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          * @param $article Article
 117          */
 118         public function __construct( Article $article ) {
 119                 $this->mArticle = $article;
 120                 $this->mTitle = $article->getTitle();
 121         }
 122
 123         /**
 124          * @return Article
 125          */
 126         public function getArticle() {
 127                 return $this->mArticle;
 128         }
 129
 130         /**
 131          * @since 1.19
 132          * @return Title
 133          */
 134         public function getTitle() {
 135                 return $this->mTitle;
 136         }
 137
 138         /**
 139          * Set the context Title object
 140          *
 141          * @param $title Title object or null
 142          */
 143         public function setContextTitle( $title ) {
 144                 $this->mContextTitle = $title;
 145         }
 146
 147         /**
 148          * Get the context title object.
 149          * If not set, $wgTitle will be returned. This behavior might changed in
 150          * the future to return $this->mTitle instead.
 151          *
 152          * @return Title object
 153          */
 154         public function getContextTitle() {
 155                 if ( is_null( $this->mContextTitle ) ) {
 156                         global $wgTitle;
 157                         return $wgTitle;
 158                 } else {
 159                         return $this->mContextTitle;
 160                 }
 161         }
 162
 163         function submit() {
 164                 $this->edit();
 165         }
 166
 167         /**
 168          * This is the function that gets called for "action=edit". It
 169          * sets up various member variables, then passes execution to
 170          * another function, usually showEditForm()
 171          *
 172          * The edit form is self-submitting, so that when things like
 173          * preview and edit conflicts occur, we get the same form back
 174          * with the extra stuff added.  Only when the final submission
 175          * is made and all is well do we actually save and redirect to
 176          * the newly-edited page.
 177          */
 178         function edit() {
 179                 global $wgOut, $wgRequest, $wgUser;
 180                 // Allow extensions to modify/prevent this form or submission
 181                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 182                         return;
 183                 }
 184
 185                 wfProfileIn( __METHOD__ );
 186                 wfDebug( __METHOD__.": enter\n" );
 187
 188                 // If they used redlink=1 and the page exists, redirect to the main article
 189                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 190                         $wgOut->redirect( $this->mTitle->getFullURL() );
 191                         wfProfileOut( __METHOD__ );
 192                         return;
 193                 }
 194
 195                 $this->importFormData( $wgRequest );
 196                 $this->firsttime = false;
 197
 198                 if ( $this->live ) {
 199                         $this->livePreview();
 200                         wfProfileOut( __METHOD__ );
 201                         return;
 202                 }
 203
 204                 if ( wfReadOnly() && $this->save ) {
 205                         // Force preview
 206                         $this->save = false;
 207                         $this->preview = true;
 208                 }
 209
 210                 if ( $this->save ) {
 211                         $this->formtype = 'save';
 212                 } elseif ( $this->preview ) {
 213                         $this->formtype = 'preview';
 214                 } elseif ( $this->diff ) {
 215                         $this->formtype = 'diff';
 216                 } else { # First time through
 217                         $this->firsttime = true;
 218                         if ( $this->previewOnOpen() ) {
 219                                 $this->formtype = 'preview';
 220                         } else {
 221                                 $this->formtype = 'initial';
 222                         }
 223                 }
 224
 225                 $permErrors = $this->getEditPermissionErrors();
 226                 if ( $permErrors ) {
 227                         wfDebug( __METHOD__ . ": User can't edit\n" );
 228                         // Auto-block user's IP if the account was "hard" blocked
 229                         $wgUser->spreadAnyEditBlock();
 230
 231                         $this->displayPermissionsError( $permErrors );
 232
 233                         wfProfileOut( __METHOD__ );
 234                         return;
 235                 }
 236
 237                 $wgOut->addModules( 'mediawiki.action.edit' );
 238
 239                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
 240                         $wgOut->addModules( 'mediawiki.legacy.preview' );
 241                 }
 242                 // Bug #19334: textarea jumps when editing articles in IE8
 243                 $wgOut->addStyle( 'common/IE80Fixes.css', 'screen', 'IE 8' );
 244
 245                 wfProfileIn( __METHOD__."-business-end" );
 246
 247                 $this->isConflict = false;
 248                 // css / js subpages of user pages get a special treatment
 249                 $this->isCssJsSubpage       = $this->mTitle->isCssJsSubpage();
 250                 $this->isCssSubpage         = $this->mTitle->isCssSubpage();
 251                 $this->isJsSubpage          = $this->mTitle->isJsSubpage();
 252                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 253                 $this->isNew                = !$this->mTitle->exists() || $this->section == 'new';
 254
 255                 # Show applicable editing introductions
 256                 if ( $this->formtype == 'initial' || $this->firsttime )
 257                         $this->showIntro();
 258
 259                 if ( $this->mTitle->isTalkPage() ) {
 260                         $wgOut->addWikiMsg( 'talkpagetext' );
 261                 }
 262
 263                 # Optional notices on a per-namespace and per-page basis
 264                 $editnotice_ns   = 'editnotice-'.$this->mTitle->getNamespace();
 265                 $editnotice_ns_message = wfMessage( $editnotice_ns )->inContentLanguage();
 266                 if ( $editnotice_ns_message->exists() ) {
 267                         $wgOut->addWikiText( $editnotice_ns_message->plain() );
 268                 }
 269                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
 270                         $parts = explode( '/', $this->mTitle->getDBkey() );
 271                         $editnotice_base = $editnotice_ns;
 272                         while ( count( $parts ) > 0 ) {
 273                                 $editnotice_base .= '-'.array_shift( $parts );
 274                                 $editnotice_base_msg = wfMessage( $editnotice_base )->inContentLanguage();
 275                                 if ( $editnotice_base_msg->exists() ) {
 276                                         $wgOut->addWikiText( $editnotice_base_msg->plain()  );
 277                                 }
 278                         }
 279                 } else {
 280                         # Even if there are no subpages in namespace, we still don't want / in MW ns.
 281                         $editnoticeText = $editnotice_ns . '-' . str_replace( '/', '-', $this->mTitle->getDBkey() );
 282                         $editnoticeMsg = wfMessage( $editnoticeText )->inContentLanguage();
 283                         if ( $editnoticeMsg->exists() ) {
 284                                 $wgOut->addWikiText( $editnoticeMsg->plain() );
 285                         }
 286                 }
 287
 288                 # Attempt submission here.  This will check for edit conflicts,
 289                 # and redundantly check for locked database, blocked IPs, etc.
 290                 # that edit() already checked just in case someone tries to sneak
 291                 # in the back door with a hand-edited submission URL.
 292
 293                 if ( 'save' == $this->formtype ) {
 294                         if ( !$this->attemptSave() ) {
 295                                 wfProfileOut( __METHOD__."-business-end" );
 296                                 wfProfileOut( __METHOD__ );
 297                                 return;
 298                         }
 299                 }
 300
 301                 # First time through: get contents, set time for conflict
 302                 # checking, etc.
 303                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 304                         if ( $this->initialiseForm() === false ) {
 305                                 $this->noSuchSectionPage();
 306                                 wfProfileOut( __METHOD__."-business-end" );
 307                                 wfProfileOut( __METHOD__ );
 308                                 return;
 309                         }
 310                         if ( !$this->mTitle->getArticleId() )
 311                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 312                         else
 313                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 314                 }
 315
 316                 $this->showEditForm();
 317                 wfProfileOut( __METHOD__."-business-end" );
 318                 wfProfileOut( __METHOD__ );
 319         }
 320
 321         /**
 322          * @return array
 323          */
 324         protected function getEditPermissionErrors() {
 325                 global $wgUser;
 326                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 327                 # Can this title be created?
 328                 if ( !$this->mTitle->exists() ) {
 329                         $permErrors = array_merge( $permErrors,
 330                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 331                 }
 332                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 333                 $remove = array();
 334                 foreach( $permErrors as $error ) {
 335                         if ( ( $this->preview || $this->diff ) &&
 336                                 ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' ) )
 337                         {
 338                                 $remove[] = $error;
 339                         }
 340                 }
 341                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 342                 return $permErrors;
 343         }
 344
 345         /**
 346          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 347          * but with the following differences:
 348          * - If redlink=1, the user will be redirected to the page
 349          * - If there is content to display or the error occurs while either saving,
 350          *   previewing or showing the difference, it will be a
 351          *   "View source for ..." page displaying the source code after the error message.
 352          *
 353          * @since 1.19
 354          * @param $permErrors Array of permissions errors, as returned by
 355          *                    Title::getUserPermissionsErrors().
 356          */
 357         protected function displayPermissionsError( array $permErrors ) {
 358                 global $wgRequest, $wgOut;
 359
 360                 if ( $wgRequest->getBool( 'redlink' ) ) {
 361                         // The edit page was reached via a red link.
 362                         // Redirect to the article page and let them click the edit tab if
 363                         // they really want a permission error.
