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
 385                 # Show applicable editing introductions
 386                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 387                         $this->showIntro();
 388                 }
 389
 390                 # Attempt submission here.  This will check for edit conflicts,
 391                 # and redundantly check for locked database, blocked IPs, etc.
 392                 # that edit() already checked just in case someone tries to sneak
 393                 # in the back door with a hand-edited submission URL.
 394
 395                 if ( 'save' == $this->formtype ) {
 396                         if ( !$this->attemptSave() ) {
 397                                 wfProfileOut( __METHOD__ . "-business-end" );
 398                                 wfProfileOut( __METHOD__ );
 399                                 return;
 400                         }
 401                 }
 402
 403                 # First time through: get contents, set time for conflict
 404                 # checking, etc.
 405                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 406                         if ( $this->initialiseForm() === false ) {
 407                                 $this->noSuchSectionPage();
 408                                 wfProfileOut( __METHOD__ . "-business-end" );
 409                                 wfProfileOut( __METHOD__ );
 410                                 return;
 411                         }
 412
 413                         if ( !$this->mTitle->getArticleID() ) {
 414                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 415                         } else {
 416                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 417                         }
 418
 419                 }
 420
 421                 $this->showEditForm();
 422                 wfProfileOut( __METHOD__ . "-business-end" );
 423                 wfProfileOut( __METHOD__ );
 424         }
 425
 426         /**
 427          * @return array
 428          */
 429         protected function getEditPermissionErrors() {
 430                 global $wgUser;
 431                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 432                 # Can this title be created?
 433                 if ( !$this->mTitle->exists() ) {
 434                         $permErrors = array_merge( $permErrors,
 435                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 436                 }
 437                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 438                 $remove = array();
 439                 foreach ( $permErrors as $error ) {
 440                         if ( ( $this->preview || $this->diff ) &&
 441                                 ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' ) )
 442                         {
 443                                 $remove[] = $error;
 444                         }
 445                 }
 446                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 447                 return $permErrors;
 448         }
 449
 450         /**
 451          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 452          * but with the following differences:
 453          * - If redlink=1, the user will be redirected to the page
 454          * - If there is content to display or the error occurs while either saving,
 455          *   previewing or showing the difference, it will be a
 456          *   "View source for ..." page displaying the source code after the error message.
 457          *
 458          * @since 1.19
 459          * @param $permErrors Array of permissions errors, as returned by
 460          *                    Title::getUserPermissionsErrors().
 461          * @throws PermissionsError
 462          */
 463         protected function displayPermissionsError( array $permErrors ) {
 464                 global $wgRequest, $wgOut;
 465
 466                 if ( $wgRequest->getBool( 'redlink' ) ) {
 467                         // The edit page was reached via a red link.
 468                         // Redirect to the article page and let them click the edit tab if
 469                         // they really want a permission error.
 470                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 471                         return;
 472                 }
 473
 474                 $content = $this->getContentObject();
 475
 476                 # Use the normal message if there's nothing to display
 477                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 478                         $action = $this->mTitle->exists() ? 'edit' :
 479                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 480                         throw new PermissionsError( $action, $permErrors );
 481                 }
 482
 483                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 484                 $wgOut->setPageTitle( wfMessage( 'viewsource-title', $this->getContextTitle()->getPrefixedText() ) );
 485                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 486                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 487                 $wgOut->addHTML( "<hr />\n" );
 488
 489                 # If the user made changes, preserve them when showing the markup
 490                 # (This happens when a user is blocked during edit, for instance)
 491                 if ( !$this->firsttime ) {
 492                         $text = $this->textbox1;
 493                         $wgOut->addWikiMsg( 'viewyourtext' );
 494                 } else {
 495                         $text = $this->toEditText( $content );
 496                         $wgOut->addWikiMsg( 'viewsourcetext' );
 497                 }
 498
 499                 $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 500
 501                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 502                         Linker::formatTemplates( $this->getTemplates() ) ) );
 503
 504                 if ( $this->mTitle->exists() ) {
 505                         $wgOut->returnToMain( null, $this->mTitle );
 506                 }
 507         }
 508
 509         /**
 510          * Show a read-only error
 511          * Parameters are the same as OutputPage:readOnlyPage()
 512          * Redirect to the article page if redlink=1
 513          * @deprecated in 1.19; use displayPermissionsError() instead
 514          */
 515         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 516                 wfDeprecated( __METHOD__, '1.19' );
 517
 518                 global $wgRequest, $wgOut;
 519                 if ( $wgRequest->getBool( 'redlink' ) ) {
 520                         // The edit page was reached via a red link.
 521                         // Redirect to the article page and let them click the edit tab if
 522                         // they really want a permission error.
 523                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 524                 } else {
 525                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 526                 }
 527         }
 528
 529         /**
 530          * Should we show a preview when the edit form is first shown?
 531          *
 532          * @return bool
 533          */
 534         protected function previewOnOpen() {
 535                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 536                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 537                         // Explicit override from request
 538                         return true;
 539                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 540                         // Explicit override from request
 541                         return false;
 542                 } elseif ( $this->section == 'new' ) {
 543                         // Nothing *to* preview for new sections
 544                         return false;
 545                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 546                         // Standard preference behaviour
 547                         return true;
 548                 } elseif ( !$this->mTitle->exists() &&
 549                   isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] ) &&
 550                   $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 551                 {
 552                         // Categories are special
 553                         return true;
 554                 } else {
 555                         return false;
 556                 }
 557         }
 558
 559         /**
 560          * Checks whether the user entered a skin name in uppercase,
 561          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 562          *
 563          * @return bool
 564          */
 565         protected function isWrongCaseCssJsPage() {
 566                 if ( $this->mTitle->isCssJsSubpage() ) {
 567                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 568                         $skins = array_merge(
 569                                 array_keys( Skin::getSkinNames() ),
 570                                 array( 'common' )
 571                         );
 572                         return !in_array( $name, $skins )
 573                                 && in_array( strtolower( $name ), $skins );
 574                 } else {
 575                         return false;
 576                 }
 577         }
 578
 579         /**
 580          * Does this EditPage class support section editing?
 581          * This is used by EditPage subclasses to indicate their ui cannot handle section edits
 582          *
 583          * @return bool
 584          */
 585         protected function isSectionEditSupported() {
 586                 return true;
 587         }
 588
 589         /**
 590          * This function collects the form data and uses it to populate various member variables.
 591          * @param $request WebRequest
 592          */
 593         function importFormData( &$request ) {
 594                 global $wgContLang, $wgUser;
 595
 596                 wfProfileIn( __METHOD__ );
 597
 598                 # Section edit can come from either the form or a link
 599                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 600                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 601
 602                 if ( $request->wasPosted() ) {
 603                         # These fields need to be checked for encoding.
 604                         # Also remove trailing whitespace, but don't remove _initial_
 605                         # whitespace from the text boxes. This may be significant formatting.
 606                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 607                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 608                                 // Skip this if wpTextbox2 has input, it indicates that we came
 609                                 // from a conflict page with raw page text, not a custom form
 610                                 // modified by subclasses
 611                                 wfProfileIn( get_class( $this ) . "::importContentFormData" );
 612                                 $textbox1 = $this->importContentFormData( $request );
 613                                 if ( $textbox1 !== null ) {
 614                                         $this->textbox1 = $textbox1;
 615                                 }
 616
 617                                 wfProfileOut( get_class( $this ) . "::importContentFormData" );
 618                         }
 619
 620                         # Truncate for whole multibyte characters
 621                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 622
 623                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 624                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 625                         # section titles.
 626                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 627
 628                         # Treat sectiontitle the same way as summary.
 629                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 630                         # currently doing double duty as both edit summary and section title. Right now this
 631                         # is just to allow API edits to work around this limitation, but this should be
 632                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 633                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 634                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 635
 636                         $this->edittime = $request->getVal( 'wpEdittime' );
 637                         $this->starttime = $request->getVal( 'wpStarttime' );
 638
 639                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 640
 641                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 642                                 // wpTextbox1 field is missing, possibly due to being "too big"
 643                                 // according to some filter rules such as Suhosin's setting for
 644                                 // suhosin.request.max_value_length (d'oh)
 645                                 $this->incompleteForm = true;
 646                         } else {
 647                                 // edittime should be one of our last fields; if it's missing,
 648                                 // the submission probably broke somewhere in the middle.
 649                                 $this->incompleteForm = is_null( $this->edittime );
 650                         }
 651                         if ( $this->incompleteForm ) {
 652                                 # If the form is incomplete, force to preview.
 653                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 654                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 655                                 $this->preview = true;
 656                         } else {
 657                                 /* Fallback for live preview */
 658                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 659                                 $this->diff = $request->getCheck( 'wpDiff' );
 660
 661                                 // Remember whether a save was requested, so we can indicate
 662                                 // if we forced preview due to session failure.
 663                                 $this->mTriedSave = !$this->preview;
 664
 665                                 if ( $this->tokenOk( $request ) ) {
 666                                         # Some browsers will not report any submit button
 667                                         # if the user hits enter in the comment box.
 668                                         # The unmarked state will be assumed to be a save,
 669                                         # if the form seems otherwise complete.
 670                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 671                                 } elseif ( $this->diff ) {
 672                                         # Failed token check, but only requested "Show Changes".
 673                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 674                                 } else {
 675                                         # Page might be a hack attempt posted from
 676                                         # an external site. Preview instead of saving.
 677                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 678                                         $this->preview = true;
 679                                 }
 680                         }
 681                         $this->save = !$this->preview && !$this->diff;
 682                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 683                                 $this->edittime = null;
 684                         }
 685
 686                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 687                                 $this->starttime = null;
 688                         }
 689
 690                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 691
 692                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 693                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 694
 695                         # Don't force edit summaries when a user is editing their own user or talk page
 696                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 697                                 $this->mTitle->getText() == $wgUser->getName() )
 698                         {
 699                                 $this->allowBlankSummary = true;
 700                         } else {
 701                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary' );
 702                         }
 703
 704                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 705                 } else {
 706                         # Not a posted form? Start with nothing.
 707                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 708                         $this->textbox1     = '';
 709                         $this->summary      = '';
 710                         $this->sectiontitle = '';
 711                         $this->edittime     = '';
 712                         $this->starttime    = wfTimestampNow();
 713                         $this->edit         = false;
 714                         $this->preview      = false;
 715                         $this->save         = false;
 716                         $this->diff         = false;
 717                         $this->minoredit    = false;
 718                         $this->watchthis    = $request->getBool( 'watchthis', false ); // Watch may be overriden by request parameters
 719                         $this->recreate     = false;
 720
 721                         // When creating a new section, we can preload a section title by passing it as the
 722                         // preloadtitle parameter in the URL (Bug 13100)
 723                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 724                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 725                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 726                                 $this->summary = $request->getVal( 'preloadtitle' );
 727                         }
 728                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 729                                 $this->summary = $request->getText( 'summary' );
 730                                 if ( $this->summary !== '' ) {
 731                                         $this->hasPresetSummary = true;
 732                                 }
 733                         }
 734
 735                         if ( $request->getVal( 'minor' ) ) {
 736                                 $this->minoredit = true;
 737                         }
 738                 }
 739
 740                 $this->oldid = $request->getInt( 'oldid' );
 741
 742                 $this->bot = $request->getBool( 'bot', true );
 743                 $this->nosummary = $request->getBool( 'nosummary' );
 744
 745                 $content_handler = ContentHandler::getForTitle( $this->mTitle );
 746                 $this->contentModel = $request->getText( 'model', $content_handler->getModelID() ); #may be overridden by revision
 747                 $this->contentFormat = $request->getText( 'format', $content_handler->getDefaultFormat() ); #may be overridden by revision
 748
 749                 #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
 750                 #TODO: check if the desired content model supports the given content format!
 751
 752                 $this->live = $request->getCheck( 'live' );
 753                 $this->editintro = $request->getText( 'editintro',
 754                         // Custom edit intro for new sections
 755                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 756
 757                 // Allow extensions to modify form data
 758                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 759
 760                 wfProfileOut( __METHOD__ );
 761         }
 762
 763         /**
 764          * Subpage overridable method for extracting the page content data from the
 765          * posted form to be placed in $this->textbox1, if using customized input
 766          * this method should be overrided and return the page text that will be used
 767          * for saving, preview parsing and so on...
 768          *
 769          * @param $request WebRequest
 770          */
 771         protected function importContentFormData( &$request ) {
 772                 return; // Don't do anything, EditPage already extracted wpTextbox1
 773         }
 774
 775         /**
 776          * Initialise form fields in the object
 777          * Called on the first invocation, e.g. when a user clicks an edit link
 778          * @return bool -- if the requested section is valid
 779          */
 780         function initialiseForm() {
 781                 global $wgUser;
 782                 $this->edittime = $this->mArticle->getTimestamp();
 783
 784                 $content = $this->getContentObject( false ); #TODO: track content object?!
 785                 if ( $content === false ) {
 786                         return false;
 787                 }
 788                 $this->textbox1 = $this->toEditText( $content );
 789
 790                 // activate checkboxes if user wants them to be always active
 791                 # Sort out the "watch" checkbox
 792                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 793                         # Watch all edits
 794                         $this->watchthis = true;
 795                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 796                         # Watch creations
 797                         $this->watchthis = true;
 798                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
 799                         # Already watched
 800                         $this->watchthis = true;
 801                 }
 802                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 803                         $this->minoredit = true;
 804                 }
 805                 if ( $this->textbox1 === false ) {
 806                         return false;
 807                 }
 808                 wfProxyCheck();
 809                 return true;
 810         }
 811
 812         /**
 813          * Fetch initial editing page content.
