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                 return false;
1172         }
1173
1174         /**
1175          * Attempt submission (no UI)
1176          *
1177          * @param $result
1178          * @param $bot bool
1179          *
1180          * @return Status object, possibly with a message, but always with one of the AS_* constants in $status->value,
1181          *
1182          * FIXME: This interface is TERRIBLE, but hard to get rid of due to various error display idiosyncrasies. There are
1183          * also lots of cases where error metadata is set in the object and retrieved later instead of being returned, e.g.
1184          * AS_CONTENT_TOO_BIG and AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some time.
1185          */
1186         function internalAttemptSave( &$result, $bot = false ) {
1187                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1188
1189                 $status = Status::newGood();
1190
1191                 wfProfileIn( __METHOD__  );
1192                 wfProfileIn( __METHOD__ . '-checks' );
1193
1194                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
1195                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1196                         $status->fatal( 'hookaborted' );
1197                         $status->value = self::AS_HOOK_ERROR;
1198                         wfProfileOut( __METHOD__ . '-checks' );
1199                         wfProfileOut( __METHOD__  );
1200                         return $status;
1201                 }
1202
1203                 # Check image redirect
1204                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1205                         Title::newFromRedirect( $this->textbox1 ) instanceof Title && #FIXME: use content handler to check for redirect
1206                         !$wgUser->isAllowed( 'upload' ) ) {
1207                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1208                                 $status->setResult( false, $code );
1209
1210                                 wfProfileOut( __METHOD__ . '-checks' );
1211                                 wfProfileOut( __METHOD__  );
1212
1213                                 return $status;
1214                 }
1215
1216                 # Check for spam
1217                 $match = self::matchSummarySpamRegex( $this->summary );
1218                 if ( $match === false ) {
1219                         $match = self::matchSpamRegex( $this->textbox1 );
1220                 }
1221                 if ( $match !== false ) {
1222                         $result['spam'] = $match;
1223                         $ip = $wgRequest->getIP();
1224                         $pdbk = $this->mTitle->getPrefixedDBkey();
1225                         $match = str_replace( "\n", '', $match );
1226                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1227                         $status->fatal( 'spamprotectionmatch', $match );
1228                         $status->value = self::AS_SPAM_ERROR;
1229                         wfProfileOut( __METHOD__ . '-checks' );
1230                         wfProfileOut( __METHOD__ );
1231                         return $status;
1232                 }
1233                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
1234                         # Error messages etc. could be handled within the hook...
1235                         $status->fatal( 'hookaborted' );
1236                         $status->value = self::AS_HOOK_ERROR;
1237                         wfProfileOut( __METHOD__ . '-checks' );
1238                         wfProfileOut( __METHOD__ );
1239                         return $status;
1240                 } elseif ( $this->hookError != '' ) {
1241                         # ...or the hook could be expecting us to produce an error
1242                         $status->fatal( 'hookaborted' );
1243                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1244                         wfProfileOut( __METHOD__ . '-checks' );
1245                         wfProfileOut( __METHOD__ );
1246                         return $status;
1247                 }
1248
1249                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1250                         // Auto-block user's IP if the account was "hard" blocked
1251                         $wgUser->spreadAnyEditBlock();
1252                         # Check block state against master, thus 'false'.
1253                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1254                         wfProfileOut( __METHOD__ . '-checks' );
1255                         wfProfileOut( __METHOD__ );
1256                         return $status;
1257                 }
1258
1259                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1260                 if ( $this->kblength > $wgMaxArticleSize ) {
1261                         // Error will be displayed by showEditForm()
1262                         $this->tooBig = true;
1263                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1264                         wfProfileOut( __METHOD__ . '-checks' );
1265                         wfProfileOut( __METHOD__ );
1266                         return $status;
1267                 }
1268
1269                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1270                         if ( $wgUser->isAnon() ) {
1271                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1272                                 wfProfileOut( __METHOD__ . '-checks' );
1273                                 wfProfileOut( __METHOD__ );
1274                                 return $status;
1275                         } else {
1276                                 $status->fatal( 'readonlytext' );
1277                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1278                                 wfProfileOut( __METHOD__ . '-checks' );
1279                                 wfProfileOut( __METHOD__ );
1280                                 return $status;
1281                         }
1282                 }
1283
1284                 if ( wfReadOnly() ) {
1285                         $status->fatal( 'readonlytext' );
1286                         $status->value = self::AS_READ_ONLY_PAGE;
1287                         wfProfileOut( __METHOD__ . '-checks' );
1288                         wfProfileOut( __METHOD__ );
1289                         return $status;
1290                 }
1291                 if ( $wgUser->pingLimiter() ) {
1292                         $status->fatal( 'actionthrottledtext' );
1293                         $status->value = self::AS_RATE_LIMITED;
1294                         wfProfileOut( __METHOD__ . '-checks' );
1295                         wfProfileOut( __METHOD__ );
1296                         return $status;
1297                 }
1298
1299                 # If the article has been deleted while editing, don't save it without
1300                 # confirmation
1301                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1302                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1303                         wfProfileOut( __METHOD__ . '-checks' );
1304                         wfProfileOut( __METHOD__ );
1305                         return $status;
1306                 }
1307
1308                 wfProfileOut( __METHOD__ . '-checks' );
1309
1310                 // Use SELECT FOR UPDATE here to avoid transaction collision in
1311                 // WikiPage::updateRevisionOn() and ending in the self::AS_END case.
1312                 $this->mArticle->loadPageData( 'forupdate' );
1313                 $new = !$this->mArticle->exists();
1314
1315                 try {
1316                         if ( $new ) {
1317                                 // Late check for create permission, just in case *PARANOIA*
1318                                 if ( !$this->mTitle->userCan( 'create' ) ) {
1319                                         $status->fatal( 'nocreatetext' );
1320                                         $status->value = self::AS_NO_CREATE_PERMISSION;
1321                                         wfDebug( __METHOD__ . ": no create permission\n" );
1322                                         wfProfileOut( __METHOD__ );
1323                                         return $status;
1324                                 }
1325
1326                                 # Don't save a new article if it's blank.
1327                                 if ( $this->textbox1 == '' ) {
1328                                         $status->setResult( false, self::AS_BLANK_ARTICLE );
1329                                         wfProfileOut( __METHOD__ );
1330                                         return $status;
1331                                 }
1332
1333                                 // Run post-section-merge edit filter
1334                                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
1335                                         # Error messages etc. could be handled within the hook...
1336                                         $status->fatal( 'hookaborted' );
1337                                         $status->value = self::AS_HOOK_ERROR;
1338                                         wfProfileOut( __METHOD__ );
1339                                         return $status;
1340                                 } elseif ( $this->hookError != '' ) {
1341                                         # ...or the hook could be expecting us to produce an error
1342                                         $status->fatal( 'hookaborted' );
1343                                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1344                                         wfProfileOut( __METHOD__ );
1345                                         return $status;
1346                                 }
1347
1348                                 $content = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format );
1349
1350                                 $result['sectionanchor'] = '';
1351                                 if ( $this->section == 'new' ) {
1352                                         if ( $this->sectiontitle !== '' ) {
1353                                                 // Insert the section title above the content.
1354                                                 $content = $content->addSectionHeader( $this->sectiontitle );
1355
1356                                                 // Jump to the new section
1357                                                 $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1358
1359                                                 // If no edit summary was specified, create one automatically from the section
1360                                                 // title and have it link to the new section. Otherwise, respect the summary as
1361                                                 // passed.
1362                                                 if ( $this->summary === '' ) {
1363                                                         $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1364                                                         $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSectionTitle );
1365                                                 }
1366                                         } elseif ( $this->summary !== '' ) {
1367                                                 // Insert the section title above the content.
1368                                                 $content = $content->addSectionHeader( $this->sectiontitle );
1369
1370                                                 // Jump to the new section
1371                                                 $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1372
1373                                                 // Create a link to the new section from the edit summary.
1374                                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
1375                                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1376                                         }
1377                                 }
1378
1379                                 $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1380
1381                         } else { # not $new
1382
1383                                 # Article exists. Check for edit conflict.
1384
1385                                 $this->mArticle->clear(); # Force reload of dates, etc.
1386                                 $timestamp = $this->mArticle->getTimestamp();
1387
1388                                 wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1389
1390                                 if ( $timestamp != $this->edittime ) {
1391                                         $this->isConflict = true;
1392                                         if ( $this->section == 'new' ) {
1393                                                 if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1394                                                         $this->mArticle->getComment() == $this->summary ) {
1395                                                         // Probably a duplicate submission of a new comment.
1396                                                         // This can happen when squid resends a request after
1397                                                         // a timeout but the first one actually went through.
1398                                                         wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
1399                                                 } else {
1400                                                         // New comment; suppress conflict.
1401                                                         $this->isConflict = false;
1402                                                         wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1403                                                 }
1404                                         } elseif ( $this->section == '' && $this->userWasLastToEdit( $wgUser->getId(), $this->edittime ) ) {
1405                                                 # Suppress edit conflict with self, except for section edits where merging is required.
1406                                                 wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1407                                                 $this->isConflict = false;
1408                                         }
1409                                 }
1410
1411                                 // If sectiontitle is set, use it, otherwise use the summary as the section title (for
1412                                 // backwards compatibility with old forms/bots).
1413                                 if ( $this->sectiontitle !== '' ) {
1414                                         $sectionTitle = $this->sectiontitle;
1415                                 } else {
1416                                         $sectionTitle = $this->summary;
1417                                 }
1418
1419                                 $textbox_content = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format );
1420                                 $content = null;
1421
1422                                 if ( $this->isConflict ) {
1423                                         wfDebug( __METHOD__ . ": conflict! getting section '$this->section' for time '$this->edittime' (article time '{$timestamp}')\n" );
1424                                         $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle, $this->edittime );
1425                                 } else {
1426                                         wfDebug( __METHOD__ . ": getting section '$this->section'\n" );
1427                                         $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle );
1428                                 }
1429
1430                                 if ( is_null( $content ) ) {
1431                                         wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1432                                         $this->isConflict = true;
1433                                         $content = $textbox_content; // do not try to merge here!
