includes/EditPage.php

   1 <?php
   2 /**
   3  * Contains the EditPage class
   4  * @file
   5  */
   6
   7 /**
   8  * The edit page/HTML interface (split from Article)
   9  * The actual database and text munging is still in Article,
  10  * but it should get easier to call those from alternate
  11  * interfaces.
  12  *
  13  * EditPage cares about two distinct titles:
  14  * $this->mContextTitle is the page that forms submit to, links point to,
  15  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  16  * page in the database that is actually being edited. These are
  17  * usually the same, but they are now allowed to be different.
  18  *
  19  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  20  * headaches, which may be fatal.
  21  */
  22 class EditPage {
  23         const AS_SUCCESS_UPDATE            = 200;
  24         const AS_SUCCESS_NEW_ARTICLE       = 201;
  25         const AS_HOOK_ERROR                = 210;
  26         const AS_FILTERING                 = 211;
  27         const AS_HOOK_ERROR_EXPECTED       = 212;
  28         const AS_BLOCKED_PAGE_FOR_USER     = 215;
  29         const AS_CONTENT_TOO_BIG           = 216;
  30         const AS_USER_CANNOT_EDIT          = 217;
  31         const AS_READ_ONLY_PAGE_ANON       = 218;
  32         const AS_READ_ONLY_PAGE_LOGGED     = 219;
  33         const AS_READ_ONLY_PAGE            = 220;
  34         const AS_RATE_LIMITED              = 221;
  35         const AS_ARTICLE_WAS_DELETED       = 222;
  36         const AS_NO_CREATE_PERMISSION      = 223;
  37         const AS_BLANK_ARTICLE             = 224;
  38         const AS_CONFLICT_DETECTED         = 225;
  39         const AS_SUMMARY_NEEDED            = 226;
  40         const AS_TEXTBOX_EMPTY             = 228;
  41         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
  42         const AS_OK                        = 230;
  43         const AS_END                       = 231;
  44         const AS_SPAM_ERROR                = 232;
  45         const AS_IMAGE_REDIRECT_ANON       = 233;
  46         const AS_IMAGE_REDIRECT_LOGGED     = 234;
  47
  48         /**
  49          * @var Article
  50          */
  51         var $mArticle;
  52
  53         /**
  54          * @var Title
  55          */
  56         var $mTitle;
  57         private $mContextTitle = null;
  58         var $action = 'submit';
  59         var $isConflict = false;
  60         var $isCssJsSubpage = false;
  61         var $isCssSubpage = false;
  62         var $isJsSubpage = false;
  63         var $isWrongCaseCssJsPage = false;
  64         var $isNew = false; // new page or new section
  65         var $deletedSinceEdit;
  66         var $formtype;
  67         var $firsttime;
  68         var $lastDelete;
  69         var $mTokenOk = false;
  70         var $mTokenOkExceptSuffix = false;
  71         var $mTriedSave = false;
  72         var $incompleteForm = false;
  73         var $tooBig = false;
  74         var $kblength = false;
  75         var $missingComment = false;
  76         var $missingSummary = false;
  77         var $allowBlankSummary = false;
  78         var $autoSumm = '';
  79         var $hookError = '';
  80         #var $mPreviewTemplates;
  81
  82         /**
  83          * @var ParserOutput
  84          */
  85         var $mParserOutput;
  86
  87         var $mBaseRevision = false;
  88         var $mShowSummaryField = true;
  89
  90         # Form values
  91         var $save = false, $preview = false, $diff = false;
  92         var $minoredit = false, $watchthis = false, $recreate = false;
  93         var $textbox1 = '', $textbox2 = '', $summary = '', $nosummary = false;
  94         var $edittime = '', $section = '', $sectiontitle = '', $starttime = '';
  95         var $oldid = 0, $editintro = '', $scrolltop = null, $bot = true;
  96
  97         # Placeholders for text injection by hooks (must be HTML)
  98         # extensions should take care to _append_ to the present value
  99         public $editFormPageTop = ''; // Before even the preview
 100         public $editFormTextTop = '';
 101         public $editFormTextBeforeContent = '';
 102         public $editFormTextAfterWarn = '';
 103         public $editFormTextAfterTools = '';
 104         public $editFormTextBottom = '';
 105         public $editFormTextAfterContent = '';
 106         public $previewTextAfterContent = '';
 107         public $mPreloadText = '';
 108
 109         /* $didSave should be set to true whenever an article was succesfully altered. */
 110         public $didSave = false;
 111         public $undidRev = 0;
 112
 113         public $suppressIntro = false;
 114
 115         /**
 116          * @todo document
 117          * @param $article Article
 118          */
 119         public function __construct( $article ) {
 120                 $this->mArticle = $article;
 121                 $this->mTitle = $article->getTitle();
 122         }
 123
 124         /**
 125          * @return Article
 126          */
 127         public function getArticle() {
 128                 return $this->mArticle;
 129         }
 130
 131         /**
 132          * @since 1.19
 133          * @return Title
 134          */
 135         public function getTitle() {
 136                 return $this->mTitle;
 137         }
 138
 139         /**
 140          * Set the context Title object
 141          *
 142          * @param $title Title object or null
 143          */
 144         public function setContextTitle( $title ) {
 145                 $this->mContextTitle = $title;
 146         }
 147
 148         /**
 149          * Get the context title object.
 150          * If not set, $wgTitle will be returned. This behavior might changed in
 151          * the future to return $this->mTitle instead.
 152          *
 153          * @return Title object
 154          */
 155         public function getContextTitle() {
 156                 if ( is_null( $this->mContextTitle ) ) {
 157                         global $wgTitle;
 158                         return $wgTitle;
 159                 } else {
 160                         return $this->mContextTitle;
 161                 }
 162         }
 163
 164         function submit() {
 165                 $this->edit();
 166         }
 167
 168         /**
 169          * This is the function that gets called for "action=edit". It
 170          * sets up various member variables, then passes execution to
 171          * another function, usually showEditForm()
 172          *
 173          * The edit form is self-submitting, so that when things like
 174          * preview and edit conflicts occur, we get the same form back
 175          * with the extra stuff added.  Only when the final submission
 176          * is made and all is well do we actually save and redirect to
 177          * the newly-edited page.
 178          */
 179         function edit() {
 180                 global $wgOut, $wgRequest, $wgUser;
 181                 // Allow extensions to modify/prevent this form or submission
 182                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 183                         return;
 184                 }
 185
 186                 wfProfileIn( __METHOD__ );
 187                 wfDebug( __METHOD__.": enter\n" );
 188
 189                 // If they used redlink=1 and the page exists, redirect to the main article
 190                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 191                         $wgOut->redirect( $this->mTitle->getFullURL() );
 192                         wfProfileOut( __METHOD__ );
 193                         return;
 194                 }
 195
 196                 $this->importFormData( $wgRequest );
 197                 $this->firsttime = false;
 198
 199                 if ( $this->live ) {
 200                         $this->livePreview();
 201                         wfProfileOut( __METHOD__ );
 202                         return;
 203                 }
 204
 205                 if ( wfReadOnly() && $this->save ) {
 206                         // Force preview
 207                         $this->save = false;
 208                         $this->preview = true;
 209                 }
 210
 211                 if ( $this->save ) {
 212                         $this->formtype = 'save';
 213                 } elseif ( $this->preview ) {
 214                         $this->formtype = 'preview';
 215                 } elseif ( $this->diff ) {
 216                         $this->formtype = 'diff';
 217                 } else { # First time through
 218                         $this->firsttime = true;
 219                         if ( $this->previewOnOpen() ) {
 220                                 $this->formtype = 'preview';
 221                         } else {
 222                                 $this->formtype = 'initial';
 223                         }
 224                 }
 225
 226                 $permErrors = $this->getEditPermissionErrors();
 227                 if ( $permErrors ) {
 228                         wfDebug( __METHOD__ . ": User can't edit\n" );
 229                         // Auto-block user's IP if the account was "hard" blocked
 230                         $wgUser->spreadAnyEditBlock();
 231
 232                         $this->displayPermissionsError( $permErrors );
 233
 234                         wfProfileOut( __METHOD__ );
 235                         return;
 236                 }
 237
 238                 $wgOut->addModules( array( 'mediawiki.action.edit' ) );
 239
 240                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
 241                         $wgOut->addModules( 'mediawiki.legacy.preview' );
 242                 }
 243                 // Bug #19334: textarea jumps when editing articles in IE8
 244                 $wgOut->addStyle( 'common/IE80Fixes.css', 'screen', 'IE 8' );
 245
 246                 wfProfileIn( __METHOD__."-business-end" );
 247
 248                 $this->isConflict = false;
 249                 // css / js subpages of user pages get a special treatment
 250                 $this->isCssJsSubpage       = $this->mTitle->isCssJsSubpage();
 251                 $this->isCssSubpage         = $this->mTitle->isCssSubpage();
 252                 $this->isJsSubpage          = $this->mTitle->isJsSubpage();
 253                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 254                 $this->isNew                = !$this->mTitle->exists() || $this->section == 'new';
 255
 256                 # Show applicable editing introductions
 257                 if ( $this->formtype == 'initial' || $this->firsttime )
 258                         $this->showIntro();
 259
 260                 if ( $this->mTitle->isTalkPage() ) {
 261                         $wgOut->addWikiMsg( 'talkpagetext' );
 262                 }
 263
 264                 # Optional notices on a per-namespace and per-page basis
 265                 $editnotice_ns   = 'editnotice-'.$this->mTitle->getNamespace();
 266                 $editnotice_ns_message = wfMessage( $editnotice_ns )->inContentLanguage();
 267                 if ( $editnotice_ns_message->exists() ) {
 268                         $wgOut->addWikiText( $editnotice_ns_message->plain() );
 269                 }
 270                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
 271                         $parts = explode( '/', $this->mTitle->getDBkey() );
 272                         $editnotice_base = $editnotice_ns;
 273                         while ( count( $parts ) > 0 ) {
 274                                 $editnotice_base .= '-'.array_shift( $parts );
 275                                 $editnotice_base_msg = wfMessage( $editnotice_base )->inContentLanguage();
 276                                 if ( $editnotice_base_msg->exists() ) {
 277                                         $wgOut->addWikiText( $editnotice_base_msg->plain()  );
 278                                 }
 279                         }
 280                 } else {
 281                         # Even if there are no subpages in namespace, we still don't want / in MW ns.
 282                         $editnoticeText = $editnotice_ns . '-' . str_replace( '/', '-', $this->mTitle->getDBkey() );
 283                         $editnoticeMsg = wfMessage( $editnoticeText )->inContentLanguage();
 284                         if ( $editnoticeMsg->exists() ) {
 285                                 $wgOut->addWikiText( $editnoticeMsg->plain() );
 286                         }
 287                 }
 288
 289                 # Attempt submission here.  This will check for edit conflicts,
 290                 # and redundantly check for locked database, blocked IPs, etc.
 291                 # that edit() already checked just in case someone tries to sneak
 292                 # in the back door with a hand-edited submission URL.
 293
 294                 if ( 'save' == $this->formtype ) {
 295                         if ( !$this->attemptSave() ) {
 296                                 wfProfileOut( __METHOD__."-business-end" );
 297                                 wfProfileOut( __METHOD__ );
 298                                 return;
 299                         }
 300                 }
 301
 302                 # First time through: get contents, set time for conflict
 303                 # checking, etc.
 304                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 305                         if ( $this->initialiseForm() === false ) {
 306                                 $this->noSuchSectionPage();
 307                                 wfProfileOut( __METHOD__."-business-end" );
 308                                 wfProfileOut( __METHOD__ );
 309                                 return;
 310                         }
 311                         if ( !$this->mTitle->getArticleId() )
 312                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 313                         else
 314                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 315                 }
 316
 317                 $this->showEditForm();
 318                 wfProfileOut( __METHOD__."-business-end" );
 319                 wfProfileOut( __METHOD__ );
 320         }
 321
 322         /**
 323          * @return array
 324          */
 325         protected function getEditPermissionErrors() {
 326                 global $wgUser;
 327                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 328                 # Can this title be created?
 329                 if ( !$this->mTitle->exists() ) {
 330                         $permErrors = array_merge( $permErrors,
 331                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 332                 }
 333                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 334                 $remove = array();
 335                 foreach( $permErrors as $error ) {
 336                         if ( ( $this->preview || $this->diff ) &&
 337                                 ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' ) )
 338                         {
 339                                 $remove[] = $error;
 340                         }
 341                 }
 342                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 343                 return $permErrors;
 344         }
 345
 346         /**
 347          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 348          * but with the following differences:
 349          * - If redlink=1, the user will be redirect to the page
 350          * - If there is content to display or the error occurs while either saving,
 351          *   previewing or showing the difference, it will be a
 352          *   "View source for ..." page displaying the source code after the error message.
 353          *
 354          * @since 1.19
 355          * @param $permErrors Array of permissions errors, as returned by
 356          *                    Title::getUserPermissionsErrors().
 357          */
 358         protected function displayPermissionsError( array $permErrors ) {
 359                 global $wgRequest, $wgOut;
 360
 361                 if ( $wgRequest->getBool( 'redlink' ) ) {
 362                         // The edit page was reached via a red link.
 363                         // Redirect to the article page and let them click the edit tab if
 364                         // they really want a permission error.
