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. +5 bytes for ellipsis
 607                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary' ), 250 );
 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' ), 250 );
 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     = ''; #FIXME: track content object
 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 ( $this->mTitle->userIsWatching() ) {
 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          */
 803         function getContent( $def_text = false ) { #FIXME: deprecated, replace usage!
 804                 wfDeprecated( __METHOD__, '1.WD' );
 805
 806                 if ( $def_text !== null && $def_text !== false && $def_text !== '' ) {
 807                         $def_content = ContentHandler::makeContent( $def_text, $this->getTitle() );
 808                 } else {
 809                         $def_content = false;
 810                 }
 811
 812                 $content = $this->getContentObject( $def_content );
 813
 814                 return $content->serialize( $this->content_format ); #XXX: really use serialized form? use ContentHandler::getContentText() instead?
 815         }
 816
 817         private function getContentObject( $def_content = null ) { #FIXME: use this!
 818                 global $wgOut, $wgRequest;
 819
 820                 wfProfileIn( __METHOD__ );
 821
 822                 $content = false;
 823
 824                 // For message page not locally set, use the i18n message.
 825                 // For other non-existent articles, use preload text if any.
 826                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
 827                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
 828                                 # If this is a system message, get the default text.
 829                                 $msg = $this->mTitle->getDefaultMessageText();
 830
 831                                 $content = ContentHandler::makeContent( $msg, $this->mTitle );
 832                         }
 833                         if ( $content === false ) {
 834                                 # If requested, preload some text.
 835                                 $preload = $wgRequest->getVal( 'preload',
 836                                         // Custom preload text for new sections
 837                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 838
 839                                 $content = $this->getPreloadedContent( $preload );
 840                         }
 841                 // For existing pages, get text based on "undo" or section parameters.
 842                 } else {
 843                         if ( $this->section != '' ) {
 844                                 // Get section edit text (returns $def_text for invalid sections)
 845                                 $orig = $this->getOriginalContent();
 846                                 $content = $orig ? $orig->getSection( $this->section ) : null;
 847
 848                                 if ( !$content ) $content = $def_content;
 849                         } else {
 850                                 $undoafter = $wgRequest->getInt( 'undoafter' );
 851                                 $undo = $wgRequest->getInt( 'undo' );
 852
 853                                 if ( $undo > 0 && $undoafter > 0 ) {
 854                                         if ( $undo < $undoafter ) {
 855                                                 # If they got undoafter and undo round the wrong way, switch them
 856                                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 857                                         }
 858
 859                                         $undorev = Revision::newFromId( $undo );
 860                                         $oldrev = Revision::newFromId( $undoafter );
 861
 862                                         # Sanity check, make sure it's the right page,
 863                                         # the revisions exist and they were not deleted.
 864                                         # Otherwise, $content will be left as-is.
 865                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 866                                                 $undorev->getPage() == $oldrev->getPage() &&
 867                                                 $undorev->getPage() == $this->mTitle->getArticleID() &&
 868                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 869                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 870
 871                                                 $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
 872
 873                                                 if ( $content === false ) {
 874                                                         # Warn the user that something went wrong
 875                                                         $undoMsg = 'failure';
 876                                                 } else {
 877                                                         # Inform the user of our success and set an automatic edit summary
 878                                                         $undoMsg = 'success';
 879
 880                                                         # If we just undid one rev, use an autosummary
 881                                                         $firstrev = $oldrev->getNext();
 882                                                         if ( $firstrev && $firstrev->getId() == $undo ) {
 883                                                                 $undoSummary = wfMsgForContent( 'undo-summary', $undo, $undorev->getUserText() );
 884                                                                 if ( $this->summary === '' ) {
 885                                                                         $this->summary = $undoSummary;
 886                                                                 } else {
 887                                                                         $this->summary = $undoSummary . wfMsgForContent( 'colon-separator' ) . $this->summary;
 888                                                                 }
 889                                                                 $this->undidRev = $undo;
 890                                                         }
 891                                                         $this->formtype = 'diff';
 892                                                 }
 893                                         } else {
 894                                                 // Failed basic sanity checks.
 895                                                 // Older revisions may have been removed since the link
 896                                                 // was created, or we may simply have got bogus input.
 897                                                 $undoMsg = 'norev';
 898                                         }
 899
 900                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
 901                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
 902                                                 wfMsgNoTrans( 'undo-' . $undoMsg ) . '</div>', true, /* interface */true );
 903                                 }
 904
 905                                 if ( $content === false ) {
 906                                         $content = $this->getOriginalContent();
 907                                 }
 908                         }
 909                 }
 910
 911                 wfProfileOut( __METHOD__ );
 912                 return $content;
 913         }
 914
 915         /**
 916          * Get the content of the wanted revision, without section extraction.
 917          *
 918          * The result of this function can be used to compare user's input with
 919          * section replaced in its context (using WikiPage::replaceSection())
 920          * to the original text of the edit.
 921          *
 922          * This difers from Article::getContent() that when a missing revision is
 923          * encountered the result will be an empty string and not the
 924          * 'missing-article' message.
 925          *
 926          * @since 1.19
 927          * @return string
 928          */
 929         private function getOriginalContent() {
 930                 if ( $this->section == 'new' ) {
 931                         return $this->getCurrentContent();
 932                 }
 933                 $revision = $this->mArticle->getRevisionFetched();
 934                 if ( $revision === null ) {
 935                         if ( !$this->content_model ) $this->content_model = $this->getTitle()->getContentModel();
 936                         $handler = ContentHandler::getForModelID( $this->content_model );
 937
 938                         return $handler->makeEmptyContent();
 939                 }
 940                 $content = $revision->getContent();
 941                 return $content;
 942         }
 943
 944         /**
 945          * Get the current content of the page. This is basically similar to
 946          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
 947          * content object is returned instead of null.
 948          *
 949          * @since 1.WD
 950          * @return string
 951          */
 952         private function getCurrentContent() {
 953                 $rev = $this->mArticle->getRevision();
 954                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
 955
 956                 if ( $content  === false || $content === null ) {
 957                         if ( !$this->content_model ) $this->content_model = $this->getTitle()->getContentModel();
 958                         $handler = ContentHandler::getForModelID( $this->content_model );
 959
 960                         return $handler->makeEmptyContent();
 961                 } else {
 962                         #FIXME: nasty side-effect!
 963                         $this->content_model = $rev->getContentModel();
 964                         $this->content_format = $rev->getContentFormat();
 965
 966                         return $content;
 967                 }
 968         }
 969
 970
 971         /**
 972          * Use this method before edit() to preload some text into the edit box
 973          *
 974          * @param $text string
 975          * @deprecated since 1.WD
 976          */
 977         public function setPreloadedText( $text ) {
 978                 wfDeprecated( __METHOD__, "1.WD" );
 979
 980                 $content = ContentHandler::makeContent( $text, $this->getTitle() );
 981
 982                 $this->setPreloadedContent( $content );
 983         }
 984
 985         /**
 986          * Use this method before edit() to preload some content into the edit box
 987          *
 988          * @param $content Content
 989          *
 990          * @since 1.WD
 991          */
 992         public function setPreloadedContent( Content $content ) {
 993                 $this->mPreloadedContent = $content;
 994         }
 995
 996         /**
 997          * Get the contents to be preloaded into the box, either set by
 998          * an earlier setPreloadText() or by loading the given page.
 999          *
1000          * @param $preload String: representing the title to preload from.
1001          *
1002          * @return String
1003          *
1004          * @deprecated since 1.WD, use getPreloadedContent() instead
1005          */
1006         protected function getPreloadedText( $preload ) { #NOTE: B/C only, replace usage!
1007                 wfDeprecated( __METHOD__, "1.WD" );
1008
1009                 $content = $this->getPreloadedContent( $preload );
1010                 $text = $content->serialize( $this->content_format ); #XXX: really use serialized form? use ContentHandler::getContentText() instead?!
1011
1012                 return $text;
1013         }
1014
1015         /**
1016          * Get the contents to be preloaded into the box, either set by
1017          * an earlier setPreloadText() or by loading the given page.
1018          *
1019          * @param $preload String: representing the title to preload from.
1020          *
1021          * @return Content
1022          *
1023          * @since 1.WD
1024          */
1025         protected function getPreloadedContent( $preload ) { #@todo: use this!
1026                 global $wgUser;
1027
1028                 if ( !empty( $this->mPreloadContent ) ) {
1029                         return $this->mPreloadContent;
1030                 }
1031
1032                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1033
1034                 if ( $preload === '' ) {
1035                         return $handler->makeEmptyContent();
1036                 }
1037
1038                 $title = Title::newFromText( $preload );
1039                 # Check for existence to avoid getting MediaWiki:Noarticletext
1040                 if ( $title === null || !$title->exists() || !$title->userCan( 'read' ) ) {
1041                         return $handler->makeEmptyContent();
1042                 }
1043
1044                 $page = WikiPage::factory( $title );
1045                 if ( $page->isRedirect() ) {
1046                         $title = $page->getRedirectTarget();
1047                         # Same as before
1048                         if ( $title === null || !$title->exists() || !$title->userCan( 'read' ) ) {
1049                                 return $handler->makeEmptyContent();
1050                         }
1051                         $page = WikiPage::factory( $title );
1052                 }
1053
1054                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1055                 $content = $page->getContent( Revision::RAW );
1056
1057                 return $content->preloadTransform( $title, $parserOptions );
1058         }
1059
1060         /**
1061          * Make sure the form isn't faking a user's credentials.
1062          *
1063          * @param $request WebRequest
1064          * @return bool
1065          * @private
1066          */
1067         function tokenOk( &$request ) {
1068                 global $wgUser;
1069                 $token = $request->getVal( 'wpEditToken' );
1070                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1071                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1072                 return $this->mTokenOk;
1073         }
1074
1075         /**
1076          * Attempt submission
1077          * @return bool false if output is done, true if the rest of the form should be displayed
1078          */
1079         function attemptSave() {
1080                 global $wgUser, $wgOut;
1081
1082                 $resultDetails = false;
1083                 # Allow bots to exempt some edits from bot flagging
1084                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1085                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1086                 // FIXME: once the interface for internalAttemptSave() is made nicer, this should use the message in $status
1087                 if ( $status->value == self::AS_SUCCESS_UPDATE || $status->value == self::AS_SUCCESS_NEW_ARTICLE ) {
1088                         $this->didSave = true;
1089                 }
1090
1091                 switch ( $status->value ) {
1092                         case self::AS_HOOK_ERROR_EXPECTED:
1093                         case self::AS_CONTENT_TOO_BIG:
1094                         case self::AS_ARTICLE_WAS_DELETED:
1095                         case self::AS_CONFLICT_DETECTED:
1096                         case self::AS_SUMMARY_NEEDED:
1097                         case self::AS_TEXTBOX_EMPTY:
1098                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1099                         case self::AS_END:
1100                                 return true;
1101
1102                         case self::AS_HOOK_ERROR:
1103                                 return false;
1104
1105                         case self::AS_PARSE_ERROR:
1106                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>');
1107                                 #FIXME: cause editform to be shown again, not just an error!
