037                                         $wgOut->addWikiText( $editnotice_base_msg->plain()  );
2038                                 }
2039                         }
2040                 } else {
2041                         # Even if there are no subpages in namespace, we still don't want / in MW ns.
2042                         $editnoticeText = $editnotice_ns . '-' . str_replace( '/', '-', $this->mTitle->getDBkey() );
2043                         $editnoticeMsg = wfMessage( $editnoticeText )->inContentLanguage();
2044                         if ( $editnoticeMsg->exists() ) {
2045                                 $wgOut->addWikiText( $editnoticeMsg->plain() );
2046                         }
2047                 }
2048
2049                 if ( $this->isConflict ) {
2050                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2051                         $this->edittime = $this->mArticle->getTimestamp();
2052                 } else {
2053                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2054                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2055                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2056                                 // Someone is welcome to try refactoring though
2057                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2058                                 return false;
2059                         }
2060
2061                         if ( $this->section != '' && $this->section != 'new' ) {
2062                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2063                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 );
2064                                         if ( $sectionTitle !== false ) {
2065                                                 $this->summary = "/* $sectionTitle */ ";
2066                                         }
2067                                 }
2068                         }
2069
2070                         if ( $this->missingComment ) {
2071                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2072                         }
2073
2074                         if ( $this->missingSummary && $this->section != 'new' ) {
2075                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2076                         }
2077
2078                         if ( $this->missingSummary && $this->section == 'new' ) {
2079                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2080                         }
2081
2082                         if ( $this->hookError !== '' ) {
2083                                 $wgOut->addWikiText( $this->hookError );
2084                         }
2085
2086                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2087                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2088                         }
2089
2090                         if ( $this->section != 'new' ) {
2091                                 $revision = $this->mArticle->getRevisionFetched();
2092                                 if ( $revision ) {
2093                                         // Let sysop know that this will make private content public if saved
2094
2095                                         if ( !$revision->userCan( Revision::DELETED_TEXT ) ) {
2096                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
2097                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2098                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
2099                                         }
2100
2101                                         if ( !$revision->isCurrent() ) {
2102                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2103                                                 $wgOut->addWikiMsg( 'editingold' );
2104                                         }
2105                                 } elseif ( $this->mTitle->exists() ) {
2106                                         // Something went wrong
2107
2108                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2109                                                 array( 'missing-article', $this->mTitle->getPrefixedText(),
2110                                                 wfMsgNoTrans( 'missingarticle-rev', $this->oldid ) ) );
2111                                 }
2112                         }
2113                 }
2114
2115                 if ( wfReadOnly() ) {
2116                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
2117                 } elseif ( $wgUser->isAnon() ) {
2118                         if ( $this->formtype != 'preview' ) {
2119                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
2120                         } else {
2121                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
2122                         }
2123                 } else {
2124                         if ( $this->isCssJsSubpage ) {
2125                                 # Check the skin exists
2126                                 if ( $this->isWrongCaseCssJsPage ) {
2127                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
2128                                 }
2129                                 if ( $this->formtype !== 'preview' ) {
2130                                         if ( $this->isCssSubpage )
2131                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
2132                                         if ( $this->isJsSubpage )
2133                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
2134                                 }
2135                         }
2136                 }
2137
2138                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2139                         # Is the title semi-protected?
2140                         if ( $this->mTitle->isSemiProtected() ) {
2141                                 $noticeMsg = 'semiprotectedpagewarning';
2142                         } else {
2143                                 # Then it must be protected based on static groups (regular)
2144                                 $noticeMsg = 'protectedpagewarning';
2145                         }
2146                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2147                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2148                 }
2149                 if ( $this->mTitle->isCascadeProtected() ) {
2150                         # Is this page under cascading protection from some source pages?
2151                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
2152                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2153                         $cascadeSourcesCount = count( $cascadeSources );
2154                         if ( $cascadeSourcesCount > 0 ) {
2155                                 # Explain, and list the titles responsible
2156                                 foreach( $cascadeSources as $page ) {
2157                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2158                                 }
2159                         }
2160                         $notice .= '</div>';
2161                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2162                 }
2163                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2164                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2165                                 array(  'lim' => 1,
2166                                         'showIfEmpty' => false,
2167                                         'msgKey' => array( 'titleprotectedwarning' ),
2168                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2169                 }
2170
2171                 if ( $this->kblength === false ) {
2172                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2173                 }
2174
2175                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2176                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2177                                 array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
2178                 } else {
2179                         if( !wfMessage('longpage-hint')->isDisabled() ) {
2180                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2181                                         array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
2182                                 );
2183                         }
2184                 }
2185         }
2186
2187         /**
2188          * Standard summary input and label (wgSummary), abstracted so EditPage
2189          * subclasses may reorganize the form.
2190          * Note that you do not need to worry about the label's for=, it will be
2191          * inferred by the id given to the input. You can remove them both by
2192          * passing array( 'id' => false ) to $userInputAttrs.
2193          *
2194          * @param $summary string The value of the summary input
2195          * @param $labelText string The html to place inside the label
2196          * @param $inputAttrs array of attrs to use on the input
2197          * @param $spanLabelAttrs array of attrs to use on the span inside the label
2198          *
2199          * @return array An array in the format array( $label, $input )
2200          */
2201         function getSummaryInput($summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null) {
2202                 //Note: the maxlength is overriden in JS to 250 and to make it use UTF-8 bytes, not characters.