 365                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 366                         return;
 367                 }
 368
 369                 $content = $this->getContent();
 370
 371                 # Use the normal message if there's nothing to display
 372                 if ( $this->firsttime && $content === '' ) {
 373                         $action = $this->mTitle->exists() ? 'edit' :
 374                                 ( $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 375                         throw new PermissionsError( $action, $permErrors );
 376                 }
 377
 378                 $wgOut->setPageTitle( wfMessage( 'viewsource-title', $this->getContextTitle()->getPrefixedText() ) );
 379                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 380                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 381                 $wgOut->addHTML( "<hr />\n" );
 382
 383                 # If the user made changes, preserve them when showing the markup
 384                 # (This happens when a user is blocked during edit, for instance)
 385                 if ( !$this->firsttime ) {
 386                         $content = $this->textbox1;
 387                         $wgOut->addWikiMsg( 'viewyourtext' );
 388                 } else {
 389                         $wgOut->addWikiMsg( 'viewsourcetext' );
 390                 }
 391
 392                 $this->showTextbox( $content, 'wpTextbox1', array( 'readonly' ) );
 393
 394                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 395                         Linker::formatTemplates( $this->getTemplates() ) ) );
 396
 397                 if ( $this->mTitle->exists() ) {
 398                         $wgOut->returnToMain( null, $this->mTitle );
 399                 }
 400         }
 401
 402         /**
 403          * Show a read-only error
 404          * Parameters are the same as OutputPage:readOnlyPage()
 405          * Redirect to the article page if redlink=1
 406          * @deprecated in 1.19; use displayPermissionsError() instead
 407          */
 408         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 409                 wfDeprecated( __METHOD__, '1.19' );
 410
 411                 global $wgRequest, $wgOut;
 412                 if ( $wgRequest->getBool( 'redlink' ) ) {
 413                         // The edit page was reached via a red link.
 414                         // Redirect to the article page and let them click the edit tab if
 415                         // they really want a permission error.
 416                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 417                 } else {
 418                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 419                 }
 420         }
 421
 422         /**
 423          * Should we show a preview when the edit form is first shown?
 424          *
 425          * @return bool
 426          */
 427         protected function previewOnOpen() {
 428                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 429                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 430                         // Explicit override from request
 431                         return true;
 432                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 433                         // Explicit override from request
 434                         return false;
 435                 } elseif ( $this->section == 'new' ) {
 436                         // Nothing *to* preview for new sections
 437                         return false;
 438                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 439                         // Standard preference behaviour
 440                         return true;
 441                 } elseif ( !$this->mTitle->exists() &&
 442                   isset($wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]) &&
 443                   $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 444                 {
 445                         // Categories are special
 446                         return true;
 447                 } else {
 448                         return false;
 449                 }
 450         }
 451
 452         /**
 453          * Checks whether the user entered a skin name in uppercase,
 454          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 455          *
 456          * @return bool
 457          */
 458         protected function isWrongCaseCssJsPage() {
 459                 if( $this->mTitle->isCssJsSubpage() ) {
 460                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 461                         $skins = array_merge(
 462                                 array_keys( Skin::getSkinNames() ),
 463                                 array( 'common' )
 464                         );
 465                         return !in_array( $name, $skins )
 466                                 && in_array( strtolower( $name ), $skins );
 467                 } else {
 468                         return false;
 469                 }
 470         }
 471
 472         /**
 473          * Does this EditPage class support section editing?
 474          * This is used by EditPage subclasses to indicate their ui cannot handle section edits
 475          *
 476          * @return bool
 477          */
 478         protected function isSectionEditSupported() {
 479                 return true;
 480         }
 481
 482         /**
 483          * This function collects the form data and uses it to populate various member variables.
 484          * @param $request WebRequest
 485          */
 486         function importFormData( &$request ) {
 487                 global $wgLang, $wgUser;
 488
 489                 wfProfileIn( __METHOD__ );
 490
 491                 # Section edit can come from either the form or a link
 492                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 493
 494                 if ( $request->wasPosted() ) {
 495                         # These fields need to be checked for encoding.
 496                         # Also remove trailing whitespace, but don't remove _initial_
 497                         # whitespace from the text boxes. This may be significant formatting.
 498                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 499                         if ( !$request->getCheck('wpTextbox2') ) {
 500                                 // Skip this if wpTextbox2 has input, it indicates that we came
 501                                 // from a conflict page with raw page text, not a custom form
 502                                 // modified by subclasses
 503                                 wfProfileIn( get_class($this)."::importContentFormData" );
 504                                 $textbox1 = $this->importContentFormData( $request );
 505                                 if ( isset($textbox1) )
 506                                         $this->textbox1 = $textbox1;
 507                                 wfProfileOut( get_class($this)."::importContentFormData" );
 508                         }
 509
 510                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 511                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary' ), 250 );
 512
 513                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 514                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 515                         # section titles.
 516                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 517
 518                         # Treat sectiontitle the same way as summary.
 519                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 520                         # currently doing double duty as both edit summary and section title. Right now this
 521                         # is just to allow API edits to work around this limitation, but this should be
 522                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 523                         $this->sectiontitle = $wgLang->truncate( $request->getText( 'wpSectionTitle' ), 250 );
 524                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 525
 526                         $this->edittime = $request->getVal( 'wpEdittime' );
 527                         $this->starttime = $request->getVal( 'wpStarttime' );
 528
 529                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 530
 531                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 532                                 // wpTextbox1 field is missing, possibly due to being "too big"
 533                                 // according to some filter rules such as Suhosin's setting for
 534                                 // suhosin.request.max_value_length (d'oh)
 535                                 $this->incompleteForm = true;
 536                         } else {
 537                                 // edittime should be one of our last fields; if it's missing,
 538                                 // the submission probably broke somewhere in the middle.
 539                                 $this->incompleteForm = is_null( $this->edittime );
 540                         }
 541                         if ( $this->incompleteForm ) {
 542                                 # If the form is incomplete, force to preview.
 543                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 544                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 545                                 $this->preview = true;
 546                         } else {
 547                                 /* Fallback for live preview */
 548                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 549                                 $this->diff = $request->getCheck( 'wpDiff' );
 550
 551                                 // Remember whether a save was requested, so we can indicate
 552                                 // if we forced preview due to session failure.
 553                                 $this->mTriedSave = !$this->preview;
 554
 555                                 if ( $this->tokenOk( $request ) ) {
 556                                         # Some browsers will not report any submit button
 557                                         # if the user hits enter in the comment box.
 558                                         # The unmarked state will be assumed to be a save,
 559                                         # if the form seems otherwise complete.
 560                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 561                                 } elseif ( $this->diff ) {
 562                                         # Failed token check, but only requested "Show Changes".
 563                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 564                                 } else {
 565                                         # Page might be a hack attempt posted from
 566                                         # an external site. Preview instead of saving.
 567                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 568                                         $this->preview = true;
 569                                 }
 570                         }
 571                         $this->save = !$this->preview && !$this->diff;
 572                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 573                                 $this->edittime = null;
 574                         }
 575
 576                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 577                                 $this->starttime = null;
 578                         }
 579
 580                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 581
 582                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 583                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 584
 585                         # Don't force edit summaries when a user is editing their own user or talk page
 586                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 587                                 $this->mTitle->getText() == $wgUser->getName() )
 588                         {
 589                                 $this->allowBlankSummary = true;
 590                         } else {
 591                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary');
 592                         }
 593
 594                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 595                 } else {
 596                         # Not a posted form? Start with nothing.
 597                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 598                         $this->textbox1     = '';
 599                         $this->summary      = '';
 600                         $this->sectiontitle = '';
 601                         $this->edittime     = '';
 602                         $this->starttime    = wfTimestampNow();
 603                         $this->edit         = false;
 604                         $this->preview      = false;
 605                         $this->save         = false;
 606                         $this->diff         = false;
 607                         $this->minoredit    = false;
 608                         $this->watchthis    = $request->getBool( 'watchthis', false ); // Watch may be overriden by request parameters
 609                         $this->recreate     = false;
 610
 611                         // When creating a new section, we can preload a section title by passing it as the
 612                         // preloadtitle parameter in the URL (Bug 13100)
 613                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 614                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 615                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 616                                 $this->summary = $request->getVal( 'preloadtitle' );
 617                         }
 618                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 619                                 $this->summary = $request->getText( 'summary' );
 620                         }
 621
 622                         if ( $request->getVal( 'minor' ) ) {
 623                                 $this->minoredit = true;
 624                         }
 625                 }
 626
 627                 $this->bot = $request->getBool( 'bot', true );
 628                 $this->nosummary = $request->getBool( 'nosummary' );
 629
 630                 // @todo FIXME: Unused variable?
 631                 $this->oldid = $request->getInt( 'oldid' );
 632
 633                 $this->live = $request->getCheck( 'live' );
 634                 $this->editintro = $request->getText( 'editintro',
 635                         // Custom edit intro for new sections
 636                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 637
 638                 // Allow extensions to modify form data
 639                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 640
 641                 wfProfileOut( __METHOD__ );
 642         }
 643
 644         /**
 645          * Subpage overridable method for extracting the page content data from the
 646          * posted form to be placed in $this->textbox1, if using customized input
 647          * this method should be overrided and return the page text that will be used
 648          * for saving, preview parsing and so on...
 649          *
 650          * @param $request WebRequest
 651          */
 652         protected function importContentFormData( &$request ) {
 653                 return; // Don't do anything, EditPage already extracted wpTextbox1
 654         }
 655
 656         /**
 657          * Initialise form fields in the object
 658          * Called on the first invocation, e.g. when a user clicks an edit link
 659          * @return bool -- if the requested section is valid
 660          */
 661         function initialiseForm() {
 662                 global $wgUser;
 663                 $this->edittime = $this->mArticle->getTimestamp();
 664                 $this->textbox1 = $this->getContent( false );
 665                 // activate checkboxes if user wants them to be always active
 666                 # Sort out the "watch" checkbox
 667                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 668                         # Watch all edits
 669                         $this->watchthis = true;
 670                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 671                         # Watch creations
 672                         $this->watchthis = true;
 673                 } elseif ( $this->mTitle->userIsWatching() ) {
 674                         # Already watched
 675                         $this->watchthis = true;
 676                 }
 677                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 678                         $this->minoredit = true;
 679                 }
 680                 if ( $this->textbox1 === false ) {
 681                         return false;
 682                 }
 683                 wfProxyCheck();
 684                 return true;
 685         }
 686
 687         /**
 688          * Fetch initial editing page content.
 689          *
 690          * @param $def_text string
 691          * @return mixed string on success, $def_text for invalid sections
 692          * @private
 693          */
 694         function getContent( $def_text = '' ) {
 695                 global $wgOut, $wgRequest, $wgParser;
 696
 697                 wfProfileIn( __METHOD__ );
 698                 # Get variables from query string :P
 699                 $section = $wgRequest->getVal( 'section' );
 700
 701                 $preload = $wgRequest->getVal( 'preload',
 702                         // Custom preload text for new sections
 703                         $section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 704                 $undoafter = $wgRequest->getVal( 'undoafter' );
 705                 $undo = $wgRequest->getVal( 'undo' );
 706
 707                 // For message page not locally set, use the i18n message.
 708                 // For other non-existent articles, use preload text if any.
 709                 if ( !$this->mTitle->exists() ) {
 710                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 711                                 # If this is a system message, get the default text.
 712                                 $text = $this->mTitle->getDefaultMessageText();
 713                                 if( $text === false ) {
 714                                         $text = $this->getPreloadedText( $preload );
 715                                 }
 716                         } else {
 717                                 # If requested, preload some text.
 718                                 $text = $this->getPreloadedText( $preload );
 719                         }
 720                 // For existing pages, get text based on "undo" or section parameters.
 721                 } else {
 722                         $text = $this->mArticle->getContent();
 723                         if ( $undo > 0 && $undoafter > 0 && $undo < $undoafter ) {
 724                                 # If they got undoafter and undo round the wrong way, switch them
 725                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 726                         }
 727                         if ( $undo > 0 && $undo > $undoafter ) {
 728                                 # Undoing a specific edit overrides section editing; section-editing
 729                                 # doesn't work with undoing.
 730                                 if ( $undoafter ) {
 731                                         $undorev = Revision::newFromId( $undo );
 732                                         $oldrev = Revision::newFromId( $undoafter );
 733                                 } else {
 734                                         $undorev = Revision::newFromId( $undo );
 735                                         $oldrev = $undorev ? $undorev->getPrevious() : null;
 736                                 }
 737
 738                                 # Sanity check, make sure it's the right page,
 739                                 # the revisions exist and they were not deleted.
 740                                 # Otherwise, $text will be left as-is.
 741                                 if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 742                                         $undorev->getPage() == $oldrev->getPage() &&
 743                                         $undorev->getPage() == $this->mArticle->getID() &&
 744                                         !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 745                                         !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 746
 747                                         $undotext = $this->mArticle->getUndoText( $undorev, $oldrev );
 748                                         if ( $undotext === false ) {
 749                                                 # Warn the user that something went wrong
 750                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-failure">' .
 751                                                         wfMsgNoTrans( 'undo-failure' ) . '</div>', true, /* interface */true );
 752                                         } else {
 753                                                 $text = $undotext;
 754                                                 # Inform the user of our success and set an automatic edit summary
 755                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="mw-undo-success">' .
 756                                                         wfMsgNoTrans( 'undo-success' ) . '</div>', true, /* interface */true );
 757                                                 $firstrev = $oldrev->getNext();
 758                                                 # If we just undid one rev, use an autosummary
 759                                                 if ( $firstrev->getId() == $undo ) {
 760                                                         $undoSummary = wfMsgForContent( 'undo-summary', $undo, $undorev->getUserText() );
 761                                                         if ( $this->summary === '' ) {
 762                                                                 $this->summary = $undoSummary;
 763                                                         } else {
 764                                                                 $this->summary = $undoSummary . wfMsgForContent( 'colon-separator' ) . $this->summary;
 765                                                         }
 766                                                         $this->undidRev = $undo;
 767                                                 }
 768                                                 $this->formtype = 'diff';
 769                                         }
 770                                 } else {
 771                                         // Failed basic sanity checks.