1108                                 return false;
1109
1110                         case self::AS_SUCCESS_NEW_ARTICLE:
1111                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1112                                 $anchor = isset ( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1113                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1114                                 return false;
1115
1116                         case self::AS_SUCCESS_UPDATE:
1117                                 $extraQuery = '';
1118                                 $sectionanchor = $resultDetails['sectionanchor'];
1119
1120                                 // Give extensions a chance to modify URL query on update
1121                                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this->mArticle, &$sectionanchor, &$extraQuery ) );
1122
1123                                 if ( $resultDetails['redirect'] ) {
1124                                         if ( $extraQuery == '' ) {
1125                                                 $extraQuery = 'redirect=no';
1126                                         } else {
1127                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1128                                         }
1129                                 }
1130                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1131                                 return false;
1132
1133                         case self::AS_BLANK_ARTICLE:
1134                                 $wgOut->redirect( $this->getContextTitle()->getFullURL() );
1135                                 return false;
1136
1137                         case self::AS_SPAM_ERROR:
1138                                 $this->spamPageWithContent( $resultDetails['spam'] );
1139                                 return false;
1140
1141                         case self::AS_BLOCKED_PAGE_FOR_USER:
1142                                 throw new UserBlockedError( $wgUser->getBlock() );
1143
1144                         case self::AS_IMAGE_REDIRECT_ANON:
1145                         case self::AS_IMAGE_REDIRECT_LOGGED:
1146                                 throw new PermissionsError( 'upload' );
1147
1148                         case self::AS_READ_ONLY_PAGE_ANON:
1149                         case self::AS_READ_ONLY_PAGE_LOGGED:
1150                                 throw new PermissionsError( 'edit' );
1151
1152                         case self::AS_READ_ONLY_PAGE:
1153                                 throw new ReadOnlyError;
1154
1155                         case self::AS_RATE_LIMITED:
1156                                 throw new ThrottledError();
1157
1158                         case self::AS_NO_CREATE_PERMISSION:
1159                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1160                                 throw new PermissionsError( $permission );
1161
1162                         default:
1163                                 // We don't recognize $status->value. The only way that can happen
1164                                 // is if an extension hook aborted from inside ArticleSave.
1165                                 // Render the status object into $this->hookError
1166                                 // FIXME this sucks, we should just use the Status object throughout
1167                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1168                                         '</div>';
1169                                 return true;
1170                 }
1171         }
1172
1173         /**
1174          * Attempt submission (no UI)
1175          *
1176          * @param $result
1177          * @param $bot bool
1178          *
1179          * @return Status object, possibly with a message, but always with one of the AS_* constants in $status->value,
1180          *
1181          * FIXME: This interface is TERRIBLE, but hard to get rid of due to various error display idiosyncrasies. There are
1182          * also lots of cases where error metadata is set in the object and retrieved later instead of being returned, e.g.
1183          * AS_CONTENT_TOO_BIG and AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some time.
1184          */
1185         function internalAttemptSave( &$result, $bot = false ) {
1186                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1187
1188                 $status = Status::newGood();
1189
1190                 wfProfileIn( __METHOD__  );
1191                 wfProfileIn( __METHOD__ . '-checks' );
1192
1193                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
1194                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1195                         $status->fatal( 'hookaborted' );
1196                         $status->value = self::AS_HOOK_ERROR;
1197                         wfProfileOut( __METHOD__ . '-checks' );
1198                         wfProfileOut( __METHOD__  );
1199                         return $status;
1200                 }
1201
1202                 # Check image redirect
1203                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1204                         Title::newFromRedirect( $this->textbox1 ) instanceof Title && #FIXME: use content handler to check for redirect
1205                         !$wgUser->isAllowed( 'upload' ) ) {
1206                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1207                                 $status->setResult( false, $code );
1208
1209                                 wfProfileOut( __METHOD__ . '-checks' );
1210                                 wfProfileOut( __METHOD__  );
1211
1212                                 return $status;
1213                 }
1214
1215                 # Check for spam
1216                 $match = self::matchSummarySpamRegex( $this->summary );
1217                 if ( $match === false ) {
1218                         $match = self::matchSpamRegex( $this->textbox1 );
1219                 }
1220                 if ( $match !== false ) {
1221                         $result['spam'] = $match;
1222                         $ip = $wgRequest->getIP();
1223                         $pdbk = $this->mTitle->getPrefixedDBkey();
1224                         $match = str_replace( "\n", '', $match );
1225                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1226                         $status->fatal( 'spamprotectionmatch', $match );
1227                         $status->value = self::AS_SPAM_ERROR;
1228                         wfProfileOut( __METHOD__ . '-checks' );
1229                         wfProfileOut( __METHOD__ );
1230                         return $status;
1231                 }
1232                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
1233                         # Error messages etc. could be handled within the hook...
1234                         $status->fatal( 'hookaborted' );
1235                         $status->value = self::AS_HOOK_ERROR;
1236                         wfProfileOut( __METHOD__ . '-checks' );
1237                         wfProfileOut( __METHOD__ );
1238                         return $status;
1239                 } elseif ( $this->hookError != '' ) {
1240                         # ...or the hook could be expecting us to produce an error
1241                         $status->fatal( 'hookaborted' );
1242                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1243                         wfProfileOut( __METHOD__ . '-checks' );
1244                         wfProfileOut( __METHOD__ );
1245                         return $status;
1246                 }
1247
1248                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1249                         // Auto-block user's IP if the account was "hard" blocked
1250                         $wgUser->spreadAnyEditBlock();
1251                         # Check block state against master, thus 'false'.
1252                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1253                         wfProfileOut( __METHOD__ . '-checks' );
1254                         wfProfileOut( __METHOD__ );
1255                         return $status;
1256                 }
1257
1258                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1259                 if ( $this->kblength > $wgMaxArticleSize ) {
1260                         // Error will be displayed by showEditForm()
1261                         $this->tooBig = true;
1262                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1263                         wfProfileOut( __METHOD__ . '-checks' );
1264                         wfProfileOut( __METHOD__ );
1265                         return $status;
1266                 }
1267
1268                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1269                         if ( $wgUser->isAnon() ) {
1270                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1271                                 wfProfileOut( __METHOD__ . '-checks' );
1272                                 wfProfileOut( __METHOD__ );
1273                                 return $status;
1274                         } else {
1275                                 $status->fatal( 'readonlytext' );
1276                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1277                                 wfProfileOut( __METHOD__ . '-checks' );
1278                                 wfProfileOut( __METHOD__ );
1279                                 return $status;
1280                         }
1281                 }
1282
1283                 if ( wfReadOnly() ) {
1284                         $status->fatal( 'readonlytext' );
1285                         $status->value = self::AS_READ_ONLY_PAGE;
1286                         wfProfileOut( __METHOD__ . '-checks' );
1287                         wfProfileOut( __METHOD__ );
1288                         return $status;
1289                 }
1290                 if ( $wgUser->pingLimiter() ) {
1291                         $status->fatal( 'actionthrottledtext' );
1292                         $status->value = self::AS_RATE_LIMITED;
1293                         wfProfileOut( __METHOD__ . '-checks' );
1294                         wfProfileOut( __METHOD__ );
1295                         return $status;
1296                 }
1297
1298                 # If the article has been deleted while editing, don't save it without
1299                 # confirmation
1300                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1301                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1302                         wfProfileOut( __METHOD__ . '-checks' );
1303                         wfProfileOut( __METHOD__ );
1304                         return $status;
1305                 }
1306
1307                 wfProfileOut( __METHOD__ . '-checks' );
1308
1309                 // Use SELECT FOR UPDATE here to avoid transaction collision in
1310                 // WikiPage::updateRevisionOn() and ending in the self::AS_END case.
1311                 $this->mArticle->loadPageData( 'forupdate' );
1312                 $new = !$this->mArticle->exists();
1313
1314                 try {
1315                         if ( $new ) {
1316                                 // Late check for create permission, just in case *PARANOIA*
1317                                 if ( !$this->mTitle->userCan( 'create' ) ) {
1318                                         $status->fatal( 'nocreatetext' );
1319                                         $status->value = self::AS_NO_CREATE_PERMISSION;
1320                                         wfDebug( __METHOD__ . ": no create permission\n" );
1321                                         wfProfileOut( __METHOD__ );
1322                                         return $status;
1323                                 }
1324
1325                                 # Don't save a new article if it's blank.
1326                                 if ( $this->textbox1 == '' ) {
1327                                         $status->setResult( false, self::AS_BLANK_ARTICLE );
1328                                         wfProfileOut( __METHOD__ );
1329                                         return $status;
1330                                 }
1331
1332                                 // Run post-section-merge edit filter
1333                                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
1334                                         # Error messages etc. could be handled within the hook...
1335                                         $status->fatal( 'hookaborted' );
1336                                         $status->value = self::AS_HOOK_ERROR;
1337                                         wfProfileOut( __METHOD__ );
1338                                         return $status;
1339                                 } elseif ( $this->hookError != '' ) {
1340                                         # ...or the hook could be expecting us to produce an error
1341                                         $status->fatal( 'hookaborted' );
1342                                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1343                                         wfProfileOut( __METHOD__ );
1344                                         return $status;
1345                                 }
1346
1347                                 $content = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format );
1348
1349                                 $result['sectionanchor'] = '';
1350                                 if ( $this->section == 'new' ) {
1351                                         if ( $this->sectiontitle !== '' ) {
1352                                                 // Insert the section title above the content.
1353                                                 $content = $content->addSectionHeader( $this->sectiontitle );
1354
1355                                                 // Jump to the new section
1356                                                 $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1357
1358                                                 // If no edit summary was specified, create one automatically from the section
1359                                                 // title and have it link to the new section. Otherwise, respect the summary as
1360                                                 // passed.
1361                                                 if ( $this->summary === '' ) {
1362                                                         $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1363                                                         $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSectionTitle );
1364                                                 }
1365                                         } elseif ( $this->summary !== '' ) {
1366                                                 // Insert the section title above the content.
1367                                                 $content = $content->addSectionHeader( $this->sectiontitle );
1368
1369                                                 // Jump to the new section
1370                                                 $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1371
1372                                                 // Create a link to the new section from the edit summary.
1373                                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
1374                                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1375                                         }
1376                                 }
1377
1378                                 $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1379
1380                         } else { # not $new
1381
1382                                 # Article exists. Check for edit conflict.
1383
1384                                 $this->mArticle->clear(); # Force reload of dates, etc.
1385                                 $timestamp = $this->mArticle->getTimestamp();
1386
1387                                 wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1388
1389                                 if ( $timestamp != $this->edittime ) {
1390                                         $this->isConflict = true;
1391                                         if ( $this->section == 'new' ) {
1392                                                 if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1393                                                         $this->mArticle->getComment() == $this->summary ) {
1394                                                         // Probably a duplicate submission of a new comment.
1395                                                         // This can happen when squid resends a request after
1396                                                         // a timeout but the first one actually went through.
1397                                                         wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
1398                                                 } else {
1399                                                         // New comment; suppress conflict.
1400                                                         $this->isConflict = false;
1401                                                         wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1402                                                 }
1403                                         } elseif ( $this->section == '' && $this->userWasLastToEdit( $wgUser->getId(), $this->edittime ) ) {
1404                                                 # Suppress edit conflict with self, except for section edits where merging is required.
1405                                                 wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1406                                                 $this->isConflict = false;
1407                                         }
1408                                 }
1409
1410                                 // If sectiontitle is set, use it, otherwise use the summary as the section title (for
1411                                 // backwards compatibility with old forms/bots).
1412                                 if ( $this->sectiontitle !== '' ) {
1413                                         $sectionTitle = $this->sectiontitle;
1414                                 } else {
1415                                         $sectionTitle = $this->summary;
1416                                 }
1417
1418                                 $textbox_content = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format );
1419                                 $content = null;
1420
1421                                 if ( $this->isConflict ) {
1422                                         wfDebug( __METHOD__ . ": conflict! getting section '$this->section' for time '$this->edittime' (article time '{$timestamp}')\n" );
1423                                         $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle, $this->edittime );
1424                                 } else {
1425                                         wfDebug( __METHOD__ . ": getting section '$this->section'\n" );
1426                                         $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle );
1427                                 }
1428
1429                                 if ( is_null( $content ) ) {
1430                                         wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1431                                         $this->isConflict = true;
1432                                         $content = $textbox_content; // do not try to merge here!