1434                                 } elseif ( $this->isConflict ) {
1435                                         # Attempt merge
1436                                         if ( $this->mergeChangesIntoContent( $textbox_content ) ) {
1437                                                 // Successful merge! Maybe we should tell the user the good news?
1438                                                 $this->isConflict = false;
1439                                                 $content = $textbox_content;
1440                                                 wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1441                                         } else {
1442                                                 $this->section = '';
1443                                                 #$this->textbox1 = $text; #redundant, nothing to do here?
1444                                                 wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1445                                         }
1446                                 }
1447
1448                                 if ( $this->isConflict ) {
1449                                         $status->setResult( false, self::AS_CONFLICT_DETECTED );
1450                                         wfProfileOut( __METHOD__ );
1451                                         return $status;
1452                                 }
1453
1454                                 // Run post-section-merge edit filter
1455                                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $content->serialize( $this->content_format ), &$this->hookError, $this->summary ) )
1456                                                 || !wfRunHooks( 'EditFilterMergedContent', array( $this, $content, &$this->hookError, $this->summary ) ) ) {
1457                                         # Error messages etc. could be handled within the hook...
1458                                         $status->fatal( 'hookaborted' );
1459                                         $status->value = self::AS_HOOK_ERROR;
1460                                         wfProfileOut( __METHOD__ );
1461                                         return $status;
1462                                 } elseif ( $this->hookError != '' ) {
1463                                         # ...or the hook could be expecting us to produce an error
1464                                         $status->fatal( 'hookaborted' );
1465                                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1466                                         wfProfileOut( __METHOD__ );
1467                                         return $status;
1468                                 }
1469
1470                                 $content = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format );
1471
1472                                 # Handle the user preference to force summaries here, but not for null edits
1473                                 if ( $this->section != 'new' && !$this->allowBlankSummary
1474                                         && !$content->equals( $this->getOriginalContent() )
1475                                         && !$content->isRedirect() ) # check if it's not a redirect
1476                                 {
1477                                         if ( md5( $this->summary ) == $this->autoSumm ) {
1478                                                 $this->missingSummary = true;
1479                                                 $status->fatal( 'missingsummary' );
1480                                                 $status->value = self::AS_SUMMARY_NEEDED;
1481                                                 wfProfileOut( __METHOD__ );
1482                                                 return $status;
1483                                         }
1484                                 }
1485
1486                                 # And a similar thing for new sections
1487                                 if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1488                                         if ( trim( $this->summary ) == '' ) {
1489                                                 $this->missingSummary = true;
1490                                                 $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1491                                                 $status->value = self::AS_SUMMARY_NEEDED;
1492                                                 wfProfileOut( __METHOD__ );
1493                                                 return $status;
1494                                         }
1495                                 }
1496
1497                                 # All's well
1498                                 wfProfileIn( __METHOD__ . '-sectionanchor' );
1499                                 $sectionanchor = '';
1500                                 if ( $this->section == 'new' ) {
1501                                         if ( $this->textbox1 == '' ) {
1502                                                 $this->missingComment = true;
1503                                                 $status->fatal( 'missingcommenttext' );
1504                                                 $status->value = self::AS_TEXTBOX_EMPTY;
1505                                                 wfProfileOut( __METHOD__ . '-sectionanchor' );
1506                                                 wfProfileOut( __METHOD__ );
1507                                                 return $status;
1508                                         }
1509                                         if ( $this->sectiontitle !== '' ) {
1510                                                 $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1511                                                 // If no edit summary was specified, create one automatically from the section
1512                                                 // title and have it link to the new section. Otherwise, respect the summary as
1513                                                 // passed.
1514                                                 if ( $this->summary === '' ) {
1515                                                         $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1516                                                         $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSectionTitle );
1517                                                 }
1518                                         } elseif ( $this->summary !== '' ) {
1519                                                 $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1520                                                 # This is a new section, so create a link to the new section
1521                                                 # in the revision summary.
1522                                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
1523                                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1524                                         }
1525                                 } elseif ( $this->section != '' ) {
1526                                         # Try to get a section anchor from the section source, redirect to edited section if header found
1527                                         # XXX: might be better to integrate this into Article::replaceSection
1528                                         # for duplicate heading checking and maybe parsing
1529                                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1530                                         # we can't deal with anchors, includes, html etc in the header for now,
1531                                         # headline would need to be parsed to improve this
1532                                         if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1533                                                 $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1534                                         }
1535                                 }
1536                                 $result['sectionanchor'] = $sectionanchor;
1537                                 wfProfileOut( __METHOD__ . '-sectionanchor' );
1538
1539                                 // Save errors may fall down to the edit form, but we've now
1540                                 // merged the section into full text. Clear the section field
1541                                 // so that later submission of conflict forms won't try to
1542                                 // replace that into a duplicated mess.
1543                                         $this->textbox1 = $content->serialize( $this->content_format );
1544                                 $this->section = '';
1545
1546                                 $status->value = self::AS_SUCCESS_UPDATE;
1547                         }
1548
1549                         // Check for length errors again now that the section is merged in
1550                                 $this->kblength = (int)( strlen( $content->serialize( $this->content_format ) ) / 1024 );
1551                         if ( $this->kblength > $wgMaxArticleSize ) {
1552                                 $this->tooBig = true;
1553                                 $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1554                                 wfProfileOut( __METHOD__ );
1555                                 return $status;
1556                         }
1557
1558                         $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1559                                 ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1560                                 ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1561                                 ( $bot ? EDIT_FORCE_BOT : 0 );
1562
1563                                 $doEditStatus = $this->mArticle->doEditContent( $content, $this->summary, $flags, false, null, $this->content_format );
1564
1565                         if ( $doEditStatus->isOK() ) {
1566                                         $result['redirect'] = $content->isRedirect();
1567                                 $this->commitWatch();
1568                                 wfProfileOut( __METHOD__ );
1569                                 return $status;
1570                         } else {
1571                                 // Failure from doEdit()
1572                                 // Show the edit conflict page for certain recognized errors from doEdit(),
1573                                 // but don't show it for errors from extension hooks
1574                                 $errors = $doEditStatus->getErrorsArray();
1575                                 if ( in_array( $errors[0][0], array( 'edit-gone-missing', 'edit-conflict',
1576                                         'edit-already-exists' ) ) )
1577                                 {
1578                                         $this->isConflict = true;
1579                                         // Destroys data doEdit() put in $status->value but who cares
1580                                         $doEditStatus->value = self::AS_END;
1581                                 }
1582                                 wfProfileOut( __METHOD__ );
1583                                 return $doEditStatus;
1584                         }
1585                 } catch (MWContentSerializationException $ex) {
1586                         $status->fatal( 'content-failed-to-parse', $this->content_model, $this->content_format, $ex->getMessage() );
1587                         $status->value = self::AS_PARSE_ERROR;
1588                         wfProfileOut( __METHOD__ );
1589                         return $status;
1590                 }
1591         }
1592
1593         /**
1594          * Commit the change of watch status
1595          */
1596         protected function commitWatch() {
1597                 global $wgUser;
1598                 if ( $this->watchthis xor $this->mTitle->userIsWatching() ) {
1599                         $dbw = wfGetDB( DB_MASTER );
1600                         $dbw->begin( __METHOD__ );
1601                         if ( $this->watchthis ) {
1602                                 WatchAction::doWatch( $this->mTitle, $wgUser );
1603                         } else {
1604                                 WatchAction::doUnwatch( $this->mTitle, $wgUser );
1605                         }
1606                         $dbw->commit( __METHOD__ );
1607                 }
1608         }
1609
1610         /**
1611          * Check if no edits were made by other users since
1612          * the time a user started editing the page. Limit to
1613          * 50 revisions for the sake of performance.
1614          *
1615          * @param $id int
1616          * @param $edittime string
1617          *
1618          * @return bool
1619          */
1620         protected function userWasLastToEdit( $id, $edittime ) {
1621                 if ( !$id ) return false;
1622                 $dbw = wfGetDB( DB_MASTER );
1623                 $res = $dbw->select( 'revision',
1624                         'rev_user',
1625                         array(
1626                                 'rev_page' => $this->mTitle->getArticleID(),
1627                                 'rev_timestamp > ' . $dbw->addQuotes( $dbw->timestamp( $edittime ) )
1628                         ),
1629                         __METHOD__,
1630                         array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
1631                 foreach ( $res as $row ) {
1632                         if ( $row->rev_user != $id ) {
1633                                 return false;
1634                         }
1635                 }
1636                 return true;
1637         }
1638
1639         /**
1640          * @private
1641          * @todo document
1642          *
1643          * @parma $editText string
1644          *
1645          * @return bool
1646          * @deprecated since 1.WD, use mergeChangesIntoContent() instead
1647          */
1648         function mergeChangesInto( &$editText ){
1649                 wfDebug( __METHOD__, "1.WD" );
1650
1651                 $editContent = ContentHandler::makeContent( $editText, $this->getTitle(), $this->content_model, $this->content_format );
1652
1653                 $ok = $this->mergeChangesIntoContent( $editContent );
1654
1655                 if ( $ok ) {
1656                         $editText = $editContent->serialize( $this->content_format ); #XXX: really serialize?!
1657                         return true;
1658                 } else {
1659                         return false;
1660                 }
1661         }
1662
1663         /**
1664          * @private
1665          * @todo document
1666          *
1667          * @parma $editText string
1668          *
1669          * @return bool
1670          * @since since 1.WD
1671          */
1672         private function mergeChangesIntoContent( &$editContent ){
1673                 wfProfileIn( __METHOD__ );
1674
1675                 $db = wfGetDB( DB_MASTER );
1676
1677                 // This is the revision the editor started from
1678                 $baseRevision = $this->getBaseRevision();
1679                 if ( is_null( $baseRevision ) ) {
1680                         wfProfileOut( __METHOD__ );
1681                         return false;
1682                 }
1683                 $baseContent = $baseRevision->getContent();
1684
1685                 // The current state, we want to merge updates into it
1686                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1687                 if ( is_null( $currentRevision ) ) {
1688                         wfProfileOut( __METHOD__ );
1689                         return false;
1690                 }
1691                 $currentContent = $currentRevision->getContent();
1692
1693                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
1694
1695                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
1696
1697                 if ( $result ) {
1698                         $editContent = $result;
1699                         wfProfileOut( __METHOD__ );
1700                         return true;
1701                 } else {
1702                         wfProfileOut( __METHOD__ );
1703                         return false;
1704                 }
1705         }
1706
1707         /**
1708          * @return Revision
1709          */
1710         function getBaseRevision() {
1711                 if ( !$this->mBaseRevision ) {
1712                         $db = wfGetDB( DB_MASTER );
1713                         $baseRevision = Revision::loadFromTimestamp(
1714                                 $db, $this->mTitle, $this->edittime );
1715                         return $this->mBaseRevision = $baseRevision;
1716                 } else {
1717                         return $this->mBaseRevision;
1718                 }
1719         }
1720
1721         /**
1722          * Check given input text against $wgSpamRegex, and return the text of the first match.