 364                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 365                         return;
 366                 }
 367
 368                 $content = $this->getContent();
 369
 370                 # Use the normal message if there's nothing to display
 371                 if ( $this->firsttime && $content === '' ) {
 372                         $action = $this->mTitle->exists() ? 'edit' :
 373                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 374                         throw new PermissionsError( $action, $permErrors );
 375                 }
 376
 377                 $wgOut->setPageTitle( wfMessage( 'viewsource-title', $this->getContextTitle()->getPrefixedText() ) );
 378                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 379                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 380                 $wgOut->addHTML( "<hr />\n" );
 381
 382                 # If the user made changes, preserve them when showing the markup
 383                 # (This happens when a user is blocked during edit, for instance)
 384                 if ( !$this->firsttime ) {
 385                         $content = $this->textbox1;
 386                         $wgOut->addWikiMsg( 'viewyourtext' );
 387                 } else {
 388                         $wgOut->addWikiMsg( 'viewsourcetext' );
 389                 }
 390
 391                 $this->showTextbox( $content, 'wpTextbox1', array( 'readonly' ) );
 392
 393                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 394                         Linker::formatTemplates( $this->getTemplates() ) ) );
 395
 396                 if ( $this->mTitle->exists() ) {
 397                         $wgOut->returnToMain( null, $this->mTitle );
 398                 }
 399         }
 400
 401         /**
 402          * Show a read-only error
 403          * Parameters are the same as OutputPage:readOnlyPage()
 404          * Redirect to the article page if redlink=1
 405          * @deprecated in 1.19; use displayPermissionsError() instead
 406          */
 407         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 408                 wfDeprecated( __METHOD__, '1.19' );
 409
 410                 global $wgRequest, $wgOut;
 411                 if ( $wgRequest->getBool( 'redlink' ) ) {
 412                         // The edit page was reached via a red link.
 413                         // Redirect to the article page and let them click the edit tab if
 414                         // they really want a permission error.
 415                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 416                 } else {
 417                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 418                 }
 419         }
 420
 421         /**
 422          * Should we show a preview when the edit form is first shown?
 423          *
 424          * @return bool
 425          */
 426         protected function previewOnOpen() {
 427                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 428                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 429                         // Explicit override from request
 430                         return true;
 431                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 432                         // Explicit override from request
 433                         return false;
 434                 } elseif ( $this->section == 'new' ) {
 435                         // Nothing *to* preview for new sections
 436                         return false;
 437                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 438                         // Standard preference behaviour
 439                         return true;
 440                 } elseif ( !$this->mTitle->exists() &&
 441                   isset($wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]) &&
 442                   $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 443                 {
 444                         // Categories are special
 445                         return true;
 446                 } else {
 447                         return false;
 448                 }
 449         }
 450
 451         /**
 452          * Checks whether the user entered a skin name in uppercase,
 453          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 454          *
 455          * @return bool
 456          */
 457         protected function isWrongCaseCssJsPage() {
 458                 if( $this->mTitle->isCssJsSubpage() ) {
 459                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 460                         $skins = array_merge(
 461                                 array_keys( Skin::getSkinNames() ),
 462                                 array( 'common' )
 463                         );
 464                         return !in_array( $name, $skins )
 465                                 && in_array( strtolower( $name ), $skins );
 466                 } else {
 467                         return false;
 468                 }
 469         }
 470
 471         /**
 472          * Does this EditPage class support section editing?
 473          * This is used by EditPage subclasses to indicate their ui cannot handle section edits
 474          *
 475          * @return bool
 476          */
 477         protected function isSectionEditSupported() {
 478                 return true;
 479         }
 480
 481         /**
 482          * This function collects the form data and uses it to populate various member variables.
 483          * @param $request WebRequest
 484          */
 485         function importFormData( &$request ) {
 486                 global $wgLang, $wgUser;
 487
 488                 wfProfileIn( __METHOD__ );
 489
 490                 # Section edit can come from either the form or a link
 491                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 492
 493                 if ( $request->wasPosted() ) {
 494                         # These fields need to be checked for encoding.
 495                         # Also remove trailing whitespace, but don't remove _initial_
 496                         # whitespace from the text boxes. This may be significant formatting.
 497                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 498                         if ( !$request->getCheck('wpTextbox2') ) {
 499                                 // Skip this if wpTextbox2 has input, it indicates that we came
 500                                 // from a conflict page with raw page text, not a custom form
 501                                 // modified by subclasses
 502                                 wfProfileIn( get_class($this)."::importContentFormData" );
 503                                 $textbox1 = $this->importContentFormData( $request );
 504                                 if ( isset($textbox1) )
 505                                         $this->textbox1 = $textbox1;
 506                                 wfProfileOut( get_class($this)."::importContentFormData" );
 507                         }
 508
 509                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 510                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary' ), 250 );
 511
 512                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 513                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 514                         # section titles.
 515                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 516
 517                         # Treat sectiontitle the same way as summary.
 518                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 519                         # currently doing double duty as both edit summary and section title. Right now this
 520                         # is just to allow API edits to work around this limitation, but this should be
 521                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 522                         $this->sectiontitle = $wgLang->truncate( $request->getText( 'wpSectionTitle' ), 250 );
 523                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 524
 525                         $this->edittime = $request->getVal( 'wpEdittime' );
 526                         $this->starttime = $request->getVal( 'wpStarttime' );
 527
 528                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 529
 530                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 531                                 // wpTextbox1 field is missing, possibly due to being "too big"
 532                                 // according to some filter rules such as Suhosin's setting for
 533                                 // suhosin.request.max_value_length (d'oh)
 534                                 $this->incompleteForm = true;
 535                         } else {
 536                                 // edittime should be one of our last fields; if it's missing,
 537                                 // the submission probably broke somewhere in the middle.
 538                                 $this->incompleteForm = is_null( $this->edittime );
 539                         }
 540                         if ( $this->incompleteForm ) {
 541                                 # If the form is incomplete, force to preview.
 542                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 543                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 544                                 $this->preview = true;
 545                         } else {
 546                                 /* Fallback for live preview */
 547                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 548                                 $this->diff = $request->getCheck( 'wpDiff' );
 549
 550                                 // Remember whether a save was requested, so we can indicate
 551                                 // if we forced preview due to session failure.
 552                                 $this->mTriedSave = !$this->preview;
 553
 554                                 if ( $this->tokenOk( $request ) ) {
 555                                         # Some browsers will not report any submit button
 556                                         # if the user hits enter in the comment box.
 557                                         # The unmarked state will be assumed to be a save,
 558                                         # if the form seems otherwise complete.
 559                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 560                                 } elseif ( $this->diff ) {
 561                                         # Failed token check, but only requested "Show Changes".
 562                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 563                                 } else {
 564                                         # Page might be a hack attempt posted from
 565                                         # an external site. Preview instead of saving.
 566                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 567                                         $this->preview = true;
 568                                 }
 569                         }
 570                         $this->save = !$this->preview && !$this->diff;
 571                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 572                                 $this->edittime = null;
 573                         }
 574
 575                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 576                                 $this->starttime = null;
 577                         }
 578
 579                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 580
 581                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 582                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 583
 584                         # Don't force edit summaries when a user is editing their own user or talk page
 585                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 586                                 $this->mTitle->getText() == $wgUser->getName() )
 587                         {
 588                                 $this->allowBlankSummary = true;
 589                         } else {
 590                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary');
 591                         }
 592
 593                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 594                 } else {
 595                         # Not a posted form? Start with nothing.
 596                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 597                         $this->textbox1     = '';
 598                         $this->summary      = '';
 599                         $this->sectiontitle = '';
 600                         $this->edittime     = '';
 601                         $this->starttime    = wfTimestampNow();
 602                         $this->edit         = false;
 603                         $this->preview      = false;
 604                         $this->save         = false;
 605                         $this->diff         = false;
 606                         $this->minoredit    = false;
 607                         $this->watchthis    = $request->getBool( 'watchthis', false ); // Watch may be overriden by request parameters
 608                         $this->recreate     = false;
 609
 610                         // When creating a new section, we can preload a section title by passing it as the
 611                         // preloadtitle parameter in the URL (Bug 13100)
 612                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 613                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 614                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 615                                 $this->summary = $request->getVal( 'preloadtitle' );
 616                         }
 617                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 618                                 $this->summary = $request->getText( 'summary' );
 619                         }
 620
 621                         if ( $request->getVal( 'minor' ) ) {
 622                                 $this->minoredit = true;
 623                         }
 624                 }
 625
 626                 $this->bot = $request->getBool( 'bot', true );
 627                 $this->nosummary = $request->getBool( 'nosummary' );
 628
 629                 $this->oldid = $request->getInt( 'oldid' );
 630
 631                 $this->live = $request->getCheck( 'live' );
 632                 $this->editintro = $request->getText( 'editintro',
 633                         // Custom edit intro for new sections
 634                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 635
 636                 // Allow extensions to modify form data
 637                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 638
 639                 wfProfileOut( __METHOD__ );
 640         }
 641
 642         /**
 643          * Subpage overridable method for extracting the page content data from the
 644          * posted form to be placed in $this->textbox1, if using customized input
 645          * this method should be overrided and return the page text that will be used
 646          * for saving, preview parsing and so on...
 647          *
 648          * @param $request WebRequest
 649          */
 650         protected function importContentFormData( &$request ) {
 651                 return; // Don't do anything, EditPage already extracted wpTextbox1
 652         }
 653
 654         /**
 655          * Initialise form fields in the object
 656          * Called on the first invocation, e.g. when a user clicks an edit link
 657          * @return bool -- if the requested section is valid
 658          */
 659         function initialiseForm() {
 660                 global $wgUser;
 661                 $this->edittime = $this->mArticle->getTimestamp();
 662                 $this->textbox1 = $this->getContent( false );
 663                 // activate checkboxes if user wants them to be always active
 664                 # Sort out the "watch" checkbox
 665                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 666                         # Watch all edits
 667                         $this->watchthis = true;
 668                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 669                         # Watch creations
 670                         $this->watchthis = true;
 671                 } elseif ( $this->mTitle->userIsWatching() ) {
 672                         # Already watched
 673                         $this->watchthis = true;
 674                 }
 675                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 676                         $this->minoredit = true;
 677                 }
 678                 if ( $this->textbox1 === false ) {
 679                         return false;
 680                 }
 681                 wfProxyCheck();
 682                 return true;
 683         }
 684
 685         /**
 686          * Fetch initial editing page content.