 814          *
 815          * @param $def_text string|bool
 816          * @return mixed string on success, $def_text for invalid sections
 817          * @private
 818          * @deprecated since 1.21, get WikiPage::getContent() instead.
 819          */
 820         function getContent( $def_text = false ) {
 821                 ContentHandler::deprecated( __METHOD__, '1.21' );
 822
 823                 if ( $def_text !== null && $def_text !== false && $def_text !== '' ) {
 824                         $def_content = $this->toEditContent( $def_text );
 825                 } else {
 826                         $def_content = false;
 827                 }
 828
 829                 $content = $this->getContentObject( $def_content );
 830
 831                 // Note: EditPage should only be used with text based content anyway.
 832                 return $this->toEditText( $content );
 833         }
 834
 835         /**
 836          * @param Content|null $def_content The default value to return
 837          *
 838          * @return mixed Content on success, $def_content for invalid sections
 839          *
 840          * @since 1.21
 841          */
 842         protected function getContentObject( $def_content = null ) {
 843                 global $wgOut, $wgRequest;
 844
 845                 wfProfileIn( __METHOD__ );
 846
 847                 $content = false;
 848
 849                 // For message page not locally set, use the i18n message.
 850                 // For other non-existent articles, use preload text if any.
 851                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
 852                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
 853                                 # If this is a system message, get the default text.
 854                                 $msg = $this->mTitle->getDefaultMessageText();
 855
 856                                 $content = $this->toEditContent( $msg );
 857                         }
 858                         if ( $content === false ) {
 859                                 # If requested, preload some text.
 860                                 $preload = $wgRequest->getVal( 'preload',
 861                                         // Custom preload text for new sections
 862                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 863
 864                                 $content = $this->getPreloadedContent( $preload );
 865                         }
 866                 // For existing pages, get text based on "undo" or section parameters.
 867                 } else {
 868                         if ( $this->section != '' ) {
 869                                 // Get section edit text (returns $def_text for invalid sections)
 870                                 $orig = $this->getOriginalContent();
 871                                 $content = $orig ? $orig->getSection( $this->section ) : null;
 872
 873                                 if ( !$content ) $content = $def_content;
 874                         } else {
 875                                 $undoafter = $wgRequest->getInt( 'undoafter' );
 876                                 $undo = $wgRequest->getInt( 'undo' );
 877
 878                                 if ( $undo > 0 && $undoafter > 0 ) {
 879                                         if ( $undo < $undoafter ) {
 880                                                 # If they got undoafter and undo round the wrong way, switch them
 881                                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 882                                         }
 883
 884                                         $undorev = Revision::newFromId( $undo );
 885                                         $oldrev = Revision::newFromId( $undoafter );
 886
 887                                         # Sanity check, make sure it's the right page,
 888                                         # the revisions exist and they were not deleted.
 889                                         # Otherwise, $content will be left as-is.
 890                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 891                                                 $undorev->getPage() == $oldrev->getPage() &&
 892                                                 $undorev->getPage() == $this->mTitle->getArticleID() &&
 893                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 894                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 895
 896                                                 $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
 897
 898                                                 if ( $content === false ) {
 899                                                         # Warn the user that something went wrong
 900                                                         $undoMsg = 'failure';
 901                                                 } else {
 902                                                         # Inform the user of our success and set an automatic edit summary
 903                                                         $undoMsg = 'success';
 904
 905                                                         # If we just undid one rev, use an autosummary
 906                                                         $firstrev = $oldrev->getNext();
 907                                                         if ( $firstrev && $firstrev->getId() == $undo ) {
 908                                                                 $undoSummary = wfMessage( 'undo-summary', $undo, $undorev->getUserText() )->inContentLanguage()->text();
 909                                                                 if ( $this->summary === '' ) {
 910                                                                         $this->summary = $undoSummary;
 911                                                                 } else {
 912                                                                         $this->summary = $undoSummary . wfMessage( 'colon-separator' )
 913                                                                                 ->inContentLanguage()->text() . $this->summary;
 914                                                                 }
 915                                                                 $this->undidRev = $undo;
 916                                                         }
 917                                                         $this->formtype = 'diff';
 918                                                 }
 919                                         } else {
 920                                                 // Failed basic sanity checks.
 921                                                 // Older revisions may have been removed since the link
 922                                                 // was created, or we may simply have got bogus input.
 923                                                 $undoMsg = 'norev';
 924                                         }
 925
 926                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
 927                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
 928                                                 wfMessage( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
 929                                 }
 930
 931                                 if ( $content === false ) {
 932                                         $content = $this->getOriginalContent();
 933                                 }
 934                         }
 935                 }
 936
 937                 wfProfileOut( __METHOD__ );
 938                 return $content;
 939         }
 940
 941         /**
 942          * Get the content of the wanted revision, without section extraction.
 943          *
 944          * The result of this function can be used to compare user's input with
 945          * section replaced in its context (using WikiPage::replaceSection())
 946          * to the original text of the edit.
 947          *
 948          * This difers from Article::getContent() that when a missing revision is
 949          * encountered the result will be null and not the
 950          * 'missing-revision' message.
 951          *
 952          * @since 1.19
 953          * @return Content|null
 954          */
 955         private function getOriginalContent() {
 956                 if ( $this->section == 'new' ) {
 957                         return $this->getCurrentContent();
 958                 }
 959                 $revision = $this->mArticle->getRevisionFetched();
 960                 if ( $revision === null ) {
 961                         if ( !$this->contentModel ) $this->contentModel = $this->getTitle()->getContentModel();
 962                         $handler = ContentHandler::getForModelID( $this->contentModel );
 963
 964                         return $handler->makeEmptyContent();
 965                 }
 966                 $content = $revision->getContent();
 967                 return $content;
 968         }
 969
 970         /**
 971          * Get the current content of the page. This is basically similar to
 972          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
 973          * content object is returned instead of null.
 974          *
 975          * @since 1.21
 976          * @return Content
 977          */
 978         protected function getCurrentContent() {
 979                 $rev = $this->mArticle->getRevision();
 980                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
 981
 982                 if ( $content  === false || $content === null ) {
 983                         if ( !$this->contentModel ) $this->contentModel = $this->getTitle()->getContentModel();
 984                         $handler = ContentHandler::getForModelID( $this->contentModel );
 985
 986                         return $handler->makeEmptyContent();
 987                 } else {
 988                         # nasty side-effect, but needed for consistency
 989                         $this->contentModel = $rev->getContentModel();
 990                         $this->contentFormat = $rev->getContentFormat();
 991
 992                         return $content;
 993                 }
 994         }
 995
 996
 997         /**
 998          * Use this method before edit() to preload some text into the edit box
 999          *
1000          * @param $text string
1001          * @deprecated since 1.21, use setPreloadedContent() instead.
1002          */
1003         public function setPreloadedText( $text ) {
1004                 ContentHandler::deprecated( __METHOD__, "1.21" );
1005
1006                 $content = $this->toEditContent( $text );
1007
1008                 $this->setPreloadedContent( $content );
1009         }
1010
1011         /**
1012          * Use this method before edit() to preload some content into the edit box
1013          *
1014          * @param $content Content
1015          *
1016          * @since 1.21
1017          */
1018         public function setPreloadedContent( Content $content ) {
1019                 $this->mPreloadContent = $content;
1020         }
1021
1022         /**
1023          * Get the contents to be preloaded into the box, either set by
1024          * an earlier setPreloadText() or by loading the given page.
1025          *
1026          * @param $preload String: representing the title to preload from.
1027          *
1028          * @return String
1029          *
1030          * @deprecated since 1.21, use getPreloadedContent() instead
1031          */
1032         protected function getPreloadedText( $preload ) {
1033                 ContentHandler::deprecated( __METHOD__, "1.21" );
1034
1035                 $content = $this->getPreloadedContent( $preload );
1036                 $text = $this->toEditText( $content );
1037
1038                 return $text;
1039         }
1040
1041         /**
1042          * Get the contents to be preloaded into the box, either set by
1043          * an earlier setPreloadText() or by loading the given page.
1044          *
1045          * @param $preload String: representing the title to preload from.
1046          *
1047          * @return Content
1048          *
1049          * @since 1.21
1050          */
1051         protected function getPreloadedContent( $preload ) {
1052                 global $wgUser;
1053
1054                 if ( !empty( $this->mPreloadContent ) ) {
1055                         return $this->mPreloadContent;
1056                 }
1057
1058                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1059
1060                 if ( $preload === '' ) {
1061                         return $handler->makeEmptyContent();
1062                 }
1063
1064                 $title = Title::newFromText( $preload );
1065                 # Check for existence to avoid getting MediaWiki:Noarticletext
1066                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1067                         //TODO: somehow show a warning to the user!
1068                         return $handler->makeEmptyContent();
1069                 }
1070
1071                 $page = WikiPage::factory( $title );
1072                 if ( $page->isRedirect() ) {
1073                         $title = $page->getRedirectTarget();
1074                         # Same as before
1075                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1076                                 //TODO: somehow show a warning to the user!
1077                                 return $handler->makeEmptyContent();
1078                         }
1079                         $page = WikiPage::factory( $title );
1080                 }
1081
1082                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1083                 $content = $page->getContent( Revision::RAW );
1084
1085                 if ( !$content ) {
1086                         //TODO: somehow show a warning to the user!
1087                         return $handler->makeEmptyContent();
1088                 }
1089
1090                 if ( $content->getModel() !== $handler->getModelID() ) {
1091                         $converted = $content->convert( $handler->getModelID() );
1092
1093                         if ( !$converted ) {
1094                                 //TODO: somehow show a warning to the user!
1095                                 wfDebug( "Attempt to preload incompatible content: "
1096                                                 . "can't convert " . $content->getModel()
1097                                                 . " to " . $handler->getModelID() );
1098
1099                                 return $handler->makeEmptyContent();
1100                         }
1101
1102                         $content = $converted;
1103                 }
1104
1105                 return $content->preloadTransform( $title, $parserOptions );
1106         }
1107
1108         /**
1109          * Make sure the form isn't faking a user's credentials.
1110          *
1111          * @param $request WebRequest
1112          * @return bool
1113          * @private
1114          */
1115         function tokenOk( &$request ) {
1116                 global $wgUser;
1117                 $token = $request->getVal( 'wpEditToken' );
1118                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1119                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1120                 return $this->mTokenOk;
1121         }
1122
1123         /**
1124          * Attempt submission
1125          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1126          * @return bool false if output is done, true if the rest of the form should be displayed
1127          */
1128         function attemptSave() {
1129                 global $wgUser, $wgOut;
1130
1131                 $resultDetails = false;
1132                 # Allow bots to exempt some edits from bot flagging
1133                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1134                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1135                 // FIXME: once the interface for internalAttemptSave() is made nicer, this should use the message in $status
1136                 if ( $status->value == self::AS_SUCCESS_UPDATE || $status->value == self::AS_SUCCESS_NEW_ARTICLE ) {
1137                         $this->didSave = true;
1138                 }
1139
1140                 switch ( $status->value ) {
1141                         case self::AS_HOOK_ERROR_EXPECTED:
1142                         case self::AS_CONTENT_TOO_BIG:
1143                         case self::AS_ARTICLE_WAS_DELETED:
1144                         case self::AS_CONFLICT_DETECTED:
1145                         case self::AS_SUMMARY_NEEDED:
1146                         case self::AS_TEXTBOX_EMPTY:
1147                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1148                         case self::AS_END:
1149                                 return true;
1150
1151                         case self::AS_HOOK_ERROR:
1152                                 return false;
1153
1154                         case self::AS_PARSE_ERROR:
1155                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>');
1156                                 return true;
1157
1158                         case self::AS_SUCCESS_NEW_ARTICLE:
1159                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1160                                 $anchor = isset ( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1161                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1162                                 return false;
1163
1164                         case self::AS_SUCCESS_UPDATE:
1165                                 $extraQuery = '';
1166                                 $sectionanchor = $resultDetails['sectionanchor'];
1167
1168                                 // Give extensions a chance to modify URL query on update
1169                                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this->mArticle, &$sectionanchor, &$extraQuery ) );
1170
1171                                 if ( $resultDetails['redirect'] ) {
1172                                         if ( $extraQuery == '' ) {
1173                                                 $extraQuery = 'redirect=no';
1174                                         } else {
1175                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1176                                         }
1177                                 }
1178                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1179                                 return false;
1180
1181                         case self::AS_BLANK_ARTICLE:
1182                                 $wgOut->redirect( $this->getContextTitle()->getFullURL() );
1183                                 return false;
1184
1185                         case self::AS_SPAM_ERROR:
1186                                 $this->spamPageWithContent( $resultDetails['spam'] );
1187                                 return false;
1188
1189                         case self::AS_BLOCKED_PAGE_FOR_USER:
1190                                 throw new UserBlockedError( $wgUser->getBlock() );
1191
1192                         case self::AS_IMAGE_REDIRECT_ANON:
1193                         case self::AS_IMAGE_REDIRECT_LOGGED:
1194                                 throw new PermissionsError( 'upload' );
1195
1196                         case self::AS_READ_ONLY_PAGE_ANON:
1197                         case self::AS_READ_ONLY_PAGE_LOGGED:
1198                                 throw new PermissionsError( 'edit' );
1199
1200                         case self::AS_READ_ONLY_PAGE:
1201                                 throw new ReadOnlyError;
1202
1203                         case self::AS_RATE_LIMITED:
1204                                 throw new ThrottledError();
1205
1206                         case self::AS_NO_CREATE_PERMISSION:
1207                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1208                                 throw new PermissionsError( $permission );
1209
1210                         default:
1211                                 // We don't recognize $status->value. The only way that can happen
1212                                 // is if an extension hook aborted from inside ArticleSave.