1723          *
1724          * @param $text string
1725          *
1726          * @return string|bool matching string or false
1727          */
1728         public static function matchSpamRegex( $text ) {
1729                 global $wgSpamRegex;
1730                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1731                 $regexes = (array)$wgSpamRegex;
1732                 return self::matchSpamRegexInternal( $text, $regexes );
1733         }
1734
1735         /**
1736          * Check given input text against $wgSpamRegex, and return the text of the first match.
1737          *
1738          * @parma $text string
1739          *
1740          * @return string|bool  matching string or false
1741          */
1742         public static function matchSummarySpamRegex( $text ) {
1743                 global $wgSummarySpamRegex;
1744                 $regexes = (array)$wgSummarySpamRegex;
1745                 return self::matchSpamRegexInternal( $text, $regexes );
1746         }
1747
1748         /**
1749          * @param $text string
1750          * @param $regexes array
1751          * @return bool|string
1752          */
1753         protected static function matchSpamRegexInternal( $text, $regexes ) {
1754                 foreach ( $regexes as $regex ) {
1755                         $matches = array();
1756                         if ( preg_match( $regex, $text, $matches ) ) {
1757                                 return $matches[0];
1758                         }
1759                 }
1760                 return false;
1761         }
1762
1763         function setHeaders() {
1764                 global $wgOut, $wgUser;
1765
1766                 $wgOut->addModules( 'mediawiki.action.edit' );
1767
1768                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
1769                         $wgOut->addModules( 'mediawiki.legacy.preview' );
1770                 }
1771                 // Bug #19334: textarea jumps when editing articles in IE8
1772                 $wgOut->addStyle( 'common/IE80Fixes.css', 'screen', 'IE 8' );
1773
1774                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1775
1776                 # Enabled article-related sidebar, toplinks, etc.
1777                 $wgOut->setArticleRelated( true );
1778
1779                 $contextTitle = $this->getContextTitle();
1780                 if ( $this->isConflict ) {
1781                         $msg = 'editconflict';
1782                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
1783                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1784                 } else {
1785                         $msg = $contextTitle->exists() || ( $contextTitle->getNamespace() == NS_MEDIAWIKI && $contextTitle->getDefaultMessageText() !== false ) ?
1786                                 'editing' : 'creating';
1787                 }
1788                 # Use the title defined by DISPLAYTITLE magic word when present
1789                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
1790                 if ( $displayTitle === false ) {
1791                         $displayTitle = $contextTitle->getPrefixedText();
1792                 }
1793                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
1794         }
1795
1796         /**
1797          * Show all applicable editing introductions
1798          */
1799         protected function showIntro() {
1800                 global $wgOut, $wgUser;
1801                 if ( $this->suppressIntro ) {
1802                         return;
1803                 }
1804
1805                 $namespace = $this->mTitle->getNamespace();
1806
1807                 if ( $namespace == NS_MEDIAWIKI ) {
1808                         # Show a warning if editing an interface message
1809                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
1810                 } else if( $namespace == NS_FILE ) {
1811                         # Show a hint to shared repo
1812                         $file = wfFindFile( $this->mTitle );
1813                         if( $file && !$file->isLocal() ) {
1814                                 $descUrl = $file->getDescriptionUrl();
1815                                 # there must be a description url to show a hint to shared repo
1816                                 if( $descUrl ) {
1817                                         if( !$this->mTitle->exists() ) {
1818                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array (
1819                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
1820                                                 ) );
1821                                         } else {
1822                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
1823                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
1824                                                 ) );
1825                                         }
1826                                 }
1827                         }
1828                 }
1829
1830                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
1831                 # Show log extract when the user is currently blocked
1832                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
1833                         $parts = explode( '/', $this->mTitle->getText(), 2 );
1834                         $username = $parts[0];
1835                         $user = User::newFromName( $username, false /* allow IP users*/ );
1836                         $ip = User::isIP( $username );
1837                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
1838                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
1839                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
1840                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
1841                                 LogEventsList::showLogExtract(
1842                                         $wgOut,
1843                                         'block',
1844                                         $user->getUserPage(),
1845                                         '',
1846                                         array(
1847                                                 'lim' => 1,
1848                                                 'showIfEmpty' => false,
1849                                                 'msgKey' => array(
1850                                                         'blocked-notice-logextract',
1851                                                         $user->getName() # Support GENDER in notice
1852                                                 )
1853                                         )
1854                                 );
1855                         }
1856                 }
1857                 # Try to add a custom edit intro, or use the standard one if this is not possible.
1858                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
1859                         if ( $wgUser->isLoggedIn() ) {
1860                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
1861                         } else {
1862                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
1863                         }
1864                 }
1865                 # Give a notice if the user is editing a deleted/moved page...
1866                 if ( !$this->mTitle->exists() ) {
1867                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
1868                                 '', array( 'lim' => 10,
1869                                            'conds' => array( "log_action != 'revision'" ),
1870                                            'showIfEmpty' => false,
1871                                            'msgKey' => array( 'recreate-moveddeleted-warn' ) )
1872                         );
1873                 }
1874         }
1875
1876         /**
1877          * Attempt to show a custom editing introduction, if supplied
1878          *
1879          * @return bool
1880          */
1881         protected function showCustomIntro() {
1882                 if ( $this->editintro ) {
1883                         $title = Title::newFromText( $this->editintro );
1884                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
1885                                 global $wgOut;
1886                                 // Added using template syntax, to take <noinclude>'s into account.
1887                                 $wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
1888                                 return true;
1889                         } else {
1890                                 return false;
1891                         }
1892                 } else {
1893                         return false;
1894                 }
1895         }
1896
1897         /**
1898          * Send the edit form and related headers to $wgOut
1899          * @param $formCallback Callback that takes an OutputPage parameter; will be called
1900          *     during form output near the top, for captchas and the like.
1901          */
1902         function showEditForm( $formCallback = null ) {
1903                 global $wgOut, $wgUser;
1904
1905                 wfProfileIn( __METHOD__ );
1906
1907                 # need to parse the preview early so that we know which templates are used,
1908                 # otherwise users with "show preview after edit box" will get a blank list
1909                 # we parse this near the beginning so that setHeaders can do the title
1910                 # setting work instead of leaving it in getPreviewText
1911                 $previewOutput = '';
1912                 if ( $this->formtype == 'preview' ) {
1913                         $previewOutput = $this->getPreviewText();
1914                 }
1915
1916                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
1917
1918                 $this->setHeaders();
1919
1920                 if ( $this->showHeader() === false ) {
1921                         wfProfileOut( __METHOD__ );
1922                         return;
1923                 }
1924
1925                 $wgOut->addHTML( $this->editFormPageTop );
1926
1927                 if ( $wgUser->getOption( 'previewontop' ) ) {
1928                         $this->displayPreviewArea( $previewOutput, true );
1929                 }
1930
1931                 $wgOut->addHTML( $this->editFormTextTop );
1932
1933                 $showToolbar = true;
1934                 if ( $this->wasDeletedSinceLastEdit() ) {
1935                         if ( $this->formtype == 'save' ) {
1936                                 // Hide the toolbar and edit area, user can click preview to get it back
1937                                 // Add an confirmation checkbox and explanation.
1938                                 $showToolbar = false;
1939                         } else {
1940                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
1941                                         'deletedwhileediting' );
1942                         }
1943                 }
1944
1945                 #FIXME: add EditForm plugin interface and use it here! #FIXME: search for textarea1 and textares2, and allow EditForm to override all uses.
1946                 $wgOut->addHTML( Html::openElement( 'form', array( 'id' => self::EDITFORM_ID, 'name' => self::EDITFORM_ID,
1947                         'method' => 'post', 'action' => $this->getActionURL( $this->getContextTitle() ),
1948                         'enctype' => 'multipart/form-data' ) ) );
1949
1950                 if ( is_callable( $formCallback ) ) {
1951                         call_user_func_array( $formCallback, array( &$wgOut ) );
1952                 }
1953
1954                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1955
1956                 // Put these up at the top to ensure they aren't lost on early form submission
1957                 $this->showFormBeforeText();
1958
1959                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
1960                         $username = $this->lastDelete->user_name;
1961                         $comment = $this->lastDelete->log_comment;
1962
1963                         // It is better to not parse the comment at all than to have templates expanded in the middle
1964                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
1965                         $key = $comment === ''
1966                                 ? 'confirmrecreate-noreason'
1967                                 : 'confirmrecreate';
1968                         $wgOut->addHTML(
1969                                 '<div class="mw-confirm-recreate">' .
1970                                 wfMsgExt( $key, 'parseinline', $username, "<nowiki>$comment</nowiki>" ) .
1971                                 Xml::checkLabel( wfMsg( 'recreate' ), 'wpRecreate', 'wpRecreate', false,
1972                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
1973                                 ) .
1974                                 '</div>'
1975                         );
1976                 }
1977
1978                 # When the summary is hidden, also hide them on preview/show changes
1979                 if( $this->nosummary ) {
1980                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
1981                 }
1982
1983                 # If a blank edit summary was previously provided, and the appropriate
1984                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1985                 # user being bounced back more than once in the event that a summary
1986                 # is not required.
1987                 #####
1988                 # For a bit more sophisticated detection of blank summaries, hash the
1989                 # automatic one and pass that in the hidden field wpAutoSummary.
