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          * @throws PermissionsError
 460          */
 461         protected function displayPermissionsError( array $permErrors ) {
 462                 global $wgRequest, $wgOut;
 463
 464                 if ( $wgRequest->getBool( 'redlink' ) ) {
 465                         // The edit page was reached via a red link.
 466                         // Redirect to the article page and let them click the edit tab if
 467                         // they really want a permission error.
 468                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 469                         return;
 470                 }
 471
 472                 $content = $this->getContentObject();
 473
 474                 # Use the normal message if there's nothing to display
 475                 if ( $this->firsttime && $content->isEmpty() ) {
 476                         $action = $this->mTitle->exists() ? 'edit' :
 477                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 478                         throw new PermissionsError( $action, $permErrors );
 479                 }
 480
 481                 $wgOut->setPageTitle( wfMessage( 'viewsource-title', $this->getContextTitle()->getPrefixedText() ) );
 482                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 483                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 484                 $wgOut->addHTML( "<hr />\n" );
 485
 486                 # If the user made changes, preserve them when showing the markup
 487                 # (This happens when a user is blocked during edit, for instance)
 488                 if ( !$this->firsttime ) {
 489                         $text = $this->textbox1;
 490                         $wgOut->addWikiMsg( 'viewyourtext' );
 491                 } else {
 492                         $text = $this->toEditText( $content );
 493                         $wgOut->addWikiMsg( 'viewsourcetext' );
 494                 }
 495
 496                 $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 497
 498                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 499                         Linker::formatTemplates( $this->getTemplates() ) ) );
 500
 501                 if ( $this->mTitle->exists() ) {
 502                         $wgOut->returnToMain( null, $this->mTitle );
 503                 }
 504         }
 505
 506         /**
 507          * Show a read-only error
 508          * Parameters are the same as OutputPage:readOnlyPage()
 509          * Redirect to the article page if redlink=1
 510          * @deprecated in 1.19; use displayPermissionsError() instead
 511          */
 512         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 513                 wfDeprecated( __METHOD__, '1.19' );
 514
 515                 global $wgRequest, $wgOut;
 516                 if ( $wgRequest->getBool( 'redlink' ) ) {
 517                         // The edit page was reached via a red link.
 518                         // Redirect to the article page and let them click the edit tab if
 519                         // they really want a permission error.
 520                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 521                 } else {
 522                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 523                 }
 524         }
 525
 526         /**
 527          * Should we show a preview when the edit form is first shown?
 528          *
 529          * @return bool
 530          */
 531         protected function previewOnOpen() {
 532                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 533                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 534                         // Explicit override from request
 535                         return true;
 536                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 537                         // Explicit override from request
 538                         return false;
 539                 } elseif ( $this->section == 'new' ) {
 540                         // Nothing *to* preview for new sections
 541                         return false;
 542                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 543                         // Standard preference behaviour
 544                         return true;
 545                 } elseif ( !$this->mTitle->exists() &&
 546                   isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] ) &&
 547                   $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 548                 {
 549                         // Categories are special
 550                         return true;
 551                 } else {
 552                         return false;
 553                 }
 554         }
 555
 556         /**
 557          * Checks whether the user entered a skin name in uppercase,
 558          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 559          *
 560          * @return bool
 561          */
 562         protected function isWrongCaseCssJsPage() {
 563                 if ( $this->mTitle->isCssJsSubpage() ) {
 564                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 565                         $skins = array_merge(
 566                                 array_keys( Skin::getSkinNames() ),
 567                                 array( 'common' )
 568                         );
 569                         return !in_array( $name, $skins )
 570                                 && in_array( strtolower( $name ), $skins );
 571                 } else {
 572                         return false;
 573                 }
 574         }
 575
 576         /**
 577          * Does this EditPage class support section editing?
 578          * This is used by EditPage subclasses to indicate their ui cannot handle section edits
 579          *
 580          * @return bool
 581          */
 582         protected function isSectionEditSupported() {
 583                 return true;
 584         }
 585
 586         /**
 587          * This function collects the form data and uses it to populate various member variables.
 588          * @param $request WebRequest
 589          */
 590         function importFormData( &$request ) {
 591                 global $wgLang, $wgUser;
 592
 593                 wfProfileIn( __METHOD__ );
 594
 595                 # Section edit can come from either the form or a link
 596                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 597
 598                 if ( $request->wasPosted() ) {
 599                         # These fields need to be checked for encoding.
 600                         # Also remove trailing whitespace, but don't remove _initial_
 601                         # whitespace from the text boxes. This may be significant formatting.
 602                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 603                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 604                                 // Skip this if wpTextbox2 has input, it indicates that we came
 605                                 // from a conflict page with raw page text, not a custom form
 606                                 // modified by subclasses
 607                                 wfProfileIn( get_class( $this ) . "::importContentFormData" );
 608                                 $textbox1 = $this->importContentFormData( $request );
 609                                 if ( isset( $textbox1 ) )
 610                                         $this->textbox1 = $textbox1;
 611                                 wfProfileOut( get_class( $this ) . "::importContentFormData" );
 612                         }
 613
 614                         # Truncate for whole multibyte characters
 615                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary' ), 255 );
 616
 617                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 618                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 619                         # section titles.
 620                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 621
 622                         # Treat sectiontitle the same way as summary.
 623                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 624                         # currently doing double duty as both edit summary and section title. Right now this
 625                         # is just to allow API edits to work around this limitation, but this should be
 626                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 627                         $this->sectiontitle = $wgLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 628                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 629
 630                         $this->edittime = $request->getVal( 'wpEdittime' );
 631                         $this->starttime = $request->getVal( 'wpStarttime' );
 632
 633                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 634
 635                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 636                                 // wpTextbox1 field is missing, possibly due to being "too big"
 637                                 // according to some filter rules such as Suhosin's setting for
 638                                 // suhosin.request.max_value_length (d'oh)
 639                                 $this->incompleteForm = true;
 640                         } else {
 641                                 // edittime should be one of our last fields; if it's missing,
 642                                 // the submission probably broke somewhere in the middle.
 643                                 $this->incompleteForm = is_null( $this->edittime );
 644                         }
 645                         if ( $this->incompleteForm ) {
 646                                 # If the form is incomplete, force to preview.
 647                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 648                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 649                                 $this->preview = true;
 650                         } else {
 651                                 /* Fallback for live preview */
 652                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 653                                 $this->diff = $request->getCheck( 'wpDiff' );
 654
 655                                 // Remember whether a save was requested, so we can indicate
 656                                 // if we forced preview due to session failure.
 657                                 $this->mTriedSave = !$this->preview;
 658
 659                                 if ( $this->tokenOk( $request ) ) {
 660                                         # Some browsers will not report any submit button
 661                                         # if the user hits enter in the comment box.
 662                                         # The unmarked state will be assumed to be a save,
 663                                         # if the form seems otherwise complete.
 664                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 665                                 } elseif ( $this->diff ) {
 666                                         # Failed token check, but only requested "Show Changes".
 667                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 668                                 } else {
 669                                         # Page might be a hack attempt posted from
 670                                         # an external site. Preview instead of saving.
 671                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 672                                         $this->preview = true;
 673                                 }
 674                         }
 675                         $this->save = !$this->preview && !$this->diff;
 676                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 677                                 $this->edittime = null;
 678                         }
 679
 680                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 681                                 $this->starttime = null;
 682                         }
 683
 684                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 685
 686                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 687                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 688
 689                         # Don't force edit summaries when a user is editing their own user or talk page
 690                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 691                                 $this->mTitle->getText() == $wgUser->getName() )
 692                         {
 693                                 $this->allowBlankSummary = true;
 694                         } else {
 695                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary' );
 696                         }
 697
 698                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 699                 } else {
 700                         # Not a posted form? Start with nothing.
 701                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 702                         $this->textbox1     = '';
 703                         $this->summary      = '';
 704                         $this->sectiontitle = '';
 705                         $this->edittime     = '';
 706                         $this->starttime    = wfTimestampNow();
 707                         $this->edit         = false;
 708                         $this->preview      = false;
 709                         $this->save         = false;
 710                         $this->diff         = false;
 711                         $this->minoredit    = false;
 712                         $this->watchthis    = $request->getBool( 'watchthis', false ); // Watch may be overriden by request parameters
 713                         $this->recreate     = false;
 714
 715                         // When creating a new section, we can preload a section title by passing it as the
 716                         // preloadtitle parameter in the URL (Bug 13100)
 717                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 718                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 719                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 720                                 $this->summary = $request->getVal( 'preloadtitle' );
 721                         }
 722                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 723                                 $this->summary = $request->getText( 'summary' );
 724                                 if ( $this->summary !== '' ) {
 725                                         $this->hasPresetSummary = true;
 726                                 }
 727                         }
 728
 729                         if ( $request->getVal( 'minor' ) ) {
 730                                 $this->minoredit = true;
 731                         }
 732                 }
 733
 734                 $this->oldid = $request->getInt( 'oldid' );
 735
 736                 $this->bot = $request->getBool( 'bot', true );
 737                 $this->nosummary = $request->getBool( 'nosummary' );
 738
 739                 $content_handler = ContentHandler::getForTitle( $this->mTitle );
 740                 $this->contentModel = $request->getText( 'model', $content_handler->getModelID() ); #may be overridden by revision
 741                 $this->contentFormat = $request->getText( 'format', $content_handler->getDefaultFormat() ); #may be overridden by revision
 742
 743                 #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
 744                 #TODO: check if the desired content model supports the given content format!
 745
 746                 $this->live = $request->getCheck( 'live' );
 747                 $this->editintro = $request->getText( 'editintro',
 748                         // Custom edit intro for new sections
 749                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 750
 751                 // Allow extensions to modify form data
 752                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 753
 754                 wfProfileOut( __METHOD__ );
 755         }
 756
 757         /**
 758          * Subpage overridable method for extracting the page content data from the
 759          * posted form to be placed in $this->textbox1, if using customized input
 760          * this method should be overrided and return the page text that will be used
 761          * for saving, preview parsing and so on...
 762          *
 763          * @param $request WebRequest
 764          */
 765         protected function importContentFormData( &$request ) {
 766                 return; // Don't do anything, EditPage already extracted wpTextbox1
 767         }
 768
 769         /**
 770          * Initialise form fields in the object
 771          * Called on the first invocation, e.g. when a user clicks an edit link
 772          * @return bool -- if the requested section is valid
 773          */
 774         function initialiseForm() {
 775                 global $wgUser;
 776                 $this->edittime = $this->mArticle->getTimestamp();
 777
 778                 $content = $this->getContentObject( false ); #TODO: track content object?!
 779                 $this->textbox1 = $this->toEditText( $content );
 780
 781                 // activate checkboxes if user wants them to be always active
 782                 # Sort out the "watch" checkbox
 783                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 784                         # Watch all edits
 785                         $this->watchthis = true;
 786                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 787                         # Watch creations
 788                         $this->watchthis = true;
 789                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
 790                         # Already watched
 791                         $this->watchthis = true;
 792                 }
 793                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 794                         $this->minoredit = true;
 795                 }
 796                 if ( $this->textbox1 === false ) {
 797                         return false;
 798                 }
 799                 wfProxyCheck();
 800                 return true;
 801         }
 802
 803         /**
 804          * Fetch initial editing page content.
 805          *
 806          * @param $def_text string
 807          * @return mixed string on success, $def_text for invalid sections
 808          * @private
 809          * @deprecated since 1.21
 810          */
 811         function getContent( $def_text = false ) {
 812                 wfDeprecated( __METHOD__, '1.21' );
 813
 814                 if ( $def_text !== null && $def_text !== false && $def_text !== '' ) {
 815                         $def_content = $this->toEditContent( $def_text );
 816                 } else {
 817                         $def_content = false;
 818                 }
 819
 820                 $content = $this->getContentObject( $def_content );
 821
 822                 // Note: EditPage should only be used with text based content anyway.
 823                 return $this->toEditText( $content );
 824         }
 825
 826         /**
 827          * @param Content|false $def_content The default value to return
 828          *
 829          * @return mixed Content on success, $def_content for invalid sections
 830          *
 831          * @since 1.21
 832          */
 833         protected function getContentObject( $def_content = null ) {
 834                 global $wgOut, $wgRequest;
 835
 836                 wfProfileIn( __METHOD__ );
 837
 838                 $content = false;
 839
 840                 // For message page not locally set, use the i18n message.
 841                 // For other non-existent articles, use preload text if any.
 842                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
 843                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
 844                                 # If this is a system message, get the default text.
 845                                 $msg = $this->mTitle->getDefaultMessageText();
 846
 847                                 $content = $this->toEditContent( $msg );
 848                         }
 849                         if ( $content === false ) {
 850                                 # If requested, preload some text.
 851                                 $preload = $wgRequest->getVal( 'preload',
 852                                         // Custom preload text for new sections
 853                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 854
 855                                 $content = $this->getPreloadedContent( $preload );
 856                         }
 857                 // For existing pages, get text based on "undo" or section parameters.