1213                                 // Render the status object into $this->hookError
1214                                 // FIXME this sucks, we should just use the Status object throughout
1215                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1216                                         '</div>';
1217                                 return true;
1218                 }
1219         }
1220
1221         /**
1222          * Attempt submission (no UI)
1223          *
1224          * @param $result
1225          * @param $bot bool
1226          *
1227          * @return Status object, possibly with a message, but always with one of the AS_* constants in $status->value,
1228          *
1229          * FIXME: This interface is TERRIBLE, but hard to get rid of due to various error display idiosyncrasies. There are
1230          * also lots of cases where error metadata is set in the object and retrieved later instead of being returned, e.g.
1231          * AS_CONTENT_TOO_BIG and AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some time.
1232          */
1233         function internalAttemptSave( &$result, $bot = false ) {
1234                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1235
1236                 $status = Status::newGood();
1237
1238                 wfProfileIn( __METHOD__ );
1239                 wfProfileIn( __METHOD__ . '-checks' );
1240
1241                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
1242                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1243                         $status->fatal( 'hookaborted' );
1244                         $status->value = self::AS_HOOK_ERROR;
1245                         wfProfileOut( __METHOD__ . '-checks' );
1246                         wfProfileOut( __METHOD__ );
1247                         return $status;
1248                 }
1249
1250                 try {
1251                         # Construct Content object
1252                         $textbox_content = $this->toEditContent( $this->textbox1 );
1253                 } catch ( MWContentSerializationException $ex ) {
1254                         $status->fatal( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
1255                         $status->value = self::AS_PARSE_ERROR;
1256                         wfProfileOut( __METHOD__ . '-checks' );
1257                         wfProfileOut( __METHOD__ );
1258                         return $status;
1259                 }
1260
1261                 # Check image redirect
1262                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1263                         $textbox_content->isRedirect() &&
1264                         !$wgUser->isAllowed( 'upload' ) ) {
1265                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1266                                 $status->setResult( false, $code );
1267
1268                                 wfProfileOut( __METHOD__ . '-checks' );
1269                                 wfProfileOut( __METHOD__ );
1270
1271                                 return $status;
1272                 }
1273
1274                 # Check for spam
1275                 $match = self::matchSummarySpamRegex( $this->summary );
1276                 if ( $match === false ) {
1277                         $match = self::matchSpamRegex( $this->textbox1 );
1278                 }
1279                 if ( $match !== false ) {
1280                         $result['spam'] = $match;
1281                         $ip = $wgRequest->getIP();
1282                         $pdbk = $this->mTitle->getPrefixedDBkey();
1283                         $match = str_replace( "\n", '', $match );
1284                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1285                         $status->fatal( 'spamprotectionmatch', $match );
1286                         $status->value = self::AS_SPAM_ERROR;
1287                         wfProfileOut( __METHOD__ . '-checks' );
1288                         wfProfileOut( __METHOD__ );
1289                         return $status;
1290                 }
1291                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
1292                         # Error messages etc. could be handled within the hook...
1293                         $status->fatal( 'hookaborted' );
1294                         $status->value = self::AS_HOOK_ERROR;
1295                         wfProfileOut( __METHOD__ . '-checks' );
1296                         wfProfileOut( __METHOD__ );
1297                         return $status;
1298                 } elseif ( $this->hookError != '' ) {
1299                         # ...or the hook could be expecting us to produce an error
1300                         $status->fatal( 'hookaborted' );
1301                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1302                         wfProfileOut( __METHOD__ . '-checks' );
1303                         wfProfileOut( __METHOD__ );
1304                         return $status;
1305                 }
1306
1307                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1308                         // Auto-block user's IP if the account was "hard" blocked
1309                         $wgUser->spreadAnyEditBlock();
1310                         # Check block state against master, thus 'false'.
1311                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1312                         wfProfileOut( __METHOD__ . '-checks' );
1313                         wfProfileOut( __METHOD__ );
1314                         return $status;
1315                 }
1316
1317                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1318                 if ( $this->kblength > $wgMaxArticleSize ) {
1319                         // Error will be displayed by showEditForm()
1320                         $this->tooBig = true;
1321                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1322                         wfProfileOut( __METHOD__ . '-checks' );
1323                         wfProfileOut( __METHOD__ );
1324                         return $status;
1325                 }
1326
1327                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1328                         if ( $wgUser->isAnon() ) {
1329                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1330                                 wfProfileOut( __METHOD__ . '-checks' );
1331                                 wfProfileOut( __METHOD__ );
1332                                 return $status;
1333                         } else {
1334                                 $status->fatal( 'readonlytext' );
1335                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1336                                 wfProfileOut( __METHOD__ . '-checks' );
1337                                 wfProfileOut( __METHOD__ );
1338                                 return $status;
1339                         }
1340                 }
1341
1342                 if ( wfReadOnly() ) {
1343                         $status->fatal( 'readonlytext' );
1344                         $status->value = self::AS_READ_ONLY_PAGE;
1345                         wfProfileOut( __METHOD__ . '-checks' );
1346                         wfProfileOut( __METHOD__ );
1347                         return $status;
1348                 }
1349                 if ( $wgUser->pingLimiter() ) {
1350                         $status->fatal( 'actionthrottledtext' );
1351                         $status->value = self::AS_RATE_LIMITED;
1352                         wfProfileOut( __METHOD__ . '-checks' );
1353                         wfProfileOut( __METHOD__ );
1354                         return $status;
1355                 }
1356
1357                 # If the article has been deleted while editing, don't save it without
1358                 # confirmation
1359                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1360                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1361                         wfProfileOut( __METHOD__ . '-checks' );
1362                         wfProfileOut( __METHOD__ );
1363                         return $status;
1364                 }
1365
1366                 wfProfileOut( __METHOD__ . '-checks' );
1367
1368                 # Load the page data from the master. If anything changes in the meantime,
1369                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1370                 $this->mArticle->loadPageData( 'fromdbmaster' );
1371                 $new = !$this->mArticle->exists();
1372
1373                 if ( $new ) {
1374                         // Late check for create permission, just in case *PARANOIA*
1375                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1376                                 $status->fatal( 'nocreatetext' );
1377                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1378                                 wfDebug( __METHOD__ . ": no create permission\n" );
1379                                 wfProfileOut( __METHOD__ );
1380                                 return $status;
1381                         }
1382
1383                         # Don't save a new article if it's blank.
1384                         if ( $this->textbox1 == '' ) {
1385                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1386                                 wfProfileOut( __METHOD__ );
1387                                 return $status;
1388                         }
1389
1390                         // Run post-section-merge edit filter
1391                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
1392                                 # Error messages etc. could be handled within the hook...
1393                                 $status->fatal( 'hookaborted' );
1394                                 $status->value = self::AS_HOOK_ERROR;
1395                                 wfProfileOut( __METHOD__ );
1396                                 return $status;
1397                         } elseif ( $this->hookError != '' ) {
1398                                 # ...or the hook could be expecting us to produce an error
1399                                 $status->fatal( 'hookaborted' );
1400                                 $status->value = self::AS_HOOK_ERROR_EXPECTED;
1401                                 wfProfileOut( __METHOD__ );
1402                                 return $status;
1403                         }
1404
1405                         $content = $textbox_content;
1406
1407                         $result['sectionanchor'] = '';
1408                         if ( $this->section == 'new' ) {
1409                                 if ( $this->sectiontitle !== '' ) {
1410                                         // Insert the section title above the content.
1411                                         $content = $content->addSectionHeader( $this->sectiontitle );
1412
1413                                         // Jump to the new section
1414                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1415
1416                                         // If no edit summary was specified, create one automatically from the section
1417                                         // title and have it link to the new section. Otherwise, respect the summary as
1418                                         // passed.
1419                                         if ( $this->summary === '' ) {
1420                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1421                                                 $this->summary = wfMessage( 'newsectionsummary' )
1422                                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1423                                         }
1424                                 } elseif ( $this->summary !== '' ) {
1425                                         // Insert the section title above the content.
1426                                         $content = $content->addSectionHeader( $this->summary );
1427
1428                                         // Jump to the new section
1429                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1430
1431                                         // Create a link to the new section from the edit summary.
1432                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1433                                         $this->summary = wfMessage( 'newsectionsummary' )
1434                                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1435                                 }
1436                         }
1437
1438                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1439
1440                 } else { # not $new
1441
1442                         # Article exists. Check for edit conflict.
1443
1444                         $this->mArticle->clear(); # Force reload of dates, etc.
1445                         $timestamp = $this->mArticle->getTimestamp();
1446
1447                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1448
1449                         if ( $timestamp != $this->edittime ) {
1450                                 $this->isConflict = true;
1451                                 if ( $this->section == 'new' ) {
1452                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1453                                                 $this->mArticle->getComment() == $this->summary ) {
1454                                                 // Probably a duplicate submission of a new comment.
1455                                                 // This can happen when squid resends a request after
1456                                                 // a timeout but the first one actually went through.
1457                                                 wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
1458                                         } else {
1459                                                 // New comment; suppress conflict.
1460                                                 $this->isConflict = false;
1461                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1462                                         }
1463                                 } elseif ( $this->section == '' && Revision::userWasLastToEdit( DB_MASTER,  $this->mTitle->getArticleID(),
1464                                                         $wgUser->getId(), $this->edittime ) ) {
1465                                         # Suppress edit conflict with self, except for section edits where merging is required.
1466                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1467                                         $this->isConflict = false;
1468                                 }
1469                         }
1470
1471                         // If sectiontitle is set, use it, otherwise use the summary as the section title (for
1472                         // backwards compatibility with old forms/bots).
1473                         if ( $this->sectiontitle !== '' ) {
1474                                 $sectionTitle = $this->sectiontitle;
1475                         } else {
1476                                 $sectionTitle = $this->summary;
1477                         }
1478
1479                         $content = null;
1480
1481                         if ( $this->isConflict ) {
1482                                 wfDebug( __METHOD__ . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1483                                                 . " (article time '{$timestamp}')\n" );
1484
1485                                 $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle, $this->edittime );
1486                         } else {
1487                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1488                                 $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle );
1489                         }
1490
1491                         if ( is_null( $content ) ) {
1492                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1493                                 $this->isConflict = true;
1494                                 $content = $textbox_content; // do not try to merge here!
1495                         } elseif ( $this->isConflict ) {
1496                                 # Attempt merge
1497                                 if ( $this->mergeChangesIntoContent( $content ) ) {
1498                                         // Successful merge! Maybe we should tell the user the good news?
1499                                         $this->isConflict = false;
1500                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1501                                 } else {
1502                                         $this->section = '';
1503                                         $this->textbox1 = ContentHandler::getContentText( $content );
1504                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1505                                 }
1506                         }
1507
1508                         if ( $this->isConflict ) {
1509                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1510                                 wfProfileOut( __METHOD__ );
1511                                 return $status;
1512                         }
1513
1514                         // Run post-section-merge edit filter
1515                         $hook_args = array( $this, $content, &$this->hookError, $this->summary );
1516
1517                         if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged', $hook_args )
1518                                 || !wfRunHooks( 'EditFilterMergedContent', $hook_args ) ) {
1519                                 # Error messages etc. could be handled within the hook...
1520                                 $status->fatal( 'hookaborted' );
1521                                 $status->value = self::AS_HOOK_ERROR;
1522                                 wfProfileOut( __METHOD__ );
1523                                 return $status;
1524                         } elseif ( $this->hookError != '' ) {
1525                                 # ...or the hook could be expecting us to produce an error
1526                                 $status->fatal( 'hookaborted' );
1527                                 $status->value = self::AS_HOOK_ERROR_EXPECTED;
1528                                 wfProfileOut( __METHOD__ );
1529                                 return $status;
1530                         }
1531
1532                         # Handle the user preference to force summaries here, but not for null edits
1533                         if ( $this->section != 'new' && !$this->allowBlankSummary
1534                                 && !$content->equals( $this->getOriginalContent() )
1535                                 && !$content->isRedirect() ) # check if it's not a redirect
1536                         {
1537                                 if ( md5( $this->summary ) == $this->autoSumm ) {
1538                                         $this->missingSummary = true;
1539                                         $status->fatal( 'missingsummary' );
1540                                         $status->value = self::AS_SUMMARY_NEEDED;
1541                                         wfProfileOut( __METHOD__ );
1542                                         return $status;
1543                                 }
1544                         }
1545
1546                         # And a similar thing for new sections
1547                         if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1548                                 if ( trim( $this->summary ) == '' ) {
1549                                         $this->missingSummary = true;
1550                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1551                                         $status->value = self::AS_SUMMARY_NEEDED;
1552                                         wfProfileOut( __METHOD__ );
1553                                         return $status;
1554                                 }
1555                         }
1556
1557                         # All's well
1558                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1559                         $sectionanchor = '';
1560                         if ( $this->section == 'new' ) {
1561                                 if ( $this->textbox1 == '' ) {
1562                                         $this->missingComment = true;
1563                                         $status->fatal( 'missingcommenttext' );
1564                                         $status->value = self::AS_TEXTBOX_EMPTY;
1565                                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1566                                         wfProfileOut( __METHOD__ );
1567                                         return $status;
1568                                 }
1569                                 if ( $this->sectiontitle !== '' ) {
1570                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1571                                         // If no edit summary was specified, create one automatically from the section
1572                                         // title and have it link to the new section. Otherwise, respect the summary as
1573                                         // passed.