1990                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
1991                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
1992                 }
1993
1994                 if ( $this->hasPresetSummary ) {
1995                         // If a summary has been preset using &summary= we dont want to prompt for
1996                         // a different summary. Only prompt for a summary if the summary is blanked.
1997                         // (Bug 17416)
1998                         $this->autoSumm = md5( '' );
1999                 }
2000
2001                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2002                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2003
2004                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2005
2006                 $wgOut->addHTML( Html::hidden( 'format', $this->content_format ) );
2007                 $wgOut->addHTML( Html::hidden( 'model', $this->content_model ) );
2008
2009                 if ( $this->section == 'new' ) {
2010                         $this->showSummaryInput( true, $this->summary );
2011                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2012                 }
2013
2014                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2015
2016                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2017                         $wgOut->addHTML( EditPage::getEditToolbar() );
2018                 }
2019
2020                 if ( $this->isConflict ) {
2021                         // In an edit conflict bypass the overrideable content form method
2022                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2023                         // resolved between page source edits and custom ui edits using the
2024                         // custom edit ui.
2025                         $this->textbox2 = $this->textbox1;
2026
2027                         $content = $this->getCurrentContent();
2028                         $this->textbox1 = $content->serialize( $this->content_format );
2029
2030                         $this->showTextbox1();
2031                 } else {
2032                         $this->showContentForm();
2033                 }
2034
2035                 $wgOut->addHTML( $this->editFormTextAfterContent );
2036
2037                 $wgOut->addWikiText( $this->getCopywarn() );
2038
2039                 $wgOut->addHTML( $this->editFormTextAfterWarn );
2040
2041                 $this->showStandardInputs();
2042
2043                 $this->showFormAfterText();
2044
2045                 $this->showTosSummary();
2046
2047                 $this->showEditTools();
2048
2049                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2050
2051                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2052                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2053
2054                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2055                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2056
2057                 if ( $this->isConflict ) {
2058                         $this->showConflict();
2059                 }
2060
2061                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2062
2063                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2064                         $this->displayPreviewArea( $previewOutput, false );
2065                 }
2066
2067                 wfProfileOut( __METHOD__ );
2068         }
2069
2070         /**
2071          * Extract the section title from current section text, if any.
2072          *
2073          * @param string $text
2074          * @return Mixed|string or false
2075          */
2076         public static function extractSectionTitle( $text ) {
2077                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2078                 if ( !empty( $matches[2] ) ) {
2079                         global $wgParser;
2080                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2081                 } else {
2082                         return false;
2083                 }
2084         }
2085
2086         protected function showHeader() {
2087                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2088
2089                 if ( $this->mTitle->isTalkPage() ) {
2090                         $wgOut->addWikiMsg( 'talkpagetext' );
2091                 }
2092
2093                 # Optional notices on a per-namespace and per-page basis
2094                 $editnotice_ns = 'editnotice-' . $this->mTitle->getNamespace();
2095                 $editnotice_ns_message = wfMessage( $editnotice_ns );
2096                 if ( $editnotice_ns_message->exists() ) {
2097                         $wgOut->addWikiText( $editnotice_ns_message->plain() );
2098                 }
2099                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
2100                         $parts = explode( '/', $this->mTitle->getDBkey() );
2101                         $editnotice_base = $editnotice_ns;
2102                         while ( count( $parts ) > 0 ) {
2103                                 $editnotice_base .= '-' . array_shift( $parts );
2104                                 $editnotice_base_msg = wfMessage( $editnotice_base );
2105                                 if ( $editnotice_base_msg->exists() ) {
2106                                         $wgOut->addWikiText( $editnotice_base_msg->plain() );
2107                                 }
2108                         }
2109                 } else {
2110                         # Even if there are no subpages in namespace, we still don't want / in MW ns.
2111                         $editnoticeText = $editnotice_ns . '-' . str_replace( '/', '-', $this->mTitle->getDBkey() );
2112                         $editnoticeMsg = wfMessage( $editnoticeText );
2113                         if ( $editnoticeMsg->exists() ) {
2114                                 $wgOut->addWikiText( $editnoticeMsg->plain() );
2115                         }
2116                 }
2117
2118                 if ( $this->isConflict ) {
2119                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2120                         $this->edittime = $this->mArticle->getTimestamp();
2121                 } else {
2122                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2123                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2124                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2125                                 // Someone is welcome to try refactoring though
2126                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2127                                 return false;
2128                         }
2129
2130                         if ( $this->section != '' && $this->section != 'new' ) {
2131                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2132                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 );
2133                                         if ( $sectionTitle !== false ) {
2134                                                 $this->summary = "/* $sectionTitle */ ";
2135                                         }
2136                                 }
2137                         }
2138
2139                         if ( $this->missingComment ) {
2140                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2141                         }
2142
2143                         if ( $this->missingSummary && $this->section != 'new' ) {
2144                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2145                         }
2146
2147                         if ( $this->missingSummary && $this->section == 'new' ) {
2148                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2149                         }
2150
2151                         if ( $this->hookError !== '' ) {
2152                                 $wgOut->addWikiText( $this->hookError );
2153                         }
2154
2155                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2156                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2157                         }
2158
2159                         if ( $this->section != 'new' ) {
2160                                 $revision = $this->mArticle->getRevisionFetched();
2161                                 if ( $revision ) {
2162                                         // Let sysop know that this will make private content public if saved
2163
2164                                         if ( !$revision->userCan( Revision::DELETED_TEXT ) ) {
2165                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
2166                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2167                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
2168                                         }
2169
2170                                         if ( !$revision->isCurrent() ) {
2171                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2172                                                 $wgOut->addWikiMsg( 'editingold' );
2173                                         }
2174                                 } elseif ( $this->mTitle->exists() ) {
2175                                         // Something went wrong
2176
2177                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2178                                                 array( 'missing-article', $this->mTitle->getPrefixedText(),
2179                                                 wfMsgNoTrans( 'missingarticle-rev', $this->oldid ) ) );
2180                                 }
2181                         }
2182                 }
2183
2184                 if ( wfReadOnly() ) {
2185                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
2186                 } elseif ( $wgUser->isAnon() ) {
2187                         if ( $this->formtype != 'preview' ) {
2188                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
2189                         } else {
2190                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
2191                         }
2192                 } else {
2193                         if ( $this->isCssJsSubpage ) {
2194                                 # Check the skin exists
2195                                 if ( $this->isWrongCaseCssJsPage ) {
2196                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
2197                                 }
2198                                 if ( $this->formtype !== 'preview' ) {
2199                                         if ( $this->isCssSubpage )
2200                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
2201                                         if ( $this->isJsSubpage )
2202                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
2203                                 }
2204                         }
2205                 }
2206
2207                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2208                         # Is the title semi-protected?
2209                         if ( $this->mTitle->isSemiProtected() ) {
2210                                 $noticeMsg = 'semiprotectedpagewarning';
2211                         } else {
2212                                 # Then it must be protected based on static groups (regular)
2213                                 $noticeMsg = 'protectedpagewarning';
2214                         }
2215                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2216                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2217                 }
2218                 if ( $this->mTitle->isCascadeProtected() ) {
2219                         # Is this page under cascading protection from some source pages?
2220                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2221                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2222                         $cascadeSourcesCount = count( $cascadeSources );
2223                         if ( $cascadeSourcesCount > 0 ) {
2224                                 # Explain, and list the titles responsible
2225                                 foreach ( $cascadeSources as $page ) {
2226                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2227                                 }
2228                         }
2229                         $notice .= '</div>';
2230                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2231                 }
2232                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2233                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2234                                 array( 'lim' => 1,
2235                                         'showIfEmpty' => false,
2236                                         'msgKey' => array( 'titleprotectedwarning' ),
2237                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2238                 }
2239
2240                 if ( $this->kblength === false ) {
2241                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2242                 }
2243
2244                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2245                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2246                                 array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
2247                 } else {
2248                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2249                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2250                                         array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
2251                                 );
2252                         }
2253                 }
2254         }
2255
2256         /**
2257          * Standard summary input and label (wgSummary), abstracted so EditPage
2258          * subclasses may reorganize the form.
2259          * Note that you do not need to worry about the label's for=, it will be
2260          * inferred by the id given to the input. You can remove them both by
2261          * passing array( 'id' => false ) to $userInputAttrs.
2262          *
2263          * @param $summary string The value of the summary input
2264          * @param $labelText string The html to place inside the label
2265          * @param $inputAttrs array of attrs to use on the input
2266          * @param $spanLabelAttrs array of attrs to use on the span inside the label
2267          *
2268          * @return array An array in the format array( $label, $input )
2269          */
2270         function getSummaryInput( $summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null ) {
2271                 // Note: the maxlength is overriden in JS to 250 and to make it use UTF-8 bytes, not characters.
2272                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2273                         'id' => 'wpSummary',
2274                         'maxlength' => '200',
2275                         'tabindex' => '1',
2276                         'size' => 60,
2277                         'spellcheck' => 'true',
2278                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2279
2280                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2281                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2282                         'id' => "wpSummaryLabel"
2283                 );
2284
2285                 $label = null;
2286                 if ( $labelText ) {
2287                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
2288                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2289                 }
2290
2291                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2292
2293                 return array( $label, $input );
2294         }
2295
2296         /**
2297          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2298          *                          up top, or false if this is the comment summary
2299          *                          down below the textarea
2300          * @param $summary String: The text of the summary to display
2301          * @return String
2302          */
2303         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2304                 global $wgOut, $wgContLang;
2305                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2306                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2307                 if ( $isSubjectPreview ) {
2308                         if ( $this->nosummary ) {
2309                                 return;
2310                         }
2311                 } else {
2312                         if ( !$this->mShowSummaryField ) {
2313                                 return;
2314                         }
2315                 }
2316                 $summary = $wgContLang->recodeForEdit( $summary );
2317                 $labelText = wfMsgExt( $isSubjectPreview ? 'subject' : 'summary', 'parseinline' );
2318                 list( $label, $input ) = $this->getSummaryInput( $summary, $labelText, array( 'class' => $summaryClass ), array() );
2319                 $wgOut->addHTML( "{$label} {$input}" );
2320         }
2321
2322         /**
2323          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2324          *                          up top, or false if this is the comment summary
2325          *                          down below the textarea
2326          * @param $summary String: the text of the summary to display
2327          * @return String
2328          */
2329         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2330                 if ( !$summary || ( !$this->preview && !$this->diff ) )
2331                         return "";
2332
2333                 global $wgParser;
2334
2335                 if ( $isSubjectPreview )
2336                         $summary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $summary ) );
2337
2338                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2339
2340                 $summary = wfMsgExt( $message, 'parseinline' ) . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2341                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2342         }
2343
2344         protected function showFormBeforeText() {
2345                 global $wgOut;
2346                 $section = htmlspecialchars( $this->section );
2347                 $wgOut->addHTML( <<<HTML
2348 <input type='hidden' value="{$section}" name="wpSection" />
2349 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2350 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2351 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2352
2353 HTML
2354                 );
2355                 if ( !$this->checkUnicodeCompliantBrowser() )
2356                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2357         }
2358
2359         protected function showFormAfterText() {
2360                 global $wgOut, $wgUser;
2361                 /**
2362                  * To make it harder for someone to slip a user a page
2363                  * which submits an edit form to the wiki without their
2364                  * knowledge, a random token is associated with the login
2365                  * session. If it's not passed back with the submission,
2366                  * we won't save the page, or render user JavaScript and
2367                  * CSS previews.