 858                 } else {
 859                         if ( $this->section != '' ) {
 860                                 // Get section edit text (returns $def_text for invalid sections)
 861                                 $orig = $this->getOriginalContent();
 862                                 $content = $orig ? $orig->getSection( $this->section ) : null;
 863
 864                                 if ( !$content ) $content = $def_content;
 865                         } else {
 866                                 $undoafter = $wgRequest->getInt( 'undoafter' );
 867                                 $undo = $wgRequest->getInt( 'undo' );
 868
 869                                 if ( $undo > 0 && $undoafter > 0 ) {
 870                                         if ( $undo < $undoafter ) {
 871                                                 # If they got undoafter and undo round the wrong way, switch them
 872                                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 873                                         }
 874
 875                                         $undorev = Revision::newFromId( $undo );
 876                                         $oldrev = Revision::newFromId( $undoafter );
 877
 878                                         # Sanity check, make sure it's the right page,
 879                                         # the revisions exist and they were not deleted.
 880                                         # Otherwise, $content will be left as-is.
 881                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 882                                                 $undorev->getPage() == $oldrev->getPage() &&
 883                                                 $undorev->getPage() == $this->mTitle->getArticleID() &&
 884                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 885                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 886
 887                                                 $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
 888
 889                                                 if ( $content === false ) {
 890                                                         # Warn the user that something went wrong
 891                                                         $undoMsg = 'failure';
 892                                                 } else {
 893                                                         # Inform the user of our success and set an automatic edit summary
 894                                                         $undoMsg = 'success';
 895
 896                                                         # If we just undid one rev, use an autosummary
 897                                                         $firstrev = $oldrev->getNext();
 898                                                         if ( $firstrev && $firstrev->getId() == $undo ) {
 899                                                                 $undoSummary = wfMessage( 'undo-summary', $undo, $undorev->getUserText() )->inContentLanguage()->text();
 900                                                                 if ( $this->summary === '' ) {
 901                                                                         $this->summary = $undoSummary;
 902                                                                 } else {
 903                                                                         $this->summary = $undoSummary . wfMessage( 'colon-separator' )
 904                                                                                 ->inContentLanguage()->text() . $this->summary;
 905                                                                 }
 906                                                                 $this->undidRev = $undo;
 907                                                         }
 908                                                         $this->formtype = 'diff';
 909                                                 }
 910                                         } else {
 911                                                 // Failed basic sanity checks.
 912                                                 // Older revisions may have been removed since the link
 913                                                 // was created, or we may simply have got bogus input.
 914                                                 $undoMsg = 'norev';
 915                                         }
 916
 917                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
 918                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
 919                                                 wfMessage( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
 920                                 }
 921
 922                                 if ( $content === false ) {
 923                                         $content = $this->getOriginalContent();
 924                                 }
 925                         }
 926                 }
 927
 928                 wfProfileOut( __METHOD__ );
 929                 return $content;
 930         }
 931
 932         /**
 933          * Get the content of the wanted revision, without section extraction.
 934          *
 935          * The result of this function can be used to compare user's input with
 936          * section replaced in its context (using WikiPage::replaceSection())
 937          * to the original text of the edit.
 938          *
 939          * This difers from Article::getContent() that when a missing revision is
 940          * encountered the result will be an empty string and not the
 941          * 'missing-revision' message.
 942          *
 943          * @since 1.19
 944          * @return string
 945          */
 946         private function getOriginalContent() {
 947                 if ( $this->section == 'new' ) {
 948                         return $this->getCurrentContent();
 949                 }
 950                 $revision = $this->mArticle->getRevisionFetched();
 951                 if ( $revision === null ) {
 952                         if ( !$this->contentModel ) $this->contentModel = $this->getTitle()->getContentModel();
 953                         $handler = ContentHandler::getForModelID( $this->contentModel );
 954
 955                         return $handler->makeEmptyContent();
 956                 }
 957                 $content = $revision->getContent();
 958                 return $content;
 959         }
 960
 961         /**
 962          * Get the current content of the page. This is basically similar to
 963          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
 964          * content object is returned instead of null.
 965          *
 966          * @since 1.21
 967          * @return Content
 968          */
 969         protected function getCurrentContent() {
 970                 $rev = $this->mArticle->getRevision();
 971                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
 972
 973                 if ( $content  === false || $content === null ) {
 974                         if ( !$this->contentModel ) $this->contentModel = $this->getTitle()->getContentModel();
 975                         $handler = ContentHandler::getForModelID( $this->contentModel );
 976
 977                         return $handler->makeEmptyContent();
 978                 } else {
 979                         # nasty side-effect, but needed for consistency
 980                         $this->contentModel = $rev->getContentModel();
 981                         $this->contentFormat = $rev->getContentFormat();
 982
 983                         return $content;
 984                 }
 985         }
 986
 987
 988         /**
 989          * Use this method before edit() to preload some text into the edit box
 990          *
 991          * @param $text string
 992          * @deprecated since 1.21
 993          */
 994         public function setPreloadedText( $text ) {
 995                 wfDeprecated( __METHOD__, "1.21" );
 996
 997                 $content = $this->toEditContent( $text );
 998
 999                 $this->setPreloadedContent( $content );
1000         }
1001
1002         /**
1003          * Use this method before edit() to preload some content into the edit box
1004          *
1005          * @param $content Content
1006          *
1007          * @since 1.21
1008          */
1009         public function setPreloadedContent( Content $content ) {
1010                 $this->mPreloadedContent = $content;
1011         }
1012
1013         /**
1014          * Get the contents to be preloaded into the box, either set by
1015          * an earlier setPreloadText() or by loading the given page.
1016          *
1017          * @param $preload String: representing the title to preload from.
1018          *
1019          * @return String
1020          *
1021          * @deprecated since 1.21, use getPreloadedContent() instead
1022          */
1023         protected function getPreloadedText( $preload ) {
1024                 wfDeprecated( __METHOD__, "1.21" );
1025
1026                 $content = $this->getPreloadedContent( $preload );
1027                 $text = $this->toEditText( $content );
1028
1029                 return $text;
1030         }
1031
1032         /**
1033          * Get the contents to be preloaded into the box, either set by
1034          * an earlier setPreloadText() or by loading the given page.
1035          *
1036          * @param $preload String: representing the title to preload from.
1037          *
1038          * @return Content
1039          *
1040          * @since 1.21
1041          */
1042         protected function getPreloadedContent( $preload ) {
1043                 global $wgUser;
1044
1045                 if ( !empty( $this->mPreloadContent ) ) {
1046                         return $this->mPreloadContent;
1047                 }
1048
1049                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1050
1051                 if ( $preload === '' ) {
1052                         return $handler->makeEmptyContent();
1053                 }
1054
1055                 $title = Title::newFromText( $preload );
1056                 # Check for existence to avoid getting MediaWiki:Noarticletext
1057                 if ( $title === null || !$title->exists() || !$title->userCan( 'read' ) ) {
1058                         return $handler->makeEmptyContent();
1059                 }
1060
1061                 $page = WikiPage::factory( $title );
1062                 if ( $page->isRedirect() ) {
1063                         $title = $page->getRedirectTarget();
1064                         # Same as before
1065                         if ( $title === null || !$title->exists() || !$title->userCan( 'read' ) ) {
1066                                 return $handler->makeEmptyContent();
1067                         }
1068                         $page = WikiPage::factory( $title );
1069                 }
1070
1071                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1072                 $content = $page->getContent( Revision::RAW );
1073
1074                 return $content->preloadTransform( $title, $parserOptions );
1075         }
1076
1077         /**
1078          * Make sure the form isn't faking a user's credentials.
1079          *
1080          * @param $request WebRequest
1081          * @return bool
1082          * @private
1083          */
1084         function tokenOk( &$request ) {
1085                 global $wgUser;
1086                 $token = $request->getVal( 'wpEditToken' );
1087                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1088                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1089                 return $this->mTokenOk;
1090         }
1091
1092         /**
1093          * Attempt submission
1094          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1095          * @return bool false if output is done, true if the rest of the form should be displayed
1096          */
1097         function attemptSave() {
1098                 global $wgUser, $wgOut;
1099
1100                 $resultDetails = false;
1101                 # Allow bots to exempt some edits from bot flagging
1102                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1103                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1104                 // FIXME: once the interface for internalAttemptSave() is made nicer, this should use the message in $status
1105                 if ( $status->value == self::AS_SUCCESS_UPDATE || $status->value == self::AS_SUCCESS_NEW_ARTICLE ) {
1106                         $this->didSave = true;
1107                 }
1108
1109                 switch ( $status->value ) {
1110                         case self::AS_HOOK_ERROR_EXPECTED:
1111                         case self::AS_CONTENT_TOO_BIG:
1112                         case self::AS_ARTICLE_WAS_DELETED:
1113                         case self::AS_CONFLICT_DETECTED:
1114                         case self::AS_SUMMARY_NEEDED:
1115                         case self::AS_TEXTBOX_EMPTY:
1116                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1117                         case self::AS_END:
1118                                 return true;
1119
1120                         case self::AS_HOOK_ERROR:
1121                                 return false;
1122
1123                         case self::AS_PARSE_ERROR:
1124                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>');
1125                                 return true;
1126
1127                         case self::AS_SUCCESS_NEW_ARTICLE:
1128                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1129                                 $anchor = isset ( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1130                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1131                                 return false;
1132
1133                         case self::AS_SUCCESS_UPDATE:
1134                                 $extraQuery = '';
1135                                 $sectionanchor = $resultDetails['sectionanchor'];
1136
1137                                 // Give extensions a chance to modify URL query on update
1138                                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this->mArticle, &$sectionanchor, &$extraQuery ) );
1139
1140                                 if ( $resultDetails['redirect'] ) {
1141                                         if ( $extraQuery == '' ) {
1142                                                 $extraQuery = 'redirect=no';
1143                                         } else {
1144                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1145                                         }
1146                                 }
1147                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1148                                 return false;
1149
1150                         case self::AS_BLANK_ARTICLE:
1151                                 $wgOut->redirect( $this->getContextTitle()->getFullURL() );
1152                                 return false;
1153
1154                         case self::AS_SPAM_ERROR:
1155                                 $this->spamPageWithContent( $resultDetails['spam'] );
1156                                 return false;
1157
1158                         case self::AS_BLOCKED_PAGE_FOR_USER:
1159                                 throw new UserBlockedError( $wgUser->getBlock() );
1160
1161                         case self::AS_IMAGE_REDIRECT_ANON:
1162                         case self::AS_IMAGE_REDIRECT_LOGGED:
1163                                 throw new PermissionsError( 'upload' );
1164
1165                         case self::AS_READ_ONLY_PAGE_ANON:
1166                         case self::AS_READ_ONLY_PAGE_LOGGED:
1167                                 throw new PermissionsError( 'edit' );
1168
1169                         case self::AS_READ_ONLY_PAGE:
1170                                 throw new ReadOnlyError;
1171
1172                         case self::AS_RATE_LIMITED:
1173                                 throw new ThrottledError();
1174
1175                         case self::AS_NO_CREATE_PERMISSION:
1176                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1177                                 throw new PermissionsError( $permission );
1178
1179                         default:
1180                                 // We don't recognize $status->value. The only way that can happen
1181                                 // is if an extension hook aborted from inside ArticleSave.
1182                                 // Render the status object into $this->hookError
1183                                 // FIXME this sucks, we should just use the Status object throughout
1184                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1185                                         '</div>';
1186                                 return true;
1187                 }
1188         }
1189
1190         /**
1191          * Attempt submission (no UI)
1192          *
1193          * @param $result
1194          * @param $bot bool
1195          *
1196          * @return Status object, possibly with a message, but always with one of the AS_* constants in $status->value,
1197          *
1198          * FIXME: This interface is TERRIBLE, but hard to get rid of due to various error display idiosyncrasies. There are
1199          * also lots of cases where error metadata is set in the object and retrieved later instead of being returned, e.g.
1200          * AS_CONTENT_TOO_BIG and AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some time.
