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 $content_model = null, $content_format = 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->content_model = $this->mTitle->getContentModel();
 257
 258                 $handler = ContentHandler::getForModelID( $this->content_model );
 259                 $this->content_format = $handler->getDefaultFormat(); #NOTE: should be overridden by format of actual revision
 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 changed in
 289          * the future to return $this->mTitle instead.
 290          *
 291          * @return Title object
 292          */
 293         public function getContextTitle() {
 294                 if ( is_null( $this->mContextTitle ) ) {
 295                         global $wgTitle;
 296                         return $wgTitle;
 297                 } else {
 298                         return $this->mContextTitle;
 299                 }
 300         }
 301
 302         function submit() {
 303                 $this->edit();
 304         }
 305
 306         /**
 307          * This is the function that gets called for "action=edit". It
 308          * sets up various member variables, then passes execution to
 309          * another function, usually showEditForm()
 310          *
 311          * The edit form is self-submitting, so that when things like
 312          * preview and edit conflicts occur, we get the same form back
 313          * with the extra stuff added.  Only when the final submission
 314          * is made and all is well do we actually save and redirect to
 315          * the newly-edited page.
 316          */
 317         function edit() {
 318                 global $wgOut, $wgRequest, $wgUser;
 319                 // Allow extensions to modify/prevent this form or submission
 320                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 321                         return;
 322                 }
 323
 324                 wfProfileIn( __METHOD__ );
 325                 wfDebug( __METHOD__ . ": enter\n" );
 326
 327                 // If they used redlink=1 and the page exists, redirect to the main article
 328                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 329                         $wgOut->redirect( $this->mTitle->getFullURL() );
 330                         wfProfileOut( __METHOD__ );
 331                         return;
 332                 }
 333
 334                 $this->importFormData( $wgRequest );
 335                 $this->firsttime = false;
 336
 337                 if ( $this->live ) {
 338                         $this->livePreview();
 339                         wfProfileOut( __METHOD__ );
 340                         return;
 341                 }
 342
 343                 if ( wfReadOnly() && $this->save ) {
 344                         // Force preview
 345                         $this->save = false;
 346                         $this->preview = true;
 347                 }
 348
 349                 if ( $this->save ) {
 350                         $this->formtype = 'save';
 351                 } elseif ( $this->preview ) {
 352                         $this->formtype = 'preview';
 353                 } elseif ( $this->diff ) {
 354                         $this->formtype = 'diff';
 355                 } else { # First time through
 356                         $this->firsttime = true;
 357                         if ( $this->previewOnOpen() ) {
 358                                 $this->formtype = 'preview';
 359                         } else {
 360                                 $this->formtype = 'initial';
 361                         }
 362                 }
 363
 364                 $permErrors = $this->getEditPermissionErrors();
 365                 if ( $permErrors ) {
 366                         wfDebug( __METHOD__ . ": User can't edit\n" );
 367                         // Auto-block user's IP if the account was "hard" blocked
 368                         $wgUser->spreadAnyEditBlock();
 369
 370                         $this->displayPermissionsError( $permErrors );
 371
 372                         wfProfileOut( __METHOD__ );
 373                         return;
 374                 }
 375
 376                 wfProfileIn( __METHOD__ . "-business-end" );
 377
 378                 $this->isConflict = false;
 379                 // css / js subpages of user pages get a special treatment
 380                 $this->isCssJsSubpage       = $this->mTitle->isCssJsSubpage();
 381                 $this->isCssSubpage         = $this->mTitle->isCssSubpage();
 382                 $this->isJsSubpage          = $this->mTitle->isJsSubpage();
 383                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 384                 $this->isNew                = !$this->mTitle->exists() || $this->section == 'new';
 385
 386                 # Show applicable editing introductions
 387                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 388                         $this->showIntro();
 389                 }
 390
 391                 # Attempt submission here.  This will check for edit conflicts,
 392                 # and redundantly check for locked database, blocked IPs, etc.
 393                 # that edit() already checked just in case someone tries to sneak
 394                 # in the back door with a hand-edited submission URL.
 395
 396                 if ( 'save' == $this->formtype ) {
 397                         if ( !$this->attemptSave() ) {
 398                                 wfProfileOut( __METHOD__ . "-business-end" );
 399                                 wfProfileOut( __METHOD__ );
 400                                 return;
 401                         }
 402                 }
 403
 404                 # First time through: get contents, set time for conflict
 405                 # checking, etc.
 406                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 407                         if ( $this->initialiseForm() === false ) {
 408                                 $this->noSuchSectionPage();
 409                                 wfProfileOut( __METHOD__ . "-business-end" );
 410                                 wfProfileOut( __METHOD__ );
 411                                 return;
 412                         }
 413                         if ( !$this->mTitle->getArticleID() )
 414                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 415                         else
 416                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 417                 }
 418
 419                 $this->showEditForm();
 420                 wfProfileOut( __METHOD__ . "-business-end" );
 421                 wfProfileOut( __METHOD__ );
 422         }
 423
 424         /**
 425          * @return array
 426          */
 427         protected function getEditPermissionErrors() {
 428                 global $wgUser;
 429                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 430                 # Can this title be created?
 431                 if ( !$this->mTitle->exists() ) {
 432                         $permErrors = array_merge( $permErrors,
 433                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 434                 }
 435                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 436                 $remove = array();
 437                 foreach ( $permErrors as $error ) {
 438                         if ( ( $this->preview || $this->diff ) &&
 439                                 ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' ) )
 440                         {
 441                                 $remove[] = $error;
 442                         }
 443                 }
 444                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 445                 return $permErrors;
 446         }
 447
 448         /**
 449          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 450          * but with the following differences:
 451          * - If redlink=1, the user will be redirected to the page
 452          * - If there is content to display or the error occurs while either saving,
 453          *   previewing or showing the difference, it will be a
 454          *   "View source for ..." page displaying the source code after the error message.
 455          *
 456          * @since 1.19
 457          * @param $permErrors Array of permissions errors, as returned by
 458          *                    Title::getUserPermissionsErrors().
 459          */
 460         protected function displayPermissionsError( array $permErrors ) {
 461                 global $wgRequest, $wgOut;
 462
 463                 if ( $wgRequest->getBool( 'redlink' ) ) {
 464                         // The edit page was reached via a red link.
 465                         // Redirect to the article page and let them click the edit tab if
 466                         // they really want a permission error.
 467                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 468                         return;
 469                 }
 470
 471                 $content = $this->getContentObject();
 472
 473                 # Use the normal message if there's nothing to display
 474                 if ( $this->firsttime && $content->isEmpty() ) {
 475                         $action = $this->mTitle->exists() ? 'edit' :
 476                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 477                         throw new PermissionsError( $action, $permErrors );
 478                 }
 479
 480                 $wgOut->setPageTitle( wfMessage( 'viewsource-title', $this->getContextTitle()->getPrefixedText() ) );
 481                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 482                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 483                 $wgOut->addHTML( "<hr />\n" );
 484
 485                 # If the user made changes, preserve them when showing the markup
 486                 # (This happens when a user is blocked during edit, for instance)
 487                 if ( !$this->firsttime ) {
 488                         $text = $this->textbox1;
 489                         $wgOut->addWikiMsg( 'viewyourtext' );
 490                 } else {
 491                         $text = $this->toEditText( $content );
 492                         $wgOut->addWikiMsg( 'viewsourcetext' );
 493                 }
 494
 495                 $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 496
 497                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 498                         Linker::formatTemplates( $this->getTemplates() ) ) );
 499
 500                 if ( $this->mTitle->exists() ) {
 501                         $wgOut->returnToMain( null, $this->mTitle );
 502                 }
 503         }
 504
 505         /**
 506          * Show a read-only error
 507          * Parameters are the same as OutputPage:readOnlyPage()
 508          * Redirect to the article page if redlink=1
 509          * @deprecated in 1.19; use displayPermissionsError() instead
 510          */
 511         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 512                 wfDeprecated( __METHOD__, '1.19' );
 513
 514                 global $wgRequest, $wgOut;
 515                 if ( $wgRequest->getBool( 'redlink' ) ) {
 516                         // The edit page was reached via a red link.
 517                         // Redirect to the article page and let them click the edit tab if
 518                         // they really want a permission error.
 519                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 520                 } else {
 521                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 522                 }
 523         }
 524
 525         /**
 526          * Should we show a preview when the edit form is first shown?
 527          *
 528          * @return bool
 529          */
 530         protected function previewOnOpen() {
 531                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 532                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 533                         // Explicit override from request
 534                         return true;
 535                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 536                         // Explicit override from request
 537                         return false;
 538                 } elseif ( $this->section == 'new' ) {
 539                         // Nothing *to* preview for new sections
 540                         return false;
 541                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 542                         // Standard preference behaviour
 543                         return true;
 544                 } elseif ( !$this->mTitle->exists() &&
 545                   isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] ) &&
 546                   $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 547                 {
 548                         // Categories are special
 549                         return true;
 550                 } else {
 551                         return false;
 552                 }
 553         }
 554
 555         /**
 556          * Checks whether the user entered a skin name in uppercase,
 557          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 558          *
 559          * @return bool
 560          */
 561         protected function isWrongCaseCssJsPage() {
 562                 if ( $this->mTitle->isCssJsSubpage() ) {
 563                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 564                         $skins = array_merge(
 565                                 array_keys( Skin::getSkinNames() ),
 566                                 array( 'common' )
 567                         );
 568                         return !in_array( $name, $skins )
 569                                 && in_array( strtolower( $name ), $skins );
 570                 } else {
 571                         return false;
 572                 }
 573         }
 574
 575         /**
 576          * Does this EditPage class support section editing?
 577          * This is used by EditPage subclasses to indicate their ui cannot handle section edits
 578          *
 579          * @return bool
 580          */
 581         protected function isSectionEditSupported() {
 582                 return true;
 583         }
 584
 585         /**
 586          * This function collects the form data and uses it to populate various member variables.
 587          * @param $request WebRequest
 588          */
 589         function importFormData( &$request ) {
 590                 global $wgLang, $wgUser;
 591
 592                 wfProfileIn( __METHOD__ );
 593
 594                 # Section edit can come from either the form or a link
 595                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 596
 597                 if ( $request->wasPosted() ) {
 598                         # These fields need to be checked for encoding.
 599                         # Also remove trailing whitespace, but don't remove _initial_
 600                         # whitespace from the text boxes. This may be significant formatting.
 601                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 602                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 603                                 // Skip this if wpTextbox2 has input, it indicates that we came
 604                                 // from a conflict page with raw page text, not a custom form
 605                                 // modified by subclasses
 606                                 wfProfileIn( get_class( $this ) . "::importContentFormData" );
 607                                 $textbox1 = $this->importContentFormData( $request );
 608                                 if ( isset( $textbox1 ) )
 609                                         $this->textbox1 = $textbox1;
 610                                 wfProfileOut( get_class( $this ) . "::importContentFormData" );
 611                         }
 612
 613                         # Truncate for whole multibyte characters
 614                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary' ), 255 );
 615
 616                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 617                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 618                         # section titles.
 619                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 620
 621                         # Treat sectiontitle the same way as summary.
 622                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 623                         # currently doing double duty as both edit summary and section title. Right now this
 624                         # is just to allow API edits to work around this limitation, but this should be
 625                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 626                         $this->sectiontitle = $wgLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 627                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 628
 629                         $this->edittime = $request->getVal( 'wpEdittime' );
 630                         $this->starttime = $request->getVal( 'wpStarttime' );
 631
 632                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 633
 634                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 635                                 // wpTextbox1 field is missing, possibly due to being "too big"
 636                                 // according to some filter rules such as Suhosin's setting for
 637                                 // suhosin.request.max_value_length (d'oh)
 638                                 $this->incompleteForm = true;
 639                         } else {
 640                                 // edittime should be one of our last fields; if it's missing,
 641                                 // the submission probably broke somewhere in the middle.
 642                                 $this->incompleteForm = is_null( $this->edittime );
 643                         }
 644                         if ( $this->incompleteForm ) {
 645                                 # If the form is incomplete, force to preview.
 646                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 647                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 648                                 $this->preview = true;
 649                         } else {
 650                                 /* Fallback for live preview */
 651                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 652                                 $this->diff = $request->getCheck( 'wpDiff' );
 653
 654                                 // Remember whether a save was requested, so we can indicate
 655                                 // if we forced preview due to session failure.
 656                                 $this->mTriedSave = !$this->preview;
 657
 658                                 if ( $this->tokenOk( $request ) ) {
 659                                         # Some browsers will not report any submit button
 660                                         # if the user hits enter in the comment box.
 661                                         # The unmarked state will be assumed to be a save,
 662                                         # if the form seems otherwise complete.
 663                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 664                                 } elseif ( $this->diff ) {
 665                                         # Failed token check, but only requested "Show Changes".
 666                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 667                                 } else {
 668                                         # Page might be a hack attempt posted from
 669                                         # an external site. Preview instead of saving.
 670                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 671                                         $this->preview = true;
 672                                 }
 673                         }
 674                         $this->save = !$this->preview && !$this->diff;
 675                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 676                                 $this->edittime = null;
 677                         }
 678
 679                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 680                                 $this->starttime = null;
 681                         }
 682
 683                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 684
 685                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 686                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 687
 688                         # Don't force edit summaries when a user is editing their own user or talk page
 689                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 690                                 $this->mTitle->getText() == $wgUser->getName() )
 691                         {
 692                                 $this->allowBlankSummary = true;
 693                         } else {
 694                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary' );
 695                         }
 696
 697                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 698                 } else {
 699                         # Not a posted form? Start with nothing.