2368                  *
2369                  * For anon editors, who may not have a session, we just
2370                  * include the constant suffix to prevent editing from
2371                  * broken text-mangling proxies.
2372                  */
2373                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2374         }
2375
2376         /**
2377          * Subpage overridable method for printing the form for page content editing
2378          * By default this simply outputs wpTextbox1
2379          * Subclasses can override this to provide a custom UI for editing;
2380          * be it a form, or simply wpTextbox1 with a modified content that will be
2381          * reverse modified when extracted from the post data.
2382          * Note that this is basically the inverse for importContentFormData
2383          */
2384         protected function showContentForm() {
2385                 $this->showTextbox1();
2386         }
2387
2388         /**
2389          * Method to output wpTextbox1
2390          * The $textoverride method can be used by subclasses overriding showContentForm
2391          * to pass back to this method.
2392          *
2393          * @param $customAttribs array of html attributes to use in the textarea
2394          * @param $textoverride String: optional text to override $this->textarea1 with
2395          */
2396         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2397                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2398                         $attribs = array( 'style' => 'display:none;' );
2399                 } else {
2400                         $classes = array(); // Textarea CSS
2401                         if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2402                                 # Is the title semi-protected?
2403                                 if ( $this->mTitle->isSemiProtected() ) {
2404                                         $classes[] = 'mw-textarea-sprotected';
2405                                 } else {
2406                                         # Then it must be protected based on static groups (regular)
2407                                         $classes[] = 'mw-textarea-protected';
2408                                 }
2409                                 # Is the title cascade-protected?
2410                                 if ( $this->mTitle->isCascadeProtected() ) {
2411                                         $classes[] = 'mw-textarea-cprotected';
2412                                 }
2413                         }
2414
2415                         $attribs = array( 'tabindex' => 1 );
2416
2417                         if ( is_array( $customAttribs ) ) {
2418                                 $attribs += $customAttribs;
2419                         }
2420
2421                         if ( count( $classes ) ) {
2422                                 if ( isset( $attribs['class'] ) ) {
2423                                         $classes[] = $attribs['class'];
2424                                 }
2425                                 $attribs['class'] = implode( ' ', $classes );
2426                         }
2427                 }
2428
2429                 $this->showTextbox( $textoverride !== null ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
2430         }
2431
2432         protected function showTextbox2() {
2433                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2434         }
2435
2436         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2437                 global $wgOut, $wgUser;
2438
2439                 $wikitext = $this->safeUnicodeOutput( $text );
2440                 if ( strval( $wikitext ) !== '' ) {
2441                         // Ensure there's a newline at the end, otherwise adding lines
2442                         // is awkward.
2443                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2444                         // mode will show an extra newline. A bit annoying.
2445                         $wikitext .= "\n";
2446                 }
2447
2448                 $attribs = $customAttribs + array(
2449                         'accesskey' => ',',
2450                         'id'   => $name,
2451                         'cols' => $wgUser->getIntOption( 'cols' ),
2452                         'rows' => $wgUser->getIntOption( 'rows' ),
2453                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
2454                 );
2455
2456                 $pageLang = $this->mTitle->getPageLanguage();
2457                 $attribs['lang'] = $pageLang->getCode();
2458                 $attribs['dir'] = $pageLang->getDir();
2459
2460                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2461         }
2462
2463         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2464                 global $wgOut;
2465                 $classes = array();
2466                 if ( $isOnTop )
2467                         $classes[] = 'ontop';
2468
2469                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2470
2471                 if ( $this->formtype != 'preview' )
2472                         $attribs['style'] = 'display: none;';
2473
2474                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2475
2476                 if ( $this->formtype == 'preview' ) {
2477                         $this->showPreview( $previewOutput );
2478                 }
2479
2480                 $wgOut->addHTML( '</div>' );
2481
2482                 if ( $this->formtype == 'diff' ) {
2483                         $this->showDiff();
2484                 }
2485         }
2486
2487         /**
2488          * Append preview output to $wgOut.
2489          * Includes category rendering if this is a category page.
2490          *
2491          * @param $text String: the HTML to be output for the preview.
2492          */
2493         protected function showPreview( $text ) {
2494                 global $wgOut;
2495                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2496                         $this->mArticle->openShowCategory();
2497                 }
2498                 # This hook seems slightly odd here, but makes things more
2499                 # consistent for extensions.
2500                 wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
2501                 $wgOut->addHTML( $text );
2502                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2503                         $this->mArticle->closeShowCategory();
2504                 }
2505         }
2506
2507         /**
2508          * Get a diff between the current contents of the edit box and the
2509          * version of the page we're editing from.
2510          *
2511          * If this is a section edit, we'll replace the section as for final
2512          * save and then make a comparison.
2513          */
2514         function showDiff() {
2515                 global $wgUser, $wgContLang, $wgParser, $wgOut;
2516
2517                 $oldtitlemsg = 'currentrev';
2518                 # if message does not exist, show diff against the preloaded default
2519                 if( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
2520                         $oldtext = $this->mTitle->getDefaultMessageText();
2521                         if( $oldtext !== false ) {
2522                                 $oldtitlemsg = 'defaultmessagetext';
2523                                 $oldContent = ContentHandler::makeContent( $oldtext, $this->mTitle );
2524                         } else {
2525                                 $oldContent = null;
2526                         }
2527                 } else {
2528                         $oldContent = $this->getOriginalContent();
2529                 }
2530
2531                 $textboxContent = ContentHandler::makeContent( $this->textbox1, $this->getTitle(),
2532                                                                                                                 $this->content_model, $this->content_format ); #XXX: handle parse errors ?
2533
2534                 $newContent = $this->mArticle->replaceSectionContent(
2535                                                                                                         $this->section, $textboxContent,
2536                                                                                                         $this->summary, $this->edittime );
2537
2538                 # hanlde legacy text-based hook
2539                 $newtext_orig = $newContent->serialize( $this->content_format );
2540                 $newtext = $newtext_orig; #clone
2541                 wfRunHooks( 'EditPageGetDiffText', array( $this, &$newtext ) );
2542
2543                 if ( $newtext != $newtext_orig ) {
2544                                                 #if the hook changed the text, create a new Content object accordingly.
2545                                                 $newContent = ContentHandler::makeContent( $newtext, $this->getTitle(), $newContent->getModel() ); #XXX: handle parse errors ?
2546                 }
2547
2548                 wfRunHooks( 'EditPageGetDiffContent', array( $this, &$newContent ) );
2549
2550                 $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
2551                 $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
2552
2553                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
2554                         $oldtitle = wfMsgExt( $oldtitlemsg, array( 'parseinline' ) );
2555                         $newtitle = wfMsgExt( 'yourtext', array( 'parseinline' ) );
2556
2557                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
2558                         $de->setContent( $oldContent, $newContent );
2559
2560                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2561                         $de->showDiffStyle();
2562                 } else {
2563                         $difftext = '';
2564                 }
2565
2566                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2567         }
2568
2569         /**
2570          * Give a chance for site and per-namespace customizations of
2571          * terms of service summary link that might exist separately
2572          * from the copyright notice.
2573          *
2574          * This will display between the save button and the edit tools,
2575          * so should remain short!
2576          */
2577         protected function showTosSummary() {
2578                 $msg = 'editpage-tos-summary';
2579                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
2580                 if ( !wfMessage( $msg )->isDisabled() ) {
2581                         global $wgOut;
2582                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
2583                         $wgOut->addWikiMsg( $msg );
2584                         $wgOut->addHTML( '</div>' );
2585                 }
2586         }
2587
2588         protected function showEditTools() {
2589                 global $wgOut;
2590                 $wgOut->addHTML( '<div class="mw-editTools">' .
2591                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
2592                         '</div>' );
2593         }
2594
2595         protected function getCopywarn() {
2596                 global $wgRightsText;
2597                 if ( $wgRightsText ) {
2598                         $copywarnMsg = array( 'copyrightwarning',
2599                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
2600                                 $wgRightsText );
2601                 } else {
2602                         $copywarnMsg = array( 'copyrightwarning2',
2603                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
2604                 }
2605                 // Allow for site and per-namespace customization of contribution/copyright notice.
2606                 wfRunHooks( 'EditPageCopyrightWarning', array( $this->mTitle, &$copywarnMsg ) );
2607
2608                 return "<div id=\"editpage-copywarn\">\n" .
2609                         call_user_func_array( "wfMsgNoTrans", $copywarnMsg ) . "\n</div>";
2610         }
2611
2612         protected function showStandardInputs( &$tabindex = 2 ) {
2613                 global $wgOut;
2614                 $wgOut->addHTML( "<div class='editOptions'>\n" );
2615
2616                 if ( $this->section != 'new' ) {
2617                         $this->showSummaryInput( false, $this->summary );
2618                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
2619                 }
2620
2621                 $checkboxes = $this->getCheckboxes( $tabindex,
2622                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
2623                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
2624                 $wgOut->addHTML( "<div class='editButtons'>\n" );
2625                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
2626
2627                 $cancel = $this->getCancelLink();
2628                 if ( $cancel !== '' ) {
2629                         $cancel .= wfMsgExt( 'pipe-separator' , 'escapenoentities' );
2630                 }
2631                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ) );
2632                 $edithelp = '<a target="helpwindow" href="' . $edithelpurl . '">' .