 772                                         // Older revisions may have been removed since the link
 773                                         // was created, or we may simply have got bogus input.
 774                                         $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-norev">' .
 775                                                 wfMsgNoTrans( 'undo-norev' ) . '</div>', true, /* interface */true );
 776                                 }
 777                         } elseif ( $section != '' ) {
 778                                 if ( $section == 'new' ) {
 779                                         $text = $this->getPreloadedText( $preload );
 780                                 } else {
 781                                         // Get section edit text (returns $def_text for invalid sections)
 782                                         $text = $wgParser->getSection( $text, $section, $def_text );
 783                                 }
 784                         }
 785                 }
 786
 787                 wfProfileOut( __METHOD__ );
 788                 return $text;
 789         }
 790
 791         /**
 792          * Use this method before edit() to preload some text into the edit box
 793          *
 794          * @param $text string
 795          */
 796         public function setPreloadedText( $text ) {
 797                 $this->mPreloadText = $text;
 798         }
 799
 800         /**
 801          * Get the contents to be preloaded into the box, either set by
 802          * an earlier setPreloadText() or by loading the given page.
 803          *
 804          * @param $preload String: representing the title to preload from.
 805          * @return String
 806          */
 807         protected function getPreloadedText( $preload ) {
 808                 global $wgUser, $wgParser;
 809
 810                 if ( !empty( $this->mPreloadText ) ) {
 811                         return $this->mPreloadText;
 812                 }
 813
 814                 if ( $preload === '' ) {
 815                         return '';
 816                 }
 817
 818                 $title = Title::newFromText( $preload );
 819                 # Check for existence to avoid getting MediaWiki:Noarticletext
 820                 if ( $title === null || !$title->exists() || !$title->userCan( 'read' ) ) {
 821                         return '';
 822                 }
 823
 824                 $page = WikiPage::factory( $title );
 825                 if ( $page->isRedirect() ) {
 826                         $title = $page->getRedirectTarget();
 827                         # Same as before
 828                         if ( $title === null || !$title->exists() || !$title->userCan( 'read' ) ) {
 829                                 return '';
 830                         }
 831                         $page = WikiPage::factory( $title );
 832                 }
 833
 834                 $parserOptions = ParserOptions::newFromUser( $wgUser );
 835                 return $wgParser->getPreloadText( $page->getRawText(), $title, $parserOptions );
 836         }
 837
 838         /**
 839          * Make sure the form isn't faking a user's credentials.
 840          *
 841          * @param $request WebRequest
 842          * @return bool
 843          * @private
 844          */
 845         function tokenOk( &$request ) {
 846                 global $wgUser;
 847                 $token = $request->getVal( 'wpEditToken' );
 848                 $this->mTokenOk = $wgUser->matchEditToken( $token );
 849                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
 850                 return $this->mTokenOk;
 851         }
 852
 853         /**
 854          * Attempt submission
 855          * @return bool false if output is done, true if the rest of the form should be displayed
 856          */
 857         function attemptSave() {
 858                 global $wgUser, $wgOut;
 859
 860                 $resultDetails = false;
 861                 # Allow bots to exempt some edits from bot flagging
 862                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
 863                 $status = $this->internalAttemptSave( $resultDetails, $bot );
 864                 // FIXME: once the interface for internalAttemptSave() is made nicer, this should use the message in $status
 865
 866                 if ( $status->value == self::AS_SUCCESS_UPDATE || $status->value == self::AS_SUCCESS_NEW_ARTICLE ) {
 867                         $this->didSave = true;
 868                 }
 869
 870                 switch ( $status->value ) {
 871                         case self::AS_HOOK_ERROR_EXPECTED:
 872                         case self::AS_CONTENT_TOO_BIG:
 873                         case self::AS_ARTICLE_WAS_DELETED:
 874                         case self::AS_CONFLICT_DETECTED:
 875                         case self::AS_SUMMARY_NEEDED:
 876                         case self::AS_TEXTBOX_EMPTY:
 877                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
 878                         case self::AS_END:
 879                                 return true;
 880
 881                         case self::AS_HOOK_ERROR:
 882                         case self::AS_FILTERING:
 883                                 return false;
 884
 885                         case self::AS_SUCCESS_NEW_ARTICLE:
 886                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
 887                                 $anchor = isset ( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
 888                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
 889                                 return false;
 890
 891                         case self::AS_SUCCESS_UPDATE:
 892                                 $extraQuery = '';
 893                                 $sectionanchor = $resultDetails['sectionanchor'];
 894
 895                                 // Give extensions a chance to modify URL query on update
 896                                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this->mArticle, &$sectionanchor, &$extraQuery ) );
 897
 898                                 if ( $resultDetails['redirect'] ) {
 899                                         if ( $extraQuery == '' ) {
 900                                                 $extraQuery = 'redirect=no';
 901                                         } else {
 902                                                 $extraQuery = 'redirect=no&' . $extraQuery;
 903                                         }
 904                                 }
 905                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
 906                                 return false;
 907
 908                         case self::AS_BLANK_ARTICLE:
 909                                 $wgOut->redirect( $this->getContextTitle()->getFullURL() );
 910                                 return false;
 911
 912                         case self::AS_SPAM_ERROR:
 913                                 $this->spamPageWithContent( $resultDetails['spam'] );
 914                                 return false;
 915
 916                         case self::AS_BLOCKED_PAGE_FOR_USER:
 917                                 throw new UserBlockedError( $wgUser->mBlock );
 918
 919                         case self::AS_IMAGE_REDIRECT_ANON:
 920                         case self::AS_IMAGE_REDIRECT_LOGGED:
 921                                 throw new PermissionsError( 'upload' );
 922
 923                         case self::AS_READ_ONLY_PAGE_ANON:
 924                         case self::AS_READ_ONLY_PAGE_LOGGED:
 925                                 throw new PermissionsError( 'edit' );
 926
 927                         case self::AS_READ_ONLY_PAGE:
 928                                 throw new ReadOnlyError;
 929
 930                         case self::AS_RATE_LIMITED:
 931                                 throw new ThrottledError();
 932
 933                         case self::AS_NO_CREATE_PERMISSION:
 934                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
 935                                 throw new PermissionsError( $permission );
 936
 937                 }
 938                 return false;
 939         }
 940
 941         /**
 942          * Attempt submission (no UI)
 943          *
 944          * @param $result
 945          * @param $bot bool
 946          *
 947          * @return Status object, possibly with a message, but always with one of the AS_* constants in $status->value,
 948          *
 949          * FIXME: This interface is TERRIBLE, but hard to get rid of due to various error display idiosyncrasies. There are
 950          * also lots of cases where error metadata is set in the object and retrieved later instead of being returned, e.g.
 951          * AS_CONTENT_TOO_BIG and AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some time.
 952          */
 953         function internalAttemptSave( &$result, $bot = false ) {
 954                 global $wgFilterCallback, $wgUser, $wgRequest, $wgParser;
 955                 global $wgMaxArticleSize;
 956
 957                 $status = Status::newGood();
 958
 959                 wfProfileIn( __METHOD__  );
 960                 wfProfileIn( __METHOD__ . '-checks' );
 961
 962                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
 963                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
 964                         $status->fatal( 'hookaborted' );
 965                         $status->value = self::AS_HOOK_ERROR;
 966                         wfProfileOut( __METHOD__ . '-checks' );
 967                         wfProfileOut( __METHOD__  );
 968                         return $status;
 969                 }
 970
 971                 # Check image redirect
 972                 if ( $this->mTitle->getNamespace() == NS_FILE &&
 973                         Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
 974                         !$wgUser->isAllowed( 'upload' ) ) {
 975                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
 976                                 $status->setResult( false, $code );
 977
 978                                 wfProfileOut( __METHOD__ . '-checks' );
 979                                 wfProfileOut( __METHOD__  );
 980
 981                                 return $status;
 982                 }
 983
 984                 # Check for spam
 985                 $match = self::matchSummarySpamRegex( $this->summary );
 986                 if ( $match === false ) {
 987                         $match = self::matchSpamRegex( $this->textbox1 );
 988                 }
 989                 if ( $match !== false ) {
 990                         $result['spam'] = $match;
 991                         $ip = $wgRequest->getIP();
 992                         $pdbk = $this->mTitle->getPrefixedDBkey();
 993                         $match = str_replace( "\n", '', $match );
 994                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
 995                         $status->fatal( 'spamprotectionmatch', $match );
 996                         $status->value = self::AS_SPAM_ERROR;
 997                         wfProfileOut( __METHOD__ . '-checks' );
 998                         wfProfileOut( __METHOD__ );
 999                         return $status;
1000                 }
1001                 if ( $wgFilterCallback && is_callable( $wgFilterCallback ) && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
1002                         # Error messages or other handling should be performed by the filter function
1003                         $status->setResult( false, self::AS_FILTERING );
1004                         wfProfileOut( __METHOD__ . '-checks' );
1005                         wfProfileOut( __METHOD__ );
1006                         return $status;
1007                 }
1008                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
1009                         # Error messages etc. could be handled within the hook...
1010                         $status->fatal( 'hookaborted' );
1011                         $status->value = self::AS_HOOK_ERROR;
1012                         wfProfileOut( __METHOD__ . '-checks' );
1013                         wfProfileOut( __METHOD__ );
1014                         return $status;
1015                 } elseif ( $this->hookError != '' ) {
1016                         # ...or the hook could be expecting us to produce an error
1017                         $status->fatal( 'hookaborted' );
1018                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1019                         wfProfileOut( __METHOD__ . '-checks' );
1020                         wfProfileOut( __METHOD__ );
1021                         return $status;
1022                 }
1023
1024                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1025                         // Auto-block user's IP if the account was "hard" blocked
1026                         $wgUser->spreadAnyEditBlock();
1027                         # Check block state against master, thus 'false'.
1028                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1029                         wfProfileOut( __METHOD__ . '-checks' );
1030                         wfProfileOut( __METHOD__ );
1031                         return $status;
1032                 }
1033
1034                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1035                 if ( $this->kblength > $wgMaxArticleSize ) {
1036                         // Error will be displayed by showEditForm()
1037                         $this->tooBig = true;
1038                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1039                         wfProfileOut( __METHOD__ . '-checks' );
1040                         wfProfileOut( __METHOD__ );
1041                         return $status;
1042                 }
1043
1044                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1045                         if ( $wgUser->isAnon() ) {
1046                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1047                                 wfProfileOut( __METHOD__ . '-checks' );
1048                                 wfProfileOut( __METHOD__ );
1049                                 return $status;
1050                         } else {
1051                                 $status->fatal( 'readonlytext' );
1052                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1053                                 wfProfileOut( __METHOD__ . '-checks' );
1054                                 wfProfileOut( __METHOD__ );
1055                                 return $status;
1056                         }
1057                 }
1058
1059                 if ( wfReadOnly() ) {
1060                         $status->fatal( 'readonlytext' );
1061                         $status->value = self::AS_READ_ONLY_PAGE;
1062                         wfProfileOut( __METHOD__ . '-checks' );
1063                         wfProfileOut( __METHOD__ );
1064                         return $status;
1065                 }
1066                 if ( $wgUser->pingLimiter() ) {
1067                         $status->fatal( 'actionthrottledtext' );
1068                         $status->value = self::AS_RATE_LIMITED;
1069                         wfProfileOut( __METHOD__ . '-checks' );
1070                         wfProfileOut( __METHOD__ );
1071                         return $status;
1072                 }
1073
1074                 # If the article has been deleted while editing, don't save it without
1075                 # confirmation
1076                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1077                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1078                         wfProfileOut( __METHOD__ . '-checks' );
1079                         wfProfileOut( __METHOD__ );
1080                         return $status;
1081                 }
1082
1083                 wfProfileOut( __METHOD__ . '-checks' );
1084
1085                 # If article is new, insert it.
1086                 $aid = $this->mTitle->getArticleID( Title::GAID_FOR_UPDATE );
1087                 $new = ( $aid == 0 );
1088
1089                 if ( $new ) {
1090                         // Late check for create permission, just in case *PARANOIA*
1091                         if ( !$this->mTitle->userCan( 'create' ) ) {
1092                                 $status->fatal( 'nocreatetext' );
1093                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1094                                 wfDebug( __METHOD__ . ": no create permission\n" );
1095                                 wfProfileOut( __METHOD__ );
1096                                 return $status;
1097                         }
1098
1099                         # Don't save a new article if it's blank.
1100                         if ( $this->textbox1 == '' ) {
1101                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1102                                 wfProfileOut( __METHOD__ );
1103                                 return $status;
1104                         }
1105
1106                         // Run post-section-merge edit filter
1107                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
1108                                 # Error messages etc. could be handled within the hook...
1109                                 $status->fatal( 'hookaborted' );
1110                                 $status->value = self::AS_HOOK_ERROR;
1111                                 wfProfileOut( __METHOD__ );
1112                                 return $status;
1113                         } elseif ( $this->hookError != '' ) {
1114                                 # ...or the hook could be expecting us to produce an error
1115                                 $status->fatal( 'hookaborted' );
1116                                 $status->value = self::AS_HOOK_ERROR_EXPECTED;
1117                                 wfProfileOut( __METHOD__ );
1118                                 return $status;
1119                         }
1120
1121                         # Handle the user preference to force summaries here. Check if it's not a redirect.
1122                         if ( !$this->allowBlankSummary && !Title::newFromRedirect( $this->textbox1 ) ) {
1123                                 if ( md5( $this->summary ) == $this->autoSumm ) {
1124                                         $this->missingSummary = true;
1125                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1126                                         $status->value = self::AS_SUMMARY_NEEDED;
1127                                         wfProfileOut( __METHOD__ );
1128                                         return $status;
1129                                 }
1130                         }
1131
1132                         $text = $this->textbox1;
1133                         $result['sectionanchor'] = '';
1134                         if ( $this->section == 'new' ) {
1135                                 if ( $this->sectiontitle !== '' ) {
1136                                         // Insert the section title above the content.
