includes/EditPage.php

   1 <?php
   2 /**
   3  * Page edition user interface.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * The edit page/HTML interface (split from Article)
  25  * The actual database and text munging is still in Article,
  26  * but it should get easier to call those from alternate
  27  * interfaces.
  28  *
  29  * EditPage cares about two distinct titles:
  30  * $this->mContextTitle is the page that forms submit to, links point to,
  31  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  32  * page in the database that is actually being edited. These are
  33  * usually the same, but they are now allowed to be different.
  34  *
  35  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  36  * headaches, which may be fatal.
  37  */
  38 class EditPage {
  39
  40         /**
  41          * Status: Article successfully updated
  42          */
  43         const AS_SUCCESS_UPDATE            = 200;
  44
  45         /**
  46          * Status: Article successfully created
  47          */
  48         const AS_SUCCESS_NEW_ARTICLE       = 201;
  49
  50         /**
  51          * Status: Article update aborted by a hook function
  52          */
  53         const AS_HOOK_ERROR                = 210;
  54
  55         /**
  56          * Status: A hook function returned an error
  57          */
  58         const AS_HOOK_ERROR_EXPECTED       = 212;
  59
  60         /**
  61          * Status: User is blocked from editting this page
  62          */
  63         const AS_BLOCKED_PAGE_FOR_USER     = 215;
  64
  65         /**
  66          * Status: Content too big (> $wgMaxArticleSize)
  67          */
  68         const AS_CONTENT_TOO_BIG           = 216;
  69
  70         /**
  71          * Status: User cannot edit? (not used)
  72          */
  73         const AS_USER_CANNOT_EDIT          = 217;
  74
  75         /**
  76          * Status: this anonymous user is not allowed to edit this page
  77          */
  78         const AS_READ_ONLY_PAGE_ANON       = 218;
  79
  80         /**
  81          * Status: this logged in user is not allowed to edit this page
  82          */
  83         const AS_READ_ONLY_PAGE_LOGGED     = 219;
  84
  85         /**
  86          * Status: wiki is in readonly mode (wfReadOnly() == true)
  87          */
  88         const AS_READ_ONLY_PAGE            = 220;
  89
  90         /**
  91          * Status: rate limiter for action 'edit' was tripped
  92          */
  93         const AS_RATE_LIMITED              = 221;
  94
  95         /**
  96          * Status: article was deleted while editting and param wpRecreate == false or form
  97          * was not posted
  98          */
  99         const AS_ARTICLE_WAS_DELETED       = 222;
 100
 101         /**
 102          * Status: user tried to create this page, but is not allowed to do that
 103          * ( Title->usercan('create') == false )
 104          */
 105         const AS_NO_CREATE_PERMISSION      = 223;
 106
 107         /**
 108          * Status: user tried to create a blank page
 109          */
 110         const AS_BLANK_ARTICLE             = 224;
 111
 112         /**
 113          * Status: (non-resolvable) edit conflict
 114          */
 115         const AS_CONFLICT_DETECTED         = 225;
 116
 117         /**
 118          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 119          * editting in his own userspace or talkspace and wpIgnoreBlankSummary == false
 120          */
 121         const AS_SUMMARY_NEEDED            = 226;
 122
 123         /**
 124          * Status: user tried to create a new section without content
 125          */
 126         const AS_TEXTBOX_EMPTY             = 228;
 127
 128         /**
 129          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 130          */
 131         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 132
 133         /**
 134          * not used
 135          */
 136         const AS_OK                        = 230;
 137
 138         /**
 139          * Status: WikiPage::doEdit() was unsuccessfull
 140          */
 141         const AS_END                       = 231;
 142
 143         /**
 144          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 145          */
 146         const AS_SPAM_ERROR                = 232;
 147
 148         /**
 149          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 150          */
 151         const AS_IMAGE_REDIRECT_ANON       = 233;
 152
 153         /**
 154          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 155          */
 156         const AS_IMAGE_REDIRECT_LOGGED     = 234;
 157
 158         /**
 159          * Status: can't parse content
 160          */
 161         const AS_PARSE_ERROR                = 240;
 162
 163         /**
 164          * HTML id and name for the beginning of the edit form.
 165          */
 166         const EDITFORM_ID                  = 'editform';
 167
 168         /**
 169          * @var Article
 170          */
 171         var $mArticle;
 172
 173         /**
 174          * @var Title
 175          */
 176         var $mTitle;
 177         private $mContextTitle = null;
 178         var $action = 'submit';
 179         var $isConflict = false;
 180         var $isCssJsSubpage = false;
 181         var $isCssSubpage = false;
 182         var $isJsSubpage = false;
 183         var $isWrongCaseCssJsPage = false;
 184         var $isNew = false; // new page or new section
 185         var $deletedSinceEdit;
 186         var $formtype;
 187         var $firsttime;
 188         var $lastDelete;
 189         var $mTokenOk = false;
 190         var $mTokenOkExceptSuffix = false;
 191         var $mTriedSave = false;
 192         var $incompleteForm = false;
 193         var $tooBig = false;
 194         var $kblength = false;
 195         var $missingComment = false;
 196         var $missingSummary = false;
 197         var $allowBlankSummary = false;
 198         var $autoSumm = '';
 199         var $hookError = '';
 200         #var $mPreviewTemplates;
 201
 202         /**
 203          * @var ParserOutput
 204          */
 205         var $mParserOutput;
 206
 207         /**
 208          * Has a summary been preset using GET parameter &summary= ?
 209          * @var Bool
 210          */
 211         var $hasPresetSummary = false;
 212
 213         var $mBaseRevision = false;
 214         var $mShowSummaryField = true;
 215
 216         # Form values
 217         var $save = false, $preview = false, $diff = false;
 218         var $minoredit = false, $watchthis = false, $recreate = false;
 219         var $textbox1 = '', $textbox2 = '', $summary = '', $nosummary = false;
 220         var $edittime = '', $section = '', $sectiontitle = '', $starttime = '';
 221         var $oldid = 0, $editintro = '', $scrolltop = null, $bot = true;
 222         var $contentModel = null, $contentFormat = null;
 223
 224         # Placeholders for text injection by hooks (must be HTML)
 225         # extensions should take care to _append_ to the present value
 226         public $editFormPageTop = ''; // Before even the preview
 227         public $editFormTextTop = '';
 228         public $editFormTextBeforeContent = '';
 229         public $editFormTextAfterWarn = '';
 230         public $editFormTextAfterTools = '';
 231         public $editFormTextBottom = '';
 232         public $editFormTextAfterContent = '';
 233         public $previewTextAfterContent = '';
 234         public $mPreloadContent = null;
 235
 236         /* $didSave should be set to true whenever an article was succesfully altered. */
 237         public $didSave = false;
 238         public $undidRev = 0;
 239
 240         public $suppressIntro = false;
 241
 242         /**
 243          * Set to true to allow editing of non-text content types.
 244          *
 245          * @var bool
 246          */
 247         public $allowNonTextContent = false;
 248
 249         /**
 250          * @param $article Article
 251          */
 252         public function __construct( Article $article ) {
 253                 $this->mArticle = $article;
 254                 $this->mTitle = $article->getTitle();
 255
 256                 $this->contentModel = $this->mTitle->getContentModel();
 257
 258                 $handler = ContentHandler::getForModelID( $this->contentModel );
 259                 $this->contentFormat = $handler->getDefaultFormat();
 260         }
 261
 262         /**
 263          * @return Article
 264          */
 265         public function getArticle() {
 266                 return $this->mArticle;
 267         }
 268
 269         /**
 270          * @since 1.19
 271          * @return Title
 272          */
 273         public function getTitle() {
 274                 return $this->mTitle;
 275         }
 276
 277         /**
 278          * Set the context Title object
 279          *
 280          * @param $title Title object or null
 281          */
 282         public function setContextTitle( $title ) {
 283                 $this->mContextTitle = $title;
 284         }
 285
 286         /**
 287          * Get the context title object.
 288          * If not set, $wgTitle will be returned. This behavior might change in
 289          * the future to return $this->mTitle instead.
 290          *
 291          * @return Title object
 292          */
 293         public function getContextTitle() {
 294                 if ( is_null( $this->mContextTitle ) ) {
 295                         global $wgTitle;
 296                         return $wgTitle;
 297                 } else {
 298                         return $this->mContextTitle;
 299                 }
 300         }
 301
 302         function submit() {
 303                 $this->edit();
 304         }
 305
 306         /**
 307          * This is the function that gets called for "action=edit". It
 308          * sets up various member variables, then passes execution to
 309          * another function, usually showEditForm()
 310          *
 311          * The edit form is self-submitting, so that when things like
 312          * preview and edit conflicts occur, we get the same form back
 313          * with the extra stuff added.  Only when the final submission
 314          * is made and all is well do we actually save and redirect to
 315          * the newly-edited page.
 316          */
 317         function edit() {
 318                 global $wgOut, $wgRequest, $wgUser;
 319                 // Allow extensions to modify/prevent this form or submission
 320                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 321                         return;
 322                 }
 323
 324                 wfProfileIn( __METHOD__ );
 325                 wfDebug( __METHOD__ . ": enter\n" );
 326
 327                 // If they used redlink=1 and the page exists, redirect to the main article
 328                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 329                         $wgOut->redirect( $this->mTitle->getFullURL() );
 330                         wfProfileOut( __METHOD__ );
 331                         return;
 332                 }
 333
 334                 $this->importFormData( $wgRequest );
 335                 $this->firsttime = false;
 336
 337                 if ( $this->live ) {
 338                         $this->livePreview();
 339                         wfProfileOut( __METHOD__ );
 340                         return;
 341                 }
 342
 343                 if ( wfReadOnly() && $this->save ) {
 344                         // Force preview
 345                         $this->save = false;
 346                         $this->preview = true;
 347                 }
 348
 349                 if ( $this->save ) {
 350                         $this->formtype = 'save';
 351                 } elseif ( $this->preview ) {
 352                         $this->formtype = 'preview';
 353                 } elseif ( $this->diff ) {
 354                         $this->formtype = 'diff';
 355                 } else { # First time through
 356                         $this->firsttime = true;
 357                         if ( $this->previewOnOpen() ) {
 358                                 $this->formtype = 'preview';
 359                         } else {
 360                                 $this->formtype = 'initial';
 361                         }
 362                 }
 363
 364                 $permErrors = $this->getEditPermissionErrors();
 365                 if ( $permErrors ) {
 366                         wfDebug( __METHOD__ . ": User can't edit\n" );
 367                         // Auto-block user's IP if the account was "hard" blocked
 368                         $wgUser->spreadAnyEditBlock();
 369
 370                         $this->displayPermissionsError( $permErrors );
 371
 372                         wfProfileOut( __METHOD__ );
 373                         return;
 374                 }
 375
 376                 wfProfileIn( __METHOD__ . "-business-end" );
 377
 378                 $this->isConflict = false;
 379                 // css / js subpages of user pages get a special treatment
 380                 $this->isCssJsSubpage       = $this->mTitle->isCssJsSubpage();
 381                 $this->isCssSubpage         = $this->mTitle->isCssSubpage();
 382                 $this->isJsSubpage          = $this->mTitle->isJsSubpage();
 383                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 384                 $this->isNew                = !$this->mTitle->exists() || $this->section == 'new';
 385
 386                 # Show applicable editing introductions
 387                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 388                         $this->showIntro();
 389                 }
 390
 391                 # Attempt submission here.  This will check for edit conflicts,
 392                 # and redundantly check for locked database, blocked IPs, etc.
 393                 # that edit() already checked just in case someone tries to sneak
 394                 # in the back door with a hand-edited submission URL.
 395
 396                 if ( 'save' == $this->formtype ) {
 397                         if ( !$this->attemptSave() ) {
 398                                 wfProfileOut( __METHOD__ . "-business-end" );
 399                                 wfProfileOut( __METHOD__ );
 400                                 return;
 401                         }
 402                 }
 403
 404                 # First time through: get contents, set time for conflict
 405                 # checking, etc.
 406                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 407                         if ( $this->initialiseForm() === false ) {
 408                                 $this->noSuchSectionPage();
 409                                 wfProfileOut( __METHOD__ . "-business-end" );
 410                                 wfProfileOut( __METHOD__ );
 411                                 return;
 412                         }
 413                         if ( !$this->mTitle->getArticleID() )
 414                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 415                         else
 416                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 417                 }
 418
 419                 $this->showEditForm();
 420                 wfProfileOut( __METHOD__ . "-business-end" );
 421                 wfProfileOut( __METHOD__ );
 422         }
 423
 424         /**
 425          * @return array
 426          */
 427         protected function getEditPermissionErrors() {
 428                 global $wgUser;
 429                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 430                 # Can this title be created?
 431                 if ( !$this->mTitle->exists() ) {
 432                         $permErrors = array_merge( $permErrors,
 433                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 434                 }
 435                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 436                 $remove = array();
 437                 foreach ( $permErrors as $error ) {
 438                         if ( ( $this->preview || $this->diff ) &&
 439                                 ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' ) )
 440                         {
 441                                 $remove[] = $error;
 442                         }
 443                 }
 444                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 445                 return $permErrors;
 446         }
 447
 448         /**
 449          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 450          * but with the following differences:
 451          * - If redlink=1, the user will be redirected to the page
 452          * - If there is content to display or the error occurs while either saving,
 453          *   previewing or showing the difference, it will be a
 454          *   "View source for ..." page displaying the source code after the error message.
 455          *
 456          * @since 1.19
 457          * @param $permErrors Array of permissions errors, as returned by
 458          *                    Title::getUserPermissionsErrors().
 459          */
 460         protected function displayPermissionsError( array $permErrors ) {
 461                 global $wgRequest, $wgOut;
 462
 463                 if ( $wgRequest->getBool( 'redlink' ) ) {
 464                         // The edit page was reached via a red link.
 465                         // Redirect to the article page and let them click the edit tab if
 466                         // they really want a permission error.