1433                                 } elseif ( $this->isConflict ) {
1434                                         # Attempt merge
1435                                         if ( $this->mergeChangesIntoContent( $textbox_content ) ) {
1436                                                 // Successful merge! Maybe we should tell the user the good news?
1437                                                 $this->isConflict = false;
1438                                                 $content = $textbox_content;
1439                                                 wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1440                                         } else {
1441                                                 $this->section = '';
1442                                                 #$this->textbox1 = $text; #redundant, nothing to do here?
1443                                                 wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1444                                         }
1445                                 }
1446
1447                                 if ( $this->isConflict ) {
1448                                         $status->setResult( false, self::AS_CONFLICT_DETECTED );
1449                                         wfProfileOut( __METHOD__ );
1450                                         return $status;
1451                                 }
1452
1453                                 // Run post-section-merge edit filter
1454                                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $content->serialize( $this->content_format ), &$this->hookError, $this->summary ) )
1455                                                 || !wfRunHooks( 'EditFilterMergedContent', array( $this, $content, &$this->hookError, $this->summary ) ) ) {
1456                                         # Error messages etc. could be handled within the hook...
1457                                         $status->fatal( 'hookaborted' );
1458                                         $status->value = self::AS_HOOK_ERROR;
1459                                         wfProfileOut( __METHOD__ );
1460                                         return $status;
1461                                 } elseif ( $this->hookError != '' ) {
1462                                         # ...or the hook could be expecting us to produce an error
1463                                         $status->fatal( 'hookaborted' );
1464                                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1465                                         wfProfileOut( __METHOD__ );
1466                                         return $status;
1467                                 }
1468
1469                                 $content = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format );
1470
1471                                 # Handle the user preference to force summaries here, but not for null edits
1472                                 if ( $this->section != 'new' && !$this->allowBlankSummary
1473                                         && !$content->equals( $this->getOriginalContent() )
1474                                         && !$content->isRedirect() ) # check if it's not a redirect
1475                                 {
1476                                         if ( md5( $this->summary ) == $this->autoSumm ) {
1477                                                 $this->missingSummary = true;
1478                                                 $status->fatal( 'missingsummary' );
1479                                                 $status->value = self::AS_SUMMARY_NEEDED;
1480                                                 wfProfileOut( __METHOD__ );
1481                                                 return $status;
1482                                         }
1483                                 }
1484
1485                                 # And a similar thing for new sections
1486                                 if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1487                                         if ( trim( $this->summary ) == '' ) {
1488                                                 $this->missingSummary = true;
1489                                                 $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1490                                                 $status->value = self::AS_SUMMARY_NEEDED;
1491                                                 wfProfileOut( __METHOD__ );
1492                                                 return $status;
1493                                         }
1494                                 }
1495
1496                                 # All's well
1497                                 wfProfileIn( __METHOD__ . '-sectionanchor' );
1498                                 $sectionanchor = '';
1499                                 if ( $this->section == 'new' ) {
1500                                         if ( $this->textbox1 == '' ) {
1501                                                 $this->missingComment = true;
1502                                                 $status->fatal( 'missingcommenttext' );
1503                                                 $status->value = self::AS_TEXTBOX_EMPTY;
1504                                                 wfProfileOut( __METHOD__ . '-sectionanchor' );
1505                                                 wfProfileOut( __METHOD__ );
1506                                                 return $status;
1507                                         }
1508                                         if ( $this->sectiontitle !== '' ) {
1509                                                 $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1510                                                 // If no edit summary was specified, create one automatically from the section
1511                                                 // title and have it link to the new section. Otherwise, respect the summary as
1512                                                 // passed.
1513                                                 if ( $this->summary === '' ) {
1514                                                         $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1515                                                         $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSectionTitle );
1516                                                 }
1517                                         } elseif ( $this->summary !== '' ) {
1518                                                 $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1519                                                 # This is a new section, so create a link to the new section
1520                                                 # in the revision summary.
1521                                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
1522                                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1523                                         }
1524                                 } elseif ( $this->section != '' ) {
1525                                         # Try to get a section anchor from the section source, redirect to edited section if header found
1526                                         # XXX: might be better to integrate this into Article::replaceSection
1527                                         # for duplicate heading checking and maybe parsing
1528                                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1529                                         # we can't deal with anchors, includes, html etc in the header for now,
1530                                         # headline would need to be parsed to improve this
1531                                         if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1532                                                 $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1533                                         }
1534                                 }
1535                                 $result['sectionanchor'] = $sectionanchor;
1536                                 wfProfileOut( __METHOD__ . '-sectionanchor' );
1537
1538                                 // Save errors may fall down to the edit form, but we've now
1539                                 // merged the section into full text. Clear the section field
1540                                 // so that later submission of conflict forms won't try to
1541                                 // replace that into a duplicated mess.
1542                                         $this->textbox1 = $content->serialize( $this->content_format );
1543                                 $this->section = '';
1544
1545                                 $status->value = self::AS_SUCCESS_UPDATE;
1546                         }
1547
1548                         // Check for length errors again now that the section is merged in
1549                                 $this->kblength = (int)( strlen( $content->serialize( $this->content_format ) ) / 1024 );
1550                         if ( $this->kblength > $wgMaxArticleSize ) {
1551                                 $this->tooBig = true;
1552                                 $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1553                                 wfProfileOut( __METHOD__ );
1554                                 return $status;
1555                         }
1556
1557                         $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1558                                 ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1559                                 ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1560                                 ( $bot ? EDIT_FORCE_BOT : 0 );
1561
1562                                 $doEditStatus = $this->mArticle->doEditContent( $content, $this->summary, $flags, false, null, $this->content_format );
1563
1564                         if ( $doEditStatus->isOK() ) {
1565                                         $result['redirect'] = $content->isRedirect();
1566                                 $this->commitWatch();
1567                                 wfProfileOut( __METHOD__ );
1568                                 return $status;
1569                         } else {
1570                                 // Failure from doEdit()
1571                                 // Show the edit conflict page for certain recognized errors from doEdit(),
1572                                 // but don't show it for errors from extension hooks
1573                                 $errors = $doEditStatus->getErrorsArray();
1574                                 if ( in_array( $errors[0][0], array( 'edit-gone-missing', 'edit-conflict',
1575                                         'edit-already-exists' ) ) )
1576                                 {
1577                                         $this->isConflict = true;
1578                                         // Destroys data doEdit() put in $status->value but who cares
1579                                         $doEditStatus->value = self::AS_END;
1580                                 }
1581                                 wfProfileOut( __METHOD__ );
1582                                 return $doEditStatus;
1583                         }
1584                 } catch (MWContentSerializationException $ex) {
1585                         $status->fatal( 'content-failed-to-parse', $this->content_model, $this->content_format, $ex->getMessage() );
1586                         $status->value = self::AS_PARSE_ERROR;
1587                         wfProfileOut( __METHOD__ );
1588                         return $status;
1589                 }
1590         }
1591
1592         /**
1593          * Commit the change of watch status
1594          */
1595         protected function commitWatch() {
1596                 global $wgUser;
1597                 if ( $this->watchthis xor $this->mTitle->userIsWatching() ) {
1598                         $dbw = wfGetDB( DB_MASTER );
1599                         $dbw->begin( __METHOD__ );
1600                         if ( $this->watchthis ) {
1601                                 WatchAction::doWatch( $this->mTitle, $wgUser );
1602                         } else {
1603                                 WatchAction::doUnwatch( $this->mTitle, $wgUser );
1604                         }
1605                         $dbw->commit( __METHOD__ );
1606                 }
1607         }
1608
1609         /**
1610          * Check if no edits were made by other users since
1611          * the time a user started editing the page. Limit to
1612          * 50 revisions for the sake of performance.
1613          *
1614          * @param $id int
1615          * @param $edittime string
1616          *
1617          * @return bool
1618          */
1619         protected function userWasLastToEdit( $id, $edittime ) {
1620                 if ( !$id ) return false;
1621                 $dbw = wfGetDB( DB_MASTER );
1622                 $res = $dbw->select( 'revision',
1623                         'rev_user',
1624                         array(
1625                                 'rev_page' => $this->mTitle->getArticleID(),
1626                                 'rev_timestamp > ' . $dbw->addQuotes( $dbw->timestamp( $edittime ) )
1627                         ),
1628                         __METHOD__,
1629                         array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
1630                 foreach ( $res as $row ) {
1631                         if ( $row->rev_user != $id ) {
1632                                 return false;
1633                         }
1634                 }
1635                 return true;
1636         }
1637
1638         /**
1639          * @private
1640          * @todo document
1641          *
1642          * @parma $editText string
1643          *
1644          * @return bool
1645          * @deprecated since 1.WD, use mergeChangesIntoContent() instead
1646          */
1647         function mergeChangesInto( &$editText ){
1648                 wfDebug( __METHOD__, "1.WD" );
1649
1650                 $editContent = ContentHandler::makeContent( $editText, $this->getTitle(), $this->content_model, $this->content_format );
1651
1652                 $ok = $this->mergeChangesIntoContent( $editContent );
1653
1654                 if ( $ok ) {
1655                         $editText = $editContent->serialize( $this->content_format ); #XXX: really serialize?!
1656                         return true;
1657                 } else {
1658                         return false;
1659                 }
1660         }
1661
1662         /**
1663          * @private
1664          * @todo document
1665          *
1666          * @parma $editText string
1667          *
1668          * @return bool
1669          * @since since 1.WD
1670          */
1671         private function mergeChangesIntoContent( &$editContent ){
1672                 wfProfileIn( __METHOD__ );
1673
1674                 $db = wfGetDB( DB_MASTER );
1675
1676                 // This is the revision the editor started from
1677                 $baseRevision = $this->getBaseRevision();
1678                 if ( is_null( $baseRevision ) ) {
1679                         wfProfileOut( __METHOD__ );
1680                         return false;
1681                 }
1682                 $baseContent = $baseRevision->getContent();
1683
1684                 // The current state, we want to merge updates into it
1685                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1686                 if ( is_null( $currentRevision ) ) {
1687                         wfProfileOut( __METHOD__ );
1688                         return false;
1689                 }
1690                 $currentContent = $currentRevision->getContent();
1691
1692                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
1693
1694                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
1695
1696                 if ( $result ) {
1697                         $editContent = $result;
1698                         wfProfileOut( __METHOD__ );
1699                         return true;
1700                 } else {
1701                         wfProfileOut( __METHOD__ );
1702                         return false;
1703                 }
1704         }
1705
1706         /**
1707          * @return Revision
1708          */
1709         function getBaseRevision() {
1710                 if ( !$this->mBaseRevision ) {
1711                         $db = wfGetDB( DB_MASTER );
1712                         $baseRevision = Revision::loadFromTimestamp(
1713                                 $db, $this->mTitle, $this->edittime );
1714                         return $this->mBaseRevision = $baseRevision;
1715                 } else {
1716                         return $this->mBaseRevision;
1717                 }
1718         }
1719
1720         /**
1721          * Check given input text against $wgSpamRegex, and return the text of the first match.
1722          *
1723          * @param $text string
1724          *
1725          * @return string|bool matching string or false
1726          */
1727         public static function matchSpamRegex( $text ) {
1728                 global $wgSpamRegex;
1729                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1730                 $regexes = (array)$wgSpamRegex;
1731                 return self::matchSpamRegexInternal( $text, $regexes );
1732         }
1733
1734         /**
1735          * Check given input text against $wgSpamRegex, and return the text of the first match.