2203                 $inputAttrs = ( is_array($inputAttrs) ? $inputAttrs : array() ) + array(
2204                         'id' => 'wpSummary',
2205                         'maxlength' => '200',
2206                         'tabindex' => '1',
2207                         'size' => 60,
2208                         'spellcheck' => 'true',
2209                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2210
2211                 $spanLabelAttrs = ( is_array($spanLabelAttrs) ? $spanLabelAttrs : array() ) + array(
2212                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2213                         'id' => "wpSummaryLabel"
2214                 );
2215
2216                 $label = null;
2217                 if ( $labelText ) {
2218                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
2219                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2220                 }
2221
2222                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2223
2224                 return array( $label, $input );
2225         }
2226
2227         /**
2228          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2229          *                          up top, or false if this is the comment summary
2230          *                          down below the textarea
2231          * @param $summary String: The text of the summary to display
2232          * @return String
2233          */
2234         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2235                 global $wgOut, $wgContLang;
2236                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2237                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2238                 if ( $isSubjectPreview ) {
2239                         if ( $this->nosummary ) {
2240                                 return;
2241                         }
2242                 } else {
2243                         if ( !$this->mShowSummaryField ) {
2244                                 return;
2245                         }
2246                 }
2247                 $summary = $wgContLang->recodeForEdit( $summary );
2248                 $labelText = wfMsgExt( $isSubjectPreview ? 'subject' : 'summary', 'parseinline' );
2249                 list($label, $input) = $this->getSummaryInput($summary, $labelText, array( 'class' => $summaryClass ), array());
2250                 $wgOut->addHTML("{$label} {$input}");
2251         }
2252
2253         /**
2254          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2255          *                          up top, or false if this is the comment summary
2256          *                          down below the textarea
2257          * @param $summary String: the text of the summary to display
2258          * @return String
2259          */
2260         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2261                 if ( !$summary || ( !$this->preview && !$this->diff ) )
2262                         return "";
2263
2264                 global $wgParser;
2265
2266                 if ( $isSubjectPreview )
2267                         $summary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $summary ) );
2268
2269                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2270
2271                 $summary = wfMsgExt( $message, 'parseinline' ) . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2272                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2273         }
2274
2275         protected function showFormBeforeText() {
2276                 global $wgOut;
2277                 $section = htmlspecialchars( $this->section );
2278                 $wgOut->addHTML( <<<HTML
2279 <input type='hidden' value="{$section}" name="wpSection" />
2280 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2281 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2282 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2283
2284 HTML
2285                 );
2286                 if ( !$this->checkUnicodeCompliantBrowser() )
2287                         $wgOut->addHTML(Html::hidden( 'safemode', '1' ));
2288         }
2289
2290         protected function showFormAfterText() {
2291                 global $wgOut, $wgUser;
2292                 /**
2293                  * To make it harder for someone to slip a user a page
2294                  * which submits an edit form to the wiki without their
2295                  * knowledge, a random token is associated with the login
2296                  * session. If it's not passed back with the submission,
2297                  * we won't save the page, or render user JavaScript and
2298                  * CSS previews.
2299                  *
2300                  * For anon editors, who may not have a session, we just
2301                  * include the constant suffix to prevent editing from
2302                  * broken text-mangling proxies.
2303                  */
2304                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2305         }
2306
2307         /**
2308          * Subpage overridable method for printing the form for page content editing
2309          * By default this simply outputs wpTextbox1
2310          * Subclasses can override this to provide a custom UI for editing;
2311          * be it a form, or simply wpTextbox1 with a modified content that will be
2312          * reverse modified when extracted from the post data.
2313          * Note that this is basically the inverse for importContentFormData
2314          */
2315         protected function showContentForm() {
2316                 $this->showTextbox1();
2317         }
2318
2319         /**
2320          * Method to output wpTextbox1
2321          * The $textoverride method can be used by subclasses overriding showContentForm
2322          * to pass back to this method.
2323          *
2324          * @param $customAttribs An array of html attributes to use in the textarea
2325          * @param $textoverride String: optional text to override $this->textarea1 with
2326          */
2327         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2328                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2329                         $attribs = array( 'style' => 'display:none;' );
2330                 } else {
2331                         $classes = array(); // Textarea CSS
2332                         if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2333                                 # Is the title semi-protected?
2334                                 if ( $this->mTitle->isSemiProtected() ) {
2335                                         $classes[] = 'mw-textarea-sprotected';
2336                                 } else {
2337                                         # Then it must be protected based on static groups (regular)
2338                                         $classes[] = 'mw-textarea-protected';
2339                                 }
2340                                 # Is the title cascade-protected?
2341                                 if ( $this->mTitle->isCascadeProtected() ) {
2342                                         $classes[] = 'mw-textarea-cprotected';
2343                                 }
2344                         }
2345
2346                         $attribs = array( 'tabindex' => 1 );
2347
2348                         if ( is_array( $customAttribs ) ) {
2349                                 $attribs += $customAttribs;
2350                         }
2351
2352                         if ( count( $classes ) ) {
2353                                 if ( isset( $attribs['class'] ) ) {
2354                                         $classes[] = $attribs['class'];
2355                                 }
2356                                 $attribs['class'] = implode( ' ', $classes );
2357                         }
2358                 }
2359
2360                 $this->showTextbox( $textoverride !== null ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
2361         }
2362
2363         protected function showTextbox2() {
2364                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2365         }
2366
2367         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2368                 global $wgOut, $wgUser;
2369
2370                 $wikitext = $this->safeUnicodeOutput( $text );
2371                 if ( strval($wikitext) !== '' ) {
2372                         // Ensure there's a newline at the end, otherwise adding lines
2373                         // is awkward.
2374                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2375                         // mode will show an extra newline. A bit annoying.
2376                         $wikitext .= "\n";
2377                 }
2378
2379                 $attribs = $customAttribs + array(
2380                         'accesskey' => ',',
2381                         'id'   => $name,
2382                         'cols' => $wgUser->getIntOption( 'cols' ),
2383                         'rows' => $wgUser->getIntOption( 'rows' ),
2384                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
2385                 );
2386
2387                 $pageLang = $this->mTitle->getPageLanguage();
2388                 $attribs['lang'] = $pageLang->getCode();
2389                 $attribs['dir'] = $pageLang->getDir();
2390
2391                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2392         }
2393
2394         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2395                 global $wgOut;
2396                 $classes = array();
2397                 if ( $isOnTop )
2398                         $classes[] = 'ontop';
2399
2400                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2401
2402                 if ( $this->formtype != 'preview' )
2403                         $attribs['style'] = 'display: none;';
2404
2405                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2406
2407                 if ( $this->formtype == 'preview' ) {
2408                         $this->showPreview( $previewOutput );
2409                 }
2410
2411                 $wgOut->addHTML( '</div>' );
2412
2413                 if ( $this->formtype == 'diff') {
2414                         $this->showDiff();
2415                 }
2416         }
2417
2418         /**
2419          * Append preview output to $wgOut.
