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          * HTML id and name for the beginning of the edit form.
 154          */
 155         const EDITFORM_ID                  = 'editform';
 156
 157         /**
 158          * @var Article
 159          */
 160         var $mArticle;
 161
 162         /**
 163          * @var Title
 164          */
 165         var $mTitle;
 166         private $mContextTitle = null;
 167         var $action = 'submit';
 168         var $isConflict = false;
 169         var $isCssJsSubpage = false;
 170         var $isCssSubpage = false;
 171         var $isJsSubpage = false;
 172         var $isWrongCaseCssJsPage = false;
 173         var $isNew = false; // new page or new section
 174         var $deletedSinceEdit;
 175         var $formtype;
 176         var $firsttime;
 177         var $lastDelete;
 178         var $mTokenOk = false;
 179         var $mTokenOkExceptSuffix = false;
 180         var $mTriedSave = false;
 181         var $incompleteForm = false;
 182         var $tooBig = false;
 183         var $kblength = false;
 184         var $missingComment = false;
 185         var $missingSummary = false;
 186         var $allowBlankSummary = false;
 187         var $autoSumm = '';
 188         var $hookError = '';
 189         #var $mPreviewTemplates;
 190
 191         /**
 192          * @var ParserOutput
 193          */
 194         var $mParserOutput;
 195
 196         /**
 197          * Has a summary been preset using GET parameter &summary= ?
 198          * @var Bool
 199          */
 200         var $hasPresetSummary = false;
 201
 202         var $mBaseRevision = false;
 203         var $mShowSummaryField = true;
 204
 205         # Form values
 206         var $save = false, $preview = false, $diff = false;
 207         var $minoredit = false, $watchthis = false, $recreate = false;
 208         var $textbox1 = '', $textbox2 = '', $summary = '', $nosummary = false;
 209         var $edittime = '', $section = '', $sectiontitle = '', $starttime = '';
 210         var $oldid = 0, $editintro = '', $scrolltop = null, $bot = true;
 211         var $content_model = null, $content_format = null;
 212
 213         # Placeholders for text injection by hooks (must be HTML)
 214         # extensions should take care to _append_ to the present value
 215         public $editFormPageTop = ''; // Before even the preview
 216         public $editFormTextTop = '';
 217         public $editFormTextBeforeContent = '';
 218         public $editFormTextAfterWarn = '';
 219         public $editFormTextAfterTools = '';
 220         public $editFormTextBottom = '';
 221         public $editFormTextAfterContent = '';
 222         public $previewTextAfterContent = '';
 223         public $mPreloadContent = null;
 224
 225         /* $didSave should be set to true whenever an article was succesfully altered. */
 226         public $didSave = false;
 227         public $undidRev = 0;
 228
 229         public $suppressIntro = false;
 230
 231         /**
 232          * @param $article Article
 233          */
 234         public function __construct( Article $article ) {
 235                 $this->mArticle = $article;
 236                 $this->mTitle = $article->getTitle();
 237
 238                 $this->content_model = $this->mTitle->getContentModelName();
 239
 240                 $handler = ContentHandler::getForModelName( $this->content_model );
 241                 $this->content_format = $handler->getDefaultFormat(); #NOTE: should be overridden by format of actual revision
 242         }
 243
 244         /**
 245          * @return Article
 246          */
 247         public function getArticle() {
 248                 return $this->mArticle;
 249         }
 250
 251         /**
 252          * @since 1.19
 253          * @return Title
 254          */
 255         public function getTitle() {
 256                 return $this->mTitle;
 257         }
 258
 259         /**
 260          * Set the context Title object
 261          *
 262          * @param $title Title object or null
 263          */
 264         public function setContextTitle( $title ) {
 265                 $this->mContextTitle = $title;
 266         }
 267
 268         /**
 269          * Get the context title object.
 270          * If not set, $wgTitle will be returned. This behavior might changed in
 271          * the future to return $this->mTitle instead.
 272          *
 273          * @return Title object
 274          */
 275         public function getContextTitle() {
 276                 if ( is_null( $this->mContextTitle ) ) {
 277                         global $wgTitle;
 278                         return $wgTitle;
 279                 } else {
 280                         return $this->mContextTitle;
 281                 }
 282         }
 283
 284         function submit() {
 285                 $this->edit();
 286         }
 287
 288         /**
 289          * This is the function that gets called for "action=edit". It
 290          * sets up various member variables, then passes execution to
 291          * another function, usually showEditForm()
 292          *
 293          * The edit form is self-submitting, so that when things like
 294          * preview and edit conflicts occur, we get the same form back
 295          * with the extra stuff added.  Only when the final submission
 296          * is made and all is well do we actually save and redirect to
 297          * the newly-edited page.
 298          */
 299         function edit() {
 300                 global $wgOut, $wgRequest, $wgUser;
 301                 // Allow extensions to modify/prevent this form or submission
 302                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 303                         return;
 304                 }
 305
 306                 wfProfileIn( __METHOD__ );
 307                 wfDebug( __METHOD__ . ": enter\n" );
 308
 309                 // If they used redlink=1 and the page exists, redirect to the main article
 310                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 311                         $wgOut->redirect( $this->mTitle->getFullURL() );
 312                         wfProfileOut( __METHOD__ );
 313                         return;
 314                 }
 315
 316                 $this->importFormData( $wgRequest );
 317                 $this->firsttime = false;
 318
 319                 if ( $this->live ) {
 320                         $this->livePreview();
 321                         wfProfileOut( __METHOD__ );
 322                         return;
 323                 }
 324
 325                 if ( wfReadOnly() && $this->save ) {
 326                         // Force preview
 327                         $this->save = false;
 328                         $this->preview = true;
 329                 }
 330
 331                 if ( $this->save ) {
 332                         $this->formtype = 'save';
 333                 } elseif ( $this->preview ) {
 334                         $this->formtype = 'preview';
 335                 } elseif ( $this->diff ) {
 336                         $this->formtype = 'diff';
 337                 } else { # First time through
 338                         $this->firsttime = true;
 339                         if ( $this->previewOnOpen() ) {
 340                                 $this->formtype = 'preview';
 341                         } else {
 342                                 $this->formtype = 'initial';
 343                         }
 344                 }
 345
 346                 $permErrors = $this->getEditPermissionErrors();
 347                 if ( $permErrors ) {
 348                         wfDebug( __METHOD__ . ": User can't edit\n" );
 349                         // Auto-block user's IP if the account was "hard" blocked
 350                         $wgUser->spreadAnyEditBlock();
 351
 352                         $this->displayPermissionsError( $permErrors );
 353
 354                         wfProfileOut( __METHOD__ );
 355                         return;
 356                 }
 357
 358                 wfProfileIn( __METHOD__ . "-business-end" );
 359
 360                 $this->isConflict = false;
 361                 // css / js subpages of user pages get a special treatment
 362                 $this->isCssJsSubpage       = $this->mTitle->isCssJsSubpage();
 363                 $this->isCssSubpage         = $this->mTitle->isCssSubpage();
 364                 $this->isJsSubpage          = $this->mTitle->isJsSubpage();
 365                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 366                 $this->isNew                = !$this->mTitle->exists() || $this->section == 'new';
 367
 368                 # Show applicable editing introductions
 369                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 370                         $this->showIntro();
 371                 }
 372
 373                 # Attempt submission here.  This will check for edit conflicts,
 374                 # and redundantly check for locked database, blocked IPs, etc.
 375                 # that edit() already checked just in case someone tries to sneak
 376                 # in the back door with a hand-edited submission URL.
 377
 378                 if ( 'save' == $this->formtype ) {
 379                         if ( !$this->attemptSave() ) {
 380                                 wfProfileOut( __METHOD__ . "-business-end" );
 381                                 wfProfileOut( __METHOD__ );
 382                                 return;
 383                         }
 384                 }
 385
 386                 # First time through: get contents, set time for conflict
 387                 # checking, etc.
 388                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 389                         if ( $this->initialiseForm() === false ) {
 390                                 $this->noSuchSectionPage();
 391                                 wfProfileOut( __METHOD__ . "-business-end" );
 392                                 wfProfileOut( __METHOD__ );
 393                                 return;
 394                         }
 395                         if ( !$this->mTitle->getArticleID() )
 396                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 397                         else
 398                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 399                 }
 400
 401                 $this->showEditForm();
 402                 wfProfileOut( __METHOD__ . "-business-end" );
 403                 wfProfileOut( __METHOD__ );
 404         }
 405
 406         /**
 407          * @return array
 408          */
 409         protected function getEditPermissionErrors() {
 410                 global $wgUser;
 411                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 412                 # Can this title be created?
 413                 if ( !$this->mTitle->exists() ) {
 414                         $permErrors = array_merge( $permErrors,
 415                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 416                 }
 417                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 418                 $remove = array();
 419                 foreach ( $permErrors as $error ) {
 420                         if ( ( $this->preview || $this->diff ) &&
 421                                 ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' ) )
 422                         {
 423                                 $remove[] = $error;
 424                         }
 425                 }
 426                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 427                 return $permErrors;
 428         }
 429
 430         /**
 431          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 432          * but with the following differences:
 433          * - If redlink=1, the user will be redirected to the page
 434          * - If there is content to display or the error occurs while either saving,
 435          *   previewing or showing the difference, it will be a
 436          *   "View source for ..." page displaying the source code after the error message.
 437          *
 438          * @since 1.19
 439          * @param $permErrors Array of permissions errors, as returned by
 440          *                    Title::getUserPermissionsErrors().
 441          */
 442         protected function displayPermissionsError( array $permErrors ) {
 443                 global $wgRequest, $wgOut;
 444
 445                 if ( $wgRequest->getBool( 'redlink' ) ) {
 446                         // The edit page was reached via a red link.
 447                         // Redirect to the article page and let them click the edit tab if
 448                         // they really want a permission error.
 449                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 450                         return;
 451                 }
 452
 453                 $content = $this->getContentObject();
 454
 455                 # Use the normal message if there's nothing to display
 456                 if ( $this->firsttime && $content->isEmpty() ) {
 457                         $action = $this->mTitle->exists() ? 'edit' :
 458                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 459                         throw new PermissionsError( $action, $permErrors );
 460                 }
 461
 462                 $wgOut->setPageTitle( wfMessage( 'viewsource-title', $this->getContextTitle()->getPrefixedText() ) );
 463                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 464                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 465                 $wgOut->addHTML( "<hr />\n" );
 466
 467                 # If the user made changes, preserve them when showing the markup
 468                 # (This happens when a user is blocked during edit, for instance)
 469                 if ( !$this->firsttime ) {
 470                         $text = $this->textbox1;
 471                         $wgOut->addWikiMsg( 'viewyourtext' );
 472                 } else {
 473                         $text = $content->serialize( $this->content_format );
 474                         $wgOut->addWikiMsg( 'viewsourcetext' );
 475                 }
 476
 477                 $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 478
 479                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 480                         Linker::formatTemplates( $this->getTemplates() ) ) );
 481
 482                 if ( $this->mTitle->exists() ) {
 483                         $wgOut->returnToMain( null, $this->mTitle );
 484                 }
 485         }
 486
 487         /**
 488          * Show a read-only error
 489          * Parameters are the same as OutputPage:readOnlyPage()
 490          * Redirect to the article page if redlink=1
 491          * @deprecated in 1.19; use displayPermissionsError() instead
 492          */
 493         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 494                 wfDeprecated( __METHOD__, '1.19' );
 495
 496                 global $wgRequest, $wgOut;
 497                 if ( $wgRequest->getBool( 'redlink' ) ) {
 498                         // The edit page was reached via a red link.
 499                         // Redirect to the article page and let them click the edit tab if
 500                         // they really want a permission error.
 501                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 502                 } else {
 503                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 504                 }
 505         }
 506
 507         /**
 508          * Should we show a preview when the edit form is first shown?
 509          *
 510          * @return bool
 511          */
 512         protected function previewOnOpen() {
 513                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 514                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 515                         // Explicit override from request
 516                         return true;
 517                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 518                         // Explicit override from request
 519                         return false;
 520                 } elseif ( $this->section == 'new' ) {
 521                         // Nothing *to* preview for new sections
 522                         return false;
 523                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 524                         // Standard preference behaviour
 525                         return true;
 526                 } elseif ( !$this->mTitle->exists() &&
 527                   isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] ) &&
 528                   $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 529                 {
 530                         // Categories are special
 531                         return true;
 532                 } else {
 533                         return false;
 534                 }
 535         }
 536
 537         /**
 538          * Checks whether the user entered a skin name in uppercase,
 539          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 540          *
 541          * @return bool
 542          */
 543         protected function isWrongCaseCssJsPage() {
 544                 if ( $this->mTitle->isCssJsSubpage() ) {
 545                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 546                         $skins = array_merge(
 547                                 array_keys( Skin::getSkinNames() ),
 548                                 array( 'common' )
 549                         );
 550                         return !in_array( $name, $skins )
 551                                 && in_array( strtolower( $name ), $skins );
 552                 } else {
 553                         return false;
 554                 }
 555         }
 556
 557         /**
 558          * Does this EditPage class support section editing?
 559          * This is used by EditPage subclasses to indicate their ui cannot handle section edits
 560          *
 561          * @return bool
 562          */
 563         protected function isSectionEditSupported() {
 564                 return true;
 565         }
 566
 567         /**
 568          * This function collects the form data and uses it to populate various member variables.
 569          * @param $request WebRequest
 570          */
 571         function importFormData( &$request ) {
 572                 global $wgLang, $wgUser;
 573
 574                 wfProfileIn( __METHOD__ );
 575
 576                 # Section edit can come from either the form or a link
 577                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 578
 579                 if ( $request->wasPosted() ) {
 580                         # These fields need to be checked for encoding.
 581                         # Also remove trailing whitespace, but don't remove _initial_
 582                         # whitespace from the text boxes. This may be significant formatting.
 583                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 584                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 585                                 // Skip this if wpTextbox2 has input, it indicates that we came
 586                                 // from a conflict page with raw page text, not a custom form
 587                                 // modified by subclasses
 588                                 wfProfileIn( get_class( $this ) . "::importContentFormData" );
 589                                 $textbox1 = $this->importContentFormData( $request );
 590                                 if ( isset( $textbox1 ) )
 591                                         $this->textbox1 = $textbox1;
 592                                 wfProfileOut( get_class( $this ) . "::importContentFormData" );
 593                         }
 594
 595                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 596                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary' ), 250 );
 597
 598                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 599                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 600                         # section titles.