2633                         htmlspecialchars( wfMsg( 'edithelp' ) ) . '</a> ' .
2634                         htmlspecialchars( wfMsg( 'newwindow' ) );
2635                 $wgOut->addHTML( "      <span class='editHelp'>{$cancel}{$edithelp}</span>\n" );
2636                 $wgOut->addHTML( "</div><!-- editButtons -->\n</div><!-- editOptions -->\n" );
2637         }
2638
2639         /**
2640          * Show an edit conflict. textbox1 is already shown in showEditForm().
2641          * If you want to use another entry point to this function, be careful.
2642          */
2643         protected function showConflict() {
2644                 global $wgOut;
2645
2646                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
2647                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2648
2649                         $content1 = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format ); #XXX: handle parse errors?
2650                         $content2 = ContentHandler::makeContent( $this->textbox2, $this->getTitle(), $this->content_model, $this->content_format ); #XXX: handle parse errors?
2651
2652                         $handler = ContentHandler::getForModelID( $this->content_model );
2653                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
2654                         $de->setContent( $content2, $content1 );
2655                         $de->showDiff( wfMsgExt( 'yourtext', 'parseinline' ), wfMsg( 'storedversion' ) );
2656
2657                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2658                         $this->showTextbox2();
2659                 }
2660         }
2661
2662         /**
2663          * @return string
2664          */
2665         public function getCancelLink() {
2666                 $cancelParams = array();
2667                 if ( !$this->isConflict && $this->oldid > 0 ) {
2668                         $cancelParams['oldid'] = $this->oldid;
2669                 }
2670
2671                 return Linker::linkKnown(
2672                         $this->getContextTitle(),
2673                         wfMsgExt( 'cancel', array( 'parseinline' ) ),
2674                         array( 'id' => 'mw-editform-cancel' ),
2675                         $cancelParams
2676                 );
2677         }
2678
2679         /**
2680          * Returns the URL to use in the form's action attribute.
2681          * This is used by EditPage subclasses when simply customizing the action
2682          * variable in the constructor is not enough. This can be used when the
2683          * EditPage lives inside of a Special page rather than a custom page action.
2684          *
2685          * @param $title Title object for which is being edited (where we go to for &action= links)
2686          * @return string
2687          */
2688         protected function getActionURL( Title $title ) {
2689                 return $title->getLocalURL( array( 'action' => $this->action ) );
2690         }
2691
2692         /**
2693          * Check if a page was deleted while the user was editing it, before submit.
2694          * Note that we rely on the logging table, which hasn't been always there,
2695          * but that doesn't matter, because this only applies to brand new
2696          * deletes.
2697          */
2698         protected function wasDeletedSinceLastEdit() {
2699                 if ( $this->deletedSinceEdit !== null ) {
2700                         return $this->deletedSinceEdit;
2701                 }
2702
2703                 $this->deletedSinceEdit = false;
2704
2705                 if ( $this->mTitle->isDeletedQuick() ) {
2706                         $this->lastDelete = $this->getLastDelete();
2707                         if ( $this->lastDelete ) {
2708                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
2709                                 if ( $deleteTime > $this->starttime ) {
2710                                         $this->deletedSinceEdit = true;
2711                                 }
2712                         }
2713                 }
2714
2715                 return $this->deletedSinceEdit;
2716         }
2717
2718         protected function getLastDelete() {
2719                 $dbr = wfGetDB( DB_SLAVE );
2720                 $data = $dbr->selectRow(
2721                         array( 'logging', 'user' ),
2722                         array( 'log_type',
2723                                    'log_action',
2724                                    'log_timestamp',
2725                                    'log_user',
2726                                    'log_namespace',
2727                                    'log_title',
2728                                    'log_comment',
2729                                    'log_params',
2730                                    'log_deleted',
2731                                    'user_name' ),
2732                         array( 'log_namespace' => $this->mTitle->getNamespace(),
2733                                    'log_title' => $this->mTitle->getDBkey(),
2734                                    'log_type' => 'delete',
2735                                    'log_action' => 'delete',
2736                                    'user_id=log_user' ),
2737                         __METHOD__,
2738                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
2739                 );
2740                 // Quick paranoid permission checks...
2741                 if ( is_object( $data ) ) {
2742                         if ( $data->log_deleted & LogPage::DELETED_USER )
2743                                 $data->user_name = wfMsgHtml( 'rev-deleted-user' );
2744                         if ( $data->log_deleted & LogPage::DELETED_COMMENT )
2745                                 $data->log_comment = wfMsgHtml( 'rev-deleted-comment' );
2746                 }
2747                 return $data;
2748         }
2749
2750         /**
2751          * Get the rendered text for previewing.
2752          * @return string
2753          */
2754         function getPreviewText() {
2755                 global $wgOut, $wgUser, $wgParser, $wgRawHtml, $wgLang;
2756
2757                 wfProfileIn( __METHOD__ );
2758
2759                 if ( $wgRawHtml && !$this->mTokenOk ) {
2760                         // Could be an offsite preview attempt. This is very unsafe if
2761                         // HTML is enabled, as it could be an attack.
2762                         $parsedNote = '';
2763                         if ( $this->textbox1 !== '' ) {
2764                                 // Do not put big scary notice, if previewing the empty
2765                                 // string, which happens when you initially edit
2766                                 // a category page, due to automatic preview-on-open.
2767                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
2768                                         wfMsg( 'session_fail_preview_html' ) . "</div>", true, /* interface */true );
2769                         }
2770                         wfProfileOut( __METHOD__ );
2771                         return $parsedNote;
2772                 }
2773
2774                 $note = '';
2775
2776                 try {
2777                         $content = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format );
2778
2779                         if ( $this->mTriedSave && !$this->mTokenOk ) {
2780                                 if ( $this->mTokenOkExceptSuffix ) {
2781                                         $note = wfMsg( 'token_suffix_mismatch' );
2782                                 } else {
2783                                         $note = wfMsg( 'session_fail_preview' );
2784                                 }
2785                         } elseif ( $this->incompleteForm ) {
2786                                 $note = wfMsg( 'edit_form_incomplete' );
2787                         } else {
2788                                 $note = wfMsg( 'previewnote' ) .
2789                                         ' [[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' . wfMsg( 'continue-editing' ) . ']]';
2790                         }
2791
2792                         $parserOptions = ParserOptions::newFromUser( $wgUser );
2793                         $parserOptions->setEditSection( false );
2794                         $parserOptions->setTidy( true );
2795                         $parserOptions->setIsPreview( true );
2796                         $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
2797
2798                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
2799                                 # don't parse non-wikitext pages, show message about preview
2800                                 if( $this->mTitle->isCssJsSubpage() ) {
2801                                         $level = 'user';
2802                                 } elseif( $this->mTitle->isCssOrJsPage() ) {
2803                                         $level = 'site';
2804                                 } else {
2805                                         $level = false;
2806                                 }
2807
2808                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
2809                                         $format = 'css';
2810                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
2811                                         $format = 'js';
2812                                 } else {
2813                                         $format = false;
2814                                 }
2815
2816                                 # Used messages to make sure grep find them:
2817                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
2818                                 if( $level && $format ) {
2819                                         $note = "<div id='mw-{$level}{$format}preview'>" . wfMsg( "{$level}{$format}preview" ) . "</div>";
2820                                 } else {
2821                                         $note = wfMsg( 'previewnote' );
2822                                 }
2823                         } else {
2824                                 $note = wfMsg( 'previewnote' );
2825                         }
2826
2827                         $rt = $content->getRedirectChain();
2828
2829                         if ( $rt ) {
2830                                 $previewHTML = $this->mArticle->viewRedirect( $rt, false );
2831                         } else {
2832
2833                                 # If we're adding a comment, we need to show the
2834                                 # summary as the headline
2835                                 if ( $this->section == "new" && $this->summary != "" ) {
2836                                         $content = $content->addSectionHeader( $this->summary );
2837                                 }
2838
2839                                 $toparse_orig = $content->serialize( $this->content_format );
2840                                 $toparse = $toparse_orig;
2841                                 wfRunHooks( 'EditPageGetPreviewText', array( $this, &$toparse ) );
2842
2843                                 if ( $toparse !== $toparse_orig ) {
2844                                         #hook changed the text, create new Content object
2845                                         $content = ContentHandler::makeContent( $toparse, $this->getTitle(), $this->content_model, $this->content_format );
2846                                 }
2847
2848                                 wfRunHooks( 'EditPageGetPreviewContent', array( $this, &$content ) );
2849
2850                                 $parserOptions->enableLimitReport();
2851
2852                                 #XXX: For CSS/JS pages, we should have called the ShowRawCssJs hook here. But it's now deprecated, so never mind
2853                                 $content = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
2854
2855                                 // TODO: might be a saner way to get a meaningfull context here?
2856                                 $parserOutput = $content->getParserOutput( $this->getArticle()->getTitle(), null, $parserOptions );
2857
2858                                 $previewHTML = $parserOutput->getText();
2859                                 $this->mParserOutput = $parserOutput;
2860                                 $wgOut->addParserOutputNoText( $parserOutput );
2861
2862                                 if ( count( $parserOutput->getWarnings() ) ) {
2863                                         $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
2864                                 }
2865                         }
2866                 } catch (MWContentSerializationException $ex) {
2867                         $note .= "\n\n" . wfMsg('content-failed-to-parse', $this->content_model, $this->content_format, $ex->getMessage() );
2868                         $previewHTML = '';
2869                 }
2870
2871                 if ( $this->isConflict ) {
2872                         $conflict = '<h2 id="mw-previewconflict">' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
2873                 } else {
2874                         $conflict = '<hr />';
2875                 }
2876
2877                 $previewhead = "<div class='previewnote'>\n" .