2420          * Includes category rendering if this is a category page.
2421          *
2422          * @param $text String: the HTML to be output for the preview.
2423          */
2424         protected function showPreview( $text ) {
2425                 global $wgOut;
2426                 if ( $this->mTitle->getNamespace() == NS_CATEGORY) {
2427                         $this->mArticle->openShowCategory();
2428                 }
2429                 # This hook seems slightly odd here, but makes things more
2430                 # consistent for extensions.
2431                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
2432                 $wgOut->addHTML( $text );
2433                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2434                         $this->mArticle->closeShowCategory();
2435                 }
2436         }
2437
2438         /**
2439          * Get a diff between the current contents of the edit box and the
2440          * version of the page we're editing from.
2441          *
2442          * If this is a section edit, we'll replace the section as for final
2443          * save and then make a comparison.
2444          */
2445         function showDiff() {
2446                 global $wgUser, $wgContLang, $wgOut;
2447
2448                 $oldContent = $this->getOriginalContent();
2449
2450                 $textboxContent = ContentHandler::makeContent( $this->textbox1, $this->getTitle(),
2451                                                                                                                 $this->content_model, $this->content_format ); #XXX: handle parse errors ?
2452
2453                 $newContent = $this->mArticle->replaceSectionContent(
2454                                                                                         $this->section, $textboxContent,
2455                                                                                         $this->summary, $this->edittime );
2456
2457                 # hanlde legacy text-based hook
2458                 $newtext_orig = $newContent->serialize( $this->content_format );
2459                 $newtext = $newtext_orig; #clone
2460                 wfRunHooks( 'EditPageGetDiffText', array( $this, &$newtext ) );
2461
2462                 if ( $newtext != $newtext_orig ) {
2463                         #if the hook changed the text, create a new Content object accordingly.
2464                         $newContent = ContentHandler::makeContent( $newtext, $this->getTitle(), $newContent->getModelName() ); #XXX: handle parse errors ?
2465                 }
2466
2467                 wfRunHooks( 'EditPageGetDiffContent', array( $this, &$newContent ) ); #FIXME: document new hook
2468
2469                 $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
2470                 $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
2471
2472                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
2473                         $oldtitle = wfMsgExt( 'currentrev', array( 'parseinline' ) );
2474                         $newtitle = wfMsgExt( 'yourtext', array( 'parseinline' ) );
2475
2476                         $de = $oldContent->getContentHandler()->getDifferenceEngine( $this->mArticle->getContext() );
2477                         $de->setContent( $oldContent, $newContent );
2478
2479                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2480                         $de->showDiffStyle();
2481                 } else {
2482                         $difftext = '';
2483                 }
2484
2485                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2486         }
2487
2488         /**
2489          * Give a chance for site and per-namespace customizations of
2490          * terms of service summary link that might exist separately
2491          * from the copyright notice.
2492          *
2493          * This will display between the save button and the edit tools,
2494          * so should remain short!
2495          */
2496         protected function showTosSummary() {
2497                 $msg = 'editpage-tos-summary';
2498                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
2499                 if( !wfMessage( $msg )->isDisabled() ) {
2500                         global $wgOut;
2501                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
2502                         $wgOut->addWikiMsg( $msg );
2503                         $wgOut->addHTML( '</div>' );
2504                 }
2505         }
2506
2507         protected function showEditTools() {
2508                 global $wgOut;
2509                 $wgOut->addHTML( '<div class="mw-editTools">' .
2510                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
2511                         '</div>' );
2512         }
2513
2514         protected function getCopywarn() {
2515                 global $wgRightsText;
2516                 if ( $wgRightsText ) {
2517                         $copywarnMsg = array( 'copyrightwarning',
2518                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
2519                                 $wgRightsText );
2520                 } else {
2521                         $copywarnMsg = array( 'copyrightwarning2',
2522                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
2523                 }
2524                 // Allow for site and per-namespace customization of contribution/copyright notice.
2525                 wfRunHooks( 'EditPageCopyrightWarning', array( $this->mTitle, &$copywarnMsg ) );
2526
2527                 return "<div id=\"editpage-copywarn\">\n" .
2528                         call_user_func_array("wfMsgNoTrans", $copywarnMsg) . "\n</div>";
2529         }
2530
2531         protected function showStandardInputs( &$tabindex = 2 ) {
2532                 global $wgOut;
2533                 $wgOut->addHTML( "<div class='editOptions'>\n" );
2534
2535                 if ( $this->section != 'new' ) {
2536                         $this->showSummaryInput( false, $this->summary );
2537                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
2538                 }
2539
2540                 $checkboxes = $this->getCheckboxes( $tabindex,
2541                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
2542                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
2543                 $wgOut->addHTML( "<div class='editButtons'>\n" );
2544                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
2545
2546                 $cancel = $this->getCancelLink();
2547                 if ( $cancel !== '' ) {
2548                         $cancel .= wfMsgExt( 'pipe-separator' , 'escapenoentities' );
2549                 }
2550                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ) );
2551                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
2552                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
2553                         htmlspecialchars( wfMsg( 'newwindow' ) );
2554                 $wgOut->addHTML( "      <span class='editHelp'>{$cancel}{$edithelp}</span>\n" );
2555                 $wgOut->addHTML( "</div><!-- editButtons -->\n</div><!-- editOptions -->\n" );
2556         }
2557
2558         /**
2559          * Show an edit conflict. textbox1 is already shown in showEditForm().
2560          * If you want to use another entry point to this function, be careful.
2561          */
2562         protected function showConflict() {
2563                 global $wgOut;
2564
2565                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
2566                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2567
2568                         $content1 = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format ); #XXX: handle parse errors?