 687          *
 688          * @param $def_text string
 689          * @return mixed string on success, $def_text for invalid sections
 690          * @private
 691          */
 692         function getContent( $def_text = '' ) {
 693                 global $wgOut, $wgRequest, $wgParser;
 694
 695                 wfProfileIn( __METHOD__ );
 696
 697                 $text = false;
 698
 699                 // For message page not locally set, use the i18n message.
 700                 // For other non-existent articles, use preload text if any.
 701                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
 702                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
 703                                 # If this is a system message, get the default text.
 704                                 $text = $this->mTitle->getDefaultMessageText();
 705                         }
 706                         if ( $text === false ) {
 707                                 # If requested, preload some text.
 708                                 $preload = $wgRequest->getVal( 'preload',
 709                                         // Custom preload text for new sections
 710                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 711                                 $text = $this->getPreloadedText( $preload );
 712                         }
 713                 // For existing pages, get text based on "undo" or section parameters.
 714                 } else {
 715                         if ( $this->section != '' ) {
 716                                 // Get section edit text (returns $def_text for invalid sections)
 717                                 $text = $wgParser->getSection( $this->getOriginalContent(), $this->section, $def_text );
 718                         } else {
 719                                 $undoafter = $wgRequest->getInt( 'undoafter' );
 720                                 $undo = $wgRequest->getInt( 'undo' );
 721
 722                                 if ( $undo > 0 && $undoafter > 0 ) {
 723                                         if ( $undo < $undoafter ) {
 724                                                 # If they got undoafter and undo round the wrong way, switch them
 725                                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 726                                         }
 727
 728                                         $undorev = Revision::newFromId( $undo );
 729                                         $oldrev = Revision::newFromId( $undoafter );
 730
 731                                         # Sanity check, make sure it's the right page,
 732                                         # the revisions exist and they were not deleted.
 733                                         # Otherwise, $text will be left as-is.
 734                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 735                                                 $undorev->getPage() == $oldrev->getPage() &&
 736                                                 $undorev->getPage() == $this->mTitle->getArticleId() &&
 737                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 738                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 739
 740                                                 $text = $this->mArticle->getUndoText( $undorev, $oldrev );
 741                                                 if ( $text === false ) {
 742                                                         # Warn the user that something went wrong
 743                                                         $undoMsg = 'failure';
 744                                                 } else {
 745                                                         # Inform the user of our success and set an automatic edit summary
 746                                                         $undoMsg = 'success';
 747
 748                                                         # If we just undid one rev, use an autosummary
 749                                                         $firstrev = $oldrev->getNext();
 750                                                         if ( $firstrev->getId() == $undo ) {
 751                                                                 $undoSummary = wfMsgForContent( 'undo-summary', $undo, $undorev->getUserText() );
 752                                                                 if ( $this->summary === '' ) {
 753                                                                         $this->summary = $undoSummary;
 754                                                                 } else {
 755                                                                         $this->summary = $undoSummary . wfMsgForContent( 'colon-separator' ) . $this->summary;
 756                                                                 }
 757                                                                 $this->undidRev = $undo;
 758                                                         }
 759                                                         $this->formtype = 'diff';
 760                                                 }
 761                                         } else {
 762                                                 // Failed basic sanity checks.
 763                                                 // Older revisions may have been removed since the link
 764                                                 // was created, or we may simply have got bogus input.
 765                                                 $undoMsg = 'norev';
 766                                         }
 767
 768                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"error mw-undo-{$undoMsg}\">" .
 769                                                 wfMsgNoTrans( 'undo-' . $undoMsg ) . '</div>', true, /* interface */true );
 770                                 }
 771
 772                                 if ( $text === false ) {
 773                                         $text = $this->getOriginalContent();
 774                                 }
 775                         }
 776                 }
 777
 778                 wfProfileOut( __METHOD__ );
 779                 return $text;
 780         }
 781
 782         /**
 783          * Get the content of the wanted revision, without section extraction.
 784          *
 785          * The result of this function can be used to compare user's input with
 786          * section replaced in its context (using WikiPage::replaceSection())
 787          * to the original text of the edit.
 788          *
 789          * This difers from Article::getContent() that when a missing revision is
 790          * encountered the result will be an empty string and not the
 791          * 'missing-article' message.
 792          *
 793          * @since 1.19
 794          * @return string
 795          */
 796         private function getOriginalContent() {
 797                 if ( $this->section == 'new' ) {
 798                         return $this->getCurrentText();
 799                 }
 800                 $revision = $this->mArticle->getRevisionFetched();
 801                 if ( $revision === null ) {
 802                         return '';
 803                 }
 804                 return $this->mArticle->getContent();
 805         }
 806
 807         /**
 808          * Get the actual text of the page. This is basically similar to
 809          * WikiPage::getRawText() except that when the page doesn't exist an empty
 810          * string is returned instead of false.
 811          *
 812          * @since 1.19
 813          * @return string
 814          */
 815         private function getCurrentText() {
 816                 $text = $this->mArticle->getRawText();
 817                 if ( $text === false ) {
 818                         return '';
 819                 } else {
 820                         return $text;
 821                 }
 822         }
 823
 824         /**
 825          * Use this method before edit() to preload some text into the edit box
 826          *
 827          * @param $text string
 828          */
 829         public function setPreloadedText( $text ) {
 830                 $this->mPreloadText = $text;
 831         }
 832
 833         /**
 834          * Get the contents to be preloaded into the box, either set by
 835          * an earlier setPreloadText() or by loading the given page.
 836          *
 837          * @param $preload String: representing the title to preload from.
 838          * @return String
 839          */
 840         protected function getPreloadedText( $preload ) {
 841                 global $wgUser, $wgParser;
 842
 843                 if ( !empty( $this->mPreloadText ) ) {
 844                         return $this->mPreloadText;
 845                 }
 846
 847                 if ( $preload === '' ) {
 848                         return '';
 849                 }
 850
 851                 $title = Title::newFromText( $preload );
 852                 # Check for existence to avoid getting MediaWiki:Noarticletext
 853                 if ( $title === null || !$title->exists() || !$title->userCan( 'read' ) ) {
 854                         return '';
 855                 }
 856
 857                 $page = WikiPage::factory( $title );
 858                 if ( $page->isRedirect() ) {
 859                         $title = $page->getRedirectTarget();
 860                         # Same as before
 861                         if ( $title === null || !$title->exists() || !$title->userCan( 'read' ) ) {
 862                                 return '';
 863                         }
 864                         $page = WikiPage::factory( $title );
 865                 }
 866
 867                 $parserOptions = ParserOptions::newFromUser( $wgUser );
 868                 return $wgParser->getPreloadText( $page->getRawText(), $title, $parserOptions );
 869         }
 870
 871         /**
 872          * Make sure the form isn't faking a user's credentials.
 873          *
 874          * @param $request WebRequest
 875          * @return bool
 876          * @private
 877          */
 878         function tokenOk( &$request ) {
 879                 global $wgUser;
 880                 $token = $request->getVal( 'wpEditToken' );
 881                 $this->mTokenOk = $wgUser->matchEditToken( $token );
 882                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
 883                 return $this->mTokenOk;
 884         }
 885
 886         /**
 887          * Attempt submission
 888          * @return bool false if output is done, true if the rest of the form should be displayed
 889          */
 890         function attemptSave() {
 891                 global $wgUser, $wgOut;
 892
 893                 $resultDetails = false;
 894                 # Allow bots to exempt some edits from bot flagging
 895                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
 896                 $status = $this->internalAttemptSave( $resultDetails, $bot );
 897                 // FIXME: once the interface for internalAttemptSave() is made nicer, this should use the message in $status
 898
 899                 if ( $status->value == self::AS_SUCCESS_UPDATE || $status->value == self::AS_SUCCESS_NEW_ARTICLE ) {
 900                         $this->didSave = true;
 901                 }
 902
 903                 switch ( $status->value ) {
 904                         case self::AS_HOOK_ERROR_EXPECTED:
 905                         case self::AS_CONTENT_TOO_BIG:
 906                         case self::AS_ARTICLE_WAS_DELETED:
 907                         case self::AS_CONFLICT_DETECTED:
 908                         case self::AS_SUMMARY_NEEDED:
 909                         case self::AS_TEXTBOX_EMPTY:
 910                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
 911                         case self::AS_END:
 912                                 return true;
 913
 914                         case self::AS_HOOK_ERROR:
 915                         case self::AS_FILTERING:
 916                                 return false;
 917
 918                         case self::AS_SUCCESS_NEW_ARTICLE:
 919                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
 920                                 $anchor = isset ( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
 921                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
 922                                 return false;
 923
 924                         case self::AS_SUCCESS_UPDATE:
 925                                 $extraQuery = '';
 926                                 $sectionanchor = $resultDetails['sectionanchor'];
 927
 928                                 // Give extensions a chance to modify URL query on update
 929                                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this->mArticle, &$sectionanchor, &$extraQuery ) );
 930
 931                                 if ( $resultDetails['redirect'] ) {
 932                                         if ( $extraQuery == '' ) {
 933                                                 $extraQuery = 'redirect=no';
 934                                         } else {
 935                                                 $extraQuery = 'redirect=no&' . $extraQuery;
 936                                         }
 937                                 }
 938                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
 939                                 return false;
 940
 941                         case self::AS_BLANK_ARTICLE:
 942                                 $wgOut->redirect( $this->getContextTitle()->getFullURL() );
 943                                 return false;
 944
 945                         case self::AS_SPAM_ERROR:
 946                                 $this->spamPageWithContent( $resultDetails['spam'] );
 947                                 return false;
 948
 949                         case self::AS_BLOCKED_PAGE_FOR_USER:
 950                                 throw new UserBlockedError( $wgUser->mBlock );
 951
 952                         case self::AS_IMAGE_REDIRECT_ANON:
 953                         case self::AS_IMAGE_REDIRECT_LOGGED:
 954                                 throw new PermissionsError( 'upload' );
 955
 956                         case self::AS_READ_ONLY_PAGE_ANON:
 957                         case self::AS_READ_ONLY_PAGE_LOGGED:
 958                                 throw new PermissionsError( 'edit' );
 959
 960                         case self::AS_READ_ONLY_PAGE:
 961                                 throw new ReadOnlyError;
 962
 963                         case self::AS_RATE_LIMITED:
 964                                 throw new ThrottledError();
 965
 966                         case self::AS_NO_CREATE_PERMISSION:
 967                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
 968                                 throw new PermissionsError( $permission );
 969
 970                 }
 971                 return false;
 972         }
 973
 974         /**
 975          * Attempt submission (no UI)
 976          *
 977          * @param $result
 978          * @param $bot bool
 979          *
 980          * @return Status object, possibly with a message, but always with one of the AS_* constants in $status->value,
 981          *
 982          * FIXME: This interface is TERRIBLE, but hard to get rid of due to various error display idiosyncrasies. There are
 983          * also lots of cases where error metadata is set in the object and retrieved later instead of being returned, e.g.