 601                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 602
 603                         # Treat sectiontitle the same way as summary.
 604                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 605                         # currently doing double duty as both edit summary and section title. Right now this
 606                         # is just to allow API edits to work around this limitation, but this should be
 607                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 608                         $this->sectiontitle = $wgLang->truncate( $request->getText( 'wpSectionTitle' ), 250 );
 609                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 610
 611                         $this->edittime = $request->getVal( 'wpEdittime' );
 612                         $this->starttime = $request->getVal( 'wpStarttime' );
 613
 614                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 615
 616                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 617                                 // wpTextbox1 field is missing, possibly due to being "too big"
 618                                 // according to some filter rules such as Suhosin's setting for
 619                                 // suhosin.request.max_value_length (d'oh)
 620                                 $this->incompleteForm = true;
 621                         } else {
 622                                 // edittime should be one of our last fields; if it's missing,
 623                                 // the submission probably broke somewhere in the middle.
 624                                 $this->incompleteForm = is_null( $this->edittime );
 625                         }
 626                         if ( $this->incompleteForm ) {
 627                                 # If the form is incomplete, force to preview.
 628                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 629                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 630                                 $this->preview = true;
 631                         } else {
 632                                 /* Fallback for live preview */
 633                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 634                                 $this->diff = $request->getCheck( 'wpDiff' );
 635
 636                                 // Remember whether a save was requested, so we can indicate
 637                                 // if we forced preview due to session failure.
 638                                 $this->mTriedSave = !$this->preview;
 639
 640                                 if ( $this->tokenOk( $request ) ) {
 641                                         # Some browsers will not report any submit button
 642                                         # if the user hits enter in the comment box.
 643                                         # The unmarked state will be assumed to be a save,
 644                                         # if the form seems otherwise complete.
 645                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 646                                 } elseif ( $this->diff ) {
 647                                         # Failed token check, but only requested "Show Changes".
 648                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 649                                 } else {
 650                                         # Page might be a hack attempt posted from
 651                                         # an external site. Preview instead of saving.
 652                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 653                                         $this->preview = true;
 654                                 }
 655                         }
 656                         $this->save = !$this->preview && !$this->diff;
 657                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 658                                 $this->edittime = null;
 659                         }
 660
 661                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 662                                 $this->starttime = null;
 663                         }
 664
 665                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 666
 667                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 668                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 669
 670                         # Don't force edit summaries when a user is editing their own user or talk page
 671                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 672                                 $this->mTitle->getText() == $wgUser->getName() )
 673                         {
 674                                 $this->allowBlankSummary = true;
 675                         } else {
 676                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary' );
 677                         }
 678
 679                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 680                 } else {
 681                         # Not a posted form? Start with nothing.
 682                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 683                         $this->textbox1     = ''; #FIXME: track content object
 684                         $this->summary      = '';
 685                         $this->sectiontitle = '';
 686                         $this->edittime     = '';
 687                         $this->starttime    = wfTimestampNow();
 688                         $this->edit         = false;
 689                         $this->preview      = false;
 690                         $this->save         = false;
 691                         $this->diff         = false;
 692                         $this->minoredit    = false;
 693                         $this->watchthis    = $request->getBool( 'watchthis', false ); // Watch may be overriden by request parameters
 694                         $this->recreate     = false;
 695
 696                         // When creating a new section, we can preload a section title by passing it as the
 697                         // preloadtitle parameter in the URL (Bug 13100)
 698                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 699                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 700                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 701                                 $this->summary = $request->getVal( 'preloadtitle' );
 702                         }
 703                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 704                                 $this->summary = $request->getText( 'summary' );
 705                                 if ( $this->summary !== '' ) {
 706                                         $this->hasPresetSummary = true;
 707                                 }
 708                         }
 709
 710                         if ( $request->getVal( 'minor' ) ) {
 711                                 $this->minoredit = true;
 712                         }
 713                 }
 714
 715                 $this->oldid = $request->getInt( 'oldid' );
 716
 717                 $this->bot = $request->getBool( 'bot', true );
 718                 $this->nosummary = $request->getBool( 'nosummary' );
 719
 720                 $content_handler = ContentHandler::getForTitle( $this->mTitle );
 721                 $this->content_model = $request->getText( 'model', $content_handler->getModelName() ); #may be overridden by revision
 722                 $this->content_format = $request->getText( 'format', $content_handler->getDefaultFormat() ); #may be overridden by revision
 723
 724                 #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
 725                 #TODO: check if the desired content model supports the given content format!
 726
 727                 $this->live = $request->getCheck( 'live' );
 728                 $this->editintro = $request->getText( 'editintro',
 729                         // Custom edit intro for new sections
 730                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 731
 732                 // Allow extensions to modify form data
 733                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 734
 735                 wfProfileOut( __METHOD__ );
 736         }
 737
 738         /**
 739          * Subpage overridable method for extracting the page content data from the
 740          * posted form to be placed in $this->textbox1, if using customized input
 741          * this method should be overrided and return the page text that will be used
 742          * for saving, preview parsing and so on...
 743          *
 744          * @param $request WebRequest
 745          */
 746         protected function importContentFormData( &$request ) {
 747                 return; // Don't do anything, EditPage already extracted wpTextbox1
 748         }
 749
 750         /**
 751          * Initialise form fields in the object
 752          * Called on the first invocation, e.g. when a user clicks an edit link
 753          * @return bool -- if the requested section is valid
 754          */
 755         function initialiseForm() {
 756                 global $wgUser;
 757                 $this->edittime = $this->mArticle->getTimestamp();
 758
 759                 $content = $this->getContentObject( false ); #TODO: track content object?!
 760                 $this->textbox1 = $content->serialize( $this->content_format );
 761
 762                 // activate checkboxes if user wants them to be always active
 763                 # Sort out the "watch" checkbox
 764                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 765                         # Watch all edits
 766                         $this->watchthis = true;
 767                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 768                         # Watch creations
 769                         $this->watchthis = true;
 770                 } elseif ( $this->mTitle->userIsWatching() ) {
 771                         # Already watched
 772                         $this->watchthis = true;
 773                 }
 774                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 775                         $this->minoredit = true;
 776                 }
 777                 if ( $this->textbox1 === false ) {
 778                         return false;
 779                 }
 780                 wfProxyCheck();
 781                 return true;
 782         }
 783
 784         /**
 785          * Fetch initial editing page content.
 786          *
 787          * @param $def_text string
 788          * @return mixed string on success, $def_text for invalid sections
 789          * @private
 790          * @deprecated since 1.20
 791          */
 792         function getContent( $def_text = false ) { #FIXME: deprecated, replace usage!
 793                 if ( $def_text !== null && $def_text !== false && $def_text !== '' ) {
 794                         $def_content = ContentHandler::makeContent( $def_text, $this->getTitle() );
 795                 } else {
 796                         $def_content = false;
 797                 }
 798
 799                 $content = $this->getContentObject( $def_content );
 800
 801                 return $content->serialize( $this->content_format ); #XXX: really use serialized form? use ContentHandler::getContentText() instead?
 802         }
 803
 804         private function getContentObject( $def_content = null ) { #FIXME: use this!
 805                 global $wgOut, $wgRequest;
 806
 807                 wfProfileIn( __METHOD__ );
 808
 809                 $content = false;
 810
 811                 // For message page not locally set, use the i18n message.
 812                 // For other non-existent articles, use preload text if any.
 813                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
 814                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
 815                                 # If this is a system message, get the default text.
 816                                 $msg = $this->mTitle->getDefaultMessageText();
 817
 818                                 $content = ContentHandler::makeContent( $msg, $this->mTitle );
 819                         }
 820                         if ( $content === false ) {
 821                                 # If requested, preload some text.
 822                                 $preload = $wgRequest->getVal( 'preload',
 823                                         // Custom preload text for new sections
 824                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 825
 826                                 $content = $this->getPreloadedContent( $preload );
 827                         }
 828                 // For existing pages, get text based on "undo" or section parameters.
 829                 } else {
 830                         if ( $this->section != '' ) {
 831                                 // Get section edit text (returns $def_text for invalid sections)
 832                                 $orig = $this->getOriginalContent();
 833                                 $content = $orig ? $orig->getSection( $this->section ) : null;
 834
 835                                 if ( !$content ) $content = $def_content;
 836                         } else {
 837                                 $undoafter = $wgRequest->getInt( 'undoafter' );
 838                                 $undo = $wgRequest->getInt( 'undo' );
 839
 840                                 if ( $undo > 0 && $undoafter > 0 ) {
 841                                         if ( $undo < $undoafter ) {
 842                                                 # If they got undoafter and undo round the wrong way, switch them
 843                                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 844                                         }
 845
 846                                         $undorev = Revision::newFromId( $undo );
 847                                         $oldrev = Revision::newFromId( $undoafter );
 848
 849                                         # Sanity check, make sure it's the right page,
 850                                         # the revisions exist and they were not deleted.
 851                                         # Otherwise, $content will be left as-is.
 852                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 853                                                 $undorev->getPage() == $oldrev->getPage() &&
 854                                                 $undorev->getPage() == $this->mTitle->getArticleID() &&
 855                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 856                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 857
 858                         $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
 859
 860                                                 if ( $content === false ) {
 861                                                         # Warn the user that something went wrong
 862                                                         $undoMsg = 'failure';
 863                                                 } else {
 864                                                         # Inform the user of our success and set an automatic edit summary
 865                                                         $undoMsg = 'success';
 866
 867                                                         # If we just undid one rev, use an autosummary
 868                                                         $firstrev = $oldrev->getNext();
 869                                                         if ( $firstrev->getId() == $undo ) {
 870                                                                 $undoSummary = wfMsgForContent( 'undo-summary', $undo, $undorev->getUserText() );
 871                                                                 if ( $this->summary === '' ) {
 872                                                                         $this->summary = $undoSummary;
 873                                                                 } else {
 874                                                                         $this->summary = $undoSummary . wfMsgForContent( 'colon-separator' ) . $this->summary;
 875                                                                 }
 876                                                                 $this->undidRev = $undo;
 877                                                         }
 878                                                         $this->formtype = 'diff';
 879                                                 }
 880                                         } else {
 881                                                 // Failed basic sanity checks.
 882                                                 // Older revisions may have been removed since the link
 883                                                 // was created, or we may simply have got bogus input.
 884                                                 $undoMsg = 'norev';
 885                                         }
 886
 887                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
 888                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
 889                                                 wfMsgNoTrans( 'undo-' . $undoMsg ) . '</div>', true, /* interface */true );
 890                                 }
 891
 892                                 if ( $content === false ) {
 893                                         $content = $this->getOriginalContent();
 894                                 }
 895                         }
 896                 }
 897
 898                 wfProfileOut( __METHOD__ );
 899                 return $content;
 900         }
 901
 902         /**
 903          * Get the content of the wanted revision, without section extraction.
 904          *
 905          * The result of this function can be used to compare user's input with
 906          * section replaced in its context (using WikiPage::replaceSection())
 907          * to the original text of the edit.
 908          *
 909          * This difers from Article::getContent() that when a missing revision is
 910          * encountered the result will be an empty string and not the
 911          * 'missing-article' message.
 912          *
 913          * @since 1.19
 914          * @return string
 915          */
 916         private function getOriginalContent() {
 917                 if ( $this->section == 'new' ) {
 918                         return $this->getCurrentContent();
 919                 }
 920                 $revision = $this->mArticle->getRevisionFetched();
 921                 if ( $revision === null ) {
 922                         if ( !$this->content_model ) $this->content_model = $this->getTitle()->getContentModelName();
 923                         $handler = ContentHandler::getForModelName( $this->content_model );
 924
 925                         return $handler->makeEmptyContent();
 926                 }
 927         $content = $revision->getContent();
 928                 return $content;
 929         }
 930
 931     /**
 932      * Get the current content of the page. This is basically similar to
 933      * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
 934      * content object is returned instead of null.
 935      *
 936      * @since 1.20
 937      * @return string
 938      */
 939     private function getCurrentContent() {
 940         $rev = $this->mArticle->getRevision();
 941         $content = $rev ? $rev->getContent( Revision::RAW ) : null;
 942
 943         if ( $content  === false || $content === null ) {
 944             if ( !$this->content_model ) $this->content_model = $this->getTitle()->getContentModelName();
 945             $handler = ContentHandler::getForModelName( $this->content_model );
 946
 947             return $handler->makeEmptyContent();
 948         } else {
 949             #FIXME: nasty side-effect!
 950             $this->content_model = $rev->getContentModelName();
 951             $this->content_format = $rev->getContentFormat();
 952
 953             return $content;
 954         }
 955     }
 956
 957
 958     /**
 959      * Use this method before edit() to preload some text into the edit box
 960      *
 961      * @param $text string
 962      * @deprecated since 1.20
 963      */
 964     public function setPreloadedText( $text ) { #FIXME: deprecated, use setPreloadedContent()
 965         wfDeprecated( __METHOD__, "1.20" );
 966
 967         $content = ContentHandler::makeContent( $text, $this->getTitle() );
 968
 969         $this->setPreloadedContent( $content );
 970     }
 971
 972     /**
 973      * Use this method before edit() to preload some content into the edit box
 974      *
 975      * @param $content Content
 976      */
 977     public function setPreloadedContent( Content $content ) { #FIXME: use this!
 978         $this->mPreloadedContent = $content;
 979     }
 980
 981     /**
 982      * Get the contents to be preloaded into the box, either set by
 983      * an earlier setPreloadText() or by loading the given page.
 984      *
 985      * @param $preload String: representing the title to preload from.
 986      * @return String
 987      * @deprecated since 1.20
 988      */
 989     protected function getPreloadedText( $preload ) { #FIXME: B/C only, replace usage!
 990         wfDeprecated( __METHOD__, "1.20" );
 991
 992         $content = $this->getPreloadedContent( $preload );
 993         $text = $content->serialize( $this->content_format ); #XXX: really use serialized form? use ContentHandler::getContentText() instead?!