1736          *
1737          * @parma $text string
1738          *
1739          * @return string|bool  matching string or false
1740          */
1741         public static function matchSummarySpamRegex( $text ) {
1742                 global $wgSummarySpamRegex;
1743                 $regexes = (array)$wgSummarySpamRegex;
1744                 return self::matchSpamRegexInternal( $text, $regexes );
1745         }
1746
1747         /**
1748          * @param $text string
1749          * @param $regexes array
1750          * @return bool|string
1751          */
1752         protected static function matchSpamRegexInternal( $text, $regexes ) {
1753                 foreach ( $regexes as $regex ) {
1754                         $matches = array();
1755                         if ( preg_match( $regex, $text, $matches ) ) {
1756                                 return $matches[0];
1757                         }
1758                 }
1759                 return false;
1760         }
1761
1762         function setHeaders() {
1763                 global $wgOut, $wgUser;
1764
1765                 $wgOut->addModules( 'mediawiki.action.edit' );
1766
1767                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
1768                         $wgOut->addModules( 'mediawiki.legacy.preview' );
1769                 }
1770                 // Bug #19334: textarea jumps when editing articles in IE8
1771                 $wgOut->addStyle( 'common/IE80Fixes.css', 'screen', 'IE 8' );
1772
1773                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1774
1775                 # Enabled article-related sidebar, toplinks, etc.
1776                 $wgOut->setArticleRelated( true );
1777
1778                 $contextTitle = $this->getContextTitle();
1779                 if ( $this->isConflict ) {
1780                         $msg = 'editconflict';
1781                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
1782                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1783                 } else {
1784                         $msg = $contextTitle->exists() || ( $contextTitle->getNamespace() == NS_MEDIAWIKI && $contextTitle->getDefaultMessageText() !== false ) ?
1785                                 'editing' : 'creating';
1786                 }
1787                 # Use the title defined by DISPLAYTITLE magic word when present
1788                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
1789                 if ( $displayTitle === false ) {
1790                         $displayTitle = $contextTitle->getPrefixedText();
1791                 }
1792                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
1793         }
1794
1795         /**
1796          * Show all applicable editing introductions
1797          */
1798         protected function showIntro() {
1799                 global $wgOut, $wgUser;
1800                 if ( $this->suppressIntro ) {
1801                         return;
1802                 }
1803
1804                 $namespace = $this->mTitle->getNamespace();
1805
1806                 if ( $namespace == NS_MEDIAWIKI ) {
1807                         # Show a warning if editing an interface message
1808                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
1809                 } else if( $namespace == NS_FILE ) {
1810                         # Show a hint to shared repo
1811                         $file = wfFindFile( $this->mTitle );
1812                         if( $file && !$file->isLocal() ) {
1813                                 $descUrl = $file->getDescriptionUrl();
1814                                 # there must be a description url to show a hint to shared repo
1815                                 if( $descUrl ) {
1816                                         if( !$this->mTitle->exists() ) {
1817                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array (
1818                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
1819                                                 ) );
1820                                         } else {
1821                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
1822                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
1823                                                 ) );
1824                                         }
1825                                 }
1826                         }
1827                 }
1828
1829                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
1830                 # Show log extract when the user is currently blocked
1831                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
1832                         $parts = explode( '/', $this->mTitle->getText(), 2 );
1833                         $username = $parts[0];
1834                         $user = User::newFromName( $username, false /* allow IP users*/ );
1835                         $ip = User::isIP( $username );
1836                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
1837                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
1838                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
1839                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
1840                                 LogEventsList::showLogExtract(
1841                                         $wgOut,
1842                                         'block',
1843                                         $user->getUserPage(),
1844                                         '',
1845                                         array(
1846                                                 'lim' => 1,
1847                                                 'showIfEmpty' => false,
1848                                                 'msgKey' => array(
1849                                                         'blocked-notice-logextract',
1850                                                         $user->getName() # Support GENDER in notice
1851                                                 )
1852                                         )
1853                                 );
1854                         }
1855                 }
1856                 # Try to add a custom edit intro, or use the standard one if this is not possible.
1857                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
1858                         if ( $wgUser->isLoggedIn() ) {
1859                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
1860                         } else {
1861                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
1862                         }
1863                 }
1864                 # Give a notice if the user is editing a deleted/moved page...
1865                 if ( !$this->mTitle->exists() ) {
1866                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
1867                                 '', array( 'lim' => 10,
1868                                            'conds' => array( "log_action != 'revision'" ),
1869                                            'showIfEmpty' => false,
1870                                            'msgKey' => array( 'recreate-moveddeleted-warn' ) )
1871                         );
1872                 }
1873         }
1874
1875         /**
1876          * Attempt to show a custom editing introduction, if supplied
1877          *
1878          * @return bool
1879          */
1880         protected function showCustomIntro() {
1881                 if ( $this->editintro ) {
1882                         $title = Title::newFromText( $this->editintro );
1883                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
1884                                 global $wgOut;
1885                                 // Added using template syntax, to take <noinclude>'s into account.
1886                                 $wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
1887                                 return true;
1888                         } else {
1889                                 return false;
1890                         }
1891                 } else {
1892                         return false;
1893                 }
1894         }
1895
1896         /**
1897          * Send the edit form and related headers to $wgOut
1898          * @param $formCallback Callback that takes an OutputPage parameter; will be called
1899          *     during form output near the top, for captchas and the like.
1900          */
1901         function showEditForm( $formCallback = null ) {
1902                 global $wgOut, $wgUser;
1903
1904                 wfProfileIn( __METHOD__ );
1905
1906                 # need to parse the preview early so that we know which templates are used,
1907                 # otherwise users with "show preview after edit box" will get a blank list
1908                 # we parse this near the beginning so that setHeaders can do the title
1909                 # setting work instead of leaving it in getPreviewText
1910                 $previewOutput = '';
1911                 if ( $this->formtype == 'preview' ) {
1912                         $previewOutput = $this->getPreviewText();
1913                 }
1914
1915                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
1916
1917                 $this->setHeaders();
1918
1919                 if ( $this->showHeader() === false ) {
1920                         wfProfileOut( __METHOD__ );
1921                         return;
1922                 }
1923
1924                 $wgOut->addHTML( $this->editFormPageTop );
1925
1926                 if ( $wgUser->getOption( 'previewontop' ) ) {
1927                         $this->displayPreviewArea( $previewOutput, true );
1928                 }
1929
1930                 $wgOut->addHTML( $this->editFormTextTop );
1931
1932                 $showToolbar = true;
1933                 if ( $this->wasDeletedSinceLastEdit() ) {
1934                         if ( $this->formtype == 'save' ) {
1935                                 // Hide the toolbar and edit area, user can click preview to get it back
1936                                 // Add an confirmation checkbox and explanation.
1937                                 $showToolbar = false;
1938                         } else {
1939                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
1940                                         'deletedwhileediting' );
1941                         }
1942                 }
1943
1944                 #FIXME: add EditForm plugin interface and use it here! #FIXME: search for textarea1 and textares2, and allow EditForm to override all uses.
1945                 $wgOut->addHTML( Html::openElement( 'form', array( 'id' => self::EDITFORM_ID, 'name' => self::EDITFORM_ID,
1946                         'method' => 'post', 'action' => $this->getActionURL( $this->getContextTitle() ),
1947                         'enctype' => 'multipart/form-data' ) ) );
1948
1949                 if ( is_callable( $formCallback ) ) {
1950                         call_user_func_array( $formCallback, array( &$wgOut ) );
1951                 }
1952
1953                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1954
1955                 // Put these up at the top to ensure they aren't lost on early form submission
1956                 $this->showFormBeforeText();
1957
1958                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
1959                         $username = $this->lastDelete->user_name;
1960                         $comment = $this->lastDelete->log_comment;
1961
1962                         // It is better to not parse the comment at all than to have templates expanded in the middle
1963                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
1964                         $key = $comment === ''
1965                                 ? 'confirmrecreate-noreason'
1966                                 : 'confirmrecreate';
1967                         $wgOut->addHTML(
1968                                 '<div class="mw-confirm-recreate">' .
1969                                 wfMsgExt( $key, 'parseinline', $username, "<nowiki>$comment</nowiki>" ) .
1970                                 Xml::checkLabel( wfMsg( 'recreate' ), 'wpRecreate', 'wpRecreate', false,
1971                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
1972                                 ) .
1973                                 '</div>'
1974                         );
1975                 }
1976
1977                 # When the summary is hidden, also hide them on preview/show changes
1978                 if( $this->nosummary ) {
1979                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
1980                 }
1981
1982                 # If a blank edit summary was previously provided, and the appropriate
1983                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1984                 # user being bounced back more than once in the event that a summary
1985                 # is not required.
1986                 #####
1987                 # For a bit more sophisticated detection of blank summaries, hash the
1988                 # automatic one and pass that in the hidden field wpAutoSummary.
1989                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
1990                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
1991                 }
1992
1993                 if ( $this->hasPresetSummary ) {
1994                         // If a summary has been preset using &summary= we dont want to prompt for
1995                         // a different summary. Only prompt for a summary if the summary is blanked.
1996                         // (Bug 17416)
1997                         $this->autoSumm = md5( '' );
1998                 }
1999
2000                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2001                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2002
2003                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2004
2005                 $wgOut->addHTML( Html::hidden( 'format', $this->content_format ) );
2006                 $wgOut->addHTML( Html::hidden( 'model', $this->content_model ) );
2007
2008                 if ( $this->section == 'new' ) {
2009                         $this->showSummaryInput( true, $this->summary );
2010                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2011                 }
2012
2013                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2014
2015                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2016                         $wgOut->addHTML( EditPage::getEditToolbar() );
2017                 }
2018
2019                 if ( $this->isConflict ) {
2020                         // In an edit conflict bypass the overrideable content form method
2021                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2022                         // resolved between page source edits and custom ui edits using the
2023                         // custom edit ui.
2024                         $this->textbox2 = $this->textbox1;
2025
2026                         $content = $this->getCurrentContent();
2027                         $this->textbox1 = $content->serialize( $this->content_format );
2028
2029                         $this->showTextbox1();
2030                 } else {
2031                         $this->showContentForm();
2032                 }
2033
2034                 $wgOut->addHTML( $this->editFormTextAfterContent );
2035
2036                 $wgOut->addWikiText( $this->getCopywarn() );
2037
2038                 $wgOut->addHTML( $this->editFormTextAfterWarn );
2039
2040                 $this->showStandardInputs();
2041
2042                 $this->showFormAfterText();
2043
2044                 $this->showTosSummary();
2045
2046                 $this->showEditTools();
2047
2048                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2049
2050                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2051                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2052
2053                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2054                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2055
2056                 if ( $this->isConflict ) {
2057                         $this->showConflict();
2058                 }
2059
2060                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2061
2062                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2063                         $this->displayPreviewArea( $previewOutput, false );
2064                 }
2065
2066                 wfProfileOut( __METHOD__ );
2067         }
2068
2069         /**
2070          * Extract the section title from current section text, if any.
2071          *
2072          * @param string $text
2073          * @return Mixed|string or false
2074          */
2075         public static function extractSectionTitle( $text ) {
2076                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2077                 if ( !empty( $matches[2] ) ) {
2078                         global $wgParser;
2079                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2080                 } else {
2081                         return false;
2082                 }
2083         }
2084
2085         protected function showHeader() {
2086                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2087
2088                 if ( $this->mTitle->isTalkPage() ) {
2089                         $wgOut->addWikiMsg( 'talkpagetext' );
2090                 }
2091
2092                 # Optional notices on a per-namespace and per-page basis
2093                 $editnotice_ns = 'editnotice-' . $this->mTitle->getNamespace();
2094                 $editnotice_ns_message = wfMessage( $editnotice_ns );
2095                 if ( $editnotice_ns_message->exists() ) {
2096                         $wgOut->addWikiText( $editnotice_ns_message->plain() );
2097                 }
2098                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
2099                         $parts = explode( '/', $this->mTitle->getDBkey() );
2100                         $editnotice_base = $editnotice_ns;
2101                         while ( count( $parts ) > 0 ) {
2102                                 $editnotice_base .= '-' . array_shift( $parts );
2103                                 $editnotice_base_msg = wfMessage( $editnotice_base );
2104                                 if ( $editnotice_base_msg->exists() ) {
2105                                         $wgOut->addWikiText( $editnotice_base_msg->plain() );
2106                                 }
2107                         }
2108                 } else {
2109                         # Even if there are no subpages in namespace, we still don't want / in MW ns.