 700                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 701                         $this->textbox1     = '';
 702                         $this->summary      = '';
 703                         $this->sectiontitle = '';
 704                         $this->edittime     = '';
 705                         $this->starttime    = wfTimestampNow();
 706                         $this->edit         = false;
 707                         $this->preview      = false;
 708                         $this->save         = false;
 709                         $this->diff         = false;
 710                         $this->minoredit    = false;
 711                         $this->watchthis    = $request->getBool( 'watchthis', false ); // Watch may be overriden by request parameters
 712                         $this->recreate     = false;
 713
 714                         // When creating a new section, we can preload a section title by passing it as the
 715                         // preloadtitle parameter in the URL (Bug 13100)
 716                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 717                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 718                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 719                                 $this->summary = $request->getVal( 'preloadtitle' );
 720                         }
 721                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 722                                 $this->summary = $request->getText( 'summary' );
 723                                 if ( $this->summary !== '' ) {
 724                                         $this->hasPresetSummary = true;
 725                                 }
 726                         }
 727
 728                         if ( $request->getVal( 'minor' ) ) {
 729                                 $this->minoredit = true;
 730                         }
 731                 }
 732
 733                 $this->oldid = $request->getInt( 'oldid' );
 734
 735                 $this->bot = $request->getBool( 'bot', true );
 736                 $this->nosummary = $request->getBool( 'nosummary' );
 737
 738                 $content_handler = ContentHandler::getForTitle( $this->mTitle );
 739                 $this->content_model = $request->getText( 'model', $content_handler->getModelID() ); #may be overridden by revision
 740                 $this->content_format = $request->getText( 'format', $content_handler->getDefaultFormat() ); #may be overridden by revision
 741
 742                 #TODO: check if the desired model is allowed in this namespace, and if a transition from the page's current model to the new model is allowed
 743                 #TODO: check if the desired content model supports the given content format!
 744
 745                 $this->live = $request->getCheck( 'live' );
 746                 $this->editintro = $request->getText( 'editintro',
 747                         // Custom edit intro for new sections
 748                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 749
 750                 // Allow extensions to modify form data
 751                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 752
 753                 wfProfileOut( __METHOD__ );
 754         }
 755
 756         /**
 757          * Subpage overridable method for extracting the page content data from the
 758          * posted form to be placed in $this->textbox1, if using customized input
 759          * this method should be overrided and return the page text that will be used
 760          * for saving, preview parsing and so on...
 761          *
 762          * @param $request WebRequest
 763          */
 764         protected function importContentFormData( &$request ) {
 765                 return; // Don't do anything, EditPage already extracted wpTextbox1
 766         }
 767
 768         /**
 769          * Initialise form fields in the object
 770          * Called on the first invocation, e.g. when a user clicks an edit link
 771          * @return bool -- if the requested section is valid
 772          */
 773         function initialiseForm() {
 774                 global $wgUser;
 775                 $this->edittime = $this->mArticle->getTimestamp();
 776
 777                 $content = $this->getContentObject( false ); #TODO: track content object?!
 778                 $this->textbox1 = $this->toEditText( $content );
 779
 780                 // activate checkboxes if user wants them to be always active
 781                 # Sort out the "watch" checkbox
 782                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 783                         # Watch all edits
 784                         $this->watchthis = true;
 785                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 786                         # Watch creations
 787                         $this->watchthis = true;
 788                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
 789                         # Already watched
 790                         $this->watchthis = true;
 791                 }
 792                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 793                         $this->minoredit = true;
 794                 }
 795                 if ( $this->textbox1 === false ) {
 796                         return false;
 797                 }
 798                 wfProxyCheck();
 799                 return true;
 800         }
 801
 802         /**
 803          * Fetch initial editing page content.
 804          *
 805          * @param $def_text string
 806          * @return mixed string on success, $def_text for invalid sections
 807          * @private
 808          * @deprecated since 1.WD
 809          * @todo: deprecated, replace usage everywhere
 810          */
 811         function getContent( $def_text = false ) {
 812                 wfDeprecated( __METHOD__, '1.WD' );
 813
 814                 if ( $def_text !== null && $def_text !== false && $def_text !== '' ) {
 815                         $def_content = $this->toEditContent( $def_text );
 816                 } else {
 817                         $def_content = false;
 818                 }
 819
 820                 $content = $this->getContentObject( $def_content );
 821
 822                 // Note: EditPage should only be used with text based content anyway.
 823                 return $this->toEditText( $content );
 824         }
 825
 826         private function getContentObject( $def_content = null ) {
 827                 global $wgOut, $wgRequest;
 828
 829                 wfProfileIn( __METHOD__ );
 830
 831                 $content = false;
 832
 833                 // For message page not locally set, use the i18n message.
 834                 // For other non-existent articles, use preload text if any.
 835                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
 836                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
 837                                 # If this is a system message, get the default text.
 838                                 $msg = $this->mTitle->getDefaultMessageText();
 839
 840                                 $content = $this->toEditContent( $msg );
 841                         }
 842                         if ( $content === false ) {
 843                                 # If requested, preload some text.
 844                                 $preload = $wgRequest->getVal( 'preload',
 845                                         // Custom preload text for new sections
 846                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 847
 848                                 $content = $this->getPreloadedContent( $preload );
 849                         }
 850                 // For existing pages, get text based on "undo" or section parameters.
 851                 } else {
 852                         if ( $this->section != '' ) {
 853                                 // Get section edit text (returns $def_text for invalid sections)
 854                                 $orig = $this->getOriginalContent();
 855                                 $content = $orig ? $orig->getSection( $this->section ) : null;
 856
 857                                 if ( !$content ) $content = $def_content;
 858                         } else {
 859                                 $undoafter = $wgRequest->getInt( 'undoafter' );
 860                                 $undo = $wgRequest->getInt( 'undo' );
 861
 862                                 if ( $undo > 0 && $undoafter > 0 ) {
 863                                         if ( $undo < $undoafter ) {
 864                                                 # If they got undoafter and undo round the wrong way, switch them
 865                                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 866                                         }
 867
 868                                         $undorev = Revision::newFromId( $undo );
 869                                         $oldrev = Revision::newFromId( $undoafter );
 870
 871                                         # Sanity check, make sure it's the right page,
 872                                         # the revisions exist and they were not deleted.
 873                                         # Otherwise, $content will be left as-is.
 874                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 875                                                 $undorev->getPage() == $oldrev->getPage() &&
 876                                                 $undorev->getPage() == $this->mTitle->getArticleID() &&
 877                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 878                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 879
 880                                                 $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
 881
 882                                                 if ( $content === false ) {
 883                                                         # Warn the user that something went wrong
 884                                                         $undoMsg = 'failure';
 885                                                 } else {
 886                                                         # Inform the user of our success and set an automatic edit summary
 887                                                         $undoMsg = 'success';
 888
 889                                                         # If we just undid one rev, use an autosummary
 890                                                         $firstrev = $oldrev->getNext();
 891                                                         if ( $firstrev && $firstrev->getId() == $undo ) {
 892                                                                 $undoSummary = wfMessage( 'undo-summary', $undo, $undorev->getUserText() )->inContentLanguage()->text();
 893                                                                 if ( $this->summary === '' ) {
 894                                                                         $this->summary = $undoSummary;
 895                                                                 } else {
 896                                                                         $this->summary = $undoSummary . wfMessage( 'colon-separator' )
 897                                                                                 ->inContentLanguage()->text() . $this->summary;
 898                                                                 }
 899                                                                 $this->undidRev = $undo;
 900                                                         }
 901                                                         $this->formtype = 'diff';
 902                                                 }
 903                                         } else {
 904                                                 // Failed basic sanity checks.
 905                                                 // Older revisions may have been removed since the link
 906                                                 // was created, or we may simply have got bogus input.
 907                                                 $undoMsg = 'norev';
 908                                         }
 909
 910                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
 911                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
 912                                                 wfMessage( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
 913                                 }
 914
 915                                 if ( $content === false ) {
 916                                         $content = $this->getOriginalContent();
 917                                 }
 918                         }
 919                 }
 920
 921                 wfProfileOut( __METHOD__ );
 922                 return $content;
 923         }
 924
 925         /**
 926          * Get the content of the wanted revision, without section extraction.
 927          *
 928          * The result of this function can be used to compare user's input with
 929          * section replaced in its context (using WikiPage::replaceSection())
 930          * to the original text of the edit.
 931          *
 932          * This difers from Article::getContent() that when a missing revision is
 933          * encountered the result will be an empty string and not the
 934          * 'missing-revision' message.
 935          *
 936          * @since 1.19
 937          * @return string
 938          */
 939         private function getOriginalContent() {
 940                 if ( $this->section == 'new' ) {
 941                         return $this->getCurrentContent();
 942                 }
 943                 $revision = $this->mArticle->getRevisionFetched();
 944                 if ( $revision === null ) {
 945                         if ( !$this->content_model ) $this->content_model = $this->getTitle()->getContentModel();
 946                         $handler = ContentHandler::getForModelID( $this->content_model );
 947
 948                         return $handler->makeEmptyContent();
 949                 }
 950                 $content = $revision->getContent();
 951                 return $content;
 952         }
 953
 954         /**
 955          * Get the current content of the page. This is basically similar to
 956          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
 957          * content object is returned instead of null.
 958          *
 959          * @since 1.WD
 960          * @return string
 961          */
 962         private function getCurrentContent() {
 963                 $rev = $this->mArticle->getRevision();
 964                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
 965
 966                 if ( $content  === false || $content === null ) {
 967                         if ( !$this->content_model ) $this->content_model = $this->getTitle()->getContentModel();
 968                         $handler = ContentHandler::getForModelID( $this->content_model );
 969
 970                         return $handler->makeEmptyContent();
 971                 } else {
 972                         # nasty side-effect, but needed for consistency
 973                         $this->content_model = $rev->getContentModel();
 974                         $this->content_format = $rev->getContentFormat();
 975
 976                         return $content;
 977                 }
 978         }
 979
 980
 981         /**
 982          * Use this method before edit() to preload some text into the edit box
 983          *
 984          * @param $text string
 985          * @deprecated since 1.WD
 986          */
 987         public function setPreloadedText( $text ) {
 988                 wfDeprecated( __METHOD__, "1.WD" );
 989
 990                 $content = $this->toEditContent( $text );
 991
 992                 $this->setPreloadedContent( $content );
 993         }
 994
 995         /**
 996          * Use this method before edit() to preload some content into the edit box
 997          *
 998          * @param $content Content
 999          *
1000          * @since 1.WD
1001          */
1002         public function setPreloadedContent( Content $content ) {
1003                 $this->mPreloadedContent = $content;
1004         }
1005
1006         /**
1007          * Get the contents to be preloaded into the box, either set by
1008          * an earlier setPreloadText() or by loading the given page.
1009          *
1010          * @param $preload String: representing the title to preload from.
1011          *
1012          * @return String
1013          *
1014          * @deprecated since 1.WD, use getPreloadedContent() instead
1015          */
1016         protected function getPreloadedText( $preload ) { #NOTE: B/C only, replace usage!
1017                 wfDeprecated( __METHOD__, "1.WD" );
1018
1019                 $content = $this->getPreloadedContent( $preload );
1020                 $text = $this->toEditText( $content );
1021
1022                 return $text;
1023         }
1024
1025         /**
1026          * Get the contents to be preloaded into the box, either set by
1027          * an earlier setPreloadText() or by loading the given page.
1028          *
1029          * @param $preload String: representing the title to preload from.
1030          *
1031          * @return Content
1032          *
1033          * @since 1.WD
1034          */
1035         protected function getPreloadedContent( $preload ) { #@todo: use this!
1036                 global $wgUser;
1037
1038                 if ( !empty( $this->mPreloadContent ) ) {
1039                         return $this->mPreloadContent;
1040                 }
1041
1042                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1043
1044                 if ( $preload === '' ) {
1045                         return $handler->makeEmptyContent();
1046                 }
1047
1048                 $title = Title::newFromText( $preload );
1049                 # Check for existence to avoid getting MediaWiki:Noarticletext
1050                 if ( $title === null || !$title->exists() || !$title->userCan( 'read' ) ) {
1051                         return $handler->makeEmptyContent();
1052                 }
1053
1054                 $page = WikiPage::factory( $title );
1055                 if ( $page->isRedirect() ) {
1056                         $title = $page->getRedirectTarget();
1057                         # Same as before
1058                         if ( $title === null || !$title->exists() || !$title->userCan( 'read' ) ) {
1059                                 return $handler->makeEmptyContent();
1060                         }
1061                         $page = WikiPage::factory( $title );
1062                 }
1063
1064                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1065                 $content = $page->getContent( Revision::RAW );
1066
1067                 return $content->preloadTransform( $title, $parserOptions );
1068         }
1069
1070         /**
1071          * Make sure the form isn't faking a user's credentials.