1201          */
1202         function internalAttemptSave( &$result, $bot = false ) {
1203                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1204
1205                 $status = Status::newGood();
1206
1207                 wfProfileIn( __METHOD__  );
1208                 wfProfileIn( __METHOD__ . '-checks' );
1209
1210                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
1211                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1212                         $status->fatal( 'hookaborted' );
1213                         $status->value = self::AS_HOOK_ERROR;
1214                         wfProfileOut( __METHOD__ . '-checks' );
1215                         wfProfileOut( __METHOD__  );
1216                         return $status;
1217                 }
1218
1219                 try {
1220                         # Construct Content object
1221                         $textbox_content = $this->toEditContent( $this->textbox1 );
1222                 } catch (MWContentSerializationException $ex) {
1223                         $status->fatal( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
1224                         $status->value = self::AS_PARSE_ERROR;
1225                         wfProfileOut( __METHOD__ );
1226                         return $status;
1227                 }
1228
1229                 # Check image redirect
1230                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1231                         $textbox_content->isRedirect() &&
1232                         !$wgUser->isAllowed( 'upload' ) ) {
1233                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1234                                 $status->setResult( false, $code );
1235
1236                                 wfProfileOut( __METHOD__ . '-checks' );
1237                                 wfProfileOut( __METHOD__  );
1238
1239                                 return $status;
1240                 }
1241
1242                 # Check for spam
1243                 $match = self::matchSummarySpamRegex( $this->summary );
1244                 if ( $match === false ) {
1245                         $match = self::matchSpamRegex( $this->textbox1 );
1246                 }
1247                 if ( $match !== false ) {
1248                         $result['spam'] = $match;
1249                         $ip = $wgRequest->getIP();
1250                         $pdbk = $this->mTitle->getPrefixedDBkey();
1251                         $match = str_replace( "\n", '', $match );
1252                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1253                         $status->fatal( 'spamprotectionmatch', $match );
1254                         $status->value = self::AS_SPAM_ERROR;
1255                         wfProfileOut( __METHOD__ . '-checks' );
1256                         wfProfileOut( __METHOD__ );
1257                         return $status;
1258                 }
1259                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
1260                         # Error messages etc. could be handled within the hook...
1261                         $status->fatal( 'hookaborted' );
1262                         $status->value = self::AS_HOOK_ERROR;
1263                         wfProfileOut( __METHOD__ . '-checks' );
1264                         wfProfileOut( __METHOD__ );
1265                         return $status;
1266                 } elseif ( $this->hookError != '' ) {
1267                         # ...or the hook could be expecting us to produce an error
1268                         $status->fatal( 'hookaborted' );
1269                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1270                         wfProfileOut( __METHOD__ . '-checks' );
1271                         wfProfileOut( __METHOD__ );
1272                         return $status;
1273                 }
1274
1275                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1276                         // Auto-block user's IP if the account was "hard" blocked
1277                         $wgUser->spreadAnyEditBlock();
1278                         # Check block state against master, thus 'false'.
1279                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1280                         wfProfileOut( __METHOD__ . '-checks' );
1281                         wfProfileOut( __METHOD__ );
1282                         return $status;
1283                 }
1284
1285                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1286                 if ( $this->kblength > $wgMaxArticleSize ) {
1287                         // Error will be displayed by showEditForm()
1288                         $this->tooBig = true;
1289                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1290                         wfProfileOut( __METHOD__ . '-checks' );
1291                         wfProfileOut( __METHOD__ );
1292                         return $status;
1293                 }
1294
1295                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1296                         if ( $wgUser->isAnon() ) {
1297                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1298                                 wfProfileOut( __METHOD__ . '-checks' );
1299                                 wfProfileOut( __METHOD__ );
1300                                 return $status;
1301                         } else {
1302                                 $status->fatal( 'readonlytext' );
1303                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1304                                 wfProfileOut( __METHOD__ . '-checks' );
1305                                 wfProfileOut( __METHOD__ );
1306                                 return $status;
1307                         }
1308                 }
1309
1310                 if ( wfReadOnly() ) {
1311                         $status->fatal( 'readonlytext' );
1312                         $status->value = self::AS_READ_ONLY_PAGE;
1313                         wfProfileOut( __METHOD__ . '-checks' );
1314                         wfProfileOut( __METHOD__ );
1315                         return $status;
1316                 }
1317                 if ( $wgUser->pingLimiter() ) {
1318                         $status->fatal( 'actionthrottledtext' );
1319                         $status->value = self::AS_RATE_LIMITED;
1320                         wfProfileOut( __METHOD__ . '-checks' );
1321                         wfProfileOut( __METHOD__ );
1322                         return $status;
1323                 }
1324
1325                 # If the article has been deleted while editing, don't save it without
1326                 # confirmation
1327                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1328                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1329                         wfProfileOut( __METHOD__ . '-checks' );
1330                         wfProfileOut( __METHOD__ );
1331                         return $status;
1332                 }
1333
1334                 wfProfileOut( __METHOD__ . '-checks' );
1335
1336                 # Load the page data from the master. If anything changes in the meantime,
1337                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1338                 $this->mArticle->loadPageData( 'fromdbmaster' );
1339                 $new = !$this->mArticle->exists();
1340
1341                 if ( $new ) {
1342                         // Late check for create permission, just in case *PARANOIA*
1343                         if ( !$this->mTitle->userCan( 'create' ) ) {
1344                                 $status->fatal( 'nocreatetext' );
1345                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1346                                 wfDebug( __METHOD__ . ": no create permission\n" );
1347                                 wfProfileOut( __METHOD__ );
1348                                 return $status;
1349                         }
1350
1351                         # Don't save a new article if it's blank.
1352                         if ( $this->textbox1 == '' ) {
1353                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1354                                 wfProfileOut( __METHOD__ );
1355                                 return $status;
1356                         }
1357
1358                         // Run post-section-merge edit filter
1359                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
1360                                 # Error messages etc. could be handled within the hook...
1361                                 $status->fatal( 'hookaborted' );
1362                                 $status->value = self::AS_HOOK_ERROR;
1363                                 wfProfileOut( __METHOD__ );
1364                                 return $status;
1365                         } elseif ( $this->hookError != '' ) {
1366                                 # ...or the hook could be expecting us to produce an error
1367                                 $status->fatal( 'hookaborted' );
1368                                 $status->value = self::AS_HOOK_ERROR_EXPECTED;
1369                                 wfProfileOut( __METHOD__ );
1370                                 return $status;
1371                         }
1372
1373                         $content = $textbox_content;
1374
1375                         $result['sectionanchor'] = '';
1376                         if ( $this->section == 'new' ) {
1377                                 if ( $this->sectiontitle !== '' ) {
1378                                         // Insert the section title above the content.
1379                                         $content = $content->addSectionHeader( $this->sectiontitle );
1380
1381                                         // Jump to the new section
1382                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1383
1384                                         // If no edit summary was specified, create one automatically from the section
1385                                         // title and have it link to the new section. Otherwise, respect the summary as
1386                                         // passed.
1387                                         if ( $this->summary === '' ) {
1388                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1389                                                 $this->summary = wfMessage( 'newsectionsummary', $cleanSectionTitle )
1390                                                         ->inContentLanguage()->text() ;
1391                                         }
1392                                 } elseif ( $this->summary !== '' ) {
1393                                         // Insert the section title above the content.
1394                                         $content = $content->addSectionHeader( $this->summary );
1395
1396                                         // Jump to the new section
1397                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1398
1399                                         // Create a link to the new section from the edit summary.
1400                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1401                                         $this->summary = wfMessage( 'newsectionsummary', $cleanSummary )
1402                                                 ->inContentLanguage()->text();
1403                                 }
1404                         }
1405
1406                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1407
1408                 } else { # not $new
1409
1410                         # Article exists. Check for edit conflict.
1411
1412                         $this->mArticle->clear(); # Force reload of dates, etc.
1413                         $timestamp = $this->mArticle->getTimestamp();
1414
1415                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1416
1417                         if ( $timestamp != $this->edittime ) {
1418                                 $this->isConflict = true;
1419                                 if ( $this->section == 'new' ) {
1420                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1421                                                 $this->mArticle->getComment() == $this->summary ) {
1422                                                 // Probably a duplicate submission of a new comment.
1423                                                 // This can happen when squid resends a request after
1424                                                 // a timeout but the first one actually went through.
1425                                                 wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
1426                                         } else {
1427                                                 // New comment; suppress conflict.
1428                                                 $this->isConflict = false;
1429                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1430                                         }
1431                                 } elseif ( $this->section == '' && Revision::userWasLastToEdit( DB_MASTER,  $this->mTitle->getArticleID(),
1432                                                         $wgUser->getId(), $this->edittime ) ) {
1433                                         # Suppress edit conflict with self, except for section edits where merging is required.
1434                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1435                                         $this->isConflict = false;
1436                                 }
1437                         }
1438
1439                         // If sectiontitle is set, use it, otherwise use the summary as the section title (for
1440                         // backwards compatibility with old forms/bots).
1441                         if ( $this->sectiontitle !== '' ) {
1442                                 $sectionTitle = $this->sectiontitle;
1443                         } else {
1444                                 $sectionTitle = $this->summary;
1445                         }
1446
1447                         $content = null;
1448
1449                         if ( $this->isConflict ) {
1450                                 wfDebug( __METHOD__ . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1451                                                 . " (article time '{$timestamp}')\n" );
1452
1453                                 $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle, $this->edittime );
1454                         } else {
1455                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1456                                 $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle );
1457                         }
1458
1459                         if ( is_null( $content ) ) {
1460                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1461                                 $this->isConflict = true;
1462                                 $content = $textbox_content; // do not try to merge here!
1463                         } elseif ( $this->isConflict ) {
1464                                 # Attempt merge
1465                                 if ( $this->mergeChangesIntoContent( $textbox_content ) ) {
1466                                         // Successful merge! Maybe we should tell the user the good news?
1467                                         $this->isConflict = false;
1468                                         $content = $textbox_content;
1469                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1470                                 } else {
1471                                         $this->section = '';
1472                                         #$this->textbox1 = $text; #redundant, nothing to do here?
1473                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1474                                 }
1475                         }
1476
1477                         if ( $this->isConflict ) {
1478                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1479                                 wfProfileOut( __METHOD__ );
1480                                 return $status;
1481                         }
1482
1483                         // Run post-section-merge edit filter
1484                         $hook_args = array( $this, $content, &$this->hookError, $this->summary );
1485
1486                         if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged', $hook_args )
1487                                 || !wfRunHooks( 'EditFilterMergedContent', $hook_args ) ) {
1488                                 # Error messages etc. could be handled within the hook...
1489                                 $status->fatal( 'hookaborted' );
1490                                 $status->value = self::AS_HOOK_ERROR;
1491                                 wfProfileOut( __METHOD__ );
1492                                 return $status;
1493                         } elseif ( $this->hookError != '' ) {
1494                                 # ...or the hook could be expecting us to produce an error
1495                                 $status->fatal( 'hookaborted' );
1496                                 $status->value = self::AS_HOOK_ERROR_EXPECTED;
1497                                 wfProfileOut( __METHOD__ );
1498                                 return $status;
1499                         }
1500
1501                         # Handle the user preference to force summaries here, but not for null edits
1502                         if ( $this->section != 'new' && !$this->allowBlankSummary
1503                                 && !$content->equals( $this->getOriginalContent() )
1504                                 && !$content->isRedirect() ) # check if it's not a redirect
1505                         {
1506                                 if ( md5( $this->summary ) == $this->autoSumm ) {
1507                                         $this->missingSummary = true;
1508                                         $status->fatal( 'missingsummary' );
1509                                         $status->value = self::AS_SUMMARY_NEEDED;
1510                                         wfProfileOut( __METHOD__ );
1511                                         return $status;
1512                                 }
1513                         }
1514
1515                         # And a similar thing for new sections
1516                         if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1517                                 if ( trim( $this->summary ) == '' ) {
1518                                         $this->missingSummary = true;
1519                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1520                                         $status->value = self::AS_SUMMARY_NEEDED;
1521                                         wfProfileOut( __METHOD__ );
1522                                         return $status;
1523                                 }
1524                         }
1525
1526                         # All's well
1527                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1528                         $sectionanchor = '';
1529                         if ( $this->section == 'new' ) {
1530                                 if ( $this->textbox1 == '' ) {
1531                                         $this->missingComment = true;
1532                                         $status->fatal( 'missingcommenttext' );
1533                                         $status->value = self::AS_TEXTBOX_EMPTY;
1534                                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1535                                         wfProfileOut( __METHOD__ );
1536                                         return $status;
1537                                 }
1538                                 if ( $this->sectiontitle !== '' ) {
1539                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1540                                         // If no edit summary was specified, create one automatically from the section
1541                                         // title and have it link to the new section. Otherwise, respect the summary as
1542                                         // passed.
1543                                         if ( $this->summary === '' ) {
1544                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1545                                                 $this->summary = wfMessage( 'newsectionsummary', $cleanSectionTitle )
1546                                                         ->inContentLanguage()->text();
1547                                         }
1548                                 } elseif ( $this->summary !== '' ) {
1549                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1550                                         # This is a new section, so create a link to the new section
1551                                         # in the revision summary.
1552                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1553                                         $this->summary = wfMessage( 'newsectionsummary', $cleanSummary )
1554                                                 ->inContentLanguage()->text();
1555                                 }
1556                         } elseif ( $this->section != '' ) {
1557                                 # Try to get a section anchor from the section source, redirect to edited section if header found
1558                                 # XXX: might be better to integrate this into Article::replaceSection
1559                                 # for duplicate heading checking and maybe parsing
1560                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1561                                 # we can't deal with anchors, includes, html etc in the header for now,
1562                                 # headline would need to be parsed to improve this
1563                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1564                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1565                                 }
1566                         }
1567                         $result['sectionanchor'] = $sectionanchor;
1568                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1569
1570                         // Save errors may fall down to the edit form, but we've now
1571                         // merged the section into full text. Clear the section field
1572                         // so that later submission of conflict forms won't try to
1573                         // replace that into a duplicated mess.