1574                                         if ( $this->summary === '' ) {
1575                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1576                                                 $this->summary = wfMessage( 'newsectionsummary' )
1577                                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1578                                         }
1579                                 } elseif ( $this->summary !== '' ) {
1580                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1581                                         # This is a new section, so create a link to the new section
1582                                         # in the revision summary.
1583                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1584                                         $this->summary = wfMessage( 'newsectionsummary' )
1585                                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1586                                 }
1587                         } elseif ( $this->section != '' ) {
1588                                 # Try to get a section anchor from the section source, redirect to edited section if header found
1589                                 # XXX: might be better to integrate this into Article::replaceSection
1590                                 # for duplicate heading checking and maybe parsing
1591                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1592                                 # we can't deal with anchors, includes, html etc in the header for now,
1593                                 # headline would need to be parsed to improve this
1594                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1595                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1596                                 }
1597                         }
1598                         $result['sectionanchor'] = $sectionanchor;
1599                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1600
1601                         // Save errors may fall down to the edit form, but we've now
1602                         // merged the section into full text. Clear the section field
1603                         // so that later submission of conflict forms won't try to
1604                         // replace that into a duplicated mess.
1605                         $this->textbox1 = $this->toEditText( $content );
1606                         $this->section = '';
1607
1608                         $status->value = self::AS_SUCCESS_UPDATE;
1609                 }
1610
1611                 // Check for length errors again now that the section is merged in
1612                         $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1613                 if ( $this->kblength > $wgMaxArticleSize ) {
1614                         $this->tooBig = true;
1615                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1616                         wfProfileOut( __METHOD__ );
1617                         return $status;
1618                 }
1619
1620                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1621                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1622                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1623                         ( $bot ? EDIT_FORCE_BOT : 0 );
1624
1625                         $doEditStatus = $this->mArticle->doEditContent( $content, $this->summary, $flags,
1626                                                                                                                         false, null, $this->contentFormat );
1627
1628                 if ( $doEditStatus->isOK() ) {
1629                                 $result['redirect'] = $content->isRedirect();
1630                         $this->updateWatchlist();
1631                         wfProfileOut( __METHOD__ );
1632                         return $status;
1633                 } else {
1634                         // Failure from doEdit()
1635                         // Show the edit conflict page for certain recognized errors from doEdit(),
1636                         // but don't show it for errors from extension hooks
1637                         $errors = $doEditStatus->getErrorsArray();
1638                         if ( in_array( $errors[0][0], array( 'edit-gone-missing', 'edit-conflict',
1639                                 'edit-already-exists' ) ) )
1640                         {
1641                                 $this->isConflict = true;
1642                                 // Destroys data doEdit() put in $status->value but who cares
1643                                 $doEditStatus->value = self::AS_END;
1644                         }
1645                         wfProfileOut( __METHOD__ );
1646                         return $doEditStatus;
1647                 }
1648         }
1649
1650         /**
1651          * Register the change of watch status
1652          */
1653         protected function updateWatchlist() {
1654                 global $wgUser;
1655
1656                 if ( $wgUser->isLoggedIn() && $this->watchthis != $wgUser->isWatched( $this->mTitle ) ) {
1657                         $fname = __METHOD__;
1658                         $title = $this->mTitle;
1659                         $watch = $this->watchthis;
1660
1661                         // Do this in its own transaction to reduce contention...
1662                         $dbw = wfGetDB( DB_MASTER );
1663                         $dbw->onTransactionIdle( function() use ( $dbw, $title, $watch, $wgUser, $fname ) {
1664                                 $dbw->begin( $fname );
1665                                 if ( $watch ) {
1666                                         WatchAction::doWatch( $title, $wgUser );
1667                                 } else {
1668                                         WatchAction::doUnwatch( $title, $wgUser );
1669                                 }
1670                                 $dbw->commit( $fname );
1671                         } );
1672                 }
1673         }
1674
1675         /**
1676          * Attempts to merge text content with base and current revisions
1677          *
1678          * @param $editText string
1679          *
1680          * @return bool
1681          * @deprecated since 1.21, use mergeChangesIntoContent() instead
1682          */
1683         function mergeChangesInto( &$editText ){
1684                 ContentHandler::deprecated( __METHOD__, "1.21" );
1685
1686                 $editContent = $this->toEditContent( $editText );
1687
1688                 $ok = $this->mergeChangesIntoContent( $editContent );
1689
1690                 if ( $ok ) {
1691                         $editText = $this->toEditText( $editContent );
1692                         return true;
1693                 }
1694                 return false;
1695         }
1696
1697         /**
1698          * Attempts to do 3-way merge of edit content with a base revision
1699          * and current content, in case of edit conflict, in whichever way appropriate
1700          * for the content type.
1701          *
1702          * @since 1.21
1703          *
1704          * @param $editContent
1705          *
1706          * @return bool
1707          */
1708         private function mergeChangesIntoContent( &$editContent ){
1709                 wfProfileIn( __METHOD__ );
1710
1711                 $db = wfGetDB( DB_MASTER );
1712
1713                 // This is the revision the editor started from
1714                 $baseRevision = $this->getBaseRevision();
1715                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
1716
1717                 if ( is_null( $baseContent ) ) {
1718                         wfProfileOut( __METHOD__ );
1719                         return false;
1720                 }
1721
1722                 // The current state, we want to merge updates into it
1723                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1724                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
1725
1726                 if ( is_null( $currentContent ) ) {
1727                         wfProfileOut( __METHOD__ );
1728                         return false;
1729                 }
1730
1731                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
1732
1733                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
1734
1735                 if ( $result ) {
1736                         $editContent = $result;
1737                         wfProfileOut( __METHOD__ );
1738                         return true;
1739                 } else {
1740                         wfProfileOut( __METHOD__ );
1741                         return false;
1742                 }
1743         }
1744
1745         /**
1746          * @return Revision
1747          */
1748         function getBaseRevision() {
1749                 if ( !$this->mBaseRevision ) {
1750                         $db = wfGetDB( DB_MASTER );
1751                         $baseRevision = Revision::loadFromTimestamp(
1752                                 $db, $this->mTitle, $this->edittime );
1753                         return $this->mBaseRevision = $baseRevision;
1754                 } else {
1755                         return $this->mBaseRevision;
1756                 }
1757         }
1758
1759         /**
1760          * Check given input text against $wgSpamRegex, and return the text of the first match.
1761          *
1762          * @param $text string
1763          *
1764          * @return string|bool matching string or false
1765          */
1766         public static function matchSpamRegex( $text ) {
1767                 global $wgSpamRegex;
1768                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1769                 $regexes = (array)$wgSpamRegex;
1770                 return self::matchSpamRegexInternal( $text, $regexes );
1771         }
1772
1773         /**
1774          * Check given input text against $wgSpamRegex, and return the text of the first match.
1775          *
1776          * @param $text string
1777          *
1778          * @return string|bool  matching string or false
1779          */
1780         public static function matchSummarySpamRegex( $text ) {
1781                 global $wgSummarySpamRegex;
1782                 $regexes = (array)$wgSummarySpamRegex;
1783                 return self::matchSpamRegexInternal( $text, $regexes );
1784         }
1785
1786         /**
1787          * @param $text string
1788          * @param $regexes array
1789          * @return bool|string
1790          */
1791         protected static function matchSpamRegexInternal( $text, $regexes ) {
1792                 foreach ( $regexes as $regex ) {
1793                         $matches = array();
1794                         if ( preg_match( $regex, $text, $matches ) ) {
1795                                 return $matches[0];
1796                         }
1797                 }
1798                 return false;
1799         }
1800
1801         function setHeaders() {
1802                 global $wgOut, $wgUser;
1803
1804                 $wgOut->addModules( 'mediawiki.action.edit' );
1805
1806                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
1807                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
1808                 }
1809                 // Bug #19334: textarea jumps when editing articles in IE8
1810                 $wgOut->addStyle( 'common/IE80Fixes.css', 'screen', 'IE 8' );
1811
1812                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1813
1814                 # Enabled article-related sidebar, toplinks, etc.
1815                 $wgOut->setArticleRelated( true );
1816
1817                 $contextTitle = $this->getContextTitle();
1818                 if ( $this->isConflict ) {
1819                         $msg = 'editconflict';
1820                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
1821                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1822                 } else {
1823                         $msg = $contextTitle->exists() || ( $contextTitle->getNamespace() == NS_MEDIAWIKI && $contextTitle->getDefaultMessageText() !== false ) ?
1824                                 'editing' : 'creating';
1825                 }
1826                 # Use the title defined by DISPLAYTITLE magic word when present
1827                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
1828                 if ( $displayTitle === false ) {
1829                         $displayTitle = $contextTitle->getPrefixedText();
1830                 }
1831                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
1832         }
1833
1834         /**
1835          * Show all applicable editing introductions
1836          */
1837         protected function showIntro() {
1838                 global $wgOut, $wgUser;
1839                 if ( $this->suppressIntro ) {
1840                         return;
1841                 }
1842
1843                 $namespace = $this->mTitle->getNamespace();
1844
1845                 if ( $namespace == NS_MEDIAWIKI ) {
1846                         # Show a warning if editing an interface message
1847                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
1848                 } else if( $namespace == NS_FILE ) {
1849                         # Show a hint to shared repo
1850                         $file = wfFindFile( $this->mTitle );
1851                         if( $file && !$file->isLocal() ) {
1852                                 $descUrl = $file->getDescriptionUrl();
1853                                 # there must be a description url to show a hint to shared repo
1854                                 if( $descUrl ) {
1855                                         if( !$this->mTitle->exists() ) {
1856                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array (
1857                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
1858                                                 ) );
1859                                         } else {
1860                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
1861                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
1862                                                 ) );
1863                                         }
1864                                 }
1865                         }
1866                 }
1867
1868                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
1869                 # Show log extract when the user is currently blocked
1870                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
1871                         $parts = explode( '/', $this->mTitle->getText(), 2 );
1872                         $username = $parts[0];
1873                         $user = User::newFromName( $username, false /* allow IP users*/ );
1874                         $ip = User::isIP( $username );
1875                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
1876                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
1877                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
1878                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
1879                                 LogEventsList::showLogExtract(
1880                                         $wgOut,
1881                                         'block',
1882                                         $user->getUserPage(),
1883                                         '',
1884                                         array(
1885                                                 'lim' => 1,
1886                                                 'showIfEmpty' => false,
1887                                                 'msgKey' => array(
1888                                                         'blocked-notice-logextract',
1889                                                         $user->getName() # Support GENDER in notice
1890                                                 )
1891                                         )
1892                                 );
1893                         }
1894                 }
1895                 # Try to add a custom edit intro, or use the standard one if this is not possible.
1896                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
1897                         if ( $wgUser->isLoggedIn() ) {
1898                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
1899                         } else {
1900                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
1901                         }
1902                 }
1903                 # Give a notice if the user is editing a deleted/moved page...
1904                 if ( !$this->mTitle->exists() ) {
1905                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
1906                                 '',
1907                                 array(
1908                                         'lim' => 10,
1909                                         'conds' => array( "log_action != 'revision'" ),
1910                                         'showIfEmpty' => false,
1911                                         'msgKey' => array( 'recreate-moveddeleted-warn' )
1912                                 )
1913                         );
1914                 }
1915         }
1916
1917         /**
1918          * Attempt to show a custom editing introduction, if supplied
1919          *
1920          * @return bool
1921          */
1922         protected function showCustomIntro() {
1923                 if ( $this->editintro ) {
1924                         $title = Title::newFromText( $this->editintro );
1925                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
1926                                 global $wgOut;
1927                                 // Added using template syntax, to take <noinclude>'s into account.
1928                                 $wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
1929                                 return true;
1930                         }
1931                 }
1932                 return false;
1933         }
1934
1935         /**
1936          * Gets an editable textual representation of $content.
1937          * The textual representation can be turned by into a Content object by the
1938          * toEditContent() method.
1939          *
1940          * If $content is null or false or a string, $content is returned unchanged.
1941          *
1942          * If the given Content object is not of a type that can be edited using the text base EditPage,
1943          * an exception will be raised. Set $this->allowNonTextContent to true to allow editing of non-textual
1944          * content.
1945          *
1946          * @param Content|null|bool|string $content
1947          * @return String the editable text form of the content.