1072          *
1073          * @param $request WebRequest
1074          * @return bool
1075          * @private
1076          */
1077         function tokenOk( &$request ) {
1078                 global $wgUser;
1079                 $token = $request->getVal( 'wpEditToken' );
1080                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1081                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1082                 return $this->mTokenOk;
1083         }
1084
1085         /**
1086          * Attempt submission
1087          * @return bool false if output is done, true if the rest of the form should be displayed
1088          */
1089         function attemptSave() {
1090                 global $wgUser, $wgOut;
1091
1092                 $resultDetails = false;
1093                 # Allow bots to exempt some edits from bot flagging
1094                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1095                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1096                 // FIXME: once the interface for internalAttemptSave() is made nicer, this should use the message in $status
1097                 if ( $status->value == self::AS_SUCCESS_UPDATE || $status->value == self::AS_SUCCESS_NEW_ARTICLE ) {
1098                         $this->didSave = true;
1099                 }
1100
1101                 switch ( $status->value ) {
1102                         case self::AS_HOOK_ERROR_EXPECTED:
1103                         case self::AS_CONTENT_TOO_BIG:
1104                         case self::AS_ARTICLE_WAS_DELETED:
1105                         case self::AS_CONFLICT_DETECTED:
1106                         case self::AS_SUMMARY_NEEDED:
1107                         case self::AS_TEXTBOX_EMPTY:
1108                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1109                         case self::AS_END:
1110                                 return true;
1111
1112                         case self::AS_HOOK_ERROR:
1113                                 return false;
1114
1115                         case self::AS_PARSE_ERROR:
1116                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>');
1117                                 return true;
1118
1119                         case self::AS_SUCCESS_NEW_ARTICLE:
1120                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1121                                 $anchor = isset ( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1122                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1123                                 return false;
1124
1125                         case self::AS_SUCCESS_UPDATE:
1126                                 $extraQuery = '';
1127                                 $sectionanchor = $resultDetails['sectionanchor'];
1128
1129                                 // Give extensions a chance to modify URL query on update
1130                                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this->mArticle, &$sectionanchor, &$extraQuery ) );
1131
1132                                 if ( $resultDetails['redirect'] ) {
1133                                         if ( $extraQuery == '' ) {
1134                                                 $extraQuery = 'redirect=no';
1135                                         } else {
1136                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1137                                         }
1138                                 }
1139                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1140                                 return false;
1141
1142                         case self::AS_BLANK_ARTICLE:
1143                                 $wgOut->redirect( $this->getContextTitle()->getFullURL() );
1144                                 return false;
1145
1146                         case self::AS_SPAM_ERROR:
1147                                 $this->spamPageWithContent( $resultDetails['spam'] );
1148                                 return false;
1149
1150                         case self::AS_BLOCKED_PAGE_FOR_USER:
1151                                 throw new UserBlockedError( $wgUser->getBlock() );
1152
1153                         case self::AS_IMAGE_REDIRECT_ANON:
1154                         case self::AS_IMAGE_REDIRECT_LOGGED:
1155                                 throw new PermissionsError( 'upload' );
1156
1157                         case self::AS_READ_ONLY_PAGE_ANON:
1158                         case self::AS_READ_ONLY_PAGE_LOGGED:
1159                                 throw new PermissionsError( 'edit' );
1160
1161                         case self::AS_READ_ONLY_PAGE:
1162                                 throw new ReadOnlyError;
1163
1164                         case self::AS_RATE_LIMITED:
1165                                 throw new ThrottledError();
1166
1167                         case self::AS_NO_CREATE_PERMISSION:
1168                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1169                                 throw new PermissionsError( $permission );
1170
1171                         default:
1172                                 // We don't recognize $status->value. The only way that can happen
1173                                 // is if an extension hook aborted from inside ArticleSave.
1174                                 // Render the status object into $this->hookError
1175                                 // FIXME this sucks, we should just use the Status object throughout
1176                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1177                                         '</div>';
1178                                 return true;
1179                 }
1180         }
1181
1182         /**
1183          * Attempt submission (no UI)
1184          *
1185          * @param $result
1186          * @param $bot bool
1187          *
1188          * @return Status object, possibly with a message, but always with one of the AS_* constants in $status->value,
1189          *
1190          * FIXME: This interface is TERRIBLE, but hard to get rid of due to various error display idiosyncrasies. There are
1191          * also lots of cases where error metadata is set in the object and retrieved later instead of being returned, e.g.
1192          * AS_CONTENT_TOO_BIG and AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some time.
1193          */
1194         function internalAttemptSave( &$result, $bot = false ) {
1195                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1196
1197                 $status = Status::newGood();
1198
1199                 wfProfileIn( __METHOD__  );
1200                 wfProfileIn( __METHOD__ . '-checks' );
1201
1202                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
1203                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1204                         $status->fatal( 'hookaborted' );
1205                         $status->value = self::AS_HOOK_ERROR;
1206                         wfProfileOut( __METHOD__ . '-checks' );
1207                         wfProfileOut( __METHOD__  );
1208                         return $status;
1209                 }
1210
1211                 try {
1212                         # Construct Content object
1213                         $textbox_content = $this->toEditContent( $this->textbox1 );
1214                 } catch (MWContentSerializationException $ex) {
1215                         $status->fatal( 'content-failed-to-parse', $this->content_model, $this->content_format, $ex->getMessage() );
1216                         $status->value = self::AS_PARSE_ERROR;
1217                         wfProfileOut( __METHOD__ );
1218                         return $status;
1219                 }
1220
1221                 # Check image redirect
1222                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1223                         $textbox_content->isRedirect() &&
1224                         !$wgUser->isAllowed( 'upload' ) ) {
1225                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1226                                 $status->setResult( false, $code );
1227
1228                                 wfProfileOut( __METHOD__ . '-checks' );
1229                                 wfProfileOut( __METHOD__  );
1230
1231                                 return $status;
1232                 }
1233
1234                 # Check for spam
1235                 $match = self::matchSummarySpamRegex( $this->summary );
1236                 if ( $match === false ) {
1237                         $match = self::matchSpamRegex( $this->textbox1 );
1238                 }
1239                 if ( $match !== false ) {
1240                         $result['spam'] = $match;
1241                         $ip = $wgRequest->getIP();
1242                         $pdbk = $this->mTitle->getPrefixedDBkey();
1243                         $match = str_replace( "\n", '', $match );
1244                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1245                         $status->fatal( 'spamprotectionmatch', $match );
1246                         $status->value = self::AS_SPAM_ERROR;
1247                         wfProfileOut( __METHOD__ . '-checks' );
1248                         wfProfileOut( __METHOD__ );
1249                         return $status;
1250                 }
1251                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
1252                         # Error messages etc. could be handled within the hook...
1253                         $status->fatal( 'hookaborted' );
1254                         $status->value = self::AS_HOOK_ERROR;
1255                         wfProfileOut( __METHOD__ . '-checks' );
1256                         wfProfileOut( __METHOD__ );
1257                         return $status;
1258                 } elseif ( $this->hookError != '' ) {
1259                         # ...or the hook could be expecting us to produce an error
1260                         $status->fatal( 'hookaborted' );
1261                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1262                         wfProfileOut( __METHOD__ . '-checks' );
1263                         wfProfileOut( __METHOD__ );
1264                         return $status;
1265                 }
1266
1267                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1268                         // Auto-block user's IP if the account was "hard" blocked
1269                         $wgUser->spreadAnyEditBlock();
1270                         # Check block state against master, thus 'false'.
1271                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1272                         wfProfileOut( __METHOD__ . '-checks' );
1273                         wfProfileOut( __METHOD__ );
1274                         return $status;
1275                 }
1276
1277                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1278                 if ( $this->kblength > $wgMaxArticleSize ) {
1279                         // Error will be displayed by showEditForm()
1280                         $this->tooBig = true;
1281                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1282                         wfProfileOut( __METHOD__ . '-checks' );
1283                         wfProfileOut( __METHOD__ );
1284                         return $status;
1285                 }
1286
1287                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1288                         if ( $wgUser->isAnon() ) {
1289                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1290                                 wfProfileOut( __METHOD__ . '-checks' );
1291                                 wfProfileOut( __METHOD__ );
1292                                 return $status;
1293                         } else {
1294                                 $status->fatal( 'readonlytext' );
1295                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1296                                 wfProfileOut( __METHOD__ . '-checks' );
1297                                 wfProfileOut( __METHOD__ );
1298                                 return $status;
1299                         }
1300                 }
1301
1302                 if ( wfReadOnly() ) {
1303                         $status->fatal( 'readonlytext' );
1304                         $status->value = self::AS_READ_ONLY_PAGE;
1305                         wfProfileOut( __METHOD__ . '-checks' );
1306                         wfProfileOut( __METHOD__ );
1307                         return $status;
1308                 }
1309                 if ( $wgUser->pingLimiter() ) {
1310                         $status->fatal( 'actionthrottledtext' );
1311                         $status->value = self::AS_RATE_LIMITED;
1312                         wfProfileOut( __METHOD__ . '-checks' );
1313                         wfProfileOut( __METHOD__ );
1314                         return $status;
1315                 }
1316
1317                 # If the article has been deleted while editing, don't save it without
1318                 # confirmation
1319                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1320                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1321                         wfProfileOut( __METHOD__ . '-checks' );
1322                         wfProfileOut( __METHOD__ );
1323                         return $status;
1324                 }
1325
1326                 wfProfileOut( __METHOD__ . '-checks' );
1327
1328                 # Load the page data from the master. If anything changes in the meantime,
1329                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1330                 $this->mArticle->loadPageData( 'fromdbmaster' );
1331                 $new = !$this->mArticle->exists();
1332
1333                 if ( $new ) {
1334                         // Late check for create permission, just in case *PARANOIA*
1335                         if ( !$this->mTitle->userCan( 'create' ) ) {
1336                                 $status->fatal( 'nocreatetext' );
1337                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1338                                 wfDebug( __METHOD__ . ": no create permission\n" );
1339                                 wfProfileOut( __METHOD__ );
1340                                 return $status;
1341                         }
1342
1343                         # Don't save a new article if it's blank.
1344                         if ( $this->textbox1 == '' ) {
1345                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1346                                 wfProfileOut( __METHOD__ );
1347                                 return $status;
1348                         }
1349
1350                         // Run post-section-merge edit filter
1351                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
1352                                 # Error messages etc. could be handled within the hook...
1353                                 $status->fatal( 'hookaborted' );
1354                                 $status->value = self::AS_HOOK_ERROR;
1355                                 wfProfileOut( __METHOD__ );
1356                                 return $status;
1357                         } elseif ( $this->hookError != '' ) {
1358                                 # ...or the hook could be expecting us to produce an error
1359                                 $status->fatal( 'hookaborted' );
1360                                 $status->value = self::AS_HOOK_ERROR_EXPECTED;
1361                                 wfProfileOut( __METHOD__ );
1362                                 return $status;
1363                         }
1364
1365                         $content = $textbox_content;
1366
1367                         $result['sectionanchor'] = '';
1368                         if ( $this->section == 'new' ) {
1369                                 if ( $this->sectiontitle !== '' ) {
1370                                         // Insert the section title above the content.
1371                                         $content = $content->addSectionHeader( $this->sectiontitle );
1372
1373                                         // Jump to the new section
1374                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1375
1376                                         // If no edit summary was specified, create one automatically from the section
1377                                         // title and have it link to the new section. Otherwise, respect the summary as
1378                                         // passed.
1379                                         if ( $this->summary === '' ) {
1380                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1381                                                 $this->summary = wfMessage( 'newsectionsummary', $cleanSectionTitle )
1382                                                         ->inContentLanguage()->text() ;
1383                                         }
1384                                 } elseif ( $this->summary !== '' ) {
1385                                         // Insert the section title above the content.
1386                                         $content = $content->addSectionHeader( $this->summary );
1387
1388                                         // Jump to the new section
1389                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1390
1391                                         // Create a link to the new section from the edit summary.
1392                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1393                                         $this->summary = wfMessage( 'newsectionsummary', $cleanSummary )
1394                                                 ->inContentLanguage()->text();
1395                                 }
1396                         }
1397
1398                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1399
1400                 } else { # not $new
1401
1402                         # Article exists. Check for edit conflict.
1403
1404                         $this->mArticle->clear(); # Force reload of dates, etc.
1405                         $timestamp = $this->mArticle->getTimestamp();
1406
1407                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1408
1409                         if ( $timestamp != $this->edittime ) {
1410                                 $this->isConflict = true;
1411                                 if ( $this->section == 'new' ) {
1412                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1413                                                 $this->mArticle->getComment() == $this->summary ) {
1414                                                 // Probably a duplicate submission of a new comment.
1415                                                 // This can happen when squid resends a request after
1416                                                 // a timeout but the first one actually went through.
1417                                                 wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
1418                                         } else {
1419                                                 // New comment; suppress conflict.
1420                                                 $this->isConflict = false;
1421                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1422                                         }
1423                                 } elseif ( $this->section == '' && $this->userWasLastToEdit( $wgUser->getId(), $this->edittime ) ) {
1424                                         # Suppress edit conflict with self, except for section edits where merging is required.
1425                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1426                                         $this->isConflict = false;
1427                                 }
1428                         }
1429
1430                         // If sectiontitle is set, use it, otherwise use the summary as the section title (for
1431                         // backwards compatibility with old forms/bots).
1432                         if ( $this->sectiontitle !== '' ) {
1433                                 $sectionTitle = $this->sectiontitle;
1434                         } else {
1435                                 $sectionTitle = $this->summary;
1436                         }
1437
1438                         $content = null;
1439
1440                         if ( $this->isConflict ) {
1441                                 wfDebug( __METHOD__ . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1442                                                 . " (article time '{$timestamp}')\n" );
1443
1444                                 $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content,
1445                                                                                                                                         $sectionTitle, $this->edittime );
1446                         } else {
1447                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1448                                 $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle );
1449                         }
1450
1451                         if ( is_null( $content ) ) {
1452                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1453                                 $this->isConflict = true;
1454                                 $content = $textbox_content; // do not try to merge here!
1455                         } elseif ( $this->isConflict ) {
1456                                 # Attempt merge
1457                                 if ( $this->mergeChangesIntoContent( $textbox_content ) ) {
1458                                         // Successful merge! Maybe we should tell the user the good news?
1459                                         $this->isConflict = false;
1460                                         $content = $textbox_content;
1461                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1462                                 } else {
1463                                         $this->section = '';
1464                                         #$this->textbox1 = $text; #redundant, nothing to do here?
1465                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1466                                 }
1467                         }
1468
1469                         if ( $this->isConflict ) {
1470                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1471                                 wfProfileOut( __METHOD__ );
1472                                 return $status;
1473                         }
1474
1475                         // Run post-section-merge edit filter
1476                         $hook_args = array( $this, $content, &$this->hookError, $this->summary );
1477
1478                         if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged', $hook_args )
1479                                 || !wfRunHooks( 'EditFilterMergedContent', $hook_args ) ) {
1480                                 # Error messages etc. could be handled within the hook...