1137                                         $text = wfMsgForContent( 'newsectionheaderdefaultlevel', $this->sectiontitle ) . "\n\n" . $text;
1138
1139                                         // Jump to the new section
1140                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1141
1142                                         // If no edit summary was specified, create one automatically from the section
1143                                         // title and have it link to the new section. Otherwise, respect the summary as
1144                                         // passed.
1145                                         if ( $this->summary === '' ) {
1146                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1147                                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSectionTitle );
1148                                         }
1149                                 } elseif ( $this->summary !== '' ) {
1150                                         // Insert the section title above the content.
1151                                         $text = wfMsgForContent( 'newsectionheaderdefaultlevel', $this->summary ) . "\n\n" . $text;
1152
1153                                         // Jump to the new section
1154                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1155
1156                                         // Create a link to the new section from the edit summary.
1157                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1158                                         $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1159                                 }
1160                         }
1161
1162                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1163
1164                 } else {
1165
1166                         # Article exists. Check for edit conflict.
1167
1168                         $this->mArticle->clear(); # Force reload of dates, etc.
1169
1170                         wfDebug( "timestamp: {$this->mArticle->getTimestamp()}, edittime: {$this->edittime}\n" );
1171
1172                         if ( $this->mArticle->getTimestamp() != $this->edittime ) {
1173                                 $this->isConflict = true;
1174                                 if ( $this->section == 'new' ) {
1175                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1176                                                 $this->mArticle->getComment() == $this->summary ) {
1177                                                 // Probably a duplicate submission of a new comment.
1178                                                 // This can happen when squid resends a request after
1179                                                 // a timeout but the first one actually went through.
1180                                                 wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
1181                                         } else {
1182                                                 // New comment; suppress conflict.
1183                                                 $this->isConflict = false;
1184                                                 wfDebug( __METHOD__ .": conflict suppressed; new section\n" );
1185                                         }
1186                                 } elseif ( $this->section == '' && $this->userWasLastToEdit( $wgUser->getId(), $this->edittime ) ) {
1187                                         # Suppress edit conflict with self, except for section edits where merging is required.
1188                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1189                                         $this->isConflict = false;
1190                                 }
1191                         }
1192
1193                         // If sectiontitle is set, use it, otherwise use the summary as the section title (for
1194                         // backwards compatibility with old forms/bots).
1195                         if ( $this->sectiontitle !== '' ) {
1196                                 $sectionTitle = $this->sectiontitle;
1197                         } else {
1198                                 $sectionTitle = $this->summary;
1199                         }
1200
1201                         if ( $this->isConflict ) {
1202                                 wfDebug( __METHOD__ . ": conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
1203                                         $this->mArticle->getTimestamp() . "')\n" );
1204                                 $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $sectionTitle, $this->edittime );
1205                         } else {
1206                                 wfDebug( __METHOD__ . ": getting section '$this->section'\n" );
1207                                 $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $sectionTitle );
1208                         }
1209                         if ( is_null( $text ) ) {
1210                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1211                                 $this->isConflict = true;
1212                                 $text = $this->textbox1; // do not try to merge here!
1213                         } elseif ( $this->isConflict ) {
1214                                 # Attempt merge
1215                                 if ( $this->mergeChangesInto( $text ) ) {
1216                                         // Successful merge! Maybe we should tell the user the good news?
1217                                         $this->isConflict = false;
1218                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1219                                 } else {
1220                                         $this->section = '';
1221                                         $this->textbox1 = $text;
1222                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1223                                 }
1224                         }
1225
1226                         if ( $this->isConflict ) {
1227                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1228                                 wfProfileOut( __METHOD__ );
1229                                 return $status;
1230                         }
1231
1232                         // Run post-section-merge edit filter
1233                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$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__ );
1238                                 return $status;
1239                         } elseif ( $this->hookError != '' ) {
1240                                 # ...or the hook could be expecting us to produce an error
1241                                 $status->fatal( 'hookaborted' );
1242                                 $status->value = self::AS_HOOK_ERROR_EXPECTED;
1243                                 wfProfileOut( __METHOD__ );
1244                                 return $status;
1245                         }
1246
1247                         # Handle the user preference to force summaries here, but not for null edits
1248                         if ( $this->section != 'new' && !$this->allowBlankSummary
1249                                 && 0 != strcmp( $this->mArticle->getContent(), $text )
1250                                 && !Title::newFromRedirect( $text ) ) # check if it's not a redirect
1251                         {
1252                                 if ( md5( $this->summary ) == $this->autoSumm ) {
1253                                         $this->missingSummary = true;
1254                                         $status->fatal( 'missingsummary' );
1255                                         $status->value = self::AS_SUMMARY_NEEDED;
1256                                         wfProfileOut( __METHOD__ );
1257                                         return $status;
1258                                 }
1259                         }
1260
1261                         # And a similar thing for new sections
1262                         if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1263                                 if ( trim( $this->summary ) == '' ) {
1264                                         $this->missingSummary = true;
1265                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1266                                         $status->value = self::AS_SUMMARY_NEEDED;
1267                                         wfProfileOut( __METHOD__ );
1268                                         return $status;
1269                                 }
1270                         }
1271
1272                         # All's well
1273                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1274                         $sectionanchor = '';
1275                         if ( $this->section == 'new' ) {
1276                                 if ( $this->textbox1 == '' ) {
1277                                         $this->missingComment = true;
1278                                         $status->fatal( 'missingcommenttext' );
1279                                         $status->value = self::AS_TEXTBOX_EMPTY;
1280                                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1281                                         wfProfileOut( __METHOD__ );
1282                                         return $status;
1283                                 }
1284                                 if ( $this->sectiontitle !== '' ) {
1285                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1286                                         // If no edit summary was specified, create one automatically from the section
1287                                         // title and have it link to the new section. Otherwise, respect the summary as
1288                                         // passed.
1289                                         if ( $this->summary === '' ) {
1290                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1291                                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSectionTitle );
1292                                         }
1293                                 } elseif ( $this->summary !== '' ) {
1294                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1295                                         # This is a new section, so create a link to the new section
1296                                         # in the revision summary.
1297                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1298                                         $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1299                                 }
1300                         } elseif ( $this->section != '' ) {
1301                                 # Try to get a section anchor from the section source, redirect to edited section if header found
1302                                 # XXX: might be better to integrate this into Article::replaceSection
1303                                 # for duplicate heading checking and maybe parsing
1304                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1305                                 # we can't deal with anchors, includes, html etc in the header for now,
1306                                 # headline would need to be parsed to improve this
1307                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1308                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1309                                 }
1310                         }
1311                         $result['sectionanchor'] = $sectionanchor;
1312                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1313
1314                         // Save errors may fall down to the edit form, but we've now
1315                         // merged the section into full text. Clear the section field
1316                         // so that later submission of conflict forms won't try to
1317                         // replace that into a duplicated mess.
1318                         $this->textbox1 = $text;
1319                         $this->section = '';
1320
1321                         $status->value = self::AS_SUCCESS_UPDATE;
1322                 }
1323
1324                 // Check for length errors again now that the section is merged in
1325                 $this->kblength = (int)( strlen( $text ) / 1024 );
1326                 if ( $this->kblength > $wgMaxArticleSize ) {
1327                         $this->tooBig = true;
1328                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1329                         wfProfileOut( __METHOD__ );
1330                         return $status;
1331                 }
1332
1333                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1334                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1335                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1336                         ( $bot ? EDIT_FORCE_BOT : 0 );
1337
1338                 $doEditStatus = $this->mArticle->doEdit( $text, $this->summary, $flags );
1339
1340                 if ( $doEditStatus->isOK() ) {
1341                         $result['redirect'] = Title::newFromRedirect( $text ) !== null;
1342                         $this->commitWatch();
1343                         wfProfileOut( __METHOD__ );
1344                         return $status;
1345                 } else {
1346                         $this->isConflict = true;
1347                         $doEditStatus->value = self::AS_END; // Destroys data doEdit() put in $status->value but who cares
1348                         wfProfileOut( __METHOD__ );
1349                         return $doEditStatus;
1350                 }
1351         }
1352
1353         /**
1354          * Commit the change of watch status
1355          */
1356         protected function commitWatch() {
1357                 global $wgUser;
1358                 if ( $this->watchthis xor $this->mTitle->userIsWatching() ) {
1359                         $dbw = wfGetDB( DB_MASTER );
1360                         $dbw->begin();
1361                         if ( $this->watchthis ) {
1362                                 WatchAction::doWatch( $this->mTitle, $wgUser );
1363                         } else {
1364                                 WatchAction::doUnwatch( $this->mTitle, $wgUser );
1365                         }
1366                         $dbw->commit();
1367                 }
1368         }
1369
1370         /**
1371          * Check if no edits were made by other users since
1372          * the time a user started editing the page. Limit to
1373          * 50 revisions for the sake of performance.
1374          *
1375          * @param $id int
1376          * @param $edittime string
1377          *
1378          * @return bool
1379          */
1380         protected function userWasLastToEdit( $id, $edittime ) {
1381                 if( !$id ) return false;
1382                 $dbw = wfGetDB( DB_MASTER );
1383                 $res = $dbw->select( 'revision',
1384                         'rev_user',
1385                         array(
1386                                 'rev_page' => $this->mArticle->getId(),
1387                                 'rev_timestamp > '.$dbw->addQuotes( $dbw->timestamp($edittime) )
1388                         ),
1389                         __METHOD__,
1390                         array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
1391                 foreach ( $res as $row ) {
1392                         if( $row->rev_user != $id ) {
1393                                 return false;
1394                         }
1395                 }
1396                 return true;
1397         }
1398
1399         /**
1400          * @private
1401          * @todo document
1402          *
1403          * @parma $editText string
1404          *
1405          * @return bool
1406          */
1407         function mergeChangesInto( &$editText ){
1408                 wfProfileIn( __METHOD__ );
1409
1410                 $db = wfGetDB( DB_MASTER );
1411
1412                 // This is the revision the editor started from
1413                 $baseRevision = $this->getBaseRevision();
1414                 if ( is_null( $baseRevision ) ) {
1415                         wfProfileOut( __METHOD__ );
1416                         return false;
1417                 }
1418                 $baseText = $baseRevision->getText();
1419
1420                 // The current state, we want to merge updates into it
1421                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1422                 if ( is_null( $currentRevision ) ) {
1423                         wfProfileOut( __METHOD__ );
1424                         return false;
1425                 }
1426                 $currentText = $currentRevision->getText();
1427
1428                 $result = '';
1429                 if ( wfMerge( $baseText, $editText, $currentText, $result ) ) {
1430                         $editText = $result;
1431                         wfProfileOut( __METHOD__ );
1432                         return true;
1433                 } else {
1434                         wfProfileOut( __METHOD__ );
1435                         return false;
1436                 }
1437         }
1438
1439         /**
1440          * @return Revision
1441          */
1442         function getBaseRevision() {
1443                 if ( !$this->mBaseRevision ) {
1444                         $db = wfGetDB( DB_MASTER );
1445                         $baseRevision = Revision::loadFromTimestamp(
1446                                 $db, $this->mTitle, $this->edittime );
1447                         return $this->mBaseRevision = $baseRevision;
1448                 } else {
1449                         return $this->mBaseRevision;
1450                 }
1451         }
1452
1453         /**
1454          * Check given input text against $wgSpamRegex, and return the text of the first match.
1455          *
1456          * @param $text string
1457          *
1458          * @return string|false matching string or false
1459          */
1460         public static function matchSpamRegex( $text ) {
1461                 global $wgSpamRegex;
1462                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1463                 $regexes = (array)$wgSpamRegex;
1464                 return self::matchSpamRegexInternal( $text, $regexes );
1465         }
1466
1467         /**
1468          * Check given input text against $wgSpamRegex, and return the text of the first match.
1469          *
1470          * @parma $text string
1471          *
1472          * @return string|false  matching string or false
1473          */
1474         public static function matchSummarySpamRegex( $text ) {
1475                 global $wgSummarySpamRegex;
1476                 $regexes = (array)$wgSummarySpamRegex;
1477                 return self::matchSpamRegexInternal( $text, $regexes );
1478         }
1479
1480         /**
1481          * @param $text string
1482          * @param $regexes array
1483          * @return bool|string
1484          */
1485         protected static function matchSpamRegexInternal( $text, $regexes ) {
1486                 foreach( $regexes as $regex ) {
1487                         $matches = array();
1488                         if( preg_match( $regex, $text, $matches ) ) {
1489                                 return $matches[0];
1490                         }
1491                 }
1492                 return false;
1493         }
1494
1495         function setHeaders() {
1496                 global $wgOut;
1497                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1498                 if ( $this->isConflict ) {
1499                         $wgOut->setPageTitle( wfMessage( 'editconflict', $this->getContextTitle()->getPrefixedText() ) );
1500                 } elseif ( $this->section != '' ) {
1501                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1502                         $wgOut->setPageTitle( wfMessage( $msg, $this->getContextTitle()->getPrefixedText() ) );
1503                 } else {
1504                         # Use the title defined by DISPLAYTITLE magic word when present
1505                         if ( isset( $this->mParserOutput )
1506                          && ( $dt = $this->mParserOutput->getDisplayTitle() ) !== false ) {
1507                                 $title = $dt;
1508                         } else {
1509                                 $title = $this->getContextTitle()->getPrefixedText();
1510                         }
1511                         $wgOut->setPageTitle( wfMessage( 'editing', $title ) );
1512                 }
1513         }
1514
1515         /**
1516          * Show all applicable editing introductions
1517          */
1518         protected function showIntro() {
1519                 global $wgOut, $wgUser;
1520                 if ( $this->suppressIntro ) {
1521                         return;
1522                 }
1523
1524                 $namespace = $this->mTitle->getNamespace();
1525
1526                 if ( $namespace == NS_MEDIAWIKI ) {
1527                         # Show a warning if editing an interface message
1528                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
1529                 }
1530
1531                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
1532                 # Show log extract when the user is currently blocked
1533                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
1534                         $parts = explode( '/', $this->mTitle->getText(), 2 );
1535                         $username = $parts[0];
1536                         $user = User::newFromName( $username, false /* allow IP users*/ );
1537                         $ip = User::isIP( $username );
1538                         if ( !($user && $user->isLoggedIn()) && !$ip ) { # User does not exist
1539                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
1540                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
1541                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
1542                                 LogEventsList::showLogExtract(
1543                                         $wgOut,
1544                                         'block',
1545                                         $user->getUserPage(),
1546                                         '',
1547                                         array(
1548                                                 'lim' => 1,
1549                                                 'showIfEmpty' => false,
1550                                                 'msgKey' => array(
1551                                                         'blocked-notice-logextract',
1552                                                         $user->getName() # Support GENDER in notice
1553                                                 )
1554                                         )
1555                                 );
1556                         }
1557                 }
1558                 # Try to add a custom edit intro, or use the standard one if this is not possible.