1574                         $this->textbox1 = $this->toEditText( $content );
1575                         $this->section = '';
1576
1577                         $status->value = self::AS_SUCCESS_UPDATE;
1578                 }
1579
1580                 // Check for length errors again now that the section is merged in
1581                         $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1582                 if ( $this->kblength > $wgMaxArticleSize ) {
1583                         $this->tooBig = true;
1584                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1585                         wfProfileOut( __METHOD__ );
1586                         return $status;
1587                 }
1588
1589                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1590                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1591                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1592                         ( $bot ? EDIT_FORCE_BOT : 0 );
1593
1594                         $doEditStatus = $this->mArticle->doEditContent( $content, $this->summary, $flags,
1595                                                                                                                         false, null, $this->contentFormat );
1596
1597                 if ( $doEditStatus->isOK() ) {
1598                                 $result['redirect'] = $content->isRedirect();
1599                         $this->commitWatch();
1600                         wfProfileOut( __METHOD__ );
1601                         return $status;
1602                 } else {
1603                         // Failure from doEdit()
1604                         // Show the edit conflict page for certain recognized errors from doEdit(),
1605                         // but don't show it for errors from extension hooks
1606                         $errors = $doEditStatus->getErrorsArray();
1607                         if ( in_array( $errors[0][0], array( 'edit-gone-missing', 'edit-conflict',
1608                                 'edit-already-exists' ) ) )
1609                         {
1610                                 $this->isConflict = true;
1611                                 // Destroys data doEdit() put in $status->value but who cares
1612                                 $doEditStatus->value = self::AS_END;
1613                         }
1614                         wfProfileOut( __METHOD__ );
1615                         return $doEditStatus;
1616                 }
1617         }
1618
1619         /**
1620          * Commit the change of watch status
1621          */
1622         protected function commitWatch() {
1623                 global $wgUser;
1624                 if ( $wgUser->isLoggedIn() && $this->watchthis != $wgUser->isWatched( $this->mTitle ) ) {
1625                         $dbw = wfGetDB( DB_MASTER );
1626                         $dbw->begin( __METHOD__ );
1627                         if ( $this->watchthis ) {
1628                                 WatchAction::doWatch( $this->mTitle, $wgUser );
1629                         } else {
1630                                 WatchAction::doUnwatch( $this->mTitle, $wgUser );
1631                         }
1632                         $dbw->commit( __METHOD__ );
1633                 }
1634         }
1635
1636         /**
1637          * @private
1638          * @todo document
1639          *
1640          * @param $editText string
1641          *
1642          * @return bool
1643          * @deprecated since 1.21, use mergeChangesIntoContent() instead
1644          */
1645         function mergeChangesInto( &$editText ){
1646                 wfDebug( __METHOD__, "1.21" );
1647
1648                 $editContent = $this->toEditContent( $editText );
1649
1650                 $ok = $this->mergeChangesIntoContent( $editContent );
1651
1652                 if ( $ok ) {
1653                         $editText = $this->toEditText( $editContent );
1654                         return true;
1655                 } else {
1656                         return false;
1657                 }
1658         }
1659
1660         /**
1661          * @private
1662          * @todo document
1663          *
1664          * @parma $editText string
1665          *
1666          * @return bool
1667          * @since since 1.WD
1668          */
1669         private function mergeChangesIntoContent( &$editContent ){
1670                 wfProfileIn( __METHOD__ );
1671
1672                 $db = wfGetDB( DB_MASTER );
1673
1674                 // This is the revision the editor started from
1675                 $baseRevision = $this->getBaseRevision();
1676                 if ( is_null( $baseRevision ) ) {
1677                         wfProfileOut( __METHOD__ );
1678                         return false;
1679                 }
1680                 $baseContent = $baseRevision->getContent();
1681
1682                 // The current state, we want to merge updates into it
1683                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1684                 if ( is_null( $currentRevision ) ) {
1685                         wfProfileOut( __METHOD__ );
1686                         return false;
1687                 }
1688                 $currentContent = $currentRevision->getContent();
1689
1690                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
1691
1692                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
1693
1694                 if ( $result ) {
1695                         $editContent = $result;
1696                         wfProfileOut( __METHOD__ );
1697                         return true;
1698                 } else {
1699                         wfProfileOut( __METHOD__ );
1700                         return false;
1701                 }
1702         }
1703
1704         /**
1705          * @return Revision
1706          */
1707         function getBaseRevision() {
1708                 if ( !$this->mBaseRevision ) {
1709                         $db = wfGetDB( DB_MASTER );
1710                         $baseRevision = Revision::loadFromTimestamp(
1711                                 $db, $this->mTitle, $this->edittime );
1712                         return $this->mBaseRevision = $baseRevision;
1713                 } else {
1714                         return $this->mBaseRevision;
1715                 }
1716         }
1717
1718         /**
1719          * Check given input text against $wgSpamRegex, and return the text of the first match.
1720          *
1721          * @param $text string
1722          *
1723          * @return string|bool matching string or false
1724          */
1725         public static function matchSpamRegex( $text ) {
1726                 global $wgSpamRegex;
1727                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1728                 $regexes = (array)$wgSpamRegex;
1729                 return self::matchSpamRegexInternal( $text, $regexes );
1730         }
1731
1732         /**
1733          * Check given input text against $wgSpamRegex, and return the text of the first match.
1734          *
1735          * @param $text string
1736          *
1737          * @return string|bool  matching string or false
1738          */
1739         public static function matchSummarySpamRegex( $text ) {
1740                 global $wgSummarySpamRegex;
1741                 $regexes = (array)$wgSummarySpamRegex;
1742                 return self::matchSpamRegexInternal( $text, $regexes );
1743         }
1744
1745         /**
1746          * @param $text string
1747          * @param $regexes array
1748          * @return bool|string
1749          */
1750         protected static function matchSpamRegexInternal( $text, $regexes ) {
1751                 foreach ( $regexes as $regex ) {
1752                         $matches = array();
1753                         if ( preg_match( $regex, $text, $matches ) ) {
1754                                 return $matches[0];
1755                         }
1756                 }
1757                 return false;
1758         }
1759
1760         function setHeaders() {
1761                 global $wgOut, $wgUser;
1762
1763                 $wgOut->addModules( 'mediawiki.action.edit' );
1764
1765                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
1766                         $wgOut->addModules( 'mediawiki.legacy.preview' );
1767                 }
1768                 // Bug #19334: textarea jumps when editing articles in IE8
1769                 $wgOut->addStyle( 'common/IE80Fixes.css', 'screen', 'IE 8' );
1770
1771                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1772
1773                 # Enabled article-related sidebar, toplinks, etc.
1774                 $wgOut->setArticleRelated( true );
1775
1776                 $contextTitle = $this->getContextTitle();
1777                 if ( $this->isConflict ) {
1778                         $msg = 'editconflict';
1779                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
1780                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1781                 } else {
1782                         $msg = $contextTitle->exists() || ( $contextTitle->getNamespace() == NS_MEDIAWIKI && $contextTitle->getDefaultMessageText() !== false ) ?
1783                                 'editing' : 'creating';
1784                 }
1785                 # Use the title defined by DISPLAYTITLE magic word when present
1786                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
1787                 if ( $displayTitle === false ) {
1788                         $displayTitle = $contextTitle->getPrefixedText();
1789                 }
1790                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
1791         }
1792
1793         /**
1794          * Show all applicable editing introductions
1795          */
1796         protected function showIntro() {
1797                 global $wgOut, $wgUser;
1798                 if ( $this->suppressIntro ) {
1799                         return;
1800                 }
1801
1802                 $namespace = $this->mTitle->getNamespace();
1803
1804                 if ( $namespace == NS_MEDIAWIKI ) {
1805                         # Show a warning if editing an interface message
1806                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
1807                 } else if( $namespace == NS_FILE ) {
1808                         # Show a hint to shared repo
1809                         $file = wfFindFile( $this->mTitle );
1810                         if( $file && !$file->isLocal() ) {
1811                                 $descUrl = $file->getDescriptionUrl();
1812                                 # there must be a description url to show a hint to shared repo
1813                                 if( $descUrl ) {
1814                                         if( !$this->mTitle->exists() ) {
1815                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array (
1816                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
1817                                                 ) );
1818                                         } else {
1819                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
1820                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
1821                                                 ) );
1822                                         }
1823                                 }
1824                         }
1825                 }
1826
1827                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
1828                 # Show log extract when the user is currently blocked
1829                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
1830                         $parts = explode( '/', $this->mTitle->getText(), 2 );
1831                         $username = $parts[0];
1832                         $user = User::newFromName( $username, false /* allow IP users*/ );
1833                         $ip = User::isIP( $username );
1834                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
1835                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
1836                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
1837                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
1838                                 LogEventsList::showLogExtract(
1839                                         $wgOut,
1840                                         'block',
1841                                         $user->getUserPage(),
1842                                         '',
1843                                         array(
1844                                                 'lim' => 1,
1845                                                 'showIfEmpty' => false,
1846                                                 'msgKey' => array(
1847                                                         'blocked-notice-logextract',
1848                                                         $user->getName() # Support GENDER in notice
1849                                                 )
1850                                         )
1851                                 );
1852                         }
1853                 }
1854                 # Try to add a custom edit intro, or use the standard one if this is not possible.
1855                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
1856                         if ( $wgUser->isLoggedIn() ) {
1857                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
1858                         } else {
1859                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
1860                         }
1861                 }
1862                 # Give a notice if the user is editing a deleted/moved page...
1863                 if ( !$this->mTitle->exists() ) {
1864                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
1865                                 '', array( 'lim' => 10,
1866                                            'conds' => array( "log_action != 'revision'" ),
1867                                            'showIfEmpty' => false,
1868                                            'msgKey' => array( 'recreate-moveddeleted-warn' ) )
1869                         );
1870                 }
1871         }
1872
1873         /**
1874          * Attempt to show a custom editing introduction, if supplied
1875          *
1876          * @return bool
1877          */
1878         protected function showCustomIntro() {
1879                 if ( $this->editintro ) {
1880                         $title = Title::newFromText( $this->editintro );
1881                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
1882                                 global $wgOut;
1883                                 // Added using template syntax, to take <noinclude>'s into account.
1884                                 $wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
1885                                 return true;
1886                         } else {
1887                                 return false;
1888                         }
1889                 } else {
1890                         return false;
1891                 }
1892         }
1893
1894         /**
1895          * Gets an editable textual representation of the given Content object.
1896          * The textual representation can be turned by into a Content object by the
1897          * toEditContent() method.
1898          *
1899          * If the given Content object is not of a type that can be edited using the text base EditPage,
1900          * an exception will be raised. Set $this->allowNonTextContent to true to allow editing of non-textual
1901          * content.
1902          *
1903          * @param Content $content
1904          * @return String the editable text form of the content.
1905          *
1906          * @throws MWException if $content is not an instance of TextContent and $this->allowNonTextContent is not true.
1907          */
1908         protected function toEditText( Content $content ) {
1909                 if ( !$this->allowNonTextContent && !( $content instanceof TextContent ) ) {
1910                         throw new MWException( "This content model can not be edited as text: "
1911                                                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
1912                 }
1913
1914                 return $content->serialize( $this->contentFormat );
1915         }
1916
1917         /**
1918          * Turns the given text into a Content object by unserializing it.
1919          *
1920          * If the resulting Content object is not of a type that can be edited using the text base EditPage,
1921          * an exception will be raised. Set $this->allowNonTextContent to true to allow editing of non-textual
1922          * content.
1923          *
1924          * @param String $text Text to unserialize
1925          * @return Content the content object created from $text
1926          *
1927          * @throws MWException if unserializing the text results in a Content object that is not an instance of TextContent
1928          *          and $this->allowNonTextContent is not true.
1929          */
1930         protected function toEditContent( $text ) {
1931                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
1932                         $this->contentModel, $this->contentFormat );
1933
1934                 if ( !$this->allowNonTextContent && !( $content instanceof TextContent ) ) {
1935                         throw new MWException( "This content model can not be edited as text: "
1936                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
1937                 }
1938
1939                 return $content;
1940         }
1941
1942         /**
1943          * Send the edit form and related headers to $wgOut
1944          * @param $formCallback Callback that takes an OutputPage parameter; will be called
1945          *     during form output near the top, for captchas and the like.