2878                         '<h2 id="mw-previewheader">' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>" .
2879                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
2880
2881                 $pageLang = $this->mTitle->getPageLanguage();
2882                 $attribs = array( 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
2883                         'class' => 'mw-content-' . $pageLang->getDir() );
2884                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
2885
2886                 wfProfileOut( __METHOD__ );
2887                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
2888         }
2889
2890         /**
2891          * @return Array
2892          */
2893         function getTemplates() {
2894                 if ( $this->preview || $this->section != '' ) {
2895                         $templates = array();
2896                         if ( !isset( $this->mParserOutput ) ) {
2897                                 return $templates;
2898                         }
2899                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
2900                                 foreach ( array_keys( $template ) as $dbk ) {
2901                                         $templates[] = Title::makeTitle( $ns, $dbk );
2902                                 }
2903                         }
2904                         return $templates;
2905                 } else {
2906                         return $this->mTitle->getTemplateLinksFrom();
2907                 }
2908         }
2909
2910         /**
2911          * Shows a bulletin board style toolbar for common editing functions.
2912          * It can be disabled in the user preferences.
2913          * The necessary JavaScript code can be found in skins/common/edit.js.
2914          *
2915          * @return string
2916          */
2917         static function getEditToolbar() {
2918                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
2919                 global $wgUseTeX, $wgEnableUploads, $wgForeignFileRepos;
2920
2921                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
2922
2923                 /**
2924                  * $toolarray is an array of arrays each of which includes the
2925                  * filename of the button image (without path), the opening
2926                  * tag, the closing tag, optionally a sample text that is
2927                  * inserted between the two when no selection is highlighted
2928                  * and.  The tip text is shown when the user moves the mouse
2929                  * over the button.
2930                  *
2931                  * Also here: accesskeys (key), which are not used yet until
2932                  * someone can figure out a way to make them work in
2933                  * IE. However, we should make sure these keys are not defined
2934                  * on the edit page.
2935                  */
2936                 $toolarray = array(
2937                         array(
2938                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
2939                                 'id'     => 'mw-editbutton-bold',
2940                                 'open'   => '\'\'\'',
2941                                 'close'  => '\'\'\'',
2942                                 'sample' => wfMsg( 'bold_sample' ),
2943                                 'tip'    => wfMsg( 'bold_tip' ),
2944                                 'key'    => 'B'
2945                         ),
2946                         array(
2947                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
2948                                 'id'     => 'mw-editbutton-italic',
2949                                 'open'   => '\'\'',
2950                                 'close'  => '\'\'',
2951                                 'sample' => wfMsg( 'italic_sample' ),
2952                                 'tip'    => wfMsg( 'italic_tip' ),
2953                                 'key'    => 'I'
2954                         ),
2955                         array(
2956                                 'image'  => $wgLang->getImageFile( 'button-link' ),
2957                                 'id'     => 'mw-editbutton-link',
2958                                 'open'   => '[[',
2959                                 'close'  => ']]',
2960                                 'sample' => wfMsg( 'link_sample' ),
2961                                 'tip'    => wfMsg( 'link_tip' ),
2962                                 'key'    => 'L'
2963                         ),
2964                         array(
2965                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
2966                                 'id'     => 'mw-editbutton-extlink',
2967                                 'open'   => '[',
2968                                 'close'  => ']',
2969                                 'sample' => wfMsg( 'extlink_sample' ),
2970                                 'tip'    => wfMsg( 'extlink_tip' ),
2971                                 'key'    => 'X'
2972                         ),
2973                         array(
2974                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
2975                                 'id'     => 'mw-editbutton-headline',
2976                                 'open'   => "\n== ",
2977                                 'close'  => " ==\n",
2978                                 'sample' => wfMsg( 'headline_sample' ),
2979                                 'tip'    => wfMsg( 'headline_tip' ),
2980                                 'key'    => 'H'
2981                         ),
2982                         $imagesAvailable ? array(
2983                                 'image'  => $wgLang->getImageFile( 'button-image' ),
2984                                 'id'     => 'mw-editbutton-image',
2985                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
2986                                 'close'  => ']]',
2987                                 'sample' => wfMsg( 'image_sample' ),
2988                                 'tip'    => wfMsg( 'image_tip' ),
2989                                 'key'    => 'D',
2990                         ) : false,
2991                         $imagesAvailable ? array(
2992                                 'image'  => $wgLang->getImageFile( 'button-media' ),
2993                                 'id'     => 'mw-editbutton-media',
2994                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
2995                                 'close'  => ']]',
2996                                 'sample' => wfMsg( 'media_sample' ),
2997                                 'tip'    => wfMsg( 'media_tip' ),
2998                                 'key'    => 'M'
2999                         ) : false,
3000                         $wgUseTeX ? array(
3001                                 'image'  => $wgLang->getImageFile( 'button-math' ),
3002                                 'id'     => 'mw-editbutton-math',
3003                                 'open'   => "<math>",
3004                                 'close'  => "</math>",
3005                                 'sample' => wfMsg( 'math_sample' ),
3006                                 'tip'    => wfMsg( 'math_tip' ),
3007                                 'key'    => 'C'
3008                         ) : false,
3009                         array(
3010                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
3011                                 'id'     => 'mw-editbutton-nowiki',
3012                                 'open'   => "<nowiki>",
3013                                 'close'  => "</nowiki>",
3014                                 'sample' => wfMsg( 'nowiki_sample' ),
3015                                 'tip'    => wfMsg( 'nowiki_tip' ),
3016                                 'key'    => 'N'
3017                         ),
3018                         array(
3019                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
3020                                 'id'     => 'mw-editbutton-signature',
3021                                 'open'   => '--~~~~',
3022                                 'close'  => '',
3023                                 'sample' => '',
3024                                 'tip'    => wfMsg( 'sig_tip' ),
3025                                 'key'    => 'Y'
3026                         ),
3027                         array(
3028                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
3029                                 'id'     => 'mw-editbutton-hr',
3030                                 'open'   => "\n----\n",
3031                                 'close'  => '',
3032                                 'sample' => '',
3033                                 'tip'    => wfMsg( 'hr_tip' ),
3034                                 'key'    => 'R'
3035                         )
3036                 );
3037
3038                 $script = 'mw.loader.using("mediawiki.action.edit", function() {';
3039                 foreach ( $toolarray as $tool ) {
3040                         if ( !$tool ) {
3041                                 continue;
3042                         }
3043
3044                         $params = array(
3045                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
3046                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3047                                 // Older browsers show a "speedtip" type message only for ALT.
3048                                 // Ideally these should be different, realistically they
3049                                 // probably don't need to be.
3050                                 $tip = $tool['tip'],
3051                                 $open = $tool['open'],
3052                                 $close = $tool['close'],
3053                                 $sample = $tool['sample'],
3054                                 $cssId = $tool['id'],
3055                         );
3056
3057                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
3058                 }
3059
3060                 // This used to be called on DOMReady from mediawiki.action.edit, which
3061                 // ended up causing race conditions with the setup code above.
3062                 $script .= "\n" .
3063                         "// Create button bar\n" .
3064                         "$(function() { mw.toolbar.init(); } );\n";
3065
3066                 $script .= '});';
3067                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3068
3069                 $toolbar = '<div id="toolbar"></div>';
3070
3071                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3072
3073                 return $toolbar;
3074         }
3075
3076         /**
3077          * Returns an array of html code of the following checkboxes:
3078          * minor and watch
3079          *
3080          * @param $tabindex int Current tabindex
3081          * @param $checked Array of checkbox => bool, where bool indicates the checked
3082          *                 status of the checkbox
3083          *
3084          * @return array
3085          */
3086         public function getCheckboxes( &$tabindex, $checked ) {
3087                 global $wgUser;
3088
3089                 $checkboxes = array();
3090
3091                 // don't show the minor edit checkbox if it's a new page or section
3092                 if ( !$this->isNew ) {
3093                         $checkboxes['minor'] = '';
3094                         $minorLabel = wfMsgExt( 'minoredit', array( 'parseinline' ) );
3095                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3096                                 $attribs = array(
3097                                         'tabindex'  => ++$tabindex,
3098                                         'accesskey' => wfMsg( 'accesskey-minoredit' ),
3099                                         'id'        => 'wpMinoredit',
3100                                 );
3101                                 $checkboxes['minor'] =
3102                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3103                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3104                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3105                                         ">{$minorLabel}</label>";
3106                         }
3107                 }
3108
3109                 $watchLabel = wfMsgExt( 'watchthis', array( 'parseinline' ) );
3110                 $checkboxes['watch'] = '';
3111                 if ( $wgUser->isLoggedIn() ) {
3112                         $attribs = array(
3113                                 'tabindex'  => ++$tabindex,
3114                                 'accesskey' => wfMsg( 'accesskey-watch' ),
3115                                 'id'        => 'wpWatchthis',
3116                         );
3117                         $checkboxes['watch'] =
3118                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3119                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3120                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3121                                 ">{$watchLabel}</label>";
3122                 }
3123                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3124                 return $checkboxes;
3125         }
3126
3127         /**
3128          * Returns an array of html code of the following buttons:
3129          * save, diff, preview and live
3130          *
3131          * @param $tabindex int Current tabindex
3132          *
3133          * @return array
3134          */
3135         public function getEditButtons( &$tabindex ) {
3136                 $buttons = array();
3137
3138                 $temp = array(
3139                         'id'        => 'wpSave',
3140                         'name'      => 'wpSave',
3141                         'type'      => 'submit',
3142                         'tabindex'  => ++$tabindex,
3143                         'value'     => wfMsg( 'savearticle' ),
3144                         'accesskey' => wfMsg( 'accesskey-save' ),
3145                         'title'     => wfMsg( 'tooltip-save' ) . ' [' . wfMsg( 'accesskey-save' ) . ']',
3146                 );
3147                 $buttons['save'] = Xml::element( 'input', $temp, '' );
3148
3149                 ++$tabindex; // use the same for preview and live preview
3150                 $temp = array(
3151                         'id'        => 'wpPreview',
3152                         'name'      => 'wpPreview',
3153                         'type'      => 'submit',
3154                         'tabindex'  => $tabindex,
3155                         'value'     => wfMsg( 'showpreview' ),
3156                         'accesskey' => wfMsg( 'accesskey-preview' ),
3157                         'title'     => wfMsg( 'tooltip-preview' ) . ' [' . wfMsg( 'accesskey-preview' ) . ']',
3158                 );
3159                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
3160                 $buttons['live'] = '';
3161
3162                 $temp = array(
3163                         'id'        => 'wpDiff',
3164                         'name'      => 'wpDiff',
3165                         'type'      => 'submit',
3166                         'tabindex'  => ++$tabindex,
3167                         'value'     => wfMsg( 'showdiff' ),
3168                         'accesskey' => wfMsg( 'accesskey-diff' ),
3169                         'title'     => wfMsg( 'tooltip-diff' ) . ' [' . wfMsg( 'accesskey-diff' ) . ']',
3170                 );
3171                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
3172
3173                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3174                 return $buttons;
3175         }
3176
3177         /**
3178          * Output preview text only. This can be sucked into the edit page
3179          * via JavaScript, and saves the server time rendering the skin as
3180          * well as theoretically being more robust on the client (doesn't
3181          * disturb the edit box's undo history, won't eat your text on
3182          * failure, etc).