2110                         $editnoticeText = $editnotice_ns . '-' . str_replace( '/', '-', $this->mTitle->getDBkey() );
2111                         $editnoticeMsg = wfMessage( $editnoticeText );
2112                         if ( $editnoticeMsg->exists() ) {
2113                                 $wgOut->addWikiText( $editnoticeMsg->plain() );
2114                         }
2115                 }
2116
2117                 if ( $this->isConflict ) {
2118                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2119                         $this->edittime = $this->mArticle->getTimestamp();
2120                 } else {
2121                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2122                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2123                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2124                                 // Someone is welcome to try refactoring though
2125                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2126                                 return false;
2127                         }
2128
2129                         if ( $this->section != '' && $this->section != 'new' ) {
2130                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2131                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 );
2132                                         if ( $sectionTitle !== false ) {
2133                                                 $this->summary = "/* $sectionTitle */ ";
2134                                         }
2135                                 }
2136                         }
2137
2138                         if ( $this->missingComment ) {
2139                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2140                         }
2141
2142                         if ( $this->missingSummary && $this->section != 'new' ) {
2143                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2144                         }
2145
2146                         if ( $this->missingSummary && $this->section == 'new' ) {
2147                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2148                         }
2149
2150                         if ( $this->hookError !== '' ) {
2151                                 $wgOut->addWikiText( $this->hookError );
2152                         }
2153
2154                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2155                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2156                         }
2157
2158                         if ( $this->section != 'new' ) {
2159                                 $revision = $this->mArticle->getRevisionFetched();
2160                                 if ( $revision ) {
2161                                         // Let sysop know that this will make private content public if saved
2162
2163                                         if ( !$revision->userCan( Revision::DELETED_TEXT ) ) {
2164                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
2165                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2166                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
2167                                         }
2168
2169                                         if ( !$revision->isCurrent() ) {
2170                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2171                                                 $wgOut->addWikiMsg( 'editingold' );
2172                                         }
2173                                 } elseif ( $this->mTitle->exists() ) {
2174                                         // Something went wrong
2175
2176                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2177                                                 array( 'missing-article', $this->mTitle->getPrefixedText(),
2178                                                 wfMsgNoTrans( 'missingarticle-rev', $this->oldid ) ) );
2179                                 }
2180                         }
2181                 }
2182
2183                 if ( wfReadOnly() ) {
2184                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
2185                 } elseif ( $wgUser->isAnon() ) {
2186                         if ( $this->formtype != 'preview' ) {
2187                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
2188                         } else {
2189                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
2190                         }
2191                 } else {
2192                         if ( $this->isCssJsSubpage ) {
2193                                 # Check the skin exists
2194                                 if ( $this->isWrongCaseCssJsPage ) {
2195                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
2196                                 }
2197                                 if ( $this->formtype !== 'preview' ) {
2198                                         if ( $this->isCssSubpage )
2199                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
2200                                         if ( $this->isJsSubpage )
2201                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
2202                                 }
2203                         }
2204                 }
2205
2206                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2207                         # Is the title semi-protected?
2208                         if ( $this->mTitle->isSemiProtected() ) {
2209                                 $noticeMsg = 'semiprotectedpagewarning';
2210                         } else {
2211                                 # Then it must be protected based on static groups (regular)
2212                                 $noticeMsg = 'protectedpagewarning';
2213                         }
2214                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2215                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2216                 }
2217                 if ( $this->mTitle->isCascadeProtected() ) {
2218                         # Is this page under cascading protection from some source pages?
2219                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2220                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2221                         $cascadeSourcesCount = count( $cascadeSources );
2222                         if ( $cascadeSourcesCount > 0 ) {
2223                                 # Explain, and list the titles responsible
2224                                 foreach ( $cascadeSources as $page ) {
2225                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2226                                 }
2227                         }
2228                         $notice .= '</div>';
2229                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2230                 }
2231                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2232                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2233                                 array( 'lim' => 1,
2234                                         'showIfEmpty' => false,
2235                                         'msgKey' => array( 'titleprotectedwarning' ),
2236                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2237                 }
2238
2239                 if ( $this->kblength === false ) {
2240                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2241                 }
2242
2243                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2244                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2245                                 array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
2246                 } else {
2247                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2248                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2249                                         array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
2250                                 );
2251                         }
2252                 }
2253         }
2254
2255         /**
2256          * Standard summary input and label (wgSummary), abstracted so EditPage
2257          * subclasses may reorganize the form.
2258          * Note that you do not need to worry about the label's for=, it will be
2259          * inferred by the id given to the input. You can remove them both by
2260          * passing array( 'id' => false ) to $userInputAttrs.
2261          *
2262          * @param $summary string The value of the summary input
2263          * @param $labelText string The html to place inside the label
2264          * @param $inputAttrs array of attrs to use on the input
2265          * @param $spanLabelAttrs array of attrs to use on the span inside the label
2266          *
2267          * @return array An array in the format array( $label, $input )
2268          */
2269         function getSummaryInput( $summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null ) {
2270                 // Note: the maxlength is overriden in JS to 250 and to make it use UTF-8 bytes, not characters.
2271                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2272                         'id' => 'wpSummary',
2273                         'maxlength' => '200',
2274                         'tabindex' => '1',
2275                         'size' => 60,
2276                         'spellcheck' => 'true',
2277                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2278
2279                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2280                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2281                         'id' => "wpSummaryLabel"
2282                 );
2283
2284                 $label = null;
2285                 if ( $labelText ) {
2286                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
2287                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2288                 }
2289
2290                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2291
2292                 return array( $label, $input );
2293         }
2294
2295         /**
2296          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2297          *                          up top, or false if this is the comment summary
2298          *                          down below the textarea
2299          * @param $summary String: The text of the summary to display
2300          * @return String
2301          */
2302         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2303                 global $wgOut, $wgContLang;
2304                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2305                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2306                 if ( $isSubjectPreview ) {
2307                         if ( $this->nosummary ) {
2308                                 return;
2309                         }
2310                 } else {
2311                         if ( !$this->mShowSummaryField ) {
2312                                 return;
2313                         }
2314                 }
2315                 $summary = $wgContLang->recodeForEdit( $summary );
2316                 $labelText = wfMsgExt( $isSubjectPreview ? 'subject' : 'summary', 'parseinline' );
2317                 list( $label, $input ) = $this->getSummaryInput( $summary, $labelText, array( 'class' => $summaryClass ), array() );
2318                 $wgOut->addHTML( "{$label} {$input}" );
2319         }
2320
2321         /**
2322          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2323          *                          up top, or false if this is the comment summary
2324          *                          down below the textarea
2325          * @param $summary String: the text of the summary to display
2326          * @return String
2327          */
2328         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2329                 if ( !$summary || ( !$this->preview && !$this->diff ) )
2330                         return "";
2331
2332                 global $wgParser;
2333
2334                 if ( $isSubjectPreview )
2335                         $summary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $summary ) );
2336
2337                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2338
2339                 $summary = wfMsgExt( $message, 'parseinline' ) . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2340                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2341         }
2342
2343         protected function showFormBeforeText() {
2344                 global $wgOut;
2345                 $section = htmlspecialchars( $this->section );
2346                 $wgOut->addHTML( <<<HTML
2347 <input type='hidden' value="{$section}" name="wpSection" />
2348 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2349 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2350 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2351
2352 HTML
2353                 );
2354                 if ( !$this->checkUnicodeCompliantBrowser() )
2355                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2356         }
2357
2358         protected function showFormAfterText() {
2359                 global $wgOut, $wgUser;
2360                 /**
2361                  * To make it harder for someone to slip a user a page
2362                  * which submits an edit form to the wiki without their
2363                  * knowledge, a random token is associated with the login
2364                  * session. If it's not passed back with the submission,
2365                  * we won't save the page, or render user JavaScript and
2366                  * CSS previews.
2367                  *
2368                  * For anon editors, who may not have a session, we just
2369                  * include the constant suffix to prevent editing from
2370                  * broken text-mangling proxies.
2371                  */
2372                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2373         }
2374
2375         /**
2376          * Subpage overridable method for printing the form for page content editing
2377          * By default this simply outputs wpTextbox1
2378          * Subclasses can override this to provide a custom UI for editing;
2379          * be it a form, or simply wpTextbox1 with a modified content that will be
2380          * reverse modified when extracted from the post data.
2381          * Note that this is basically the inverse for importContentFormData
2382          */
2383         protected function showContentForm() {
2384                 $this->showTextbox1();
2385         }
2386
2387         /**
2388          * Method to output wpTextbox1
2389          * The $textoverride method can be used by subclasses overriding showContentForm
2390          * to pass back to this method.
2391          *
2392          * @param $customAttribs array of html attributes to use in the textarea
2393          * @param $textoverride String: optional text to override $this->textarea1 with
2394          */
2395         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2396                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2397                         $attribs = array( 'style' => 'display:none;' );
2398                 } else {
2399                         $classes = array(); // Textarea CSS
2400                         if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2401                                 # Is the title semi-protected?
2402                                 if ( $this->mTitle->isSemiProtected() ) {
2403                                         $classes[] = 'mw-textarea-sprotected';
2404                                 } else {
2405                                         # Then it must be protected based on static groups (regular)
2406                                         $classes[] = 'mw-textarea-protected';
2407                                 }
2408                                 # Is the title cascade-protected?
2409                                 if ( $this->mTitle->isCascadeProtected() ) {
2410                                         $classes[] = 'mw-textarea-cprotected';
2411                                 }
2412                         }
2413
2414                         $attribs = array( 'tabindex' => 1 );
2415
2416                         if ( is_array( $customAttribs ) ) {
2417                                 $attribs += $customAttribs;
2418                         }
2419
2420                         if ( count( $classes ) ) {
2421                                 if ( isset( $attribs['class'] ) ) {
2422                                         $classes[] = $attribs['class'];
2423                                 }
2424                                 $attribs['class'] = implode( ' ', $classes );
2425                         }
2426                 }
2427
2428                 $this->showTextbox( $textoverride !== null ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
2429         }
2430
2431         protected function showTextbox2() {
2432                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2433         }
2434
2435         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2436                 global $wgOut, $wgUser;
2437
2438                 $wikitext = $this->safeUnicodeOutput( $text );
2439                 if ( strval( $wikitext ) !== '' ) {
2440                         // Ensure there's a newline at the end, otherwise adding lines
2441                         // is awkward.
2442                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2443                         // mode will show an extra newline. A bit annoying.
2444                         $wikitext .= "\n";
2445                 }
2446
2447                 $attribs = $customAttribs + array(
2448                         'accesskey' => ',',
2449                         'id'   => $name,
2450                         'cols' => $wgUser->getIntOption( 'cols' ),
2451                         'rows' => $wgUser->getIntOption( 'rows' ),
2452                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
2453                 );
2454
2455                 $pageLang = $this->mTitle->getPageLanguage();
2456                 $attribs['lang'] = $pageLang->getCode();
2457                 $attribs['dir'] = $pageLang->getDir();
2458
2459                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2460         }
2461
2462         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2463                 global $wgOut;
2464                 $classes = array();
2465                 if ( $isOnTop )
2466                         $classes[] = 'ontop';
2467
2468                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2469
2470                 if ( $this->formtype != 'preview' )
2471                         $attribs['style'] = 'display: none;';
2472
2473                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2474
2475                 if ( $this->formtype == 'preview' ) {
2476                         $this->showPreview( $previewOutput );
2477                 }
2478
2479                 $wgOut->addHTML( '</div>' );
2480
2481                 if ( $this->formtype == 'diff' ) {
2482                         $this->showDiff();
2483                 }
2484         }
2485
2486         /**
2487          * Append preview output to $wgOut.