 984          * AS_CONTENT_TOO_BIG and AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some time.
 985          */
 986         function internalAttemptSave( &$result, $bot = false ) {
 987                 global $wgFilterCallback, $wgUser, $wgRequest, $wgParser;
 988                 global $wgMaxArticleSize;
 989
 990                 $status = Status::newGood();
 991
 992                 wfProfileIn( __METHOD__  );
 993                 wfProfileIn( __METHOD__ . '-checks' );
 994
 995                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
 996                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
 997                         $status->fatal( 'hookaborted' );
 998                         $status->value = self::AS_HOOK_ERROR;
 999                         wfProfileOut( __METHOD__ . '-checks' );
1000                         wfProfileOut( __METHOD__  );
1001                         return $status;
1002                 }
1003
1004                 # Check image redirect
1005                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1006                         Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
1007                         !$wgUser->isAllowed( 'upload' ) ) {
1008                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1009                                 $status->setResult( false, $code );
1010
1011                                 wfProfileOut( __METHOD__ . '-checks' );
1012                                 wfProfileOut( __METHOD__  );
1013
1014                                 return $status;
1015                 }
1016
1017                 # Check for spam
1018                 $match = self::matchSummarySpamRegex( $this->summary );
1019                 if ( $match === false ) {
1020                         $match = self::matchSpamRegex( $this->textbox1 );
1021                 }
1022                 if ( $match !== false ) {
1023                         $result['spam'] = $match;
1024                         $ip = $wgRequest->getIP();
1025                         $pdbk = $this->mTitle->getPrefixedDBkey();
1026                         $match = str_replace( "\n", '', $match );
1027                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1028                         $status->fatal( 'spamprotectionmatch', $match );
1029                         $status->value = self::AS_SPAM_ERROR;
1030                         wfProfileOut( __METHOD__ . '-checks' );
1031                         wfProfileOut( __METHOD__ );
1032                         return $status;
1033                 }
1034                 if ( $wgFilterCallback && is_callable( $wgFilterCallback ) && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
1035                         # Error messages or other handling should be performed by the filter function
1036                         $status->setResult( false, self::AS_FILTERING );
1037                         wfProfileOut( __METHOD__ . '-checks' );
1038                         wfProfileOut( __METHOD__ );
1039                         return $status;
1040                 }
1041                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
1042                         # Error messages etc. could be handled within the hook...
1043                         $status->fatal( 'hookaborted' );
1044                         $status->value = self::AS_HOOK_ERROR;
1045                         wfProfileOut( __METHOD__ . '-checks' );
1046                         wfProfileOut( __METHOD__ );
1047                         return $status;
1048                 } elseif ( $this->hookError != '' ) {
1049                         # ...or the hook could be expecting us to produce an error
1050                         $status->fatal( 'hookaborted' );
1051                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1052                         wfProfileOut( __METHOD__ . '-checks' );
1053                         wfProfileOut( __METHOD__ );
1054                         return $status;
1055                 }
1056
1057                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1058                         // Auto-block user's IP if the account was "hard" blocked
1059                         $wgUser->spreadAnyEditBlock();
1060                         # Check block state against master, thus 'false'.
1061                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1062                         wfProfileOut( __METHOD__ . '-checks' );
1063                         wfProfileOut( __METHOD__ );
1064                         return $status;
1065                 }
1066
1067                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1068                 if ( $this->kblength > $wgMaxArticleSize ) {
1069                         // Error will be displayed by showEditForm()
1070                         $this->tooBig = true;
1071                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1072                         wfProfileOut( __METHOD__ . '-checks' );
1073                         wfProfileOut( __METHOD__ );
1074                         return $status;
1075                 }
1076
1077                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1078                         if ( $wgUser->isAnon() ) {
1079                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1080                                 wfProfileOut( __METHOD__ . '-checks' );
1081                                 wfProfileOut( __METHOD__ );
1082                                 return $status;
1083                         } else {
1084                                 $status->fatal( 'readonlytext' );
1085                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1086                                 wfProfileOut( __METHOD__ . '-checks' );
1087                                 wfProfileOut( __METHOD__ );
1088                                 return $status;
1089                         }
1090                 }
1091
1092                 if ( wfReadOnly() ) {
1093                         $status->fatal( 'readonlytext' );
1094                         $status->value = self::AS_READ_ONLY_PAGE;
1095                         wfProfileOut( __METHOD__ . '-checks' );
1096                         wfProfileOut( __METHOD__ );
1097                         return $status;
1098                 }
1099                 if ( $wgUser->pingLimiter() ) {
1100                         $status->fatal( 'actionthrottledtext' );
1101                         $status->value = self::AS_RATE_LIMITED;
1102                         wfProfileOut( __METHOD__ . '-checks' );
1103                         wfProfileOut( __METHOD__ );
1104                         return $status;
1105                 }
1106
1107                 # If the article has been deleted while editing, don't save it without
1108                 # confirmation
1109                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1110                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1111                         wfProfileOut( __METHOD__ . '-checks' );
1112                         wfProfileOut( __METHOD__ );
1113                         return $status;
1114                 }
1115
1116                 wfProfileOut( __METHOD__ . '-checks' );
1117
1118                 # If article is new, insert it.
1119                 $aid = $this->mTitle->getArticleID( Title::GAID_FOR_UPDATE );
1120                 $new = ( $aid == 0 );
1121
1122                 if ( $new ) {
1123                         // Late check for create permission, just in case *PARANOIA*
1124                         if ( !$this->mTitle->userCan( 'create' ) ) {
1125                                 $status->fatal( 'nocreatetext' );
1126                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1127                                 wfDebug( __METHOD__ . ": no create permission\n" );
1128                                 wfProfileOut( __METHOD__ );
1129                                 return $status;
1130                         }
1131
1132                         # Don't save a new article if it's blank.
1133                         if ( $this->textbox1 == '' ) {
1134                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1135                                 wfProfileOut( __METHOD__ );
1136                                 return $status;
1137                         }
1138
1139                         // Run post-section-merge edit filter
1140                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
1141                                 # Error messages etc. could be handled within the hook...
1142                                 $status->fatal( 'hookaborted' );
1143                                 $status->value = self::AS_HOOK_ERROR;
1144                                 wfProfileOut( __METHOD__ );
1145                                 return $status;
1146                         } elseif ( $this->hookError != '' ) {
1147                                 # ...or the hook could be expecting us to produce an error
1148                                 $status->fatal( 'hookaborted' );
1149                                 $status->value = self::AS_HOOK_ERROR_EXPECTED;
1150                                 wfProfileOut( __METHOD__ );
1151                                 return $status;
1152                         }
1153
1154                         # Handle the user preference to force summaries here. Check if it's not a redirect.
1155                         if ( !$this->allowBlankSummary && !Title::newFromRedirect( $this->textbox1 ) ) {
1156                                 if ( md5( $this->summary ) == $this->autoSumm ) {
1157                                         $this->missingSummary = true;
1158                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1159                                         $status->value = self::AS_SUMMARY_NEEDED;
1160                                         wfProfileOut( __METHOD__ );
1161                                         return $status;
1162                                 }
1163                         }
1164
1165                         $text = $this->textbox1;
1166                         $result['sectionanchor'] = '';
1167                         if ( $this->section == 'new' ) {
1168                                 if ( $this->sectiontitle !== '' ) {
1169                                         // Insert the section title above the content.