3183          *
3184          * @todo This doesn't include category or interlanguage links.
3185          *       Would need to enhance it a bit, <s>maybe wrap them in XML
3186          *       or something...</s> that might also require more skin
3187          *       initialization, so check whether that's a problem.
3188          */
3189         function livePreview() {
3190                 global $wgOut;
3191                 $wgOut->disable();
3192                 header( 'Content-type: text/xml; charset=utf-8' );
3193                 header( 'Cache-control: no-cache' );
3194
3195                 $previewText = $this->getPreviewText();
3196                 #$categories = $skin->getCategoryLinks();
3197
3198                 $s =
3199                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3200                 Xml::tags( 'livepreview', null,
3201                         Xml::element( 'preview', null, $previewText )
3202                         #.      Xml::element( 'category', null, $categories )
3203                 );
3204                 echo $s;
3205         }
3206
3207         /**
3208          * Call the stock "user is blocked" page
3209          *
3210          * @deprecated in 1.19; throw an exception directly instead
3211          */
3212         function blockedPage() {
3213                 wfDeprecated( __METHOD__, '1.19' );
3214                 global $wgUser;
3215
3216                 throw new UserBlockedError( $wgUser->getBlock() );
3217         }
3218
3219         /**
3220          * Produce the stock "please login to edit pages" page
3221          *
3222          * @deprecated in 1.19; throw an exception directly instead
3223          */
3224         function userNotLoggedInPage() {
3225                 wfDeprecated( __METHOD__, '1.19' );
3226                 throw new PermissionsError( 'edit' );
3227         }
3228
3229         /**
3230          * Show an error page saying to the user that he has insufficient permissions
3231          * to create a new page
3232          *
3233          * @deprecated in 1.19; throw an exception directly instead
3234          */
3235         function noCreatePermission() {
3236                 wfDeprecated( __METHOD__, '1.19' );
3237                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
3238                 throw new PermissionsError( $permission );
3239         }
3240
3241         /**
3242          * Creates a basic error page which informs the user that
3243          * they have attempted to edit a nonexistent section.
3244          */
3245         function noSuchSectionPage() {
3246                 global $wgOut;
3247
3248                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3249
3250                 $res = wfMsgExt( 'nosuchsectiontext', 'parse', $this->section );
3251                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
3252                 $wgOut->addHTML( $res );
3253
3254                 $wgOut->returnToMain( false, $this->mTitle );
3255         }
3256
3257         /**
3258          * Produce the stock "your edit contains spam" page
3259          *
3260          * @param $match string Text which triggered one or more filters
3261          * @deprecated since 1.17 Use method spamPageWithContent() instead
3262          */
3263         static function spamPage( $match = false ) {
3264                 wfDeprecated( __METHOD__, '1.17' );
3265
3266                 global $wgOut, $wgTitle;
3267
3268                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3269
3270                 $wgOut->addHTML( '<div id="spamprotected">' );
3271                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3272                 if ( $match ) {
3273                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3274                 }
3275                 $wgOut->addHTML( '</div>' );
3276
3277                 $wgOut->returnToMain( false, $wgTitle );
3278         }
3279
3280         /**
3281          * Show "your edit contains spam" page with your diff and text
3282          *
3283          * @param $match string|Array|bool Text (or array of texts) which triggered one or more filters
3284          */
3285         public function spamPageWithContent( $match = false ) {
3286                 global $wgOut, $wgLang;
3287                 $this->textbox2 = $this->textbox1;
3288
3289                 if( is_array( $match ) ){
3290                         $match = $wgLang->listToText( $match );
3291                 }
3292                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3293
3294                 $wgOut->addHTML( '<div id="spamprotected">' );
3295                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3296                 if ( $match ) {
3297                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3298                 }
3299                 $wgOut->addHTML( '</div>' );
3300
3301                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3302                 $this->showDiff();
3303
3304                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3305                 $this->showTextbox2();
3306
3307                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3308         }
3309
3310         /**
3311          * Format an anchor fragment as it would appear for a given section name
3312          * @param $text String
3313          * @return String
3314          * @private
3315          */
3316         function sectionAnchor( $text ) {
3317                 global $wgParser;
3318                 return $wgParser->guessSectionNameFromWikiText( $text );
3319         }
3320
3321         /**
3322          * Check if the browser is on a blacklist of user-agents known to
3323          * mangle UTF-8 data on form submission. Returns true if Unicode
3324          * should make it through, false if it's known to be a problem.
3325          * @return bool
3326          * @private
3327          */
3328         function checkUnicodeCompliantBrowser() {
3329                 global $wgBrowserBlackList;
3330                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
3331                         // No User-Agent header sent? Trust it by default...
3332                         return true;
3333                 }
3334                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
3335                 foreach ( $wgBrowserBlackList as $browser ) {
3336                         if ( preg_match( $browser, $currentbrowser ) ) {
3337                                 return false;
3338                         }
3339                 }
3340                 return true;
3341         }
3342
3343         /**
3344          * Filter an input field through a Unicode de-armoring process if it
3345          * came from an old browser with known broken Unicode editing issues.
3346          *
3347          * @param $request WebRequest
3348          * @param $field String
3349          * @return String
3350          * @private
3351          */
3352         function safeUnicodeInput( $request, $field ) {
3353                 $text = rtrim( $request->getText( $field ) );
3354                 return $request->getBool( 'safemode' )
3355                         ? $this->unmakesafe( $text )
3356                         : $text;
3357         }
3358
3359         /**
3360          * @param $request WebRequest
3361          * @param $text string
3362          * @return string
3363          */
3364         function safeUnicodeText( $request, $text ) {
3365                 $text = rtrim( $text );
3366                 return $request->getBool( 'safemode' )
3367                         ? $this->unmakesafe( $text )
3368                         : $text;
3369         }
3370
3371         /**
3372          * Filter an output field through a Unicode armoring process if it is
3373          * going to an old browser with known broken Unicode editing issues.
3374          *
3375          * @param $text String
3376          * @return String
3377          * @private
3378          */
3379         function safeUnicodeOutput( $text ) {
3380                 global $wgContLang;
3381                 $codedText = $wgContLang->recodeForEdit( $text );
3382                 return $this->checkUnicodeCompliantBrowser()
3383                         ? $codedText
3384                         : $this->makesafe( $codedText );
3385         }
3386
3387         /**
3388          * A number of web browsers are known to corrupt non-ASCII characters
3389          * in a UTF-8 text editing environment. To protect against this,
3390          * detected browsers will be served an armored version of the text,
3391          * with non-ASCII chars converted to numeric HTML character references.
3392          *
3393          * Preexisting such character references will have a 0 added to them
3394          * to ensure that round-trips do not alter the original data.
3395          *
3396          * @param $invalue String
3397          * @return String
3398          * @private
3399          */
3400         function makesafe( $invalue ) {
3401                 // Armor existing references for reversability.
3402                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
3403
3404                 $bytesleft = 0;
3405                 $result = "";
3406                 $working = 0;
3407                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3408                         $bytevalue = ord( $invalue[$i] );
3409                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
3410                                 $result .= chr( $bytevalue );
3411                                 $bytesleft = 0;
3412                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
3413                                 $working = $working << 6;
3414                                 $working += ( $bytevalue & 0x3F );
3415                                 $bytesleft--;
3416                                 if ( $bytesleft <= 0 ) {
3417                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3418                                 }
3419                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
3420                                 $working = $bytevalue & 0x1F;
3421                                 $bytesleft = 1;
3422                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
3423                                 $working = $bytevalue & 0x0F;
3424                                 $bytesleft = 2;
3425                         } else { // 1111 0xxx
3426                                 $working = $bytevalue & 0x07;
3427                                 $bytesleft = 3;
3428                         }
3429                 }
3430                 return $result;
3431         }
3432
3433         /**
3434          * Reverse the previously applied transliteration of non-ASCII characters
3435          * back to UTF-8. Used to protect data from corruption by broken web browsers
3436          * as listed in $wgBrowserBlackList.
3437          *
3438          * @param $invalue String
3439          * @return String
3440          * @private
3441          */
3442         function unmakesafe( $invalue ) {
3443                 $result = "";
3444                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3445                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
3446                                 $i += 3;
3447                                 $hexstring = "";
3448                                 do {
3449                                         $hexstring .= $invalue[$i];
3450                                         $i++;
3451                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
3452
3453                                 // Do some sanity checks. These aren't needed for reversability,
3454                                 // but should help keep the breakage down if the editor
3455                                 // breaks one of the entities whilst editing.
3456                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) and ( strlen( $hexstring ) <= 6 ) ) {
3457                                         $codepoint = hexdec( $hexstring );
3458                                         $result .= codepointToUtf8( $codepoint );
3459                                 } else {
3460                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
3461                                 }
3462                         } else {
3463                                 $result .= substr( $invalue, $i, 1 );
3464                         }
3465                 }
3466                 // reverse the transform that we made for reversability reasons.
3467                 return strtr( $result, array( "&#x0" => "&#x" ) );
3468         }
3469 }