1946          */
1947         function showEditForm( $formCallback = null ) {
1948                 global $wgOut, $wgUser;
1949
1950                 wfProfileIn( __METHOD__ );
1951
1952                 # need to parse the preview early so that we know which templates are used,
1953                 # otherwise users with "show preview after edit box" will get a blank list
1954                 # we parse this near the beginning so that setHeaders can do the title
1955                 # setting work instead of leaving it in getPreviewText
1956                 $previewOutput = '';
1957                 if ( $this->formtype == 'preview' ) {
1958                         $previewOutput = $this->getPreviewText();
1959                 }
1960
1961                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
1962
1963                 $this->setHeaders();
1964
1965                 if ( $this->showHeader() === false ) {
1966                         wfProfileOut( __METHOD__ );
1967                         return;
1968                 }
1969
1970                 $wgOut->addHTML( $this->editFormPageTop );
1971
1972                 if ( $wgUser->getOption( 'previewontop' ) ) {
1973                         $this->displayPreviewArea( $previewOutput, true );
1974                 }
1975
1976                 $wgOut->addHTML( $this->editFormTextTop );
1977
1978                 $showToolbar = true;
1979                 if ( $this->wasDeletedSinceLastEdit() ) {
1980                         if ( $this->formtype == 'save' ) {
1981                                 // Hide the toolbar and edit area, user can click preview to get it back
1982                                 // Add an confirmation checkbox and explanation.
1983                                 $showToolbar = false;
1984                         } else {
1985                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
1986                                         'deletedwhileediting' );
1987                         }
1988                 }
1989
1990                 //@todo: add EditForm plugin interface and use it here!
1991                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
1992                 $wgOut->addHTML( Html::openElement( 'form', array( 'id' => self::EDITFORM_ID, 'name' => self::EDITFORM_ID,
1993                         'method' => 'post', 'action' => $this->getActionURL( $this->getContextTitle() ),
1994                         'enctype' => 'multipart/form-data' ) ) );
1995
1996                 if ( is_callable( $formCallback ) ) {
1997                         call_user_func_array( $formCallback, array( &$wgOut ) );
1998                 }
1999
2000                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
2001
2002                 // Put these up at the top to ensure they aren't lost on early form submission
2003                 $this->showFormBeforeText();
2004
2005                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2006                         $username = $this->lastDelete->user_name;
2007                         $comment = $this->lastDelete->log_comment;
2008
2009                         // It is better to not parse the comment at all than to have templates expanded in the middle
2010                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2011                         $key = $comment === ''
2012                                 ? 'confirmrecreate-noreason'
2013                                 : 'confirmrecreate';
2014                         $wgOut->addHTML(
2015                                 '<div class="mw-confirm-recreate">' .
2016                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2017                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2018                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2019                                 ) .
2020                                 '</div>'
2021                         );
2022                 }
2023
2024                 # When the summary is hidden, also hide them on preview/show changes
2025                 if( $this->nosummary ) {
2026                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2027                 }
2028
2029                 # If a blank edit summary was previously provided, and the appropriate
2030                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2031                 # user being bounced back more than once in the event that a summary
2032                 # is not required.
2033                 #####
2034                 # For a bit more sophisticated detection of blank summaries, hash the
2035                 # automatic one and pass that in the hidden field wpAutoSummary.
2036                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2037                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2038                 }
2039
2040                 if ( $this->undidRev ) {
2041                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2042                 }
2043
2044                 if ( $this->hasPresetSummary ) {
2045                         // If a summary has been preset using &summary= we dont want to prompt for
2046                         // a different summary. Only prompt for a summary if the summary is blanked.
2047                         // (Bug 17416)
2048                         $this->autoSumm = md5( '' );
2049                 }
2050
2051                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2052                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2053
2054                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2055
2056                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2057                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2058
2059                 if ( $this->section == 'new' ) {
2060                         $this->showSummaryInput( true, $this->summary );
2061                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2062                 }
2063
2064                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2065
2066                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2067                         $wgOut->addHTML( EditPage::getEditToolbar() );
2068                 }
2069
2070                 if ( $this->isConflict ) {
2071                         // In an edit conflict bypass the overrideable content form method
2072                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2073                         // resolved between page source edits and custom ui edits using the
2074                         // custom edit ui.
2075                         $this->textbox2 = $this->textbox1;
2076
2077                         $content = $this->getCurrentContent();
2078                         $this->textbox1 = $this->toEditText( $content );
2079
2080                         $this->showTextbox1();
2081                 } else {
2082                         $this->showContentForm();
2083                 }
2084
2085                 $wgOut->addHTML( $this->editFormTextAfterContent );
2086
2087                 $this->showStandardInputs();
2088
2089                 $this->showFormAfterText();
2090
2091                 $this->showTosSummary();
2092
2093                 $this->showEditTools();
2094
2095                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2096
2097                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2098                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2099
2100                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2101                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2102
2103                 if ( $this->isConflict ) {
2104                         try {
2105                                 $this->showConflict();
2106                         } catch ( MWContentSerializationException $ex ) {
2107                                 // this can't really happen, but be nice if it does.
2108                                 $msg = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
2109                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>');
2110                         }
2111                 }
2112
2113                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2114
2115                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2116                         $this->displayPreviewArea( $previewOutput, false );
2117                 }
2118
2119                 wfProfileOut( __METHOD__ );
2120         }
2121
2122         /**
2123          * Extract the section title from current section text, if any.
2124          *
2125          * @param string $text
2126          * @return Mixed|string or false
2127          */
2128         public static function extractSectionTitle( $text ) {
2129                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2130                 if ( !empty( $matches[2] ) ) {
2131                         global $wgParser;
2132                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2133                 } else {
2134                         return false;
2135                 }
2136         }
2137
2138         protected function showHeader() {
2139                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2140
2141                 if ( $this->mTitle->isTalkPage() ) {
2142                         $wgOut->addWikiMsg( 'talkpagetext' );
2143                 }
2144
2145                 # Optional notices on a per-namespace and per-page basis
2146                 $editnotice_ns = 'editnotice-' . $this->mTitle->getNamespace();
2147                 $editnotice_ns_message = wfMessage( $editnotice_ns );
2148                 if ( $editnotice_ns_message->exists() ) {
2149                         $wgOut->addWikiText( $editnotice_ns_message->plain() );
2150                 }
2151                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
2152                         $parts = explode( '/', $this->mTitle->getDBkey() );
2153                         $editnotice_base = $editnotice_ns;
2154                         while ( count( $parts ) > 0 ) {
2155                                 $editnotice_base .= '-' . array_shift( $parts );
2156                                 $editnotice_base_msg = wfMessage( $editnotice_base );
2157                                 if ( $editnotice_base_msg->exists() ) {
2158                                         $wgOut->addWikiText( $editnotice_base_msg->plain() );
2159                                 }
2160                         }
2161                 } else {
2162                         # Even if there are no subpages in namespace, we still don't want / in MW ns.
2163                         $editnoticeText = $editnotice_ns . '-' . str_replace( '/', '-', $this->mTitle->getDBkey() );
2164                         $editnoticeMsg = wfMessage( $editnoticeText );
2165                         if ( $editnoticeMsg->exists() ) {
2166                                 $wgOut->addWikiText( $editnoticeMsg->plain() );
2167                         }
2168                 }
2169
2170                 if ( $this->isConflict ) {
2171                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2172                         $this->edittime = $this->mArticle->getTimestamp();
2173                 } else {
2174                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2175                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2176                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2177                                 // Someone is welcome to try refactoring though
2178                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2179                                 return false;
2180                         }
2181
2182                         if ( $this->section != '' && $this->section != 'new' ) {
2183                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2184                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); //FIXME: use Content object
2185                                         if ( $sectionTitle !== false ) {
2186                                                 $this->summary = "/* $sectionTitle */ ";
2187                                         }
2188                                 }
2189                         }
2190
2191                         if ( $this->missingComment ) {
2192                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2193                         }
2194
2195                         if ( $this->missingSummary && $this->section != 'new' ) {
2196                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2197                         }
2198
2199                         if ( $this->missingSummary && $this->section == 'new' ) {
2200                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2201                         }
2202
2203                         if ( $this->hookError !== '' ) {
2204                                 $wgOut->addWikiText( $this->hookError );
2205                         }
2206
2207                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2208                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2209                         }
2210
2211                         if ( $this->section != 'new' ) {
2212                                 $revision = $this->mArticle->getRevisionFetched();
2213                                 if ( $revision ) {
2214                                         // Let sysop know that this will make private content public if saved
2215
2216                                         if ( !$revision->userCan( Revision::DELETED_TEXT ) ) {
2217                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
2218                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2219                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
2220                                         }
2221
2222                                         if ( !$revision->isCurrent() ) {
2223                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2224                                                 $wgOut->addWikiMsg( 'editingold' );
2225                                         }
2226                                 } elseif ( $this->mTitle->exists() ) {
2227                                         // Something went wrong
2228
2229                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2230                                                 array( 'missing-revision', $this->oldid ) );
2231                                 }
2232                         }
2233                 }
2234
2235                 if ( wfReadOnly() ) {
2236                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
2237                 } elseif ( $wgUser->isAnon() ) {
2238                         if ( $this->formtype != 'preview' ) {
2239                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
2240                         } else {
2241                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
2242                         }
2243                 } else {
2244                         if ( $this->isCssJsSubpage ) {
2245                                 # Check the skin exists
2246                                 if ( $this->isWrongCaseCssJsPage ) {
2247                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
2248                                 }
2249                                 if ( $this->formtype !== 'preview' ) {
2250                                         if ( $this->isCssSubpage )
2251                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
2252                                         if ( $this->isJsSubpage )
2253                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
2254                                 }
2255                         }
2256                 }
2257
2258                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2259                         # Is the title semi-protected?
2260                         if ( $this->mTitle->isSemiProtected() ) {
2261                                 $noticeMsg = 'semiprotectedpagewarning';
2262                         } else {
2263                                 # Then it must be protected based on static groups (regular)
2264                                 $noticeMsg = 'protectedpagewarning';
2265                         }
2266                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2267                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2268                 }
2269                 if ( $this->mTitle->isCascadeProtected() ) {
2270                         # Is this page under cascading protection from some source pages?
2271                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2272                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2273                         $cascadeSourcesCount = count( $cascadeSources );
2274                         if ( $cascadeSourcesCount > 0 ) {
2275                                 # Explain, and list the titles responsible
2276                                 foreach ( $cascadeSources as $page ) {
2277                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2278                                 }
2279                         }
2280                         $notice .= '</div>';
2281                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2282                 }
2283                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2284                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2285                                 array( 'lim' => 1,
2286                                         'showIfEmpty' => false,
2287                                         'msgKey' => array( 'titleprotectedwarning' ),
2288                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2289                 }
2290
2291                 if ( $this->kblength === false ) {
2292                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2293                 }
2294
2295                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2296                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2297                                 array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
2298                 } else {
2299                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2300                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2301                                         array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
2302                                 );
2303                         }
2304                 }
2305                 # Add header copyright warning
2306                 $this->showHeaderCopyrightWarning();
2307         }
2308
2309
2310         /**
2311          * Standard summary input and label (wgSummary), abstracted so EditPage
2312          * subclasses may reorganize the form.
2313          * Note that you do not need to worry about the label's for=, it will be
2314          * inferred by the id given to the input. You can remove them both by
2315          * passing array( 'id' => false ) to $userInputAttrs.
2316          *
2317          * @param $summary string The value of the summary input
2318          * @param $labelText string The html to place inside the label
2319          * @param $inputAttrs array of attrs to use on the input
2320          * @param $spanLabelAttrs array of attrs to use on the span inside the label
2321          *
2322          * @return array An array in the format array( $label, $input )
2323          */
2324         function getSummaryInput( $summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null ) {
2325                 // Note: the maxlength is overriden in JS to 255 and to make it use UTF-8 bytes, not characters.
2326                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2327                         'id' => 'wpSummary',
2328                         'maxlength' => '200',
2329                         'tabindex' => '1',
2330                         'size' => 60,
2331                         'spellcheck' => 'true',
2332                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2333
2334                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2335                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2336                         'id' => "wpSummaryLabel"
2337                 );
2338
2339                 $label = null;
2340                 if ( $labelText ) {
2341                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
2342                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2343                 }
2344
2345                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2346
2347                 return array( $label, $input );
2348         }
2349
2350         /**
2351          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2352          *                          up top, or false if this is the comment summary
2353          *                          down below the textarea
2354          * @param $summary String: The text of the summary to display
2355          * @return String
2356          */
2357         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2358                 global $wgOut, $wgContLang;
2359                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2360                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2361                 if ( $isSubjectPreview ) {
2362                         if ( $this->nosummary ) {
2363                                 return;
2364                         }
2365                 } else {
2366                         if ( !$this->mShowSummaryField ) {
2367                                 return;
2368                         }
2369                 }
2370                 $summary = $wgContLang->recodeForEdit( $summary );
2371                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2372                 list( $label, $input ) = $this->getSummaryInput( $summary, $labelText, array( 'class' => $summaryClass ), array() );
2373                 $wgOut->addHTML( "{$label} {$input}" );
2374         }
2375
2376         /**
2377          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2378          *                          up top, or false if this is the comment summary
2379          *                          down below the textarea
2380          * @param $summary String: the text of the summary to display
2381          * @return String
2382          */
2383         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2384                 if ( !$summary || ( !$this->preview && !$this->diff ) )
2385                         return "";
2386
2387                 global $wgParser;
2388
2389                 if ( $isSubjectPreview )
2390                         $summary = wfMessage( 'newsectionsummary', $wgParser->stripSectionName( $summary ) )
2391                                 ->inContentLanguage()->text();
2392
2393                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2394
2395                 $summary = wfMessage( $message )->parse() . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2396                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2397         }
2398
2399         protected function showFormBeforeText() {
2400                 global $wgOut;
2401                 $section = htmlspecialchars( $this->section );
2402                 $wgOut->addHTML( <<<HTML
2403 <input type='hidden' value="{$section}" name="wpSection" />
2404 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2405 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2406 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2407
2408 HTML
2409                 );
2410                 if ( !$this->checkUnicodeCompliantBrowser() )
2411                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2412         }
2413
2414         protected function showFormAfterText() {
2415                 global $wgOut, $wgUser;
2416                 /**
2417                  * To make it harder for someone to slip a user a page
2418                  * which submits an edit form to the wiki without their
2419                  * knowledge, a random token is associated with the login
2420                  * session. If it's not passed back with the submission,
2421                  * we won't save the page, or render user JavaScript and
2422                  * CSS previews.