1481                                 $status->fatal( 'hookaborted' );
1482                                 $status->value = self::AS_HOOK_ERROR;
1483                                 wfProfileOut( __METHOD__ );
1484                                 return $status;
1485                         } elseif ( $this->hookError != '' ) {
1486                                 # ...or the hook could be expecting us to produce an error
1487                                 $status->fatal( 'hookaborted' );
1488                                 $status->value = self::AS_HOOK_ERROR_EXPECTED;
1489                                 wfProfileOut( __METHOD__ );
1490                                 return $status;
1491                         }
1492
1493                         # Handle the user preference to force summaries here, but not for null edits
1494                         if ( $this->section != 'new' && !$this->allowBlankSummary
1495                                 && !$content->equals( $this->getOriginalContent() )
1496                                 && !$content->isRedirect() ) # check if it's not a redirect
1497                         {
1498                                 if ( md5( $this->summary ) == $this->autoSumm ) {
1499                                         $this->missingSummary = true;
1500                                         $status->fatal( 'missingsummary' );
1501                                         $status->value = self::AS_SUMMARY_NEEDED;
1502                                         wfProfileOut( __METHOD__ );
1503                                         return $status;
1504                                 }
1505                         }
1506
1507                         # And a similar thing for new sections
1508                         if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1509                                 if ( trim( $this->summary ) == '' ) {
1510                                         $this->missingSummary = true;
1511                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1512                                         $status->value = self::AS_SUMMARY_NEEDED;
1513                                         wfProfileOut( __METHOD__ );
1514                                         return $status;
1515                                 }
1516                         }
1517
1518                         # All's well
1519                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1520                         $sectionanchor = '';
1521                         if ( $this->section == 'new' ) {
1522                                 if ( $this->textbox1 == '' ) {
1523                                         $this->missingComment = true;
1524                                         $status->fatal( 'missingcommenttext' );
1525                                         $status->value = self::AS_TEXTBOX_EMPTY;
1526                                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1527                                         wfProfileOut( __METHOD__ );
1528                                         return $status;
1529                                 }
1530                                 if ( $this->sectiontitle !== '' ) {
1531                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1532                                         // If no edit summary was specified, create one automatically from the section
1533                                         // title and have it link to the new section. Otherwise, respect the summary as
1534                                         // passed.
1535                                         if ( $this->summary === '' ) {
1536                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1537                                                 $this->summary = wfMessage( 'newsectionsummary', $cleanSectionTitle )
1538                                                         ->inContentLanguage()->text();
1539                                         }
1540                                 } elseif ( $this->summary !== '' ) {
1541                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1542                                         # This is a new section, so create a link to the new section
1543                                         # in the revision summary.
1544                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1545                                         $this->summary = wfMessage( 'newsectionsummary', $cleanSummary )
1546                                                 ->inContentLanguage()->text();
1547                                 }
1548                         } elseif ( $this->section != '' ) {
1549                                 # Try to get a section anchor from the section source, redirect to edited section if header found
1550                                 # XXX: might be better to integrate this into Article::replaceSection
1551                                 # for duplicate heading checking and maybe parsing
1552                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1553                                 # we can't deal with anchors, includes, html etc in the header for now,
1554                                 # headline would need to be parsed to improve this
1555                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1556                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1557                                 }
1558                         }
1559                         $result['sectionanchor'] = $sectionanchor;
1560                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1561
1562                         // Save errors may fall down to the edit form, but we've now
1563                         // merged the section into full text. Clear the section field
1564                         // so that later submission of conflict forms won't try to
1565                         // replace that into a duplicated mess.
1566                         $this->textbox1 = $this->toEditText( $content );
1567                         $this->section = '';
1568
1569                         $status->value = self::AS_SUCCESS_UPDATE;
1570                 }
1571
1572                 // Check for length errors again now that the section is merged in
1573                         $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1574                 if ( $this->kblength > $wgMaxArticleSize ) {
1575                         $this->tooBig = true;
1576                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1577                         wfProfileOut( __METHOD__ );
1578                         return $status;
1579                 }
1580
1581                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1582                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1583                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1584                         ( $bot ? EDIT_FORCE_BOT : 0 );
1585
1586                         $doEditStatus = $this->mArticle->doEditContent( $content, $this->summary, $flags,
1587                                                                                                                         false, null, $this->content_format );
1588
1589                 if ( $doEditStatus->isOK() ) {
1590                                 $result['redirect'] = $content->isRedirect();
1591                         $this->commitWatch();
1592                         wfProfileOut( __METHOD__ );
1593                         return $status;
1594                 } else {
1595                         // Failure from doEdit()
1596                         // Show the edit conflict page for certain recognized errors from doEdit(),
1597                         // but don't show it for errors from extension hooks
1598                         $errors = $doEditStatus->getErrorsArray();
1599                         if ( in_array( $errors[0][0], array( 'edit-gone-missing', 'edit-conflict',
1600                                 'edit-already-exists' ) ) )
1601                         {
1602                                 $this->isConflict = true;
1603                                 // Destroys data doEdit() put in $status->value but who cares
1604                                 $doEditStatus->value = self::AS_END;
1605                         }
1606                         wfProfileOut( __METHOD__ );
1607                         return $doEditStatus;
1608                 }
1609         }
1610
1611         /**
1612          * Commit the change of watch status
1613          */
1614         protected function commitWatch() {
1615                 global $wgUser;
1616                 if ( $wgUser->isLoggedIn() && $this->watchthis != $wgUser->isWatched( $this->mTitle ) ) {
1617                         $dbw = wfGetDB( DB_MASTER );
1618                         $dbw->begin( __METHOD__ );
1619                         if ( $this->watchthis ) {
1620                                 WatchAction::doWatch( $this->mTitle, $wgUser );
1621                         } else {
1622                                 WatchAction::doUnwatch( $this->mTitle, $wgUser );
1623                         }
1624                         $dbw->commit( __METHOD__ );
1625                 }
1626         }
1627
1628         /**
1629          * Check if no edits were made by other users since
1630          * the time a user started editing the page. Limit to
1631          * 50 revisions for the sake of performance.
1632          *
1633          * @param $id int
1634          * @param $edittime string
1635          *
1636          * @return bool
1637          */
1638         protected function userWasLastToEdit( $id, $edittime ) {
1639                 if ( !$id ) return false;
1640                 $dbw = wfGetDB( DB_MASTER );
1641                 $res = $dbw->select( 'revision',
1642                         'rev_user',
1643                         array(
1644                                 'rev_page' => $this->mTitle->getArticleID(),
1645                                 'rev_timestamp > ' . $dbw->addQuotes( $dbw->timestamp( $edittime ) )
1646                         ),
1647                         __METHOD__,
1648                         array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
1649                 foreach ( $res as $row ) {
1650                         if ( $row->rev_user != $id ) {
1651                                 return false;
1652                         }
1653                 }
1654                 return true;
1655         }
1656
1657         /**
1658          * @private
1659          * @todo document
1660          *
1661          * @param $editText string
1662          *
1663          * @return bool
1664          * @deprecated since 1.WD, use mergeChangesIntoContent() instead
1665          */
1666         function mergeChangesInto( &$editText ){
1667                 wfDebug( __METHOD__, "1.WD" );
1668
1669                 $editContent = $this->toEditContent( $editText );
1670
1671                 $ok = $this->mergeChangesIntoContent( $editContent );
1672
1673                 if ( $ok ) {
1674                         $editText = $this->toEditText( $editContent );
1675                         return true;
1676                 } else {
1677                         return false;
1678                 }
1679         }
1680
1681         /**
1682          * @private
1683          * @todo document
1684          *
1685          * @parma $editText string
1686          *
1687          * @return bool
1688          * @since since 1.WD
1689          */
1690         private function mergeChangesIntoContent( &$editContent ){
1691                 wfProfileIn( __METHOD__ );
1692
1693                 $db = wfGetDB( DB_MASTER );
1694
1695                 // This is the revision the editor started from
1696                 $baseRevision = $this->getBaseRevision();
1697                 if ( is_null( $baseRevision ) ) {
1698                         wfProfileOut( __METHOD__ );
1699                         return false;
1700                 }
1701                 $baseContent = $baseRevision->getContent();
1702
1703                 // The current state, we want to merge updates into it
1704                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1705                 if ( is_null( $currentRevision ) ) {
1706                         wfProfileOut( __METHOD__ );
1707                         return false;
1708                 }
1709                 $currentContent = $currentRevision->getContent();
1710
1711                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
1712
1713                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
1714
1715                 if ( $result ) {
1716                         $editContent = $result;
1717                         wfProfileOut( __METHOD__ );
1718                         return true;
1719                 } else {
1720                         wfProfileOut( __METHOD__ );
1721                         return false;
1722                 }
1723         }
1724
1725         /**
1726          * @return Revision
1727          */
1728         function getBaseRevision() {
1729                 if ( !$this->mBaseRevision ) {
1730                         $db = wfGetDB( DB_MASTER );
1731                         $baseRevision = Revision::loadFromTimestamp(
1732                                 $db, $this->mTitle, $this->edittime );
1733                         return $this->mBaseRevision = $baseRevision;
1734                 } else {
1735                         return $this->mBaseRevision;
1736                 }
1737         }
1738
1739         /**
1740          * Check given input text against $wgSpamRegex, and return the text of the first match.
1741          *
1742          * @param $text string
1743          *
1744          * @return string|bool matching string or false
1745          */
1746         public static function matchSpamRegex( $text ) {
1747                 global $wgSpamRegex;
1748                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1749                 $regexes = (array)$wgSpamRegex;
1750                 return self::matchSpamRegexInternal( $text, $regexes );
1751         }
1752
1753         /**
1754          * Check given input text against $wgSpamRegex, and return the text of the first match.
1755          *
1756          * @param $text string
1757          *
1758          * @return string|bool  matching string or false
1759          */
1760         public static function matchSummarySpamRegex( $text ) {
1761                 global $wgSummarySpamRegex;
1762                 $regexes = (array)$wgSummarySpamRegex;
1763                 return self::matchSpamRegexInternal( $text, $regexes );
1764         }
1765
1766         /**
1767          * @param $text string
1768          * @param $regexes array
1769          * @return bool|string
1770          */
1771         protected static function matchSpamRegexInternal( $text, $regexes ) {
1772                 foreach ( $regexes as $regex ) {
1773                         $matches = array();
1774                         if ( preg_match( $regex, $text, $matches ) ) {
1775                                 return $matches[0];
1776                         }
1777                 }
1778                 return false;
1779         }
1780
1781         function setHeaders() {
1782                 global $wgOut, $wgUser;
1783
1784                 $wgOut->addModules( 'mediawiki.action.edit' );
1785
1786                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
1787                         $wgOut->addModules( 'mediawiki.legacy.preview' );
1788                 }
1789                 // Bug #19334: textarea jumps when editing articles in IE8
1790                 $wgOut->addStyle( 'common/IE80Fixes.css', 'screen', 'IE 8' );
1791
1792                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1793
1794                 # Enabled article-related sidebar, toplinks, etc.
1795                 $wgOut->setArticleRelated( true );
1796
1797                 $contextTitle = $this->getContextTitle();
1798                 if ( $this->isConflict ) {
1799                         $msg = 'editconflict';
1800                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
1801                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1802                 } else {
1803                         $msg = $contextTitle->exists() || ( $contextTitle->getNamespace() == NS_MEDIAWIKI && $contextTitle->getDefaultMessageText() !== false ) ?
1804                                 'editing' : 'creating';
1805                 }
1806                 # Use the title defined by DISPLAYTITLE magic word when present
1807                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
1808                 if ( $displayTitle === false ) {
1809                         $displayTitle = $contextTitle->getPrefixedText();
1810                 }
1811                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
1812         }
1813
1814         /**
1815          * Show all applicable editing introductions
1816          */
1817         protected function showIntro() {
1818                 global $wgOut, $wgUser;
1819                 if ( $this->suppressIntro ) {
1820                         return;
1821                 }
1822
1823                 $namespace = $this->mTitle->getNamespace();
1824
1825                 if ( $namespace == NS_MEDIAWIKI ) {
1826                         # Show a warning if editing an interface message
1827                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
1828                 } else if( $namespace == NS_FILE ) {
1829                         # Show a hint to shared repo
1830                         $file = wfFindFile( $this->mTitle );
1831                         if( $file && !$file->isLocal() ) {
1832                                 $descUrl = $file->getDescriptionUrl();
1833                                 # there must be a description url to show a hint to shared repo
1834                                 if( $descUrl ) {
1835                                         if( !$this->mTitle->exists() ) {
1836                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array (
1837                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
1838                                                 ) );
1839                                         } else {
1840                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
1841                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
1842                                                 ) );
1843                                         }
1844                                 }
1845                         }
1846                 }
1847
1848                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
1849                 # Show log extract when the user is currently blocked
1850                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
1851                         $parts = explode( '/', $this->mTitle->getText(), 2 );
1852                         $username = $parts[0];
1853                         $user = User::newFromName( $username, false /* allow IP users*/ );
1854                         $ip = User::isIP( $username );
1855                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
1856                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
1857                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
1858                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
1859                                 LogEventsList::showLogExtract(
1860                                         $wgOut,
1861                                         'block',
1862                                         $user->getUserPage(),
1863                                         '',
1864                                         array(
1865                                                 'lim' => 1,
1866                                                 'showIfEmpty' => false,
1867                                                 'msgKey' => array(
1868                                                         'blocked-notice-logextract',
1869                                                         $user->getName() # Support GENDER in notice
1870                                                 )
1871                                         )
1872                                 );
1873                         }
1874                 }
1875                 # Try to add a custom edit intro, or use the standard one if this is not possible.
1876                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
1877                         if ( $wgUser->isLoggedIn() ) {
1878                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
1879                         } else {
1880                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
1881                         }
1882                 }
1883                 # Give a notice if the user is editing a deleted/moved page...