2569                         $content2 = ContentHandler::makeContent( $this->textbox2, $this->getTitle(), $this->content_model, $this->content_format ); #XXX: handle parse errors?
2570
2571                         $handler = ContentHandler::getForModelName( $this->content_model );
2572                         $de = $handler->getDifferenceEngine( $this->mArticle->getContext() );
2573                         $de->setContent( $content2, $content1 );
2574                         $de->showDiff( wfMsgExt( 'yourtext', 'parseinline' ), wfMsg( 'storedversion' ) );
2575
2576                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2577                         $this->showTextbox2();
2578                 }
2579         }
2580
2581         /**
2582          * @return string
2583          */
2584         public function getCancelLink() {
2585                 $cancelParams = array();
2586                 if ( !$this->isConflict && $this->oldid > 0 ) {
2587                         $cancelParams['oldid'] = $this->oldid;
2588                 }
2589
2590                 return Linker::linkKnown(
2591                         $this->getContextTitle(),
2592                         wfMsgExt( 'cancel', array( 'parseinline' ) ),
2593                         array( 'id' => 'mw-editform-cancel' ),
2594                         $cancelParams
2595                 );
2596         }
2597
2598         /**
2599          * Returns the URL to use in the form's action attribute.
2600          * This is used by EditPage subclasses when simply customizing the action
2601          * variable in the constructor is not enough. This can be used when the
2602          * EditPage lives inside of a Special page rather than a custom page action.
2603          *
2604          * @param $title Title object for which is being edited (where we go to for &action= links)
2605          * @return string
2606          */
2607         protected function getActionURL( Title $title ) {
2608                 return $title->getLocalURL( array( 'action' => $this->action ) );
2609         }
2610
2611         /**
2612          * Check if a page was deleted while the user was editing it, before submit.
2613          * Note that we rely on the logging table, which hasn't been always there,
2614          * but that doesn't matter, because this only applies to brand new
2615          * deletes.
2616          */
2617         protected function wasDeletedSinceLastEdit() {
2618                 if ( $this->deletedSinceEdit !== null ) {
2619                         return $this->deletedSinceEdit;
2620                 }
2621
2622                 $this->deletedSinceEdit = false;
2623
2624                 if ( $this->mTitle->isDeletedQuick() ) {
2625                         $this->lastDelete = $this->getLastDelete();
2626                         if ( $this->lastDelete ) {
2627                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
2628                                 if ( $deleteTime > $this->starttime ) {
2629                                         $this->deletedSinceEdit = true;
2630                                 }
2631                         }
2632                 }
2633
2634                 return $this->deletedSinceEdit;
2635         }
2636
2637         protected function getLastDelete() {
2638                 $dbr = wfGetDB( DB_SLAVE );
2639                 $data = $dbr->selectRow(
2640                         array( 'logging', 'user' ),
2641                         array( 'log_type',
2642                                    'log_action',
2643                                    'log_timestamp',
2644                                    'log_user',
2645                                    'log_namespace',
2646                                    'log_title',
2647                                    'log_comment',
2648                                    'log_params',
2649                                    'log_deleted',
2650                                    'user_name' ),
2651                         array( 'log_namespace' => $this->mTitle->getNamespace(),
2652                                    'log_title' => $this->mTitle->getDBkey(),
2653                                    'log_type' => 'delete',
2654                                    'log_action' => 'delete',
2655                                    'user_id=log_user' ),
2656                         __METHOD__,
2657                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
2658                 );
2659                 // Quick paranoid permission checks...
2660                 if( is_object( $data ) ) {
2661                         if( $data->log_deleted & LogPage::DELETED_USER )
2662                                 $data->user_name = wfMsgHtml( 'rev-deleted-user' );
2663                         if( $data->log_deleted & LogPage::DELETED_COMMENT )
2664                                 $data->log_comment = wfMsgHtml( 'rev-deleted-comment' );
2665                 }
2666                 return $data;
2667         }
2668
2669         /**
2670          * Get the rendered text for previewing.
2671          * @return string
2672          */
2673         function getPreviewText() {
2674                 global $wgOut, $wgUser, $wgParser, $wgRawHtml;
2675
2676                 wfProfileIn( __METHOD__ );
2677
2678                 if ( $wgRawHtml && !$this->mTokenOk ) {
2679                         // Could be an offsite preview attempt. This is very unsafe if
2680                         // HTML is enabled, as it could be an attack.
2681                         $parsedNote = '';
2682                         if ( $this->textbox1 !== '' ) {
2683                                 // Do not put big scary notice, if previewing the empty
2684                                 // string, which happens when you initially edit
2685                                 // a category page, due to automatic preview-on-open.
2686                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
2687                                         wfMsg( 'session_fail_preview_html' ) . "</div>", true, /* interface */true );
2688                         }
2689                         wfProfileOut( __METHOD__ );
2690                         return $parsedNote;
2691                 }
2692
2693         try {
2694             $content = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format );
2695
2696             if ( $this->mTriedSave && !$this->mTokenOk ) {
2697                 if ( $this->mTokenOkExceptSuffix ) {
2698                     $note = wfMsg( 'token_suffix_mismatch' );
2699                 } else {
2700                     $note = wfMsg( 'session_fail_preview' );
2701                 }
2702             } elseif ( $this->incompleteForm ) {
2703                 $note = wfMsg( 'edit_form_incomplete' );
2704             } elseif ( $this->isCssJsSubpage || $this->mTitle->isCssOrJsPage() ) {
2705                 # if this is a CSS or JS page used in the UI, show a special notice
2706                 # 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?