1559                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
1560                         if ( $wgUser->isLoggedIn() ) {
1561                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
1562                         } else {
1563                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
1564                         }
1565                 }
1566                 # Give a notice if the user is editing a deleted/moved page...
1567                 if ( !$this->mTitle->exists() ) {
1568                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
1569                                 '', array( 'lim' => 10,
1570                                            'conds' => array( "log_action != 'revision'" ),
1571                                            'showIfEmpty' => false,
1572                                            'msgKey' => array( 'recreate-moveddeleted-warn') )
1573                         );
1574                 }
1575         }
1576
1577         /**
1578          * Attempt to show a custom editing introduction, if supplied
1579          *
1580          * @return bool
1581          */
1582         protected function showCustomIntro() {
1583                 if ( $this->editintro ) {
1584                         $title = Title::newFromText( $this->editintro );
1585                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
1586                                 global $wgOut;
1587                                 // Added using template syntax, to take <noinclude>'s into account.
1588                                 $wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
1589                                 return true;
1590                         } else {
1591                                 return false;
1592                         }
1593                 } else {
1594                         return false;
1595                 }
1596         }
1597
1598         /**
1599          * Send the edit form and related headers to $wgOut
1600          * @param $formCallback Callback that takes an OutputPage parameter; will be called
1601          *     during form output near the top, for captchas and the like.
1602          */
1603         function showEditForm( $formCallback = null ) {
1604                 global $wgOut, $wgUser;
1605
1606                 wfProfileIn( __METHOD__ );
1607
1608                 #need to parse the preview early so that we know which templates are used,
1609                 #otherwise users with "show preview after edit box" will get a blank list
1610                 #we parse this near the beginning so that setHeaders can do the title
1611                 #setting work instead of leaving it in getPreviewText
1612                 $previewOutput = '';
1613                 if ( $this->formtype == 'preview' ) {
1614                         $previewOutput = $this->getPreviewText();
1615                 }
1616
1617                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) );
1618
1619                 $this->setHeaders();
1620
1621                 # Enabled article-related sidebar, toplinks, etc.
1622                 $wgOut->setArticleRelated( true );
1623
1624                 if ( $this->showHeader() === false ) {
1625                         wfProfileOut( __METHOD__ );
1626                         return;
1627                 }
1628
1629                 $action = htmlspecialchars( $this->getActionURL( $this->getContextTitle() ) );
1630
1631                 if ( $wgUser->getOption( 'showtoolbar' ) and !$this->isCssJsSubpage ) {
1632                         # prepare toolbar for edit buttons
1633                         $toolbar = EditPage::getEditToolbar();
1634                 } else {
1635                         $toolbar = '';
1636                 }
1637
1638
1639                 $wgOut->addHTML( $this->editFormPageTop );
1640
1641                 if ( $wgUser->getOption( 'previewontop' ) ) {
1642                         $this->displayPreviewArea( $previewOutput, true );
1643                 }
1644
1645                 $wgOut->addHTML( $this->editFormTextTop );
1646
1647                 $templates = $this->getTemplates();
1648                 $formattedtemplates = Linker::formatTemplates( $templates, $this->preview, $this->section != '');
1649
1650                 $hiddencats = $this->mArticle->getHiddenCategories();
1651                 $formattedhiddencats = Linker::formatHiddenCategories( $hiddencats );
1652
1653                 if ( $this->wasDeletedSinceLastEdit() && 'save' != $this->formtype ) {
1654                         $wgOut->wrapWikiMsg(
1655                                 "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
1656                                 'deletedwhileediting' );
1657                 } elseif ( $this->wasDeletedSinceLastEdit() ) {
1658                         // Hide the toolbar and edit area, user can click preview to get it back
1659                         // Add an confirmation checkbox and explanation.
1660                         $toolbar = '';
1661                         // @todo move this to a cleaner conditional instead of blanking a variable
1662                 }
1663                 $wgOut->addHTML( <<<HTML
1664 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1665 HTML
1666 );
1667
1668                 if ( is_callable( $formCallback ) ) {
1669                         call_user_func_array( $formCallback, array( &$wgOut ) );
1670                 }
1671
1672                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1673
1674                 // Put these up at the top to ensure they aren't lost on early form submission
1675                 $this->showFormBeforeText();
1676
1677                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
1678                         $username = $this->lastDelete->user_name;
1679                         $comment = $this->lastDelete->log_comment;
1680
1681                         // It is better to not parse the comment at all than to have templates expanded in the middle
1682                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
1683                         $key = $comment === ''
1684                                 ? 'confirmrecreate-noreason'
1685                                 : 'confirmrecreate';
1686                         $wgOut->addHTML(
1687                                 '<div class="mw-confirm-recreate">' .
1688                                 wfMsgExt( $key, 'parseinline', $username, "<nowiki>$comment</nowiki>" ) .
1689                                 Xml::checkLabel( wfMsg( 'recreate' ), 'wpRecreate', 'wpRecreate', false,
1690                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
1691                                 ) .
1692                                 '</div>'
1693                         );
1694                 }
1695
1696                 # If a blank edit summary was previously provided, and the appropriate
1697                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1698                 # user being bounced back more than once in the event that a summary
1699                 # is not required.
1700                 #####
1701                 # For a bit more sophisticated detection of blank summaries, hash the
1702                 # automatic one and pass that in the hidden field wpAutoSummary.
1703                 if ( $this->missingSummary ||
1704                         ( $this->section == 'new' && $this->nosummary ) )
1705                                 $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
1706                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1707                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
1708
1709                 $wgOut->addHTML( Html::hidden( 'oldid', $this->mArticle->getOldID() ) );
1710
1711                 if ( $this->section == 'new' ) {
1712                         $this->showSummaryInput( true, $this->summary );
1713                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
1714                 }
1715
1716                 $wgOut->addHTML( $this->editFormTextBeforeContent );
1717
1718                 $wgOut->addHTML( $toolbar );
1719
1720                 if ( $this->isConflict ) {
1721                         // In an edit conflict bypass the overrideable content form method
1722                         // and fallback to the raw wpTextbox1 since editconflicts can't be
1723                         // resolved between page source edits and custom ui edits using the
1724                         // custom edit ui.
1725                         $this->showTextbox1( null, $this->getContent() );
1726                 } else {
1727                         $this->showContentForm();
1728                 }
1729
1730                 $wgOut->addHTML( $this->editFormTextAfterContent );
1731
1732                 $wgOut->addWikiText( $this->getCopywarn() );
1733                 if ( isset($this->editFormTextAfterWarn) && $this->editFormTextAfterWarn !== '' )
1734                         $wgOut->addHTML( $this->editFormTextAfterWarn );
1735
1736                 $this->showStandardInputs();
1737
1738                 $this->showFormAfterText();
1739
1740                 $this->showTosSummary();
1741                 $this->showEditTools();
1742
1743                 $wgOut->addHTML( <<<HTML
1744 {$this->editFormTextAfterTools}
1745 <div class='templatesUsed'>
1746 {$formattedtemplates}
1747 </div>
1748 <div class='hiddencats'>
1749 {$formattedhiddencats}
1750 </div>
1751 HTML
1752 );
1753
1754                 if ( $this->isConflict )
1755                         $this->showConflict();
1756
1757                 $wgOut->addHTML( $this->editFormTextBottom );
1758                 $wgOut->addHTML( "</form>\n" );
1759                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1760                         $this->displayPreviewArea( $previewOutput, false );
1761                 }
1762
1763                 wfProfileOut( __METHOD__ );
1764         }
1765
1766         /**
1767          * Extract the section title from current section text, if any.
1768          *
1769          * @param string $text
1770          * @return Mixed|string or false
1771          */
1772         public static function extractSectionTitle( $text ) {
1773                 preg_match( "/^(=+)(.+)\\1(\n|$)/i", $text, $matches );
1774                 if ( !empty( $matches[2] ) ) {
1775                         global $wgParser;
1776                         return $wgParser->stripSectionName(trim($matches[2]));
1777                 } else {
1778                         return false;
1779                 }
1780         }
1781
1782         protected function showHeader() {
1783                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
1784                 if ( $this->isConflict ) {
1785                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
1786                         $this->edittime = $this->mArticle->getTimestamp();
1787                 } else {
1788                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
1789                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
1790                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
1791                                 // Someone is welcome to try refactoring though
1792                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
1793                                 return false;
1794                         }
1795
1796                         if ( $this->section != '' && $this->section != 'new' ) {
1797                                 $matches = array();
1798                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
1799                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 );
1800                                         if ( $sectionTitle !== false ) {
1801                                                 $this->summary = "/* $sectionTitle */ ";
1802                                         }
1803                                 }
1804                         }
1805
1806                         if ( $this->missingComment ) {
1807                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
1808                         }
1809
1810                         if ( $this->missingSummary && $this->section != 'new' ) {
1811                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
1812                         }
1813
1814                         if ( $this->missingSummary && $this->section == 'new' ) {
1815                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
1816                         }
1817
1818                         if ( $this->hookError !== '' ) {
1819                                 $wgOut->addWikiText( $this->hookError );
1820                         }
1821
1822                         if ( !$this->checkUnicodeCompliantBrowser() ) {
1823                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
1824                         }
1825
1826                         if ( isset( $this->mArticle ) && isset( $this->mArticle->mRevision ) ) {
1827                         // Let sysop know that this will make private content public if saved
1828
1829                                 if ( !$this->mArticle->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1830                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
1831                                 } elseif ( $this->mArticle->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1832                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
1833                                 }
1834
1835                                 if ( !$this->mArticle->mRevision->isCurrent() ) {
1836                                         $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
1837                                         $wgOut->addWikiMsg( 'editingold' );
1838                                 }
1839                         }
1840                 }
1841
1842                 if ( wfReadOnly() ) {
1843                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
1844                 } elseif ( $wgUser->isAnon() ) {
1845                         if ( $this->formtype != 'preview' ) {
1846                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
1847                         } else {
1848                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
1849                         }
1850                 } else {
1851                         if ( $this->isCssJsSubpage ) {
1852                                 # Check the skin exists
1853                                 if ( $this->isWrongCaseCssJsPage ) {
1854                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
1855                                 }
1856                                 if ( $this->formtype !== 'preview' ) {
1857                                         if ( $this->isCssSubpage )
1858                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
1859                                         if ( $this->isJsSubpage )
1860                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
1861                                 }
1862                         }
1863                 }
1864
1865                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
1866                         # Is the title semi-protected?
1867                         if ( $this->mTitle->isSemiProtected() ) {
1868                                 $noticeMsg = 'semiprotectedpagewarning';
1869                         } else {
1870                                 # Then it must be protected based on static groups (regular)
1871                                 $noticeMsg = 'protectedpagewarning';
1872                         }
1873                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
1874                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
1875                 }
1876                 if ( $this->mTitle->isCascadeProtected() ) {
1877                         # Is this page under cascading protection from some source pages?
1878                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1879                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
1880                         $cascadeSourcesCount = count( $cascadeSources );
1881                         if ( $cascadeSourcesCount > 0 ) {
1882                                 # Explain, and list the titles responsible
1883                                 foreach( $cascadeSources as $page ) {
1884                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1885                                 }
1886                         }
1887                         $notice .= '</div>';
1888                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
1889                 }
1890                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
1891                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
1892                                 array(  'lim' => 1,
1893                                         'showIfEmpty' => false,
1894                                         'msgKey' => array( 'titleprotectedwarning' ),
1895                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
1896                 }
1897
1898                 if ( $this->kblength === false ) {
1899                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1900                 }
1901
1902                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
1903                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
1904                                 array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
1905                 } else {
1906                         if( !wfMessage('longpage-hint')->isDisabled() ) {
1907                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
1908                                         array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
1909                                 );
1910                         }
1911                 }
1912         }
1913
1914         /**
1915          * Standard summary input and label (wgSummary), abstracted so EditPage
1916          * subclasses may reorganize the form.
1917          * Note that you do not need to worry about the label's for=, it will be
1918          * inferred by the id given to the input. You can remove them both by
1919          * passing array( 'id' => false ) to $userInputAttrs.
1920          *
1921          * @param $summary string The value of the summary input
1922          * @param $labelText string The html to place inside the label
1923          * @param $inputAttrs array of attrs to use on the input
1924          * @param $spanLabelAttrs array of attrs to use on the span inside the label
1925          *
1926          * @return array An array in the format array( $label, $input )
1927          */
1928         function getSummaryInput($summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null) {
1929                 //Note: the maxlength is overriden in JS to 250 and to make it use UTF-8 bytes, not characters.