1170                                         $text = wfMsgForContent( 'newsectionheaderdefaultlevel', $this->sectiontitle ) . "\n\n" . $text;
1171
1172                                         // Jump to the new section
1173                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1174
1175                                         // If no edit summary was specified, create one automatically from the section
1176                                         // title and have it link to the new section. Otherwise, respect the summary as
1177                                         // passed.
1178                                         if ( $this->summary === '' ) {
1179                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1180                                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSectionTitle );
1181                                         }
1182                                 } elseif ( $this->summary !== '' ) {
1183                                         // Insert the section title above the content.
1184                                         $text = wfMsgForContent( 'newsectionheaderdefaultlevel', $this->summary ) . "\n\n" . $text;
1185
1186                                         // Jump to the new section
1187                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1188
1189                                         // Create a link to the new section from the edit summary.
1190                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1191                                         $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1192                                 }
1193                         }
1194
1195                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1196
1197                 } else {
1198
1199                         # Article exists. Check for edit conflict.
1200
1201                         $this->mArticle->clear(); # Force reload of dates, etc.
1202                         $timestamp = $this->mArticle->getTimestamp();
1203
1204                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1205
1206                         if ( $timestamp != $this->edittime ) {
1207                                 $this->isConflict = true;
1208                                 if ( $this->section == 'new' ) {
1209                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1210                                                 $this->mArticle->getComment() == $this->summary ) {
1211                                                 // Probably a duplicate submission of a new comment.
1212                                                 // This can happen when squid resends a request after
1213                                                 // a timeout but the first one actually went through.
1214                                                 wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
1215                                         } else {
1216                                                 // New comment; suppress conflict.
1217                                                 $this->isConflict = false;
1218                                                 wfDebug( __METHOD__ .": conflict suppressed; new section\n" );
1219                                         }
1220                                 } elseif ( $this->section == '' && $this->userWasLastToEdit( $wgUser->getId(), $this->edittime ) ) {
1221                                         # Suppress edit conflict with self, except for section edits where merging is required.
1222                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1223                                         $this->isConflict = false;
1224                                 }
1225                         }
1226
1227                         // If sectiontitle is set, use it, otherwise use the summary as the section title (for
1228                         // backwards compatibility with old forms/bots).
1229                         if ( $this->sectiontitle !== '' ) {
1230                                 $sectionTitle = $this->sectiontitle;
1231                         } else {
1232                                 $sectionTitle = $this->summary;
1233                         }
1234
1235                         if ( $this->isConflict ) {
1236                                 wfDebug( __METHOD__ . ": conflict! getting section '$this->section' for time '$this->edittime' (article time '{$timestamp}')\n" );
1237                                 $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $sectionTitle, $this->edittime );
1238                         } else {
1239                                 wfDebug( __METHOD__ . ": getting section '$this->section'\n" );
1240                                 $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $sectionTitle );
1241                         }
1242                         if ( is_null( $text ) ) {
1243                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1244                                 $this->isConflict = true;
1245                                 $text = $this->textbox1; // do not try to merge here!
1246                         } elseif ( $this->isConflict ) {
1247                                 # Attempt merge
1248                                 if ( $this->mergeChangesInto( $text ) ) {
1249                                         // Successful merge! Maybe we should tell the user the good news?
1250                                         $this->isConflict = false;
1251                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1252                                 } else {
1253                                         $this->section = '';
1254                                         $this->textbox1 = $text;
1255                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1256                                 }
1257                         }
1258
1259                         if ( $this->isConflict ) {
1260                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1261                                 wfProfileOut( __METHOD__ );
1262                                 return $status;
1263                         }
1264
1265                         // Run post-section-merge edit filter
1266                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError, $this->summary ) ) ) {
1267                                 # Error messages etc. could be handled within the hook...
1268                                 $status->fatal( 'hookaborted' );
1269                                 $status->value = self::AS_HOOK_ERROR;
1270                                 wfProfileOut( __METHOD__ );
1271                                 return $status;
1272                         } elseif ( $this->hookError != '' ) {
1273                                 # ...or the hook could be expecting us to produce an error
1274                                 $status->fatal( 'hookaborted' );
1275                                 $status->value = self::AS_HOOK_ERROR_EXPECTED;
1276                                 wfProfileOut( __METHOD__ );
1277                                 return $status;
1278                         }
1279
1280                         # Handle the user preference to force summaries here, but not for null edits
1281                         if ( $this->section != 'new' && !$this->allowBlankSummary
1282                                 && $this->getOriginalContent() != $text
1283                                 && !Title::newFromRedirect( $text ) ) # check if it's not a redirect
1284                         {
1285                                 if ( md5( $this->summary ) == $this->autoSumm ) {
1286                                         $this->missingSummary = true;
1287                                         $status->fatal( 'missingsummary' );
1288                                         $status->value = self::AS_SUMMARY_NEEDED;
1289                                         wfProfileOut( __METHOD__ );
1290                                         return $status;
1291                                 }
1292                         }
1293
1294                         # And a similar thing for new sections
1295                         if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1296                                 if ( trim( $this->summary ) == '' ) {
1297                                         $this->missingSummary = true;
1298                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1299                                         $status->value = self::AS_SUMMARY_NEEDED;
1300                                         wfProfileOut( __METHOD__ );
1301                                         return $status;
1302                                 }
1303                         }
1304
1305                         # All's well
1306                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1307                         $sectionanchor = '';
1308                         if ( $this->section == 'new' ) {
1309                                 if ( $this->textbox1 == '' ) {
1310                                         $this->missingComment = true;
1311                                         $status->fatal( 'missingcommenttext' );
1312                                         $status->value = self::AS_TEXTBOX_EMPTY;
1313                                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1314                                         wfProfileOut( __METHOD__ );
1315                                         return $status;
1316                                 }
1317                                 if ( $this->sectiontitle !== '' ) {
1318                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1319                                         // If no edit summary was specified, create one automatically from the section
1320                                         // title and have it link to the new section. Otherwise, respect the summary as
1321                                         // passed.
1322                                         if ( $this->summary === '' ) {
1323                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1324                                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSectionTitle );
1325                                         }
1326                                 } elseif ( $this->summary !== '' ) {
1327                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1328                                         # This is a new section, so create a link to the new section
1329                                         # in the revision summary.
1330                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1331                                         $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1332                                 }
1333                         } elseif ( $this->section != '' ) {
1334                                 # Try to get a section anchor from the section source, redirect to edited section if header found
1335                                 # XXX: might be better to integrate this into Article::replaceSection
1336                                 # for duplicate heading checking and maybe parsing
1337                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1338                                 # we can't deal with anchors, includes, html etc in the header for now,
1339                                 # headline would need to be parsed to improve this
1340                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1341                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1342                                 }
1343                         }
1344                         $result['sectionanchor'] = $sectionanchor;
1345                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1346
1347                         // Save errors may fall down to the edit form, but we've now
1348                         // merged the section into full text. Clear the section field
1349                         // so that later submission of conflict forms won't try to
1350                         // replace that into a duplicated mess.
1351                         $this->textbox1 = $text;
1352                         $this->section = '';
1353
1354                         $status->value = self::AS_SUCCESS_UPDATE;
1355                 }
1356
1357                 // Check for length errors again now that the section is merged in
1358                 $this->kblength = (int)( strlen( $text ) / 1024 );
1359                 if ( $this->kblength > $wgMaxArticleSize ) {
1360                         $this->tooBig = true;
1361                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1362                         wfProfileOut( __METHOD__ );
1363                         return $status;
1364                 }
1365
1366                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1367                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1368                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1369                         ( $bot ? EDIT_FORCE_BOT : 0 );
1370
1371                 $doEditStatus = $this->mArticle->doEdit( $text, $this->summary, $flags );
1372
1373                 if ( $doEditStatus->isOK() ) {
1374                         $result['redirect'] = Title::newFromRedirect( $text ) !== null;
1375                         $this->commitWatch();
1376                         wfProfileOut( __METHOD__ );
1377                         return $status;
1378                 } else {
1379                         $this->isConflict = true;
1380                         $doEditStatus->value = self::AS_END; // Destroys data doEdit() put in $status->value but who cares
1381                         wfProfileOut( __METHOD__ );
1382                         return $doEditStatus;
1383                 }
1384         }
1385
1386         /**
1387          * Commit the change of watch status
1388          */
1389         protected function commitWatch() {
1390                 global $wgUser;
1391                 if ( $this->watchthis xor $this->mTitle->userIsWatching() ) {
1392                         $dbw = wfGetDB( DB_MASTER );
1393                         $dbw->begin();
1394                         if ( $this->watchthis ) {
1395                                 WatchAction::doWatch( $this->mTitle, $wgUser );
1396                         } else {
1397                                 WatchAction::doUnwatch( $this->mTitle, $wgUser );
1398                         }
1399                         $dbw->commit();
1400                 }
1401         }
1402
1403         /**
1404          * Check if no edits were made by other users since
1405          * the time a user started editing the page. Limit to
1406          * 50 revisions for the sake of performance.