2707
2708                 if( $this->mTitle->isCssJsSubpage() ) {
2709                     $level = 'user';
2710                 } elseif( $this->mTitle->isCssOrJsPage() ) {
2711                     $level = 'site';
2712                 } else {
2713                     $level = false;
2714                 }
2715
2716                 if ( $content->getModelName() == CONTENT_MODEL_CSS ) {
2717                     $format = 'css';
2718                 } elseif ( $content->getModelName() == CONTENT_MODEL_JAVASCRIPT ) {
2719                     $format = 'js';
2720                 } else {
2721                     $format = false;
2722                 }
2723
2724                 # Used messages to make sure grep find them:
2725                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
2726                 if( $level && $format ) {
2727                     $note = "<div id='mw-{$level}{$format}preview'>" . wfMsg( "{$level}{$format}preview" ) . "</div>";
2728                 } else {
2729                     $note = wfMsg( 'previewnote' );
2730                 }
2731             } else {
2732                 $note = wfMsg( 'previewnote' );
2733             }
2734
2735             $parserOptions = ParserOptions::newFromUser( $wgUser );
2736             $parserOptions->setEditSection( false );
2737             $parserOptions->setTidy( true );
2738             $parserOptions->setIsPreview( true );
2739             $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
2740
2741             $rt = $content->getRedirectChain();
2742
2743             if ( $rt ) {
2744                 $previewHTML = $this->mArticle->viewRedirect( $rt, false );
2745             } else {
2746
2747                 # If we're adding a comment, we need to show the
2748                 # summary as the headline
2749                 if ( $this->section == "new" && $this->summary != "" ) {
2750                     $content = $content->addSectionHeader( $this->summary );
2751                 }
2752
2753                 $toparse_orig = $content->serialize( $this->content_format );
2754                 $toparse = $toparse_orig;
2755                 wfRunHooks( 'EditPageGetPreviewText', array( $this, &$toparse ) );
2756
2757                 if ( $toparse !== $toparse_orig ) {
2758                     #hook changed the text, create new Content object
2759                     $content = ContentHandler::makeContent( $toparse, $this->getTitle(), $this->content_model, $this->content_format );
2760                 }
2761
2762                 wfRunHooks( 'EditPageGetPreviewContent', array( $this, &$content ) ); # FIXME: document new hook
2763
2764                 $parserOptions->enableLimitReport();
2765
2766                 #XXX: For CSS/JS pages, we should have called the ShowRawCssJs hook here. But it's now deprecated, so never mind
2767                 $content = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
2768                 $parserOutput = $content->getParserOutput( $this->mTitle, null, $parserOptions );
2769
2770                 $previewHTML = $parserOutput->getText();
2771                 $this->mParserOutput = $parserOutput;
2772                 $wgOut->addParserOutputNoText( $parserOutput );
2773
2774                 if ( count( $parserOutput->getWarnings() ) ) {
2775                     $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
2776                 }
2777             }
2778         } catch (MWContentSerializationException $ex) {
2779             $note .= "\n\n" . wfMsg('content-failed-to-parse', $this->content_model, $this->content_format, $ex->getMessage() );
2780             $previewHTML = '';
2781         }
2782
2783                 if( $this->isConflict ) {
2784                         $conflict = '<h2 id="mw-previewconflict">' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
2785                 } else {
2786                         $conflict = '<hr />';
2787                 }
2788
2789                 $previewhead = "<div class='previewnote'>\n" .
2790                         '<h2 id="mw-previewheader">' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>" .
2791                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
2792
2793                 $pageLang = $this->mTitle->getPageLanguage();
2794                 $attribs = array( 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
2795                         'class' => 'mw-content-'.$pageLang->getDir() );
2796                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
2797
2798                 wfProfileOut( __METHOD__ );
2799                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
2800         }
2801
2802         /**
2803          * @return Array
2804          */
2805         function getTemplates() {
2806                 if ( $this->preview || $this->section != '' ) {
2807                         $templates = array();
2808                         if ( !isset( $this->mParserOutput ) ) {
2809                                 return $templates;
2810                         }
2811                         foreach( $this->mParserOutput->getTemplates() as $ns => $template) {
2812                                 foreach( array_keys( $template ) as $dbk ) {
2813                                         $templates[] = Title::makeTitle($ns, $dbk);
2814                                 }
2815                         }
2816                         return $templates;
2817                 } else {
2818                         return $this->mTitle->getTemplateLinksFrom();
2819                 }
2820         }
2821
2822         /**
2823          * Shows a bulletin board style toolbar for common editing functions.
2824          * It can be disabled in the user preferences.
2825          * The necessary JavaScript code can be found in skins/common/edit.js.
2826          *
2827          * @return string
2828          */
2829         static function getEditToolbar() {
2830                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
2831                 global $wgUseTeX, $wgEnableUploads, $wgForeignFileRepos;
2832
2833                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
2834
2835                 /**
2836                  * $toolarray is an array of arrays each of which includes the
2837                  * filename of the button image (without path), the opening
2838                  * tag, the closing tag, optionally a sample text that is
2839                  * inserted between the two when no selection is highlighted
2840                  * and.  The tip text is shown when the user moves the mouse
2841                  * over the button.
2842                  *
2843                  * Also here: accesskeys (key), which are not used yet until
2844                  * someone can figure out a way to make them work in
2845                  * IE. However, we should make sure these keys are not defined
2846                  * on the edit page.