1884                 if ( !$this->mTitle->exists() ) {
1885                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
1886                                 '', array( 'lim' => 10,
1887                                            'conds' => array( "log_action != 'revision'" ),
1888                                            'showIfEmpty' => false,
1889                                            'msgKey' => array( 'recreate-moveddeleted-warn' ) )
1890                         );
1891                 }
1892         }
1893
1894         /**
1895          * Attempt to show a custom editing introduction, if supplied
1896          *
1897          * @return bool
1898          */
1899         protected function showCustomIntro() {
1900                 if ( $this->editintro ) {
1901                         $title = Title::newFromText( $this->editintro );
1902                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
1903                                 global $wgOut;
1904                                 // Added using template syntax, to take <noinclude>'s into account.
1905                                 $wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
1906                                 return true;
1907                         } else {
1908                                 return false;
1909                         }
1910                 } else {
1911                         return false;
1912                 }
1913         }
1914
1915         /**
1916          * Gets an editable textual representation of the given Content object.
1917          * The textual representation can be turned by into a Content object by the
1918          * toEditContent() method.
1919          *
1920          * If the given Content object is not of a type that can be edited using the text base EditPage,
1921          * an exception will be raised. Set $this->allowNonTextContent to true to allow editing of non-textual
1922          * content.
1923          *
1924          * @param Content $content
1925          * @return String the editable text form of the content.
1926          *
1927          * @throws MWException if $content is not an instance of TextContent and $this->allowNonTextContent is not true.
1928          */
1929         protected function toEditText( Content $content ) {
1930                 if ( !$this->allowNonTextContent && !( $content instanceof TextContent ) ) {
1931                         throw new MWException( "This content model can not be edited as text: "
1932                                                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
1933                 }
1934
1935                 return $content->serialize( $this->content_format );
1936         }
1937
1938         /**
1939          * Turns the given text into a Content object by unserializing it.
1940          *
1941          * If the resulting Content object is not of a type that can be edited using the text base EditPage,
1942          * an exception will be raised. Set $this->allowNonTextContent to true to allow editing of non-textual
1943          * content.
1944          *
1945          * @param String $text Text to unserialize
1946          * @return Content the content object created from $text
1947          *
1948          * @throws MWException if unserializing the text results in a Content object that is not an instance of TextContent
1949          *          and $this->allowNonTextContent is not true.
1950          */
1951         protected function toEditContent( $text ) {
1952                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
1953                         $this->content_model, $this->content_format );
1954
1955                 if ( !$this->allowNonTextContent && !( $content instanceof TextContent ) ) {
1956                         throw new MWException( "This content model can not be edited as text: "
1957                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
1958                 }
1959
1960                 return $content;
1961         }
1962
1963         /**
1964          * Send the edit form and related headers to $wgOut
1965          * @param $formCallback Callback that takes an OutputPage parameter; will be called
1966          *     during form output near the top, for captchas and the like.
1967          */
1968         function showEditForm( $formCallback = null ) {
1969                 global $wgOut, $wgUser;
1970
1971                 wfProfileIn( __METHOD__ );
1972
1973                 # need to parse the preview early so that we know which templates are used,
1974                 # otherwise users with "show preview after edit box" will get a blank list
1975                 # we parse this near the beginning so that setHeaders can do the title
1976                 # setting work instead of leaving it in getPreviewText
1977                 $previewOutput = '';
1978                 if ( $this->formtype == 'preview' ) {
1979                         $previewOutput = $this->getPreviewText();
1980                 }
1981
1982                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
1983
1984                 $this->setHeaders();
1985
1986                 if ( $this->showHeader() === false ) {
1987                         wfProfileOut( __METHOD__ );
1988                         return;
1989                 }
1990
1991                 $wgOut->addHTML( $this->editFormPageTop );
1992
1993                 if ( $wgUser->getOption( 'previewontop' ) ) {
1994                         $this->displayPreviewArea( $previewOutput, true );
1995                 }
1996
1997                 $wgOut->addHTML( $this->editFormTextTop );
1998
1999                 $showToolbar = true;
2000                 if ( $this->wasDeletedSinceLastEdit() ) {
2001                         if ( $this->formtype == 'save' ) {
2002                                 // Hide the toolbar and edit area, user can click preview to get it back
2003                                 // Add an confirmation checkbox and explanation.
2004                                 $showToolbar = false;
2005                         } else {
2006                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2007                                         'deletedwhileediting' );
2008                         }
2009                 }
2010
2011                 //@todo: add EditForm plugin interface and use it here!
2012                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2013                 $wgOut->addHTML( Html::openElement( 'form', array( 'id' => self::EDITFORM_ID, 'name' => self::EDITFORM_ID,
2014                         'method' => 'post', 'action' => $this->getActionURL( $this->getContextTitle() ),
2015                         'enctype' => 'multipart/form-data' ) ) );
2016
2017                 if ( is_callable( $formCallback ) ) {
2018                         call_user_func_array( $formCallback, array( &$wgOut ) );
2019                 }
2020
2021                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
2022
2023                 // Put these up at the top to ensure they aren't lost on early form submission
2024                 $this->showFormBeforeText();
2025
2026                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2027                         $username = $this->lastDelete->user_name;
2028                         $comment = $this->lastDelete->log_comment;
2029
2030                         // It is better to not parse the comment at all than to have templates expanded in the middle
2031                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2032                         $key = $comment === ''
2033                                 ? 'confirmrecreate-noreason'
2034                                 : 'confirmrecreate';
2035                         $wgOut->addHTML(
2036                                 '<div class="mw-confirm-recreate">' .
2037                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2038                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2039                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2040                                 ) .
2041                                 '</div>'
2042                         );
2043                 }
2044
2045                 # When the summary is hidden, also hide them on preview/show changes
2046                 if( $this->nosummary ) {
2047                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2048                 }
2049
2050                 # If a blank edit summary was previously provided, and the appropriate
2051                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2052                 # user being bounced back more than once in the event that a summary
2053                 # is not required.
2054                 #####
2055                 # For a bit more sophisticated detection of blank summaries, hash the
2056                 # automatic one and pass that in the hidden field wpAutoSummary.
2057                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2058                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2059                 }
2060
2061                 if ( $this->undidRev ) {
2062                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2063                 }
2064
2065                 if ( $this->hasPresetSummary ) {
2066                         // If a summary has been preset using &summary= we dont want to prompt for
2067                         // a different summary. Only prompt for a summary if the summary is blanked.
2068                         // (Bug 17416)
2069                         $this->autoSumm = md5( '' );
2070                 }
2071
2072                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2073                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2074
2075                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2076
2077                 $wgOut->addHTML( Html::hidden( 'format', $this->content_format ) );
2078                 $wgOut->addHTML( Html::hidden( 'model', $this->content_model ) );
2079
2080                 if ( $this->section == 'new' ) {
2081                         $this->showSummaryInput( true, $this->summary );
2082                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2083                 }
2084
2085                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2086
2087                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2088                         $wgOut->addHTML( EditPage::getEditToolbar() );
2089                 }
2090
2091                 if ( $this->isConflict ) {
2092                         // In an edit conflict bypass the overrideable content form method
2093                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2094                         // resolved between page source edits and custom ui edits using the
2095                         // custom edit ui.
2096                         $this->textbox2 = $this->textbox1;
2097
2098                         $content = $this->getCurrentContent();
2099                         $this->textbox1 = $this->toEditText( $content );
2100
2101                         $this->showTextbox1();
2102                 } else {
2103                         $this->showContentForm();
2104                 }
2105
2106                 $wgOut->addHTML( $this->editFormTextAfterContent );
2107
2108                 $this->showStandardInputs();
2109
2110                 $this->showFormAfterText();
2111
2112                 $this->showTosSummary();
2113
2114                 $this->showEditTools();
2115
2116                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2117
2118                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2119                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2120
2121                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2122                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2123
2124                 if ( $this->isConflict ) {
2125                         try {
2126                                 $this->showConflict();
2127                         } catch ( MWContentSerializationException $ex ) {
2128                                 // this can't really happen, but be nice if it does.
2129                                 $msg = wfMessage( 'content-failed-to-parse', $this->content_model, $this->content_format, $ex->getMessage() );
2130                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>');
2131                         }
2132                 }
2133
2134                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2135
2136                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2137                         $this->displayPreviewArea( $previewOutput, false );
2138                 }
2139
2140                 wfProfileOut( __METHOD__ );
2141         }
2142
2143         /**
2144          * Extract the section title from current section text, if any.
2145          *
2146          * @param string $text
2147          * @return Mixed|string or false
2148          */
2149         public static function extractSectionTitle( $text ) {
2150                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2151                 if ( !empty( $matches[2] ) ) {
2152                         global $wgParser;
2153                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2154                 } else {
2155                         return false;
2156                 }
2157         }
2158
2159         protected function showHeader() {
2160                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2161
2162                 if ( $this->mTitle->isTalkPage() ) {
2163                         $wgOut->addWikiMsg( 'talkpagetext' );
2164                 }
2165
2166                 # Optional notices on a per-namespace and per-page basis
2167                 $editnotice_ns = 'editnotice-' . $this->mTitle->getNamespace();
2168                 $editnotice_ns_message = wfMessage( $editnotice_ns );
2169                 if ( $editnotice_ns_message->exists() ) {
2170                         $wgOut->addWikiText( $editnotice_ns_message->plain() );
2171                 }
2172                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
2173                         $parts = explode( '/', $this->mTitle->getDBkey() );
2174                         $editnotice_base = $editnotice_ns;
2175                         while ( count( $parts ) > 0 ) {
2176                                 $editnotice_base .= '-' . array_shift( $parts );
2177                                 $editnotice_base_msg = wfMessage( $editnotice_base );
2178                                 if ( $editnotice_base_msg->exists() ) {
2179                                         $wgOut->addWikiText( $editnotice_base_msg->plain() );
2180                                 }
2181                         }
2182                 } else {
2183                         # Even if there are no subpages in namespace, we still don't want / in MW ns.
2184                         $editnoticeText = $editnotice_ns . '-' . str_replace( '/', '-', $this->mTitle->getDBkey() );
2185                         $editnoticeMsg = wfMessage( $editnoticeText );
2186                         if ( $editnoticeMsg->exists() ) {
2187                                 $wgOut->addWikiText( $editnoticeMsg->plain() );
2188                         }
2189                 }
2190
2191                 if ( $this->isConflict ) {
2192                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2193                         $this->edittime = $this->mArticle->getTimestamp();
2194                 } else {
2195                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2196                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2197                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2198                                 // Someone is welcome to try refactoring though
2199                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2200                                 return false;
2201                         }
2202
2203                         if ( $this->section != '' && $this->section != 'new' ) {
2204                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2205                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); //FIXME: use Content object
2206                                         if ( $sectionTitle !== false ) {
2207                                                 $this->summary = "/* $sectionTitle */ ";
2208                                         }
2209                                 }
2210                         }
2211
2212                         if ( $this->missingComment ) {
2213                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2214                         }
2215
2216                         if ( $this->missingSummary && $this->section != 'new' ) {
2217                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2218                         }
2219
2220                         if ( $this->missingSummary && $this->section == 'new' ) {
2221                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2222                         }
2223
2224                         if ( $this->hookError !== '' ) {
2225                                 $wgOut->addWikiText( $this->hookError );
2226                         }
2227
2228                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2229                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2230                         }
2231
2232                         if ( $this->section != 'new' ) {
2233                                 $revision = $this->mArticle->getRevisionFetched();
2234                                 if ( $revision ) {
2235                                         // Let sysop know that this will make private content public if saved
2236
2237                                         if ( !$revision->userCan( Revision::DELETED_TEXT ) ) {
2238                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
2239                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2240                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
2241                                         }
2242
2243                                         if ( !$revision->isCurrent() ) {
2244                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2245                                                 $wgOut->addWikiMsg( 'editingold' );
2246                                         }
2247                                 } elseif ( $this->mTitle->exists() ) {
2248                                         // Something went wrong
2249
2250                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2251                                                 array( 'missing-revision', $this->oldid ) );
2252                                 }
2253                         }
2254                 }
2255
2256                 if ( wfReadOnly() ) {
2257                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
2258                 } elseif ( $wgUser->isAnon() ) {
2259                         if ( $this->formtype != 'preview' ) {
2260                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
2261                         } else {
2262                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
2263                         }
2264                 } else {
2265                         if ( $this->isCssJsSubpage ) {
2266                                 # Check the skin exists
2267                                 if ( $this->isWrongCaseCssJsPage ) {
2268                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
2269                                 }
2270                                 if ( $this->formtype !== 'preview' ) {
2271                                         if ( $this->isCssSubpage )
2272                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
2273                                         if ( $this->isJsSubpage )
2274                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
2275                                 }
2276                         }
2277                 }
2278
2279                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2280                         # Is the title semi-protected?
2281                         if ( $this->mTitle->isSemiProtected() ) {
2282                                 $noticeMsg = 'semiprotectedpagewarning';
2283                         } else {
2284                                 # Then it must be protected based on static groups (regular)
2285                                 $noticeMsg = 'protectedpagewarning';
2286                         }
2287                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2288                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2289                 }
2290                 if ( $this->mTitle->isCascadeProtected() ) {
2291                         # Is this page under cascading protection from some source pages?
2292                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2293                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2294                         $cascadeSourcesCount = count( $cascadeSources );
2295                         if ( $cascadeSourcesCount > 0 ) {
2296                                 # Explain, and list the titles responsible
2297                                 foreach ( $cascadeSources as $page ) {
2298                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2299                                 }
2300                         }
2301                         $notice .= '</div>';
2302                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2303                 }
2304                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2305                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2306                                 array( 'lim' => 1,
2307                                         'showIfEmpty' => false,
2308                                         'msgKey' => array( 'titleprotectedwarning' ),
2309                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2310                 }
2311
2312                 if ( $this->kblength === false ) {
2313                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2314                 }
2315
2316                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2317                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2318                                 array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
2319                 } else {
2320                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2321                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2322                                         array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
2323                                 );
2324                         }
2325                 }
2326                 # Add header copyright warning
2327                 $this->showHeaderCopyrightWarning();
2328         }
2329
2330
2331         /**
2332          * Standard summary input and label (wgSummary), abstracted so EditPage
2333          * subclasses may reorganize the form.