1948          *
1949          * @throws MWException if $content is not an instance of TextContent and $this->allowNonTextContent is not true.
1950          */
1951         protected function toEditText( $content ) {
1952                 if ( $content === null || $content === false ) {
1953                         return $content;
1954                 }
1955
1956                 if ( is_string( $content ) ) {
1957                         return $content;
1958                 }
1959
1960                 if ( !$this->allowNonTextContent && !( $content instanceof TextContent ) ) {
1961                         throw new MWException( "This content model can not be edited as text: "
1962                                                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
1963                 }
1964
1965                 return $content->serialize( $this->contentFormat );
1966         }
1967
1968         /**
1969          * Turns the given text into a Content object by unserializing it.
1970          *
1971          * If the resulting Content object is not of a type that can be edited using the text base EditPage,
1972          * an exception will be raised. Set $this->allowNonTextContent to true to allow editing of non-textual
1973          * content.
1974          *
1975          * @param String|null|bool $text Text to unserialize
1976          * @return Content The content object created from $text. If $text was false or null, false resp. null will be
1977          *                 returned instead.
1978          *
1979          * @throws MWException if unserializing the text results in a Content object that is not an instance of TextContent
1980          *          and $this->allowNonTextContent is not true.
1981          */
1982         protected function toEditContent( $text ) {
1983                 if ( $text === false || $text === null ) {
1984                         return $text;
1985                 }
1986
1987                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
1988                         $this->contentModel, $this->contentFormat );
1989
1990                 if ( !$this->allowNonTextContent && !( $content instanceof TextContent ) ) {
1991                         throw new MWException( "This content model can not be edited as text: "
1992                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
1993                 }
1994
1995                 return $content;
1996         }
1997
1998         /**
1999          * Send the edit form and related headers to $wgOut
2000          * @param $formCallback Callback|null that takes an OutputPage parameter; will be called
2001          *     during form output near the top, for captchas and the like.
2002          */
2003         function showEditForm( $formCallback = null ) {
2004                 global $wgOut, $wgUser;
2005
2006                 wfProfileIn( __METHOD__ );
2007
2008                 # need to parse the preview early so that we know which templates are used,
2009                 # otherwise users with "show preview after edit box" will get a blank list
2010                 # we parse this near the beginning so that setHeaders can do the title
2011                 # setting work instead of leaving it in getPreviewText
2012                 $previewOutput = '';
2013                 if ( $this->formtype == 'preview' ) {
2014                         $previewOutput = $this->getPreviewText();
2015                 }
2016
2017                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
2018
2019                 $this->setHeaders();
2020
2021                 if ( $this->showHeader() === false ) {
2022                         wfProfileOut( __METHOD__ );
2023                         return;
2024                 }
2025
2026                 $wgOut->addHTML( $this->editFormPageTop );
2027
2028                 if ( $wgUser->getOption( 'previewontop' ) ) {
2029                         $this->displayPreviewArea( $previewOutput, true );
2030                 }
2031
2032                 $wgOut->addHTML( $this->editFormTextTop );
2033
2034                 $showToolbar = true;
2035                 if ( $this->wasDeletedSinceLastEdit() ) {
2036                         if ( $this->formtype == 'save' ) {
2037                                 // Hide the toolbar and edit area, user can click preview to get it back
2038                                 // Add an confirmation checkbox and explanation.
2039                                 $showToolbar = false;
2040                         } else {
2041                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2042                                         'deletedwhileediting' );
2043                         }
2044                 }
2045
2046                 //@todo: add EditForm plugin interface and use it here!
2047                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2048                 $wgOut->addHTML( Html::openElement( 'form', array( 'id' => self::EDITFORM_ID, 'name' => self::EDITFORM_ID,
2049                         'method' => 'post', 'action' => $this->getActionURL( $this->getContextTitle() ),
2050                         'enctype' => 'multipart/form-data' ) ) );
2051
2052                 if ( is_callable( $formCallback ) ) {
2053                         call_user_func_array( $formCallback, array( &$wgOut ) );
2054                 }
2055
2056                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
2057
2058                 // Put these up at the top to ensure they aren't lost on early form submission
2059                 $this->showFormBeforeText();
2060
2061                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2062                         $username = $this->lastDelete->user_name;
2063                         $comment = $this->lastDelete->log_comment;
2064
2065                         // It is better to not parse the comment at all than to have templates expanded in the middle
2066                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2067                         $key = $comment === ''
2068                                 ? 'confirmrecreate-noreason'
2069                                 : 'confirmrecreate';
2070                         $wgOut->addHTML(
2071                                 '<div class="mw-confirm-recreate">' .
2072                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2073                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2074                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2075                                 ) .
2076                                 '</div>'
2077                         );
2078                 }
2079
2080                 # When the summary is hidden, also hide them on preview/show changes
2081                 if( $this->nosummary ) {
2082                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2083                 }
2084
2085                 # If a blank edit summary was previously provided, and the appropriate
2086                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2087                 # user being bounced back more than once in the event that a summary
2088                 # is not required.
2089                 #####
2090                 # For a bit more sophisticated detection of blank summaries, hash the
2091                 # automatic one and pass that in the hidden field wpAutoSummary.
2092                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2093                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2094                 }
2095
2096                 if ( $this->undidRev ) {
2097                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2098                 }
2099
2100                 if ( $this->hasPresetSummary ) {
2101                         // If a summary has been preset using &summary= we dont want to prompt for
2102                         // a different summary. Only prompt for a summary if the summary is blanked.
2103                         // (Bug 17416)
2104                         $this->autoSumm = md5( '' );
2105                 }
2106
2107                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2108                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2109
2110                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2111
2112                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2113                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2114
2115                 if ( $this->section == 'new' ) {
2116                         $this->showSummaryInput( true, $this->summary );
2117                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2118                 }
2119
2120                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2121
2122                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2123                         $wgOut->addHTML( EditPage::getEditToolbar() );
2124                 }
2125
2126                 if ( $this->isConflict ) {
2127                         // In an edit conflict bypass the overrideable content form method
2128                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2129                         // resolved between page source edits and custom ui edits using the
2130                         // custom edit ui.
2131                         $this->textbox2 = $this->textbox1;
2132
2133                         $content = $this->getCurrentContent();
2134                         $this->textbox1 = $this->toEditText( $content );
2135
2136                         $this->showTextbox1();
2137                 } else {
2138                         $this->showContentForm();
2139                 }
2140
2141                 $wgOut->addHTML( $this->editFormTextAfterContent );
2142
2143                 $this->showStandardInputs();
2144
2145                 $this->showFormAfterText();
2146
2147                 $this->showTosSummary();
2148
2149                 $this->showEditTools();
2150
2151                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2152
2153                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2154                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2155
2156                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2157                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2158
2159                 if ( $this->isConflict ) {
2160                         try {
2161                                 $this->showConflict();
2162                         } catch ( MWContentSerializationException $ex ) {
2163                                 // this can't really happen, but be nice if it does.
2164                                 $msg = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
2165                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>');
2166                         }
2167                 }
2168
2169                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2170
2171                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2172                         $this->displayPreviewArea( $previewOutput, false );
2173                 }
2174
2175                 wfProfileOut( __METHOD__ );
2176         }
2177
2178         /**
2179          * Extract the section title from current section text, if any.
2180          *
2181          * @param string $text
2182          * @return Mixed|string or false
2183          */
2184         public static function extractSectionTitle( $text ) {
2185                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2186                 if ( !empty( $matches[2] ) ) {
2187                         global $wgParser;
2188                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2189                 } else {
2190                         return false;
2191                 }
2192         }
2193
2194         protected function showHeader() {
2195                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2196
2197                 if ( $this->mTitle->isTalkPage() ) {
2198                         $wgOut->addWikiMsg( 'talkpagetext' );
2199                 }
2200
2201                 // Add edit notices
2202                 $wgOut->addHTML( implode( "\n", $this->mTitle->getEditNotices() ) );
2203
2204                 if ( $this->isConflict ) {
2205                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2206                         $this->edittime = $this->mArticle->getTimestamp();
2207                 } else {
2208                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2209                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2210                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2211                                 // Someone is welcome to try refactoring though
2212                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2213                                 return false;
2214                         }
2215
2216                         if ( $this->section != '' && $this->section != 'new' ) {
2217                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2218                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); //FIXME: use Content object
2219                                         if ( $sectionTitle !== false ) {
2220                                                 $this->summary = "/* $sectionTitle */ ";
2221                                         }
2222                                 }
2223                         }
2224
2225                         if ( $this->missingComment ) {
2226                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2227                         }
2228
2229                         if ( $this->missingSummary && $this->section != 'new' ) {
2230                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2231                         }
2232
2233                         if ( $this->missingSummary && $this->section == 'new' ) {
2234                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2235                         }
2236
2237                         if ( $this->hookError !== '' ) {
2238                                 $wgOut->addWikiText( $this->hookError );
2239                         }
2240
2241                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2242                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2243                         }
2244
2245                         if ( $this->section != 'new' ) {
2246                                 $revision = $this->mArticle->getRevisionFetched();
2247                                 if ( $revision ) {
2248                                         // Let sysop know that this will make private content public if saved
2249
2250                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2251                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
2252                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2253                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
2254                                         }
2255
2256                                         if ( !$revision->isCurrent() ) {
2257                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2258                                                 $wgOut->addWikiMsg( 'editingold' );
2259                                         }
2260                                 } elseif ( $this->mTitle->exists() ) {
2261                                         // Something went wrong
2262
2263                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2264                                                 array( 'missing-revision', $this->oldid ) );
2265                                 }
2266                         }
2267                 }
2268
2269                 if ( wfReadOnly() ) {
2270                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
2271                 } elseif ( $wgUser->isAnon() ) {
2272                         if ( $this->formtype != 'preview' ) {
2273                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
2274                         } else {
2275                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
2276                         }
2277                 } else {
2278                         if ( $this->isCssJsSubpage ) {
2279                                 # Check the skin exists
2280                                 if ( $this->isWrongCaseCssJsPage ) {
2281                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
2282                                 }
2283                                 if ( $this->formtype !== 'preview' ) {
2284                                         if ( $this->isCssSubpage ) {
2285                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
2286                                         }
2287
2288                                         if ( $this->isJsSubpage ) {
2289                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
2290                                         }
2291                                 }
2292                         }
2293                 }
2294
2295                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2296                         # Is the title semi-protected?
2297                         if ( $this->mTitle->isSemiProtected() ) {
2298                                 $noticeMsg = 'semiprotectedpagewarning';
2299                         } else {
2300                                 # Then it must be protected based on static groups (regular)
2301                                 $noticeMsg = 'protectedpagewarning';
2302                         }
2303                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2304                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2305                 }
2306                 if ( $this->mTitle->isCascadeProtected() ) {
2307                         # Is this page under cascading protection from some source pages?
2308                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2309                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2310                         $cascadeSourcesCount = count( $cascadeSources );
2311                         if ( $cascadeSourcesCount > 0 ) {
2312                                 # Explain, and list the titles responsible
2313                                 foreach ( $cascadeSources as $page ) {
2314                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2315                                 }
2316                         }
2317                         $notice .= '</div>';
2318                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2319                 }
2320                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2321                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2322                                 array( 'lim' => 1,
2323                                         'showIfEmpty' => false,
2324                                         'msgKey' => array( 'titleprotectedwarning' ),
2325                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2326                 }
2327
2328                 if ( $this->kblength === false ) {
2329                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2330                 }
2331
2332                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2333                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2334                                 array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
2335                 } else {
2336                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2337                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2338                                         array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
2339                                 );
2340                         }
2341                 }
2342                 # Add header copyright warning
2343                 $this->showHeaderCopyrightWarning();
2344         }
2345
2346
2347         /**
2348          * Standard summary input and label (wgSummary), abstracted so EditPage
2349          * subclasses may reorganize the form.
2350          * Note that you do not need to worry about the label's for=, it will be
2351          * inferred by the id given to the input. You can remove them both by
2352          * passing array( 'id' => false ) to $userInputAttrs.
2353          *
2354          * @param $summary string The value of the summary input
2355          * @param $labelText string The html to place inside the label
2356          * @param $inputAttrs array of attrs to use on the input
2357          * @param $spanLabelAttrs array of attrs to use on the span inside the label
2358          *
2359          * @return array An array in the format array( $label, $input )
2360          */
2361         function getSummaryInput( $summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null ) {
2362                 // Note: the maxlength is overriden in JS to 255 and to make it use UTF-8 bytes, not characters.