2423                  *
2424                  * For anon editors, who may not have a session, we just
2425                  * include the constant suffix to prevent editing from
2426                  * broken text-mangling proxies.
2427                  */
2428                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2429         }
2430
2431         /**
2432          * Subpage overridable method for printing the form for page content editing
2433          * By default this simply outputs wpTextbox1
2434          * Subclasses can override this to provide a custom UI for editing;
2435          * be it a form, or simply wpTextbox1 with a modified content that will be
2436          * reverse modified when extracted from the post data.
2437          * Note that this is basically the inverse for importContentFormData
2438          */
2439         protected function showContentForm() {
2440                 $this->showTextbox1();
2441         }
2442
2443         /**
2444          * Method to output wpTextbox1
2445          * The $textoverride method can be used by subclasses overriding showContentForm
2446          * to pass back to this method.
2447          *
2448          * @param $customAttribs array of html attributes to use in the textarea
2449          * @param $textoverride String: optional text to override $this->textarea1 with
2450          */
2451         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2452                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2453                         $attribs = array( 'style' => 'display:none;' );
2454                 } else {
2455                         $classes = array(); // Textarea CSS
2456                         if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2457                                 # Is the title semi-protected?
2458                                 if ( $this->mTitle->isSemiProtected() ) {
2459                                         $classes[] = 'mw-textarea-sprotected';
2460                                 } else {
2461                                         # Then it must be protected based on static groups (regular)
2462                                         $classes[] = 'mw-textarea-protected';
2463                                 }
2464                                 # Is the title cascade-protected?
2465                                 if ( $this->mTitle->isCascadeProtected() ) {
2466                                         $classes[] = 'mw-textarea-cprotected';
2467                                 }
2468                         }
2469
2470                         $attribs = array( 'tabindex' => 1 );
2471
2472                         if ( is_array( $customAttribs ) ) {
2473                                 $attribs += $customAttribs;
2474                         }
2475
2476                         if ( count( $classes ) ) {
2477                                 if ( isset( $attribs['class'] ) ) {
2478                                         $classes[] = $attribs['class'];
2479                                 }
2480                                 $attribs['class'] = implode( ' ', $classes );
2481                         }
2482                 }
2483
2484                 $this->showTextbox( $textoverride !== null ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
2485         }
2486
2487         protected function showTextbox2() {
2488                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2489         }
2490
2491         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2492                 global $wgOut, $wgUser;
2493
2494                 $wikitext = $this->safeUnicodeOutput( $text );
2495                 if ( strval( $wikitext ) !== '' ) {
2496                         // Ensure there's a newline at the end, otherwise adding lines
2497                         // is awkward.
2498                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2499                         // mode will show an extra newline. A bit annoying.
2500                         $wikitext .= "\n";
2501                 }
2502
2503                 $attribs = $customAttribs + array(
2504                         'accesskey' => ',',
2505                         'id'   => $name,
2506                         'cols' => $wgUser->getIntOption( 'cols' ),
2507                         'rows' => $wgUser->getIntOption( 'rows' ),
2508                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
2509                 );
2510
2511                 $pageLang = $this->mTitle->getPageLanguage();
2512                 $attribs['lang'] = $pageLang->getCode();
2513                 $attribs['dir'] = $pageLang->getDir();
2514
2515                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2516         }
2517
2518         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2519                 global $wgOut;
2520                 $classes = array();
2521                 if ( $isOnTop )
2522                         $classes[] = 'ontop';
2523
2524                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2525
2526                 if ( $this->formtype != 'preview' )
2527                         $attribs['style'] = 'display: none;';
2528
2529                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2530
2531                 if ( $this->formtype == 'preview' ) {
2532                         $this->showPreview( $previewOutput );
2533                 }
2534
2535                 $wgOut->addHTML( '</div>' );
2536
2537                 if ( $this->formtype == 'diff' ) {
2538                         try {
2539                                 $this->showDiff();
2540                         } catch ( MWContentSerializationException $ex ) {
2541                                 $msg = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
2542                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>');
2543                         }
2544                 }
2545         }
2546
2547         /**
2548          * Append preview output to $wgOut.
2549          * Includes category rendering if this is a category page.
2550          *
2551          * @param $text String: the HTML to be output for the preview.
2552          */
2553         protected function showPreview( $text ) {
2554                 global $wgOut;
2555                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2556                         $this->mArticle->openShowCategory();
2557                 }
2558                 # This hook seems slightly odd here, but makes things more
2559                 # consistent for extensions.
2560                 wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
2561                 $wgOut->addHTML( $text );
2562                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2563                         $this->mArticle->closeShowCategory();
2564                 }
2565         }
2566
2567         /**
2568          * Get a diff between the current contents of the edit box and the
2569          * version of the page we're editing from.
2570          *
2571          * If this is a section edit, we'll replace the section as for final
2572          * save and then make a comparison.
2573          */
2574         function showDiff() {
2575                 global $wgUser, $wgContLang, $wgParser, $wgOut;
2576
2577                 $oldtitlemsg = 'currentrev';
2578                 # if message does not exist, show diff against the preloaded default
2579                 if( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
2580                         $oldtext = $this->mTitle->getDefaultMessageText();
2581                         if( $oldtext !== false ) {
2582                                 $oldtitlemsg = 'defaultmessagetext';
2583                                 $oldContent = $this->toEditContent( $oldtext );
2584                         } else {
2585                                 $oldContent = null;
2586                         }
2587                 } else {
2588                         $oldContent = $this->getOriginalContent();
2589                 }
2590
2591                 $textboxContent = $this->toEditContent( $this->textbox1 );
2592
2593                 $newContent = $this->mArticle->replaceSectionContent(
2594                                                         $this->section, $textboxContent,
2595                                                         $this->summary, $this->edittime );
2596
2597                 ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
2598                 wfRunHooks( 'EditPageGetDiffContent', array( $this, &$newContent ) );
2599
2600                 $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
2601                 $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
2602
2603                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
2604                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
2605                         $newtitle = wfMessage( 'yourtext' )->parse();
2606
2607                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
2608                         $de->setContent( $oldContent, $newContent );
2609
2610                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2611                         $de->showDiffStyle();
2612                 } else {
2613                         $difftext = '';
2614                 }
2615
2616                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2617         }
2618
2619         /**
2620          * Show the header copyright warning.
2621          */
2622         protected function showHeaderCopyrightWarning() {
2623                 $msg = 'editpage-head-copy-warn';
2624                 if ( !wfMessage( $msg )->isDisabled() ) {
2625                         global $wgOut;
2626                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
2627                                 'editpage-head-copy-warn' );
2628                 }
2629         }
2630
2631         /**
2632          * Give a chance for site and per-namespace customizations of
2633          * terms of service summary link that might exist separately
2634          * from the copyright notice.
2635          *
2636          * This will display between the save button and the edit tools,
2637          * so should remain short!
2638          */
2639         protected function showTosSummary() {
2640                 $msg = 'editpage-tos-summary';
2641                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
2642                 if ( !wfMessage( $msg )->isDisabled() ) {
2643                         global $wgOut;
2644                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
2645                         $wgOut->addWikiMsg( $msg );
2646                         $wgOut->addHTML( '</div>' );
2647                 }
2648         }
2649
2650         protected function showEditTools() {
2651                 global $wgOut;
2652                 $wgOut->addHTML( '<div class="mw-editTools">' .
2653                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
2654                         '</div>' );
2655         }
2656
2657         /**
2658          * Get the copyright warning
2659          *
2660          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
2661          */
2662         protected function getCopywarn() {
2663                 return self::getCopyrightWarning( $this->mTitle );
2664         }
2665
2666         public static function getCopyrightWarning( $title ) {
2667                 global $wgRightsText;
2668                 if ( $wgRightsText ) {
2669                         $copywarnMsg = array( 'copyrightwarning',
2670                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
2671                                 $wgRightsText );
2672                 } else {
2673                         $copywarnMsg = array( 'copyrightwarning2',
2674                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
2675                 }
2676                 // Allow for site and per-namespace customization of contribution/copyright notice.
2677                 wfRunHooks( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
2678
2679                 return "<div id=\"editpage-copywarn\">\n" .
2680                         call_user_func_array( 'wfMessage', $copywarnMsg )->plain() . "\n</div>";
2681         }
2682
2683         protected function showStandardInputs( &$tabindex = 2 ) {
2684                 global $wgOut;
2685                 $wgOut->addHTML( "<div class='editOptions'>\n" );
2686
2687                 if ( $this->section != 'new' ) {
2688                         $this->showSummaryInput( false, $this->summary );
2689                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
2690                 }
2691
2692                 $checkboxes = $this->getCheckboxes( $tabindex,
2693                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
2694                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
2695
2696                 // Show copyright warning.
2697                 $wgOut->addWikiText( $this->getCopywarn() );
2698                 $wgOut->addHTML( $this->editFormTextAfterWarn );
2699
2700                 $wgOut->addHTML( "<div class='editButtons'>\n" );
2701                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
2702
2703                 $cancel = $this->getCancelLink();
2704                 if ( $cancel !== '' ) {
2705                         $cancel .= wfMessage( 'pipe-separator' )->text();
2706                 }
2707                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMessage( 'edithelppage' )->inContentLanguage()->text() );
2708                 $edithelp = '<a target="helpwindow" href="' . $edithelpurl . '">' .
2709                         wfMessage( 'edithelp' )->escaped() . '</a> ' .
2710                         wfMessage( 'newwindow' )->parse();
2711                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
2712                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
2713                 $wgOut->addHTML( "</div><!-- editButtons -->\n</div><!-- editOptions -->\n" );
2714         }
2715
2716         /**
2717          * Show an edit conflict. textbox1 is already shown in showEditForm().
2718          * If you want to use another entry point to this function, be careful.
2719          */
2720         protected function showConflict() {
2721                 global $wgOut;
2722
2723                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
2724                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2725
2726                         $content1 = $this->toEditContent( $this->textbox1 );
2727                         $content2 = $this->toEditContent( $this->textbox2 );
2728
2729                         $handler = ContentHandler::getForModelID( $this->contentModel );
2730                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
2731                         $de->setContent( $content2, $content1 );
2732                         $de->showDiff(
2733                                 wfMessage( 'yourtext' )->parse(),
2734                                 wfMessage( 'storedversion' )->text()
2735                         );
2736
2737                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2738                         $this->showTextbox2();
2739                 }
2740         }
2741
2742         /**
2743          * @return string
2744          */
2745         public function getCancelLink() {
2746                 $cancelParams = array();
2747                 if ( !$this->isConflict && $this->oldid > 0 ) {
2748                         $cancelParams['oldid'] = $this->oldid;
2749                 }
2750
2751                 return Linker::linkKnown(
2752                         $this->getContextTitle(),
2753                         wfMessage( 'cancel' )->parse(),
2754                         array( 'id' => 'mw-editform-cancel' ),
2755                         $cancelParams
2756                 );
2757         }
2758
2759         /**
2760          * Returns the URL to use in the form's action attribute.
2761          * This is used by EditPage subclasses when simply customizing the action
2762          * variable in the constructor is not enough. This can be used when the
2763          * EditPage lives inside of a Special page rather than a custom page action.
2764          *
2765          * @param $title Title object for which is being edited (where we go to for &action= links)
2766          * @return string
2767          */
2768         protected function getActionURL( Title $title ) {
2769                 return $title->getLocalURL( array( 'action' => $this->action ) );
2770         }
2771
2772         /**
2773          * Check if a page was deleted while the user was editing it, before submit.
2774          * Note that we rely on the logging table, which hasn't been always there,
2775          * but that doesn't matter, because this only applies to brand new
2776          * deletes.