1930                 $inputAttrs = ( is_array($inputAttrs) ? $inputAttrs : array() ) + array(
1931                         'id' => 'wpSummary',
1932                         'maxlength' => '200',
1933                         'tabindex' => '1',
1934                         'size' => 60,
1935                         'spellcheck' => 'true',
1936                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
1937
1938                 $spanLabelAttrs = ( is_array($spanLabelAttrs) ? $spanLabelAttrs : array() ) + array(
1939                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
1940                         'id' => "wpSummaryLabel"
1941                 );
1942
1943                 $label = null;
1944                 if ( $labelText ) {
1945                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
1946                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
1947                 }
1948
1949                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
1950
1951                 return array( $label, $input );
1952         }
1953
1954         /**
1955          * @param $isSubjectPreview Boolean: true if this is the section subject/title
1956          *                          up top, or false if this is the comment summary
1957          *                          down below the textarea
1958          * @param $summary String: The text of the summary to display
1959          * @return String
1960          */
1961         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
1962                 global $wgOut, $wgContLang;
1963                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
1964                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
1965                 if ( $isSubjectPreview ) {
1966                         if ( $this->nosummary ) {
1967                                 return;
1968                         }
1969                 } else {
1970                         if ( !$this->mShowSummaryField ) {
1971                                 return;
1972                         }
1973                 }
1974                 $summary = $wgContLang->recodeForEdit( $summary );
1975                 $labelText = wfMsgExt( $isSubjectPreview ? 'subject' : 'summary', 'parseinline' );
1976                 list($label, $input) = $this->getSummaryInput($summary, $labelText, array( 'class' => $summaryClass ), array());
1977                 $wgOut->addHTML("{$label} {$input}");
1978         }
1979
1980         /**
1981          * @param $isSubjectPreview Boolean: true if this is the section subject/title
1982          *                          up top, or false if this is the comment summary
1983          *                          down below the textarea
1984          * @param $summary String: the text of the summary to display
1985          * @return String
1986          */
1987         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
1988                 if ( !$summary || ( !$this->preview && !$this->diff ) )
1989                         return "";
1990
1991                 global $wgParser;
1992
1993                 if ( $isSubjectPreview )
1994                         $summary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $summary ) );
1995
1996                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
1997
1998                 $summary = wfMsgExt( $message, 'parseinline' ) . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
1999                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2000         }
2001
2002         protected function showFormBeforeText() {
2003                 global $wgOut;
2004                 $section = htmlspecialchars( $this->section );
2005                 $wgOut->addHTML( <<<HTML
2006 <input type='hidden' value="{$section}" name="wpSection" />
2007 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2008 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2009 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2010
2011 HTML
2012                 );
2013                 if ( !$this->checkUnicodeCompliantBrowser() )
2014                         $wgOut->addHTML(Html::hidden( 'safemode', '1' ));
2015         }
2016
2017         protected function showFormAfterText() {
2018                 global $wgOut, $wgUser;
2019                 /**
2020                  * To make it harder for someone to slip a user a page
2021                  * which submits an edit form to the wiki without their
2022                  * knowledge, a random token is associated with the login
2023                  * session. If it's not passed back with the submission,
2024                  * we won't save the page, or render user JavaScript and
2025                  * CSS previews.
2026                  *
2027                  * For anon editors, who may not have a session, we just
2028                  * include the constant suffix to prevent editing from
2029                  * broken text-mangling proxies.
2030                  */
2031                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2032         }
2033
2034         /**
2035          * Subpage overridable method for printing the form for page content editing
2036          * By default this simply outputs wpTextbox1
2037          * Subclasses can override this to provide a custom UI for editing;
2038          * be it a form, or simply wpTextbox1 with a modified content that will be
2039          * reverse modified when extracted from the post data.
2040          * Note that this is basically the inverse for importContentFormData
2041          */
2042         protected function showContentForm() {
2043                 $this->showTextbox1();
2044         }
2045
2046         /**
2047          * Method to output wpTextbox1
2048          * The $textoverride method can be used by subclasses overriding showContentForm
2049          * to pass back to this method.
2050          *
2051          * @param $customAttribs An array of html attributes to use in the textarea
2052          * @param $textoverride String: optional text to override $this->textarea1 with
2053          */
2054         protected function showTextbox1($customAttribs = null, $textoverride = null) {
2055                 $classes = array(); // Textarea CSS
2056                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2057                         # Is the title semi-protected?
2058                         if ( $this->mTitle->isSemiProtected() ) {
2059                                 $classes[] = 'mw-textarea-sprotected';
2060                         } else {
2061                                 # Then it must be protected based on static groups (regular)
2062                                 $classes[] = 'mw-textarea-protected';
2063                         }
2064                         # Is the title cascade-protected?
2065                         if ( $this->mTitle->isCascadeProtected() ) {
2066                                 $classes[] = 'mw-textarea-cprotected';
2067                         }
2068                 }
2069                 $attribs = array( 'tabindex' => 1 );
2070                 if ( is_array($customAttribs) )
2071                         $attribs += $customAttribs;
2072
2073                 if ( $this->wasDeletedSinceLastEdit() )
2074                         $attribs['type'] = 'hidden';
2075                 if ( !empty( $classes ) ) {
2076                         if ( isset($attribs['class']) )
2077                                 $classes[] = $attribs['class'];
2078                         $attribs['class'] = implode( ' ', $classes );
2079                 }
2080
2081                 $this->showTextbox( isset($textoverride) ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
2082         }
2083
2084         protected function showTextbox2() {
2085                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2086         }
2087
2088         protected function showTextbox( $content, $name, $customAttribs = array() ) {
2089                 global $wgOut, $wgUser;
2090
2091                 $wikitext = $this->safeUnicodeOutput( $content );
2092                 if ( strval($wikitext) !== '' ) {
2093                         // Ensure there's a newline at the end, otherwise adding lines
2094                         // is awkward.
2095                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2096                         // mode will show an extra newline. A bit annoying.
2097                         $wikitext .= "\n";
2098                 }
2099
2100                 $attribs = $customAttribs + array(
2101                         'accesskey' => ',',
2102                         'id'   => $name,
2103                         'cols' => $wgUser->getIntOption( 'cols' ),
2104                         'rows' => $wgUser->getIntOption( 'rows' ),
2105                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
2106                 );
2107
2108                 $pageLang = $this->mTitle->getPageLanguage();
2109                 $attribs['lang'] = $pageLang->getCode();
2110                 $attribs['dir'] = $pageLang->getDir();
2111
2112                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2113         }
2114
2115         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2116                 global $wgOut;
2117                 $classes = array();
2118                 if ( $isOnTop )
2119                         $classes[] = 'ontop';
2120
2121                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2122
2123                 if ( $this->formtype != 'preview' )
2124                         $attribs['style'] = 'display: none;';
2125
2126                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2127
2128                 if ( $this->formtype == 'preview' ) {
2129                         $this->showPreview( $previewOutput );
2130                 }
2131
2132                 $wgOut->addHTML( '</div>' );
2133
2134                 if ( $this->formtype == 'diff') {
2135                         $this->showDiff();
2136                 }
2137         }
2138
2139         /**
2140          * Append preview output to $wgOut.
2141          * Includes category rendering if this is a category page.
2142          *
2143          * @param $text String: the HTML to be output for the preview.
2144          */
2145         protected function showPreview( $text ) {
2146                 global $wgOut;
2147                 if ( $this->mTitle->getNamespace() == NS_CATEGORY) {
2148                         $this->mArticle->openShowCategory();
2149                 }
2150                 # This hook seems slightly odd here, but makes things more
2151                 # consistent for extensions.
2152                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
2153                 $wgOut->addHTML( $text );
2154                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2155                         $this->mArticle->closeShowCategory();
2156                 }
2157         }
2158
2159         /**
2160          * Get a diff between the current contents of the edit box and the
2161          * version of the page we're editing from.
2162          *
2163          * If this is a section edit, we'll replace the section as for final
2164          * save and then make a comparison.
2165          */
2166         function showDiff() {
2167                 global $wgUser, $wgContLang, $wgParser;
2168
2169                 $oldtext = $this->mArticle->fetchContent();
2170                 $newtext = $this->mArticle->replaceSection(
2171                         $this->section, $this->textbox1, $this->summary, $this->edittime );
2172
2173                 wfRunHooks( 'EditPageGetDiffText', array( $this, &$newtext ) );
2174
2175                 $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
2176                 $newtext = $wgParser->preSaveTransform( $newtext, $this->mTitle, $wgUser, $popts );
2177                 $oldtitle = wfMsgExt( 'currentrev', array( 'parseinline' ) );
2178                 $newtitle = wfMsgExt( 'yourtext', array( 'parseinline' ) );
2179                 if ( $oldtext !== false  || $newtext != '' ) {
2180                         $de = new DifferenceEngine( $this->mArticle->getContext() );
2181                         $de->setText( $oldtext, $newtext );
2182                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2183                         $de->showDiffStyle();
2184                 } else {
2185                         $difftext = '';
2186                 }
2187
2188                 global $wgOut;
2189                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2190         }
2191
2192         /**
2193          * Give a chance for site and per-namespace customizations of
2194          * terms of service summary link that might exist separately
2195          * from the copyright notice.
2196          *
2197          * This will display between the save button and the edit tools,
2198          * so should remain short!
2199          */
2200         protected function showTosSummary() {
2201                 $msg = 'editpage-tos-summary';
2202                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
2203                 if( !wfMessage( $msg )->isDisabled() ) {
2204                         global $wgOut;
2205                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
2206                         $wgOut->addWikiMsg( $msg );
2207                         $wgOut->addHTML( '</div>' );
2208                 }
2209         }
2210
2211         protected function showEditTools() {
2212                 global $wgOut;
2213                 $wgOut->addHTML( '<div class="mw-editTools">' .
2214                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
2215                         '</div>' );
2216         }
2217
2218         protected function getCopywarn() {
2219                 global $wgRightsText;
2220                 if ( $wgRightsText ) {
2221                         $copywarnMsg = array( 'copyrightwarning',
2222                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
2223                                 $wgRightsText );
2224                 } else {
2225                         $copywarnMsg = array( 'copyrightwarning2',
2226                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
2227                 }
2228                 // Allow for site and per-namespace customization of contribution/copyright notice.
2229                 wfRunHooks( 'EditPageCopyrightWarning', array( $this->mTitle, &$copywarnMsg ) );
2230
2231                 return "<div id=\"editpage-copywarn\">\n" .
2232                         call_user_func_array("wfMsgNoTrans", $copywarnMsg) . "\n</div>";
2233         }
2234
2235         protected function showStandardInputs( &$tabindex = 2 ) {
2236                 global $wgOut;
2237                 $wgOut->addHTML( "<div class='editOptions'>\n" );
2238
2239                 if ( $this->section != 'new' ) {
2240                         $this->showSummaryInput( false, $this->summary );
2241                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
2242                 }
2243
2244                 $checkboxes = $this->getCheckboxes( $tabindex,
2245                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
2246                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
2247                 $wgOut->addHTML( "<div class='editButtons'>\n" );
2248                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
2249
2250                 $cancel = $this->getCancelLink();
2251                 if ( $cancel !== '' ) {
2252                         $cancel .= wfMsgExt( 'pipe-separator' , 'escapenoentities' );
2253                 }
2254                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ) );
2255                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
2256                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
2257                         htmlspecialchars( wfMsg( 'newwindow' ) );
2258                 $wgOut->addHTML( "      <span class='editHelp'>{$cancel}{$edithelp}</span>\n" );
2259                 $wgOut->addHTML( "</div><!-- editButtons -->\n</div><!-- editOptions -->\n" );
2260         }
2261
2262         /**
2263          * Show an edit conflict. textbox1 is already shown in showEditForm().
2264          * If you want to use another entry point to this function, be careful.
2265          */
2266         protected function showConflict() {
2267                 global $wgOut;
2268                 $this->textbox2 = $this->textbox1;
2269                 $this->textbox1 = $this->getContent();
2270                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
2271                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2272
2273                         $de = new DifferenceEngine( $this->mArticle->getContext() );
2274                         $de->setText( $this->textbox2, $this->textbox1 );
2275                         $de->showDiff( wfMsgExt( 'yourtext', 'parseinline' ), wfMsg( 'storedversion' ) );
2276
2277                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2278                         $this->showTextbox2();
2279                 }
2280         }
2281
2282         /**
2283          * @return string
2284          */
2285         public function getCancelLink() {
2286                 $cancelParams = array();
2287                 if ( !$this->isConflict && $this->mArticle->getOldID() > 0 ) {
2288                         $cancelParams['oldid'] = $this->mArticle->getOldID();
2289                 }
2290
2291                 return Linker::linkKnown(
2292                         $this->getContextTitle(),
2293                         wfMsgExt( 'cancel', array( 'parseinline' ) ),
2294                         array( 'id' => 'mw-editform-cancel' ),
2295                         $cancelParams
2296                 );
2297         }
2298
2299         /**
2300          * Returns the URL to use in the form's action attribute.
2301          * This is used by EditPage subclasses when simply customizing the action
2302          * variable in the constructor is not enough. This can be used when the
2303          * EditPage lives inside of a Special page rather than a custom page action.
2304          *
2305          * @param $title Title object for which is being edited (where we go to for &action= links)
2306          * @return string
2307          */
2308         protected function getActionURL( Title $title ) {
2309                 return $title->getLocalURL( array( 'action' => $this->action ) );
2310         }
2311
2312         /**
2313          * Check if a page was deleted while the user was editing it, before submit.