2363                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2364                         'id' => 'wpSummary',
2365                         'maxlength' => '200',
2366                         'tabindex' => '1',
2367                         'size' => 60,
2368                         'spellcheck' => 'true',
2369                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2370
2371                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2372                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2373                         'id' => "wpSummaryLabel"
2374                 );
2375
2376                 $label = null;
2377                 if ( $labelText ) {
2378                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
2379                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2380                 }
2381
2382                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2383
2384                 return array( $label, $input );
2385         }
2386
2387         /**
2388          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2389          *                          up top, or false if this is the comment summary
2390          *                          down below the textarea
2391          * @param $summary String: The text of the summary to display
2392          * @return String
2393          */
2394         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2395                 global $wgOut, $wgContLang;
2396                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2397                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2398                 if ( $isSubjectPreview ) {
2399                         if ( $this->nosummary ) {
2400                                 return;
2401                         }
2402                 } else {
2403                         if ( !$this->mShowSummaryField ) {
2404                                 return;
2405                         }
2406                 }
2407                 $summary = $wgContLang->recodeForEdit( $summary );
2408                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2409                 list( $label, $input ) = $this->getSummaryInput( $summary, $labelText, array( 'class' => $summaryClass ), array() );
2410                 $wgOut->addHTML( "{$label} {$input}" );
2411         }
2412
2413         /**
2414          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2415          *                          up top, or false if this is the comment summary
2416          *                          down below the textarea
2417          * @param $summary String: the text of the summary to display
2418          * @return String
2419          */
2420         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2421                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
2422                         return "";
2423                 }
2424
2425                 global $wgParser;
2426
2427                 if ( $isSubjectPreview ) {
2428                         $summary = wfMessage( 'newsectionsummary', $wgParser->stripSectionName( $summary ) )
2429                                 ->inContentLanguage()->text();
2430                 }
2431
2432                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2433
2434                 $summary = wfMessage( $message )->parse() . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2435                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2436         }
2437
2438         protected function showFormBeforeText() {
2439                 global $wgOut;
2440                 $section = htmlspecialchars( $this->section );
2441                 $wgOut->addHTML( <<<HTML
2442 <input type='hidden' value="{$section}" name="wpSection" />
2443 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2444 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2445 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2446
2447 HTML
2448                 );
2449                 if ( !$this->checkUnicodeCompliantBrowser() ) {
2450                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2451                 }
2452         }
2453
2454         protected function showFormAfterText() {
2455                 global $wgOut, $wgUser;
2456                 /**
2457                  * To make it harder for someone to slip a user a page
2458                  * which submits an edit form to the wiki without their
2459                  * knowledge, a random token is associated with the login
2460                  * session. If it's not passed back with the submission,
2461                  * we won't save the page, or render user JavaScript and
2462                  * CSS previews.
2463                  *
2464                  * For anon editors, who may not have a session, we just
2465                  * include the constant suffix to prevent editing from
2466                  * broken text-mangling proxies.
2467                  */
2468                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2469         }
2470
2471         /**
2472          * Subpage overridable method for printing the form for page content editing
2473          * By default this simply outputs wpTextbox1
2474          * Subclasses can override this to provide a custom UI for editing;
2475          * be it a form, or simply wpTextbox1 with a modified content that will be
2476          * reverse modified when extracted from the post data.
2477          * Note that this is basically the inverse for importContentFormData
2478          */
2479         protected function showContentForm() {
2480                 $this->showTextbox1();
2481         }
2482
2483         /**
2484          * Method to output wpTextbox1
2485          * The $textoverride method can be used by subclasses overriding showContentForm
2486          * to pass back to this method.
2487          *
2488          * @param $customAttribs array of html attributes to use in the textarea
2489          * @param $textoverride String: optional text to override $this->textarea1 with
2490          */
2491         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2492                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2493                         $attribs = array( 'style' => 'display:none;' );
2494                 } else {
2495                         $classes = array(); // Textarea CSS
2496                         if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2497                                 # Is the title semi-protected?
2498                                 if ( $this->mTitle->isSemiProtected() ) {
2499                                         $classes[] = 'mw-textarea-sprotected';
2500                                 } else {
2501                                         # Then it must be protected based on static groups (regular)
2502                                         $classes[] = 'mw-textarea-protected';
2503                                 }
2504                                 # Is the title cascade-protected?
2505                                 if ( $this->mTitle->isCascadeProtected() ) {
2506                                         $classes[] = 'mw-textarea-cprotected';
2507                                 }
2508                         }
2509
2510                         $attribs = array( 'tabindex' => 1 );
2511
2512                         if ( is_array( $customAttribs ) ) {
2513                                 $attribs += $customAttribs;
2514                         }
2515
2516                         if ( count( $classes ) ) {
2517                                 if ( isset( $attribs['class'] ) ) {
2518                                         $classes[] = $attribs['class'];
2519                                 }
2520                                 $attribs['class'] = implode( ' ', $classes );
2521                         }
2522                 }
2523
2524                 $this->showTextbox( $textoverride !== null ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
2525         }
2526
2527         protected function showTextbox2() {
2528                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2529         }
2530
2531         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2532                 global $wgOut, $wgUser;
2533
2534                 $wikitext = $this->safeUnicodeOutput( $text );
2535                 if ( strval( $wikitext ) !== '' ) {
2536                         // Ensure there's a newline at the end, otherwise adding lines
2537                         // is awkward.
2538                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2539                         // mode will show an extra newline. A bit annoying.
2540                         $wikitext .= "\n";
2541                 }
2542
2543                 $attribs = $customAttribs + array(
2544                         'accesskey' => ',',
2545                         'id'   => $name,
2546                         'cols' => $wgUser->getIntOption( 'cols' ),
2547                         'rows' => $wgUser->getIntOption( 'rows' ),
2548                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
2549                 );
2550
2551                 $pageLang = $this->mTitle->getPageLanguage();
2552                 $attribs['lang'] = $pageLang->getCode();
2553                 $attribs['dir'] = $pageLang->getDir();
2554
2555                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2556         }
2557
2558         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2559                 global $wgOut;
2560                 $classes = array();
2561                 if ( $isOnTop ) {
2562                         $classes[] = 'ontop';
2563                 }
2564
2565                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2566
2567                 if ( $this->formtype != 'preview' ) {
2568                         $attribs['style'] = 'display: none;';
2569                 }
2570
2571                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2572
2573                 if ( $this->formtype == 'preview' ) {
2574                         $this->showPreview( $previewOutput );
2575                 }
2576
2577                 $wgOut->addHTML( '</div>' );
2578
2579                 if ( $this->formtype == 'diff' ) {
2580                         try {
2581                                 $this->showDiff();
2582                         } catch ( MWContentSerializationException $ex ) {
2583                                 $msg = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
2584                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>');
2585                         }
2586                 }
2587         }
2588
2589         /**
2590          * Append preview output to $wgOut.
2591          * Includes category rendering if this is a category page.
2592          *
2593          * @param $text String: the HTML to be output for the preview.
2594          */
2595         protected function showPreview( $text ) {
2596                 global $wgOut;
2597                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2598                         $this->mArticle->openShowCategory();
2599                 }
2600                 # This hook seems slightly odd here, but makes things more
2601                 # consistent for extensions.
2602                 wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
2603                 $wgOut->addHTML( $text );
2604                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2605                         $this->mArticle->closeShowCategory();
2606                 }
2607         }
2608
2609         /**
2610          * Get a diff between the current contents of the edit box and the
2611          * version of the page we're editing from.
2612          *
2613          * If this is a section edit, we'll replace the section as for final
2614          * save and then make a comparison.
2615          */
2616         function showDiff() {
2617                 global $wgUser, $wgContLang, $wgOut;
2618
2619                 $oldtitlemsg = 'currentrev';
2620                 # if message does not exist, show diff against the preloaded default
2621                 if( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
2622                         $oldtext = $this->mTitle->getDefaultMessageText();
2623                         if( $oldtext !== false ) {
2624                                 $oldtitlemsg = 'defaultmessagetext';
2625                                 $oldContent = $this->toEditContent( $oldtext );
2626                         } else {
2627                                 $oldContent = null;
2628                         }
2629                 } else {
2630                         $oldContent = $this->getCurrentContent();
2631                 }
2632
2633                 $textboxContent = $this->toEditContent( $this->textbox1 );
2634
2635                 $newContent = $this->mArticle->replaceSectionContent(
2636                                                         $this->section, $textboxContent,
2637                                                         $this->summary, $this->edittime );
2638
2639                 if ( $newContent ) {
2640                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
2641                         wfRunHooks( 'EditPageGetDiffContent', array( $this, &$newContent ) );
2642
2643                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
2644                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
2645                 }
2646
2647                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
2648                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
2649                         $newtitle = wfMessage( 'yourtext' )->parse();
2650
2651                         if ( !$oldContent ) {
2652                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
2653                         }
2654
2655                         if ( !$newContent ) {
2656                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
2657                         }
2658
2659                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
2660                         $de->setContent( $oldContent, $newContent );
2661
2662                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2663                         $de->showDiffStyle();
2664                 } else {
2665                         $difftext = '';
2666                 }
2667
2668                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2669         }
2670
2671         /**
2672          * Show the header copyright warning.
2673          */
2674         protected function showHeaderCopyrightWarning() {
2675                 $msg = 'editpage-head-copy-warn';
2676                 if ( !wfMessage( $msg )->isDisabled() ) {
2677                         global $wgOut;
2678                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
2679                                 'editpage-head-copy-warn' );
2680                 }
2681         }
2682
2683         /**
2684          * Give a chance for site and per-namespace customizations of
2685          * terms of service summary link that might exist separately
2686          * from the copyright notice.
2687          *
2688          * This will display between the save button and the edit tools,
2689          * so should remain short!
2690          */
2691         protected function showTosSummary() {
2692                 $msg = 'editpage-tos-summary';
2693                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
2694                 if ( !wfMessage( $msg )->isDisabled() ) {
2695                         global $wgOut;
2696                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
2697                         $wgOut->addWikiMsg( $msg );
2698                         $wgOut->addHTML( '</div>' );
2699                 }
2700         }
2701
2702         protected function showEditTools() {
2703                 global $wgOut;
2704                 $wgOut->addHTML( '<div class="mw-editTools">' .
2705                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
2706                         '</div>' );
2707         }
2708
2709         /**
2710          * Get the copyright warning
2711          *
2712          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
2713          */
2714         protected function getCopywarn() {
2715                 return self::getCopyrightWarning( $this->mTitle );
2716         }
2717
2718         public static function getCopyrightWarning( $title ) {
2719                 global $wgRightsText;
2720                 if ( $wgRightsText ) {
2721                         $copywarnMsg = array( 'copyrightwarning',
2722                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
2723                                 $wgRightsText );
2724                 } else {
2725                         $copywarnMsg = array( 'copyrightwarning2',
2726                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
2727                 }
2728                 // Allow for site and per-namespace customization of contribution/copyright notice.
2729                 wfRunHooks( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
2730
2731                 return "<div id=\"editpage-copywarn\">\n" .
2732                         call_user_func_array( 'wfMessage', $copywarnMsg )->plain() . "\n</div>";
2733         }
2734
2735         protected function showStandardInputs( &$tabindex = 2 ) {
2736                 global $wgOut;
2737                 $wgOut->addHTML( "<div class='editOptions'>\n" );
2738
2739                 if ( $this->section != 'new' ) {
2740                         $this->showSummaryInput( false, $this->summary );
2741                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
2742                 }
2743
2744                 $checkboxes = $this->getCheckboxes( $tabindex,
2745                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
2746                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
2747
2748                 // Show copyright warning.
2749                 $wgOut->addWikiText( $this->getCopywarn() );
2750                 $wgOut->addHTML( $this->editFormTextAfterWarn );
2751
2752                 $wgOut->addHTML( "<div class='editButtons'>\n" );
2753                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
2754
2755                 $cancel = $this->getCancelLink();
2756                 if ( $cancel !== '' ) {
2757                         $cancel .= wfMessage( 'pipe-separator' )->text();
2758                 }
2759                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMessage( 'edithelppage' )->inContentLanguage()->text() );
2760                 $edithelp = '<a target="helpwindow" href="' . $edithelpurl . '">' .
2761                         wfMessage( 'edithelp' )->escaped() . '</a> ' .
2762                         wfMessage( 'newwindow' )->parse();
2763                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
2764                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
2765                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
2766                 wfRunHooks( 'EditPage::showStandardInputs:options', array( $this, $wgOut, &$tabindex ) );
2767                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
2768         }
2769
2770         /**
2771          * Show an edit conflict. textbox1 is already shown in showEditForm().
2772          * If you want to use another entry point to this function, be careful.
2773          */
2774         protected function showConflict() {
2775                 global $wgOut;
2776
2777                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
2778                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2779
2780                         $content1 = $this->toEditContent( $this->textbox1 );
2781                         $content2 = $this->toEditContent( $this->textbox2 );
2782
2783                         $handler = ContentHandler::getForModelID( $this->contentModel );
2784                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
2785                         $de->setContent( $content2, $content1 );
2786                         $de->showDiff(
2787                                 wfMessage( 'yourtext' )->parse(),
2788                                 wfMessage( 'storedversion' )->text()
2789                         );
2790
2791                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2792                         $this->showTextbox2();
2793                 }
2794         }
2795
2796         /**
2797          * @return string
2798          */
2799         public function getCancelLink() {
2800                 $cancelParams = array();
2801                 if ( !$this->isConflict && $this->oldid > 0 ) {
2802                         $cancelParams['oldid'] = $this->oldid;
2803                 }
2804
2805                 return Linker::linkKnown(
2806                         $this->getContextTitle(),
2807                         wfMessage( 'cancel' )->parse(),
2808                         array( 'id' => 'mw-editform-cancel' ),
2809                         $cancelParams
2810                 );
2811         }
2812
2813         /**
2814          * Returns the URL to use in the form's action attribute.
2815          * This is used by EditPage subclasses when simply customizing the action
2816          * variable in the constructor is not enough. This can be used when the
2817          * EditPage lives inside of a Special page rather than a custom page action.