2488          * Includes category rendering if this is a category page.
2489          *
2490          * @param $text String: the HTML to be output for the preview.
2491          */
2492         protected function showPreview( $text ) {
2493                 global $wgOut;
2494                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2495                         $this->mArticle->openShowCategory();
2496                 }
2497                 # This hook seems slightly odd here, but makes things more
2498                 # consistent for extensions.
2499                 wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
2500                 $wgOut->addHTML( $text );
2501                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2502                         $this->mArticle->closeShowCategory();
2503                 }
2504         }
2505
2506         /**
2507          * Get a diff between the current contents of the edit box and the
2508          * version of the page we're editing from.
2509          *
2510          * If this is a section edit, we'll replace the section as for final
2511          * save and then make a comparison.
2512          */
2513         function showDiff() {
2514                 global $wgUser, $wgContLang, $wgParser, $wgOut;
2515
2516                 $oldtitlemsg = 'currentrev';
2517                 # if message does not exist, show diff against the preloaded default
2518                 if( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
2519                         $oldtext = $this->mTitle->getDefaultMessageText();
2520                         if( $oldtext !== false ) {
2521                                 $oldtitlemsg = 'defaultmessagetext';
2522                                 $oldContent = ContentHandler::makeContent( $oldtext, $this->mTitle );
2523                         } else {
2524                                 $oldContent = null;
2525                         }
2526                 } else {
2527                         $oldContent = $this->getOriginalContent();
2528                 }
2529
2530                 $textboxContent = ContentHandler::makeContent( $this->textbox1, $this->getTitle(),
2531                                                                                                                 $this->content_model, $this->content_format ); #XXX: handle parse errors ?
2532
2533                 $newContent = $this->mArticle->replaceSectionContent(
2534                                                                                                         $this->section, $textboxContent,
2535                                                                                                         $this->summary, $this->edittime );
2536
2537                 # hanlde legacy text-based hook
2538                 $newtext_orig = $newContent->serialize( $this->content_format );
2539                 $newtext = $newtext_orig; #clone
2540                 wfRunHooks( 'EditPageGetDiffText', array( $this, &$newtext ) );
2541
2542                 if ( $newtext != $newtext_orig ) {
2543                                                 #if the hook changed the text, create a new Content object accordingly.
2544                                                 $newContent = ContentHandler::makeContent( $newtext, $this->getTitle(), $newContent->getModel() ); #XXX: handle parse errors ?
2545                 }
2546
2547                 wfRunHooks( 'EditPageGetDiffContent', array( $this, &$newContent ) );
2548
2549                 $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
2550                 $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
2551
2552                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
2553                         $oldtitle = wfMsgExt( $oldtitlemsg, array( 'parseinline' ) );
2554                         $newtitle = wfMsgExt( 'yourtext', array( 'parseinline' ) );
2555
2556                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
2557                         $de->setContent( $oldContent, $newContent );
2558
2559                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2560                         $de->showDiffStyle();
2561                 } else {
2562                         $difftext = '';
2563                 }
2564
2565                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2566         }
2567
2568         /**
2569          * Give a chance for site and per-namespace customizations of
2570          * terms of service summary link that might exist separately
2571          * from the copyright notice.
2572          *
2573          * This will display between the save button and the edit tools,
2574          * so should remain short!
2575          */
2576         protected function showTosSummary() {
2577                 $msg = 'editpage-tos-summary';
2578                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
2579                 if ( !wfMessage( $msg )->isDisabled() ) {
2580                         global $wgOut;
2581                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
2582                         $wgOut->addWikiMsg( $msg );
2583                         $wgOut->addHTML( '</div>' );
2584                 }
2585         }
2586
2587         protected function showEditTools() {
2588                 global $wgOut;
2589                 $wgOut->addHTML( '<div class="mw-editTools">' .
2590                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
2591                         '</div>' );
2592         }
2593
2594         protected function getCopywarn() {
2595                 global $wgRightsText;
2596                 if ( $wgRightsText ) {
2597                         $copywarnMsg = array( 'copyrightwarning',
2598                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
2599                                 $wgRightsText );
2600                 } else {
2601                         $copywarnMsg = array( 'copyrightwarning2',
2602                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
2603                 }
2604                 // Allow for site and per-namespace customization of contribution/copyright notice.
2605                 wfRunHooks( 'EditPageCopyrightWarning', array( $this->mTitle, &$copywarnMsg ) );
2606
2607                 return "<div id=\"editpage-copywarn\">\n" .
2608                         call_user_func_array( "wfMsgNoTrans", $copywarnMsg ) . "\n</div>";
2609         }
2610
2611         protected function showStandardInputs( &$tabindex = 2 ) {
2612                 global $wgOut;
2613                 $wgOut->addHTML( "<div class='editOptions'>\n" );
2614
2615                 if ( $this->section != 'new' ) {
2616                         $this->showSummaryInput( false, $this->summary );
2617                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
2618                 }
2619
2620                 $checkboxes = $this->getCheckboxes( $tabindex,
2621                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
2622                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
2623                 $wgOut->addHTML( "<div class='editButtons'>\n" );
2624                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
2625
2626                 $cancel = $this->getCancelLink();
2627                 if ( $cancel !== '' ) {
2628                         $cancel .= wfMsgExt( 'pipe-separator' , 'escapenoentities' );
2629                 }
2630                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ) );
2631                 $edithelp = '<a target="helpwindow" href="' . $edithelpurl . '">' .
2632                         htmlspecialchars( wfMsg( 'edithelp' ) ) . '</a> ' .
2633                         htmlspecialchars( wfMsg( 'newwindow' ) );
2634                 $wgOut->addHTML( "      <span class='editHelp'>{$cancel}{$edithelp}</span>\n" );
2635                 $wgOut->addHTML( "</div><!-- editButtons -->\n</div><!-- editOptions -->\n" );
2636         }
2637
2638         /**
2639          * Show an edit conflict. textbox1 is already shown in showEditForm().
2640          * If you want to use another entry point to this function, be careful.
2641          */
2642         protected function showConflict() {
2643                 global $wgOut;
2644
2645                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
2646                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2647
2648                         $content1 = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format ); #XXX: handle parse errors?
2649                         $content2 = ContentHandler::makeContent( $this->textbox2, $this->getTitle(), $this->content_model, $this->content_format ); #XXX: handle parse errors?
2650
2651                         $handler = ContentHandler::getForModelID( $this->content_model );
2652                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
2653                         $de->setContent( $content2, $content1 );
2654                         $de->showDiff( wfMsgExt( 'yourtext', 'parseinline' ), wfMsg( 'storedversion' ) );
2655
2656                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2657                         $this->showTextbox2();
2658                 }
2659         }
2660
2661         /**
2662          * @return string
2663          */
2664         public function getCancelLink() {
2665                 $cancelParams = array();
2666                 if ( !$this->isConflict && $this->oldid > 0 ) {
2667                         $cancelParams['oldid'] = $this->oldid;
2668                 }
2669
2670                 return Linker::linkKnown(
2671                         $this->getContextTitle(),
2672                         wfMsgExt( 'cancel', array( 'parseinline' ) ),
2673                         array( 'id' => 'mw-editform-cancel' ),
2674                         $cancelParams
2675                 );
2676         }
2677
2678         /**
2679          * Returns the URL to use in the form's action attribute.
2680          * This is used by EditPage subclasses when simply customizing the action
2681          * variable in the constructor is not enough. This can be used when the
2682          * EditPage lives inside of a Special page rather than a custom page action.
2683          *
2684          * @param $title Title object for which is being edited (where we go to for &action= links)
2685          * @return string
2686          */
2687         protected function getActionURL( Title $title ) {
2688                 return $title->getLocalURL( array( 'action' => $this->action ) );
2689         }
2690
2691         /**
2692          * Check if a page was deleted while the user was editing it, before submit.
2693          * Note that we rely on the logging table, which hasn't been always there,
2694          * but that doesn't matter, because this only applies to brand new
2695          * deletes.
2696          */
2697         protected function wasDeletedSinceLastEdit() {
2698                 if ( $this->deletedSinceEdit !== null ) {
2699                         return $this->deletedSinceEdit;
2700                 }
2701
2702                 $this->deletedSinceEdit = false;
2703
2704                 if ( $this->mTitle->isDeletedQuick() ) {
2705                         $this->lastDelete = $this->getLastDelete();
2706                         if ( $this->lastDelete ) {
2707                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
2708                                 if ( $deleteTime > $this->starttime ) {
2709                                         $this->deletedSinceEdit = true;
2710                                 }
2711                         }
2712                 }
2713
2714                 return $this->deletedSinceEdit;
2715         }
2716
2717         protected function getLastDelete() {
2718                 $dbr = wfGetDB( DB_SLAVE );
2719                 $data = $dbr->selectRow(
2720                         array( 'logging', 'user' ),
2721                         array( 'log_type',
2722                                    'log_action',
2723                                    'log_timestamp',
2724                                    'log_user',
2725                                    'log_namespace',
2726                                    'log_title',
2727                                    'log_comment',
2728                                    'log_params',
2729                                    'log_deleted',
2730                                    'user_name' ),
2731                         array( 'log_namespace' => $this->mTitle->getNamespace(),
2732                                    'log_title' => $this->mTitle->getDBkey(),
2733                                    'log_type' => 'delete',
2734                                    'log_action' => 'delete',
2735                                    'user_id=log_user' ),
2736                         __METHOD__,
2737                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
2738                 );
2739                 // Quick paranoid permission checks...
2740                 if ( is_object( $data ) ) {
2741                         if ( $data->log_deleted & LogPage::DELETED_USER )
2742                                 $data->user_name = wfMsgHtml( 'rev-deleted-user' );
2743                         if ( $data->log_deleted & LogPage::DELETED_COMMENT )
2744                                 $data->log_comment = wfMsgHtml( 'rev-deleted-comment' );
2745                 }
2746                 return $data;
2747         }
2748
2749         /**
2750          * Get the rendered text for previewing.
2751          * @return string
2752          */
2753         function getPreviewText() {
2754                 global $wgOut, $wgUser, $wgParser, $wgRawHtml, $wgLang;
2755
2756                 wfProfileIn( __METHOD__ );
2757
2758                 if ( $wgRawHtml && !$this->mTokenOk ) {
2759                         // Could be an offsite preview attempt. This is very unsafe if
2760                         // HTML is enabled, as it could be an attack.
2761                         $parsedNote = '';
2762                         if ( $this->textbox1 !== '' ) {
2763                                 // Do not put big scary notice, if previewing the empty
2764                                 // string, which happens when you initially edit
2765                                 // a category page, due to automatic preview-on-open.
2766                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
2767                                         wfMsg( 'session_fail_preview_html' ) . "</div>", true, /* interface */true );
2768                         }
2769                         wfProfileOut( __METHOD__ );
2770                         return $parsedNote;
2771                 }
2772
2773                 $note = '';
2774
2775                 try {
2776                         $content = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format );
2777
2778                         if ( $this->mTriedSave && !$this->mTokenOk ) {
2779                                 if ( $this->mTokenOkExceptSuffix ) {
2780                                         $note = wfMsg( 'token_suffix_mismatch' );
2781                                 } else {
2782                                         $note = wfMsg( 'session_fail_preview' );
2783                                 }
2784                         } elseif ( $this->incompleteForm ) {
2785                                 $note = wfMsg( 'edit_form_incomplete' );
2786                         } else {
2787                                 $note = wfMsg( 'previewnote' ) .