2777          */
2778         protected function wasDeletedSinceLastEdit() {
2779                 if ( $this->deletedSinceEdit !== null ) {
2780                         return $this->deletedSinceEdit;
2781                 }
2782
2783                 $this->deletedSinceEdit = false;
2784
2785                 if ( $this->mTitle->isDeletedQuick() ) {
2786                         $this->lastDelete = $this->getLastDelete();
2787                         if ( $this->lastDelete ) {
2788                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
2789                                 if ( $deleteTime > $this->starttime ) {
2790                                         $this->deletedSinceEdit = true;
2791                                 }
2792                         }
2793                 }
2794
2795                 return $this->deletedSinceEdit;
2796         }
2797
2798         protected function getLastDelete() {
2799                 $dbr = wfGetDB( DB_SLAVE );
2800                 $data = $dbr->selectRow(
2801                         array( 'logging', 'user' ),
2802                         array( 'log_type',
2803                                    'log_action',
2804                                    'log_timestamp',
2805                                    'log_user',
2806                                    'log_namespace',
2807                                    'log_title',
2808                                    'log_comment',
2809                                    'log_params',
2810                                    'log_deleted',
2811                                    'user_name' ),
2812                         array( 'log_namespace' => $this->mTitle->getNamespace(),
2813                                    'log_title' => $this->mTitle->getDBkey(),
2814                                    'log_type' => 'delete',
2815                                    'log_action' => 'delete',
2816                                    'user_id=log_user' ),
2817                         __METHOD__,
2818                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
2819                 );
2820                 // Quick paranoid permission checks...
2821                 if ( is_object( $data ) ) {
2822                         if ( $data->log_deleted & LogPage::DELETED_USER )
2823                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
2824                         if ( $data->log_deleted & LogPage::DELETED_COMMENT )
2825                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
2826                 }
2827                 return $data;
2828         }
2829
2830         /**
2831          * Get the rendered text for previewing.
2832          * @throws MWException
2833          * @return string
2834          */
2835         function getPreviewText() {
2836                 global $wgOut, $wgUser, $wgParser, $wgRawHtml, $wgLang;
2837
2838                 wfProfileIn( __METHOD__ );
2839
2840                 if ( $wgRawHtml && !$this->mTokenOk ) {
2841                         // Could be an offsite preview attempt. This is very unsafe if
2842                         // HTML is enabled, as it could be an attack.
2843                         $parsedNote = '';
2844                         if ( $this->textbox1 !== '' ) {
2845                                 // Do not put big scary notice, if previewing the empty
2846                                 // string, which happens when you initially edit
2847                                 // a category page, due to automatic preview-on-open.
2848                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
2849                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
2850                         }
2851                         wfProfileOut( __METHOD__ );
2852                         return $parsedNote;
2853                 }
2854
2855                 $note = '';
2856
2857                 try {
2858                         $content = $this->toEditContent( $this->textbox1 );
2859
2860                         if ( $this->mTriedSave && !$this->mTokenOk ) {
2861                                 if ( $this->mTokenOkExceptSuffix ) {
2862                                         $note = wfMessage( 'token_suffix_mismatch' )->plain() ;
2863
2864                                 } else {
2865                                         $note = wfMessage( 'session_fail_preview' )->plain() ;
2866                                 }
2867                         } elseif ( $this->incompleteForm ) {
2868                                 $note = wfMessage( 'edit_form_incomplete' )->plain() ;
2869                         } else {
2870                                 $note = wfMessage( 'previewnote' )->plain() .
2871                                         ' [[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' . wfMessage( 'continue-editing' )->text() . ']]';
2872                         }
2873
2874                         $parserOptions = $this->mArticle->makeParserOptions( $this->mArticle->getContext() );
2875                         $parserOptions->setEditSection( false );
2876                         $parserOptions->setIsPreview( true );
2877                         $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
2878
2879                         # don't parse non-wikitext pages, show message about preview
2880                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
2881                                 if( $this->mTitle->isCssJsSubpage() ) {
2882                                         $level = 'user';
2883                                 } elseif( $this->mTitle->isCssOrJsPage() ) {
2884                                         $level = 'site';
2885                                 } else {
2886                                         $level = false;
2887                                 }
2888
2889                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
2890                                         $format = 'css';
2891                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
2892                                         $format = 'js';
2893                                 } else {
2894                                         $format = false;
2895                                 }
2896
2897                                 # Used messages to make sure grep find them:
2898                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
2899                                 if( $level && $format ) {
2900                                         $note = "<div id='mw-{$level}{$format}preview'>" . wfMessage( "{$level}{$format}preview" )->text()  . "</div>";
2901                                 } else {
2902                                         $note = wfMessage( 'previewnote' )->text() ;
2903                                 }
2904                         } else {
2905                                 $note = wfMessage( 'previewnote' )->text() ;
2906                         }
2907
2908                         $rt = $content->getRedirectChain();
2909                         if ( $rt ) {
2910                                 $previewHTML = $this->mArticle->viewRedirect( $rt, false );
2911                         } else {
2912
2913                                 # If we're adding a comment, we need to show the
2914                                 # summary as the headline
2915                                 if ( $this->section === "new" && $this->summary !== "" ) {
2916                                         $content = $content->addSectionHeader( $this->summary );
2917                                 }
2918
2919                                 $hook_args = array( $this, &$content );
2920                                 ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
2921                                 wfRunHooks( 'EditPageGetPreviewContent', $hook_args );
2922
2923                                 $parserOptions->enableLimitReport();
2924
2925                                 # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
2926                                 # But it's now deprecated, so never mind
2927
2928                                 $content = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
2929                                 $parserOutput = $content->getParserOutput( $this->getArticle()->getTitle(), null, $parserOptions );
2930
2931                                 $previewHTML = $parserOutput->getText();
2932                                 $this->mParserOutput = $parserOutput;
2933                                 $wgOut->addParserOutputNoText( $parserOutput );
2934
2935                                 if ( count( $parserOutput->getWarnings() ) ) {
2936                                         $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
2937                                 }
2938                         }
2939                 } catch ( MWContentSerializationException $ex ) {
2940                         $m = wfMessage('content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
2941                         $note .= "\n\n" . $m->parse();
2942                         $previewHTML = '';
2943                 }
2944
2945                 if ( $this->isConflict ) {
2946                         $conflict = '<h2 id="mw-previewconflict">' . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
2947                 } else {
2948                         $conflict = '<hr />';
2949                 }
2950
2951                 $previewhead = "<div class='previewnote'>\n" .
2952                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
2953                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
2954
2955                 $pageLang = $this->mTitle->getPageLanguage();
2956                 $attribs = array( 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
2957                         'class' => 'mw-content-' . $pageLang->getDir() );
2958                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
2959
2960                 wfProfileOut( __METHOD__ );
2961                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
2962         }
2963
2964         /**
2965          * @return Array
2966          */
2967         function getTemplates() {
2968                 if ( $this->preview || $this->section != '' ) {
2969                         $templates = array();
2970                         if ( !isset( $this->mParserOutput ) ) {
2971                                 return $templates;
2972                         }
2973                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
2974                                 foreach ( array_keys( $template ) as $dbk ) {
2975                                         $templates[] = Title::makeTitle( $ns, $dbk );
2976                                 }
2977                         }
2978                         return $templates;
2979                 } else {
2980                         return $this->mTitle->getTemplateLinksFrom();
2981                 }
2982         }
2983
2984         /**
2985          * Shows a bulletin board style toolbar for common editing functions.
2986          * It can be disabled in the user preferences.
2987          * The necessary JavaScript code can be found in skins/common/edit.js.
2988          *
2989          * @return string
2990          */
2991         static function getEditToolbar() {
2992                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
2993                 global $wgUseTeX, $wgEnableUploads, $wgForeignFileRepos;
2994
2995                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
2996
2997                 /**
2998                  * $toolarray is an array of arrays each of which includes the
2999                  * filename of the button image (without path), the opening
3000                  * tag, the closing tag, optionally a sample text that is
3001                  * inserted between the two when no selection is highlighted
3002                  * and.  The tip text is shown when the user moves the mouse
3003                  * over the button.
3004                  *
3005                  * Also here: accesskeys (key), which are not used yet until
3006                  * someone can figure out a way to make them work in
3007                  * IE. However, we should make sure these keys are not defined
3008                  * on the edit page.
3009                  */
3010                 $toolarray = array(
3011                         array(
3012                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
3013                                 'id'     => 'mw-editbutton-bold',
3014                                 'open'   => '\'\'\'',
3015                                 'close'  => '\'\'\'',
3016                                 'sample' => wfMessage( 'bold_sample' )->text(),
3017                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3018                                 'key'    => 'B'
3019                         ),
3020                         array(
3021                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
3022                                 'id'     => 'mw-editbutton-italic',
3023                                 'open'   => '\'\'',
3024                                 'close'  => '\'\'',
3025                                 'sample' => wfMessage( 'italic_sample' )->text(),
3026                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3027                                 'key'    => 'I'
3028                         ),
3029                         array(
3030                                 'image'  => $wgLang->getImageFile( 'button-link' ),
3031                                 'id'     => 'mw-editbutton-link',
3032                                 'open'   => '[[',
3033                                 'close'  => ']]',
3034                                 'sample' => wfMessage( 'link_sample' )->text(),
3035                                 'tip'    => wfMessage( 'link_tip' )->text(),
3036                                 'key'    => 'L'
3037                         ),
3038                         array(
3039                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
3040                                 'id'     => 'mw-editbutton-extlink',
3041                                 'open'   => '[',
3042                                 'close'  => ']',
3043                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3044                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3045                                 'key'    => 'X'
3046                         ),
3047                         array(
3048                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
3049                                 'id'     => 'mw-editbutton-headline',
3050                                 'open'   => "\n== ",
3051                                 'close'  => " ==\n",
3052                                 'sample' => wfMessage( 'headline_sample' )->text(),
3053                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3054                                 'key'    => 'H'
3055                         ),
3056                         $imagesAvailable ? array(
3057                                 'image'  => $wgLang->getImageFile( 'button-image' ),
3058                                 'id'     => 'mw-editbutton-image',
3059                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3060                                 'close'  => ']]',
3061                                 'sample' => wfMessage( 'image_sample' )->text(),
3062                                 'tip'    => wfMessage( 'image_tip' )->text(),
3063                                 'key'    => 'D',
3064                         ) : false,
3065                         $imagesAvailable ? array(
3066                                 'image'  => $wgLang->getImageFile( 'button-media' ),
3067                                 'id'     => 'mw-editbutton-media',
3068                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3069                                 'close'  => ']]',
3070                                 'sample' => wfMessage( 'media_sample' )->text(),
3071                                 'tip'    => wfMessage( 'media_tip' )->text(),
3072                                 'key'    => 'M'
3073                         ) : false,
3074                         $wgUseTeX ? array(
3075                                 'image'  => $wgLang->getImageFile( 'button-math' ),
3076                                 'id'     => 'mw-editbutton-math',
3077                                 'open'   => "<math>",
3078                                 'close'  => "</math>",
3079                                 'sample' => wfMessage( 'math_sample' )->text(),
3080                                 'tip'    => wfMessage( 'math_tip' )->text(),
3081                                 'key'    => 'C'
3082                         ) : false,
3083                         array(
3084                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
3085                                 'id'     => 'mw-editbutton-nowiki',
3086                                 'open'   => "<nowiki>",
3087                                 'close'  => "</nowiki>",
3088                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3089                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3090                                 'key'    => 'N'
3091                         ),
3092                         array(
3093                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
3094                                 'id'     => 'mw-editbutton-signature',
3095                                 'open'   => '--~~~~',
3096                                 'close'  => '',
3097                                 'sample' => '',
3098                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3099                                 'key'    => 'Y'
3100                         ),
3101                         array(
3102                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
3103                                 'id'     => 'mw-editbutton-hr',
3104                                 'open'   => "\n----\n",
3105                                 'close'  => '',
3106                                 'sample' => '',
3107                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3108                                 'key'    => 'R'
3109                         )
3110                 );
3111
3112                 $script = 'mw.loader.using("mediawiki.action.edit", function() {';
3113                 foreach ( $toolarray as $tool ) {
3114                         if ( !$tool ) {
3115                                 continue;
3116                         }
3117
3118                         $params = array(
3119                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
3120                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3121                                 // Older browsers show a "speedtip" type message only for ALT.
3122                                 // Ideally these should be different, realistically they
3123                                 // probably don't need to be.
3124                                 $tip = $tool['tip'],
3125                                 $open = $tool['open'],
3126                                 $close = $tool['close'],
3127                                 $sample = $tool['sample'],
3128                                 $cssId = $tool['id'],
3129                         );
3130
3131                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
3132                 }
3133
3134                 // This used to be called on DOMReady from mediawiki.action.edit, which
3135                 // ended up causing race conditions with the setup code above.
3136                 $script .= "\n" .
3137                         "// Create button bar\n" .