2847                  */
2848                 $toolarray = array(
2849                         array(
2850                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
2851                                 'id'     => 'mw-editbutton-bold',
2852                                 'open'   => '\'\'\'',
2853                                 'close'  => '\'\'\'',
2854                                 'sample' => wfMsg( 'bold_sample' ),
2855                                 'tip'    => wfMsg( 'bold_tip' ),
2856                                 'key'    => 'B'
2857                         ),
2858                         array(
2859                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
2860                                 'id'     => 'mw-editbutton-italic',
2861                                 'open'   => '\'\'',
2862                                 'close'  => '\'\'',
2863                                 'sample' => wfMsg( 'italic_sample' ),
2864                                 'tip'    => wfMsg( 'italic_tip' ),
2865                                 'key'    => 'I'
2866                         ),
2867                         array(
2868                                 'image'  => $wgLang->getImageFile( 'button-link' ),
2869                                 'id'     => 'mw-editbutton-link',
2870                                 'open'   => '[[',
2871                                 'close'  => ']]',
2872                                 'sample' => wfMsg( 'link_sample' ),
2873                                 'tip'    => wfMsg( 'link_tip' ),
2874                                 'key'    => 'L'
2875                         ),
2876                         array(
2877                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
2878                                 'id'     => 'mw-editbutton-extlink',
2879                                 'open'   => '[',
2880                                 'close'  => ']',
2881                                 'sample' => wfMsg( 'extlink_sample' ),
2882                                 'tip'    => wfMsg( 'extlink_tip' ),
2883                                 'key'    => 'X'
2884                         ),
2885                         array(
2886                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
2887                                 'id'     => 'mw-editbutton-headline',
2888                                 'open'   => "\n== ",
2889                                 'close'  => " ==\n",
2890                                 'sample' => wfMsg( 'headline_sample' ),
2891                                 'tip'    => wfMsg( 'headline_tip' ),
2892                                 'key'    => 'H'
2893                         ),
2894                         $imagesAvailable ? array(
2895                                 'image'  => $wgLang->getImageFile( 'button-image' ),
2896                                 'id'     => 'mw-editbutton-image',
2897                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
2898                                 'close'  => ']]',
2899                                 'sample' => wfMsg( 'image_sample' ),
2900                                 'tip'    => wfMsg( 'image_tip' ),
2901                                 'key'    => 'D',
2902                         ) : false,
2903                         $imagesAvailable ? array(
2904                                 'image'  => $wgLang->getImageFile( 'button-media' ),
2905                                 'id'     => 'mw-editbutton-media',
2906                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
2907                                 'close'  => ']]',
2908                                 'sample' => wfMsg( 'media_sample' ),
2909                                 'tip'    => wfMsg( 'media_tip' ),
2910                                 'key'    => 'M'
2911                         ) : false,
2912                         $wgUseTeX ?     array(
2913                                 'image'  => $wgLang->getImageFile( 'button-math' ),
2914                                 'id'     => 'mw-editbutton-math',
2915                                 'open'   => "<math>",
2916                                 'close'  => "</math>",
2917                                 'sample' => wfMsg( 'math_sample' ),
2918                                 'tip'    => wfMsg( 'math_tip' ),
2919                                 'key'    => 'C'
2920                         ) : false,
2921                         array(
2922                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
2923                                 'id'     => 'mw-editbutton-nowiki',
2924                                 'open'   => "<nowiki>",
2925                                 'close'  => "</nowiki>",
2926                                 'sample' => wfMsg( 'nowiki_sample' ),
2927                                 'tip'    => wfMsg( 'nowiki_tip' ),
2928                                 'key'    => 'N'
2929                         ),
2930                         array(
2931                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
2932                                 'id'     => 'mw-editbutton-signature',
2933                                 'open'   => '--~~~~',
2934                                 'close'  => '',
2935                                 'sample' => '',
2936                                 'tip'    => wfMsg( 'sig_tip' ),
2937                                 'key'    => 'Y'
2938                         ),
2939                         array(
2940                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
2941                                 'id'     => 'mw-editbutton-hr',
2942                                 'open'   => "\n----\n",
2943                                 'close'  => '',
2944                                 'sample' => '',
2945                                 'tip'    => wfMsg( 'hr_tip' ),
2946                                 'key'    => 'R'
2947                         )
2948                 );
2949
2950                 $script = 'mw.loader.using("mediawiki.action.edit", function() {';
2951                 foreach ( $toolarray as $tool ) {
2952                         if ( !$tool ) {
2953                                 continue;
2954                         }
2955
2956                         $params = array(
2957                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
2958                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
2959                                 // Older browsers show a "speedtip" type message only for ALT.
2960                                 // Ideally these should be different, realistically they
2961                                 // probably don't need to be.
2962                                 $tip = $tool['tip'],
2963                                 $open = $tool['open'],
2964                                 $close = $tool['close'],
2965                                 $sample = $tool['sample'],
2966                                 $cssId = $tool['id'],
2967                         );
2968
2969                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
2970                 }
2971
2972                 // This used to be called on DOMReady from mediawiki.action.edit, which
2973                 // ended up causing race conditions with the setup code above.
2974                 $script .= "\n" .
2975                         "// Create button bar\n" .
2976                         "$(function() { mw.toolbar.init(); } );\n";
2977
2978                 $script .= '});';
2979                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
2980
2981                 $toolbar = '<div id="toolbar"></div>';
2982
2983                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
2984
2985                 return $toolbar;
2986         }
2987
2988         /**
2989          * Returns an array of html code of the following checkboxes:
2990          * minor and watch
2991          *
2992          * @param $tabindex Current tabindex
2993          * @param $checked Array of checkbox => bool, where bool indicates the checked
2994          *                 status of the checkbox
2995          *
2996          * @return array
2997          */
2998         public function getCheckboxes( &$tabindex, $checked ) {
2999                 global $wgUser;
3000
3001                 $checkboxes = array();
3002
3003                 // don't show the minor edit checkbox if it's a new page or section
3004                 if ( !$this->isNew ) {
3005                         $checkboxes['minor'] = '';
3006                         $minorLabel = wfMsgExt( 'minoredit', array( 'parseinline' ) );
3007                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3008                                 $attribs = array(
3009                                         'tabindex'  => ++$tabindex,
3010                                         'accesskey' => wfMsg( 'accesskey-minoredit' ),
3011                                         'id'        => 'wpMinoredit',
3012                                 );
3013                                 $checkboxes['minor'] =