 467                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 468                         return;
 469                 }
 470
 471                 $content = $this->getContentObject();
 472
 473                 # Use the normal message if there's nothing to display
 474                 if ( $this->firsttime && $content->isEmpty() ) {
 475                         $action = $this->mTitle->exists() ? 'edit' :
 476                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 477                         throw new PermissionsError( $action, $permErrors );
 478                 }
 479
 480                 $wgOut->setPageTitle( wfMessage( 'viewsource-title', $this->getContextTitle()->getPrefixedText() ) );
 481                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 482                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 483                 $wgOut->addHTML( "<hr />\n" );
 484
 485                 # If the user made changes, preserve them when showing the markup
 486                 # (This happens when a user is blocked during edit, for instance)
 487                 if ( !$this->firsttime ) {
 488                         $text = $this->textbox1;
 489                         $wgOut->addWikiMsg( 'viewyourtext' );
 490                 } else {
 491                         $text = $this->toEditText( $content );
 492                         $wgOut->addWikiMsg( 'viewsourcetext' );
 493                 }
 494
 495                 $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 496
 497                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 498                         Linker::formatTemplates( $this->getTemplates() ) ) );
 499
 500                 if ( $this->mTitle->exists() ) {
 501                         $wgOut->returnToMain( null, $this->mTitle );
 502                 }
 503         }
 504
 505         /**
 506          * Show a read-only error
 507          * Parameters are the same as OutputPage:readOnlyPage()
 508          * Redirect to the article page if redlink=1
 509          * @deprecated in 1.19; use displayPermissionsError() instead
 510          */
 511         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 512                 wfDeprecated( __METHOD__, '1.19' );
 513
 514                 global $wgRequest, $wgOut;
 515                 if ( $wgRequest->getBool( 'redlink' ) ) {
 516                         // The edit page was reached via a red link.
 517                         // Redirect to the article page and let them click the edit tab if
 518                         // they really want a permission error.
 519                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 520                 } else {
 521                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 522                 }
 523         }
 524
 525         /**
 526          * Should we show a preview when the edit form is first shown?
 527          *
 528          * @return bool
 529          */
 530         protected function previewOnOpen() {
 531                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 532                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 533                         // Explicit override from request
 534                         return true;
 535                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 536                         // Explicit override from request
 537                         return false;
 538                 } elseif ( $this->section == 'new' ) {
 539                         // Nothing *to* preview for new sections
 540                         return false;
 541                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 542                         // Standard preference behaviour
 543                         return true;
 544                 } elseif ( !$this->mTitle->exists() &&
 545                   isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] ) &&
 546                   $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 547                 {
 548                         // Categories are special
 549                         return true;
 550                 } else {
 551                         return false;
 552                 }
 553         }
 554
 555         /**
 556          * Checks whether the user entered a skin name in uppercase,
 557          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 558          *
 559          * @return bool
 560          */
 561         protected function isWrongCaseCssJsPage() {
 562                 if ( $this->mTitle->isCssJsSubpage() ) {
 563                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 564                         $skins = array_merge(
 565                                 array_keys( Skin::getSkinNames() ),
 566                                 array( 'common' )
 567                         );
 568                         return !in_array( $name, $skins )
 569                                 && in_array( strtolower( $name ), $skins );
 570                 } else {
 571                         return false;
 572                 }
 573         }
 574
 575         /**
 576          * Does this EditPage class support section editing?
 577          * This is used by EditPage subclasses to indicate their ui cannot handle section edits
 578          *
 579          * @return bool
 580          */
 581         protected function isSectionEditSupported() {
 582                 return true;
 583         }
 584
 585         /**
 586          * This function collects the form data and uses it to populate various member variables.
 587          * @param $request WebRequest
 588          */
 589         function importFormData( &$request ) {
 590                 global $wgLang, $wgUser;
 591
 592                 wfProfileIn( __METHOD__ );
 593
 594                 # Section edit can come from either the form or a link
 595                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 596
 597                 if ( $request->wasPosted() ) {
 598                         # These fields need to be checked for encoding.
 599                         # Also remove trailing whitespace, but don't remove _initial_
 600                         # whitespace from the text boxes. This may be significant formatting.
 601                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 602                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 603                                 // Skip this if wpTextbox2 has input, it indicates that we came
 604                                 // from a conflict page with raw page text, not a custom form
 605                                 // modified by subclasses
 606                                 wfProfileIn( get_class( $this ) . "::importContentFormData" );
 607                                 $textbox1 = $this->importContentFormData( $request );
 608                                 if ( isset( $textbox1 ) )
 609                                         $this->textbox1 = $textbox1;
 610                                 wfProfileOut( get_class( $this ) . "::importContentFormData" );
 611                         }
 612
 613                         # Truncate for whole multibyte characters
 614                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary' ), 255 );
 615
 616                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 617                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 618                         # section titles.
 619                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 620
 621                         # Treat sectiontitle the same way as summary.
 622                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 623                         # currently doing double duty as both edit summary and section title. Right now this
 624                         # is just to allow API edits to work around this limitation, but this should be
 625                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 626                         $this->sectiontitle = $wgLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 627                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 628
 629                         $this->edittime = $request->getVal( 'wpEdittime' );
 630                         $this->starttime = $request->getVal( 'wpStarttime' );
 631
 632                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 633
 634                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 635                                 // wpTextbox1 field is missing, possibly due to being "too big"
 636                                 // according to some filter rules such as Suhosin's setting for
 637                                 // suhosin.request.max_value_length (d'oh)
 638                                 $this->incompleteForm = true;
 639                         } else {
 640                                 // edittime should be one of our last fields; if it's missing,
 641                                 // the submission probably broke somewhere in the middle.
 642                                 $this->incompleteForm = is_null( $this->edittime );
 643                         }
 644                         if ( $this->incompleteForm ) {
 645                                 # If the form is incomplete, force to preview.
 646                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 647                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 648                                 $this->preview = true;
 649                         } else {
 650                                 /* Fallback for live preview */
 651                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 652                                 $this->diff = $request->getCheck( 'wpDiff' );
 653
 654                                 // Remember whether a save was requested, so we can indicate
 655                                 // if we forced preview due to session failure.
 656                                 $this->mTriedSave = !$this->preview;
 657
 658                                 if ( $this->tokenOk( $request ) ) {
 659                                         # Some browsers will not report any submit button
 660                                         # if the user hits enter in the comment box.
 661                                         # The unmarked state will be assumed to be a save,
 662                                         # if the form seems otherwise complete.
 663                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 664                                 } elseif ( $this->diff ) {
 665                                         # Failed token check, but only requested "Show Changes".
 666                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 667                                 } else {
 668                                         # Page might be a hack attempt posted from
 669                                         # an external site. Preview instead of saving.
 670                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 671                                         $this->preview = true;
 672                                 }
 673                         }
 674                         $this->save = !$this->preview && !$this->diff;
 675                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 676                                 $this->edittime = null;
 677                         }
 678
 679                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 680                                 $this->starttime = null;
 681                         }
 682
 683                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 684
 685                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 686                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 687
 688                         # Don't force edit summaries when a user is editing their own user or talk page
 689                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 690                                 $this->mTitle->getText() == $wgUser->getName() )
 691                         {
 692                                 $this->allowBlankSummary = true;
 693                         } else {
 694                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary' );
 695                         }
 696
 697                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 698                 } else {
 699                         # Not a posted form? Start with nothing.
 700                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 701                         $this->textbox1     = '';
 702                         $this->summary      = '';
 703                         $this->sectiontitle = '';
 704                         $this->edittime     = '';
 705                         $this->starttime    = wfTimestampNow();
 706                         $this->edit         = false;
 707                         $this->preview      = false;
 708                         $this->save         = false;
 709                         $this->diff         = false;
 710                         $this->minoredit    = false;
 711                         $this->watchthis    = $request->getBool( 'watchthis', false ); // Watch may be overriden by request parameters
 712                         $this->recreate     = false;
 713
 714                         // When creating a new section, we can preload a section title by passing it as the
 715                         // preloadtitle parameter in the URL (Bug 13100)
 716                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 717                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 718                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 719                                 $this->summary = $request->getVal( 'preloadtitle' );
 720                         }
 721                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 722                                 $this->summary = $request->getText( 'summary' );
 723                                 if ( $this->summary !== '' ) {
 724                                         $this->hasPresetSummary = true;
 725                                 }
 726                         }
 727
 728                         if ( $request->getVal( 'minor' ) ) {
 729                                 $this->minoredit = true;
 730                         }
 731                 }
 732
 733                 $this->oldid = $request->getInt( 'oldid' );
 734
 735                 $this->bot = $request->getBool( 'bot', true );
 736                 $this->nosummary = $request->getBool( 'nosummary' );
 737
 738                 $content_handler = ContentHandler::getForTitle( $this->mTitle );
 739                 $this->contentModel = $request->getText( 'model', $content_handler->getModelID() ); #may be overridden by revision
 740                 $this->contentFormat = $request->getText( 'format', $content_handler->getDefaultFormat() ); #may be overridden by revision
 741
 742                 #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
 743                 #TODO: check if the desired content model supports the given content format!
 744
 745                 $this->live = $request->getCheck( 'live' );
 746                 $this->editintro = $request->getText( 'editintro',
 747                         // Custom edit intro for new sections
 748                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 749
 750                 // Allow extensions to modify form data
 751                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 752
 753                 wfProfileOut( __METHOD__ );
 754         }
 755
 756         /**
 757          * Subpage overridable method for extracting the page content data from the
 758          * posted form to be placed in $this->textbox1, if using customized input
 759          * this method should be overrided and return the page text that will be used
 760          * for saving, preview parsing and so on...
 761          *
 762          * @param $request WebRequest
 763          */
 764         protected function importContentFormData( &$request ) {
 765                 return; // Don't do anything, EditPage already extracted wpTextbox1
 766         }
 767
 768         /**
 769          * Initialise form fields in the object
 770          * Called on the first invocation, e.g. when a user clicks an edit link
 771          * @return bool -- if the requested section is valid
 772          */
 773         function initialiseForm() {
 774                 global $wgUser;
 775                 $this->edittime = $this->mArticle->getTimestamp();
 776
 777                 $content = $this->getContentObject( false ); #TODO: track content object?!
 778                 $this->textbox1 = $this->toEditText( $content );
 779
 780                 // activate checkboxes if user wants them to be always active
 781                 # Sort out the "watch" checkbox
 782                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 783                         # Watch all edits
 784                         $this->watchthis = true;
 785                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 786                         # Watch creations
 787                         $this->watchthis = true;
 788                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
 789                         # Already watched
 790                         $this->watchthis = true;
 791                 }
 792                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 793                         $this->minoredit = true;
 794                 }
 795                 if ( $this->textbox1 === false ) {
 796                         return false;
 797                 }
 798                 wfProxyCheck();
 799                 return true;
 800         }
 801
 802         /**
 803          * Fetch initial editing page content.
 804          *
 805          * @param $def_text string
 806          * @return mixed string on success, $def_text for invalid sections
 807          * @private
 808          * @deprecated since 1.21
 809          */
 810         function getContent( $def_text = false ) {
 811                 wfDeprecated( __METHOD__, '1.21' );
 812
 813                 if ( $def_text !== null && $def_text !== false && $def_text !== '' ) {
 814                         $def_content = $this->toEditContent( $def_text );
 815                 } else {
 816                         $def_content = false;
 817                 }
 818
 819                 $content = $this->getContentObject( $def_content );
 820
 821                 // Note: EditPage should only be used with text based content anyway.
 822                 return $this->toEditText( $content );
 823         }
 824
 825         /**
 826          * @param Content|false $def_content The default value to return
 827          *
 828          * @return mixed Content on success, $def_content for invalid sections
 829          *
 830          * @since 1.21
 831          */
 832         protected function getContentObject( $def_content = null ) {
 833                 global $wgOut, $wgRequest;
 834
 835                 wfProfileIn( __METHOD__ );
 836
 837                 $content = false;
 838
 839                 // For message page not locally set, use the i18n message.
 840                 // For other non-existent articles, use preload text if any.
 841                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
 842                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
 843                                 # If this is a system message, get the default text.
 844                                 $msg = $this->mTitle->getDefaultMessageText();
 845
 846                                 $content = $this->toEditContent( $msg );
 847                         }
 848                         if ( $content === false ) {
 849                                 # If requested, preload some text.
 850                                 $preload = $wgRequest->getVal( 'preload',
 851                                         // Custom preload text for new sections
 852                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 853
 854                                 $content = $this->getPreloadedContent( $preload );
 855                         }
 856                 // For existing pages, get text based on "undo" or section parameters.
 857                 } else {
 858                         if ( $this->section != '' ) {
 859                                 // Get section edit text (returns $def_text for invalid sections)
 860                                 $orig = $this->getOriginalContent();
 861                                 $content = $orig ? $orig->getSection( $this->section ) : null;
 862
 863                                 if ( !$content ) $content = $def_content;
 864                         } else {
 865                                 $undoafter = $wgRequest->getInt( 'undoafter' );
 866                                 $undo = $wgRequest->getInt( 'undo' );
 867
 868                                 if ( $undo > 0 && $undoafter > 0 ) {
 869                                         if ( $undo < $undoafter ) {
 870                                                 # If they got undoafter and undo round the wrong way, switch them
 871                                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 872                                         }
 873
 874                                         $undorev = Revision::newFromId( $undo );
 875                                         $oldrev = Revision::newFromId( $undoafter );
 876
 877                                         # Sanity check, make sure it's the right page,
 878                                         # the revisions exist and they were not deleted.
 879                                         # Otherwise, $content will be left as-is.
 880                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 881                                                 $undorev->getPage() == $oldrev->getPage() &&
 882                                                 $undorev->getPage() == $this->mTitle->getArticleID() &&
 883                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 884                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 885
 886                                                 $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
 887
 888                                                 if ( $content === false ) {
 889                                                         # Warn the user that something went wrong
 890                                                         $undoMsg = 'failure';
 891                                                 } else {
 892                                                         # Inform the user of our success and set an automatic edit summary
 893                                                         $undoMsg = 'success';
 894
 895                                                         # If we just undid one rev, use an autosummary
 896                                                         $firstrev = $oldrev->getNext();
 897                                                         if ( $firstrev && $firstrev->getId() == $undo ) {
 898                                                                 $undoSummary = wfMessage( 'undo-summary', $undo, $undorev->getUserText() )->inContentLanguage()->text();
 899                                                                 if ( $this->summary === '' ) {
 900                                                                         $this->summary = $undoSummary;
 901                                                                 } else {
 902                                                                         $this->summary = $undoSummary . wfMessage( 'colon-separator' )
 903                                                                                 ->inContentLanguage()->text() . $this->summary;
 904                                                                 }
 905                                                                 $this->undidRev = $undo;
 906                                                         }
 907                                                         $this->formtype = 'diff';
 908                                                 }
 909                                         } else {
 910                                                 // Failed basic sanity checks.
 911                                                 // Older revisions may have been removed since the link
 912                                                 // was created, or we may simply have got bogus input.
 913                                                 $undoMsg = 'norev';
 914                                         }
 915
 916                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
 917                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
 918                                                 wfMessage( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
 919                                 }
 920
 921                                 if ( $content === false ) {
 922                                         $content = $this->getOriginalContent();
 923                                 }
 924                         }
 925                 }
 926
 927                 wfProfileOut( __METHOD__ );
 928                 return $content;
 929         }
 930
 931         /**
 932          * Get the content of the wanted revision, without section extraction.