 994
 995         return $text;
 996     }
 997
 998     protected function getPreloadedContent( $preload ) { #FIXME: use this!
 999         global $wgUser;
1000
1001         if ( !empty( $this->mPreloadContent ) ) {
1002             return $this->mPreloadContent;
1003         }
1004
1005         $handler = ContentHandler::getForTitle( $this->getTitle() );
1006
1007         if ( $preload === '' ) {
1008             return $handler->makeEmptyContent();
1009         }
1010
1011         $title = Title::newFromText( $preload );
1012         # Check for existence to avoid getting MediaWiki:Noarticletext
1013         if ( $title === null || !$title->exists() || !$title->userCan( 'read' ) ) {
1014             return $handler->makeEmptyContent();
1015         }
1016
1017         $page = WikiPage::factory( $title );
1018         if ( $page->isRedirect() ) {
1019             $title = $page->getRedirectTarget();
1020             # Same as before
1021             if ( $title === null || !$title->exists() || !$title->userCan( 'read' ) ) {
1022                 return $handler->makeEmptyContent();
1023             }
1024             $page = WikiPage::factory( $title );
1025         }
1026
1027         $parserOptions = ParserOptions::newFromUser( $wgUser );
1028         $content = $page->getContent( Revision::RAW );
1029
1030         return $content->preloadTransform( $title, $parserOptions );
1031     }
1032
1033         /**
1034          * Make sure the form isn't faking a user's credentials.
1035          *
1036          * @param $request WebRequest
1037          * @return bool
1038          * @private
1039          */
1040         function tokenOk( &$request ) {
1041                 global $wgUser;
1042                 $token = $request->getVal( 'wpEditToken' );
1043                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1044                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1045                 return $this->mTokenOk;
1046         }
1047
1048         /**
1049          * Attempt submission
1050          * @return bool false if output is done, true if the rest of the form should be displayed
1051          */
1052         function attemptSave() {
1053                 global $wgUser, $wgOut;
1054
1055                 $resultDetails = false;
1056                 # Allow bots to exempt some edits from bot flagging
1057                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1058                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1059                 // FIXME: once the interface for internalAttemptSave() is made nicer, this should use the message in $status
1060
1061                 if ( $status->value == self::AS_SUCCESS_UPDATE || $status->value == self::AS_SUCCESS_NEW_ARTICLE ) {
1062                         $this->didSave = true;
1063                 }
1064
1065                 switch ( $status->value ) {
1066                         case self::AS_HOOK_ERROR_EXPECTED:
1067                         case self::AS_CONTENT_TOO_BIG:
1068                         case self::AS_ARTICLE_WAS_DELETED:
1069                         case self::AS_CONFLICT_DETECTED:
1070                         case self::AS_SUMMARY_NEEDED:
1071                         case self::AS_TEXTBOX_EMPTY:
1072                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1073                         case self::AS_END:
1074                                 return true;
1075
1076                         case self::AS_HOOK_ERROR:
1077                         case self::AS_FILTERING:
1078                                 return false;
1079
1080                         case self::AS_PARSE_ERROR:
1081                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>');
1082                                 #FIXME: cause editform to be shown again, not just an error!
1083                                 return false;
1084
1085                         case self::AS_SUCCESS_NEW_ARTICLE:
1086                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1087                                 $anchor = isset ( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1088                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1089                                 return false;
1090
1091                         case self::AS_SUCCESS_UPDATE:
1092                                 $extraQuery = '';
1093                                 $sectionanchor = $resultDetails['sectionanchor'];
1094
1095                                 // Give extensions a chance to modify URL query on update
1096                                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this->mArticle, &$sectionanchor, &$extraQuery ) );
1097
1098                                 if ( $resultDetails['redirect'] ) {
1099                                         if ( $extraQuery == '' ) {
1100                                                 $extraQuery = 'redirect=no';
1101                                         } else {
1102                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1103                                         }
1104                                 }
1105                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1106                                 return false;
1107
1108                         case self::AS_BLANK_ARTICLE:
1109                                 $wgOut->redirect( $this->getContextTitle()->getFullURL() );
1110                                 return false;
1111
1112                         case self::AS_SPAM_ERROR:
1113                                 $this->spamPageWithContent( $resultDetails['spam'] );
1114                                 return false;
1115
1116                         case self::AS_BLOCKED_PAGE_FOR_USER:
1117                                 throw new UserBlockedError( $wgUser->getBlock() );
1118
1119                         case self::AS_IMAGE_REDIRECT_ANON:
1120                         case self::AS_IMAGE_REDIRECT_LOGGED:
1121                                 throw new PermissionsError( 'upload' );
1122
1123                         case self::AS_READ_ONLY_PAGE_ANON:
1124                         case self::AS_READ_ONLY_PAGE_LOGGED:
1125                                 throw new PermissionsError( 'edit' );
1126
1127                         case self::AS_READ_ONLY_PAGE:
1128                                 throw new ReadOnlyError;
1129
1130                         case self::AS_RATE_LIMITED:
1131                                 throw new ThrottledError();
1132
1133                         case self::AS_NO_CREATE_PERMISSION:
1134                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1135                                 throw new PermissionsError( $permission );
1136
1137                 }
1138                 return false;
1139         }
1140
1141         /**
1142          * Attempt submission (no UI)
1143          *
1144          * @param $result
1145          * @param $bot bool
1146          *
1147          * @return Status object, possibly with a message, but always with one of the AS_* constants in $status->value,
1148          *
1149          * FIXME: This interface is TERRIBLE, but hard to get rid of due to various error display idiosyncrasies. There are
1150          * also lots of cases where error metadata is set in the object and retrieved later instead of being returned, e.g.
1151          * AS_CONTENT_TOO_BIG and AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some time.
1152          */
1153         function internalAttemptSave( &$result, $bot = false ) {
1154                 global $wgFilterCallback, $wgUser, $wgRequest, $wgParser;
1155                 global $wgMaxArticleSize;
1156
1157                 $status = Status::newGood();
1158
1159                 wfProfileIn( __METHOD__  );
1160                 wfProfileIn( __METHOD__ . '-checks' );
1161
1162                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
1163                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1164                         $status->fatal( 'hookaborted' );
1165                         $status->value = self::AS_HOOK_ERROR;
1166                         wfProfileOut( __METHOD__ . '-checks' );
1167                         wfProfileOut( __METHOD__  );
1168                         return $status;
1169                 }
1170
1171                 # Check image redirect
1172                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1173                         Title::newFromRedirect( $this->textbox1 ) instanceof Title && #FIXME: use content handler to check for redirect
1174                         !$wgUser->isAllowed( 'upload' ) ) {
1175                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1176                                 $status->setResult( false, $code );
1177
1178                                 wfProfileOut( __METHOD__ . '-checks' );
1179                                 wfProfileOut( __METHOD__  );
1180
1181                                 return $status;
1182                 }
1183
1184                 # Check for spam
1185                 $match = self::matchSummarySpamRegex( $this->summary );
1186                 if ( $match === false ) {
1187                         $match = self::matchSpamRegex( $this->textbox1 );
1188                 }
1189                 if ( $match !== false ) {
1190                         $result['spam'] = $match;
1191                         $ip = $wgRequest->getIP();
1192                         $pdbk = $this->mTitle->getPrefixedDBkey();
1193                         $match = str_replace( "\n", '', $match );
1194                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1195                         $status->fatal( 'spamprotectionmatch', $match );
1196                         $status->value = self::AS_SPAM_ERROR;
1197                         wfProfileOut( __METHOD__ . '-checks' );
1198                         wfProfileOut( __METHOD__ );
1199                         return $status;
1200                 }
1201                 if ( $wgFilterCallback && is_callable( $wgFilterCallback ) && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
1202                         # Error messages or other handling should be performed by the filter function
1203                         $status->setResult( false, self::AS_FILTERING );
1204                         wfProfileOut( __METHOD__ . '-checks' );
1205                         wfProfileOut( __METHOD__ );
1206                         return $status;
1207                 }
1208                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
1209                         # Error messages etc. could be handled within the hook...
1210                         $status->fatal( 'hookaborted' );
1211                         $status->value = self::AS_HOOK_ERROR;
1212                         wfProfileOut( __METHOD__ . '-checks' );
1213                         wfProfileOut( __METHOD__ );
1214                         return $status;
1215                 } elseif ( $this->hookError != '' ) {
1216                         # ...or the hook could be expecting us to produce an error
1217                         $status->fatal( 'hookaborted' );
1218                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1219                         wfProfileOut( __METHOD__ . '-checks' );
1220                         wfProfileOut( __METHOD__ );
1221                         return $status;
1222                 }
1223
1224                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1225                         // Auto-block user's IP if the account was "hard" blocked
1226                         $wgUser->spreadAnyEditBlock();
1227                         # Check block state against master, thus 'false'.
1228                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1229                         wfProfileOut( __METHOD__ . '-checks' );
1230                         wfProfileOut( __METHOD__ );
1231                         return $status;
1232                 }
1233
1234                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1235                 if ( $this->kblength > $wgMaxArticleSize ) {
1236                         // Error will be displayed by showEditForm()
1237                         $this->tooBig = true;
1238                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1239                         wfProfileOut( __METHOD__ . '-checks' );
1240                         wfProfileOut( __METHOD__ );
1241                         return $status;
1242                 }
1243
1244                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1245                         if ( $wgUser->isAnon() ) {
1246                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1247                                 wfProfileOut( __METHOD__ . '-checks' );
1248                                 wfProfileOut( __METHOD__ );
1249                                 return $status;
1250                         } else {
1251                                 $status->fatal( 'readonlytext' );
1252                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1253                                 wfProfileOut( __METHOD__ . '-checks' );
1254                                 wfProfileOut( __METHOD__ );
1255                                 return $status;
1256                         }
1257                 }
1258
1259                 if ( wfReadOnly() ) {
1260                         $status->fatal( 'readonlytext' );
1261                         $status->value = self::AS_READ_ONLY_PAGE;
1262                         wfProfileOut( __METHOD__ . '-checks' );
1263                         wfProfileOut( __METHOD__ );
1264                         return $status;
1265                 }
1266                 if ( $wgUser->pingLimiter() ) {
1267                         $status->fatal( 'actionthrottledtext' );
1268                         $status->value = self::AS_RATE_LIMITED;
1269                         wfProfileOut( __METHOD__ . '-checks' );
1270                         wfProfileOut( __METHOD__ );
1271                         return $status;
1272                 }
1273
1274                 # If the article has been deleted while editing, don't save it without
1275                 # confirmation
1276                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1277                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1278                         wfProfileOut( __METHOD__ . '-checks' );
1279                         wfProfileOut( __METHOD__ );
1280                         return $status;
1281                 }
1282
1283                 wfProfileOut( __METHOD__ . '-checks' );
1284
1285                 # If article is new, insert it.
1286                 $aid = $this->mTitle->getArticleID( Title::GAID_FOR_UPDATE );
1287                 $new = ( $aid == 0 );
1288
1289                 try {
1290             if ( $new ) {
1291                 // Late check for create permission, just in case *PARANOIA*
1292                 if ( !$this->mTitle->userCan( 'create' ) ) {
1293                     $status->fatal( 'nocreatetext' );
1294                     $status->value = self::AS_NO_CREATE_PERMISSION;
1295                     wfDebug( __METHOD__ . ": no create permission\n" );
1296                     wfProfileOut( __METHOD__ );
1297                     return $status;
1298                 }
1299
1300                 # Don't save a new article if it's blank.
1301                 if ( $this->textbox1 == '' ) {
1302                     $status->setResult( false, self::AS_BLANK_ARTICLE );
1303                     wfProfileOut( __METHOD__ );
1304                     return $status;
1305                 }
1306
1307                 // Run post-section-merge edit filter
1308                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
1309                     # Error messages etc. could be handled within the hook...
1310                     $status->fatal( 'hookaborted' );
1311                     $status->value = self::AS_HOOK_ERROR;
1312                     wfProfileOut( __METHOD__ );
1313                     return $status;
1314                 } elseif ( $this->hookError != '' ) {
1315                     # ...or the hook could be expecting us to produce an error
1316                     $status->fatal( 'hookaborted' );
1317                     $status->value = self::AS_HOOK_ERROR_EXPECTED;
1318                     wfProfileOut( __METHOD__ );
1319                     return $status;
1320                 }
1321
1322                 $content = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format );
1323
1324                 $result['sectionanchor'] = '';
1325                 if ( $this->section == 'new' ) {
1326                     if ( $this->sectiontitle !== '' ) {
1327                         // Insert the section title above the content.
1328                         $content = $content->addSectionHeader( $this->sectiontitle );
1329
1330                         // Jump to the new section
1331                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1332
1333                         // If no edit summary was specified, create one automatically from the section
1334                         // title and have it link to the new section. Otherwise, respect the summary as
1335                         // passed.
1336                         if ( $this->summary === '' ) {
1337                             $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1338                             $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSectionTitle );
1339                         }
1340                     } elseif ( $this->summary !== '' ) {
1341                         // Insert the section title above the content.
1342                         $content = $content->addSectionHeader( $this->sectiontitle );
1343
1344                         // Jump to the new section
1345                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1346
1347                         // Create a link to the new section from the edit summary.
1348                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1349                         $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1350                     }
1351                 }
1352
1353                 $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1354
1355             } else { # not $new
1356
1357                 # Article exists. Check for edit conflict.
1358
1359                 $this->mArticle->clear(); # Force reload of dates, etc.
1360                 $timestamp = $this->mArticle->getTimestamp();
1361
1362                 wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1363
1364                 if ( $timestamp != $this->edittime ) {
1365                     $this->isConflict = true;
1366                     if ( $this->section == 'new' ) {
1367                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1368                             $this->mArticle->getComment() == $this->summary ) {
1369                             // Probably a duplicate submission of a new comment.
1370                             // This can happen when squid resends a request after
1371                             // a timeout but the first one actually went through.
1372                             wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
1373                         } else {
1374                             // New comment; suppress conflict.
1375                             $this->isConflict = false;
1376                             wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1377                         }
1378                     } elseif ( $this->section == '' && $this->userWasLastToEdit( $wgUser->getId(), $this->edittime ) ) {
1379                         # Suppress edit conflict with self, except for section edits where merging is required.