1407          *
1408          * @param $id int
1409          * @param $edittime string
1410          *
1411          * @return bool
1412          */
1413         protected function userWasLastToEdit( $id, $edittime ) {
1414                 if( !$id ) return false;
1415                 $dbw = wfGetDB( DB_MASTER );
1416                 $res = $dbw->select( 'revision',
1417                         'rev_user',
1418                         array(
1419                                 'rev_page' => $this->mTitle->getArticleId(),
1420                                 'rev_timestamp > '.$dbw->addQuotes( $dbw->timestamp($edittime) )
1421                         ),
1422                         __METHOD__,
1423                         array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
1424                 foreach ( $res as $row ) {
1425                         if( $row->rev_user != $id ) {
1426                                 return false;
1427                         }
1428                 }
1429                 return true;
1430         }
1431
1432         /**
1433          * @private
1434          * @todo document
1435          *
1436          * @parma $editText string
1437          *
1438          * @return bool
1439          */
1440         function mergeChangesInto( &$editText ){
1441                 wfProfileIn( __METHOD__ );
1442
1443                 $db = wfGetDB( DB_MASTER );
1444
1445                 // This is the revision the editor started from
1446                 $baseRevision = $this->getBaseRevision();
1447                 if ( is_null( $baseRevision ) ) {
1448                         wfProfileOut( __METHOD__ );
1449                         return false;
1450                 }
1451                 $baseText = $baseRevision->getText();
1452
1453                 // The current state, we want to merge updates into it
1454                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1455                 if ( is_null( $currentRevision ) ) {
1456                         wfProfileOut( __METHOD__ );
1457                         return false;
1458                 }
1459                 $currentText = $currentRevision->getText();
1460
1461                 $result = '';
1462                 if ( wfMerge( $baseText, $editText, $currentText, $result ) ) {
1463                         $editText = $result;
1464                         wfProfileOut( __METHOD__ );
1465                         return true;
1466                 } else {
1467                         wfProfileOut( __METHOD__ );
1468                         return false;
1469                 }
1470         }
1471
1472         /**
1473          * @return Revision
1474          */
1475         function getBaseRevision() {
1476                 if ( !$this->mBaseRevision ) {
1477                         $db = wfGetDB( DB_MASTER );
1478                         $baseRevision = Revision::loadFromTimestamp(
1479                                 $db, $this->mTitle, $this->edittime );
1480                         return $this->mBaseRevision = $baseRevision;
1481                 } else {
1482                         return $this->mBaseRevision;
1483                 }
1484         }
1485
1486         /**
1487          * Check given input text against $wgSpamRegex, and return the text of the first match.
1488          *
1489          * @param $text string
1490          *
1491          * @return string|false matching string or false
1492          */
1493         public static function matchSpamRegex( $text ) {
1494                 global $wgSpamRegex;
1495                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1496                 $regexes = (array)$wgSpamRegex;
1497                 return self::matchSpamRegexInternal( $text, $regexes );
1498         }
1499
1500         /**
1501          * Check given input text against $wgSpamRegex, and return the text of the first match.
1502          *
1503          * @parma $text string
1504          *
1505          * @return string|false  matching string or false
1506          */
1507         public static function matchSummarySpamRegex( $text ) {
1508                 global $wgSummarySpamRegex;
1509                 $regexes = (array)$wgSummarySpamRegex;
1510                 return self::matchSpamRegexInternal( $text, $regexes );
1511         }
1512
1513         /**
1514          * @param $text string
1515          * @param $regexes array
1516          * @return bool|string
1517          */
1518         protected static function matchSpamRegexInternal( $text, $regexes ) {
1519                 foreach( $regexes as $regex ) {
1520                         $matches = array();
1521                         if( preg_match( $regex, $text, $matches ) ) {
1522                                 return $matches[0];
1523                         }
1524                 }
1525                 return false;
1526         }
1527
1528         function setHeaders() {
1529                 global $wgOut;
1530                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1531                 if ( $this->isConflict ) {
1532                         $wgOut->setPageTitle( wfMessage( 'editconflict', $this->getContextTitle()->getPrefixedText() ) );
1533                 } elseif ( $this->section != '' ) {
1534                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1535                         $wgOut->setPageTitle( wfMessage( $msg, $this->getContextTitle()->getPrefixedText() ) );
1536                 } else {
1537                         # Use the title defined by DISPLAYTITLE magic word when present
1538                         if ( isset( $this->mParserOutput )
1539                          && ( $dt = $this->mParserOutput->getDisplayTitle() ) !== false ) {
1540                                 $title = $dt;
1541                         } else {
1542                                 $title = $this->getContextTitle()->getPrefixedText();
1543                         }
1544                         $wgOut->setPageTitle( wfMessage( 'editing', $title ) );
1545                 }
1546         }
1547
1548         /**
1549          * Show all applicable editing introductions
1550          */
1551         protected function showIntro() {
1552                 global $wgOut, $wgUser;
1553                 if ( $this->suppressIntro ) {
1554                         return;
1555                 }
1556
1557                 $namespace = $this->mTitle->getNamespace();
1558
1559                 if ( $namespace == NS_MEDIAWIKI ) {
1560                         # Show a warning if editing an interface message
1561                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
1562                 }
1563
1564                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
1565                 # Show log extract when the user is currently blocked
1566                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
1567                         $parts = explode( '/', $this->mTitle->getText(), 2 );
1568                         $username = $parts[0];
1569                         $user = User::newFromName( $username, false /* allow IP users*/ );
1570                         $ip = User::isIP( $username );
1571                         if ( !($user && $user->isLoggedIn()) && !$ip ) { # User does not exist
1572                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
1573                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
1574                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
1575                                 LogEventsList::showLogExtract(
1576                                         $wgOut,
1577                                         'block',
1578                                         $user->getUserPage(),
1579                                         '',
1580                                         array(
1581                                                 'lim' => 1,
1582                                                 'showIfEmpty' => false,
1583                                                 'msgKey' => array(
1584                                                         'blocked-notice-logextract',
1585                                                         $user->getName() # Support GENDER in notice
1586                                                 )
1587                                         )
1588                                 );
1589                         }
1590                 }
1591                 # Try to add a custom edit intro, or use the standard one if this is not possible.
1592                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
1593                         if ( $wgUser->isLoggedIn() ) {
1594                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
1595                         } else {
1596                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
1597                         }
1598                 }
1599                 # Give a notice if the user is editing a deleted/moved page...
1600                 if ( !$this->mTitle->exists() ) {
1601                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
1602                                 '', array( 'lim' => 10,
1603                                            'conds' => array( "log_action != 'revision'" ),
1604                                            'showIfEmpty' => false,
1605                                            'msgKey' => array( 'recreate-moveddeleted-warn') )
1606                         );
1607                 }
1608         }
1609
1610         /**
1611          * Attempt to show a custom editing introduction, if supplied
1612          *
1613          * @return bool
1614          */
1615         protected function showCustomIntro() {
1616                 if ( $this->editintro ) {
1617                         $title = Title::newFromText( $this->editintro );
1618                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
1619                                 global $wgOut;
1620                                 // Added using template syntax, to take <noinclude>'s into account.
1621                                 $wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
1622                                 return true;
1623                         } else {
1624                                 return false;
1625                         }
1626                 } else {
1627                         return false;
1628                 }
1629         }
1630
1631         /**
1632          * Send the edit form and related headers to $wgOut
1633          * @param $formCallback Callback that takes an OutputPage parameter; will be called
1634          *     during form output near the top, for captchas and the like.
1635          */
1636         function showEditForm( $formCallback = null ) {
1637                 global $wgOut, $wgUser;
1638
1639                 wfProfileIn( __METHOD__ );
1640
1641                 #need to parse the preview early so that we know which templates are used,
1642                 #otherwise users with "show preview after edit box" will get a blank list
1643                 #we parse this near the beginning so that setHeaders can do the title
1644                 #setting work instead of leaving it in getPreviewText
1645                 $previewOutput = '';
1646                 if ( $this->formtype == 'preview' ) {
1647                         $previewOutput = $this->getPreviewText();
1648                 }
1649
1650                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) );
1651
1652                 $this->setHeaders();
1653
1654                 # Enabled article-related sidebar, toplinks, etc.
1655                 $wgOut->setArticleRelated( true );
1656
1657                 if ( $this->showHeader() === false ) {
1658                         wfProfileOut( __METHOD__ );
1659                         return;
1660                 }
1661
1662                 $wgOut->addHTML( $this->editFormPageTop );
1663
1664                 if ( $wgUser->getOption( 'previewontop' ) ) {
1665                         $this->displayPreviewArea( $previewOutput, true );
1666                 }
1667
1668                 $wgOut->addHTML( $this->editFormTextTop );
1669
1670                 $showToolbar = true;
1671                 if ( $this->wasDeletedSinceLastEdit() ) {
1672                         if ( $this->formtype == 'save' ) {
1673                                 // Hide the toolbar and edit area, user can click preview to get it back
1674                                 // Add an confirmation checkbox and explanation.
1675                                 $showToolbar = false;
1676                         } else {
1677                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
1678                                         'deletedwhileediting' );
1679                         }
1680                 }
1681
1682                 $wgOut->addHTML( Html::openElement( 'form', array( 'id' => 'editform', 'name' => 'editform',
1683                         'method' => 'post', 'action' => $this->getActionURL( $this->getContextTitle() ),
1684                         'enctype' => 'multipart/form-data' ) ) );
1685
1686                 if ( is_callable( $formCallback ) ) {
1687                         call_user_func_array( $formCallback, array( &$wgOut ) );
1688                 }
1689
1690                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1691
1692                 // Put these up at the top to ensure they aren't lost on early form submission
1693                 $this->showFormBeforeText();
1694
1695                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
1696                         $username = $this->lastDelete->user_name;
1697                         $comment = $this->lastDelete->log_comment;
1698
1699                         // It is better to not parse the comment at all than to have templates expanded in the middle
1700                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
1701                         $key = $comment === ''
1702                                 ? 'confirmrecreate-noreason'
1703                                 : 'confirmrecreate';
1704                         $wgOut->addHTML(
1705                                 '<div class="mw-confirm-recreate">' .