 933          *
 934          * The result of this function can be used to compare user's input with
 935          * section replaced in its context (using WikiPage::replaceSection())
 936          * to the original text of the edit.
 937          *
 938          * This difers from Article::getContent() that when a missing revision is
 939          * encountered the result will be an empty string and not the
 940          * 'missing-revision' message.
 941          *
 942          * @since 1.19
 943          * @return string
 944          */
 945         private function getOriginalContent() {
 946                 if ( $this->section == 'new' ) {
 947                         return $this->getCurrentContent();
 948                 }
 949                 $revision = $this->mArticle->getRevisionFetched();
 950                 if ( $revision === null ) {
 951                         if ( !$this->contentModel ) $this->contentModel = $this->getTitle()->getContentModel();
 952                         $handler = ContentHandler::getForModelID( $this->contentModel );
 953
 954                         return $handler->makeEmptyContent();
 955                 }
 956                 $content = $revision->getContent();
 957                 return $content;
 958         }
 959
 960         /**
 961          * Get the current content of the page. This is basically similar to
 962          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
 963          * content object is returned instead of null.
 964          *
 965          * @since 1.21
 966          * @return Content
 967          */
 968         protected function getCurrentContent() {
 969                 $rev = $this->mArticle->getRevision();
 970                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
 971
 972                 if ( $content  === false || $content === null ) {
 973                         if ( !$this->contentModel ) $this->contentModel = $this->getTitle()->getContentModel();
 974                         $handler = ContentHandler::getForModelID( $this->contentModel );
 975
 976                         return $handler->makeEmptyContent();
 977                 } else {
 978                         # nasty side-effect, but needed for consistency
 979                         $this->contentModel = $rev->getContentModel();
 980                         $this->contentFormat = $rev->getContentFormat();
 981
 982                         return $content;
 983                 }
 984         }
 985
 986
 987         /**
 988          * Use this method before edit() to preload some text into the edit box
 989          *
 990          * @param $text string
 991          * @deprecated since 1.21
 992          */
 993         public function setPreloadedText( $text ) {
 994                 wfDeprecated( __METHOD__, "1.21" );
 995
 996                 $content = $this->toEditContent( $text );
 997
 998                 $this->setPreloadedContent( $content );
 999         }
1000
1001         /**
1002          * Use this method before edit() to preload some content into the edit box
1003          *
1004          * @param $content Content
1005          *
1006          * @since 1.21
1007          */
1008         public function setPreloadedContent( Content $content ) {
1009                 $this->mPreloadedContent = $content;
1010         }
1011
1012         /**
1013          * Get the contents to be preloaded into the box, either set by
1014          * an earlier setPreloadText() or by loading the given page.
1015          *
1016          * @param $preload String: representing the title to preload from.
1017          *
1018          * @return String
1019          *
1020          * @deprecated since 1.21, use getPreloadedContent() instead
1021          */
1022         protected function getPreloadedText( $preload ) {
1023                 wfDeprecated( __METHOD__, "1.21" );
1024
1025                 $content = $this->getPreloadedContent( $preload );
1026                 $text = $this->toEditText( $content );
1027
1028                 return $text;
1029         }
1030
1031         /**
1032          * Get the contents to be preloaded into the box, either set by
1033          * an earlier setPreloadText() or by loading the given page.
1034          *
1035          * @param $preload String: representing the title to preload from.
1036          *
1037          * @return Content
1038          *
1039          * @since 1.21
1040          */
1041         protected function getPreloadedContent( $preload ) {
1042                 global $wgUser;
1043
1044                 if ( !empty( $this->mPreloadContent ) ) {
1045                         return $this->mPreloadContent;
1046                 }
1047
1048                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1049
1050                 if ( $preload === '' ) {
1051                         return $handler->makeEmptyContent();
1052                 }
1053
1054                 $title = Title::newFromText( $preload );
1055                 # Check for existence to avoid getting MediaWiki:Noarticletext
1056                 if ( $title === null || !$title->exists() || !$title->userCan( 'read' ) ) {
1057                         return $handler->makeEmptyContent();
1058                 }
1059
1060                 $page = WikiPage::factory( $title );
1061                 if ( $page->isRedirect() ) {
1062                         $title = $page->getRedirectTarget();
1063                         # Same as before
1064                         if ( $title === null || !$title->exists() || !$title->userCan( 'read' ) ) {
1065                                 return $handler->makeEmptyContent();
1066                         }
1067                         $page = WikiPage::factory( $title );
1068                 }
1069
1070                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1071                 $content = $page->getContent( Revision::RAW );
1072
1073                 return $content->preloadTransform( $title, $parserOptions );
1074         }
1075
1076         /**
1077          * Make sure the form isn't faking a user's credentials.
1078          *
1079          * @param $request WebRequest
1080          * @return bool
1081          * @private
1082          */
1083         function tokenOk( &$request ) {
1084                 global $wgUser;
1085                 $token = $request->getVal( 'wpEditToken' );
1086                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1087                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1088                 return $this->mTokenOk;
1089         }
1090
1091         /**
1092          * Attempt submission
1093          * @return bool false if output is done, true if the rest of the form should be displayed
1094          */
1095         function attemptSave() {
1096                 global $wgUser, $wgOut;
1097
1098                 $resultDetails = false;
1099                 # Allow bots to exempt some edits from bot flagging
1100                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1101                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1102                 // FIXME: once the interface for internalAttemptSave() is made nicer, this should use the message in $status
1103                 if ( $status->value == self::AS_SUCCESS_UPDATE || $status->value == self::AS_SUCCESS_NEW_ARTICLE ) {
1104                         $this->didSave = true;
1105                 }
1106
1107                 switch ( $status->value ) {
1108                         case self::AS_HOOK_ERROR_EXPECTED:
1109                         case self::AS_CONTENT_TOO_BIG:
1110                         case self::AS_ARTICLE_WAS_DELETED:
1111                         case self::AS_CONFLICT_DETECTED:
1112                         case self::AS_SUMMARY_NEEDED:
1113                         case self::AS_TEXTBOX_EMPTY:
1114                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1115                         case self::AS_END:
1116                                 return true;
1117
1118                         case self::AS_HOOK_ERROR:
1119                                 return false;
1120
1121                         case self::AS_PARSE_ERROR:
1122                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>');
1123                                 return true;
1124
1125                         case self::AS_SUCCESS_NEW_ARTICLE:
1126                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1127                                 $anchor = isset ( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1128                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1129                                 return false;
1130
1131                         case self::AS_SUCCESS_UPDATE:
1132                                 $extraQuery = '';
1133                                 $sectionanchor = $resultDetails['sectionanchor'];
1134
1135                                 // Give extensions a chance to modify URL query on update
1136                                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this->mArticle, &$sectionanchor, &$extraQuery ) );
1137
1138                                 if ( $resultDetails['redirect'] ) {
1139                                         if ( $extraQuery == '' ) {
1140                                                 $extraQuery = 'redirect=no';
1141                                         } else {
1142                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1143                                         }
1144                                 }
1145                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1146                                 return false;
1147
1148                         case self::AS_BLANK_ARTICLE:
1149                                 $wgOut->redirect( $this->getContextTitle()->getFullURL() );
1150                                 return false;
1151
1152                         case self::AS_SPAM_ERROR:
1153                                 $this->spamPageWithContent( $resultDetails['spam'] );
1154                                 return false;
1155
1156                         case self::AS_BLOCKED_PAGE_FOR_USER:
1157                                 throw new UserBlockedError( $wgUser->getBlock() );
1158
1159                         case self::AS_IMAGE_REDIRECT_ANON:
1160                         case self::AS_IMAGE_REDIRECT_LOGGED:
1161                                 throw new PermissionsError( 'upload' );
1162
1163                         case self::AS_READ_ONLY_PAGE_ANON:
1164                         case self::AS_READ_ONLY_PAGE_LOGGED:
1165                                 throw new PermissionsError( 'edit' );
1166
1167                         case self::AS_READ_ONLY_PAGE:
1168                                 throw new ReadOnlyError;
1169
1170                         case self::AS_RATE_LIMITED:
1171                                 throw new ThrottledError();
1172
1173                         case self::AS_NO_CREATE_PERMISSION:
1174                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1175                                 throw new PermissionsError( $permission );
1176
1177                         default:
1178                                 // We don't recognize $status->value. The only way that can happen
1179                                 // is if an extension hook aborted from inside ArticleSave.
1180                                 // Render the status object into $this->hookError
1181                                 // FIXME this sucks, we should just use the Status object throughout
1182                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1183                                         '</div>';
1184                                 return true;
1185                 }
1186         }
1187
1188         /**
1189          * Attempt submission (no UI)
1190          *
1191          * @param $result
1192          * @param $bot bool
1193          *
1194          * @return Status object, possibly with a message, but always with one of the AS_* constants in $status->value,
1195          *
1196          * FIXME: This interface is TERRIBLE, but hard to get rid of due to various error display idiosyncrasies. There are
1197          * also lots of cases where error metadata is set in the object and retrieved later instead of being returned, e.g.
1198          * AS_CONTENT_TOO_BIG and AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some time.
1199          */
1200         function internalAttemptSave( &$result, $bot = false ) {
1201                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1202
1203                 $status = Status::newGood();
1204
1205                 wfProfileIn( __METHOD__  );
1206                 wfProfileIn( __METHOD__ . '-checks' );
1207
1208                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
1209                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1210                         $status->fatal( 'hookaborted' );
1211                         $status->value = self::AS_HOOK_ERROR;
1212                         wfProfileOut( __METHOD__ . '-checks' );
1213                         wfProfileOut( __METHOD__  );
1214                         return $status;
1215                 }
1216
1217                 try {
1218                         # Construct Content object
1219                         $textbox_content = $this->toEditContent( $this->textbox1 );
1220                 } catch (MWContentSerializationException $ex) {
1221                         $status->fatal( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
1222                         $status->value = self::AS_PARSE_ERROR;
1223                         wfProfileOut( __METHOD__ );
1224                         return $status;
1225                 }
1226
1227                 # Check image redirect
1228                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1229                         $textbox_content->isRedirect() &&
1230                         !$wgUser->isAllowed( 'upload' ) ) {
1231                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1232                                 $status->setResult( false, $code );
1233
1234                                 wfProfileOut( __METHOD__ . '-checks' );
1235                                 wfProfileOut( __METHOD__  );
1236
1237                                 return $status;
1238                 }
1239
1240                 # Check for spam
1241                 $match = self::matchSummarySpamRegex( $this->summary );
1242                 if ( $match === false ) {
1243                         $match = self::matchSpamRegex( $this->textbox1 );
1244                 }
1245                 if ( $match !== false ) {
1246                         $result['spam'] = $match;
1247                         $ip = $wgRequest->getIP();
1248                         $pdbk = $this->mTitle->getPrefixedDBkey();
1249                         $match = str_replace( "\n", '', $match );
1250                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1251                         $status->fatal( 'spamprotectionmatch', $match );
1252                         $status->value = self::AS_SPAM_ERROR;
1253                         wfProfileOut( __METHOD__ . '-checks' );
1254                         wfProfileOut( __METHOD__ );
1255                         return $status;
1256                 }
1257                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
1258                         # Error messages etc. could be handled within the hook...
1259                         $status->fatal( 'hookaborted' );
1260                         $status->value = self::AS_HOOK_ERROR;
1261                         wfProfileOut( __METHOD__ . '-checks' );
1262                         wfProfileOut( __METHOD__ );
1263                         return $status;
1264                 } elseif ( $this->hookError != '' ) {
1265                         # ...or the hook could be expecting us to produce an error
1266                         $status->fatal( 'hookaborted' );
1267                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1268                         wfProfileOut( __METHOD__ . '-checks' );
1269                         wfProfileOut( __METHOD__ );
1270                         return $status;
1271                 }
1272
1273                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1274                         // Auto-block user's IP if the account was "hard" blocked
1275                         $wgUser->spreadAnyEditBlock();
1276                         # Check block state against master, thus 'false'.
1277                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1278                         wfProfileOut( __METHOD__ . '-checks' );
1279                         wfProfileOut( __METHOD__ );
1280                         return $status;
1281                 }
1282
1283                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1284                 if ( $this->kblength > $wgMaxArticleSize ) {
1285                         // Error will be displayed by showEditForm()
1286                         $this->tooBig = true;
1287                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1288                         wfProfileOut( __METHOD__ . '-checks' );
1289                         wfProfileOut( __METHOD__ );
1290                         return $status;
1291                 }
1292
1293                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1294                         if ( $wgUser->isAnon() ) {
1295                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1296                                 wfProfileOut( __METHOD__ . '-checks' );
1297                                 wfProfileOut( __METHOD__ );
1298                                 return $status;
1299                         } else {
1300                                 $status->fatal( 'readonlytext' );
1301                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1302                                 wfProfileOut( __METHOD__ . '-checks' );
1303                                 wfProfileOut( __METHOD__ );
1304                                 return $status;
1305                         }
1306                 }
1307
1308                 if ( wfReadOnly() ) {
1309                         $status->fatal( 'readonlytext' );
1310                         $status->value = self::AS_READ_ONLY_PAGE;
1311                         wfProfileOut( __METHOD__ . '-checks' );
1312                         wfProfileOut( __METHOD__ );
1313                         return $status;
1314                 }
1315                 if ( $wgUser->pingLimiter() ) {
1316                         $status->fatal( 'actionthrottledtext' );
1317                         $status->value = self::AS_RATE_LIMITED;
1318                         wfProfileOut( __METHOD__ . '-checks' );
1319                         wfProfileOut( __METHOD__ );
1320                         return $status;
1321                 }
1322
1323                 # If the article has been deleted while editing, don't save it without
1324                 # confirmation
1325                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1326                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1327                         wfProfileOut( __METHOD__ . '-checks' );
1328                         wfProfileOut( __METHOD__ );
1329                         return $status;
1330                 }
1331
1332                 wfProfileOut( __METHOD__ . '-checks' );
1333
1334                 # Load the page data from the master. If anything changes in the meantime,
1335                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1336                 $this->mArticle->loadPageData( 'fromdbmaster' );
1337                 $new = !$this->mArticle->exists();
1338
1339                 if ( $new ) {
1340                         // Late check for create permission, just in case *PARANOIA*
1341                         if ( !$this->mTitle->userCan( 'create' ) ) {
1342                                 $status->fatal( 'nocreatetext' );
1343                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1344                                 wfDebug( __METHOD__ . ": no create permission\n" );
1345                                 wfProfileOut( __METHOD__ );
1346                                 return $status;
1347                         }
1348
1349                         # Don't save a new article if it's blank.