2818          *
2819          * @param $title Title object for which is being edited (where we go to for &action= links)
2820          * @return string
2821          */
2822         protected function getActionURL( Title $title ) {
2823                 return $title->getLocalURL( array( 'action' => $this->action ) );
2824         }
2825
2826         /**
2827          * Check if a page was deleted while the user was editing it, before submit.
2828          * Note that we rely on the logging table, which hasn't been always there,
2829          * but that doesn't matter, because this only applies to brand new
2830          * deletes.
2831          */
2832         protected function wasDeletedSinceLastEdit() {
2833                 if ( $this->deletedSinceEdit !== null ) {
2834                         return $this->deletedSinceEdit;
2835                 }
2836
2837                 $this->deletedSinceEdit = false;
2838
2839                 if ( $this->mTitle->isDeletedQuick() ) {
2840                         $this->lastDelete = $this->getLastDelete();
2841                         if ( $this->lastDelete ) {
2842                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
2843                                 if ( $deleteTime > $this->starttime ) {
2844                                         $this->deletedSinceEdit = true;
2845                                 }
2846                         }
2847                 }
2848
2849                 return $this->deletedSinceEdit;
2850         }
2851
2852         protected function getLastDelete() {
2853                 $dbr = wfGetDB( DB_SLAVE );
2854                 $data = $dbr->selectRow(
2855                         array( 'logging', 'user' ),
2856                         array( 'log_type',
2857                                    'log_action',
2858                                    'log_timestamp',
2859                                    'log_user',
2860                                    'log_namespace',
2861                                    'log_title',
2862                                    'log_comment',
2863                                    'log_params',
2864                                    'log_deleted',
2865                                    'user_name' ),
2866                         array( 'log_namespace' => $this->mTitle->getNamespace(),
2867                                    'log_title' => $this->mTitle->getDBkey(),
2868                                    'log_type' => 'delete',
2869                                    'log_action' => 'delete',
2870                                    'user_id=log_user' ),
2871                         __METHOD__,
2872                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
2873                 );
2874                 // Quick paranoid permission checks...
2875                 if ( is_object( $data ) ) {
2876                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
2877                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
2878                         }
2879
2880                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
2881                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
2882                         }
2883                 }
2884                 return $data;
2885         }
2886
2887         /**
2888          * Get the rendered text for previewing.
2889          * @throws MWException
2890          * @return string
2891          */
2892         function getPreviewText() {
2893                 global $wgOut, $wgUser, $wgRawHtml, $wgLang;
2894
2895                 wfProfileIn( __METHOD__ );
2896
2897                 if ( $wgRawHtml && !$this->mTokenOk ) {
2898                         // Could be an offsite preview attempt. This is very unsafe if
2899                         // HTML is enabled, as it could be an attack.
2900                         $parsedNote = '';
2901                         if ( $this->textbox1 !== '' ) {
2902                                 // Do not put big scary notice, if previewing the empty
2903                                 // string, which happens when you initially edit
2904                                 // a category page, due to automatic preview-on-open.
2905                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
2906                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
2907                         }
2908                         wfProfileOut( __METHOD__ );
2909                         return $parsedNote;
2910                 }
2911
2912                 $note = '';
2913
2914                 try {
2915                         $content = $this->toEditContent( $this->textbox1 );
2916
2917                         $previewHTML = '';
2918                         if ( !wfRunHooks( 'AlternateEditPreview', array( $this, &$content, &$previewHTML, &$this->mParserOutput ) ) ) {
2919                                 wfProfileOut( __METHOD__ );
2920                                 return $previewHTML;
2921                         }
2922
2923                         if ( $this->mTriedSave && !$this->mTokenOk ) {
2924                                 if ( $this->mTokenOkExceptSuffix ) {
2925                                         $note = wfMessage( 'token_suffix_mismatch' )->plain() ;
2926
2927                                 } else {
2928                                         $note = wfMessage( 'session_fail_preview' )->plain() ;
2929                                 }
2930                         } elseif ( $this->incompleteForm ) {
2931                                 $note = wfMessage( 'edit_form_incomplete' )->plain() ;
2932                         } else {
2933                                 $note = wfMessage( 'previewnote' )->plain() .
2934                                         ' [[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' . wfMessage( 'continue-editing' )->text() . ']]';
2935                         }
2936
2937                         $parserOptions = $this->mArticle->makeParserOptions( $this->mArticle->getContext() );
2938                         $parserOptions->setEditSection( false );
2939                         $parserOptions->setIsPreview( true );
2940                         $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
2941
2942                         # don't parse non-wikitext pages, show message about preview
2943                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
2944                                 if( $this->mTitle->isCssJsSubpage() ) {
2945                                         $level = 'user';
2946                                 } elseif( $this->mTitle->isCssOrJsPage() ) {
2947                                         $level = 'site';
2948                                 } else {
2949                                         $level = false;
2950                                 }
2951
2952                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
2953                                         $format = 'css';
2954                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
2955                                         $format = 'js';
2956                                 } else {
2957                                         $format = false;
2958                                 }
2959
2960                                 # Used messages to make sure grep find them:
2961                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
2962                                 if( $level && $format ) {
2963                                         $note = "<div id='mw-{$level}{$format}preview'>" . wfMessage( "{$level}{$format}preview" )->text()  . "</div>";
2964                                 }
2965                         }
2966
2967                         $rt = $content->getRedirectChain();
2968                         if ( $rt ) {
2969                                 $previewHTML = $this->mArticle->viewRedirect( $rt, false );
2970                         } else {
2971
2972                                 # If we're adding a comment, we need to show the
2973                                 # summary as the headline
2974                                 if ( $this->section === "new" && $this->summary !== "" ) {
2975                                         $content = $content->addSectionHeader( $this->summary );
2976                                 }
2977
2978                                 $hook_args = array( $this, &$content );
2979                                 ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
2980                                 wfRunHooks( 'EditPageGetPreviewContent', $hook_args );
2981
2982                                 $parserOptions->enableLimitReport();
2983
2984                                 # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
2985                                 # But it's now deprecated, so never mind
2986
2987                                 $content = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
2988                                 $parserOutput = $content->getParserOutput( $this->getArticle()->getTitle(), null, $parserOptions );
2989
2990                                 $previewHTML = $parserOutput->getText();
2991                                 $this->mParserOutput = $parserOutput;
2992                                 $wgOut->addParserOutputNoText( $parserOutput );
2993
2994                                 if ( count( $parserOutput->getWarnings() ) ) {
2995                                         $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
2996                                 }
2997                         }
2998                 } catch ( MWContentSerializationException $ex ) {
2999                         $m = wfMessage('content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
3000                         $note .= "\n\n" . $m->parse();
3001                         $previewHTML = '';
3002                 }
3003
3004                 if ( $this->isConflict ) {
3005                         $conflict = '<h2 id="mw-previewconflict">' . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
3006                 } else {
3007                         $conflict = '<hr />';
3008                 }
3009
3010                 $previewhead = "<div class='previewnote'>\n" .
3011                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
3012                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3013
3014                 $pageLang = $this->mTitle->getPageLanguage();
3015                 $attribs = array( 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
3016                         'class' => 'mw-content-' . $pageLang->getDir() );
3017                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3018
3019                 wfProfileOut( __METHOD__ );
3020                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3021         }
3022
3023         /**
3024          * @return Array
3025          */
3026         function getTemplates() {
3027                 if ( $this->preview || $this->section != '' ) {
3028                         $templates = array();
3029                         if ( !isset( $this->mParserOutput ) ) {
3030                                 return $templates;
3031                         }
3032                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3033                                 foreach ( array_keys( $template ) as $dbk ) {
3034                                         $templates[] = Title::makeTitle( $ns, $dbk );
3035                                 }
3036                         }
3037                         return $templates;
3038                 } else {
3039                         return $this->mTitle->getTemplateLinksFrom();
3040                 }
3041         }
3042
3043         /**
3044          * Shows a bulletin board style toolbar for common editing functions.
3045          * It can be disabled in the user preferences.
3046          * The necessary JavaScript code can be found in skins/common/edit.js.
3047          *
3048          * @return string
3049          */
3050         static function getEditToolbar() {
3051                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
3052                 global $wgUseTeX, $wgEnableUploads, $wgForeignFileRepos;
3053
3054                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3055
3056                 /**
3057                  * $toolarray is an array of arrays each of which includes the
3058                  * filename of the button image (without path), the opening
3059                  * tag, the closing tag, optionally a sample text that is
3060                  * inserted between the two when no selection is highlighted
3061                  * and.  The tip text is shown when the user moves the mouse
3062                  * over the button.
3063                  *
3064                  * Also here: accesskeys (key), which are not used yet until
3065                  * someone can figure out a way to make them work in
3066                  * IE. However, we should make sure these keys are not defined
3067                  * on the edit page.
3068                  */
3069                 $toolarray = array(
3070                         array(
3071                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
3072                                 'id'     => 'mw-editbutton-bold',
3073                                 'open'   => '\'\'\'',
3074                                 'close'  => '\'\'\'',
3075                                 'sample' => wfMessage( 'bold_sample' )->text(),
3076                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3077                                 'key'    => 'B'
3078                         ),
3079                         array(
3080                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
3081                                 'id'     => 'mw-editbutton-italic',
3082                                 'open'   => '\'\'',
3083                                 'close'  => '\'\'',
3084                                 'sample' => wfMessage( 'italic_sample' )->text(),
3085                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3086                                 'key'    => 'I'
3087                         ),
3088                         array(
3089                                 'image'  => $wgLang->getImageFile( 'button-link' ),
3090                                 'id'     => 'mw-editbutton-link',
3091                                 'open'   => '[[',
3092                                 'close'  => ']]',
3093                                 'sample' => wfMessage( 'link_sample' )->text(),
3094                                 'tip'    => wfMessage( 'link_tip' )->text(),
3095                                 'key'    => 'L'
3096                         ),
3097                         array(
3098                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
3099                                 'id'     => 'mw-editbutton-extlink',
3100                                 'open'   => '[',
3101                                 'close'  => ']',
3102                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3103                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3104                                 'key'    => 'X'
3105                         ),
3106                         array(
3107                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
3108                                 'id'     => 'mw-editbutton-headline',
3109                                 'open'   => "\n== ",
3110                                 'close'  => " ==\n",
3111                                 'sample' => wfMessage( 'headline_sample' )->text(),
3112                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3113                                 'key'    => 'H'
3114                         ),
3115                         $imagesAvailable ? array(
3116                                 'image'  => $wgLang->getImageFile( 'button-image' ),
3117                                 'id'     => 'mw-editbutton-image',
3118                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3119                                 'close'  => ']]',
3120                                 'sample' => wfMessage( 'image_sample' )->text(),
3121                                 'tip'    => wfMessage( 'image_tip' )->text(),
3122                                 'key'    => 'D',
3123                         ) : false,
3124                         $imagesAvailable ? array(
3125                                 'image'  => $wgLang->getImageFile( 'button-media' ),
3126                                 'id'     => 'mw-editbutton-media',
3127                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3128                                 'close'  => ']]',
3129                                 'sample' => wfMessage( 'media_sample' )->text(),
3130                                 'tip'    => wfMessage( 'media_tip' )->text(),
3131                                 'key'    => 'M'
3132                         ) : false,
3133                         $wgUseTeX ? array(
3134                                 'image'  => $wgLang->getImageFile( 'button-math' ),
3135                                 'id'     => 'mw-editbutton-math',
3136                                 'open'   => "<math>",
3137                                 'close'  => "</math>",
3138                                 'sample' => wfMessage( 'math_sample' )->text(),
3139                                 'tip'    => wfMessage( 'math_tip' )->text(),
3140                                 'key'    => 'C'
3141                         ) : false,
3142                         array(
3143                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
3144                                 'id'     => 'mw-editbutton-nowiki',
3145                                 'open'   => "<nowiki>",
3146                                 'close'  => "</nowiki>",
3147                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3148                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3149                                 'key'    => 'N'
3150                         ),
3151                         array(
3152                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
3153                                 'id'     => 'mw-editbutton-signature',
3154                                 'open'   => '--~~~~',
3155                                 'close'  => '',
3156                                 'sample' => '',
3157                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3158                                 'key'    => 'Y'
3159                         ),
3160                         array(
3161                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
3162                                 'id'     => 'mw-editbutton-hr',
3163                                 'open'   => "\n----\n",
3164                                 'close'  => '',
3165                                 'sample' => '',
3166                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3167                                 'key'    => 'R'
3168                         )
3169                 );
3170
3171                 $script = 'mw.loader.using("mediawiki.action.edit", function() {';
3172                 foreach ( $toolarray as $tool ) {
3173                         if ( !$tool ) {
3174                                 continue;
3175                         }
3176
3177                         $params = array(
3178                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
3179                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3180                                 // Older browsers show a "speedtip" type message only for ALT.
3181                                 // Ideally these should be different, realistically they
3182                                 // probably don't need to be.
3183                                 $tip = $tool['tip'],
3184                                 $open = $tool['open'],
3185                                 $close = $tool['close'],
3186                                 $sample = $tool['sample'],
3187                                 $cssId = $tool['id'],
3188                         );
3189
3190                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
3191                 }
3192
3193                 // This used to be called on DOMReady from mediawiki.action.edit, which
3194                 // ended up causing race conditions with the setup code above.