3014                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3015                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3016                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3017                                         ">{$minorLabel}</label>";
3018                         }
3019                 }
3020
3021                 $watchLabel = wfMsgExt( 'watchthis', array( 'parseinline' ) );
3022                 $checkboxes['watch'] = '';
3023                 if ( $wgUser->isLoggedIn() ) {
3024                         $attribs = array(
3025                                 'tabindex'  => ++$tabindex,
3026                                 'accesskey' => wfMsg( 'accesskey-watch' ),
3027                                 'id'        => 'wpWatchthis',
3028                         );
3029                         $checkboxes['watch'] =
3030                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3031                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3032                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3033                                 ">{$watchLabel}</label>";
3034                 }
3035                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3036                 return $checkboxes;
3037         }
3038
3039         /**
3040          * Returns an array of html code of the following buttons:
3041          * save, diff, preview and live
3042          *
3043          * @param $tabindex Current tabindex
3044          *
3045          * @return array
3046          */
3047         public function getEditButtons( &$tabindex ) {
3048                 $buttons = array();
3049
3050                 $temp = array(
3051                         'id'        => 'wpSave',
3052                         'name'      => 'wpSave',
3053                         'type'      => 'submit',
3054                         'tabindex'  => ++$tabindex,
3055                         'value'     => wfMsg( 'savearticle' ),
3056                         'accesskey' => wfMsg( 'accesskey-save' ),
3057                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
3058                 );
3059                 $buttons['save'] = Xml::element('input', $temp, '');
3060
3061                 ++$tabindex; // use the same for preview and live preview
3062                 $temp = array(
3063                         'id'        => 'wpPreview',
3064                         'name'      => 'wpPreview',
3065                         'type'      => 'submit',
3066                         'tabindex'  => $tabindex,
3067                         'value'     => wfMsg( 'showpreview' ),
3068                         'accesskey' => wfMsg( 'accesskey-preview' ),
3069                         'title'     => wfMsg( 'tooltip-preview' ) . ' [' . wfMsg( 'accesskey-preview' ) . ']',
3070                 );
3071                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
3072                 $buttons['live'] = '';
3073
3074                 $temp = array(
3075                         'id'        => 'wpDiff',
3076                         'name'      => 'wpDiff',
3077                         'type'      => 'submit',
3078                         'tabindex'  => ++$tabindex,
3079                         'value'     => wfMsg( 'showdiff' ),
3080                         'accesskey' => wfMsg( 'accesskey-diff' ),
3081                         'title'     => wfMsg( 'tooltip-diff' ) . ' [' . wfMsg( 'accesskey-diff' ) . ']',
3082                 );
3083                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
3084
3085                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3086                 return $buttons;
3087         }
3088
3089         /**
3090          * Output preview text only. This can be sucked into the edit page
3091          * via JavaScript, and saves the server time rendering the skin as
3092          * well as theoretically being more robust on the client (doesn't
3093          * disturb the edit box's undo history, won't eat your text on
3094          * failure, etc).
3095          *
3096          * @todo This doesn't include category or interlanguage links.
3097          *       Would need to enhance it a bit, <s>maybe wrap them in XML
3098          *       or something...</s> that might also require more skin
3099          *       initialization, so check whether that's a problem.
3100          */
3101         function livePreview() {
3102                 global $wgOut;
3103                 $wgOut->disable();
3104                 header( 'Content-type: text/xml; charset=utf-8' );
3105                 header( 'Cache-control: no-cache' );
3106
3107                 $previewText = $this->getPreviewText();
3108                 #$categories = $skin->getCategoryLinks();
3109
3110                 $s =
3111                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3112                 Xml::tags( 'livepreview', null,
3113                         Xml::element( 'preview', null, $previewText )
3114                         #.      Xml::element( 'category', null, $categories )
3115                 );
3116                 echo $s;
3117         }
3118
3119         /**
3120          * Call the stock "user is blocked" page
3121          *
3122          * @deprecated in 1.19; throw an exception directly instead
3123          */
3124         function blockedPage() {
3125                 wfDeprecated( __METHOD__, '1.19' );
3126                 global $wgUser;
3127
3128                 throw new UserBlockedError( $wgUser->mBlock );
3129         }
3130
3131         /**
3132          * Produce the stock "please login to edit pages" page
3133          *
3134          * @deprecated in 1.19; throw an exception directly instead
3135          */
3136         function userNotLoggedInPage() {
3137                 wfDeprecated( __METHOD__, '1.19' );
3138                 throw new PermissionsError( 'edit' );
3139         }
3140
3141         /**
3142          * Show an error page saying to the user that he has insufficient permissions
3143          * to create a new page
3144          *
3145          * @deprecated in 1.19; throw an exception directly instead
3146          */
3147         function noCreatePermission() {
3148                 wfDeprecated( __METHOD__, '1.19' );
3149                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
3150                 throw new PermissionsError( $permission );
3151         }
3152
3153         /**
3154          * Creates a basic error page which informs the user that
3155          * they have attempted to edit a nonexistent section.
3156          */
3157         function noSuchSectionPage() {
3158                 global $wgOut;
3159
3160                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3161
3162                 $res = wfMsgExt( 'nosuchsectiontext', 'parse', $this->section );
3163                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
3164                 $wgOut->addHTML( $res );
3165
3166                 $wgOut->returnToMain( false, $this->mTitle );
3167         }
3168
3169         /**
3170          * Produce the stock "your edit contains spam" page
3171          *
3172          * @param $match Text which triggered one or more filters
3173          * @deprecated since 1.17 Use method spamPageWithContent() instead
3174          */
3175         static function spamPage( $match = false ) {
3176                 wfDeprecated( __METHOD__, '1.17' );
3177
3178                 global $wgOut, $wgTitle;
3179
3180                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3181
3182                 $wgOut->addHTML( '<div id="spamprotected">' );
3183                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3184                 if ( $match ) {
3185                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3186                 }
3187                 $wgOut->addHTML( '</div>' );
3188
3189                 $wgOut->returnToMain( false, $wgTitle );
3190         }
3191
3192         /**
3193          * Show "your edit contains spam" page with your diff and text
3194          *
3195          * @param $match Text which triggered one or more filters
3196          */
3197         public function spamPageWithContent( $match = false ) {
3198                 global $wgOut;
3199                 $this->textbox2 = $this->textbox1;
3200
3201                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3202
3203                 $wgOut->addHTML( '<div id="spamprotected">' );
3204                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3205                 if ( $match ) {
3206                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3207                 }
3208                 $wgOut->addHTML( '</div>' );
3209
3210                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3211
3212                 $handler = ContentHandler::getForTitle( $this->getTitle() );
3213                 $de = $handler->getDifferenceEngine( $this->mArticle->getContext() );
3214
3215                 $content2 = ContentHandler::makeContent( $this->textbox2, $this->getTitle(), $this->content_model, $this->content_format ); #XXX: handle parse errors?