2334          * Note that you do not need to worry about the label's for=, it will be
2335          * inferred by the id given to the input. You can remove them both by
2336          * passing array( 'id' => false ) to $userInputAttrs.
2337          *
2338          * @param $summary string The value of the summary input
2339          * @param $labelText string The html to place inside the label
2340          * @param $inputAttrs array of attrs to use on the input
2341          * @param $spanLabelAttrs array of attrs to use on the span inside the label
2342          *
2343          * @return array An array in the format array( $label, $input )
2344          */
2345         function getSummaryInput( $summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null ) {
2346                 // Note: the maxlength is overriden in JS to 255 and to make it use UTF-8 bytes, not characters.
2347                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2348                         'id' => 'wpSummary',
2349                         'maxlength' => '200',
2350                         'tabindex' => '1',
2351                         'size' => 60,
2352                         'spellcheck' => 'true',
2353                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2354
2355                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2356                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2357                         'id' => "wpSummaryLabel"
2358                 );
2359
2360                 $label = null;
2361                 if ( $labelText ) {
2362                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
2363                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2364                 }
2365
2366                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2367
2368                 return array( $label, $input );
2369         }
2370
2371         /**
2372          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2373          *                          up top, or false if this is the comment summary
2374          *                          down below the textarea
2375          * @param $summary String: The text of the summary to display
2376          * @return String
2377          */
2378         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2379                 global $wgOut, $wgContLang;
2380                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2381                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2382                 if ( $isSubjectPreview ) {
2383                         if ( $this->nosummary ) {
2384                                 return;
2385                         }
2386                 } else {
2387                         if ( !$this->mShowSummaryField ) {
2388                                 return;
2389                         }
2390                 }
2391                 $summary = $wgContLang->recodeForEdit( $summary );
2392                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2393                 list( $label, $input ) = $this->getSummaryInput( $summary, $labelText, array( 'class' => $summaryClass ), array() );
2394                 $wgOut->addHTML( "{$label} {$input}" );
2395         }
2396
2397         /**
2398          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2399          *                          up top, or false if this is the comment summary
2400          *                          down below the textarea
2401          * @param $summary String: the text of the summary to display
2402          * @return String
2403          */
2404         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2405                 if ( !$summary || ( !$this->preview && !$this->diff ) )
2406                         return "";
2407
2408                 global $wgParser;
2409
2410                 if ( $isSubjectPreview )
2411                         $summary = wfMessage( 'newsectionsummary', $wgParser->stripSectionName( $summary ) )
2412                                 ->inContentLanguage()->text();
2413
2414                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2415
2416                 $summary = wfMessage( $message )->parse() . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2417                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2418         }
2419
2420         protected function showFormBeforeText() {
2421                 global $wgOut;
2422                 $section = htmlspecialchars( $this->section );
2423                 $wgOut->addHTML( <<<HTML
2424 <input type='hidden' value="{$section}" name="wpSection" />
2425 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2426 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2427 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2428
2429 HTML
2430                 );
2431                 if ( !$this->checkUnicodeCompliantBrowser() )
2432                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2433         }
2434
2435         protected function showFormAfterText() {
2436                 global $wgOut, $wgUser;
2437                 /**
2438                  * To make it harder for someone to slip a user a page
2439                  * which submits an edit form to the wiki without their
2440                  * knowledge, a random token is associated with the login
2441                  * session. If it's not passed back with the submission,
2442                  * we won't save the page, or render user JavaScript and
2443                  * CSS previews.
2444                  *
2445                  * For anon editors, who may not have a session, we just
2446                  * include the constant suffix to prevent editing from
2447                  * broken text-mangling proxies.
2448                  */
2449                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2450         }
2451
2452         /**
2453          * Subpage overridable method for printing the form for page content editing
2454          * By default this simply outputs wpTextbox1
2455          * Subclasses can override this to provide a custom UI for editing;
2456          * be it a form, or simply wpTextbox1 with a modified content that will be
2457          * reverse modified when extracted from the post data.
2458          * Note that this is basically the inverse for importContentFormData
2459          */
2460         protected function showContentForm() {
2461                 $this->showTextbox1();
2462         }
2463
2464         /**
2465          * Method to output wpTextbox1
2466          * The $textoverride method can be used by subclasses overriding showContentForm
2467          * to pass back to this method.
2468          *
2469          * @param $customAttribs array of html attributes to use in the textarea
2470          * @param $textoverride String: optional text to override $this->textarea1 with
2471          */
2472         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2473                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2474                         $attribs = array( 'style' => 'display:none;' );
2475                 } else {
2476                         $classes = array(); // Textarea CSS
2477                         if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2478                                 # Is the title semi-protected?
2479                                 if ( $this->mTitle->isSemiProtected() ) {
2480                                         $classes[] = 'mw-textarea-sprotected';
2481                                 } else {
2482                                         # Then it must be protected based on static groups (regular)
2483                                         $classes[] = 'mw-textarea-protected';
2484                                 }
2485                                 # Is the title cascade-protected?
2486                                 if ( $this->mTitle->isCascadeProtected() ) {
2487                                         $classes[] = 'mw-textarea-cprotected';
2488                                 }
2489                         }
2490
2491                         $attribs = array( 'tabindex' => 1 );
2492
2493                         if ( is_array( $customAttribs ) ) {
2494                                 $attribs += $customAttribs;
2495                         }
2496
2497                         if ( count( $classes ) ) {
2498                                 if ( isset( $attribs['class'] ) ) {
2499                                         $classes[] = $attribs['class'];
2500                                 }
2501                                 $attribs['class'] = implode( ' ', $classes );
2502                         }
2503                 }
2504
2505                 $this->showTextbox( $textoverride !== null ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
2506         }
2507
2508         protected function showTextbox2() {
2509                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2510         }
2511
2512         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2513                 global $wgOut, $wgUser;
2514
2515                 $wikitext = $this->safeUnicodeOutput( $text );
2516                 if ( strval( $wikitext ) !== '' ) {
2517                         // Ensure there's a newline at the end, otherwise adding lines
2518                         // is awkward.
2519                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2520                         // mode will show an extra newline. A bit annoying.
2521                         $wikitext .= "\n";
2522                 }
2523
2524                 $attribs = $customAttribs + array(
2525                         'accesskey' => ',',
2526                         'id'   => $name,
2527                         'cols' => $wgUser->getIntOption( 'cols' ),
2528                         'rows' => $wgUser->getIntOption( 'rows' ),
2529                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
2530                 );
2531
2532                 $pageLang = $this->mTitle->getPageLanguage();
2533                 $attribs['lang'] = $pageLang->getCode();
2534                 $attribs['dir'] = $pageLang->getDir();
2535
2536                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2537         }
2538
2539         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2540                 global $wgOut;
2541                 $classes = array();
2542                 if ( $isOnTop )
2543                         $classes[] = 'ontop';
2544
2545                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2546
2547                 if ( $this->formtype != 'preview' )
2548                         $attribs['style'] = 'display: none;';
2549
2550                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2551
2552                 if ( $this->formtype == 'preview' ) {
2553                         $this->showPreview( $previewOutput );
2554                 }
2555
2556                 $wgOut->addHTML( '</div>' );
2557
2558                 if ( $this->formtype == 'diff' ) {
2559                         try {
2560                                 $this->showDiff();
2561                         } catch ( MWContentSerializationException $ex ) {
2562                                 $msg = wfMessage( 'content-failed-to-parse', $this->content_model, $this->content_format, $ex->getMessage() );
2563                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>');
2564                         }
2565                 }
2566         }
2567
2568         /**
2569          * Append preview output to $wgOut.
2570          * Includes category rendering if this is a category page.
2571          *
2572          * @param $text String: the HTML to be output for the preview.
2573          */
2574         protected function showPreview( $text ) {
2575                 global $wgOut;
2576                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2577                         $this->mArticle->openShowCategory();
2578                 }
2579                 # This hook seems slightly odd here, but makes things more
2580                 # consistent for extensions.
2581                 wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
2582                 $wgOut->addHTML( $text );
2583                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2584                         $this->mArticle->closeShowCategory();
2585                 }
2586         }
2587
2588         /**
2589          * Get a diff between the current contents of the edit box and the
2590          * version of the page we're editing from.
2591          *
2592          * If this is a section edit, we'll replace the section as for final
2593          * save and then make a comparison.
2594          */
2595         function showDiff() {
2596                 global $wgUser, $wgContLang, $wgParser, $wgOut;
2597
2598                 $oldtitlemsg = 'currentrev';
2599                 # if message does not exist, show diff against the preloaded default
2600                 if( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
2601                         $oldtext = $this->mTitle->getDefaultMessageText();
2602                         if( $oldtext !== false ) {
2603                                 $oldtitlemsg = 'defaultmessagetext';
2604                                 $oldContent = $this->toEditContent( $oldtext );
2605                         } else {
2606                                 $oldContent = null;
2607                         }
2608                 } else {
2609                         $oldContent = $this->getOriginalContent();
2610                 }
2611
2612                 $textboxContent = $this->toEditContent( $this->textbox1 );
2613
2614                 $newContent = $this->mArticle->replaceSectionContent(
2615                                                                                         $this->section, $textboxContent,
2616                                                                                         $this->summary, $this->edittime );
2617
2618                 ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
2619                 wfRunHooks( 'EditPageGetDiffContent', array( $this, &$newContent ) );
2620
2621                 $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
2622                 $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
2623
2624                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
2625                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
2626                         $newtitle = wfMessage( 'yourtext' )->parse();
2627
2628                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
2629                         $de->setContent( $oldContent, $newContent );
2630
2631                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2632                         $de->showDiffStyle();
2633                 } else {
2634                         $difftext = '';
2635                 }
2636
2637                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2638         }
2639
2640         /**
2641          * Show the header copyright warning.
2642          */
2643         protected function showHeaderCopyrightWarning() {
2644                 $msg = 'editpage-head-copy-warn';
2645                 if ( !wfMessage( $msg )->isDisabled() ) {
2646                         global $wgOut;
2647                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
2648                                 'editpage-head-copy-warn' );
2649                 }
2650         }
2651
2652         /**
2653          * Give a chance for site and per-namespace customizations of
2654          * terms of service summary link that might exist separately
2655          * from the copyright notice.
2656          *
2657          * This will display between the save button and the edit tools,
2658          * so should remain short!
2659          */
2660         protected function showTosSummary() {
2661                 $msg = 'editpage-tos-summary';
2662                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
2663                 if ( !wfMessage( $msg )->isDisabled() ) {
2664                         global $wgOut;
2665                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
2666                         $wgOut->addWikiMsg( $msg );
2667                         $wgOut->addHTML( '</div>' );
2668                 }
2669         }
2670
2671         protected function showEditTools() {
2672                 global $wgOut;
2673                 $wgOut->addHTML( '<div class="mw-editTools">' .
2674                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
2675                         '</div>' );
2676         }
2677
2678         /**
2679          * Get the copyright warning
2680          *
2681          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
2682          */
2683         protected function getCopywarn() {
2684                 return self::getCopyrightWarning( $this->mTitle );
2685         }
2686
2687         public static function getCopyrightWarning( $title ) {
2688                 global $wgRightsText;
2689                 if ( $wgRightsText ) {
2690                         $copywarnMsg = array( 'copyrightwarning',
2691                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
2692                                 $wgRightsText );
2693                 } else {
2694                         $copywarnMsg = array( 'copyrightwarning2',
2695                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
2696                 }
2697                 // Allow for site and per-namespace customization of contribution/copyright notice.
2698                 wfRunHooks( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
2699
2700                 return "<div id=\"editpage-copywarn\">\n" .
2701                         call_user_func_array( 'wfMessage', $copywarnMsg )->plain() . "\n</div>";
2702         }
2703
2704         protected function showStandardInputs( &$tabindex = 2 ) {
2705                 global $wgOut;
2706                 $wgOut->addHTML( "<div class='editOptions'>\n" );
2707
2708                 if ( $this->section != 'new' ) {
2709                         $this->showSummaryInput( false, $this->summary );
2710                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
2711                 }
2712
2713                 $checkboxes = $this->getCheckboxes( $tabindex,
2714                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
2715                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
2716
2717                 // Show copyright warning.
2718                 $wgOut->addWikiText( $this->getCopywarn() );
2719                 $wgOut->addHTML( $this->editFormTextAfterWarn );
2720
2721                 $wgOut->addHTML( "<div class='editButtons'>\n" );
2722                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
2723
2724                 $cancel = $this->getCancelLink();
2725                 if ( $cancel !== '' ) {
2726                         $cancel .= wfMessage( 'pipe-separator' )->text();
2727                 }
2728                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMessage( 'edithelppage' )->inContentLanguage()->text() );
2729                 $edithelp = '<a target="helpwindow" href="' . $edithelpurl . '">' .
2730                         wfMessage( 'edithelp' )->escaped() . '</a> ' .
2731                         wfMessage( 'newwindow' )->parse();
2732                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
2733                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
2734                 $wgOut->addHTML( "</div><!-- editButtons -->\n</div><!-- editOptions -->\n" );
2735         }
2736
2737         /**
2738          * Show an edit conflict. textbox1 is already shown in showEditForm().
2739          * If you want to use another entry point to this function, be careful.