1380                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1381                         $this->isConflict = false;
1382                     }
1383                 }
1384
1385                 // If sectiontitle is set, use it, otherwise use the summary as the section title (for
1386                 // backwards compatibility with old forms/bots).
1387                 if ( $this->sectiontitle !== '' ) {
1388                     $sectionTitle = $this->sectiontitle;
1389                 } else {
1390                     $sectionTitle = $this->summary;
1391                 }
1392
1393                 $textbox_content = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format );
1394                 $content = null;
1395
1396                 if ( $this->isConflict ) {
1397                     wfDebug( __METHOD__ . ": conflict! getting section '$this->section' for time '$this->edittime' (article time '{$timestamp}')\n" );
1398                     $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle, $this->edittime );
1399                 } else {
1400                     wfDebug( __METHOD__ . ": getting section '$this->section'\n" );
1401                     $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle );
1402                 }
1403
1404                 if ( is_null( $content ) ) {
1405                     wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1406                     $this->isConflict = true;
1407                     $content = $textbox_content; // do not try to merge here!
1408                 } elseif ( $this->isConflict ) {
1409                     # Attempt merge
1410                     if ( $this->mergeChangesIntoContent( $textbox_content ) ) {
1411                         // Successful merge! Maybe we should tell the user the good news?
1412                         $this->isConflict = false;
1413                         $content = $textbox_content;
1414                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1415                     } else {
1416                         $this->section = '';
1417                         #$this->textbox1 = $text; #redundant, nothing to do here?
1418                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1419                     }
1420                 }
1421
1422                 if ( $this->isConflict ) {
1423                     $status->setResult( false, self::AS_CONFLICT_DETECTED );
1424                     wfProfileOut( __METHOD__ );
1425                     return $status;
1426                 }
1427
1428                 // Run post-section-merge edit filter
1429                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $content->serialize( $this->content_format ), &$this->hookError, $this->summary ) )
1430                         || !wfRunHooks( 'EditFilterMergedContent', array( $this, $content, &$this->hookError, $this->summary ) ) ) { #FIXME: document new hook
1431                     # Error messages etc. could be handled within the hook...
1432                     $status->fatal( 'hookaborted' );
1433                     $status->value = self::AS_HOOK_ERROR;
1434                     wfProfileOut( __METHOD__ );
1435                     return $status;
1436                 } elseif ( $this->hookError != '' ) {
1437                     # ...or the hook could be expecting us to produce an error
1438                     $status->fatal( 'hookaborted' );
1439                     $status->value = self::AS_HOOK_ERROR_EXPECTED;
1440                     wfProfileOut( __METHOD__ );
1441                     return $status;
1442                 }
1443
1444                 $content = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format );
1445
1446                 # Handle the user preference to force summaries here, but not for null edits
1447                 if ( $this->section != 'new' && !$this->allowBlankSummary
1448                     && !$content->equals( $this->getOriginalContent() )
1449                     && !$content->isRedirect() ) # check if it's not a redirect
1450                 {
1451                     if ( md5( $this->summary ) == $this->autoSumm ) {
1452                         $this->missingSummary = true;
1453                         $status->fatal( 'missingsummary' );
1454                         $status->value = self::AS_SUMMARY_NEEDED;
1455                         wfProfileOut( __METHOD__ );
1456                         return $status;
1457                     }
1458                 }
1459
1460                 # And a similar thing for new sections
1461                 if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1462                     if ( trim( $this->summary ) == '' ) {
1463                         $this->missingSummary = true;
1464                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1465                         $status->value = self::AS_SUMMARY_NEEDED;
1466                         wfProfileOut( __METHOD__ );
1467                         return $status;
1468                     }
1469                 }
1470
1471                 # All's well
1472                 wfProfileIn( __METHOD__ . '-sectionanchor' );
1473                 $sectionanchor = '';
1474                 if ( $this->section == 'new' ) {
1475                     if ( $this->textbox1 == '' ) {
1476                         $this->missingComment = true;
1477                         $status->fatal( 'missingcommenttext' );
1478                         $status->value = self::AS_TEXTBOX_EMPTY;
1479                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1480                         wfProfileOut( __METHOD__ );
1481                         return $status;
1482                     }
1483                     if ( $this->sectiontitle !== '' ) {
1484                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1485                         // If no edit summary was specified, create one automatically from the section
1486                         // title and have it link to the new section. Otherwise, respect the summary as
1487                         // passed.
1488                         if ( $this->summary === '' ) {
1489                             $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1490                             $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSectionTitle );
1491                         }
1492                     } elseif ( $this->summary !== '' ) {
1493                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1494                         # This is a new section, so create a link to the new section
1495                         # in the revision summary.
1496                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1497                         $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1498                     }
1499                 } elseif ( $this->section != '' ) {
1500                     # Try to get a section anchor from the section source, redirect to edited section if header found
1501                     # XXX: might be better to integrate this into Article::replaceSection
1502                     # for duplicate heading checking and maybe parsing
1503                     $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1504                     # we can't deal with anchors, includes, html etc in the header for now,
1505                     # headline would need to be parsed to improve this
1506                     if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1507                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1508                     }
1509                 }
1510                 $result['sectionanchor'] = $sectionanchor;
1511                 wfProfileOut( __METHOD__ . '-sectionanchor' );
1512
1513                 // Save errors may fall down to the edit form, but we've now
1514                 // merged the section into full text. Clear the section field
1515                 // so that later submission of conflict forms won't try to
1516                 // replace that into a duplicated mess.
1517                     $this->textbox1 = $content->serialize( $this->content_format );
1518                 $this->section = '';
1519
1520                 $status->value = self::AS_SUCCESS_UPDATE;
1521             }
1522
1523             // Check for length errors again now that the section is merged in
1524                 $this->kblength = (int)( strlen( $content->serialize( $this->content_format ) ) / 1024 );
1525             if ( $this->kblength > $wgMaxArticleSize ) {
1526                 $this->tooBig = true;
1527                 $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1528                 wfProfileOut( __METHOD__ );
1529                 return $status;
1530             }
1531
1532             $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1533                 ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1534                 ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1535                 ( $bot ? EDIT_FORCE_BOT : 0 );
1536
1537                 $doEditStatus = $this->mArticle->doEditContent( $content, $this->summary, $flags, false, null, $this->content_format );
1538
1539             if ( $doEditStatus->isOK() ) {
1540                     $result['redirect'] = $content->isRedirect();
1541                 $this->commitWatch();
1542                 wfProfileOut( __METHOD__ );
1543                 return $status;
1544             } else {
1545                 $this->isConflict = true;
1546                 $doEditStatus->value = self::AS_END; // Destroys data doEdit() put in $status->value but who cares
1547                 wfProfileOut( __METHOD__ );
1548                 return $doEditStatus;
1549             }
1550                 } catch (MWContentSerializationException $ex) {
1551                         $status->fatal( 'content-failed-to-parse', $this->content_model, $this->content_format, $ex->getMessage() );
1552                         $status->value = self::AS_PARSE_ERROR;
1553                         wfProfileOut( __METHOD__ );
1554                         return $status;
1555                 }
1556         }
1557
1558         /**
1559          * Commit the change of watch status
1560          */
1561         protected function commitWatch() {
1562                 global $wgUser;
1563                 if ( $this->watchthis xor $this->mTitle->userIsWatching() ) {
1564                         $dbw = wfGetDB( DB_MASTER );
1565                         $dbw->begin( __METHOD__ );
1566                         if ( $this->watchthis ) {
1567                                 WatchAction::doWatch( $this->mTitle, $wgUser );
1568                         } else {
1569                                 WatchAction::doUnwatch( $this->mTitle, $wgUser );
1570                         }
1571                         $dbw->commit( __METHOD__ );
1572                 }
1573         }
1574
1575         /**
1576          * Check if no edits were made by other users since
1577          * the time a user started editing the page. Limit to
1578          * 50 revisions for the sake of performance.
1579          *
1580          * @param $id int
1581          * @param $edittime string
1582          *
1583          * @return bool
1584          */
1585         protected function userWasLastToEdit( $id, $edittime ) {
1586                 if ( !$id ) return false;
1587                 $dbw = wfGetDB( DB_MASTER );
1588                 $res = $dbw->select( 'revision',
1589                         'rev_user',
1590                         array(
1591                                 'rev_page' => $this->mTitle->getArticleID(),
1592                                 'rev_timestamp > ' . $dbw->addQuotes( $dbw->timestamp( $edittime ) )
1593                         ),
1594                         __METHOD__,
1595                         array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
1596                 foreach ( $res as $row ) {
1597                         if ( $row->rev_user != $id ) {
1598                                 return false;
1599                         }
1600                 }
1601                 return true;
1602         }
1603
1604     /**
1605      * @private
1606      * @todo document
1607      *
1608      * @parma $editText string
1609      *
1610      * @return bool
1611      * @deprecated since 1.20
1612      */
1613     function mergeChangesInto( &$editText ){
1614         wfDebug( __METHOD__, "1.20" );
1615
1616         $editContent = ContentHandler::makeContent( $editText, $this->getTitle(), $this->content_model, $this->content_format );
1617
1618         $ok = $this->mergeChangesIntoContent( $editContent );
1619
1620         if ( $ok ) {
1621             $editText = $editContent->serialize( $this->content_format ); #XXX: really serialize?!
1622             return true;
1623         } else {
1624             return false;
1625         }
1626     }
1627
1628     /**
1629      * @private
1630      * @todo document
1631      *
1632      * @parma $editText string
1633      *
1634      * @return bool
1635      * @since since 1.20
1636      */
1637     private function mergeChangesIntoContent( &$editContent ){
1638         wfProfileIn( __METHOD__ );
1639
1640         $db = wfGetDB( DB_MASTER );
1641
1642         // This is the revision the editor started from
1643         $baseRevision = $this->getBaseRevision();
1644         if ( is_null( $baseRevision ) ) {
1645             wfProfileOut( __METHOD__ );
1646             return false;
1647         }
1648         $baseContent = $baseRevision->getContent();
1649
1650         // The current state, we want to merge updates into it
1651         $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1652         if ( is_null( $currentRevision ) ) {
1653             wfProfileOut( __METHOD__ );
1654             return false;
1655         }
1656         $currentContent = $currentRevision->getContent();
1657
1658         $handler = ContentHandler::getForModelName( $baseContent->getModelName() );
1659
1660         $result = $handler->merge3( $baseContent, $editContent, $currentContent );
1661
1662         if ( $result ) {
1663             $editContent = $result;
1664             wfProfileOut( __METHOD__ );
1665             return true;
1666         } else {
1667             wfProfileOut( __METHOD__ );
1668             return false;
1669         }
1670     }
1671
1672         /**
1673          * @return Revision
1674          */
1675         function getBaseRevision() {
1676                 if ( !$this->mBaseRevision ) {
1677                         $db = wfGetDB( DB_MASTER );
1678                         $baseRevision = Revision::loadFromTimestamp(
1679                                 $db, $this->mTitle, $this->edittime );
1680                         return $this->mBaseRevision = $baseRevision;
1681                 } else {
1682                         return $this->mBaseRevision;
1683                 }
1684         }
1685
1686         /**
1687          * Check given input text against $wgSpamRegex, and return the text of the first match.
1688          *
1689          * @param $text string
1690          *
1691          * @return string|bool matching string or false
1692          */
1693         public static function matchSpamRegex( $text ) {
1694                 global $wgSpamRegex;
1695                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1696                 $regexes = (array)$wgSpamRegex;
1697                 return self::matchSpamRegexInternal( $text, $regexes );
1698         }
1699
1700         /**
1701          * Check given input text against $wgSpamRegex, and return the text of the first match.
1702          *
1703          * @parma $text string
1704          *
1705          * @return string|bool  matching string or false
1706          */
1707         public static function matchSummarySpamRegex( $text ) {
1708                 global $wgSummarySpamRegex;
1709                 $regexes = (array)$wgSummarySpamRegex;
1710                 return self::matchSpamRegexInternal( $text, $regexes );
1711         }
1712
1713         /**
1714          * @param $text string
1715          * @param $regexes array
1716          * @return bool|string
1717          */
1718         protected static function matchSpamRegexInternal( $text, $regexes ) {
1719                 foreach ( $regexes as $regex ) {
1720                         $matches = array();
1721                         if ( preg_match( $regex, $text, $matches ) ) {
1722                                 return $matches[0];
1723                         }
1724                 }
1725                 return false;
1726         }
1727
1728         function setHeaders() {
1729                 global $wgOut, $wgUser;
1730
1731                 $wgOut->addModules( 'mediawiki.action.edit' );
1732
1733                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
1734                         $wgOut->addModules( 'mediawiki.legacy.preview' );
1735                 }
1736                 // Bug #19334: textarea jumps when editing articles in IE8
1737                 $wgOut->addStyle( 'common/IE80Fixes.css', 'screen', 'IE 8' );
1738
1739                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1740
1741                 # Enabled article-related sidebar, toplinks, etc.
1742                 $wgOut->setArticleRelated( true );
1743
1744                 $contextTitle = $this->getContextTitle();
1745                 if ( $this->isConflict ) {
1746                         $msg = 'editconflict';
1747                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
1748                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1749                 } else {
1750                         $msg = $contextTitle->exists() || ( $contextTitle->getNamespace() == NS_MEDIAWIKI && $contextTitle->getDefaultMessageText() !== false ) ?