1350                         if ( $this->textbox1 == '' ) {
1351                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1352                                 wfProfileOut( __METHOD__ );
1353                                 return $status;
1354                         }
1355
1356                         // Run post-section-merge edit filter
1357                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
1358                                 # Error messages etc. could be handled within the hook...
1359                                 $status->fatal( 'hookaborted' );
1360                                 $status->value = self::AS_HOOK_ERROR;
1361                                 wfProfileOut( __METHOD__ );
1362                                 return $status;
1363                         } elseif ( $this->hookError != '' ) {
1364                                 # ...or the hook could be expecting us to produce an error
1365                                 $status->fatal( 'hookaborted' );
1366                                 $status->value = self::AS_HOOK_ERROR_EXPECTED;
1367                                 wfProfileOut( __METHOD__ );
1368                                 return $status;
1369                         }
1370
1371                         $content = $textbox_content;
1372
1373                         $result['sectionanchor'] = '';
1374                         if ( $this->section == 'new' ) {
1375                                 if ( $this->sectiontitle !== '' ) {
1376                                         // Insert the section title above the content.
1377                                         $content = $content->addSectionHeader( $this->sectiontitle );
1378
1379                                         // Jump to the new section
1380                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1381
1382                                         // If no edit summary was specified, create one automatically from the section
1383                                         // title and have it link to the new section. Otherwise, respect the summary as
1384                                         // passed.
1385                                         if ( $this->summary === '' ) {
1386                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1387                                                 $this->summary = wfMessage( 'newsectionsummary', $cleanSectionTitle )
1388                                                         ->inContentLanguage()->text() ;
1389                                         }
1390                                 } elseif ( $this->summary !== '' ) {
1391                                         // Insert the section title above the content.
1392                                         $content = $content->addSectionHeader( $this->summary );
1393
1394                                         // Jump to the new section
1395                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1396
1397                                         // Create a link to the new section from the edit summary.
1398                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1399                                         $this->summary = wfMessage( 'newsectionsummary', $cleanSummary )
1400                                                 ->inContentLanguage()->text();
1401                                 }
1402                         }
1403
1404                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1405
1406                 } else { # not $new
1407
1408                         # Article exists. Check for edit conflict.
1409
1410                         $this->mArticle->clear(); # Force reload of dates, etc.
1411                         $timestamp = $this->mArticle->getTimestamp();
1412
1413                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1414
1415                         if ( $timestamp != $this->edittime ) {
1416                                 $this->isConflict = true;
1417                                 if ( $this->section == 'new' ) {
1418                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1419                                                 $this->mArticle->getComment() == $this->summary ) {
1420                                                 // Probably a duplicate submission of a new comment.
1421                                                 // This can happen when squid resends a request after
1422                                                 // a timeout but the first one actually went through.
1423                                                 wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
1424                                         } else {
1425                                                 // New comment; suppress conflict.
1426                                                 $this->isConflict = false;
1427                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1428                                         }
1429                                 } elseif ( $this->section == '' && Revision::userWasLastToEdit( DB_MASTER,  $this->mTitle->getArticleID(),
1430                                                         $wgUser->getId(), $this->edittime ) ) {
1431                                         # Suppress edit conflict with self, except for section edits where merging is required.
1432                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1433                                         $this->isConflict = false;
1434                                 }
1435                         }
1436
1437                         // If sectiontitle is set, use it, otherwise use the summary as the section title (for
1438                         // backwards compatibility with old forms/bots).
1439                         if ( $this->sectiontitle !== '' ) {
1440                                 $sectionTitle = $this->sectiontitle;
1441                         } else {
1442                                 $sectionTitle = $this->summary;
1443                         }
1444
1445                         $content = null;
1446
1447                         if ( $this->isConflict ) {
1448                                 wfDebug( __METHOD__ . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1449                                                 . " (article time '{$timestamp}')\n" );
1450
1451                                 $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle, $this->edittime );
1452                         } else {
1453                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1454                                 $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle );
1455                         }
1456
1457                         if ( is_null( $content ) ) {
1458                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1459                                 $this->isConflict = true;
1460                                 $content = $textbox_content; // do not try to merge here!
1461                         } elseif ( $this->isConflict ) {
1462                                 # Attempt merge
1463                                 if ( $this->mergeChangesIntoContent( $textbox_content ) ) {
1464                                         // Successful merge! Maybe we should tell the user the good news?
1465                                         $this->isConflict = false;
1466                                         $content = $textbox_content;
1467                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1468                                 } else {
1469                                         $this->section = '';
1470                                         #$this->textbox1 = $text; #redundant, nothing to do here?
1471                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1472                                 }
1473                         }
1474
1475                         if ( $this->isConflict ) {
1476                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1477                                 wfProfileOut( __METHOD__ );
1478                                 return $status;
1479                         }
1480
1481                         // Run post-section-merge edit filter
1482                         $hook_args = array( $this, $content, &$this->hookError, $this->summary );
1483
1484                         if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged', $hook_args )
1485                                 || !wfRunHooks( 'EditFilterMergedContent', $hook_args ) ) {
1486                                 # Error messages etc. could be handled within the hook...
1487                                 $status->fatal( 'hookaborted' );
1488                                 $status->value = self::AS_HOOK_ERROR;
1489                                 wfProfileOut( __METHOD__ );
1490                                 return $status;
1491                         } elseif ( $this->hookError != '' ) {
1492                                 # ...or the hook could be expecting us to produce an error
1493                                 $status->fatal( 'hookaborted' );
1494                                 $status->value = self::AS_HOOK_ERROR_EXPECTED;
1495                                 wfProfileOut( __METHOD__ );
1496                                 return $status;
1497                         }
1498
1499                         # Handle the user preference to force summaries here, but not for null edits
1500                         if ( $this->section != 'new' && !$this->allowBlankSummary
1501                                 && !$content->equals( $this->getOriginalContent() )
1502                                 && !$content->isRedirect() ) # check if it's not a redirect
1503                         {
1504                                 if ( md5( $this->summary ) == $this->autoSumm ) {
1505                                         $this->missingSummary = true;
1506                                         $status->fatal( 'missingsummary' );
1507                                         $status->value = self::AS_SUMMARY_NEEDED;
1508                                         wfProfileOut( __METHOD__ );
1509                                         return $status;
1510                                 }
1511                         }
1512
1513                         # And a similar thing for new sections
1514                         if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1515                                 if ( trim( $this->summary ) == '' ) {
1516                                         $this->missingSummary = true;
1517                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1518                                         $status->value = self::AS_SUMMARY_NEEDED;
1519                                         wfProfileOut( __METHOD__ );
1520                                         return $status;
1521                                 }
1522                         }
1523
1524                         # All's well
1525                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1526                         $sectionanchor = '';
1527                         if ( $this->section == 'new' ) {
1528                                 if ( $this->textbox1 == '' ) {
1529                                         $this->missingComment = true;
1530                                         $status->fatal( 'missingcommenttext' );
1531                                         $status->value = self::AS_TEXTBOX_EMPTY;
1532                                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1533                                         wfProfileOut( __METHOD__ );
1534                                         return $status;
1535                                 }
1536                                 if ( $this->sectiontitle !== '' ) {
1537                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1538                                         // If no edit summary was specified, create one automatically from the section
1539                                         // title and have it link to the new section. Otherwise, respect the summary as
1540                                         // passed.
1541                                         if ( $this->summary === '' ) {
1542                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1543                                                 $this->summary = wfMessage( 'newsectionsummary', $cleanSectionTitle )
1544                                                         ->inContentLanguage()->text();
1545                                         }
1546                                 } elseif ( $this->summary !== '' ) {
1547                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1548                                         # This is a new section, so create a link to the new section
1549                                         # in the revision summary.
1550                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1551                                         $this->summary = wfMessage( 'newsectionsummary', $cleanSummary )
1552                                                 ->inContentLanguage()->text();
1553                                 }
1554                         } elseif ( $this->section != '' ) {
1555                                 # Try to get a section anchor from the section source, redirect to edited section if header found
1556                                 # XXX: might be better to integrate this into Article::replaceSection
1557                                 # for duplicate heading checking and maybe parsing
1558                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1559                                 # we can't deal with anchors, includes, html etc in the header for now,
1560                                 # headline would need to be parsed to improve this
1561                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1562                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1563                                 }
1564                         }
1565                         $result['sectionanchor'] = $sectionanchor;
1566                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1567
1568                         // Save errors may fall down to the edit form, but we've now
1569                         // merged the section into full text. Clear the section field
1570                         // so that later submission of conflict forms won't try to
1571                         // replace that into a duplicated mess.
1572                         $this->textbox1 = $this->toEditText( $content );
1573                         $this->section = '';
1574
1575                         $status->value = self::AS_SUCCESS_UPDATE;
1576                 }
1577
1578                 // Check for length errors again now that the section is merged in
1579                         $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1580                 if ( $this->kblength > $wgMaxArticleSize ) {
1581                         $this->tooBig = true;
1582                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1583                         wfProfileOut( __METHOD__ );
1584                         return $status;
1585                 }
1586
1587                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1588                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1589                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1590                         ( $bot ? EDIT_FORCE_BOT : 0 );
1591
1592                         $doEditStatus = $this->mArticle->doEditContent( $content, $this->summary, $flags,
1593                                                                                                                         false, null, $this->contentFormat );
1594
1595                 if ( $doEditStatus->isOK() ) {
1596                                 $result['redirect'] = $content->isRedirect();
1597                         $this->commitWatch();
1598                         wfProfileOut( __METHOD__ );
1599                         return $status;
1600                 } else {
1601                         // Failure from doEdit()
1602                         // Show the edit conflict page for certain recognized errors from doEdit(),
1603                         // but don't show it for errors from extension hooks
1604                         $errors = $doEditStatus->getErrorsArray();
1605                         if ( in_array( $errors[0][0], array( 'edit-gone-missing', 'edit-conflict',
1606                                 'edit-already-exists' ) ) )
1607                         {
1608                                 $this->isConflict = true;
1609                                 // Destroys data doEdit() put in $status->value but who cares
1610                                 $doEditStatus->value = self::AS_END;
1611                         }
1612                         wfProfileOut( __METHOD__ );
1613                         return $doEditStatus;
1614                 }
1615         }
1616
1617         /**
1618          * Commit the change of watch status
1619          */
1620         protected function commitWatch() {
1621                 global $wgUser;
1622                 if ( $wgUser->isLoggedIn() && $this->watchthis != $wgUser->isWatched( $this->mTitle ) ) {
1623                         $dbw = wfGetDB( DB_MASTER );
1624                         $dbw->begin( __METHOD__ );
1625                         if ( $this->watchthis ) {
1626                                 WatchAction::doWatch( $this->mTitle, $wgUser );
1627                         } else {
1628                                 WatchAction::doUnwatch( $this->mTitle, $wgUser );
1629                         }
1630                         $dbw->commit( __METHOD__ );
1631                 }
1632         }
1633
1634         /**
1635          * @private
1636          * @todo document
1637          *
1638          * @param $editText string
1639          *
1640          * @return bool
1641          * @deprecated since 1.21, use mergeChangesIntoContent() instead
1642          */
1643         function mergeChangesInto( &$editText ){
1644                 wfDebug( __METHOD__, "1.21" );
1645
1646                 $editContent = $this->toEditContent( $editText );
1647
1648                 $ok = $this->mergeChangesIntoContent( $editContent );
1649
1650                 if ( $ok ) {
1651                         $editText = $this->toEditText( $editContent );
1652                         return true;
1653                 } else {
1654                         return false;
1655                 }
1656         }
1657
1658         /**
1659          * @private
1660          * @todo document
1661          *
1662          * @parma $editText string
1663          *
1664          * @return bool
1665          * @since since 1.WD
1666          */
1667         private function mergeChangesIntoContent( &$editContent ){
1668                 wfProfileIn( __METHOD__ );
1669
1670                 $db = wfGetDB( DB_MASTER );
1671
1672                 // This is the revision the editor started from
1673                 $baseRevision = $this->getBaseRevision();
1674                 if ( is_null( $baseRevision ) ) {
1675                         wfProfileOut( __METHOD__ );
1676                         return false;
1677                 }
1678                 $baseContent = $baseRevision->getContent();
1679
1680                 // The current state, we want to merge updates into it
1681                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1682                 if ( is_null( $currentRevision ) ) {
1683                         wfProfileOut( __METHOD__ );
1684                         return false;
1685                 }
1686                 $currentContent = $currentRevision->getContent();
1687
1688                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
1689
1690                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
1691
1692                 if ( $result ) {
1693                         $editContent = $result;
1694                         wfProfileOut( __METHOD__ );
1695                         return true;
1696                 } else {
1697                         wfProfileOut( __METHOD__ );
1698                         return false;
1699                 }
1700         }
1701
1702         /**
1703          * @return Revision
1704          */
1705         function getBaseRevision() {
1706                 if ( !$this->mBaseRevision ) {
1707                         $db = wfGetDB( DB_MASTER );
1708                         $baseRevision = Revision::loadFromTimestamp(
1709                                 $db, $this->mTitle, $this->edittime );
1710                         return $this->mBaseRevision = $baseRevision;
1711                 } else {
1712                         return $this->mBaseRevision;
1713                 }
1714         }
1715
1716         /**
1717          * Check given input text against $wgSpamRegex, and return the text of the first match.
1718          *
1719          * @param $text string
1720          *
1721          * @return string|bool matching string or false
1722          */
1723         public static function matchSpamRegex( $text ) {
1724                 global $wgSpamRegex;
1725                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1726                 $regexes = (array)$wgSpamRegex;
1727                 return self::matchSpamRegexInternal( $text, $regexes );
1728         }
1729
1730         /**
1731          * Check given input text against $wgSpamRegex, and return the text of the first match.
1732          *
1733          * @param $text string
1734          *
1735          * @return string|bool  matching string or false
1736          */
1737         public static function matchSummarySpamRegex( $text ) {
1738                 global $wgSummarySpamRegex;
1739                 $regexes = (array)$wgSummarySpamRegex;
1740                 return self::matchSpamRegexInternal( $text, $regexes );
1741         }
1742
1743         /**
1744          * @param $text string
1745          * @param $regexes array
1746          * @return bool|string
1747          */
1748         protected static function matchSpamRegexInternal( $text, $regexes ) {
1749                 foreach ( $regexes as $regex ) {
1750                         $matches = array();
1751                         if ( preg_match( $regex, $text, $matches ) ) {
1752                                 return $matches[0];
1753                         }
1754                 }
1755                 return false;
1756         }
1757
1758         function setHeaders() {
1759                 global $wgOut, $wgUser;
1760
1761                 $wgOut->addModules( 'mediawiki.action.edit' );
1762
1763                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
1764                         $wgOut->addModules( 'mediawiki.legacy.preview' );
1765                 }
1766                 // Bug #19334: textarea jumps when editing articles in IE8
1767                 $wgOut->addStyle( 'common/IE80Fixes.css', 'screen', 'IE 8' );
1768
1769                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1770
1771                 # Enabled article-related sidebar, toplinks, etc.
