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