1751                                 'editing' : 'creating';
1752                 }
1753                 # Use the title defined by DISPLAYTITLE magic word when present
1754                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
1755                 if ( $displayTitle === false ) {
1756                         $displayTitle = $contextTitle->getPrefixedText();
1757                 }
1758                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
1759         }
1760
1761         /**
1762          * Show all applicable editing introductions
1763          */
1764         protected function showIntro() {
1765                 global $wgOut, $wgUser;
1766                 if ( $this->suppressIntro ) {
1767                         return;
1768                 }
1769
1770                 $namespace = $this->mTitle->getNamespace();
1771
1772                 if ( $namespace == NS_MEDIAWIKI ) {
1773                         # Show a warning if editing an interface message
1774                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
1775                 } else if( $namespace == NS_FILE ) {
1776                         # Show a hint to shared repo
1777                         $file = wfFindFile( $this->mTitle );
1778                         if( $file && !$file->isLocal() ) {
1779                                 $descUrl = $file->getDescriptionUrl();
1780                                 # there must be a description url to show a hint to shared repo
1781                                 if( $descUrl ) {
1782                                         if( !$this->mTitle->exists() ) {
1783                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array (
1784                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
1785                                                 ) );
1786                                         } else {
1787                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
1788                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
1789                                                 ) );
1790                                         }
1791                                 }
1792                         }
1793                 }
1794
1795                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
1796                 # Show log extract when the user is currently blocked
1797                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
1798                         $parts = explode( '/', $this->mTitle->getText(), 2 );
1799                         $username = $parts[0];
1800                         $user = User::newFromName( $username, false /* allow IP users*/ );
1801                         $ip = User::isIP( $username );
1802                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
1803                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
1804                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
1805                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
1806                                 LogEventsList::showLogExtract(
1807                                         $wgOut,
1808                                         'block',
1809                                         $user->getUserPage(),
1810                                         '',
1811                                         array(
1812                                                 'lim' => 1,
1813                                                 'showIfEmpty' => false,
1814                                                 'msgKey' => array(
1815                                                         'blocked-notice-logextract',
1816                                                         $user->getName() # Support GENDER in notice
1817                                                 )
1818                                         )
1819                                 );
1820                         }
1821                 }
1822                 # Try to add a custom edit intro, or use the standard one if this is not possible.
1823                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
1824                         if ( $wgUser->isLoggedIn() ) {
1825                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
1826                         } else {
1827                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
1828                         }
1829                 }
1830                 # Give a notice if the user is editing a deleted/moved page...
1831                 if ( !$this->mTitle->exists() ) {
1832                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
1833                                 '', array( 'lim' => 10,
1834                                            'conds' => array( "log_action != 'revision'" ),
1835                                            'showIfEmpty' => false,
1836                                            'msgKey' => array( 'recreate-moveddeleted-warn' ) )
1837                         );
1838                 }
1839         }
1840
1841         /**
1842          * Attempt to show a custom editing introduction, if supplied
1843          *
1844          * @return bool
1845          */
1846         protected function showCustomIntro() {
1847                 if ( $this->editintro ) {
1848                         $title = Title::newFromText( $this->editintro );
1849                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
1850                                 global $wgOut;
1851                                 // Added using template syntax, to take <noinclude>'s into account.
1852                                 $wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
1853                                 return true;
1854                         } else {
1855                                 return false;
1856                         }
1857                 } else {
1858                         return false;
1859                 }
1860         }
1861
1862         /**
1863          * Send the edit form and related headers to $wgOut
1864          * @param $formCallback Callback that takes an OutputPage parameter; will be called
1865          *     during form output near the top, for captchas and the like.
1866          */
1867         function showEditForm( $formCallback = null ) {
1868                 global $wgOut, $wgUser;
1869
1870                 wfProfileIn( __METHOD__ );
1871
1872                 # need to parse the preview early so that we know which templates are used,
1873                 # otherwise users with "show preview after edit box" will get a blank list
1874                 # we parse this near the beginning so that setHeaders can do the title
1875                 # setting work instead of leaving it in getPreviewText
1876                 $previewOutput = '';
1877                 if ( $this->formtype == 'preview' ) {
1878                         $previewOutput = $this->getPreviewText();
1879                 }
1880
1881                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
1882
1883                 $this->setHeaders();
1884
1885                 if ( $this->showHeader() === false ) {
1886                         wfProfileOut( __METHOD__ );
1887                         return;
1888                 }
1889
1890                 $wgOut->addHTML( $this->editFormPageTop );
1891
1892                 if ( $wgUser->getOption( 'previewontop' ) ) {
1893                         $this->displayPreviewArea( $previewOutput, true );
1894                 }
1895
1896                 $wgOut->addHTML( $this->editFormTextTop );
1897
1898                 $showToolbar = true;
1899                 if ( $this->wasDeletedSinceLastEdit() ) {
1900                         if ( $this->formtype == 'save' ) {
1901                                 // Hide the toolbar and edit area, user can click preview to get it back
1902                                 // Add an confirmation checkbox and explanation.
1903                                 $showToolbar = false;
1904                         } else {
1905                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
1906                                         'deletedwhileediting' );
1907                         }
1908                 }
1909
1910                 #FIXME: add EditForm plugin interface and use it here! #FIXME: search for textarea1 and textares2, and allow EditForm to override all uses.
1911                 $wgOut->addHTML( Html::openElement( 'form', array( 'id' => self::EDITFORM_ID, 'name' => self::EDITFORM_ID,
1912                         'method' => 'post', 'action' => $this->getActionURL( $this->getContextTitle() ),
1913                         'enctype' => 'multipart/form-data' ) ) );
1914
1915                 if ( is_callable( $formCallback ) ) {
1916                         call_user_func_array( $formCallback, array( &$wgOut ) );
1917                 }
1918
1919                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1920
1921                 // Put these up at the top to ensure they aren't lost on early form submission
1922                 $this->showFormBeforeText();
1923
1924                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
1925                         $username = $this->lastDelete->user_name;
1926                         $comment = $this->lastDelete->log_comment;
1927
1928                         // It is better to not parse the comment at all than to have templates expanded in the middle
1929                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
1930                         $key = $comment === ''
1931                                 ? 'confirmrecreate-noreason'
1932                                 : 'confirmrecreate';
1933                         $wgOut->addHTML(
1934                                 '<div class="mw-confirm-recreate">' .
1935                                 wfMsgExt( $key, 'parseinline', $username, "<nowiki>$comment</nowiki>" ) .
1936                                 Xml::checkLabel( wfMsg( 'recreate' ), 'wpRecreate', 'wpRecreate', false,
1937                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
1938                                 ) .
1939                                 '</div>'
1940                         );
1941                 }
1942
1943                 # When the summary is hidden, also hide them on preview/show changes
1944                 if( $this->nosummary ) {
1945                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
1946                 }
1947
1948                 # If a blank edit summary was previously provided, and the appropriate
1949                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1950                 # user being bounced back more than once in the event that a summary
1951                 # is not required.
1952                 #####
1953                 # For a bit more sophisticated detection of blank summaries, hash the
1954                 # automatic one and pass that in the hidden field wpAutoSummary.
1955                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
1956                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
1957                 }
1958
1959                 if ( $this->hasPresetSummary ) {
1960                         // If a summary has been preset using &summary= we dont want to prompt for
1961                         // a different summary. Only prompt for a summary if the summary is blanked.
1962                         // (Bug 17416)
1963                         $this->autoSumm = md5( '' );
1964                 }
1965
1966                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1967                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
1968
1969                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
1970
1971                 $wgOut->addHTML( Html::hidden( 'format', $this->content_format ) );
1972                 $wgOut->addHTML( Html::hidden( 'model', $this->content_model ) );
1973
1974                 if ( $this->section == 'new' ) {
1975                         $this->showSummaryInput( true, $this->summary );
1976                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
1977                 }
1978
1979                 $wgOut->addHTML( $this->editFormTextBeforeContent );
1980
1981                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
1982                         $wgOut->addHTML( EditPage::getEditToolbar() );
1983                 }
1984
1985                 if ( $this->isConflict ) {
1986                         // In an edit conflict bypass the overrideable content form method
1987                         // and fallback to the raw wpTextbox1 since editconflicts can't be
1988                         // resolved between page source edits and custom ui edits using the
1989                         // custom edit ui.
1990                         $this->textbox2 = $this->textbox1;
1991
1992                         $content = $this->getCurrentContent();
1993                         $this->textbox1 = $content->serialize( $this->content_format );
1994
1995                         $this->showTextbox1();
1996                 } else {
1997                         $this->showContentForm();
1998                 }
1999
2000                 $wgOut->addHTML( $this->editFormTextAfterContent );
2001
2002                 $wgOut->addWikiText( $this->getCopywarn() );
2003
2004                 $wgOut->addHTML( $this->editFormTextAfterWarn );
2005
2006                 $this->showStandardInputs();
2007
2008                 $this->showFormAfterText();
2009
2010                 $this->showTosSummary();
2011
2012                 $this->showEditTools();
2013
2014                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2015
2016                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2017                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2018
2019                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2020                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2021
2022                 if ( $this->isConflict ) {
2023                         $this->showConflict();
2024                 }
2025
2026                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2027
2028                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2029                         $this->displayPreviewArea( $previewOutput, false );
2030                 }
2031
2032                 wfProfileOut( __METHOD__ );
2033         }
2034
2035         /**
2036          * Extract the section title from current section text, if any.
2037          *
2038          * @param string $text
2039          * @return Mixed|string or false
2040          */
2041         public static function extractSectionTitle( $text ) {
2042                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2043                 if ( !empty( $matches[2] ) ) {
2044                         global $wgParser;
2045                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2046                 } else {
2047                         return false;
2048                 }
2049         }
2050
2051         protected function showHeader() {
2052                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2053
2054                 if ( $this->mTitle->isTalkPage() ) {
2055                         $wgOut->addWikiMsg( 'talkpagetext' );
2056                 }
2057
2058                 # Optional notices on a per-namespace and per-page basis
2059                 $editnotice_ns = 'editnotice-' . $this->mTitle->getNamespace();
2060                 $editnotice_ns_message = wfMessage( $editnotice_ns )->inContentLanguage();
2061                 if ( $editnotice_ns_message->exists() ) {
2062                         $wgOut->addWikiText( $editnotice_ns_message->plain() );
2063                 }
2064                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
2065                         $parts = explode( '/', $this->mTitle->getDBkey() );
2066                         $editnotice_base = $editnotice_ns;
2067                         while ( count( $parts ) > 0 ) {
2068                                 $editnotice_base .= '-' . array_shift( $parts );
2069                                 $editnotice_base_msg = wfMessage( $editnotice_base )->inContentLanguage();
2070                                 if ( $editnotice_base_msg->exists() ) {
2071                                         $wgOut->addWikiText( $editnotice_base_msg->plain() );
2072                                 }
2073                         }
2074                 } else {
2075                         # Even if there are no subpages in namespace, we still don't want / in MW ns.
2076                         $editnoticeText = $editnotice_ns . '-' . str_replace( '/', '-', $this->mTitle->getDBkey() );
2077                         $editnoticeMsg = wfMessage( $editnoticeText )->inContentLanguage();
2078                         if ( $editnoticeMsg->exists() ) {
2079                                 $wgOut->addWikiText( $editnoticeMsg->plain() );
2080                         }
2081                 }
2082
2083                 if ( $this->isConflict ) {
2084                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2085                         $this->edittime = $this->mArticle->getTimestamp();
2086                 } else {
2087                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2088                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2089                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2090                                 // Someone is welcome to try refactoring though
2091                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2092                                 return false;
2093                         }
2094
2095                         if ( $this->section != '' && $this->section != 'new' ) {
2096                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2097                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 );
2098                                         if ( $sectionTitle !== false ) {
2099                                                 $this->summary = "/* $sectionTitle */ ";
2100                                         }
2101                                 }
2102                         }
2103
2104                         if ( $this->missingComment ) {
2105                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2106                         }
2107
2108                         if ( $this->missingSummary && $this->section != 'new' ) {
2109                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2110                         }
2111
2112                         if ( $this->missingSummary && $this->section == 'new' ) {
2113                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2114                         }
2115
2116                         if ( $this->hookError !== '' ) {
2117                                 $wgOut->addWikiText( $this->hookError );
2118                         }
2119
2120                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2121                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2122                         }
2123
2124                         if ( $this->section != 'new' ) {
2125                                 $revision = $this->mArticle->getRevisionFetched();
2126                                 if ( $revision ) {
2127                                         // Let sysop know that this will make private content public if saved
2128
2129                                         if ( !$revision->userCan( Revision::DELETED_TEXT ) ) {
2130                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
2131                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2132                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
2133                                         }
2134
2135                                         if ( !$revision->isCurrent() ) {
2136                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2137                                                 $wgOut->addWikiMsg( 'editingold' );
2138                                         }
2139                                 } elseif ( $this->mTitle->exists() ) {
2140                                         // Something went wrong
2141
2142                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2143                                                 array( 'missing-article', $this->mTitle->getPrefixedText(),
2144                                                 wfMsgNoTrans( 'missingarticle-rev', $this->oldid ) ) );
2145                                 }
2146                         }
2147                 }
2148
2149                 if ( wfReadOnly() ) {
2150                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
2151                 } elseif ( $wgUser->isAnon() ) {
2152                         if ( $this->formtype != 'preview' ) {
2153                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
2154                         } else {
2155                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
2156                         }
2157                 } else {
2158                         if ( $this->isCssJsSubpage ) {
2159                                 # Check the skin exists
2160                                 if ( $this->isWrongCaseCssJsPage ) {
2161                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
2162                                 }
2163                                 if ( $this->formtype !== 'preview' ) {
2164                                         if ( $this->isCssSubpage )
2165                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
2166                                         if ( $this->isJsSubpage )
2167                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
2168                                 }
2169                         }
2170                 }
2171
2172                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2173                         # Is the title semi-protected?
2174                         if ( $this->mTitle->isSemiProtected() ) {
2175                                 $noticeMsg = 'semiprotectedpagewarning';
2176                         } else {
2177                                 # Then it must be protected based on static groups (regular)
2178                                 $noticeMsg = 'protectedpagewarning';
2179                         }
2180                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2181                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2182                 }
2183                 if ( $this->mTitle->isCascadeProtected() ) {
2184                         # Is this page under cascading protection from some source pages?
2185                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2186                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2187                         $cascadeSourcesCount = count( $cascadeSources );
2188                         if ( $cascadeSourcesCount > 0 ) {
2189                                 # Explain, and list the titles responsible
2190                                 foreach ( $cascadeSources as $page ) {
2191                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2192                                 }
2193                         }
2194                         $notice .= '</div>';
2195                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2196                 }
2197                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2198                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2199                                 array( 'lim' => 1,
2200                                         'showIfEmpty' => false,
2201                                         'msgKey' => array( 'titleprotectedwarning' ),
2202                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2203                 }
2204
2205                 if ( $this->kblength === false ) {
2206                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2207                 }
2208
2209                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2210                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2211                                 array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
2212                 } else {
2213                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2214                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2215                                         array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
2216                                 );
2217                         }
2218                 }
2219         }
2220
2221         /**
2222          * Standard summary input and label (wgSummary), abstracted so EditPage
2223          * subclasses may reorganize the form.
