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