2314          * Note that we rely on the logging table, which hasn't been always there,
2315          * but that doesn't matter, because this only applies to brand new
2316          * deletes.
2317          */
2318         protected function wasDeletedSinceLastEdit() {
2319                 if ( $this->deletedSinceEdit !== null ) {
2320                         return $this->deletedSinceEdit;
2321                 }
2322
2323                 $this->deletedSinceEdit = false;
2324
2325                 if ( $this->mTitle->isDeletedQuick() ) {
2326                         $this->lastDelete = $this->getLastDelete();
2327                         if ( $this->lastDelete ) {
2328                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
2329                                 if ( $deleteTime > $this->starttime ) {
2330                                         $this->deletedSinceEdit = true;
2331                                 }
2332                         }
2333                 }
2334
2335                 return $this->deletedSinceEdit;
2336         }
2337
2338         protected function getLastDelete() {
2339                 $dbr = wfGetDB( DB_SLAVE );
2340                 $data = $dbr->selectRow(
2341                         array( 'logging', 'user' ),
2342                         array( 'log_type',
2343                                    'log_action',
2344                                    'log_timestamp',
2345                                    'log_user',
2346                                    'log_namespace',
2347                                    'log_title',
2348                                    'log_comment',
2349                                    'log_params',
2350                                    'log_deleted',
2351                                    'user_name' ),
2352                         array( 'log_namespace' => $this->mTitle->getNamespace(),
2353                                    'log_title' => $this->mTitle->getDBkey(),
2354                                    'log_type' => 'delete',
2355                                    'log_action' => 'delete',
2356                                    'user_id=log_user' ),
2357                         __METHOD__,
2358                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
2359                 );
2360                 // Quick paranoid permission checks...
2361                 if( is_object( $data ) ) {
2362                         if( $data->log_deleted & LogPage::DELETED_USER )
2363                                 $data->user_name = wfMsgHtml( 'rev-deleted-user' );
2364                         if( $data->log_deleted & LogPage::DELETED_COMMENT )
2365                                 $data->log_comment = wfMsgHtml( 'rev-deleted-comment' );
2366                 }
2367                 return $data;
2368         }
2369
2370         /**
2371          * Get the rendered text for previewing.
2372          * @return string
2373          */
2374         function getPreviewText() {
2375                 global $wgOut, $wgUser, $wgParser, $wgRawHtml;
2376
2377                 wfProfileIn( __METHOD__ );
2378
2379                 if ( $wgRawHtml && !$this->mTokenOk ) {
2380                         // Could be an offsite preview attempt. This is very unsafe if
2381                         // HTML is enabled, as it could be an attack.
2382                         $parsedNote = '';
2383                         if ( $this->textbox1 !== '' ) {
2384                                 // Do not put big scary notice, if previewing the empty
2385                                 // string, which happens when you initially edit
2386                                 // a category page, due to automatic preview-on-open.
2387                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
2388                                         wfMsg( 'session_fail_preview_html' ) . "</div>", true, /* interface */true );
2389                         }
2390                         wfProfileOut( __METHOD__ );
2391                         return $parsedNote;
2392                 }
2393
2394                 if ( $this->mTriedSave && !$this->mTokenOk ) {
2395                         if ( $this->mTokenOkExceptSuffix ) {
2396                                 $note = wfMsg( 'token_suffix_mismatch' );
2397                         } else {
2398                                 $note = wfMsg( 'session_fail_preview' );
2399                         }
2400                 } elseif ( $this->incompleteForm ) {
2401                         $note = wfMsg( 'edit_form_incomplete' );
2402                 } else {
2403                         $note = wfMsg( 'previewnote' );
2404                 }
2405
2406                 $parserOptions = ParserOptions::newFromUser( $wgUser );
2407                 $parserOptions->setEditSection( false );
2408                 $parserOptions->setTidy( true );
2409                 $parserOptions->setIsPreview( true );
2410                 $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
2411
2412                 # don't parse non-wikitext pages, show message about preview
2413                 # XXX: stupid php bug won't let us use $this->getContextTitle()->isCssJsSubpage() here -- This note has been there since r3530. Sure the bug was fixed time ago?
2414
2415                 if ( $this->isCssJsSubpage || !$this->mTitle->isWikitextPage() ) {
2416                         if( $this->mTitle->isCssJsSubpage() ) {
2417                                 $level = 'user';
2418                         } elseif( $this->mTitle->isCssOrJsPage() ) {
2419                                 $level = 'site';
2420                         } else {
2421                                 $level = false;
2422                         }
2423
2424                         # Used messages to make sure grep find them:
2425                         # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
2426                         if( $level ) {
2427                                 if (preg_match( "/\\.css$/", $this->mTitle->getText() ) ) {
2428                                         $previewtext = "<div id='mw-{$level}csspreview'>\n" . wfMsg( "{$level}csspreview" ) . "\n</div>";
2429                                         $class = "mw-code mw-css";
2430                                 } elseif (preg_match( "/\\.js$/", $this->mTitle->getText() ) ) {
2431                                         $previewtext = "<div id='mw-{$level}jspreview'>\n" . wfMsg( "{$level}jspreview" ) . "\n</div>";
2432                                         $class = "mw-code mw-js";
2433                                 } else {
2434                                         throw new MWException( 'A CSS/JS (sub)page but which is not css nor js!' );
2435                                 }
2436                         }
2437
2438                         $parserOutput = $wgParser->parse( $previewtext, $this->mTitle, $parserOptions );
2439                         $previewHTML = $parserOutput->mText;
2440                         $previewHTML .= "<pre class=\"$class\" dir=\"ltr\">\n" . htmlspecialchars( $this->textbox1 ) . "\n</pre>\n";
2441                 } else {
2442                         $rt = Title::newFromRedirectArray( $this->textbox1 );
2443                         if ( $rt ) {
2444                                 $previewHTML = $this->mArticle->viewRedirect( $rt, false );
2445                         } else {
2446                                 $toparse = $this->textbox1;
2447
2448                                 # If we're adding a comment, we need to show the
2449                                 # summary as the headline
2450                                 if ( $this->section == "new" && $this->summary != "" ) {
2451                                         $toparse = "== {$this->summary} ==\n\n" . $toparse;
2452                                 }
2453
2454                                 wfRunHooks( 'EditPageGetPreviewText', array( $this, &$toparse ) );
2455
2456                                 $parserOptions->enableLimitReport();
2457
2458                                 $toparse = $wgParser->preSaveTransform( $toparse, $this->mTitle, $wgUser, $parserOptions );
2459                                 $parserOutput = $wgParser->parse( $toparse, $this->mTitle, $parserOptions );
2460
2461                                 $previewHTML = $parserOutput->getText();
2462                                 $this->mParserOutput = $parserOutput;
2463                                 $wgOut->addParserOutputNoText( $parserOutput );
2464
2465                                 if ( count( $parserOutput->getWarnings() ) ) {
2466                                         $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
2467                                 }
2468                         }
2469                 }
2470
2471                 if( $this->isConflict ) {
2472                         $conflict = '<h2 id="mw-previewconflict">' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
2473                 } else {
2474                         $conflict = '<hr />';
2475                 }
2476
2477                 $previewhead = "<div class='previewnote'>\n" .
2478                         '<h2 id="mw-previewheader">' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>" .
2479                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
2480
2481                 $pageLang = $this->mTitle->getPageLanguage();
2482                 $attribs = array( 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
2483                         'class' => 'mw-content-'.$pageLang->getDir() );
2484                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
2485
2486                 wfProfileOut( __METHOD__ );
2487                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
2488         }
2489
2490         /**
2491          * @return Array
2492          */
2493         function getTemplates() {
2494                 if ( $this->preview || $this->section != '' ) {
2495                         $templates = array();
2496                         if ( !isset( $this->mParserOutput ) ) {
2497                                 return $templates;
2498                         }
2499                         foreach( $this->mParserOutput->getTemplates() as $ns => $template) {
2500                                 foreach( array_keys( $template ) as $dbk ) {
2501                                         $templates[] = Title::makeTitle($ns, $dbk);
2502                                 }
2503                         }
2504                         return $templates;
2505                 } else {
2506                         return $this->mArticle->getUsedTemplates();
2507                 }
2508         }
2509
2510         /**
2511          * Shows a bulletin board style toolbar for common editing functions.
2512          * It can be disabled in the user preferences.
2513          * The necessary JavaScript code can be found in skins/common/edit.js.
2514          *
2515          * @return string
2516          */
2517         static function getEditToolbar() {
2518                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
2519                 global $wgUseTeX, $wgEnableUploads, $wgForeignFileRepos;
2520
2521                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
2522
2523                 /**
2524                  * $toolarray is an array of arrays each of which includes the
2525                  * filename of the button image (without path), the opening
2526                  * tag, the closing tag, optionally a sample text that is
2527                  * inserted between the two when no selection is highlighted
2528                  * and.  The tip text is shown when the user moves the mouse
2529                  * over the button.
2530                  *
2531                  * Also here: accesskeys (key), which are not used yet until
2532                  * someone can figure out a way to make them work in
2533                  * IE. However, we should make sure these keys are not defined
2534                  * on the edit page.
2535                  */
2536                 $toolarray = array(
2537                         array(
2538                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
2539                                 'id'     => 'mw-editbutton-bold',
2540                                 'open'   => '\'\'\'',
2541                                 'close'  => '\'\'\'',
2542                                 'sample' => wfMsg( 'bold_sample' ),
2543                                 'tip'    => wfMsg( 'bold_tip' ),
2544                                 'key'    => 'B'
2545                         ),
2546                         array(
2547                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
2548                                 'id'     => 'mw-editbutton-italic',
2549                                 'open'   => '\'\'',
2550                                 'close'  => '\'\'',
2551                                 'sample' => wfMsg( 'italic_sample' ),
2552                                 'tip'    => wfMsg( 'italic_tip' ),
2553                                 'key'    => 'I'
2554                         ),
2555                         array(
2556                                 'image'  => $wgLang->getImageFile( 'button-link' ),
2557                                 'id'     => 'mw-editbutton-link',
2558                                 'open'   => '[[',
2559                                 'close'  => ']]',
2560                                 'sample' => wfMsg( 'link_sample' ),
2561                                 'tip'    => wfMsg( 'link_tip' ),
2562                                 'key'    => 'L'
2563                         ),
2564                         array(
2565                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
2566                                 'id'     => 'mw-editbutton-extlink',
2567                                 'open'   => '[',
2568                                 'close'  => ']',
2569                                 'sample' => wfMsg( 'extlink_sample' ),
2570                                 'tip'    => wfMsg( 'extlink_tip' ),
2571                                 'key'    => 'X'
2572                         ),
2573                         array(
2574                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
2575                                 'id'     => 'mw-editbutton-headline',
2576                                 'open'   => "\n== ",
2577                                 'close'  => " ==\n",
2578                                 'sample' => wfMsg( 'headline_sample' ),
2579                                 'tip'    => wfMsg( 'headline_tip' ),
2580                                 'key'    => 'H'
2581                         ),
2582                         $imagesAvailable ? array(
2583                                 'image'  => $wgLang->getImageFile( 'button-image' ),
2584                                 'id'     => 'mw-editbutton-image',
2585                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
2586                                 'close'  => ']]',
2587                                 'sample' => wfMsg( 'image_sample' ),
2588                                 'tip'    => wfMsg( 'image_tip' ),
2589                                 'key'    => 'D',
2590                         ) : false,
2591                         $imagesAvailable ? array(
2592                                 'image'  => $wgLang->getImageFile( 'button-media' ),
2593                                 'id'     => 'mw-editbutton-media',
2594                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
2595                                 'close'  => ']]',
2596                                 'sample' => wfMsg( 'media_sample' ),
2597                                 'tip'    => wfMsg( 'media_tip' ),
2598                                 'key'    => 'M'
2599                         ) : false,
2600                         $wgUseTeX ?     array(
2601                                 'image'  => $wgLang->getImageFile( 'button-math' ),
2602                                 'id'     => 'mw-editbutton-math',
2603                                 'open'   => "<math>",
2604                                 'close'  => "</math>",
2605                                 'sample' => wfMsg( 'math_sample' ),
2606                                 'tip'    => wfMsg( 'math_tip' ),
2607                                 'key'    => 'C'
2608                         ) : false,
2609                         array(
2610                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
2611                                 'id'     => 'mw-editbutton-nowiki',
2612                                 'open'   => "<nowiki>",
2613                                 'close'  => "</nowiki>",
2614                                 'sample' => wfMsg( 'nowiki_sample' ),
2615                                 'tip'    => wfMsg( 'nowiki_tip' ),
2616                                 'key'    => 'N'
2617                         ),
2618                         array(
2619                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
2620                                 'id'     => 'mw-editbutton-signature',
2621                                 'open'   => '--~~~~',
2622                                 'close'  => '',
2623                                 'sample' => '',
2624                                 'tip'    => wfMsg( 'sig_tip' ),
2625                                 'key'    => 'Y'
2626                         ),
2627                         array(
2628                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
2629                                 'id'     => 'mw-editbutton-hr',
2630                                 'open'   => "\n----\n",
2631                                 'close'  => '',
2632                                 'sample' => '',
2633                                 'tip'    => wfMsg( 'hr_tip' ),
2634                                 'key'    => 'R'
2635                         )
2636                 );
2637
2638                 $script = '';
2639                 foreach ( $toolarray as $tool ) {
2640                         if ( !$tool ) {
2641                                 continue;
2642                         }
2643
2644                         $params = array(
2645                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
2646                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
2647                                 // Older browsers show a "speedtip" type message only for ALT.
2648                                 // Ideally these should be different, realistically they
2649                                 // probably don't need to be.