2740          */
2741         protected function showConflict() {
2742                 global $wgOut;
2743
2744                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
2745                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2746
2747                         $content1 = $this->toEditContent( $this->textbox1 );
2748                         $content2 = $this->toEditContent( $this->textbox2 );
2749
2750                         $handler = ContentHandler::getForModelID( $this->content_model );
2751                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
2752                         $de->setContent( $content2, $content1 );
2753                         $de->showDiff(
2754                                 wfMessage( 'yourtext' )->parse(),
2755                                 wfMessage( 'storedversion' )->text()
2756                         );
2757
2758                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2759                         $this->showTextbox2();
2760                 }
2761         }
2762
2763         /**
2764          * @return string
2765          */
2766         public function getCancelLink() {
2767                 $cancelParams = array();
2768                 if ( !$this->isConflict && $this->oldid > 0 ) {
2769                         $cancelParams['oldid'] = $this->oldid;
2770                 }
2771
2772                 return Linker::linkKnown(
2773                         $this->getContextTitle(),
2774                         wfMessage( 'cancel' )->parse(),
2775                         array( 'id' => 'mw-editform-cancel' ),
2776                         $cancelParams
2777                 );
2778         }
2779
2780         /**
2781          * Returns the URL to use in the form's action attribute.
2782          * This is used by EditPage subclasses when simply customizing the action
2783          * variable in the constructor is not enough. This can be used when the
2784          * EditPage lives inside of a Special page rather than a custom page action.
2785          *
2786          * @param $title Title object for which is being edited (where we go to for &action= links)
2787          * @return string
2788          */
2789         protected function getActionURL( Title $title ) {
2790                 return $title->getLocalURL( array( 'action' => $this->action ) );
2791         }
2792
2793         /**
2794          * Check if a page was deleted while the user was editing it, before submit.
2795          * Note that we rely on the logging table, which hasn't been always there,
2796          * but that doesn't matter, because this only applies to brand new
2797          * deletes.
2798          */
2799         protected function wasDeletedSinceLastEdit() {
2800                 if ( $this->deletedSinceEdit !== null ) {
2801                         return $this->deletedSinceEdit;
2802                 }
2803
2804                 $this->deletedSinceEdit = false;
2805
2806                 if ( $this->mTitle->isDeletedQuick() ) {
2807                         $this->lastDelete = $this->getLastDelete();
2808                         if ( $this->lastDelete ) {
2809                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
2810                                 if ( $deleteTime > $this->starttime ) {
2811                                         $this->deletedSinceEdit = true;
2812                                 }
2813                         }
2814                 }
2815
2816                 return $this->deletedSinceEdit;
2817         }
2818
2819         protected function getLastDelete() {
2820                 $dbr = wfGetDB( DB_SLAVE );
2821                 $data = $dbr->selectRow(
2822                         array( 'logging', 'user' ),
2823                         array( 'log_type',
2824                                    'log_action',
2825                                    'log_timestamp',
2826                                    'log_user',
2827                                    'log_namespace',
2828                                    'log_title',
2829                                    'log_comment',
2830                                    'log_params',
2831                                    'log_deleted',
2832                                    'user_name' ),
2833                         array( 'log_namespace' => $this->mTitle->getNamespace(),
2834                                    'log_title' => $this->mTitle->getDBkey(),
2835                                    'log_type' => 'delete',
2836                                    'log_action' => 'delete',
2837                                    'user_id=log_user' ),
2838                         __METHOD__,
2839                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
2840                 );
2841                 // Quick paranoid permission checks...
2842                 if ( is_object( $data ) ) {
2843                         if ( $data->log_deleted & LogPage::DELETED_USER )
2844                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
2845                         if ( $data->log_deleted & LogPage::DELETED_COMMENT )
2846                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
2847                 }
2848                 return $data;
2849         }
2850
2851         /**
2852          * Get the rendered text for previewing.
2853          * @return string
2854          */
2855         function getPreviewText() {
2856                 global $wgOut, $wgUser, $wgParser, $wgRawHtml, $wgLang;
2857
2858                 wfProfileIn( __METHOD__ );
2859
2860                 if ( $wgRawHtml && !$this->mTokenOk ) {
2861                         // Could be an offsite preview attempt. This is very unsafe if
2862                         // HTML is enabled, as it could be an attack.
2863                         $parsedNote = '';
2864                         if ( $this->textbox1 !== '' ) {
2865                                 // Do not put big scary notice, if previewing the empty
2866                                 // string, which happens when you initially edit
2867                                 // a category page, due to automatic preview-on-open.
2868                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
2869                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
2870                         }
2871                         wfProfileOut( __METHOD__ );
2872                         return $parsedNote;
2873                 }
2874
2875                 $note = '';
2876
2877                 try {
2878                         $content = $this->toEditContent( $this->textbox1 );
2879
2880                         if ( $this->mTriedSave && !$this->mTokenOk ) {
2881                                 if ( $this->mTokenOkExceptSuffix ) {
2882                                         $note = wfMessage( 'token_suffix_mismatch' )->plain() ;
2883                                 } else {
2884                                         $note = wfMessage( 'session_fail_preview' )->plain() ;
2885                                 }
2886                         } elseif ( $this->incompleteForm ) {
2887                                 $note = wfMessage( 'edit_form_incomplete' )->plain() ;
2888                         } else {
2889                                 $note = wfMessage( 'previewnote' )->plain() .
2890                                         ' [[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' . wfMessage( 'continue-editing' )->text() . ']]';
2891                         }
2892
2893                         $parserOptions = ParserOptions::newFromUser( $wgUser );
2894                         $parserOptions->setEditSection( false );
2895                         $parserOptions->setTidy( true );
2896                         $parserOptions->setIsPreview( true );
2897                         $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
2898
2899                         # don't parse non-wikitext pages, show message about preview
2900                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
2901                                 if( $this->mTitle->isCssJsSubpage() ) {
2902                                         $level = 'user';
2903                                 } elseif( $this->mTitle->isCssOrJsPage() ) {
2904                                         $level = 'site';
2905                                 } else {
2906                                         $level = false;
2907                                 }
2908
2909                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
2910                                         $format = 'css';
2911                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
2912                                         $format = 'js';
2913                                 } else {
2914                                         $format = false;
2915                                 }
2916
2917                                 # Used messages to make sure grep find them:
2918                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
2919                                 if( $level && $format ) {
2920                                         $note = "<div id='mw-{$level}{$format}preview'>" . wfMessage( "{$level}{$format}preview" )->text()  . "</div>";
2921                                 } else {
2922                                         $note = wfMessage( 'previewnote' )->text() ;
2923                                 }
2924                         } else {
2925                                 $note = wfMessage( 'previewnote' )->text() ;
2926                         }
2927
2928                         $rt = $content->getRedirectChain();
2929
2930                         if ( $rt ) {
2931                                 $previewHTML = $this->mArticle->viewRedirect( $rt, false );
2932                         } else {
2933
2934                                 # If we're adding a comment, we need to show the
2935                                 # summary as the headline
2936                                 if ( $this->section == "new" && $this->summary != "" ) {
2937                                         $content = $content->addSectionHeader( $this->summary );
2938                                 }
2939
2940                                 $hook_args = array( $this, &$content );
2941                                 ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
2942                                 wfRunHooks( 'EditPageGetPreviewContent', $hook_args );
2943
2944                                 $parserOptions->enableLimitReport();
2945
2946                                 # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
2947                                 # But it's now deprecated, so never mind
2948
2949                                 $content = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
2950                                 $parserOutput = $content->getParserOutput( $this->getArticle()->getTitle(), null, $parserOptions );
2951
2952                                 $previewHTML = $parserOutput->getText();
2953                                 $this->mParserOutput = $parserOutput;
2954                                 $wgOut->addParserOutputNoText( $parserOutput );
2955
2956                                 if ( count( $parserOutput->getWarnings() ) ) {
2957                                         $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
2958                                 }
2959                         }
2960                 } catch (MWContentSerializationException $ex) {
2961                         $m = wfMessage('content-failed-to-parse', $this->content_model, $this->content_format, $ex->getMessage() );
2962                         $note .= "\n\n" . $m->parse();
2963                         $previewHTML = '';
2964                 }
2965
2966                 if ( $this->isConflict ) {
2967                         $conflict = '<h2 id="mw-previewconflict">' . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
2968                 } else {
2969                         $conflict = '<hr />';
2970                 }
2971
2972                 $previewhead = "<div class='previewnote'>\n" .
2973                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
2974                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
2975
2976                 $pageLang = $this->mTitle->getPageLanguage();
2977                 $attribs = array( 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
2978                         'class' => 'mw-content-' . $pageLang->getDir() );
2979                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
2980
2981                 wfProfileOut( __METHOD__ );
2982                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
2983         }
2984
2985         /**
2986          * @return Array
2987          */
2988         function getTemplates() {
2989                 if ( $this->preview || $this->section != '' ) {
2990                         $templates = array();
2991                         if ( !isset( $this->mParserOutput ) ) {
2992                                 return $templates;
2993                         }
2994                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
2995                                 foreach ( array_keys( $template ) as $dbk ) {
2996                                         $templates[] = Title::makeTitle( $ns, $dbk );
2997                                 }
2998                         }
2999                         return $templates;
3000                 } else {
3001                         return $this->mTitle->getTemplateLinksFrom();
3002                 }
3003         }
3004
3005         /**
3006          * Shows a bulletin board style toolbar for common editing functions.
3007          * It can be disabled in the user preferences.
3008          * The necessary JavaScript code can be found in skins/common/edit.js.
3009          *
3010          * @return string
3011          */
3012         static function getEditToolbar() {
3013                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
3014                 global $wgUseTeX, $wgEnableUploads, $wgForeignFileRepos;
3015
3016                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3017
3018                 /**
3019                  * $toolarray is an array of arrays each of which includes the
3020                  * filename of the button image (without path), the opening
3021                  * tag, the closing tag, optionally a sample text that is
3022                  * inserted between the two when no selection is highlighted
3023                  * and.  The tip text is shown when the user moves the mouse
3024                  * over the button.
3025                  *
3026                  * Also here: accesskeys (key), which are not used yet until
3027                  * someone can figure out a way to make them work in
3028                  * IE. However, we should make sure these keys are not defined
3029                  * on the edit page.
3030                  */
3031                 $toolarray = array(
3032                         array(
3033                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
3034                                 'id'     => 'mw-editbutton-bold',
3035                                 'open'   => '\'\'\'',
3036                                 'close'  => '\'\'\'',
3037                                 'sample' => wfMessage( 'bold_sample' )->text(),
3038                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3039                                 'key'    => 'B'
3040                         ),
3041                         array(
3042                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
3043                                 'id'     => 'mw-editbutton-italic',
3044                                 'open'   => '\'\'',
3045                                 'close'  => '\'\'',
3046                                 'sample' => wfMessage( 'italic_sample' )->text(),
3047                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3048                                 'key'    => 'I'
3049                         ),
3050                         array(
3051                                 'image'  => $wgLang->getImageFile( 'button-link' ),
3052                                 'id'     => 'mw-editbutton-link',
3053                                 'open'   => '[[',
3054                                 'close'  => ']]',
3055                                 'sample' => wfMessage( 'link_sample' )->text(),
3056                                 'tip'    => wfMessage( 'link_tip' )->text(),
3057                                 'key'    => 'L'
3058                         ),
3059                         array(
3060                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
3061                                 'id'     => 'mw-editbutton-extlink',
3062                                 'open'   => '[',
3063                                 'close'  => ']',
3064                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3065                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3066                                 'key'    => 'X'
3067                         ),
3068                         array(
3069                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
3070                                 'id'     => 'mw-editbutton-headline',
3071                                 'open'   => "\n== ",
3072                                 'close'  => " ==\n",
3073                                 'sample' => wfMessage( 'headline_sample' )->text(),
3074                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3075                                 'key'    => 'H'
3076                         ),
3077                         $imagesAvailable ? array(
3078                                 'image'  => $wgLang->getImageFile( 'button-image' ),
3079                                 'id'     => 'mw-editbutton-image',
3080                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3081                                 'close'  => ']]',
3082                                 'sample' => wfMessage( 'image_sample' )->text(),
3083                                 'tip'    => wfMessage( 'image_tip' )->text(),
3084                                 'key'    => 'D',
3085                         ) : false,
3086                         $imagesAvailable ? array(
3087                                 'image'  => $wgLang->getImageFile( 'button-media' ),
3088                                 'id'     => 'mw-editbutton-media',
3089                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3090                                 'close'  => ']]',
3091                                 'sample' => wfMessage( 'media_sample' )->text(),
3092                                 'tip'    => wfMessage( 'media_tip' )->text(),
3093                                 'key'    => 'M'
3094                         ) : false,
3095                         $wgUseTeX ? array(
3096                                 'image'  => $wgLang->getImageFile( 'button-math' ),
3097                                 'id'     => 'mw-editbutton-math',
3098                                 'open'   => "<math>",
3099                                 'close'  => "</math>",
3100                                 'sample' => wfMessage( 'math_sample' )->text(),
3101                                 'tip'    => wfMessage( 'math_tip' )->text(),
3102                                 'key'    => 'C'
3103                         ) : false,
3104                         array(
3105                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
3106                                 'id'     => 'mw-editbutton-nowiki',
3107                                 'open'   => "<nowiki>",
3108                                 'close'  => "</nowiki>",
3109                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3110                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3111                                 'key'    => 'N'
3112                         ),
3113                         array(
3114                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
3115                                 'id'     => 'mw-editbutton-signature',
3116                                 'open'   => '--~~~~',
3117                                 'close'  => '',
3118                                 'sample' => '',
3119                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3120                                 'key'    => 'Y'
3121                         ),
3122                         array(
3123                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
3124                                 'id'     => 'mw-editbutton-hr',
3125                                 'open'   => "\n----\n",
3126                                 'close'  => '',
3127                                 'sample' => '',
3128                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3129                                 'key'    => 'R'
3130                         )
3131                 );
3132
3133                 $script = 'mw.loader.using("mediawiki.action.edit", function() {';
3134                 foreach ( $toolarray as $tool ) {
3135                         if ( !$tool ) {
3136                                 continue;
3137                         }
3138
3139                         $params = array(
3140                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
3141                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3142                                 // Older browsers show a "speedtip" type message only for ALT.