3216                 $de->setContent( $this->getCurrentContent(), $content2 );
3217
3218                 $de->showDiff( wfMsg( "storedversion" ), wfMsgExt( 'yourtext', 'parseinline' ) );
3219
3220                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3221                 $this->showTextbox2();
3222
3223                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3224         }
3225
3226         /**
3227          * Format an anchor fragment as it would appear for a given section name
3228          * @param $text String
3229          * @return String
3230          * @private
3231          */
3232         function sectionAnchor( $text ) {
3233                 global $wgParser;
3234                 return $wgParser->guessSectionNameFromWikiText( $text );
3235         }
3236
3237         /**
3238          * Check if the browser is on a blacklist of user-agents known to
3239          * mangle UTF-8 data on form submission. Returns true if Unicode
3240          * should make it through, false if it's known to be a problem.
3241          * @return bool
3242          * @private
3243          */
3244         function checkUnicodeCompliantBrowser() {
3245                 global $wgBrowserBlackList;
3246                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
3247                         // No User-Agent header sent? Trust it by default...
3248                         return true;
3249                 }
3250                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
3251                 foreach ( $wgBrowserBlackList as $browser ) {
3252                         if ( preg_match($browser, $currentbrowser) ) {
3253                                 return false;
3254                         }
3255                 }
3256                 return true;
3257         }
3258
3259         /**
3260          * Filter an input field through a Unicode de-armoring process if it
3261          * came from an old browser with known broken Unicode editing issues.
3262          *
3263          * @param $request WebRequest
3264          * @param $field String
3265          * @return String
3266          * @private
3267          */
3268         function safeUnicodeInput( $request, $field ) {
3269                 $text = rtrim( $request->getText( $field ) );
3270                 return $request->getBool( 'safemode' )
3271                         ? $this->unmakesafe( $text )
3272                         : $text;
3273         }
3274
3275         /**
3276          * @param $request WebRequest
3277          * @param $text string
3278          * @return string
3279          */
3280         function safeUnicodeText( $request, $text ) {
3281                 $text = rtrim( $text );
3282                 return $request->getBool( 'safemode' )
3283                         ? $this->unmakesafe( $text )
3284                         : $text;
3285         }
3286
3287         /**
3288          * Filter an output field through a Unicode armoring process if it is
3289          * going to an old browser with known broken Unicode editing issues.
3290          *
3291          * @param $text String
3292          * @return String
3293          * @private
3294          */
3295         function safeUnicodeOutput( $text ) {
3296                 global $wgContLang;
3297                 $codedText = $wgContLang->recodeForEdit( $text );
3298                 return $this->checkUnicodeCompliantBrowser()
3299                         ? $codedText
3300                         : $this->makesafe( $codedText );
3301         }
3302
3303         /**
3304          * A number of web browsers are known to corrupt non-ASCII characters
3305          * in a UTF-8 text editing environment. To protect against this,
3306          * detected browsers will be served an armored version of the text,
3307          * with non-ASCII chars converted to numeric HTML character references.
3308          *
3309          * Preexisting such character references will have a 0 added to them
3310          * to ensure that round-trips do not alter the original data.
3311          *
3312          * @param $invalue String
3313          * @return String
3314          * @private
3315          */
3316         function makesafe( $invalue ) {
3317                 // Armor existing references for reversability.
3318                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
3319
3320                 $bytesleft = 0;
3321                 $result = "";
3322                 $working = 0;
3323                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
3324                         $bytevalue = ord( $invalue[$i] );
3325                         if ( $bytevalue <= 0x7F ) { //0xxx xxxx
3326                                 $result .= chr( $bytevalue );
3327                                 $bytesleft = 0;
3328                         } elseif ( $bytevalue <= 0xBF ) { //10xx xxxx
3329                                 $working = $working << 6;
3330                                 $working += ($bytevalue & 0x3F);
3331                                 $bytesleft--;
3332                                 if ( $bytesleft <= 0 ) {
3333                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3334                                 }
3335                         } elseif ( $bytevalue <= 0xDF ) { //110x xxxx
3336                                 $working = $bytevalue & 0x1F;
3337                                 $bytesleft = 1;
3338                         } elseif ( $bytevalue <= 0xEF ) { //1110 xxxx
3339                                 $working = $bytevalue & 0x0F;
3340                                 $bytesleft = 2;
3341                         } else { //1111 0xxx
3342                                 $working = $bytevalue & 0x07;
3343                                 $bytesleft = 3;
3344                         }
3345                 }
3346                 return $result;
3347         }
3348
3349         /**
3350          * Reverse the previously applied transliteration of non-ASCII characters
3351          * back to UTF-8. Used to protect data from corruption by broken web browsers
3352          * as listed in $wgBrowserBlackList.
3353          *
3354          * @param $invalue String
3355          * @return String
3356          * @private
3357          */
3358         function unmakesafe( $invalue ) {
3359                 $result = "";
3360                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
3361                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i+3] != '0' ) ) {
3362                                 $i += 3;
3363                                 $hexstring = "";
3364                                 do {
3365                                         $hexstring .= $invalue[$i];
3366                                         $i++;
3367                                 } while( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
3368
3369                                 // Do some sanity checks. These aren't needed for reversability,
3370                                 // but should help keep the breakage down if the editor
3371                                 // breaks one of the entities whilst editing.
3372                                 if ( (substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6) ) {
3373                                         $codepoint = hexdec($hexstring);
3374                                         $result .= codepointToUtf8( $codepoint );
3375                                 } else {
3376                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
3377                                 }
3378                         } else {
3379                                 $result .= substr( $invalue, $i, 1 );
3380                         }
3381                 }
3382                 // reverse the transform that we made for reversability reasons.
3383                 return strtr( $result, array( "&#x0" => "&#x" ) );
3384         }
3385 }