3195                 $script .= "\n" .
3196                         "// Create button bar\n" .
3197                         "$(function() { mw.toolbar.init(); } );\n";
3198
3199                 $script .= '});';
3200                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3201
3202                 $toolbar = '<div id="toolbar"></div>';
3203
3204                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3205
3206                 return $toolbar;
3207         }
3208
3209         /**
3210          * Returns an array of html code of the following checkboxes:
3211          * minor and watch
3212          *
3213          * @param $tabindex int Current tabindex
3214          * @param $checked Array of checkbox => bool, where bool indicates the checked
3215          *                 status of the checkbox
3216          *
3217          * @return array
3218          */
3219         public function getCheckboxes( &$tabindex, $checked ) {
3220                 global $wgUser;
3221
3222                 $checkboxes = array();
3223
3224                 // don't show the minor edit checkbox if it's a new page or section
3225                 if ( !$this->isNew ) {
3226                         $checkboxes['minor'] = '';
3227                         $minorLabel = wfMessage( 'minoredit' )->parse();
3228                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3229                                 $attribs = array(
3230                                         'tabindex'  => ++$tabindex,
3231                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3232                                         'id'        => 'wpMinoredit',
3233                                 );
3234                                 $checkboxes['minor'] =
3235                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3236                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3237                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3238                                         ">{$minorLabel}</label>";
3239                         }
3240                 }
3241
3242                 $watchLabel = wfMessage( 'watchthis' )->parse();
3243                 $checkboxes['watch'] = '';
3244                 if ( $wgUser->isLoggedIn() ) {
3245                         $attribs = array(
3246                                 'tabindex'  => ++$tabindex,
3247                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3248                                 'id'        => 'wpWatchthis',
3249                         );
3250                         $checkboxes['watch'] =
3251                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3252                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3253                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3254                                 ">{$watchLabel}</label>";
3255                 }
3256                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3257                 return $checkboxes;
3258         }
3259
3260         /**
3261          * Returns an array of html code of the following buttons:
3262          * save, diff, preview and live
3263          *
3264          * @param $tabindex int Current tabindex
3265          *
3266          * @return array
3267          */
3268         public function getEditButtons( &$tabindex ) {
3269                 $buttons = array();
3270
3271                 $temp = array(
3272                         'id'        => 'wpSave',
3273                         'name'      => 'wpSave',
3274                         'type'      => 'submit',
3275                         'tabindex'  => ++$tabindex,
3276                         'value'     => wfMessage( 'savearticle' )->text(),
3277                         'accesskey' => wfMessage( 'accesskey-save' )->text(),
3278                         'title'     => wfMessage( 'tooltip-save' )->text() . ' [' . wfMessage( 'accesskey-save' )->text() . ']',
3279                 );
3280                 $buttons['save'] = Xml::element( 'input', $temp, '' );
3281
3282                 ++$tabindex; // use the same for preview and live preview
3283                 $temp = array(
3284                         'id'        => 'wpPreview',
3285                         'name'      => 'wpPreview',
3286                         'type'      => 'submit',
3287                         'tabindex'  => $tabindex,
3288                         'value'     => wfMessage( 'showpreview' )->text(),
3289                         'accesskey' => wfMessage( 'accesskey-preview' )->text(),
3290                         'title'     => wfMessage( 'tooltip-preview' )->text() . ' [' . wfMessage( 'accesskey-preview' )->text() . ']',
3291                 );
3292                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
3293                 $buttons['live'] = '';
3294
3295                 $temp = array(
3296                         'id'        => 'wpDiff',
3297                         'name'      => 'wpDiff',
3298                         'type'      => 'submit',
3299                         'tabindex'  => ++$tabindex,
3300                         'value'     => wfMessage( 'showdiff' )->text(),
3301                         'accesskey' => wfMessage( 'accesskey-diff' )->text(),
3302                         'title'     => wfMessage( 'tooltip-diff' )->text() . ' [' . wfMessage( 'accesskey-diff' )->text() . ']',
3303                 );
3304                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
3305
3306                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3307                 return $buttons;
3308         }
3309
3310         /**
3311          * Output preview text only. This can be sucked into the edit page
3312          * via JavaScript, and saves the server time rendering the skin as
3313          * well as theoretically being more robust on the client (doesn't
3314          * disturb the edit box's undo history, won't eat your text on
3315          * failure, etc).
3316          *
3317          * @todo This doesn't include category or interlanguage links.
3318          *       Would need to enhance it a bit, "<s>maybe wrap them in XML
3319          *       or something...</s>" that might also require more skin
3320          *       initialization, so check whether that's a problem.
3321          */
3322         function livePreview() {
3323                 global $wgOut;
3324                 $wgOut->disable();
3325                 header( 'Content-type: text/xml; charset=utf-8' );
3326                 header( 'Cache-control: no-cache' );
3327
3328                 $previewText = $this->getPreviewText();
3329                 #$categories = $skin->getCategoryLinks();
3330
3331                 $s =
3332                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3333                 Xml::tags( 'livepreview', null,
3334                         Xml::element( 'preview', null, $previewText )
3335                         #.      Xml::element( 'category', null, $categories )
3336                 );
3337                 echo $s;
3338         }
3339
3340         /**
3341          * Call the stock "user is blocked" page
3342          *
3343          * @deprecated in 1.19; throw an exception directly instead
3344          */
3345         function blockedPage() {
3346                 wfDeprecated( __METHOD__, '1.19' );
3347                 global $wgUser;
3348
3349                 throw new UserBlockedError( $wgUser->getBlock() );
3350         }
3351
3352         /**
3353          * Produce the stock "please login to edit pages" page
3354          *
3355          * @deprecated in 1.19; throw an exception directly instead
3356          */
3357         function userNotLoggedInPage() {
3358                 wfDeprecated( __METHOD__, '1.19' );
3359                 throw new PermissionsError( 'edit' );
3360         }
3361
3362         /**
3363          * Show an error page saying to the user that he has insufficient permissions
3364          * to create a new page
3365          *
3366          * @deprecated in 1.19; throw an exception directly instead
3367          */
3368         function noCreatePermission() {
3369                 wfDeprecated( __METHOD__, '1.19' );
3370                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
3371                 throw new PermissionsError( $permission );
3372         }
3373
3374         /**
3375          * Creates a basic error page which informs the user that
3376          * they have attempted to edit a nonexistent section.
3377          */
3378         function noSuchSectionPage() {
3379                 global $wgOut;
3380
3381                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3382
3383                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
3384                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
3385                 $wgOut->addHTML( $res );
3386
3387                 $wgOut->returnToMain( false, $this->mTitle );
3388         }
3389
3390         /**
3391          * Produce the stock "your edit contains spam" page
3392          *
3393          * @param $match string|bool Text which triggered one or more filters
3394          * @deprecated since 1.17 Use method spamPageWithContent() instead
3395          */
3396         static function spamPage( $match = false ) {
3397                 wfDeprecated( __METHOD__, '1.17' );
3398
3399                 global $wgOut, $wgTitle;
3400
3401                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3402
3403                 $wgOut->addHTML( '<div id="spamprotected">' );
3404                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3405                 if ( $match ) {
3406                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3407                 }
3408                 $wgOut->addHTML( '</div>' );
3409
3410                 $wgOut->returnToMain( false, $wgTitle );
3411         }
3412
3413         /**
3414          * Show "your edit contains spam" page with your diff and text
3415          *
3416          * @param $match string|Array|bool Text (or array of texts) which triggered one or more filters
3417          */
3418         public function spamPageWithContent( $match = false ) {
3419                 global $wgOut, $wgLang;
3420                 $this->textbox2 = $this->textbox1;
3421
3422                 if( is_array( $match ) ){
3423                         $match = $wgLang->listToText( $match );
3424                 }
3425                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3426
3427                 $wgOut->addHTML( '<div id="spamprotected">' );
3428                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3429                 if ( $match ) {
3430                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3431                 }
3432                 $wgOut->addHTML( '</div>' );
3433
3434                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3435                 $this->showDiff();
3436
3437                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3438                 $this->showTextbox2();
3439
3440                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3441         }
3442
3443         /**
3444          * Format an anchor fragment as it would appear for a given section name
3445          * @param $text String
3446          * @return String
3447          * @private
3448          */
3449         function sectionAnchor( $text ) {
3450                 global $wgParser;
3451                 return $wgParser->guessSectionNameFromWikiText( $text );
3452         }
3453
3454         /**
3455          * Check if the browser is on a blacklist of user-agents known to
3456          * mangle UTF-8 data on form submission. Returns true if Unicode
3457          * should make it through, false if it's known to be a problem.
3458          * @return bool
3459          * @private
3460          */
3461         function checkUnicodeCompliantBrowser() {
3462                 global $wgBrowserBlackList, $wgRequest;
3463
3464                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
3465                 if ( $currentbrowser === false ) {
3466                         // No User-Agent header sent? Trust it by default...
3467                         return true;
3468                 }
3469
3470                 foreach ( $wgBrowserBlackList as $browser ) {
3471                         if ( preg_match( $browser, $currentbrowser ) ) {
3472                                 return false;
3473                         }
3474                 }
3475                 return true;
3476         }
3477
3478         /**
3479          * Filter an input field through a Unicode de-armoring process if it
3480          * came from an old browser with known broken Unicode editing issues.
3481          *
3482          * @param $request WebRequest
3483          * @param $field String
3484          * @return String
3485          * @private
3486          */
3487         function safeUnicodeInput( $request, $field ) {
3488                 $text = rtrim( $request->getText( $field ) );
3489                 return $request->getBool( 'safemode' )
3490                         ? $this->unmakesafe( $text )
3491                         : $text;
3492         }
3493
3494         /**
3495          * @param $request WebRequest
3496          * @param $text string
3497          * @return string
3498          */
3499         function safeUnicodeText( $request, $text ) {
3500                 $text = rtrim( $text );
3501                 return $request->getBool( 'safemode' )
3502                         ? $this->unmakesafe( $text )
3503                         : $text;
3504         }
3505
3506         /**
3507          * Filter an output field through a Unicode armoring process if it is
3508          * going to an old browser with known broken Unicode editing issues.
3509          *
3510          * @param $text String
3511          * @return String
3512          * @private
3513          */
3514         function safeUnicodeOutput( $text ) {
3515                 global $wgContLang;
3516                 $codedText = $wgContLang->recodeForEdit( $text );
3517                 return $this->checkUnicodeCompliantBrowser()
3518                         ? $codedText
3519                         : $this->makesafe( $codedText );
3520         }
3521
3522         /**
3523          * A number of web browsers are known to corrupt non-ASCII characters
3524          * in a UTF-8 text editing environment. To protect against this,
3525          * detected browsers will be served an armored version of the text,
3526          * with non-ASCII chars converted to numeric HTML character references.
3527          *
3528          * Preexisting such character references will have a 0 added to them
3529          * to ensure that round-trips do not alter the original data.
3530          *
3531          * @param $invalue String
3532          * @return String
3533          * @private
3534          */
3535         function makesafe( $invalue ) {
3536                 // Armor existing references for reversability.
3537                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
3538
3539                 $bytesleft = 0;
3540                 $result = "";
3541                 $working = 0;
3542                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3543                         $bytevalue = ord( $invalue[$i] );
3544                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
3545                                 $result .= chr( $bytevalue );
3546                                 $bytesleft = 0;
3547                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
3548                                 $working = $working << 6;
3549                                 $working += ( $bytevalue & 0x3F );
3550                                 $bytesleft--;
3551                                 if ( $bytesleft <= 0 ) {
3552                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3553                                 }
3554                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
3555                                 $working = $bytevalue & 0x1F;
3556                                 $bytesleft = 1;
3557                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
3558                                 $working = $bytevalue & 0x0F;
3559                                 $bytesleft = 2;
3560                         } else { // 1111 0xxx
3561                                 $working = $bytevalue & 0x07;
3562                                 $bytesleft = 3;
3563                         }
3564                 }
3565                 return $result;
3566         }
3567
3568         /**
3569          * Reverse the previously applied transliteration of non-ASCII characters
3570          * back to UTF-8. Used to protect data from corruption by broken web browsers
3571          * as listed in $wgBrowserBlackList.
3572          *
3573          * @param $invalue String
3574          * @return String
3575          * @private
3576          */
3577         function unmakesafe( $invalue ) {
3578                 $result = "";
3579                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3580                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
3581                                 $i += 3;
3582                                 $hexstring = "";
3583                                 do {
3584                                         $hexstring .= $invalue[$i];
3585                                         $i++;
3586                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
3587
3588                                 // Do some sanity checks. These aren't needed for reversability,
3589                                 // but should help keep the breakage down if the editor
3590                                 // breaks one of the entities whilst editing.
3591                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) and ( strlen( $hexstring ) <= 6 ) ) {
3592                                         $codepoint = hexdec( $hexstring );
3593                                         $result .= codepointToUtf8( $codepoint );
3594                                 } else {
3595                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
3596                                 }
3597                         } else {
3598                                 $result .= substr( $invalue, $i, 1 );
3599                         }
3600                 }
3601                 // reverse the transform that we made for reversability reasons.
3602                 return strtr( $result, array( "&#x0" => "&#x" ) );
3603         }
3604 }