1772                 $wgOut->setArticleRelated( true );
1773
1774                 $contextTitle = $this->getContextTitle();
1775                 if ( $this->isConflict ) {
1776                         $msg = 'editconflict';
1777                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
1778                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1779                 } else {
1780                         $msg = $contextTitle->exists() || ( $contextTitle->getNamespace() == NS_MEDIAWIKI && $contextTitle->getDefaultMessageText() !== false ) ?
1781                                 'editing' : 'creating';
1782                 }
1783                 # Use the title defined by DISPLAYTITLE magic word when present
1784                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
1785                 if ( $displayTitle === false ) {
1786                         $displayTitle = $contextTitle->getPrefixedText();
1787                 }
1788                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
1789         }
1790
1791         /**
1792          * Show all applicable editing introductions
1793          */
1794         protected function showIntro() {
1795                 global $wgOut, $wgUser;
1796                 if ( $this->suppressIntro ) {
1797                         return;
1798                 }
1799
1800                 $namespace = $this->mTitle->getNamespace();
1801
1802                 if ( $namespace == NS_MEDIAWIKI ) {
1803                         # Show a warning if editing an interface message
1804                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
1805                 } else if( $namespace == NS_FILE ) {
1806                         # Show a hint to shared repo
1807                         $file = wfFindFile( $this->mTitle );
1808                         if( $file && !$file->isLocal() ) {
1809                                 $descUrl = $file->getDescriptionUrl();
1810                                 # there must be a description url to show a hint to shared repo
1811                                 if( $descUrl ) {
1812                                         if( !$this->mTitle->exists() ) {
1813                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array (
1814                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
1815                                                 ) );
1816                                         } else {
1817                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
1818                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
1819                                                 ) );
1820                                         }
1821                                 }
1822                         }
1823                 }
1824
1825                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
1826                 # Show log extract when the user is currently blocked
1827                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
1828                         $parts = explode( '/', $this->mTitle->getText(), 2 );
1829                         $username = $parts[0];
1830                         $user = User::newFromName( $username, false /* allow IP users*/ );
1831                         $ip = User::isIP( $username );
1832                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
1833                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
1834                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
1835                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
1836                                 LogEventsList::showLogExtract(
1837                                         $wgOut,
1838                                         'block',
1839                                         $user->getUserPage(),
1840                                         '',
1841                                         array(
1842                                                 'lim' => 1,
1843                                                 'showIfEmpty' => false,
1844                                                 'msgKey' => array(
1845                                                         'blocked-notice-logextract',
1846                                                         $user->getName() # Support GENDER in notice
1847                                                 )
1848                                         )
1849                                 );
1850                         }
1851                 }
1852                 # Try to add a custom edit intro, or use the standard one if this is not possible.
1853                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
1854                         if ( $wgUser->isLoggedIn() ) {
1855                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
1856                         } else {
1857                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
1858                         }
1859                 }
1860                 # Give a notice if the user is editing a deleted/moved page...
1861                 if ( !$this->mTitle->exists() ) {
1862                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
1863                                 '', array( 'lim' => 10,
1864                                            'conds' => array( "log_action != 'revision'" ),
1865                                            'showIfEmpty' => false,
1866                                            'msgKey' => array( 'recreate-moveddeleted-warn' ) )
1867                         );
1868                 }
1869         }
1870
1871         /**
1872          * Attempt to show a custom editing introduction, if supplied
1873          *
1874          * @return bool
1875          */
1876         protected function showCustomIntro() {
1877                 if ( $this->editintro ) {
1878                         $title = Title::newFromText( $this->editintro );
1879                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
1880                                 global $wgOut;
1881                                 // Added using template syntax, to take <noinclude>'s into account.
1882                                 $wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
1883                                 return true;
1884                         } else {
1885                                 return false;
1886                         }
1887                 } else {
1888                         return false;
1889                 }
1890         }
1891
1892         /**
1893          * Gets an editable textual representation of the given Content object.
1894          * The textual representation can be turned by into a Content object by the
1895          * toEditContent() method.
1896          *
1897          * If the given Content object is not of a type that can be edited using the text base EditPage,
1898          * an exception will be raised. Set $this->allowNonTextContent to true to allow editing of non-textual
1899          * content.
1900          *
1901          * @param Content $content
1902          * @return String the editable text form of the content.
1903          *
1904          * @throws MWException if $content is not an instance of TextContent and $this->allowNonTextContent is not true.
1905          */
1906         protected function toEditText( Content $content ) {
1907                 if ( !$this->allowNonTextContent && !( $content instanceof TextContent ) ) {
1908                         throw new MWException( "This content model can not be edited as text: "
1909                                                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
1910                 }
1911
1912                 return $content->serialize( $this->contentFormat );
1913         }
1914
1915         /**
1916          * Turns the given text into a Content object by unserializing it.
1917          *
1918          * If the resulting Content object is not of a type that can be edited using the text base EditPage,
1919          * an exception will be raised. Set $this->allowNonTextContent to true to allow editing of non-textual
1920          * content.
1921          *
1922          * @param String $text Text to unserialize
1923          * @return Content the content object created from $text
1924          *
1925          * @throws MWException if unserializing the text results in a Content object that is not an instance of TextContent
1926          *          and $this->allowNonTextContent is not true.
1927          */
1928         protected function toEditContent( $text ) {
1929                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
1930                         $this->contentModel, $this->contentFormat );
1931
1932                 if ( !$this->allowNonTextContent && !( $content instanceof TextContent ) ) {
1933                         throw new MWException( "This content model can not be edited as text: "
1934                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
1935                 }
1936
1937                 return $content;
1938         }
1939
1940         /**
1941          * Send the edit form and related headers to $wgOut
1942          * @param $formCallback Callback that takes an OutputPage parameter; will be called
1943          *     during form output near the top, for captchas and the like.
1944          */
1945         function showEditForm( $formCallback = null ) {
1946                 global $wgOut, $wgUser;
1947
1948                 wfProfileIn( __METHOD__ );
1949
1950                 # need to parse the preview early so that we know which templates are used,
1951                 # otherwise users with "show preview after edit box" will get a blank list
1952                 # we parse this near the beginning so that setHeaders can do the title
1953                 # setting work instead of leaving it in getPreviewText
1954                 $previewOutput = '';
1955                 if ( $this->formtype == 'preview' ) {
1956                         $previewOutput = $this->getPreviewText();
1957                 }
1958
1959                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
1960
1961                 $this->setHeaders();
1962
1963                 if ( $this->showHeader() === false ) {
1964                         wfProfileOut( __METHOD__ );
1965                         return;
1966                 }
1967
1968                 $wgOut->addHTML( $this->editFormPageTop );
1969
1970                 if ( $wgUser->getOption( 'previewontop' ) ) {
1971                         $this->displayPreviewArea( $previewOutput, true );
1972                 }
1973
1974                 $wgOut->addHTML( $this->editFormTextTop );
1975
1976                 $showToolbar = true;
1977                 if ( $this->wasDeletedSinceLastEdit() ) {
1978                         if ( $this->formtype == 'save' ) {
1979                                 // Hide the toolbar and edit area, user can click preview to get it back
1980                                 // Add an confirmation checkbox and explanation.
1981                                 $showToolbar = false;
1982                         } else {
1983                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
1984                                         'deletedwhileediting' );
1985                         }
1986                 }
1987
1988                 //@todo: add EditForm plugin interface and use it here!
1989                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
1990                 $wgOut->addHTML( Html::openElement( 'form', array( 'id' => self::EDITFORM_ID, 'name' => self::EDITFORM_ID,
1991                         'method' => 'post', 'action' => $this->getActionURL( $this->getContextTitle() ),
1992                         'enctype' => 'multipart/form-data' ) ) );
1993
1994                 if ( is_callable( $formCallback ) ) {
1995                         call_user_func_array( $formCallback, array( &$wgOut ) );
1996                 }
1997
1998                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1999
2000                 // Put these up at the top to ensure they aren't lost on early form submission
2001                 $this->showFormBeforeText();
2002
2003                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2004                         $username = $this->lastDelete->user_name;
2005                         $comment = $this->lastDelete->log_comment;
2006
2007                         // It is better to not parse the comment at all than to have templates expanded in the middle
2008                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2009                         $key = $comment === ''
2010                                 ? 'confirmrecreate-noreason'
2011                                 : 'confirmrecreate';
2012                         $wgOut->addHTML(
2013                                 '<div class="mw-confirm-recreate">' .
2014                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2015                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2016                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2017                                 ) .
2018                                 '</div>'
2019                         );
2020                 }
2021
2022                 # When the summary is hidden, also hide them on preview/show changes
2023                 if( $this->nosummary ) {
2024                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2025                 }
2026
2027                 # If a blank edit summary was previously provided, and the appropriate
2028                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2029                 # user being bounced back more than once in the event that a summary
2030                 # is not required.
2031                 #####
2032                 # For a bit more sophisticated detection of blank summaries, hash the
2033                 # automatic one and pass that in the hidden field wpAutoSummary.
2034                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2035                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2036                 }
2037
2038                 if ( $this->undidRev ) {
2039                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2040                 }
2041
2042                 if ( $this->hasPresetSummary ) {
2043                         // If a summary has been preset using &summary= we dont want to prompt for
2044                         // a different summary. Only prompt for a summary if the summary is blanked.
2045                         // (Bug 17416)
2046                         $this->autoSumm = md5( '' );
2047                 }
2048
2049                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2050                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2051
2052                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2053
2054                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2055                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2056
2057                 if ( $this->section == 'new' ) {
2058                         $this->showSummaryInput( true, $this->summary );
2059                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2060                 }
2061
2062                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2063
2064                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2065                         $wgOut->addHTML( EditPage::getEditToolbar() );
2066                 }
2067
2068                 if ( $this->isConflict ) {
2069                         // In an edit conflict bypass the overrideable content form method
2070                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2071                         // resolved between page source edits and custom ui edits using the
2072                         // custom edit ui.
2073                         $this->textbox2 = $this->textbox1;
2074
2075                         $content = $this->getCurrentContent();
2076                         $this->textbox1 = $this->toEditText( $content );
2077
2078                         $this->showTextbox1();
2079                 } else {
2080                         $this->showContentForm();
2081                 }
2082
2083                 $wgOut->addHTML( $this->editFormTextAfterContent );
2084
2085                 $this->showStandardInputs();
2086
2087                 $this->showFormAfterText();
2088
2089                 $this->showTosSummary();
2090
2091                 $this->showEditTools();
2092
2093                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2094
2095                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2096                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2097
2098                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2099                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2100
2101                 if ( $this->isConflict ) {
2102                         try {
2103                                 $this->showConflict();
2104                         } catch ( MWContentSerializationException $ex ) {
2105                                 // this can't really happen, but be nice if it does.
2106                                 $msg = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
2107                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>');
2108                         }
2109                 }
2110
2111                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2112
2113                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2114                         $this->displayPreviewArea( $previewOutput, false );
2115                 }
2116
2117                 wfProfileOut( __METHOD__ );
2118         }
2119
2120         /**
2121          * Extract the section title from current section text, if any.
2122          *
2123          * @param string $text
2124          * @return Mixed|string or false
2125          */
2126         public static function extractSectionTitle( $text ) {
2127                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2128                 if ( !empty( $matches[2] ) ) {
2129                         global $wgParser;
2130                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2131                 } else {
2132                         return false;
2133                 }
2134         }
2135
2136         protected function showHeader() {
2137                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2138
2139                 if ( $this->mTitle->isTalkPage() ) {
2140                         $wgOut->addWikiMsg( 'talkpagetext' );
2141                 }
2142
2143                 # Optional notices on a per-namespace and per-page basis
2144                 $editnotice_ns = 'editnotice-' . $this->mTitle->getNamespace();
2145                 $editnotice_ns_message = wfMessage( $editnotice_ns );
2146                 if ( $editnotice_ns_message->exists() ) {
2147                         $wgOut->addWikiText( $editnotice_ns_message->plain() );
2148                 }
2149                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
2150                         $parts = explode( '/', $this->mTitle->getDBkey() );
2151                         $editnotice_base = $editnotice_ns;
2152                         while ( count( $parts ) > 0 ) {
2153                                 $editnotice_base .= '-' . array_shift( $parts );
2154                                 $editnotice_base_msg = wfMessage( $editnotice_base );
2155                                 if ( $editnotice_base_msg->exists() ) {
2156                                         $wgOut->addWikiText( $editnotice_base_msg->plain() );
2157                                 }
2158                         }
2159                 } else {
2160                         # Even if there are no subpages in namespace, we still don't want / in MW ns.
2161                         $editnoticeText = $editnotice_ns . '-' . str_replace( '/', '-', $this->mTitle->getDBkey() );
2162                         $editnoticeMsg = wfMessage( $editnoticeText );
2163                         if ( $editnoticeMsg->exists() ) {
2164                                 $wgOut->addWikiText( $editnoticeMsg->plain() );
2165                         }
2166                 }
2167
2168                 if ( $this->isConflict ) {
2169                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2170                         $this->edittime = $this->mArticle->getTimestamp();
2171                 } else {
2172                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2173                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2174                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2175                                 // Someone is welcome to try refactoring though
2176                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2177                                 return false;
2178                         }
2179
2180                         if ( $this->section != '' && $this->section != 'new' ) {
2181                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2182                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); //FIXME: use Content object
2183                                         if ( $sectionTitle !== false ) {
2184                                                 $this->summary = "/* $sectionTitle */ ";
2185                                         }
2186                                 }
2187                         }
2188
2189                         if ( $this->missingComment ) {
2190                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2191                         }
2192
2193                         if ( $this->missingSummary && $this->section != 'new' ) {
2194                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2195                         }
2196
2197                         if ( $this->missingSummary && $this->section == 'new' ) {
2198                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2199                         }
2200
2201                         if ( $this->hookError !== '' ) {
2202                                 $wgOut->addWikiText( $this->hookError );
2203                         }
2204
2205                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2206                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2207                         }
2208
2209                         if ( $this->section != 'new' ) {
2210                                 $revision = $this->mArticle->getRevisionFetched();
2211                                 if ( $revision ) {
2212                                         // Let sysop know that this will make private content public if saved
2213
2214                                         if ( !$revision->userCan( Revision::DELETED_TEXT ) ) {
2215                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
2216                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2217                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
2218                                         }
2219
2220                                         if ( !$revision->isCurrent() ) {
2221                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2222                                                 $wgOut->addWikiMsg( 'editingold' );
2223                                         }
2224                                 } elseif ( $this->mTitle->exists() ) {
2225                                         // Something went wrong
2226
2227                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2228                                                 array( 'missing-revision', $this->oldid ) );
2229                                 }
2230                         }
2231                 }
2232
2233                 if ( wfReadOnly() ) {
2234                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
2235                 } elseif ( $wgUser->isAnon() ) {
2236                         if ( $this->formtype != 'preview' ) {
2237                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
2238                         } else {
2239                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
2240                         }
2241                 } else {
2242                         if ( $this->isCssJsSubpage ) {
2243                                 # Check the skin exists
2244                                 if ( $this->isWrongCaseCssJsPage ) {
2245                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
2246                                 }
2247                                 if ( $this->formtype !== 'preview' ) {
2248                                         if ( $this->isCssSubpage )
2249                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
2250                                         if ( $this->isJsSubpage )
2251                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
2252                                 }
2253                         }
2254                 }
2255
2256                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2257                         # Is the title semi-protected?