3138                         "$(function() { mw.toolbar.init(); } );\n";
3139
3140                 $script .= '});';
3141                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3142
3143                 $toolbar = '<div id="toolbar"></div>';
3144
3145                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3146
3147                 return $toolbar;
3148         }
3149
3150         /**
3151          * Returns an array of html code of the following checkboxes:
3152          * minor and watch
3153          *
3154          * @param $tabindex int Current tabindex
3155          * @param $checked Array of checkbox => bool, where bool indicates the checked
3156          *                 status of the checkbox
3157          *
3158          * @return array
3159          */
3160         public function getCheckboxes( &$tabindex, $checked ) {
3161                 global $wgUser;
3162
3163                 $checkboxes = array();
3164
3165                 // don't show the minor edit checkbox if it's a new page or section
3166                 if ( !$this->isNew ) {
3167                         $checkboxes['minor'] = '';
3168                         $minorLabel = wfMessage( 'minoredit' )->parse();
3169                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3170                                 $attribs = array(
3171                                         'tabindex'  => ++$tabindex,
3172                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3173                                         'id'        => 'wpMinoredit',
3174                                 );
3175                                 $checkboxes['minor'] =
3176                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3177                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3178                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3179                                         ">{$minorLabel}</label>";
3180                         }
3181                 }
3182
3183                 $watchLabel = wfMessage( 'watchthis' )->parse();
3184                 $checkboxes['watch'] = '';
3185                 if ( $wgUser->isLoggedIn() ) {
3186                         $attribs = array(
3187                                 'tabindex'  => ++$tabindex,
3188                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3189                                 'id'        => 'wpWatchthis',
3190                         );
3191                         $checkboxes['watch'] =
3192                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3193                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3194                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3195                                 ">{$watchLabel}</label>";
3196                 }
3197                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3198                 return $checkboxes;
3199         }
3200
3201         /**
3202          * Returns an array of html code of the following buttons:
3203          * save, diff, preview and live
3204          *
3205          * @param $tabindex int Current tabindex
3206          *
3207          * @return array
3208          */
3209         public function getEditButtons( &$tabindex ) {
3210                 $buttons = array();
3211
3212                 $temp = array(
3213                         'id'        => 'wpSave',
3214                         'name'      => 'wpSave',
3215                         'type'      => 'submit',
3216                         'tabindex'  => ++$tabindex,
3217                         'value'     => wfMessage( 'savearticle' )->text(),
3218                         'accesskey' => wfMessage( 'accesskey-save' )->text(),
3219                         'title'     => wfMessage( 'tooltip-save' )->text() . ' [' . wfMessage( 'accesskey-save' )->text() . ']',
3220                 );
3221                 $buttons['save'] = Xml::element( 'input', $temp, '' );
3222
3223                 ++$tabindex; // use the same for preview and live preview
3224                 $temp = array(
3225                         'id'        => 'wpPreview',
3226                         'name'      => 'wpPreview',
3227                         'type'      => 'submit',
3228                         'tabindex'  => $tabindex,
3229                         'value'     => wfMessage( 'showpreview' )->text(),
3230                         'accesskey' => wfMessage( 'accesskey-preview' )->text(),
3231                         'title'     => wfMessage( 'tooltip-preview' )->text() . ' [' . wfMessage( 'accesskey-preview' )->text() . ']',
3232                 );
3233                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
3234                 $buttons['live'] = '';
3235
3236                 $temp = array(
3237                         'id'        => 'wpDiff',
3238                         'name'      => 'wpDiff',
3239                         'type'      => 'submit',
3240                         'tabindex'  => ++$tabindex,
3241                         'value'     => wfMessage( 'showdiff' )->text(),
3242                         'accesskey' => wfMessage( 'accesskey-diff' )->text(),
3243                         'title'     => wfMessage( 'tooltip-diff' )->text() . ' [' . wfMessage( 'accesskey-diff' )->text() . ']',
3244                 );
3245                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
3246
3247                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3248                 return $buttons;
3249         }
3250
3251         /**
3252          * Output preview text only. This can be sucked into the edit page
3253          * via JavaScript, and saves the server time rendering the skin as
3254          * well as theoretically being more robust on the client (doesn't
3255          * disturb the edit box's undo history, won't eat your text on
3256          * failure, etc).
3257          *
3258          * @todo This doesn't include category or interlanguage links.
3259          *       Would need to enhance it a bit, "<s>maybe wrap them in XML
3260          *       or something...</s>" that might also require more skin
3261          *       initialization, so check whether that's a problem.
3262          */
3263         function livePreview() {
3264                 global $wgOut;
3265                 $wgOut->disable();
3266                 header( 'Content-type: text/xml; charset=utf-8' );
3267                 header( 'Cache-control: no-cache' );
3268
3269                 $previewText = $this->getPreviewText();
3270                 #$categories = $skin->getCategoryLinks();
3271
3272                 $s =
3273                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3274                 Xml::tags( 'livepreview', null,
3275                         Xml::element( 'preview', null, $previewText )
3276                         #.      Xml::element( 'category', null, $categories )
3277                 );
3278                 echo $s;
3279         }
3280
3281         /**
3282          * Call the stock "user is blocked" page
3283          *
3284          * @deprecated in 1.19; throw an exception directly instead
3285          */
3286         function blockedPage() {
3287                 wfDeprecated( __METHOD__, '1.19' );
3288                 global $wgUser;
3289
3290                 throw new UserBlockedError( $wgUser->getBlock() );
3291         }
3292
3293         /**
3294          * Produce the stock "please login to edit pages" page
3295          *
3296          * @deprecated in 1.19; throw an exception directly instead
3297          */
3298         function userNotLoggedInPage() {
3299                 wfDeprecated( __METHOD__, '1.19' );
3300                 throw new PermissionsError( 'edit' );
3301         }
3302
3303         /**
3304          * Show an error page saying to the user that he has insufficient permissions
3305          * to create a new page
3306          *
3307          * @deprecated in 1.19; throw an exception directly instead
3308          */
3309         function noCreatePermission() {
3310                 wfDeprecated( __METHOD__, '1.19' );
3311                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
3312                 throw new PermissionsError( $permission );
3313         }
3314
3315         /**
3316          * Creates a basic error page which informs the user that
3317          * they have attempted to edit a nonexistent section.
3318          */
3319         function noSuchSectionPage() {
3320                 global $wgOut;
3321
3322                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3323
3324                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
3325                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
3326                 $wgOut->addHTML( $res );
3327
3328                 $wgOut->returnToMain( false, $this->mTitle );
3329         }
3330
3331         /**
3332          * Produce the stock "your edit contains spam" page
3333          *
3334          * @param $match string Text which triggered one or more filters
3335          * @deprecated since 1.17 Use method spamPageWithContent() instead
3336          */
3337         static function spamPage( $match = false ) {
3338                 wfDeprecated( __METHOD__, '1.17' );
3339
3340                 global $wgOut, $wgTitle;
3341
3342                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3343
3344                 $wgOut->addHTML( '<div id="spamprotected">' );
3345                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3346                 if ( $match ) {
3347                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3348                 }
3349                 $wgOut->addHTML( '</div>' );
3350
3351                 $wgOut->returnToMain( false, $wgTitle );
3352         }
3353
3354         /**
3355          * Show "your edit contains spam" page with your diff and text
3356          *
3357          * @param $match string|Array|bool Text (or array of texts) which triggered one or more filters
3358          */
3359         public function spamPageWithContent( $match = false ) {
3360                 global $wgOut, $wgLang;
3361                 $this->textbox2 = $this->textbox1;
3362
3363                 if( is_array( $match ) ){
3364                         $match = $wgLang->listToText( $match );
3365                 }
3366                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3367
3368                 $wgOut->addHTML( '<div id="spamprotected">' );
3369                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3370                 if ( $match ) {
3371                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3372                 }
3373                 $wgOut->addHTML( '</div>' );
3374
3375                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3376                 $this->showDiff();
3377
3378                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3379                 $this->showTextbox2();
3380
3381                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3382         }
3383
3384         /**
3385          * Format an anchor fragment as it would appear for a given section name
3386          * @param $text String
3387          * @return String
3388          * @private
3389          */
3390         function sectionAnchor( $text ) {
3391                 global $wgParser;
3392                 return $wgParser->guessSectionNameFromWikiText( $text );
3393         }
3394
3395         /**
3396          * Check if the browser is on a blacklist of user-agents known to
3397          * mangle UTF-8 data on form submission. Returns true if Unicode
3398          * should make it through, false if it's known to be a problem.
3399          * @return bool
3400          * @private
3401          */
3402         function checkUnicodeCompliantBrowser() {
3403                 global $wgBrowserBlackList, $wgRequest;
3404
3405                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
3406                 if ( $currentbrowser === false ) {
3407                         // No User-Agent header sent? Trust it by default...
3408                         return true;
3409                 }
3410
3411                 foreach ( $wgBrowserBlackList as $browser ) {
3412                         if ( preg_match( $browser, $currentbrowser ) ) {
3413                                 return false;
3414                         }
3415                 }
3416                 return true;
3417         }
3418
3419         /**
3420          * Filter an input field through a Unicode de-armoring process if it
3421          * came from an old browser with known broken Unicode editing issues.
3422          *
3423          * @param $request WebRequest
3424          * @param $field String
3425          * @return String
3426          * @private
3427          */
3428         function safeUnicodeInput( $request, $field ) {
3429                 $text = rtrim( $request->getText( $field ) );
3430                 return $request->getBool( 'safemode' )
3431                         ? $this->unmakesafe( $text )
3432                         : $text;
3433         }
3434
3435         /**
3436          * @param $request WebRequest
3437          * @param $text string
3438          * @return string
3439          */
3440         function safeUnicodeText( $request, $text ) {
3441                 $text = rtrim( $text );
3442                 return $request->getBool( 'safemode' )
3443                         ? $this->unmakesafe( $text )
3444                         : $text;
3445         }
3446
3447         /**
3448          * Filter an output field through a Unicode armoring process if it is
3449          * going to an old browser with known broken Unicode editing issues.
3450          *
3451          * @param $text String
3452          * @return String
3453          * @private
3454          */
3455         function safeUnicodeOutput( $text ) {
3456                 global $wgContLang;
3457                 $codedText = $wgContLang->recodeForEdit( $text );
3458                 return $this->checkUnicodeCompliantBrowser()
3459                         ? $codedText
3460                         : $this->makesafe( $codedText );
3461         }
3462
3463         /**
3464          * A number of web browsers are known to corrupt non-ASCII characters
3465          * in a UTF-8 text editing environment. To protect against this,
3466          * detected browsers will be served an armored version of the text,
3467          * with non-ASCII chars converted to numeric HTML character references.
3468          *
3469          * Preexisting such character references will have a 0 added to them
3470          * to ensure that round-trips do not alter the original data.
3471          *
3472          * @param $invalue String
3473          * @return String
3474          * @private
3475          */
3476         function makesafe( $invalue ) {
3477                 // Armor existing references for reversability.
3478                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
3479
3480                 $bytesleft = 0;
3481                 $result = "";
3482                 $working = 0;
3483                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3484                         $bytevalue = ord( $invalue[$i] );
3485                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
3486                                 $result .= chr( $bytevalue );
3487                                 $bytesleft = 0;
3488                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
3489                                 $working = $working << 6;
3490                                 $working += ( $bytevalue & 0x3F );
3491                                 $bytesleft--;
3492                                 if ( $bytesleft <= 0 ) {
3493                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3494                                 }
3495                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
3496                                 $working = $bytevalue & 0x1F;
3497                                 $bytesleft = 1;
3498                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
3499                                 $working = $bytevalue & 0x0F;
3500                                 $bytesleft = 2;
3501                         } else { // 1111 0xxx
3502                                 $working = $bytevalue & 0x07;
3503                                 $bytesleft = 3;
3504                         }
3505                 }
3506                 return $result;
3507         }
3508
3509         /**
3510          * Reverse the previously applied transliteration of non-ASCII characters
3511          * back to UTF-8. Used to protect data from corruption by broken web browsers
3512          * as listed in $wgBrowserBlackList.
3513          *
3514          * @param $invalue String
3515          * @return String
3516          * @private
3517          */
3518         function unmakesafe( $invalue ) {
3519                 $result = "";
3520                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3521                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
3522                                 $i += 3;
3523                                 $hexstring = "";
3524                                 do {
3525                                         $hexstring .= $invalue[$i];
3526                                         $i++;
3527                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
3528
3529                                 // Do some sanity checks. These aren't needed for reversability,
3530                                 // but should help keep the breakage down if the editor
3531                                 // breaks one of the entities whilst editing.
3532                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) and ( strlen( $hexstring ) <= 6 ) ) {
3533                                         $codepoint = hexdec( $hexstring );
3534                                         $result .= codepointToUtf8( $codepoint );
3535                                 } else {
3536                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
3537                                 }
3538                         } else {
3539                                 $result .= substr( $invalue, $i, 1 );
3540                         }
3541                 }
3542                 // reverse the transform that we made for reversability reasons.
3543                 return strtr( $result, array( "&#x0" => "&#x" ) );
3544         }
3545 }