2788                                         ' [[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' . wfMsg( 'continue-editing' ) . ']]';
2789                         }
2790
2791                         $parserOptions = ParserOptions::newFromUser( $wgUser );
2792                         $parserOptions->setEditSection( false );
2793                         $parserOptions->setTidy( true );
2794                         $parserOptions->setIsPreview( true );
2795                         $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
2796
2797                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
2798                                 # don't parse non-wikitext pages, show message about preview
2799                                 if( $this->mTitle->isCssJsSubpage() ) {
2800                                         $level = 'user';
2801                                 } elseif( $this->mTitle->isCssOrJsPage() ) {
2802                                         $level = 'site';
2803                                 } else {
2804                                         $level = false;
2805                                 }
2806
2807                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
2808                                         $format = 'css';
2809                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
2810                                         $format = 'js';
2811                                 } else {
2812                                         $format = false;
2813                                 }
2814
2815                                 # Used messages to make sure grep find them:
2816                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
2817                                 if( $level && $format ) {
2818                                         $note = "<div id='mw-{$level}{$format}preview'>" . wfMsg( "{$level}{$format}preview" ) . "</div>";
2819                                 } else {
2820                                         $note = wfMsg( 'previewnote' );
2821                                 }
2822                         } else {
2823                                 $note = wfMsg( 'previewnote' );
2824                         }
2825
2826                         $rt = $content->getRedirectChain();
2827
2828                         if ( $rt ) {
2829                                 $previewHTML = $this->mArticle->viewRedirect( $rt, false );
2830                         } else {
2831
2832                                 # If we're adding a comment, we need to show the
2833                                 # summary as the headline
2834                                 if ( $this->section == "new" && $this->summary != "" ) {
2835                                         $content = $content->addSectionHeader( $this->summary );
2836                                 }
2837
2838                                 $toparse_orig = $content->serialize( $this->content_format );
2839                                 $toparse = $toparse_orig;
2840                                 wfRunHooks( 'EditPageGetPreviewText', array( $this, &$toparse ) );
2841
2842                                 if ( $toparse !== $toparse_orig ) {
2843                                         #hook changed the text, create new Content object
2844                                         $content = ContentHandler::makeContent( $toparse, $this->getTitle(), $this->content_model, $this->content_format );
2845                                 }
2846
2847                                 wfRunHooks( 'EditPageGetPreviewContent', array( $this, &$content ) );
2848
2849                                 $parserOptions->enableLimitReport();
2850
2851                                 #XXX: For CSS/JS pages, we should have called the ShowRawCssJs hook here. But it's now deprecated, so never mind
2852                                 $content = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
2853
2854                                 // TODO: might be a saner way to get a meaningfull context here?
2855                                 $parserOutput = $content->getParserOutput( $this->getArticle()->getTitle(), null, $parserOptions );
2856
2857                                 $previewHTML = $parserOutput->getText();
2858                                 $this->mParserOutput = $parserOutput;
2859                                 $wgOut->addParserOutputNoText( $parserOutput );
2860
2861                                 if ( count( $parserOutput->getWarnings() ) ) {
2862                                         $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
2863                                 }
2864                         }
2865                 } catch (MWContentSerializationException $ex) {
2866                         $note .= "\n\n" . wfMsg('content-failed-to-parse', $this->content_model, $this->content_format, $ex->getMessage() );
2867                         $previewHTML = '';
2868                 }
2869
2870                 if ( $this->isConflict ) {
2871                         $conflict = '<h2 id="mw-previewconflict">' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
2872                 } else {
2873                         $conflict = '<hr />';
2874                 }
2875
2876                 $previewhead = "<div class='previewnote'>\n" .
2877                         '<h2 id="mw-previewheader">' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>" .
2878                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
2879
2880                 $pageLang = $this->mTitle->getPageLanguage();
2881                 $attribs = array( 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
2882                         'class' => 'mw-content-' . $pageLang->getDir() );
2883                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
2884
2885                 wfProfileOut( __METHOD__ );
2886                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
2887         }
2888
2889         /**
2890          * @return Array
2891          */
2892         function getTemplates() {
2893                 if ( $this->preview || $this->section != '' ) {
2894                         $templates = array();
2895                         if ( !isset( $this->mParserOutput ) ) {
2896                                 return $templates;
2897                         }
2898                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
2899                                 foreach ( array_keys( $template ) as $dbk ) {
2900                                         $templates[] = Title::makeTitle( $ns, $dbk );
2901                                 }
2902                         }
2903                         return $templates;
2904                 } else {
2905                         return $this->mTitle->getTemplateLinksFrom();
2906                 }
2907         }
2908
2909         /**
2910          * Shows a bulletin board style toolbar for common editing functions.
2911          * It can be disabled in the user preferences.
2912          * The necessary JavaScript code can be found in skins/common/edit.js.
2913          *
2914          * @return string
2915          */
2916         static function getEditToolbar() {
2917                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
2918                 global $wgUseTeX, $wgEnableUploads, $wgForeignFileRepos;
2919
2920                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
2921
2922                 /**
2923                  * $toolarray is an array of arrays each of which includes the
2924                  * filename of the button image (without path), the opening
2925                  * tag, the closing tag, optionally a sample text that is
2926                  * inserted between the two when no selection is highlighted
2927                  * and.  The tip text is shown when the user moves the mouse
2928                  * over the button.
2929                  *
2930                  * Also here: accesskeys (key), which are not used yet until
2931                  * someone can figure out a way to make them work in
2932                  * IE. However, we should make sure these keys are not defined
2933                  * on the edit page.
2934                  */
2935                 $toolarray = array(
2936                         array(
2937                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
2938                                 'id'     => 'mw-editbutton-bold',
2939                                 'open'   => '\'\'\'',
2940                                 'close'  => '\'\'\'',
2941                                 'sample' => wfMsg( 'bold_sample' ),
2942                                 'tip'    => wfMsg( 'bold_tip' ),
2943                                 'key'    => 'B'
2944                         ),
2945                         array(
2946                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
2947                                 'id'     => 'mw-editbutton-italic',
2948                                 'open'   => '\'\'',
2949                                 'close'  => '\'\'',
2950                                 'sample' => wfMsg( 'italic_sample' ),
2951                                 'tip'    => wfMsg( 'italic_tip' ),
2952                                 'key'    => 'I'
2953                         ),
2954                         array(
2955                                 'image'  => $wgLang->getImageFile( 'button-link' ),
2956                                 'id'     => 'mw-editbutton-link',
2957                                 'open'   => '[[',
2958                                 'close'  => ']]',
2959                                 'sample' => wfMsg( 'link_sample' ),
2960                                 'tip'    => wfMsg( 'link_tip' ),
2961                                 'key'    => 'L'
2962                         ),
2963                         array(
2964                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
2965                                 'id'     => 'mw-editbutton-extlink',
2966                                 'open'   => '[',
2967                                 'close'  => ']',
2968                                 'sample' => wfMsg( 'extlink_sample' ),
2969                                 'tip'    => wfMsg( 'extlink_tip' ),
2970                                 'key'    => 'X'
2971                         ),
2972                         array(
2973                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
2974                                 'id'     => 'mw-editbutton-headline',
2975                                 'open'   => "\n== ",
2976                                 'close'  => " ==\n",
2977                                 'sample' => wfMsg( 'headline_sample' ),
2978                                 'tip'    => wfMsg( 'headline_tip' ),
2979                                 'key'    => 'H'
2980                         ),
2981                         $imagesAvailable ? array(
2982                                 'image'  => $wgLang->getImageFile( 'button-image' ),
2983                                 'id'     => 'mw-editbutton-image',
2984                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
2985                                 'close'  => ']]',
2986                                 'sample' => wfMsg( 'image_sample' ),
2987                                 'tip'    => wfMsg( 'image_tip' ),
2988                                 'key'    => 'D',
2989                         ) : false,
2990                         $imagesAvailable ? array(
2991                                 'image'  => $wgLang->getImageFile( 'button-media' ),
2992                                 'id'     => 'mw-editbutton-media',
2993                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
2994                                 'close'  => ']]',
2995                                 'sample' => wfMsg( 'media_sample' ),
2996                                 'tip'    => wfMsg( 'media_tip' ),
2997                                 'key'    => 'M'
2998                         ) : false,
2999                         $wgUseTeX ? array(
3000                                 'image'  => $wgLang->getImageFile( 'button-math' ),
3001                                 'id'     => 'mw-editbutton-math',
3002                                 'open'   => "<math>",
3003                                 'close'  => "</math>",
3004                                 'sample' => wfMsg( 'math_sample' ),
3005                                 'tip'    => wfMsg( 'math_tip' ),
3006                                 'key'    => 'C'
3007                         ) : false,
3008                         array(
3009                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
3010                                 'id'     => 'mw-editbutton-nowiki',
3011                                 'open'   => "<nowiki>",
3012                                 'close'  => "</nowiki>",
3013                                 'sample' => wfMsg( 'nowiki_sample' ),
3014                                 'tip'    => wfMsg( 'nowiki_tip' ),
3015                                 'key'    => 'N'
3016                         ),
3017                         array(
3018                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
3019                                 'id'     => 'mw-editbutton-signature',
3020                                 'open'   => '--~~~~',
3021                                 'close'  => '',
3022                                 'sample' => '',
3023                                 'tip'    => wfMsg( 'sig_tip' ),
3024                                 'key'    => 'Y'
3025                         ),
3026                         array(
3027                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
3028                                 'id'     => 'mw-editbutton-hr',
3029                                 'open'   => "\n----\n",
3030                                 'close'  => '',
3031                                 'sample' => '',
3032                                 'tip'    => wfMsg( 'hr_tip' ),
3033                                 'key'    => 'R'
3034                         )
3035                 );
3036
3037                 $script = 'mw.loader.using("mediawiki.action.edit", function() {';
3038                 foreach ( $toolarray as $tool ) {
3039                         if ( !$tool ) {
3040                                 continue;
3041                         }
3042
3043                         $params = array(
3044                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
3045                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3046                                 // Older browsers show a "speedtip" type message only for ALT.
3047                                 // Ideally these should be different, realistically they
3048                                 // probably don't need to be.
3049                                 $tip = $tool['tip'],
3050                                 $open = $tool['open'],
3051                                 $close = $tool['close'],
3052                                 $sample = $tool['sample'],
3053                                 $cssId = $tool['id'],
3054                         );
3055
3056                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
3057                 }
3058
3059                 // This used to be called on DOMReady from mediawiki.action.edit, which
3060                 // ended up causing race conditions with the setup code above.
3061                 $script .= "\n" .
3062                         "// Create button bar\n" .