2258                         if ( $this->mTitle->isSemiProtected() ) {
2259                                 $noticeMsg = 'semiprotectedpagewarning';
2260                         } else {
2261                                 # Then it must be protected based on static groups (regular)
2262                                 $noticeMsg = 'protectedpagewarning';
2263                         }
2264                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2265                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2266                 }
2267                 if ( $this->mTitle->isCascadeProtected() ) {
2268                         # Is this page under cascading protection from some source pages?
2269                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2270                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2271                         $cascadeSourcesCount = count( $cascadeSources );
2272                         if ( $cascadeSourcesCount > 0 ) {
2273                                 # Explain, and list the titles responsible
2274                                 foreach ( $cascadeSources as $page ) {
2275                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2276                                 }
2277                         }
2278                         $notice .= '</div>';
2279                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2280                 }
2281                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2282                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2283                                 array( 'lim' => 1,
2284                                         'showIfEmpty' => false,
2285                                         'msgKey' => array( 'titleprotectedwarning' ),
2286                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2287                 }
2288
2289                 if ( $this->kblength === false ) {
2290                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2291                 }
2292
2293                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2294                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2295                                 array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
2296                 } else {
2297                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2298                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2299                                         array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
2300                                 );
2301                         }
2302                 }
2303                 # Add header copyright warning
2304                 $this->showHeaderCopyrightWarning();
2305         }
2306
2307
2308         /**
2309          * Standard summary input and label (wgSummary), abstracted so EditPage
2310          * subclasses may reorganize the form.
2311          * Note that you do not need to worry about the label's for=, it will be
2312          * inferred by the id given to the input. You can remove them both by
2313          * passing array( 'id' => false ) to $userInputAttrs.
2314          *
2315          * @param $summary string The value of the summary input
2316          * @param $labelText string The html to place inside the label
2317          * @param $inputAttrs array of attrs to use on the input
2318          * @param $spanLabelAttrs array of attrs to use on the span inside the label
2319          *
2320          * @return array An array in the format array( $label, $input )
2321          */
2322         function getSummaryInput( $summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null ) {
2323                 // Note: the maxlength is overriden in JS to 255 and to make it use UTF-8 bytes, not characters.
2324                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2325                         'id' => 'wpSummary',
2326                         'maxlength' => '200',
2327                         'tabindex' => '1',
2328                         'size' => 60,
2329                         'spellcheck' => 'true',
2330                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2331
2332                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2333                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2334                         'id' => "wpSummaryLabel"
2335                 );
2336
2337                 $label = null;
2338                 if ( $labelText ) {
2339                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
2340                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2341                 }
2342
2343                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2344
2345                 return array( $label, $input );
2346         }
2347
2348         /**
2349          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2350          *                          up top, or false if this is the comment summary
2351          *                          down below the textarea
2352          * @param $summary String: The text of the summary to display
2353          * @return String
2354          */
2355         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2356                 global $wgOut, $wgContLang;
2357                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2358                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2359                 if ( $isSubjectPreview ) {
2360                         if ( $this->nosummary ) {
2361                                 return;
2362                         }
2363                 } else {
2364                         if ( !$this->mShowSummaryField ) {
2365                                 return;
2366                         }
2367                 }
2368                 $summary = $wgContLang->recodeForEdit( $summary );
2369                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2370                 list( $label, $input ) = $this->getSummaryInput( $summary, $labelText, array( 'class' => $summaryClass ), array() );
2371                 $wgOut->addHTML( "{$label} {$input}" );
2372         }
2373
2374         /**
2375          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2376          *                          up top, or false if this is the comment summary
2377          *                          down below the textarea
2378          * @param $summary String: the text of the summary to display
2379          * @return String
2380          */
2381         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2382                 if ( !$summary || ( !$this->preview && !$this->diff ) )
2383                         return "";
2384
2385                 global $wgParser;
2386
2387                 if ( $isSubjectPreview )
2388                         $summary = wfMessage( 'newsectionsummary', $wgParser->stripSectionName( $summary ) )
2389                                 ->inContentLanguage()->text();
2390
2391                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2392
2393                 $summary = wfMessage( $message )->parse() . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2394                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2395         }
2396
2397         protected function showFormBeforeText() {
2398                 global $wgOut;
2399                 $section = htmlspecialchars( $this->section );
2400                 $wgOut->addHTML( <<<HTML
2401 <input type='hidden' value="{$section}" name="wpSection" />
2402 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2403 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2404 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2405
2406 HTML
2407                 );
2408                 if ( !$this->checkUnicodeCompliantBrowser() )
2409                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2410         }
2411
2412         protected function showFormAfterText() {
2413                 global $wgOut, $wgUser;
2414                 /**
2415                  * To make it harder for someone to slip a user a page
2416                  * which submits an edit form to the wiki without their
2417                  * knowledge, a random token is associated with the login
2418                  * session. If it's not passed back with the submission,
2419                  * we won't save the page, or render user JavaScript and
2420                  * CSS previews.
2421                  *
2422                  * For anon editors, who may not have a session, we just
2423                  * include the constant suffix to prevent editing from
2424                  * broken text-mangling proxies.
2425                  */
2426                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2427         }
2428
2429         /**
2430          * Subpage overridable method for printing the form for page content editing
2431          * By default this simply outputs wpTextbox1
2432          * Subclasses can override this to provide a custom UI for editing;
2433          * be it a form, or simply wpTextbox1 with a modified content that will be
2434          * reverse modified when extracted from the post data.
2435          * Note that this is basically the inverse for importContentFormData
2436          */
2437         protected function showContentForm() {
2438                 $this->showTextbox1();
2439         }
2440
2441         /**
2442          * Method to output wpTextbox1
2443          * The $textoverride method can be used by subclasses overriding showContentForm
2444          * to pass back to this method.
2445          *
2446          * @param $customAttribs array of html attributes to use in the textarea
2447          * @param $textoverride String: optional text to override $this->textarea1 with
2448          */
2449         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2450                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2451                         $attribs = array( 'style' => 'display:none;' );
2452                 } else {
2453                         $classes = array(); // Textarea CSS
2454                         if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2455                                 # Is the title semi-protected?
2456                                 if ( $this->mTitle->isSemiProtected() ) {
2457                                         $classes[] = 'mw-textarea-sprotected';
2458                                 } else {
2459                                         # Then it must be protected based on static groups (regular)
2460                                         $classes[] = 'mw-textarea-protected';
2461                                 }
2462                                 # Is the title cascade-protected?
2463                                 if ( $this->mTitle->isCascadeProtected() ) {
2464                                         $classes[] = 'mw-textarea-cprotected';
2465                                 }
2466                         }
2467
2468                         $attribs = array( 'tabindex' => 1 );
2469
2470                         if ( is_array( $customAttribs ) ) {
2471                                 $attribs += $customAttribs;
2472                         }
2473
2474                         if ( count( $classes ) ) {
2475                                 if ( isset( $attribs['class'] ) ) {
2476                                         $classes[] = $attribs['class'];
2477                                 }
2478                                 $attribs['class'] = implode( ' ', $classes );
2479                         }
2480                 }
2481
2482                 $this->showTextbox( $textoverride !== null ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
2483         }
2484
2485         protected function showTextbox2() {
2486                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2487         }
2488
2489         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2490                 global $wgOut, $wgUser;
2491
2492                 $wikitext = $this->safeUnicodeOutput( $text );
2493                 if ( strval( $wikitext ) !== '' ) {
2494                         // Ensure there's a newline at the end, otherwise adding lines
2495                         // is awkward.
2496                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2497                         // mode will show an extra newline. A bit annoying.
2498                         $wikitext .= "\n";
2499                 }
2500
2501                 $attribs = $customAttribs + array(
2502                         'accesskey' => ',',
2503                         'id'   => $name,
2504                         'cols' => $wgUser->getIntOption( 'cols' ),
2505                         'rows' => $wgUser->getIntOption( 'rows' ),
2506                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
2507                 );
2508
2509                 $pageLang = $this->mTitle->getPageLanguage();
2510                 $attribs['lang'] = $pageLang->getCode();
2511                 $attribs['dir'] = $pageLang->getDir();
2512
2513                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2514         }
2515
2516         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2517                 global $wgOut;
2518                 $classes = array();
2519                 if ( $isOnTop )
2520                         $classes[] = 'ontop';
2521
2522                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2523
2524                 if ( $this->formtype != 'preview' )
2525                         $attribs['style'] = 'display: none;';
2526
2527                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2528
2529                 if ( $this->formtype == 'preview' ) {
2530                         $this->showPreview( $previewOutput );
2531                 }
2532
2533                 $wgOut->addHTML( '</div>' );
2534
2535                 if ( $this->formtype == 'diff' ) {
2536                         try {
2537                                 $this->showDiff();
2538                         } catch ( MWContentSerializationException $ex ) {
2539                                 $msg = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
2540                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>');
2541                         }
2542                 }
2543         }
2544
2545         /**
2546          * Append preview output to $wgOut.
2547          * Includes category rendering if this is a category page.
2548          *
2549          * @param $text String: the HTML to be output for the preview.
2550          */
2551         protected function showPreview( $text ) {
2552                 global $wgOut;
2553                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2554                         $this->mArticle->openShowCategory();
2555                 }
2556                 # This hook seems slightly odd here, but makes things more
2557                 # consistent for extensions.
2558                 wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
2559                 $wgOut->addHTML( $text );
2560                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2561                         $this->mArticle->closeShowCategory();
2562                 }
2563         }
2564
2565         /**
2566          * Get a diff between the current contents of the edit box and the
2567          * version of the page we're editing from.
2568          *
2569          * If this is a section edit, we'll replace the section as for final
2570          * save and then make a comparison.
2571          */
2572         function showDiff() {
2573                 global $wgUser, $wgContLang, $wgParser, $wgOut;
2574
2575                 $oldtitlemsg = 'currentrev';
2576                 # if message does not exist, show diff against the preloaded default
2577                 if( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
2578                         $oldtext = $this->mTitle->getDefaultMessageText();
2579                         if( $oldtext !== false ) {
2580                                 $oldtitlemsg = 'defaultmessagetext';
2581                                 $oldContent = $this->toEditContent( $oldtext );
2582                         } else {
2583                                 $oldContent = null;
2584                         }
2585                 } else {
2586                         $oldContent = $this->getOriginalContent();
2587                 }
2588
2589                 $textboxContent = $this->toEditContent( $this->textbox1 );
2590
2591                 $newContent = $this->mArticle->replaceSectionContent(
2592                                                         $this->section, $textboxContent,
2593                                                         $this->summary, $this->edittime );
2594
2595                 ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
2596                 wfRunHooks( 'EditPageGetDiffContent', array( $this, &$newContent ) );
2597
2598                 $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
2599                 $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
2600
2601                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
2602                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
2603                         $newtitle = wfMessage( 'yourtext' )->parse();
2604
2605                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
2606                         $de->setContent( $oldContent, $newContent );
2607
2608                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2609                         $de->showDiffStyle();
2610                 } else {
2611                         $difftext = '';
2612                 }
2613
2614                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2615         }
2616
2617         /**
2618          * Show the header copyright warning.
2619          */
2620         protected function showHeaderCopyrightWarning() {
2621                 $msg = 'editpage-head-copy-warn';
2622                 if ( !wfMessage( $msg )->isDisabled() ) {
2623                         global $wgOut;
2624                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
2625                                 'editpage-head-copy-warn' );
2626                 }
2627         }
2628
2629         /**
2630          * Give a chance for site and per-namespace customizations of
2631          * terms of service summary link that might exist separately
2632          * from the copyright notice.
2633          *
2634          * This will display between the save button and the edit tools,
2635          * so should remain short!
2636          */
2637         protected function showTosSummary() {
2638                 $msg = 'editpage-tos-summary';
2639                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
2640                 if ( !wfMessage( $msg )->isDisabled() ) {
2641                         global $wgOut;
2642                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
2643                         $wgOut->addWikiMsg( $msg );
2644                         $wgOut->addHTML( '</div>' );
2645                 }
2646         }
2647
2648         protected function showEditTools() {
2649                 global $wgOut;
2650                 $wgOut->addHTML( '<div class="mw-editTools">' .
2651                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
2652                         '</div>' );
2653         }
2654
2655         /**
2656          * Get the copyright warning
2657          *
2658          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
2659          */
2660         protected function getCopywarn() {
2661                 return self::getCopyrightWarning( $this->mTitle );
2662         }
2663
2664         public static function getCopyrightWarning( $title ) {
2665                 global $wgRightsText;
2666                 if ( $wgRightsText ) {
2667                         $copywarnMsg = array( 'copyrightwarning',
2668                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
2669                                 $wgRightsText );
2670                 } else {
2671                         $copywarnMsg = array( 'copyrightwarning2',
2672                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
2673                 }
2674                 // Allow for site and per-namespace customization of contribution/copyright notice.
2675                 wfRunHooks( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
2676
2677                 return "<div id=\"editpage-copywarn\">\n" .