2224          * Note that you do not need to worry about the label's for=, it will be
2225          * inferred by the id given to the input. You can remove them both by
2226          * passing array( 'id' => false ) to $userInputAttrs.
2227          *
2228          * @param $summary string The value of the summary input
2229          * @param $labelText string The html to place inside the label
2230          * @param $inputAttrs array of attrs to use on the input
2231          * @param $spanLabelAttrs array of attrs to use on the span inside the label
2232          *
2233          * @return array An array in the format array( $label, $input )
2234          */
2235         function getSummaryInput( $summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null ) {
2236                 // Note: the maxlength is overriden in JS to 250 and to make it use UTF-8 bytes, not characters.
2237                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2238                         'id' => 'wpSummary',
2239                         'maxlength' => '200',
2240                         'tabindex' => '1',
2241                         'size' => 60,
2242                         'spellcheck' => 'true',
2243                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2244
2245                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2246                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2247                         'id' => "wpSummaryLabel"
2248                 );
2249
2250                 $label = null;
2251                 if ( $labelText ) {
2252                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
2253                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2254                 }
2255
2256                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2257
2258                 return array( $label, $input );
2259         }
2260
2261         /**
2262          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2263          *                          up top, or false if this is the comment summary
2264          *                          down below the textarea
2265          * @param $summary String: The text of the summary to display
2266          * @return String
2267          */
2268         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2269                 global $wgOut, $wgContLang;
2270                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2271                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2272                 if ( $isSubjectPreview ) {
2273                         if ( $this->nosummary ) {
2274                                 return;
2275                         }
2276                 } else {
2277                         if ( !$this->mShowSummaryField ) {
2278                                 return;
2279                         }
2280                 }
2281                 $summary = $wgContLang->recodeForEdit( $summary );
2282                 $labelText = wfMsgExt( $isSubjectPreview ? 'subject' : 'summary', 'parseinline' );
2283                 list( $label, $input ) = $this->getSummaryInput( $summary, $labelText, array( 'class' => $summaryClass ), array() );
2284                 $wgOut->addHTML( "{$label} {$input}" );
2285         }
2286
2287         /**
2288          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2289          *                          up top, or false if this is the comment summary
2290          *                          down below the textarea
2291          * @param $summary String: the text of the summary to display
2292          * @return String
2293          */
2294         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2295                 if ( !$summary || ( !$this->preview && !$this->diff ) )
2296                         return "";
2297
2298                 global $wgParser;
2299
2300                 if ( $isSubjectPreview )
2301                         $summary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $summary ) );
2302
2303                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2304
2305                 $summary = wfMsgExt( $message, 'parseinline' ) . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2306                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2307         }
2308
2309         protected function showFormBeforeText() {
2310                 global $wgOut;
2311                 $section = htmlspecialchars( $this->section );
2312                 $wgOut->addHTML( <<<HTML
2313 <input type='hidden' value="{$section}" name="wpSection" />
2314 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2315 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2316 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2317
2318 HTML
2319                 );
2320                 if ( !$this->checkUnicodeCompliantBrowser() )
2321                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2322         }
2323
2324         protected function showFormAfterText() {
2325                 global $wgOut, $wgUser;
2326                 /**
2327                  * To make it harder for someone to slip a user a page
2328                  * which submits an edit form to the wiki without their
2329                  * knowledge, a random token is associated with the login
2330                  * session. If it's not passed back with the submission,
2331                  * we won't save the page, or render user JavaScript and
2332                  * CSS previews.
2333                  *
2334                  * For anon editors, who may not have a session, we just
2335                  * include the constant suffix to prevent editing from
2336                  * broken text-mangling proxies.
2337                  */
2338                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2339         }
2340
2341         /**
2342          * Subpage overridable method for printing the form for page content editing
2343          * By default this simply outputs wpTextbox1
2344          * Subclasses can override this to provide a custom UI for editing;
2345          * be it a form, or simply wpTextbox1 with a modified content that will be
2346          * reverse modified when extracted from the post data.
2347          * Note that this is basically the inverse for importContentFormData
2348          */
2349         protected function showContentForm() {
2350                 $this->showTextbox1();
2351         }
2352
2353         /**
2354          * Method to output wpTextbox1
2355          * The $textoverride method can be used by subclasses overriding showContentForm
2356          * to pass back to this method.
2357          *
2358          * @param $customAttribs array of html attributes to use in the textarea
2359          * @param $textoverride String: optional text to override $this->textarea1 with
2360          */
2361         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2362                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2363                         $attribs = array( 'style' => 'display:none;' );
2364                 } else {
2365                         $classes = array(); // Textarea CSS
2366                         if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2367                                 # Is the title semi-protected?
2368                                 if ( $this->mTitle->isSemiProtected() ) {
2369                                         $classes[] = 'mw-textarea-sprotected';
2370                                 } else {
2371                                         # Then it must be protected based on static groups (regular)
2372                                         $classes[] = 'mw-textarea-protected';
2373                                 }
2374                                 # Is the title cascade-protected?
2375                                 if ( $this->mTitle->isCascadeProtected() ) {
2376                                         $classes[] = 'mw-textarea-cprotected';
2377                                 }
2378                         }
2379
2380                         $attribs = array( 'tabindex' => 1 );
2381
2382                         if ( is_array( $customAttribs ) ) {
2383                                 $attribs += $customAttribs;
2384                         }
2385
2386                         if ( count( $classes ) ) {
2387                                 if ( isset( $attribs['class'] ) ) {
2388                                         $classes[] = $attribs['class'];
2389                                 }
2390                                 $attribs['class'] = implode( ' ', $classes );
2391                         }
2392                 }
2393
2394                 $this->showTextbox( $textoverride !== null ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
2395         }
2396
2397         protected function showTextbox2() {
2398                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2399         }
2400
2401         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2402                 global $wgOut, $wgUser;
2403
2404                 $wikitext = $this->safeUnicodeOutput( $text );
2405                 if ( strval( $wikitext ) !== '' ) {
2406                         // Ensure there's a newline at the end, otherwise adding lines
2407                         // is awkward.
2408                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2409                         // mode will show an extra newline. A bit annoying.
2410                         $wikitext .= "\n";
2411                 }
2412
2413                 $attribs = $customAttribs + array(
2414                         'accesskey' => ',',
2415                         'id'   => $name,
2416                         'cols' => $wgUser->getIntOption( 'cols' ),
2417                         'rows' => $wgUser->getIntOption( 'rows' ),
2418                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
2419                 );
2420
2421                 $pageLang = $this->mTitle->getPageLanguage();
2422                 $attribs['lang'] = $pageLang->getCode();
2423                 $attribs['dir'] = $pageLang->getDir();
2424
2425                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2426         }
2427
2428         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2429                 global $wgOut;
2430                 $classes = array();
2431                 if ( $isOnTop )
2432                         $classes[] = 'ontop';
2433
2434                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2435
2436                 if ( $this->formtype != 'preview' )
2437                         $attribs['style'] = 'display: none;';
2438
2439                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2440
2441                 if ( $this->formtype == 'preview' ) {
2442                         $this->showPreview( $previewOutput );
2443                 }
2444
2445                 $wgOut->addHTML( '</div>' );
2446
2447                 if ( $this->formtype == 'diff' ) {
2448                         $this->showDiff();
2449                 }
2450         }
2451
2452         /**
2453          * Append preview output to $wgOut.
2454          * Includes category rendering if this is a category page.
2455          *
2456          * @param $text String: the HTML to be output for the preview.
2457          */
2458         protected function showPreview( $text ) {
2459                 global $wgOut;
2460                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2461                         $this->mArticle->openShowCategory();
2462                 }
2463                 # This hook seems slightly odd here, but makes things more
2464                 # consistent for extensions.
2465                 wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
2466                 $wgOut->addHTML( $text );
2467                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2468                         $this->mArticle->closeShowCategory();
2469                 }
2470         }
2471
2472         /**
2473          * Get a diff between the current contents of the edit box and the
2474          * version of the page we're editing from.
2475          *
2476          * If this is a section edit, we'll replace the section as for final
2477          * save and then make a comparison.
2478          */
2479         function showDiff() {
2480                 global $wgUser, $wgContLang, $wgParser, $wgOut;
2481
2482                 $oldtitlemsg = 'currentrev';
2483                 # if message does not exist, show diff against the preloaded default
2484                 if( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
2485                         $oldtext = $this->mTitle->getDefaultMessageText();
2486                         if( $oldtext !== false ) {
2487                                 $oldtitlemsg = 'defaultmessagetext';
2488                                 $oldContent = ContentHandler::makeContent( $oldtext, $this->mTitle );
2489                         } else {
2490                                 $oldContent = null;
2491                         }
2492                 } else {
2493                         $oldContent = $this->getOriginalContent();
2494                 }
2495
2496         $textboxContent = ContentHandler::makeContent( $this->textbox1, $this->getTitle(),
2497                                                                                                                 $this->content_model, $this->content_format ); #XXX: handle parse errors ?
2498
2499         $newContent = $this->mArticle->replaceSectionContent(
2500                                                     $this->section, $textboxContent,
2501                                                     $this->summary, $this->edittime );
2502
2503         # hanlde legacy text-based hook
2504         $newtext_orig = $newContent->serialize( $this->content_format );
2505         $newtext = $newtext_orig; #clone
2506         wfRunHooks( 'EditPageGetDiffText', array( $this, &$newtext ) );
2507
2508                 if ( $newtext != $newtext_orig ) {
2509                                 #if the hook changed the text, create a new Content object accordingly.
2510                                 $newContent = ContentHandler::makeContent( $newtext, $this->getTitle(), $newContent->getModelName() ); #XXX: handle parse errors ?
2511                 }
2512
2513                 wfRunHooks( 'EditPageGetDiffContent', array( $this, &$newContent ) ); #FIXME: document new hook
2514
2515                 $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
2516         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
2517
2518         if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
2519                         $oldtitle = wfMsgExt( $oldtitlemsg, array( 'parseinline' ) );
2520                         $newtitle = wfMsgExt( 'yourtext', array( 'parseinline' ) );
2521
2522             $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
2523             $de->setContent( $oldContent, $newContent );
2524
2525                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2526                         $de->showDiffStyle();
2527                 } else {
2528                         $difftext = '';
2529                 }
2530
2531                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2532         }
2533
2534         /**
2535          * Give a chance for site and per-namespace customizations of
2536          * terms of service summary link that might exist separately
2537          * from the copyright notice.
2538          *
2539          * This will display between the save button and the edit tools,
2540          * so should remain short!
2541          */
2542         protected function showTosSummary() {
2543                 $msg = 'editpage-tos-summary';
2544                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
2545                 if ( !wfMessage( $msg )->isDisabled() ) {
2546                         global $wgOut;
2547                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
2548                         $wgOut->addWikiMsg( $msg );
2549                         $wgOut->addHTML( '</div>' );
2550                 }
2551         }
2552
2553         protected function showEditTools() {
2554                 global $wgOut;
2555                 $wgOut->addHTML( '<div class="mw-editTools">' .
2556                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
2557                         '</div>' );
2558         }
2559
2560         protected function getCopywarn() {
2561                 global $wgRightsText;
2562                 if ( $wgRightsText ) {
2563                         $copywarnMsg = array( 'copyrightwarning',
2564                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
2565                                 $wgRightsText );
2566                 } else {
2567                         $copywarnMsg = array( 'copyrightwarning2',
2568                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
2569                 }
2570                 // Allow for site and per-namespace customization of contribution/copyright notice.
2571                 wfRunHooks( 'EditPageCopyrightWarning', array( $this->mTitle, &$copywarnMsg ) );
2572
2573                 return "<div id=\"editpage-copywarn\">\n" .
2574                         call_user_func_array( "wfMsgNoTrans", $copywarnMsg ) . "\n</div>";
2575         }
2576
2577         protected function showStandardInputs( &$tabindex = 2 ) {
2578                 global $wgOut;
2579                 $wgOut->addHTML( "<div class='editOptions'>\n" );
2580
2581                 if ( $this->section != 'new' ) {
2582                         $this->showSummaryInput( false, $this->summary );
2583                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
2584                 }
2585
2586                 $checkboxes = $this->getCheckboxes( $tabindex,
2587                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
2588                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
2589                 $wgOut->addHTML( "<div class='editButtons'>\n" );
2590                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
2591
2592                 $cancel = $this->getCancelLink();
2593                 if ( $cancel !== '' ) {
2594                         $cancel .= wfMsgExt( 'pipe-separator' , 'escapenoentities' );
2595                 }
2596                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ) );
2597                 $edithelp = '<a target="helpwindow" href="' . $edithelpurl . '">' .
2598                         htmlspecialchars( wfMsg( 'edithelp' ) ) . '</a> ' .
2599                         htmlspecialchars( wfMsg( 'newwindow' ) );
2600                 $wgOut->addHTML( "      <span class='editHelp'>{$cancel}{$edithelp}</span>\n" );
2601                 $wgOut->addHTML( "</div><!-- editButtons -->\n</div><!-- editOptions -->\n" );
2602         }
2603
2604         /**
2605          * Show an edit conflict. textbox1 is already shown in showEditForm().
2606          * If you want to use another entry point to this function, be careful.
2607          */
2608         protected function showConflict() {
2609                 global $wgOut;
2610
2611                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
2612                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2613
2614                         $content1 = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format ); #XXX: handle parse errors?
2615                         $content2 = ContentHandler::makeContent( $this->textbox2, $this->getTitle(), $this->content_model, $this->content_format ); #XXX: handle parse errors?
2616
2617                         $handler = ContentHandler::getForModelName( $this->content_model );
2618                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
2619                         $de->setContent( $content2, $content1 );
2620                         $de->showDiff( wfMsgExt( 'yourtext', 'parseinline' ), wfMsg( 'storedversion' ) );
2621
2622                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2623                         $this->showTextbox2();
2624                 }
2625         }
2626
2627         /**
2628          * @return string
2629          */
2630         public function getCancelLink() {
2631                 $cancelParams = array();
2632                 if ( !$this->isConflict && $this->oldid > 0 ) {
2633                         $cancelParams['oldid'] = $this->oldid;
2634                 }
2635
2636                 return Linker::linkKnown(
2637                         $this->getContextTitle(),
2638                         wfMsgExt( 'cancel', array( 'parseinline' ) ),
2639                         array( 'id' => 'mw-editform-cancel' ),
2640                         $cancelParams
2641                 );
2642         }
2643
2644         /**
2645          * Returns the URL to use in the form's action attribute.