3143                                 // Ideally these should be different, realistically they
3144                                 // probably don't need to be.
3145                                 $tip = $tool['tip'],
3146                                 $open = $tool['open'],
3147                                 $close = $tool['close'],
3148                                 $sample = $tool['sample'],
3149                                 $cssId = $tool['id'],
3150                         );
3151
3152                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
3153                 }
3154
3155                 // This used to be called on DOMReady from mediawiki.action.edit, which
3156                 // ended up causing race conditions with the setup code above.
3157                 $script .= "\n" .
3158                         "// Create button bar\n" .
3159                         "$(function() { mw.toolbar.init(); } );\n";
3160
3161                 $script .= '});';
3162                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3163
3164                 $toolbar = '<div id="toolbar"></div>';
3165
3166                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3167
3168                 return $toolbar;
3169         }
3170
3171         /**
3172          * Returns an array of html code of the following checkboxes:
3173          * minor and watch
3174          *
3175          * @param $tabindex int Current tabindex
3176          * @param $checked Array of checkbox => bool, where bool indicates the checked
3177          *                 status of the checkbox
3178          *
3179          * @return array
3180          */
3181         public function getCheckboxes( &$tabindex, $checked ) {
3182                 global $wgUser;
3183
3184                 $checkboxes = array();
3185
3186                 // don't show the minor edit checkbox if it's a new page or section
3187                 if ( !$this->isNew ) {
3188                         $checkboxes['minor'] = '';
3189                         $minorLabel = wfMessage( 'minoredit' )->parse();
3190                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3191                                 $attribs = array(
3192                                         'tabindex'  => ++$tabindex,
3193                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3194                                         'id'        => 'wpMinoredit',
3195                                 );
3196                                 $checkboxes['minor'] =
3197                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3198                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3199                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3200                                         ">{$minorLabel}</label>";
3201                         }
3202                 }
3203
3204                 $watchLabel = wfMessage( 'watchthis' )->parse();
3205                 $checkboxes['watch'] = '';
3206                 if ( $wgUser->isLoggedIn() ) {
3207                         $attribs = array(
3208                                 'tabindex'  => ++$tabindex,
3209                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3210                                 'id'        => 'wpWatchthis',
3211                         );
3212                         $checkboxes['watch'] =
3213                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3214                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3215                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3216                                 ">{$watchLabel}</label>";
3217                 }
3218                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3219                 return $checkboxes;
3220         }
3221
3222         /**
3223          * Returns an array of html code of the following buttons:
3224          * save, diff, preview and live
3225          *
3226          * @param $tabindex int Current tabindex
3227          *
3228          * @return array
3229          */
3230         public function getEditButtons( &$tabindex ) {
3231                 $buttons = array();
3232
3233                 $temp = array(
3234                         'id'        => 'wpSave',
3235                         'name'      => 'wpSave',
3236                         'type'      => 'submit',
3237                         'tabindex'  => ++$tabindex,
3238                         'value'     => wfMessage( 'savearticle' )->text(),
3239                         'accesskey' => wfMessage( 'accesskey-save' )->text(),
3240                         'title'     => wfMessage( 'tooltip-save' )->text() . ' [' . wfMessage( 'accesskey-save' )->text() . ']',
3241                 );
3242                 $buttons['save'] = Xml::element( 'input', $temp, '' );
3243
3244                 ++$tabindex; // use the same for preview and live preview
3245                 $temp = array(
3246                         'id'        => 'wpPreview',
3247                         'name'      => 'wpPreview',
3248                         'type'      => 'submit',
3249                         'tabindex'  => $tabindex,
3250                         'value'     => wfMessage( 'showpreview' )->text(),
3251                         'accesskey' => wfMessage( 'accesskey-preview' )->text(),
3252                         'title'     => wfMessage( 'tooltip-preview' )->text() . ' [' . wfMessage( 'accesskey-preview' )->text() . ']',
3253                 );
3254                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
3255                 $buttons['live'] = '';
3256
3257                 $temp = array(
3258                         'id'        => 'wpDiff',
3259                         'name'      => 'wpDiff',
3260                         'type'      => 'submit',
3261                         'tabindex'  => ++$tabindex,
3262                         'value'     => wfMessage( 'showdiff' )->text(),
3263                         'accesskey' => wfMessage( 'accesskey-diff' )->text(),
3264                         'title'     => wfMessage( 'tooltip-diff' )->text() . ' [' . wfMessage( 'accesskey-diff' )->text() . ']',
3265                 );
3266                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
3267
3268                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3269                 return $buttons;
3270         }
3271
3272         /**
3273          * Output preview text only. This can be sucked into the edit page
3274          * via JavaScript, and saves the server time rendering the skin as
3275          * well as theoretically being more robust on the client (doesn't
3276          * disturb the edit box's undo history, won't eat your text on
3277          * failure, etc).
3278          *
3279          * @todo This doesn't include category or interlanguage links.
3280          *       Would need to enhance it a bit, "<s>maybe wrap them in XML
3281          *       or something...</s>" that might also require more skin
3282          *       initialization, so check whether that's a problem.
3283          */
3284         function livePreview() {
3285                 global $wgOut;
3286                 $wgOut->disable();
3287                 header( 'Content-type: text/xml; charset=utf-8' );
3288                 header( 'Cache-control: no-cache' );
3289
3290                 $previewText = $this->getPreviewText();
3291                 #$categories = $skin->getCategoryLinks();
3292
3293                 $s =
3294                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3295                 Xml::tags( 'livepreview', null,
3296                         Xml::element( 'preview', null, $previewText )
3297                         #.      Xml::element( 'category', null, $categories )
3298                 );
3299                 echo $s;
3300         }
3301
3302         /**
3303          * Call the stock "user is blocked" page
3304          *
3305          * @deprecated in 1.19; throw an exception directly instead
3306          */
3307         function blockedPage() {
3308                 wfDeprecated( __METHOD__, '1.19' );
3309                 global $wgUser;
3310
3311                 throw new UserBlockedError( $wgUser->getBlock() );
3312         }
3313
3314         /**
3315          * Produce the stock "please login to edit pages" page
3316          *
3317          * @deprecated in 1.19; throw an exception directly instead
3318          */
3319         function userNotLoggedInPage() {
3320                 wfDeprecated( __METHOD__, '1.19' );
3321                 throw new PermissionsError( 'edit' );
3322         }
3323
3324         /**
3325          * Show an error page saying to the user that he has insufficient permissions
3326          * to create a new page
3327          *
3328          * @deprecated in 1.19; throw an exception directly instead
3329          */
3330         function noCreatePermission() {
3331                 wfDeprecated( __METHOD__, '1.19' );
3332                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
3333                 throw new PermissionsError( $permission );
3334         }
3335
3336         /**
3337          * Creates a basic error page which informs the user that
3338          * they have attempted to edit a nonexistent section.
3339          */
3340         function noSuchSectionPage() {
3341                 global $wgOut;
3342
3343                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3344
3345                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
3346                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
3347                 $wgOut->addHTML( $res );
3348
3349                 $wgOut->returnToMain( false, $this->mTitle );
3350         }
3351
3352         /**
3353          * Produce the stock "your edit contains spam" page
3354          *
3355          * @param $match string Text which triggered one or more filters
3356          * @deprecated since 1.17 Use method spamPageWithContent() instead
3357          */
3358         static function spamPage( $match = false ) {
3359                 wfDeprecated( __METHOD__, '1.17' );
3360
3361                 global $wgOut, $wgTitle;
3362
3363                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3364
3365                 $wgOut->addHTML( '<div id="spamprotected">' );
3366                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3367                 if ( $match ) {
3368                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3369                 }
3370                 $wgOut->addHTML( '</div>' );
3371
3372                 $wgOut->returnToMain( false, $wgTitle );
3373         }
3374
3375         /**
3376          * Show "your edit contains spam" page with your diff and text
3377          *
3378          * @param $match string|Array|bool Text (or array of texts) which triggered one or more filters
3379          */
3380         public function spamPageWithContent( $match = false ) {
3381                 global $wgOut, $wgLang;
3382                 $this->textbox2 = $this->textbox1;
3383
3384                 if( is_array( $match ) ){
3385                         $match = $wgLang->listToText( $match );
3386                 }
3387                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3388
3389                 $wgOut->addHTML( '<div id="spamprotected">' );
3390                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3391                 if ( $match ) {
3392                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3393                 }
3394                 $wgOut->addHTML( '</div>' );
3395
3396                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3397                 $this->showDiff();
3398
3399                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3400                 $this->showTextbox2();
3401
3402                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3403         }
3404
3405         /**
3406          * Format an anchor fragment as it would appear for a given section name
3407          * @param $text String
3408          * @return String
3409          * @private
3410          */
3411         function sectionAnchor( $text ) {
3412                 global $wgParser;
3413                 return $wgParser->guessSectionNameFromWikiText( $text );
3414         }
3415
3416         /**
3417          * Check if the browser is on a blacklist of user-agents known to
3418          * mangle UTF-8 data on form submission. Returns true if Unicode
3419          * should make it through, false if it's known to be a problem.
3420          * @return bool
3421          * @private
3422          */
3423         function checkUnicodeCompliantBrowser() {
3424                 global $wgBrowserBlackList, $wgRequest;
3425
3426                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
3427                 if ( $currentbrowser === false ) {
3428                         // No User-Agent header sent? Trust it by default...
3429                         return true;
3430                 }
3431
3432                 foreach ( $wgBrowserBlackList as $browser ) {
3433                         if ( preg_match( $browser, $currentbrowser ) ) {
3434                                 return false;
3435                         }
3436                 }
3437                 return true;
3438         }
3439
3440         /**
3441          * Filter an input field through a Unicode de-armoring process if it
3442          * came from an old browser with known broken Unicode editing issues.
3443          *
3444          * @param $request WebRequest
3445          * @param $field String
3446          * @return String
3447          * @private
3448          */
3449         function safeUnicodeInput( $request, $field ) {
3450                 $text = rtrim( $request->getText( $field ) );
3451                 return $request->getBool( 'safemode' )
3452                         ? $this->unmakesafe( $text )
3453                         : $text;
3454         }
3455
3456         /**
3457          * @param $request WebRequest
3458          * @param $text string
3459          * @return string
3460          */
3461         function safeUnicodeText( $request, $text ) {
3462                 $text = rtrim( $text );
3463                 return $request->getBool( 'safemode' )
3464                         ? $this->unmakesafe( $text )
3465                         : $text;
3466         }
3467
3468         /**
3469          * Filter an output field through a Unicode armoring process if it is
3470          * going to an old browser with known broken Unicode editing issues.
3471          *
3472          * @param $text String
3473          * @return String
3474          * @private
3475          */
3476         function safeUnicodeOutput( $text ) {
3477                 global $wgContLang;
3478                 $codedText = $wgContLang->recodeForEdit( $text );
3479                 return $this->checkUnicodeCompliantBrowser()
3480                         ? $codedText
3481                         : $this->makesafe( $codedText );
3482         }
3483
3484         /**
3485          * A number of web browsers are known to corrupt non-ASCII characters
3486          * in a UTF-8 text editing environment. To protect against this,
3487          * detected browsers will be served an armored version of the text,
3488          * with non-ASCII chars converted to numeric HTML character references.
3489          *
3490          * Preexisting such character references will have a 0 added to them
3491          * to ensure that round-trips do not alter the original data.
3492          *
3493          * @param $invalue String
3494          * @return String
3495          * @private
3496          */
3497         function makesafe( $invalue ) {
3498                 // Armor existing references for reversability.
3499                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
3500
3501                 $bytesleft = 0;
3502                 $result = "";
3503                 $working = 0;
3504                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3505                         $bytevalue = ord( $invalue[$i] );
3506                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
3507                                 $result .= chr( $bytevalue );
3508                                 $bytesleft = 0;
3509                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
3510                                 $working = $working << 6;
3511                                 $working += ( $bytevalue & 0x3F );
3512                                 $bytesleft--;
3513                                 if ( $bytesleft <= 0 ) {
3514                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3515                                 }
3516                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
3517                                 $working = $bytevalue & 0x1F;
3518                                 $bytesleft = 1;
3519                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
3520                                 $working = $bytevalue & 0x0F;
3521                                 $bytesleft = 2;
3522                         } else { // 1111 0xxx
3523                                 $working = $bytevalue & 0x07;
3524                                 $bytesleft = 3;
3525                         }
3526                 }
3527                 return $result;
3528         }
3529
3530         /**
3531          * Reverse the previously applied transliteration of non-ASCII characters
3532          * back to UTF-8. Used to protect data from corruption by broken web browsers
3533          * as listed in $wgBrowserBlackList.
3534          *
3535          * @param $invalue String
3536          * @return String
3537          * @private
3538          */
3539         function unmakesafe( $invalue ) {
3540                 $result = "";
3541                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3542                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
3543                                 $i += 3;
3544                                 $hexstring = "";
3545                                 do {
3546                                         $hexstring .= $invalue[$i];
3547                                         $i++;
3548                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
3549
3550                                 // Do some sanity checks. These aren't needed for reversability,
3551                                 // but should help keep the breakage down if the editor
3552                                 // breaks one of the entities whilst editing.
3553                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) and ( strlen( $hexstring ) <= 6 ) ) {
3554                                         $codepoint = hexdec( $hexstring );
3555                                         $result .= codepointToUtf8( $codepoint );
3556                                 } else {
3557                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
3558                                 }
3559                         } else {
3560                                 $result .= substr( $invalue, $i, 1 );
3561                         }
3562                 }
3563                 // reverse the transform that we made for reversability reasons.
3564                 return strtr( $result, array( "&#x0" => "&#x" ) );
3565         }
3566 }