2678                         call_user_func_array( 'wfMessage', $copywarnMsg )->plain() . "\n</div>";
2679         }
2680
2681         protected function showStandardInputs( &$tabindex = 2 ) {
2682                 global $wgOut;
2683                 $wgOut->addHTML( "<div class='editOptions'>\n" );
2684
2685                 if ( $this->section != 'new' ) {
2686                         $this->showSummaryInput( false, $this->summary );
2687                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
2688                 }
2689
2690                 $checkboxes = $this->getCheckboxes( $tabindex,
2691                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
2692                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
2693
2694                 // Show copyright warning.
2695                 $wgOut->addWikiText( $this->getCopywarn() );
2696                 $wgOut->addHTML( $this->editFormTextAfterWarn );
2697
2698                 $wgOut->addHTML( "<div class='editButtons'>\n" );
2699                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
2700
2701                 $cancel = $this->getCancelLink();
2702                 if ( $cancel !== '' ) {
2703                         $cancel .= wfMessage( 'pipe-separator' )->text();
2704                 }
2705                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMessage( 'edithelppage' )->inContentLanguage()->text() );
2706                 $edithelp = '<a target="helpwindow" href="' . $edithelpurl . '">' .
2707                         wfMessage( 'edithelp' )->escaped() . '</a> ' .
2708                         wfMessage( 'newwindow' )->parse();
2709                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
2710                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
2711                 $wgOut->addHTML( "</div><!-- editButtons -->\n</div><!-- editOptions -->\n" );
2712         }
2713
2714         /**
2715          * Show an edit conflict. textbox1 is already shown in showEditForm().
2716          * If you want to use another entry point to this function, be careful.
2717          */
2718         protected function showConflict() {
2719                 global $wgOut;
2720
2721                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
2722                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2723
2724                         $content1 = $this->toEditContent( $this->textbox1 );
2725                         $content2 = $this->toEditContent( $this->textbox2 );
2726
2727                         $handler = ContentHandler::getForModelID( $this->contentModel );
2728                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
2729                         $de->setContent( $content2, $content1 );
2730                         $de->showDiff(
2731                                 wfMessage( 'yourtext' )->parse(),
2732                                 wfMessage( 'storedversion' )->text()
2733                         );
2734
2735                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2736                         $this->showTextbox2();
2737                 }
2738         }
2739
2740         /**
2741          * @return string
2742          */
2743         public function getCancelLink() {
2744                 $cancelParams = array();
2745                 if ( !$this->isConflict && $this->oldid > 0 ) {
2746                         $cancelParams['oldid'] = $this->oldid;
2747                 }
2748
2749                 return Linker::linkKnown(
2750                         $this->getContextTitle(),
2751                         wfMessage( 'cancel' )->parse(),
2752                         array( 'id' => 'mw-editform-cancel' ),
2753                         $cancelParams
2754                 );
2755         }
2756
2757         /**
2758          * Returns the URL to use in the form's action attribute.
2759          * This is used by EditPage subclasses when simply customizing the action
2760          * variable in the constructor is not enough. This can be used when the
2761          * EditPage lives inside of a Special page rather than a custom page action.
2762          *
2763          * @param $title Title object for which is being edited (where we go to for &action= links)
2764          * @return string
2765          */
2766         protected function getActionURL( Title $title ) {
2767                 return $title->getLocalURL( array( 'action' => $this->action ) );
2768         }
2769
2770         /**
2771          * Check if a page was deleted while the user was editing it, before submit.
2772          * Note that we rely on the logging table, which hasn't been always there,
2773          * but that doesn't matter, because this only applies to brand new
2774          * deletes.
2775          */
2776         protected function wasDeletedSinceLastEdit() {
2777                 if ( $this->deletedSinceEdit !== null ) {
2778                         return $this->deletedSinceEdit;
2779                 }
2780
2781                 $this->deletedSinceEdit = false;
2782
2783                 if ( $this->mTitle->isDeletedQuick() ) {
2784                         $this->lastDelete = $this->getLastDelete();
2785                         if ( $this->lastDelete ) {
2786                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
2787                                 if ( $deleteTime > $this->starttime ) {
2788                                         $this->deletedSinceEdit = true;
2789                                 }
2790                         }
2791                 }
2792
2793                 return $this->deletedSinceEdit;
2794         }
2795
2796         protected function getLastDelete() {
2797                 $dbr = wfGetDB( DB_SLAVE );
2798                 $data = $dbr->selectRow(
2799                         array( 'logging', 'user' ),
2800                         array( 'log_type',
2801                                    'log_action',
2802                                    'log_timestamp',
2803                                    'log_user',
2804                                    'log_namespace',
2805                                    'log_title',
2806                                    'log_comment',
2807                                    'log_params',
2808                                    'log_deleted',
2809                                    'user_name' ),
2810                         array( 'log_namespace' => $this->mTitle->getNamespace(),
2811                                    'log_title' => $this->mTitle->getDBkey(),
2812                                    'log_type' => 'delete',
2813                                    'log_action' => 'delete',
2814                                    'user_id=log_user' ),
2815                         __METHOD__,
2816                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
2817                 );
2818                 // Quick paranoid permission checks...
2819                 if ( is_object( $data ) ) {
2820                         if ( $data->log_deleted & LogPage::DELETED_USER )
2821                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
2822                         if ( $data->log_deleted & LogPage::DELETED_COMMENT )
2823                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
2824                 }
2825                 return $data;
2826         }
2827
2828         /**
2829          * Get the rendered text for previewing.
2830          * @return string
2831          */
2832         function getPreviewText() {
2833                 global $wgOut, $wgUser, $wgParser, $wgRawHtml, $wgLang;
2834
2835                 wfProfileIn( __METHOD__ );
2836
2837                 if ( $wgRawHtml && !$this->mTokenOk ) {
2838                         // Could be an offsite preview attempt. This is very unsafe if
2839                         // HTML is enabled, as it could be an attack.
2840                         $parsedNote = '';
2841                         if ( $this->textbox1 !== '' ) {
2842                                 // Do not put big scary notice, if previewing the empty
2843                                 // string, which happens when you initially edit
2844                                 // a category page, due to automatic preview-on-open.
2845                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
2846                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
2847                         }
2848                         wfProfileOut( __METHOD__ );
2849                         return $parsedNote;
2850                 }
2851
2852                 $note = '';
2853
2854                 try {
2855                         $content = $this->toEditContent( $this->textbox1 );
2856
2857                         if ( $this->mTriedSave && !$this->mTokenOk ) {
2858                                 if ( $this->mTokenOkExceptSuffix ) {
2859                                         $note = wfMessage( 'token_suffix_mismatch' )->plain() ;
2860
2861                                 } else {
2862                                         $note = wfMessage( 'session_fail_preview' )->plain() ;
2863                                 }
2864                         } elseif ( $this->incompleteForm ) {
2865                                 $note = wfMessage( 'edit_form_incomplete' )->plain() ;
2866                         } else {
2867                                 $note = wfMessage( 'previewnote' )->plain() .
2868                                         ' [[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' . wfMessage( 'continue-editing' )->text() . ']]';
2869                         }
2870
2871                         $parserOptions = $this->mArticle->makeParserOptions( $this->mArticle->getContext() );
2872                         $parserOptions->setEditSection( false );
2873                         $parserOptions->setIsPreview( true );
2874                         $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
2875
2876                         # don't parse non-wikitext pages, show message about preview
2877                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
2878                                 if( $this->mTitle->isCssJsSubpage() ) {
2879                                         $level = 'user';
2880                                 } elseif( $this->mTitle->isCssOrJsPage() ) {
2881                                         $level = 'site';
2882                                 } else {
2883                                         $level = false;
2884                                 }
2885
2886                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
2887                                         $format = 'css';
2888                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
2889                                         $format = 'js';
2890                                 } else {
2891                                         $format = false;
2892                                 }
2893
2894                                 # Used messages to make sure grep find them:
2895                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
2896                                 if( $level && $format ) {
2897                                         $note = "<div id='mw-{$level}{$format}preview'>" . wfMessage( "{$level}{$format}preview" )->text()  . "</div>";
2898                                 } else {
2899                                         $note = wfMessage( 'previewnote' )->text() ;
2900                                 }
2901                         } else {
2902                                 $note = wfMessage( 'previewnote' )->text() ;
2903                         }
2904
2905                         $rt = $content->getRedirectChain();
2906                         if ( $rt ) {
2907                                 $previewHTML = $this->mArticle->viewRedirect( $rt, false );
2908                         } else {
2909
2910                                 # If we're adding a comment, we need to show the
2911                                 # summary as the headline
2912                                 if ( $this->section === "new" && $this->summary !== "" ) {
2913                                         $content = $content->addSectionHeader( $this->summary );
2914                                 }
2915
2916                                 $hook_args = array( $this, &$content );
2917                                 ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
2918                                 wfRunHooks( 'EditPageGetPreviewContent', $hook_args );
2919
2920                                 $parserOptions->enableLimitReport();
2921
2922                                 # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
2923                                 # But it's now deprecated, so never mind
2924
2925                                 $content = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
2926                                 $parserOutput = $content->getParserOutput( $this->getArticle()->getTitle(), null, $parserOptions );
2927
2928                                 $previewHTML = $parserOutput->getText();
2929                                 $this->mParserOutput = $parserOutput;
2930                                 $wgOut->addParserOutputNoText( $parserOutput );
2931
2932                                 if ( count( $parserOutput->getWarnings() ) ) {
2933                                         $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
2934                                 }
2935                         }
2936                 } catch ( MWContentSerializationException $ex ) {
2937                         $m = wfMessage('content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
2938                         $note .= "\n\n" . $m->parse();
2939                         $previewHTML = '';
2940                 }
2941
2942                 if ( $this->isConflict ) {
2943                         $conflict = '<h2 id="mw-previewconflict">' . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
2944                 } else {
2945                         $conflict = '<hr />';
2946                 }
2947
2948                 $previewhead = "<div class='previewnote'>\n" .
2949                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
2950                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
2951
2952                 $pageLang = $this->mTitle->getPageLanguage();
2953                 $attribs = array( 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
2954                         'class' => 'mw-content-' . $pageLang->getDir() );
2955                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
2956
2957                 wfProfileOut( __METHOD__ );
2958                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
2959         }
2960
2961         /**
2962          * @return Array
2963          */
2964         function getTemplates() {
2965                 if ( $this->preview || $this->section != '' ) {
2966                         $templates = array();
2967                         if ( !isset( $this->mParserOutput ) ) {
2968                                 return $templates;
2969                         }
2970                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
2971                                 foreach ( array_keys( $template ) as $dbk ) {
2972                                         $templates[] = Title::makeTitle( $ns, $dbk );
2973                                 }
2974                         }
2975                         return $templates;
2976                 } else {
2977                         return $this->mTitle->getTemplateLinksFrom();
2978                 }
2979         }
2980
2981         /**
2982          * Shows a bulletin board style toolbar for common editing functions.
2983          * It can be disabled in the user preferences.
2984          * The necessary JavaScript code can be found in skins/common/edit.js.
2985          *
2986          * @return string
2987          */
2988         static function getEditToolbar() {
2989                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
2990                 global $wgUseTeX, $wgEnableUploads, $wgForeignFileRepos;
2991
2992                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
2993
2994                 /**
2995                  * $toolarray is an array of arrays each of which includes the
2996                  * filename of the button image (without path), the opening
2997                  * tag, the closing tag, optionally a sample text that is
2998                  * inserted between the two when no selection is highlighted
2999                  * and.  The tip text is shown when the user moves the mouse
3000                  * over the button.
3001                  *
3002                  * Also here: accesskeys (key), which are not used yet until
3003                  * someone can figure out a way to make them work in
3004                  * IE. However, we should make sure these keys are not defined
3005                  * on the edit page.
3006                  */
3007                 $toolarray = array(
3008                         array(
3009                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
3010                                 'id'     => 'mw-editbutton-bold',
3011                                 'open'   => '\'\'\'',
3012                                 'close'  => '\'\'\'',
3013                                 'sample' => wfMessage( 'bold_sample' )->text(),
3014                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3015                                 'key'    => 'B'
3016                         ),
3017                         array(
3018                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
3019                                 'id'     => 'mw-editbutton-italic',
3020                                 'open'   => '\'\'',
3021                                 'close'  => '\'\'',
3022                                 'sample' => wfMessage( 'italic_sample' )->text(),
3023                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3024                                 'key'    => 'I'
3025                         ),
3026                         array(
3027                                 'image'  => $wgLang->getImageFile( 'button-link' ),
3028                                 'id'     => 'mw-editbutton-link',
3029                                 'open'   => '[[',
3030                                 'close'  => ']]',
3031                                 'sample' => wfMessage( 'link_sample' )->text(),
3032                                 'tip'    => wfMessage( 'link_tip' )->text(),
3033                                 'key'    => 'L'
3034                         ),
3035                         array(
3036                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
3037                                 'id'     => 'mw-editbutton-extlink',
3038                                 'open'   => '[',
3039                                 'close'  => ']',
3040                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3041                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3042                                 'key'    => 'X'
3043                         ),
3044                         array(
3045                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
3046                                 'id'     => 'mw-editbutton-headline',
3047                                 'open'   => "\n== ",
3048                                 'close'  => " ==\n",
3049                                 'sample' => wfMessage( 'headline_sample' )->text(),
3050                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3051                                 'key'    => 'H'
3052                         ),
3053                         $imagesAvailable ? array(
3054                                 'image'  => $wgLang->getImageFile( 'button-image' ),
3055                                 'id'     => 'mw-editbutton-image',
3056                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3057                                 'close'  => ']]',
3058                                 'sample' => wfMessage( 'image_sample' )->text(),
3059                                 'tip'    => wfMessage( 'image_tip' )->text(),
3060                                 'key'    => 'D',
3061                         ) : false,
3062                         $imagesAvailable ? array(
3063                                 'image'  => $wgLang->getImageFile( 'button-media' ),
3064                                 'id'     => 'mw-editbutton-media',
3065                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3066                                 'close'  => ']]',
3067                                 'sample' => wfMessage( 'media_sample' )->text(),
3068                                 'tip'    => wfMessage( 'media_tip' )->text(),
3069                                 'key'    => 'M'
3070                         ) : false,
3071                         $wgUseTeX ? array(
3072                                 'image'  => $wgLang->getImageFile( 'button-math' ),
3073                                 'id'     => 'mw-editbutton-math',
3074                                 'open'   => "<math>",
3075                                 'close'  => "</math>",
3076                                 'sample' => wfMessage( 'math_sample' )->text(),
3077                                 'tip'    => wfMessage( 'math_tip' )->text(),
3078                                 'key'    => 'C'
3079                         ) : false,
3080                         array(
3081                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
3082                                 'id'     => 'mw-editbutton-nowiki',
3083                                 'open'   => "<nowiki>",
3084                                 'close'  => "</nowiki>",
3085                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3086                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3087                                 'key'    => 'N'
3088                         ),
3089                         array(
3090                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
3091                                 'id'     => 'mw-editbutton-signature',
3092                                 'open'   => '--~~~~',
3093                                 'close'  => '',
3094                                 'sample' => '',
3095                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3096                                 'key'    => 'Y'
3097                         ),
3098                         array(
3099                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
3100                                 'id'     => 'mw-editbutton-hr',
3101                                 'open'   => "\n----\n",
3102                                 'close'  => '',
3103                                 'sample' => '',
3104                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3105                                 'key'    => 'R'
3106                         )
3107                 );
3108
3109                 $script = 'mw.loader.using("mediawiki.action.edit", function() {';
3110                 foreach ( $toolarray as $tool ) {
3111                         if ( !$tool ) {
3112                                 continue;
3113                         }
3114
3115                         $params = array(
3116                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
3117                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3118                                 // Older browsers show a "speedtip" type message only for ALT.