2646          * This is used by EditPage subclasses when simply customizing the action
2647          * variable in the constructor is not enough. This can be used when the
2648          * EditPage lives inside of a Special page rather than a custom page action.
2649          *
2650          * @param $title Title object for which is being edited (where we go to for &action= links)
2651          * @return string
2652          */
2653         protected function getActionURL( Title $title ) {
2654                 return $title->getLocalURL( array( 'action' => $this->action ) );
2655         }
2656
2657         /**
2658          * Check if a page was deleted while the user was editing it, before submit.
2659          * Note that we rely on the logging table, which hasn't been always there,
2660          * but that doesn't matter, because this only applies to brand new
2661          * deletes.
2662          */
2663         protected function wasDeletedSinceLastEdit() {
2664                 if ( $this->deletedSinceEdit !== null ) {
2665                         return $this->deletedSinceEdit;
2666                 }
2667
2668                 $this->deletedSinceEdit = false;
2669
2670                 if ( $this->mTitle->isDeletedQuick() ) {
2671                         $this->lastDelete = $this->getLastDelete();
2672                         if ( $this->lastDelete ) {
2673                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
2674                                 if ( $deleteTime > $this->starttime ) {
2675                                         $this->deletedSinceEdit = true;
2676                                 }
2677                         }
2678                 }
2679
2680                 return $this->deletedSinceEdit;
2681         }
2682
2683         protected function getLastDelete() {
2684                 $dbr = wfGetDB( DB_SLAVE );
2685                 $data = $dbr->selectRow(
2686                         array( 'logging', 'user' ),
2687                         array( 'log_type',
2688                                    'log_action',
2689                                    'log_timestamp',
2690                                    'log_user',
2691                                    'log_namespace',
2692                                    'log_title',
2693                                    'log_comment',
2694                                    'log_params',
2695                                    'log_deleted',
2696                                    'user_name' ),
2697                         array( 'log_namespace' => $this->mTitle->getNamespace(),
2698                                    'log_title' => $this->mTitle->getDBkey(),
2699                                    'log_type' => 'delete',
2700                                    'log_action' => 'delete',
2701                                    'user_id=log_user' ),
2702                         __METHOD__,
2703                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
2704                 );
2705                 // Quick paranoid permission checks...
2706                 if ( is_object( $data ) ) {
2707                         if ( $data->log_deleted & LogPage::DELETED_USER )
2708                                 $data->user_name = wfMsgHtml( 'rev-deleted-user' );
2709                         if ( $data->log_deleted & LogPage::DELETED_COMMENT )
2710                                 $data->log_comment = wfMsgHtml( 'rev-deleted-comment' );
2711                 }
2712                 return $data;
2713         }
2714
2715         /**
2716          * Get the rendered text for previewing.
2717          * @return string
2718          */
2719         function getPreviewText() {
2720                 global $wgOut, $wgUser, $wgParser, $wgRawHtml, $wgLang;
2721
2722                 wfProfileIn( __METHOD__ );
2723
2724                 if ( $wgRawHtml && !$this->mTokenOk ) {
2725                         // Could be an offsite preview attempt. This is very unsafe if
2726                         // HTML is enabled, as it could be an attack.
2727                         $parsedNote = '';
2728                         if ( $this->textbox1 !== '' ) {
2729                                 // Do not put big scary notice, if previewing the empty
2730                                 // string, which happens when you initially edit
2731                                 // a category page, due to automatic preview-on-open.
2732                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
2733                                         wfMsg( 'session_fail_preview_html' ) . "</div>", true, /* interface */true );
2734                         }
2735                         wfProfileOut( __METHOD__ );
2736                         return $parsedNote;
2737                 }
2738
2739                 $note = '';
2740
2741         try {
2742                     $content = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format );
2743
2744                         if ( $this->mTriedSave && !$this->mTokenOk ) {
2745                                 if ( $this->mTokenOkExceptSuffix ) {
2746                                         $note = wfMsg( 'token_suffix_mismatch' );
2747                                 } else {
2748                                         $note = wfMsg( 'session_fail_preview' );
2749                                 }
2750                         } elseif ( $this->incompleteForm ) {
2751                                 $note = wfMsg( 'edit_form_incomplete' );
2752                         } else {
2753                                 $note = wfMsg( 'previewnote' ) .
2754                                         ' [[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' . wfMsg( 'continue-editing' ) . ']]';
2755                         }
2756
2757             $parserOptions = ParserOptions::newFromUser( $wgUser );
2758             $parserOptions->setEditSection( false );
2759             $parserOptions->setTidy( true );
2760             $parserOptions->setIsPreview( true );
2761             $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
2762
2763                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
2764                 # don't parse non-wikitext pages, show message about preview
2765                 if( $this->mTitle->isCssJsSubpage() ) {
2766                     $level = 'user';
2767                 } elseif( $this->mTitle->isCssOrJsPage() ) {
2768                     $level = 'site';
2769                 } else {
2770                     $level = false;
2771                 }
2772
2773                 if ( $content->getModelName() == CONTENT_MODEL_CSS ) {
2774                     $format = 'css';
2775                 } elseif ( $content->getModelName() == CONTENT_MODEL_JAVASCRIPT ) {
2776                     $format = 'js';
2777                 } else {
2778                     $format = false;
2779                 }
2780
2781                 # Used messages to make sure grep find them:
2782                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
2783                 if( $level && $format ) {
2784                     $note = "<div id='mw-{$level}{$format}preview'>" . wfMsg( "{$level}{$format}preview" ) . "</div>";
2785                 } else {
2786                     $note = wfMsg( 'previewnote' );
2787                 }
2788             } else {
2789                 $note = wfMsg( 'previewnote' );
2790             }
2791
2792             $rt = $content->getRedirectChain();
2793
2794             if ( $rt ) {
2795                 $previewHTML = $this->mArticle->viewRedirect( $rt, false );
2796             } else {
2797
2798                 # If we're adding a comment, we need to show the
2799                 # summary as the headline
2800                 if ( $this->section == "new" && $this->summary != "" ) {
2801                     $content = $content->addSectionHeader( $this->summary );
2802                 }
2803
2804                 $toparse_orig = $content->serialize( $this->content_format );
2805                 $toparse = $toparse_orig;
2806                 wfRunHooks( 'EditPageGetPreviewText', array( $this, &$toparse ) );
2807
2808                 if ( $toparse !== $toparse_orig ) {
2809                     #hook changed the text, create new Content object
2810                     $content = ContentHandler::makeContent( $toparse, $this->getTitle(), $this->content_model, $this->content_format );
2811                 }
2812
2813                 wfRunHooks( 'EditPageGetPreviewContent', array( $this, &$content ) ); # FIXME: document new hook
2814
2815                 $parserOptions->enableLimitReport();
2816
2817                 #XXX: For CSS/JS pages, we should have called the ShowRawCssJs hook here. But it's now deprecated, so never mind
2818                 $content = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
2819
2820                                 // TODO: might be a saner way to get a meaningfull context here?
2821                 $parserOutput = $content->getParserOutput( $this->getArticle()->getContext(), null, $parserOptions );
2822
2823                 $previewHTML = $parserOutput->getText();
2824                 $this->mParserOutput = $parserOutput;
2825                 $wgOut->addParserOutputNoText( $parserOutput );
2826
2827                 if ( count( $parserOutput->getWarnings() ) ) {
2828                     $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
2829                 }
2830             }
2831         } catch (MWContentSerializationException $ex) {
2832             $note .= "\n\n" . wfMsg('content-failed-to-parse', $this->content_model, $this->content_format, $ex->getMessage() );
2833             $previewHTML = '';
2834         }
2835
2836                 if ( $this->isConflict ) {
2837                         $conflict = '<h2 id="mw-previewconflict">' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
2838                 } else {
2839                         $conflict = '<hr />';
2840                 }
2841
2842                 $previewhead = "<div class='previewnote'>\n" .
2843                         '<h2 id="mw-previewheader">' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>" .
2844                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
2845
2846                 $pageLang = $this->mTitle->getPageLanguage();
2847                 $attribs = array( 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
2848                         'class' => 'mw-content-' . $pageLang->getDir() );
2849                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
2850
2851                 wfProfileOut( __METHOD__ );
2852                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
2853         }
2854
2855         /**
2856          * @return Array
2857          */
2858         function getTemplates() {
2859                 if ( $this->preview || $this->section != '' ) {
2860                         $templates = array();
2861                         if ( !isset( $this->mParserOutput ) ) {
2862                                 return $templates;
2863                         }
2864                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
2865                                 foreach ( array_keys( $template ) as $dbk ) {
2866                                         $templates[] = Title::makeTitle( $ns, $dbk );
2867                                 }
2868                         }
2869                         return $templates;
2870                 } else {
2871                         return $this->mTitle->getTemplateLinksFrom();
2872                 }
2873         }
2874
2875         /**
2876          * Shows a bulletin board style toolbar for common editing functions.
2877          * It can be disabled in the user preferences.
2878          * The necessary JavaScript code can be found in skins/common/edit.js.
2879          *
2880          * @return string
2881          */
2882         static function getEditToolbar() {
2883                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
2884                 global $wgUseTeX, $wgEnableUploads, $wgForeignFileRepos;
2885
2886                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
2887
2888                 /**
2889                  * $toolarray is an array of arrays each of which includes the
2890                  * filename of the button image (without path), the opening
2891                  * tag, the closing tag, optionally a sample text that is
2892                  * inserted between the two when no selection is highlighted
2893                  * and.  The tip text is shown when the user moves the mouse
2894                  * over the button.
2895                  *
2896                  * Also here: accesskeys (key), which are not used yet until
2897                  * someone can figure out a way to make them work in
2898                  * IE. However, we should make sure these keys are not defined
2899                  * on the edit page.
2900                  */
2901                 $toolarray = array(
2902                         array(
2903                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
2904                                 'id'     => 'mw-editbutton-bold',
2905                                 'open'   => '\'\'\'',
2906                                 'close'  => '\'\'\'',
2907                                 'sample' => wfMsg( 'bold_sample' ),
2908                                 'tip'    => wfMsg( 'bold_tip' ),
2909                                 'key'    => 'B'
2910                         ),
2911                         array(
2912                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
2913                                 'id'     => 'mw-editbutton-italic',
2914                                 'open'   => '\'\'',
2915                                 'close'  => '\'\'',
2916                                 'sample' => wfMsg( 'italic_sample' ),
2917                                 'tip'    => wfMsg( 'italic_tip' ),
2918                                 'key'    => 'I'
2919                         ),
2920                         array(
2921                                 'image'  => $wgLang->getImageFile( 'button-link' ),
2922                                 'id'     => 'mw-editbutton-link',
2923                                 'open'   => '[[',
2924                                 'close'  => ']]',
2925                                 'sample' => wfMsg( 'link_sample' ),
2926                                 'tip'    => wfMsg( 'link_tip' ),
2927                                 'key'    => 'L'
2928                         ),
2929                         array(
2930                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
2931                                 'id'     => 'mw-editbutton-extlink',
2932                                 'open'   => '[',
2933                                 'close'  => ']',
2934                                 'sample' => wfMsg( 'extlink_sample' ),
2935                                 'tip'    => wfMsg( 'extlink_tip' ),
2936                                 'key'    => 'X'
2937                         ),
2938                         array(
2939                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
2940                                 'id'     => 'mw-editbutton-headline',
2941                                 'open'   => "\n== ",
2942                                 'close'  => " ==\n",
2943                                 'sample' => wfMsg( 'headline_sample' ),
2944                                 'tip'    => wfMsg( 'headline_tip' ),
2945                                 'key'    => 'H'
2946                         ),
2947                         $imagesAvailable ? array(
2948                                 'image'  => $wgLang->getImageFile( 'button-image' ),
2949                                 'id'     => 'mw-editbutton-image',
2950                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
2951                                 'close'  => ']]',
2952                                 'sample' => wfMsg( 'image_sample' ),
2953                                 'tip'    => wfMsg( 'image_tip' ),
2954                                 'key'    => 'D',
2955                         ) : false,
2956                         $imagesAvailable ? array(
2957                                 'image'  => $wgLang->getImageFile( 'button-media' ),
2958                                 'id'     => 'mw-editbutton-media',
2959                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
2960                                 'close'  => ']]',
2961                                 'sample' => wfMsg( 'media_sample' ),
2962                                 'tip'    => wfMsg( 'media_tip' ),
2963                                 'key'    => 'M'
2964                         ) : false,
2965                         $wgUseTeX ? array(
2966                                 'image'  => $wgLang->getImageFile( 'button-math' ),
2967                                 'id'     => 'mw-editbutton-math',
2968                                 'open'   => "<math>",
2969                                 'close'  => "</math>",
2970                                 'sample' => wfMsg( 'math_sample' ),
2971                                 'tip'    => wfMsg( 'math_tip' ),
2972                                 'key'    => 'C'
2973                         ) : false,
2974                         array(
2975                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
2976                                 'id'     => 'mw-editbutton-nowiki',
2977                                 'open'   => "<nowiki>",
2978                                 'close'  => "</nowiki>",
2979                                 'sample' => wfMsg( 'nowiki_sample' ),
2980                                 'tip'    => wfMsg( 'nowiki_tip' ),
2981                                 'key'    => 'N'
2982                         ),
2983                         array(
2984                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
2985                                 'id'     => 'mw-editbutton-signature',
2986                                 'open'   => '--~~~~',
2987                                 'close'  => '',
2988                                 'sample' => '',
2989                                 'tip'    => wfMsg( 'sig_tip' ),
2990                                 'key'    => 'Y'
2991                         ),
2992                         array(
2993                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
2994                                 'id'     => 'mw-editbutton-hr',
2995                                 'open'   => "\n----\n",
2996                                 'close'  => '',
2997                                 'sample' => '',
2998                                 'tip'    => wfMsg( 'hr_tip' ),
2999                                 'key'    => 'R'
3000                         )
3001                 );
3002
3003                 $script = 'mw.loader.using("mediawiki.action.edit", function() {';
3004                 foreach ( $toolarray as $tool ) {
3005                         if ( !$tool ) {
3006                                 continue;
3007                         }
3008
3009                         $params = array(
3010                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
3011                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3012                                 // Older browsers show a "speedtip" type message only for ALT.