3063                         "$(function() { mw.toolbar.init(); } );\n";
3064
3065                 $script .= '});';
3066                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3067
3068                 $toolbar = '<div id="toolbar"></div>';
3069
3070                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3071
3072                 return $toolbar;
3073         }
3074
3075         /**
3076          * Returns an array of html code of the following checkboxes:
3077          * minor and watch
3078          *
3079          * @param $tabindex int Current tabindex
3080          * @param $checked Array of checkbox => bool, where bool indicates the checked
3081          *                 status of the checkbox
3082          *
3083          * @return array
3084          */
3085         public function getCheckboxes( &$tabindex, $checked ) {
3086                 global $wgUser;
3087
3088                 $checkboxes = array();
3089
3090                 // don't show the minor edit checkbox if it's a new page or section
3091                 if ( !$this->isNew ) {
3092                         $checkboxes['minor'] = '';
3093                         $minorLabel = wfMsgExt( 'minoredit', array( 'parseinline' ) );
3094                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3095                                 $attribs = array(
3096                                         'tabindex'  => ++$tabindex,
3097                                         'accesskey' => wfMsg( 'accesskey-minoredit' ),
3098                                         'id'        => 'wpMinoredit',
3099                                 );
3100                                 $checkboxes['minor'] =
3101                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3102                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3103                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3104                                         ">{$minorLabel}</label>";
3105                         }
3106                 }
3107
3108                 $watchLabel = wfMsgExt( 'watchthis', array( 'parseinline' ) );
3109                 $checkboxes['watch'] = '';
3110                 if ( $wgUser->isLoggedIn() ) {
3111                         $attribs = array(
3112                                 'tabindex'  => ++$tabindex,
3113                                 'accesskey' => wfMsg( 'accesskey-watch' ),
3114                                 'id'        => 'wpWatchthis',
3115                         );
3116                         $checkboxes['watch'] =
3117                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3118                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3119                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3120                                 ">{$watchLabel}</label>";
3121                 }
3122                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3123                 return $checkboxes;
3124         }
3125
3126         /**
3127          * Returns an array of html code of the following buttons:
3128          * save, diff, preview and live
3129          *
3130          * @param $tabindex int Current tabindex
3131          *
3132          * @return array
3133          */
3134         public function getEditButtons( &$tabindex ) {
3135                 $buttons = array();
3136
3137                 $temp = array(
3138                         'id'        => 'wpSave',
3139                         'name'      => 'wpSave',
3140                         'type'      => 'submit',
3141                         'tabindex'  => ++$tabindex,
3142                         'value'     => wfMsg( 'savearticle' ),
3143                         'accesskey' => wfMsg( 'accesskey-save' ),
3144                         'title'     => wfMsg( 'tooltip-save' ) . ' [' . wfMsg( 'accesskey-save' ) . ']',
3145                 );
3146                 $buttons['save'] = Xml::element( 'input', $temp, '' );
3147
3148                 ++$tabindex; // use the same for preview and live preview
3149                 $temp = array(
3150                         'id'        => 'wpPreview',
3151                         'name'      => 'wpPreview',
3152                         'type'      => 'submit',
3153                         'tabindex'  => $tabindex,
3154                         'value'     => wfMsg( 'showpreview' ),
3155                         'accesskey' => wfMsg( 'accesskey-preview' ),
3156                         'title'     => wfMsg( 'tooltip-preview' ) . ' [' . wfMsg( 'accesskey-preview' ) . ']',
3157                 );
3158                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
3159                 $buttons['live'] = '';
3160
3161                 $temp = array(
3162                         'id'        => 'wpDiff',
3163                         'name'      => 'wpDiff',
3164                         'type'      => 'submit',
3165                         'tabindex'  => ++$tabindex,
3166                         'value'     => wfMsg( 'showdiff' ),
3167                         'accesskey' => wfMsg( 'accesskey-diff' ),
3168                         'title'     => wfMsg( 'tooltip-diff' ) . ' [' . wfMsg( 'accesskey-diff' ) . ']',
3169                 );
3170                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
3171
3172                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3173                 return $buttons;
3174         }
3175
3176         /**
3177          * Output preview text only. This can be sucked into the edit page
3178          * via JavaScript, and saves the server time rendering the skin as
3179          * well as theoretically being more robust on the client (doesn't
3180          * disturb the edit box's undo history, won't eat your text on
3181          * failure, etc).
3182          *
3183          * @todo This doesn't include category or interlanguage links.
3184          *       Would need to enhance it a bit, <s>maybe wrap them in XML
3185          *       or something...</s> that might also require more skin
3186          *       initialization, so check whether that's a problem.
3187          */
3188         function livePreview() {
3189                 global $wgOut;
3190                 $wgOut->disable();
3191                 header( 'Content-type: text/xml; charset=utf-8' );
3192                 header( 'Cache-control: no-cache' );
3193
3194                 $previewText = $this->getPreviewText();
3195                 #$categories = $skin->getCategoryLinks();
3196
3197                 $s =
3198                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3199                 Xml::tags( 'livepreview', null,
3200                         Xml::element( 'preview', null, $previewText )
3201                         #.      Xml::element( 'category', null, $categories )
3202                 );
3203                 echo $s;
3204         }
3205
3206         /**
3207          * Call the stock "user is blocked" page
3208          *
3209          * @deprecated in 1.19; throw an exception directly instead
3210          */
3211         function blockedPage() {
3212                 wfDeprecated( __METHOD__, '1.19' );
3213                 global $wgUser;
3214
3215                 throw new UserBlockedError( $wgUser->getBlock() );
3216         }
3217
3218         /**
3219          * Produce the stock "please login to edit pages" page
3220          *
3221          * @deprecated in 1.19; throw an exception directly instead
3222          */
3223         function userNotLoggedInPage() {
3224                 wfDeprecated( __METHOD__, '1.19' );
3225                 throw new PermissionsError( 'edit' );
3226         }
3227
3228         /**
3229          * Show an error page saying to the user that he has insufficient permissions
3230          * to create a new page
3231          *
3232          * @deprecated in 1.19; throw an exception directly instead
3233          */
3234         function noCreatePermission() {
3235                 wfDeprecated( __METHOD__, '1.19' );
3236                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
3237                 throw new PermissionsError( $permission );
3238         }
3239
3240         /**
3241          * Creates a basic error page which informs the user that
3242          * they have attempted to edit a nonexistent section.
3243          */
3244         function noSuchSectionPage() {
3245                 global $wgOut;
3246
3247                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3248
3249                 $res = wfMsgExt( 'nosuchsectiontext', 'parse', $this->section );
3250                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
3251                 $wgOut->addHTML( $res );
3252
3253                 $wgOut->returnToMain( false, $this->mTitle );
3254         }
3255
3256         /**
3257          * Produce the stock "your edit contains spam" page
3258          *
3259          * @param $match string Text which triggered one or more filters
3260          * @deprecated since 1.17 Use method spamPageWithContent() instead
3261          */
3262         static function spamPage( $match = false ) {
3263                 wfDeprecated( __METHOD__, '1.17' );
3264
3265                 global $wgOut, $wgTitle;
3266
3267                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3268
3269                 $wgOut->addHTML( '<div id="spamprotected">' );
3270                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3271                 if ( $match ) {
3272                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3273                 }
3274                 $wgOut->addHTML( '</div>' );
3275
3276                 $wgOut->returnToMain( false, $wgTitle );
3277         }
3278
3279         /**
3280          * Show "your edit contains spam" page with your diff and text
3281          *
3282          * @param $match string|Array|bool Text (or array of texts) which triggered one or more filters
3283          */
3284         public function spamPageWithContent( $match = false ) {
3285                 global $wgOut, $wgLang;
3286                 $this->textbox2 = $this->textbox1;
3287
3288                 if( is_array( $match ) ){
3289                         $match = $wgLang->listToText( $match );
3290                 }
3291                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3292
3293                 $wgOut->addHTML( '<div id="spamprotected">' );
3294                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3295                 if ( $match ) {
3296                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3297                 }
3298                 $wgOut->addHTML( '</div>' );
3299
3300                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3301                 $this->showDiff();
3302
3303                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3304                 $this->showTextbox2();
3305
3306                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3307         }
3308
3309         /**
3310          * Format an anchor fragment as it would appear for a given section name
3311          * @param $text String
3312          * @return String
3313          * @private
3314          */
3315         function sectionAnchor( $text ) {
3316                 global $wgParser;
3317                 return $wgParser->guessSectionNameFromWikiText( $text );
3318         }
3319
3320         /**
3321          * Check if the browser is on a blacklist of user-agents known to
3322          * mangle UTF-8 data on form submission. Returns true if Unicode
3323          * should make it through, false if it's known to be a problem.
3324          * @return bool
3325          * @private
3326          */
3327         function checkUnicodeCompliantBrowser() {
3328                 global $wgBrowserBlackList;
3329                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
3330                         // No User-Agent header sent? Trust it by default...
3331                         return true;
3332                 }
3333                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
3334                 foreach ( $wgBrowserBlackList as $browser ) {
3335                         if ( preg_match( $browser, $currentbrowser ) ) {
3336                                 return false;
3337                         }
3338                 }
3339                 return true;
3340         }
3341
3342         /**
3343          * Filter an input field through a Unicode de-armoring process if it
3344          * came from an old browser with known broken Unicode editing issues.
3345          *
3346          * @param $request WebRequest
3347          * @param $field String
3348          * @return String
3349          * @private
3350          */
3351         function safeUnicodeInput( $request, $field ) {
3352                 $text = rtrim( $request->getText( $field ) );
3353                 return $request->getBool( 'safemode' )
3354                         ? $this->unmakesafe( $text )
3355                         : $text;
3356         }
3357
3358         /**
3359          * @param $request WebRequest
3360          * @param $text string
3361          * @return string
3362          */
3363         function safeUnicodeText( $request, $text ) {
3364                 $text = rtrim( $text );
3365                 return $request->getBool( 'safemode' )
3366                         ? $this->unmakesafe( $text )
3367                         : $text;
3368         }
3369
3370         /**
3371          * Filter an output field through a Unicode armoring process if it is
3372          * going to an old browser with known broken Unicode editing issues.
3373          *
3374          * @param $text String
3375          * @return String
3376          * @private
3377          */
3378         function safeUnicodeOutput( $text ) {
3379                 global $wgContLang;
3380                 $codedText = $wgContLang->recodeForEdit( $text );
3381                 return $this->checkUnicodeCompliantBrowser()
3382                         ? $codedText
3383                         : $this->makesafe( $codedText );
3384         }
3385
3386         /**
3387          * A number of web browsers are known to corrupt non-ASCII characters
3388          * in a UTF-8 text editing environment. To protect against this,
3389          * detected browsers will be served an armored version of the text,
3390          * with non-ASCII chars converted to numeric HTML character references.
3391          *
3392          * Preexisting such character references will have a 0 added to them
3393          * to ensure that round-trips do not alter the original data.
3394          *
3395          * @param $invalue String
3396          * @return String
3397          * @private
3398          */
3399         function makesafe( $invalue ) {
3400                 // Armor existing references for reversability.
3401                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
3402
3403                 $bytesleft = 0;
3404                 $result = "";
3405                 $working = 0;
3406                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3407                         $bytevalue = ord( $invalue[$i] );
3408                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
3409                                 $result .= chr( $bytevalue );
3410                                 $bytesleft = 0;
3411                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
3412                                 $working = $working << 6;
3413                                 $working += ( $bytevalue & 0x3F );
3414                                 $bytesleft--;
3415                                 if ( $bytesleft <= 0 ) {
3416                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3417                                 }
3418                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
3419                                 $working = $bytevalue & 0x1F;
3420                                 $bytesleft = 1;
3421                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
3422                                 $working = $bytevalue & 0x0F;
3423                                 $bytesleft = 2;
3424                         } else { // 1111 0xxx
3425                                 $working = $bytevalue & 0x07;
3426                                 $bytesleft = 3;
3427                         }
3428                 }
3429                 return $result;
3430         }
3431
3432         /**
3433          * Reverse the previously applied transliteration of non-ASCII characters
3434          * back to UTF-8. Used to protect data from corruption by broken web browsers
3435          * as listed in $wgBrowserBlackList.
3436          *
3437          * @param $invalue String
3438          * @return String
3439          * @private
3440          */
3441         function unmakesafe( $invalue ) {
3442                 $result = "";
3443                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3444                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
3445                                 $i += 3;
3446                                 $hexstring = "";
3447                                 do {
3448                                         $hexstring .= $invalue[$i];
3449                                         $i++;
3450                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
3451
3452                                 // Do some sanity checks. These aren't needed for reversability,
3453                                 // but should help keep the breakage down if the editor
3454                                 // breaks one of the entities whilst editing.
3455                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) and ( strlen( $hexstring ) <= 6 ) ) {
3456                                         $codepoint = hexdec( $hexstring );
3457                                         $result .= codepointToUtf8( $codepoint );
3458                                 } else {
3459                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
3460                                 }
3461                         } else {
3462                                 $result .= substr( $invalue, $i, 1 );
3463                         }
3464                 }
3465                 // reverse the transform that we made for reversability reasons.
3466                 return strtr( $result, array( "&#x0" => "&#x" ) );
3467         }
3468 }