3119                                 // Ideally these should be different, realistically they
3120                                 // probably don't need to be.
3121                                 $tip = $tool['tip'],
3122                                 $open = $tool['open'],
3123                                 $close = $tool['close'],
3124                                 $sample = $tool['sample'],
3125                                 $cssId = $tool['id'],
3126                         );
3127
3128                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
3129                 }
3130
3131                 // This used to be called on DOMReady from mediawiki.action.edit, which
3132                 // ended up causing race conditions with the setup code above.
3133                 $script .= "\n" .
3134                         "// Create button bar\n" .
3135                         "$(function() { mw.toolbar.init(); } );\n";
3136
3137                 $script .= '});';
3138                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3139
3140                 $toolbar = '<div id="toolbar"></div>';
3141
3142                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3143
3144                 return $toolbar;
3145         }
3146
3147         /**
3148          * Returns an array of html code of the following checkboxes:
3149          * minor and watch
3150          *
3151          * @param $tabindex int Current tabindex
3152          * @param $checked Array of checkbox => bool, where bool indicates the checked
3153          *                 status of the checkbox
3154          *
3155          * @return array
3156          */
3157         public function getCheckboxes( &$tabindex, $checked ) {
3158                 global $wgUser;
3159
3160                 $checkboxes = array();
3161
3162                 // don't show the minor edit checkbox if it's a new page or section
3163                 if ( !$this->isNew ) {
3164                         $checkboxes['minor'] = '';
3165                         $minorLabel = wfMessage( 'minoredit' )->parse();
3166                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3167                                 $attribs = array(
3168                                         'tabindex'  => ++$tabindex,
3169                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3170                                         'id'        => 'wpMinoredit',
3171                                 );
3172                                 $checkboxes['minor'] =
3173                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3174                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3175                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3176                                         ">{$minorLabel}</label>";
3177                         }
3178                 }
3179
3180                 $watchLabel = wfMessage( 'watchthis' )->parse();
3181                 $checkboxes['watch'] = '';
3182                 if ( $wgUser->isLoggedIn() ) {
3183                         $attribs = array(
3184                                 'tabindex'  => ++$tabindex,
3185                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3186                                 'id'        => 'wpWatchthis',
3187                         );
3188                         $checkboxes['watch'] =
3189                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3190                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3191                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3192                                 ">{$watchLabel}</label>";
3193                 }
3194                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3195                 return $checkboxes;
3196         }
3197
3198         /**
3199          * Returns an array of html code of the following buttons:
3200          * save, diff, preview and live
3201          *
3202          * @param $tabindex int Current tabindex
3203          *
3204          * @return array
3205          */
3206         public function getEditButtons( &$tabindex ) {
3207                 $buttons = array();
3208
3209                 $temp = array(
3210                         'id'        => 'wpSave',
3211                         'name'      => 'wpSave',
3212                         'type'      => 'submit',
3213                         'tabindex'  => ++$tabindex,
3214                         'value'     => wfMessage( 'savearticle' )->text(),
3215                         'accesskey' => wfMessage( 'accesskey-save' )->text(),
3216                         'title'     => wfMessage( 'tooltip-save' )->text() . ' [' . wfMessage( 'accesskey-save' )->text() . ']',
3217                 );
3218                 $buttons['save'] = Xml::element( 'input', $temp, '' );
3219
3220                 ++$tabindex; // use the same for preview and live preview
3221                 $temp = array(
3222                         'id'        => 'wpPreview',
3223                         'name'      => 'wpPreview',
3224                         'type'      => 'submit',
3225                         'tabindex'  => $tabindex,
3226                         'value'     => wfMessage( 'showpreview' )->text(),
3227                         'accesskey' => wfMessage( 'accesskey-preview' )->text(),
3228                         'title'     => wfMessage( 'tooltip-preview' )->text() . ' [' . wfMessage( 'accesskey-preview' )->text() . ']',
3229                 );
3230                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
3231                 $buttons['live'] = '';
3232
3233                 $temp = array(
3234                         'id'        => 'wpDiff',
3235                         'name'      => 'wpDiff',
3236                         'type'      => 'submit',
3237                         'tabindex'  => ++$tabindex,
3238                         'value'     => wfMessage( 'showdiff' )->text(),
3239                         'accesskey' => wfMessage( 'accesskey-diff' )->text(),
3240                         'title'     => wfMessage( 'tooltip-diff' )->text() . ' [' . wfMessage( 'accesskey-diff' )->text() . ']',
3241                 );
3242                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
3243
3244                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3245                 return $buttons;
3246         }
3247
3248         /**
3249          * Output preview text only. This can be sucked into the edit page
3250          * via JavaScript, and saves the server time rendering the skin as
3251          * well as theoretically being more robust on the client (doesn't
3252          * disturb the edit box's undo history, won't eat your text on
3253          * failure, etc).
3254          *
3255          * @todo This doesn't include category or interlanguage links.
3256          *       Would need to enhance it a bit, "<s>maybe wrap them in XML
3257          *       or something...</s>" that might also require more skin
3258          *       initialization, so check whether that's a problem.
3259          */
3260         function livePreview() {
3261                 global $wgOut;
3262                 $wgOut->disable();
3263                 header( 'Content-type: text/xml; charset=utf-8' );
3264                 header( 'Cache-control: no-cache' );
3265
3266                 $previewText = $this->getPreviewText();
3267                 #$categories = $skin->getCategoryLinks();
3268
3269                 $s =
3270                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3271                 Xml::tags( 'livepreview', null,
3272                         Xml::element( 'preview', null, $previewText )
3273                         #.      Xml::element( 'category', null, $categories )
3274                 );
3275                 echo $s;
3276         }
3277
3278         /**
3279          * Call the stock "user is blocked" page
3280          *
3281          * @deprecated in 1.19; throw an exception directly instead
3282          */
3283         function blockedPage() {
3284                 wfDeprecated( __METHOD__, '1.19' );
3285                 global $wgUser;
3286
3287                 throw new UserBlockedError( $wgUser->getBlock() );
3288         }
3289
3290         /**
3291          * Produce the stock "please login to edit pages" page
3292          *
3293          * @deprecated in 1.19; throw an exception directly instead
3294          */
3295         function userNotLoggedInPage() {
3296                 wfDeprecated( __METHOD__, '1.19' );
3297                 throw new PermissionsError( 'edit' );
3298         }
3299
3300         /**
3301          * Show an error page saying to the user that he has insufficient permissions
3302          * to create a new page
3303          *
3304          * @deprecated in 1.19; throw an exception directly instead
3305          */
3306         function noCreatePermission() {
3307                 wfDeprecated( __METHOD__, '1.19' );
3308                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
3309                 throw new PermissionsError( $permission );
3310         }
3311
3312         /**
3313          * Creates a basic error page which informs the user that
3314          * they have attempted to edit a nonexistent section.
3315          */
3316         function noSuchSectionPage() {
3317                 global $wgOut;
3318
3319                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3320
3321                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
3322                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
3323                 $wgOut->addHTML( $res );
3324
3325                 $wgOut->returnToMain( false, $this->mTitle );
3326         }
3327
3328         /**
3329          * Produce the stock "your edit contains spam" page
3330          *
3331          * @param $match string Text which triggered one or more filters
3332          * @deprecated since 1.17 Use method spamPageWithContent() instead
3333          */
3334         static function spamPage( $match = false ) {
3335                 wfDeprecated( __METHOD__, '1.17' );
3336
3337                 global $wgOut, $wgTitle;
3338
3339                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3340
3341                 $wgOut->addHTML( '<div id="spamprotected">' );
3342                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3343                 if ( $match ) {
3344                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3345                 }
3346                 $wgOut->addHTML( '</div>' );
3347
3348                 $wgOut->returnToMain( false, $wgTitle );
3349         }
3350
3351         /**
3352          * Show "your edit contains spam" page with your diff and text
3353          *
3354          * @param $match string|Array|bool Text (or array of texts) which triggered one or more filters
3355          */
3356         public function spamPageWithContent( $match = false ) {
3357                 global $wgOut, $wgLang;
3358                 $this->textbox2 = $this->textbox1;
3359
3360                 if( is_array( $match ) ){
3361                         $match = $wgLang->listToText( $match );
3362                 }
3363                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3364
3365                 $wgOut->addHTML( '<div id="spamprotected">' );
3366                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3367                 if ( $match ) {
3368                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3369                 }
3370                 $wgOut->addHTML( '</div>' );
3371
3372                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3373                 $this->showDiff();
3374
3375                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3376                 $this->showTextbox2();
3377
3378                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3379         }
3380
3381         /**
3382          * Format an anchor fragment as it would appear for a given section name
3383          * @param $text String
3384          * @return String
3385          * @private
3386          */
3387         function sectionAnchor( $text ) {
3388                 global $wgParser;
3389                 return $wgParser->guessSectionNameFromWikiText( $text );
3390         }
3391
3392         /**
3393          * Check if the browser is on a blacklist of user-agents known to
3394          * mangle UTF-8 data on form submission. Returns true if Unicode
3395          * should make it through, false if it's known to be a problem.
3396          * @return bool
3397          * @private
3398          */
3399         function checkUnicodeCompliantBrowser() {
3400                 global $wgBrowserBlackList, $wgRequest;
3401
3402                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
3403                 if ( $currentbrowser === false ) {
3404                         // No User-Agent header sent? Trust it by default...
3405                         return true;
3406                 }
3407
3408                 foreach ( $wgBrowserBlackList as $browser ) {
3409                         if ( preg_match( $browser, $currentbrowser ) ) {
3410                                 return false;
3411                         }
3412                 }
3413                 return true;
3414         }
3415
3416         /**
3417          * Filter an input field through a Unicode de-armoring process if it
3418          * came from an old browser with known broken Unicode editing issues.
3419          *
3420          * @param $request WebRequest
3421          * @param $field String
3422          * @return String
3423          * @private
3424          */
3425         function safeUnicodeInput( $request, $field ) {
3426                 $text = rtrim( $request->getText( $field ) );
3427                 return $request->getBool( 'safemode' )
3428                         ? $this->unmakesafe( $text )
3429                         : $text;
3430         }
3431
3432         /**
3433          * @param $request WebRequest
3434          * @param $text string
3435          * @return string
3436          */
3437         function safeUnicodeText( $request, $text ) {
3438                 $text = rtrim( $text );
3439                 return $request->getBool( 'safemode' )
3440                         ? $this->unmakesafe( $text )
3441                         : $text;
3442         }
3443
3444         /**
3445          * Filter an output field through a Unicode armoring process if it is
3446          * going to an old browser with known broken Unicode editing issues.
3447          *
3448          * @param $text String
3449          * @return String
3450          * @private
3451          */
3452         function safeUnicodeOutput( $text ) {
3453                 global $wgContLang;
3454                 $codedText = $wgContLang->recodeForEdit( $text );
3455                 return $this->checkUnicodeCompliantBrowser()
3456                         ? $codedText
3457                         : $this->makesafe( $codedText );
3458         }
3459
3460         /**
3461          * A number of web browsers are known to corrupt non-ASCII characters
3462          * in a UTF-8 text editing environment. To protect against this,
3463          * detected browsers will be served an armored version of the text,
3464          * with non-ASCII chars converted to numeric HTML character references.
3465          *
3466          * Preexisting such character references will have a 0 added to them
3467          * to ensure that round-trips do not alter the original data.
3468          *
3469          * @param $invalue String
3470          * @return String
3471          * @private
3472          */
3473         function makesafe( $invalue ) {
3474                 // Armor existing references for reversability.
3475                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
3476
3477                 $bytesleft = 0;
3478                 $result = "";
3479                 $working = 0;
3480                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3481                         $bytevalue = ord( $invalue[$i] );
3482                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
3483                                 $result .= chr( $bytevalue );
3484                                 $bytesleft = 0;
3485                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
3486                                 $working = $working << 6;
3487                                 $working += ( $bytevalue & 0x3F );
3488                                 $bytesleft--;
3489                                 if ( $bytesleft <= 0 ) {
3490                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3491                                 }
3492                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
3493                                 $working = $bytevalue & 0x1F;
3494                                 $bytesleft = 1;
3495                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
3496                                 $working = $bytevalue & 0x0F;
3497                                 $bytesleft = 2;
3498                         } else { // 1111 0xxx
3499                                 $working = $bytevalue & 0x07;
3500                                 $bytesleft = 3;
3501                         }
3502                 }
3503                 return $result;
3504         }
3505
3506         /**
3507          * Reverse the previously applied transliteration of non-ASCII characters
3508          * back to UTF-8. Used to protect data from corruption by broken web browsers
3509          * as listed in $wgBrowserBlackList.
3510          *
3511          * @param $invalue String
3512          * @return String
3513          * @private
3514          */
3515         function unmakesafe( $invalue ) {
3516                 $result = "";
3517                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3518                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
3519                                 $i += 3;
3520                                 $hexstring = "";
3521                                 do {
3522                                         $hexstring .= $invalue[$i];
3523                                         $i++;
3524                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
3525
3526                                 // Do some sanity checks. These aren't needed for reversability,
3527                                 // but should help keep the breakage down if the editor
3528                                 // breaks one of the entities whilst editing.
3529                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) and ( strlen( $hexstring ) <= 6 ) ) {
3530                                         $codepoint = hexdec( $hexstring );
3531                                         $result .= codepointToUtf8( $codepoint );
3532                                 } else {
3533                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
3534                                 }
3535                         } else {
3536                                 $result .= substr( $invalue, $i, 1 );
3537                         }
3538                 }
3539                 // reverse the transform that we made for reversability reasons.
3540                 return strtr( $result, array( "&#x0" => "&#x" ) );
3541         }
3542 }