2650                                 $tip = $tool['tip'],
2651                                 $open = $tool['open'],
2652                                 $close = $tool['close'],
2653                                 $sample = $tool['sample'],
2654                                 $cssId = $tool['id'],
2655                         );
2656
2657                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
2658                 }
2659                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
2660
2661                 $toolbar = '<div id="toolbar"></div>';
2662
2663                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
2664
2665                 return $toolbar;
2666         }
2667
2668         /**
2669          * Returns an array of html code of the following checkboxes:
2670          * minor and watch
2671          *
2672          * @param $tabindex Current tabindex
2673          * @param $checked Array of checkbox => bool, where bool indicates the checked
2674          *                 status of the checkbox
2675          *
2676          * @return array
2677          */
2678         public function getCheckboxes( &$tabindex, $checked ) {
2679                 global $wgUser;
2680
2681                 $checkboxes = array();
2682
2683                 // don't show the minor edit checkbox if it's a new page or section
2684                 if ( !$this->isNew ) {
2685                         $checkboxes['minor'] = '';
2686                         $minorLabel = wfMsgExt( 'minoredit', array( 'parseinline' ) );
2687                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
2688                                 $attribs = array(
2689                                         'tabindex'  => ++$tabindex,
2690                                         'accesskey' => wfMsg( 'accesskey-minoredit' ),
2691                                         'id'        => 'wpMinoredit',
2692                                 );
2693                                 $checkboxes['minor'] =
2694                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
2695                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
2696                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
2697                                         ">{$minorLabel}</label>";
2698                         }
2699                 }
2700
2701                 $watchLabel = wfMsgExt( 'watchthis', array( 'parseinline' ) );
2702                 $checkboxes['watch'] = '';
2703                 if ( $wgUser->isLoggedIn() ) {
2704                         $attribs = array(
2705                                 'tabindex'  => ++$tabindex,
2706                                 'accesskey' => wfMsg( 'accesskey-watch' ),
2707                                 'id'        => 'wpWatchthis',
2708                         );
2709                         $checkboxes['watch'] =
2710                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
2711                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
2712                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
2713                                 ">{$watchLabel}</label>";
2714                 }
2715                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
2716                 return $checkboxes;
2717         }
2718
2719         /**
2720          * Returns an array of html code of the following buttons:
2721          * save, diff, preview and live
2722          *
2723          * @param $tabindex Current tabindex
2724          *
2725          * @return array
2726          */
2727         public function getEditButtons( &$tabindex ) {
2728                 $buttons = array();
2729
2730                 $temp = array(
2731                         'id'        => 'wpSave',
2732                         'name'      => 'wpSave',
2733                         'type'      => 'submit',
2734                         'tabindex'  => ++$tabindex,
2735                         'value'     => wfMsg( 'savearticle' ),
2736                         'accesskey' => wfMsg( 'accesskey-save' ),
2737                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
2738                 );
2739                 $buttons['save'] = Xml::element('input', $temp, '');
2740
2741                 ++$tabindex; // use the same for preview and live preview
2742                 $temp = array(
2743                         'id'        => 'wpPreview',
2744                         'name'      => 'wpPreview',
2745                         'type'      => 'submit',
2746                         'tabindex'  => $tabindex,
2747                         'value'     => wfMsg( 'showpreview' ),
2748                         'accesskey' => wfMsg( 'accesskey-preview' ),
2749                         'title'     => wfMsg( 'tooltip-preview' ) . ' [' . wfMsg( 'accesskey-preview' ) . ']',
2750                 );
2751                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
2752                 $buttons['live'] = '';
2753
2754                 $temp = array(
2755                         'id'        => 'wpDiff',
2756                         'name'      => 'wpDiff',
2757                         'type'      => 'submit',
2758                         'tabindex'  => ++$tabindex,
2759                         'value'     => wfMsg( 'showdiff' ),
2760                         'accesskey' => wfMsg( 'accesskey-diff' ),
2761                         'title'     => wfMsg( 'tooltip-diff' ) . ' [' . wfMsg( 'accesskey-diff' ) . ']',
2762                 );
2763                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
2764
2765                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
2766                 return $buttons;
2767         }
2768
2769         /**
2770          * Output preview text only. This can be sucked into the edit page
2771          * via JavaScript, and saves the server time rendering the skin as
2772          * well as theoretically being more robust on the client (doesn't
2773          * disturb the edit box's undo history, won't eat your text on
2774          * failure, etc).
2775          *
2776          * @todo This doesn't include category or interlanguage links.
2777          *       Would need to enhance it a bit, <s>maybe wrap them in XML
2778          *       or something...</s> that might also require more skin
2779          *       initialization, so check whether that's a problem.
2780          */
2781         function livePreview() {
2782                 global $wgOut;
2783                 $wgOut->disable();
2784                 header( 'Content-type: text/xml; charset=utf-8' );
2785                 header( 'Cache-control: no-cache' );
2786
2787                 $previewText = $this->getPreviewText();
2788                 #$categories = $skin->getCategoryLinks();
2789
2790                 $s =
2791                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
2792                 Xml::tags( 'livepreview', null,
2793                         Xml::element( 'preview', null, $previewText )
2794                         #.      Xml::element( 'category', null, $categories )
2795                 );
2796                 echo $s;
2797         }
2798
2799         /**
2800          * Call the stock "user is blocked" page
2801          *
2802          * @deprecated in 1.19; throw an exception directly instead
2803          */
2804         function blockedPage() {
2805                 wfDeprecated( __METHOD__, '1.19' );
2806                 global $wgUser;
2807
2808                 throw new UserBlockedError( $wgUser->mBlock );
2809         }
2810
2811         /**
2812          * Produce the stock "please login to edit pages" page
2813          *
2814          * @deprecated in 1.19; throw an exception directly instead
2815          */
2816         function userNotLoggedInPage() {
2817                 wfDeprecated( __METHOD__, '1.19' );
2818                 throw new PermissionsError( 'edit' );
2819         }
2820
2821         /**
2822          * Show an error page saying to the user that he has insufficient permissions
2823          * to create a new page
2824          *
2825          * @deprecated in 1.19; throw an exception directly instead
2826          */
2827         function noCreatePermission() {
2828                 wfDeprecated( __METHOD__, '1.19' );
2829                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
2830                 throw new PermissionsError( $permission );
2831         }
2832
2833         /**
2834          * Creates a basic error page which informs the user that
2835          * they have attempted to edit a nonexistent section.
2836          */
2837         function noSuchSectionPage() {
2838                 global $wgOut;
2839
2840                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
2841
2842                 $res = wfMsgExt( 'nosuchsectiontext', 'parse', $this->section );
2843                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
2844                 $wgOut->addHTML( $res );
2845
2846                 $wgOut->returnToMain( false, $this->mTitle );
2847         }
2848
2849         /**
2850          * Produce the stock "your edit contains spam" page
2851          *
2852          * @param $match Text which triggered one or more filters
2853          * @deprecated since 1.17 Use method spamPageWithContent() instead
2854          */
2855         static function spamPage( $match = false ) {
2856                 wfDeprecated( __METHOD__, '1.17' );
2857
2858                 global $wgOut, $wgTitle;
2859
2860                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
2861
2862                 $wgOut->addHTML( '<div id="spamprotected">' );
2863                 $wgOut->addWikiMsg( 'spamprotectiontext' );
2864                 if ( $match ) {
2865                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
2866                 }
2867                 $wgOut->addHTML( '</div>' );
2868
2869                 $wgOut->returnToMain( false, $wgTitle );
2870         }
2871
2872         /**
2873          * Show "your edit contains spam" page with your diff and text
2874          *
2875          * @param $match Text which triggered one or more filters
2876          */
2877         public function spamPageWithContent( $match = false ) {
2878                 global $wgOut;
2879                 $this->textbox2 = $this->textbox1;
2880
2881                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
2882
2883                 $wgOut->addHTML( '<div id="spamprotected">' );
2884                 $wgOut->addWikiMsg( 'spamprotectiontext' );
2885                 if ( $match ) {
2886                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
2887                 }
2888                 $wgOut->addHTML( '</div>' );
2889
2890                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2891                 $de = new DifferenceEngine( $this->mArticle->getContext() );
2892                 $de->setText( $this->getContent(), $this->textbox2 );
2893                 $de->showDiff( wfMsg( "storedversion" ), wfMsgExt( 'yourtext', 'parseinline' ) );
2894
2895                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2896                 $this->showTextbox2();
2897
2898                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
2899         }
2900
2901         /**
2902          * Format an anchor fragment as it would appear for a given section name
2903          * @param $text String
2904          * @return String
2905          * @private
2906          */
2907         function sectionAnchor( $text ) {
2908                 global $wgParser;
2909                 return $wgParser->guessSectionNameFromWikiText( $text );
2910         }
2911
2912         /**
2913          * Check if the browser is on a blacklist of user-agents known to
2914          * mangle UTF-8 data on form submission. Returns true if Unicode
2915          * should make it through, false if it's known to be a problem.
2916          * @return bool
2917          * @private
2918          */
2919         function checkUnicodeCompliantBrowser() {
2920                 global $wgBrowserBlackList;
2921                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
2922                         // No User-Agent header sent? Trust it by default...
2923                         return true;
2924                 }
2925                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
2926                 foreach ( $wgBrowserBlackList as $browser ) {
2927                         if ( preg_match($browser, $currentbrowser) ) {
2928                                 return false;
2929                         }
2930                 }
2931                 return true;
2932         }
2933
2934         /**
2935          * Filter an input field through a Unicode de-armoring process if it
2936          * came from an old browser with known broken Unicode editing issues.
2937          *
2938          * @param $request WebRequest
2939          * @param $field String
2940          * @return String
2941          * @private
2942          */
2943         function safeUnicodeInput( $request, $field ) {
2944                 $text = rtrim( $request->getText( $field ) );
2945                 return $request->getBool( 'safemode' )
2946                         ? $this->unmakesafe( $text )
2947                         : $text;
2948         }
2949
2950         /**
2951          * @param $request WebRequest
2952          * @param $text string
2953          * @return string
2954          */
2955         function safeUnicodeText( $request, $text ) {
2956                 $text = rtrim( $text );
2957                 return $request->getBool( 'safemode' )
2958                         ? $this->unmakesafe( $text )
2959                         : $text;
2960         }
2961
2962         /**
2963          * Filter an output field through a Unicode armoring process if it is
2964          * going to an old browser with known broken Unicode editing issues.
2965          *
2966          * @param $text String
2967          * @return String
2968          * @private
2969          */
2970         function safeUnicodeOutput( $text ) {
2971                 global $wgContLang;
2972                 $codedText = $wgContLang->recodeForEdit( $text );
2973                 return $this->checkUnicodeCompliantBrowser()
2974                         ? $codedText
2975                         : $this->makesafe( $codedText );
2976         }
2977
2978         /**
2979          * A number of web browsers are known to corrupt non-ASCII characters
2980          * in a UTF-8 text editing environment. To protect against this,
2981          * detected browsers will be served an armored version of the text,
2982          * with non-ASCII chars converted to numeric HTML character references.
2983          *
2984          * Preexisting such character references will have a 0 added to them
2985          * to ensure that round-trips do not alter the original data.
2986          *
2987          * @param $invalue String
2988          * @return String
2989          * @private
2990          */
2991         function makesafe( $invalue ) {
2992                 // Armor existing references for reversability.
2993                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
2994
2995                 $bytesleft = 0;
2996                 $result = "";
2997                 $working = 0;
2998                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2999                         $bytevalue = ord( $invalue[$i] );
3000                         if ( $bytevalue <= 0x7F ) { //0xxx xxxx
3001                                 $result .= chr( $bytevalue );
3002                                 $bytesleft = 0;
3003                         } elseif ( $bytevalue <= 0xBF ) { //10xx xxxx
3004                                 $working = $working << 6;
3005                                 $working += ($bytevalue & 0x3F);
3006                                 $bytesleft--;
3007                                 if ( $bytesleft <= 0 ) {
3008                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3009                                 }
3010                         } elseif ( $bytevalue <= 0xDF ) { //110x xxxx
3011                                 $working = $bytevalue & 0x1F;
3012                                 $bytesleft = 1;
3013                         } elseif ( $bytevalue <= 0xEF ) { //1110 xxxx
3014                                 $working = $bytevalue & 0x0F;
3015                                 $bytesleft = 2;
3016                         } else { //1111 0xxx
3017                                 $working = $bytevalue & 0x07;
3018                                 $bytesleft = 3;
3019                         }
3020                 }
3021                 return $result;
3022         }
3023
3024         /**
3025          * Reverse the previously applied transliteration of non-ASCII characters
3026          * back to UTF-8. Used to protect data from corruption by broken web browsers
3027          * as listed in $wgBrowserBlackList.
3028          *
3029          * @param $invalue String
3030          * @return String
3031          * @private
3032          */
3033         function unmakesafe( $invalue ) {
3034                 $result = "";
3035                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
3036                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i+3] != '0' ) ) {
3037                                 $i += 3;
3038                                 $hexstring = "";
3039                                 do {
3040                                         $hexstring .= $invalue[$i];
3041                                         $i++;
3042                                 } while( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
3043
3044                                 // Do some sanity checks. These aren't needed for reversability,
3045                                 // but should help keep the breakage down if the editor
3046                                 // breaks one of the entities whilst editing.
3047                                 if ( (substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6) ) {
3048                                         $codepoint = hexdec($hexstring);
3049                                         $result .= codepointToUtf8( $codepoint );
3050                                 } else {
3051                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
3052                                 }
3053                         } else {
3054                                 $result .= substr( $invalue, $i, 1 );
3055                         }
3056                 }
3057                 // reverse the transform that we made for reversability reasons.
3058                 return strtr( $result, array( "&#x0" => "&#x" ) );
3059         }
3060 }