1706                                 wfMsgExt( $key, 'parseinline', $username, "<nowiki>$comment</nowiki>" ) .
1707                                 Xml::checkLabel( wfMsg( 'recreate' ), 'wpRecreate', 'wpRecreate', false,
1708                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
1709                                 ) .
1710                                 '</div>'
1711                         );
1712                 }
1713
1714                 # If a blank edit summary was previously provided, and the appropriate
1715                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1716                 # user being bounced back more than once in the event that a summary
1717                 # is not required.
1718                 #####
1719                 # For a bit more sophisticated detection of blank summaries, hash the
1720                 # automatic one and pass that in the hidden field wpAutoSummary.
1721                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
1722                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
1723                 }
1724
1725                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1726                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
1727
1728                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
1729
1730                 if ( $this->section == 'new' ) {
1731                         $this->showSummaryInput( true, $this->summary );
1732                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
1733                 }
1734
1735                 $wgOut->addHTML( $this->editFormTextBeforeContent );
1736
1737                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
1738                         $wgOut->addHTML( EditPage::getEditToolbar() );
1739                 }
1740
1741                 if ( $this->isConflict ) {
1742                         // In an edit conflict bypass the overrideable content form method
1743                         // and fallback to the raw wpTextbox1 since editconflicts can't be
1744                         // resolved between page source edits and custom ui edits using the
1745                         // custom edit ui.
1746                         $this->textbox2 = $this->textbox1;
1747                         $this->textbox1 = $this->getCurrentText();
1748
1749                         $this->showTextbox1();
1750                 } else {
1751                         $this->showContentForm();
1752                 }
1753
1754                 $wgOut->addHTML( $this->editFormTextAfterContent );
1755
1756                 $wgOut->addWikiText( $this->getCopywarn() );
1757
1758                 $wgOut->addHTML( $this->editFormTextAfterWarn );
1759
1760                 $this->showStandardInputs();
1761
1762                 $this->showFormAfterText();
1763
1764                 $this->showTosSummary();
1765
1766                 $this->showEditTools();
1767
1768                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
1769
1770                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
1771                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
1772
1773                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
1774                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
1775
1776                 if ( $this->isConflict ) {
1777                         $this->showConflict();
1778                 }
1779
1780                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
1781
1782                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1783                         $this->displayPreviewArea( $previewOutput, false );
1784                 }
1785
1786                 wfProfileOut( __METHOD__ );
1787         }
1788
1789         /**
1790          * Extract the section title from current section text, if any.
1791          *
1792          * @param string $text
1793          * @return Mixed|string or false
1794          */
1795         public static function extractSectionTitle( $text ) {
1796                 preg_match( "/^(=+)(.+)\\1(\n|$)/i", $text, $matches );
1797                 if ( !empty( $matches[2] ) ) {
1798                         global $wgParser;
1799                         return $wgParser->stripSectionName(trim($matches[2]));
1800                 } else {
1801                         return false;
1802                 }
1803         }
1804
1805         protected function showHeader() {
1806                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
1807                 if ( $this->isConflict ) {
1808                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
1809                         $this->edittime = $this->mArticle->getTimestamp();
1810                 } else {
1811                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
1812                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
1813                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
1814                                 // Someone is welcome to try refactoring though
1815                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
1816                                 return false;
1817                         }
1818
1819                         if ( $this->section != '' && $this->section != 'new' ) {
1820                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
1821                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 );
1822                                         if ( $sectionTitle !== false ) {
1823                                                 $this->summary = "/* $sectionTitle */ ";
1824                                         }
1825                                 }
1826                         }
1827
1828                         if ( $this->missingComment ) {
1829                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
1830                         }
1831
1832                         if ( $this->missingSummary && $this->section != 'new' ) {
1833                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
1834                         }
1835
1836                         if ( $this->missingSummary && $this->section == 'new' ) {
1837                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
1838                         }
1839
1840                         if ( $this->hookError !== '' ) {
1841                                 $wgOut->addWikiText( $this->hookError );
1842                         }
1843
1844                         if ( !$this->checkUnicodeCompliantBrowser() ) {
1845                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
1846                         }
1847
1848                         if ( $this->section != 'new' ) {
1849                                 $revision = $this->mArticle->getRevisionFetched();
1850                                 if ( $revision ) {
1851                                         // Let sysop know that this will make private content public if saved
1852
1853                                         if ( !$revision->userCan( Revision::DELETED_TEXT ) ) {
1854                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
1855                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
1856                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
1857                                         }
1858
1859                                         if ( !$revision->isCurrent() ) {
1860                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
1861                                                 $wgOut->addWikiMsg( 'editingold' );
1862                                         }
1863                                 } elseif ( $this->mTitle->exists() ) {
1864                                         // Something went wrong
1865
1866                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
1867                                                 array( 'missing-article', $this->mTitle->getPrefixedText(),
1868                                                 wfMsgNoTrans( 'missingarticle-rev', $this->oldid ) ) );
1869                                 }
1870                         }
1871                 }
1872
1873                 if ( wfReadOnly() ) {
1874                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
1875                 } elseif ( $wgUser->isAnon() ) {
1876                         if ( $this->formtype != 'preview' ) {
1877                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
1878                         } else {
1879                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
1880                         }
1881                 } else {
1882                         if ( $this->isCssJsSubpage ) {
1883                                 # Check the skin exists
1884                                 if ( $this->isWrongCaseCssJsPage ) {
1885                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
1886                                 }
1887                                 if ( $this->formtype !== 'preview' ) {
1888                                         if ( $this->isCssSubpage )
1889                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
1890                                         if ( $this->isJsSubpage )
1891                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
1892                                 }
1893                         }
1894                 }
1895
1896                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
1897                         # Is the title semi-protected?
1898                         if ( $this->mTitle->isSemiProtected() ) {
1899                                 $noticeMsg = 'semiprotectedpagewarning';
1900                         } else {
1901                                 # Then it must be protected based on static groups (regular)
1902                                 $noticeMsg = 'protectedpagewarning';
1903                         }
1904                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
1905                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
1906                 }
1907                 if ( $this->mTitle->isCascadeProtected() ) {
1908                         # Is this page under cascading protection from some source pages?
1909                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1910                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
1911                         $cascadeSourcesCount = count( $cascadeSources );
1912                         if ( $cascadeSourcesCount > 0 ) {
1913                                 # Explain, and list the titles responsible
1914                                 foreach( $cascadeSources as $page ) {
1915                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1916                                 }
1917                         }
1918                         $notice .= '</div>';
1919                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
1920                 }
1921                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
1922                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
1923                                 array(  'lim' => 1,
1924                                         'showIfEmpty' => false,
1925                                         'msgKey' => array( 'titleprotectedwarning' ),
1926                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
1927                 }
1928
1929                 if ( $this->kblength === false ) {
1930                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1931                 }
1932
1933                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
1934                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
1935                                 array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
1936                 } else {
1937                         if( !wfMessage('longpage-hint')->isDisabled() ) {
1938                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
1939                                         array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
1940                                 );
1941                         }
1942                 }
1943         }
1944
1945         /**
1946          * Standard summary input and label (wgSummary), abstracted so EditPage
1947          * subclasses may reorganize the form.
1948          * Note that you do not need to worry about the label's for=, it will be
1949          * inferred by the id given to the input. You can remove them both by
1950          * passing array( 'id' => false ) to $userInputAttrs.
1951          *
1952          * @param $summary string The value of the summary input
1953          * @param $labelText string The html to place inside the label
1954          * @param $inputAttrs array of attrs to use on the input
1955          * @param $spanLabelAttrs array of attrs to use on the span inside the label
1956          *
1957          * @return array An array in the format array( $label, $input )
1958          */
1959         function getSummaryInput($summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null) {
1960                 //Note: the maxlength is overriden in JS to 250 and to make it use UTF-8 bytes, not characters.