3013                                 // Ideally these should be different, realistically they
3014                                 // probably don't need to be.
3015                                 $tip = $tool['tip'],
3016                                 $open = $tool['open'],
3017                                 $close = $tool['close'],
3018                                 $sample = $tool['sample'],
3019                                 $cssId = $tool['id'],
3020                         );
3021
3022                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
3023                 }
3024
3025                 // This used to be called on DOMReady from mediawiki.action.edit, which
3026                 // ended up causing race conditions with the setup code above.
3027                 $script .= "\n" .
3028                         "// Create button bar\n" .
3029                         "$(function() { mw.toolbar.init(); } );\n";
3030
3031                 $script .= '});';
3032                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3033
3034                 $toolbar = '<div id="toolbar"></div>';
3035
3036                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3037
3038                 return $toolbar;
3039         }
3040
3041         /**
3042          * Returns an array of html code of the following checkboxes:
3043          * minor and watch
3044          *
3045          * @param $tabindex int Current tabindex
3046          * @param $checked Array of checkbox => bool, where bool indicates the checked
3047          *                 status of the checkbox
3048          *
3049          * @return array
3050          */
3051         public function getCheckboxes( &$tabindex, $checked ) {
3052                 global $wgUser;
3053
3054                 $checkboxes = array();
3055
3056                 // don't show the minor edit checkbox if it's a new page or section
3057                 if ( !$this->isNew ) {
3058                         $checkboxes['minor'] = '';
3059                         $minorLabel = wfMsgExt( 'minoredit', array( 'parseinline' ) );
3060                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3061                                 $attribs = array(
3062                                         'tabindex'  => ++$tabindex,
3063                                         'accesskey' => wfMsg( 'accesskey-minoredit' ),
3064                                         'id'        => 'wpMinoredit',
3065                                 );
3066                                 $checkboxes['minor'] =
3067                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3068                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3069                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3070                                         ">{$minorLabel}</label>";
3071                         }
3072                 }
3073
3074                 $watchLabel = wfMsgExt( 'watchthis', array( 'parseinline' ) );
3075                 $checkboxes['watch'] = '';
3076                 if ( $wgUser->isLoggedIn() ) {
3077                         $attribs = array(
3078                                 'tabindex'  => ++$tabindex,
3079                                 'accesskey' => wfMsg( 'accesskey-watch' ),
3080                                 'id'        => 'wpWatchthis',
3081                         );
3082                         $checkboxes['watch'] =
3083                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3084                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3085                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3086                                 ">{$watchLabel}</label>";
3087                 }
3088                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3089                 return $checkboxes;
3090         }
3091
3092         /**
3093          * Returns an array of html code of the following buttons:
3094          * save, diff, preview and live
3095          *
3096          * @param $tabindex int Current tabindex
3097          *
3098          * @return array
3099          */
3100         public function getEditButtons( &$tabindex ) {
3101                 $buttons = array();
3102
3103                 $temp = array(
3104                         'id'        => 'wpSave',
3105                         'name'      => 'wpSave',
3106                         'type'      => 'submit',
3107                         'tabindex'  => ++$tabindex,
3108                         'value'     => wfMsg( 'savearticle' ),
3109                         'accesskey' => wfMsg( 'accesskey-save' ),
3110                         'title'     => wfMsg( 'tooltip-save' ) . ' [' . wfMsg( 'accesskey-save' ) . ']',
3111                 );
3112                 $buttons['save'] = Xml::element( 'input', $temp, '' );
3113
3114                 ++$tabindex; // use the same for preview and live preview
3115                 $temp = array(
3116                         'id'        => 'wpPreview',
3117                         'name'      => 'wpPreview',
3118                         'type'      => 'submit',
3119                         'tabindex'  => $tabindex,
3120                         'value'     => wfMsg( 'showpreview' ),
3121                         'accesskey' => wfMsg( 'accesskey-preview' ),
3122                         'title'     => wfMsg( 'tooltip-preview' ) . ' [' . wfMsg( 'accesskey-preview' ) . ']',
3123                 );
3124                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
3125                 $buttons['live'] = '';
3126
3127                 $temp = array(
3128                         'id'        => 'wpDiff',
3129                         'name'      => 'wpDiff',
3130                         'type'      => 'submit',
3131                         'tabindex'  => ++$tabindex,
3132                         'value'     => wfMsg( 'showdiff' ),
3133                         'accesskey' => wfMsg( 'accesskey-diff' ),
3134                         'title'     => wfMsg( 'tooltip-diff' ) . ' [' . wfMsg( 'accesskey-diff' ) . ']',
3135                 );
3136                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
3137
3138                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3139                 return $buttons;
3140         }
3141
3142         /**
3143          * Output preview text only. This can be sucked into the edit page
3144          * via JavaScript, and saves the server time rendering the skin as
3145          * well as theoretically being more robust on the client (doesn't
3146          * disturb the edit box's undo history, won't eat your text on
3147          * failure, etc).
3148          *
3149          * @todo This doesn't include category or interlanguage links.
3150          *       Would need to enhance it a bit, <s>maybe wrap them in XML
3151          *       or something...</s> that might also require more skin
3152          *       initialization, so check whether that's a problem.
3153          */
3154         function livePreview() {
3155                 global $wgOut;
3156                 $wgOut->disable();
3157                 header( 'Content-type: text/xml; charset=utf-8' );
3158                 header( 'Cache-control: no-cache' );
3159
3160                 $previewText = $this->getPreviewText();
3161                 #$categories = $skin->getCategoryLinks();
3162
3163                 $s =
3164                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3165                 Xml::tags( 'livepreview', null,
3166                         Xml::element( 'preview', null, $previewText )
3167                         #.      Xml::element( 'category', null, $categories )
3168                 );
3169                 echo $s;
3170         }
3171
3172         /**
3173          * Call the stock "user is blocked" page
3174          *
3175          * @deprecated in 1.19; throw an exception directly instead
3176          */
3177         function blockedPage() {
3178                 wfDeprecated( __METHOD__, '1.19' );
3179                 global $wgUser;
3180
3181                 throw new UserBlockedError( $wgUser->getBlock() );
3182         }
3183
3184         /**
3185          * Produce the stock "please login to edit pages" page
3186          *
3187          * @deprecated in 1.19; throw an exception directly instead
3188          */
3189         function userNotLoggedInPage() {
3190                 wfDeprecated( __METHOD__, '1.19' );
3191                 throw new PermissionsError( 'edit' );
3192         }
3193
3194         /**
3195          * Show an error page saying to the user that he has insufficient permissions
3196          * to create a new page
3197          *
3198          * @deprecated in 1.19; throw an exception directly instead
3199          */
3200         function noCreatePermission() {
3201                 wfDeprecated( __METHOD__, '1.19' );
3202                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
3203                 throw new PermissionsError( $permission );
3204         }
3205
3206         /**
3207          * Creates a basic error page which informs the user that
3208          * they have attempted to edit a nonexistent section.
3209          */
3210         function noSuchSectionPage() {
3211                 global $wgOut;
3212
3213                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3214
3215                 $res = wfMsgExt( 'nosuchsectiontext', 'parse', $this->section );
3216                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
3217                 $wgOut->addHTML( $res );
3218
3219                 $wgOut->returnToMain( false, $this->mTitle );
3220         }
3221
3222         /**
3223          * Produce the stock "your edit contains spam" page
3224          *
3225          * @param $match string Text which triggered one or more filters
3226          * @deprecated since 1.17 Use method spamPageWithContent() instead
3227          */
3228         static function spamPage( $match = false ) {
3229                 wfDeprecated( __METHOD__, '1.17' );
3230
3231                 global $wgOut, $wgTitle;
3232
3233                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3234
3235                 $wgOut->addHTML( '<div id="spamprotected">' );
3236                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3237                 if ( $match ) {
3238                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3239                 }
3240                 $wgOut->addHTML( '</div>' );
3241
3242                 $wgOut->returnToMain( false, $wgTitle );
3243         }
3244
3245         /**
3246          * Show "your edit contains spam" page with your diff and text
3247          *
3248          * @param $match string|Array|bool Text (or array of texts) which triggered one or more filters
3249          */
3250         public function spamPageWithContent( $match = false ) {
3251                 global $wgOut, $wgLang;
3252                 $this->textbox2 = $this->textbox1;
3253
3254                 if( is_array( $match ) ){
3255                         $match = $wgLang->listToText( $match );
3256                 }
3257                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3258
3259                 $wgOut->addHTML( '<div id="spamprotected">' );
3260                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3261                 if ( $match ) {
3262                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3263                 }
3264                 $wgOut->addHTML( '</div>' );
3265
3266                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3267                 $this->showDiff();
3268
3269                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3270                 $this->showTextbox2();
3271
3272                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3273         }
3274
3275         /**
3276          * Format an anchor fragment as it would appear for a given section name
3277          * @param $text String
3278          * @return String
3279          * @private
3280          */
3281         function sectionAnchor( $text ) {
3282                 global $wgParser;
3283                 return $wgParser->guessSectionNameFromWikiText( $text );
3284         }
3285
3286         /**
3287          * Check if the browser is on a blacklist of user-agents known to
3288          * mangle UTF-8 data on form submission. Returns true if Unicode
3289          * should make it through, false if it's known to be a problem.
3290          * @return bool
3291          * @private
3292          */
3293         function checkUnicodeCompliantBrowser() {
3294                 global $wgBrowserBlackList;
3295                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
3296                         // No User-Agent header sent? Trust it by default...
3297                         return true;
3298                 }
3299                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
3300                 foreach ( $wgBrowserBlackList as $browser ) {
3301                         if ( preg_match( $browser, $currentbrowser ) ) {
3302                                 return false;
3303                         }
3304                 }
3305                 return true;
3306         }
3307
3308         /**
3309          * Filter an input field through a Unicode de-armoring process if it
3310          * came from an old browser with known broken Unicode editing issues.
3311          *
3312          * @param $request WebRequest
3313          * @param $field String
3314          * @return String
3315          * @private
3316          */
3317         function safeUnicodeInput( $request, $field ) {
3318                 $text = rtrim( $request->getText( $field ) );
3319                 return $request->getBool( 'safemode' )
3320                         ? $this->unmakesafe( $text )
3321                         : $text;
3322         }
3323
3324         /**
3325          * @param $request WebRequest
3326          * @param $text string
3327          * @return string
3328          */
3329         function safeUnicodeText( $request, $text ) {
3330                 $text = rtrim( $text );
3331                 return $request->getBool( 'safemode' )
3332                         ? $this->unmakesafe( $text )
3333                         : $text;
3334         }
3335
3336         /**
3337          * Filter an output field through a Unicode armoring process if it is
3338          * going to an old browser with known broken Unicode editing issues.
3339          *
3340          * @param $text String
3341          * @return String
3342          * @private
3343          */
3344         function safeUnicodeOutput( $text ) {
3345                 global $wgContLang;
3346                 $codedText = $wgContLang->recodeForEdit( $text );
3347                 return $this->checkUnicodeCompliantBrowser()
3348                         ? $codedText
3349                         : $this->makesafe( $codedText );
3350         }
3351
3352         /**
3353          * A number of web browsers are known to corrupt non-ASCII characters
3354          * in a UTF-8 text editing environment. To protect against this,
3355          * detected browsers will be served an armored version of the text,
3356          * with non-ASCII chars converted to numeric HTML character references.
3357          *
3358          * Preexisting such character references will have a 0 added to them
3359          * to ensure that round-trips do not alter the original data.
3360          *
3361          * @param $invalue String
3362          * @return String
3363          * @private
3364          */
3365         function makesafe( $invalue ) {
3366                 // Armor existing references for reversability.
3367                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
3368
3369                 $bytesleft = 0;
3370                 $result = "";
3371                 $working = 0;
3372                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3373                         $bytevalue = ord( $invalue[$i] );
3374                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
3375                                 $result .= chr( $bytevalue );
3376                                 $bytesleft = 0;
3377                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
3378                                 $working = $working << 6;
3379                                 $working += ( $bytevalue & 0x3F );
3380                                 $bytesleft--;
3381                                 if ( $bytesleft <= 0 ) {
3382                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3383                                 }
3384                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
3385                                 $working = $bytevalue & 0x1F;
3386                                 $bytesleft = 1;
3387                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
3388                                 $working = $bytevalue & 0x0F;
3389                                 $bytesleft = 2;
3390                         } else { // 1111 0xxx
3391                                 $working = $bytevalue & 0x07;
3392                                 $bytesleft = 3;
3393                         }
3394                 }
3395                 return $result;
3396         }
3397
3398         /**
3399          * Reverse the previously applied transliteration of non-ASCII characters
3400          * back to UTF-8. Used to protect data from corruption by broken web browsers
3401          * as listed in $wgBrowserBlackList.
3402          *
3403          * @param $invalue String
3404          * @return String
3405          * @private
3406          */
3407         function unmakesafe( $invalue ) {
3408                 $result = "";
3409                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3410                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
3411                                 $i += 3;
3412                                 $hexstring = "";
3413                                 do {
3414                                         $hexstring .= $invalue[$i];
3415                                         $i++;
3416                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
3417
3418                                 // Do some sanity checks. These aren't needed for reversability,
3419                                 // but should help keep the breakage down if the editor
3420                                 // breaks one of the entities whilst editing.
3421                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) and ( strlen( $hexstring ) <= 6 ) ) {
3422                                         $codepoint = hexdec( $hexstring );
3423                                         $result .= codepointToUtf8( $codepoint );
3424                                 } else {
3425                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
3426                                 }
3427                         } else {
3428                                 $result .= substr( $invalue, $i, 1 );
3429                         }
3430                 }
3431                 // reverse the transform that we made for reversability reasons.
3432                 return strtr( $result, array( "&#x0" => "&#x" ) );
3433         }
3434 }