1961                 $inputAttrs = ( is_array($inputAttrs) ? $inputAttrs : array() ) + array(
1962                         'id' => 'wpSummary',
1963                         'maxlength' => '200',
1964                         'tabindex' => '1',
1965                         'size' => 60,
1966                         'spellcheck' => 'true',
1967                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
1968
1969                 $spanLabelAttrs = ( is_array($spanLabelAttrs) ? $spanLabelAttrs : array() ) + array(
1970                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
1971                         'id' => "wpSummaryLabel"
1972                 );
1973
1974                 $label = null;
1975                 if ( $labelText ) {
1976                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
1977                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
1978                 }
1979
1980                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
1981
1982                 return array( $label, $input );
1983         }
1984
1985         /**
1986          * @param $isSubjectPreview Boolean: true if this is the section subject/title
1987          *                          up top, or false if this is the comment summary
1988          *                          down below the textarea
1989          * @param $summary String: The text of the summary to display
1990          * @return String
1991          */
1992         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
1993                 global $wgOut, $wgContLang;
1994                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
1995                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
1996                 if ( $isSubjectPreview ) {
1997                         if ( $this->nosummary ) {
1998                                 return;
1999                         }
2000                 } else {
2001                         if ( !$this->mShowSummaryField ) {
2002                                 return;
2003                         }
2004                 }
2005                 $summary = $wgContLang->recodeForEdit( $summary );
2006                 $labelText = wfMsgExt( $isSubjectPreview ? 'subject' : 'summary', 'parseinline' );
2007                 list($label, $input) = $this->getSummaryInput($summary, $labelText, array( 'class' => $summaryClass ), array());
2008                 $wgOut->addHTML("{$label} {$input}");
2009         }
2010
2011         /**
2012          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2013          *                          up top, or false if this is the comment summary
2014          *                          down below the textarea
2015          * @param $summary String: the text of the summary to display
2016          * @return String
2017          */
2018         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2019                 if ( !$summary || ( !$this->preview && !$this->diff ) )
2020                         return "";
2021
2022                 global $wgParser;
2023
2024                 if ( $isSubjectPreview )
2025                         $summary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $summary ) );
2026
2027                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2028
2029                 $summary = wfMsgExt( $message, 'parseinline' ) . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2030                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2031         }
2032
2033         protected function showFormBeforeText() {
2034                 global $wgOut;
2035                 $section = htmlspecialchars( $this->section );
2036                 $wgOut->addHTML( <<<HTML
2037 <input type='hidden' value="{$section}" name="wpSection" />
2038 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2039 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2040 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2041
2042 HTML
2043                 );
2044                 if ( !$this->checkUnicodeCompliantBrowser() )
2045                         $wgOut->addHTML(Html::hidden( 'safemode', '1' ));
2046         }
2047
2048         protected function showFormAfterText() {
2049                 global $wgOut, $wgUser;
2050                 /**
2051                  * To make it harder for someone to slip a user a page
2052                  * which submits an edit form to the wiki without their
2053                  * knowledge, a random token is associated with the login
2054                  * session. If it's not passed back with the submission,
2055                  * we won't save the page, or render user JavaScript and
2056                  * CSS previews.
2057                  *
2058                  * For anon editors, who may not have a session, we just
2059                  * include the constant suffix to prevent editing from
2060                  * broken text-mangling proxies.
2061                  */
2062                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2063         }
2064
2065         /**
2066          * Subpage overridable method for printing the form for page content editing
2067          * By default this simply outputs wpTextbox1
2068          * Subclasses can override this to provide a custom UI for editing;
2069          * be it a form, or simply wpTextbox1 with a modified content that will be
2070          * reverse modified when extracted from the post data.
2071          * Note that this is basically the inverse for importContentFormData
2072          */
2073         protected function showContentForm() {
2074                 $this->showTextbox1();
2075         }
2076
2077         /**
2078          * Method to output wpTextbox1
2079          * The $textoverride method can be used by subclasses overriding showContentForm
2080          * to pass back to this method.
2081          *
2082          * @param $customAttribs An array of html attributes to use in the textarea
2083          * @param $textoverride String: optional text to override $this->textarea1 with
2084          */
2085         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2086                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2087                         $attribs = array( 'style' => 'display:none;' );
2088                 } else {
2089                         $classes = array(); // Textarea CSS
2090                         if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2091                                 # Is the title semi-protected?
2092                                 if ( $this->mTitle->isSemiProtected() ) {
2093                                         $classes[] = 'mw-textarea-sprotected';
2094                                 } else {
2095                                         # Then it must be protected based on static groups (regular)
2096                                         $classes[] = 'mw-textarea-protected';
2097                                 }
2098                                 # Is the title cascade-protected?
2099                                 if ( $this->mTitle->isCascadeProtected() ) {
2100                                         $classes[] = 'mw-textarea-cprotected';
2101                                 }
2102                         }
2103
2104                         $attribs = array( 'tabindex' => 1 );
2105
2106                         if ( is_array( $customAttribs ) ) {
2107                                 $attribs += $customAttribs;
2108                         }
2109
2110                         if ( count( $classes ) ) {
2111                                 if ( isset( $attribs['class'] ) ) {
2112                                         $classes[] = $attribs['class'];
2113                                 }
2114                                 $attribs['class'] = implode( ' ', $classes );
2115                         }
2116                 }
2117
2118                 $this->showTextbox( $textoverride !== null ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
2119         }
2120
2121         protected function showTextbox2() {
2122                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2123         }
2124
2125         protected function showTextbox( $content, $name, $customAttribs = array() ) {
2126                 global $wgOut, $wgUser;
2127
2128                 $wikitext = $this->safeUnicodeOutput( $content );
2129                 if ( strval($wikitext) !== '' ) {
2130                         // Ensure there's a newline at the end, otherwise adding lines
2131                         // is awkward.
2132                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2133                         // mode will show an extra newline. A bit annoying.
2134                         $wikitext .= "\n";
2135                 }
2136
2137                 $attribs = $customAttribs + array(
2138                         'accesskey' => ',',
2139                         'id'   => $name,
2140                         'rows' => $wgUser->getIntOption( 'rows' ),
2141                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
2142                 );
2143
2144                 $pageLang = $this->mTitle->getPageLanguage();
2145                 $attribs['lang'] = $pageLang->getCode();
2146                 $attribs['dir'] = $pageLang->getDir();
2147
2148                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2149         }
2150
2151         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2152                 global $wgOut;
2153                 $classes = array();
2154                 if ( $isOnTop )
2155                         $classes[] = 'ontop';
2156
2157                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2158
2159                 if ( $this->formtype != 'preview' )
2160                         $attribs['style'] = 'display: none;';
2161
2162                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2163
2164                 if ( $this->formtype == 'preview' ) {
2165                         $this->showPreview( $previewOutput );
2166                 }
2167
2168                 $wgOut->addHTML( '</div>' );
2169
2170                 if ( $this->formtype == 'diff') {
2171                         $this->showDiff();
2172                 }
2173         }
2174
2175         /**
2176          * Append preview output to $wgOut.
2177          * Includes category rendering if this is a category page.
2178          *
2179          * @param $text String: the HTML to be output for the preview.
2180          */
2181         protected function showPreview( $text ) {
2182                 global $wgOut;
2183                 if ( $this->mTitle->getNamespace() == NS_CATEGORY) {
2184                         $this->mArticle->openShowCategory();
2185                 }
2186                 # This hook seems slightly odd here, but makes things more
2187                 # consistent for extensions.
2188                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
2189                 $wgOut->addHTML( $text );
2190                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2191                         $this->mArticle->closeShowCategory();
2192                 }
2193         }
2194
2195         /**
2196          * Get a diff between the current contents of the edit box and the
2197          * version of the page we're editing from.
2198          *
2199          * If this is a section edit, we'll replace the section as for final
2200          * save and then make a comparison.
2201          */
2202         function showDiff() {
2203                 global $wgUser, $wgContLang, $wgParser, $wgOut;
2204
2205                 $oldtext = $this->getOriginalContent();
2206                 $newtext = $this->mArticle->replaceSection(
2207                         $this->section, $this->textbox1, $this->summary, $this->edittime );
2208
2209                 wfRunHooks( 'EditPageGetDiffText', array( $this, &$newtext ) );
2210
2211                 $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
2212                 $newtext = $wgParser->preSaveTransform( $newtext, $this->mTitle, $wgUser, $popts );
2213
2214                 if ( $oldtext !== false  || $newtext != '' ) {
2215                         $oldtitle = wfMsgExt( 'currentrev', array( 'parseinline' ) );
2216                         $newtitle = wfMsgExt( 'yourtext', array( 'parseinline' ) );
2217
2218                         $de = new DifferenceEngine( $this->mArticle->getContext() );
2219                         $de->setText( $oldtext, $newtext );
2220                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2221                         $de->showDiffStyle();
2222                 } else {
2223                         $difftext = '';
2224                 }
2225
2226                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2227         }
2228
2229         /**
2230          * Give a chance for site and per-namespace customizations of
2231          * terms of service summary link that might exist separately
2232          * from the copyright notice.
2233          *
2234          * This will display between the save button and the edit tools,
2235          * so should remain short!
2236          */
2237         protected function showTosSummary() {
2238                 $msg = 'editpage-tos-summary';
2239                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
2240                 if( !wfMessage( $msg )->isDisabled() ) {
2241                         global $wgOut;
2242                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
2243                         $wgOut->addWikiMsg( $msg );
2244                         $wgOut->addHTML( '</div>' );
2245                 }
2246         }
2247
2248         protected function showEditTools() {
2249                 global $wgOut;
2250                 $wgOut->addHTML( '<div class="mw-editTools">' .
2251                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
2252                         '</div>' );
2253         }
2254
2255         protected function getCopywarn() {
2256                 global $wgRightsText;
2257                 if ( $wgRightsText ) {
2258                         $copywarnMsg = array( 'copyrightwarning',
2259                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
2260                                 $wgRightsText );
2261                 } else {
2262                         $copywarnMsg = array( 'copyrightwarning2',
2263                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
2264                 }
2265                 // Allow for site and per-namespace customization of contribution/copyright notice.
2266                 wfRunHooks( 'EditPageCopyrightWarning', array( $this->mTitle, &$copywarnMsg ) );
2267
2268                 return "<div id=\"editpage-copywarn\">\n" .
2269                         call_user_func_array("wfMsgNoTrans", $copywarnMsg) . "\n</div>";
2270         }
2271
2272         protected function showStandardInputs( &$tabindex = 2 ) {
2273                 global $wgOut;
2274                 $wgOut->addHTML( "<div class='editOptions'>\n" );
2275
2276                 if ( $this->section != 'new' ) {
2277                         $this->showSummaryInput( false, $this->summary );
2278                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
2279                 }
2280
2281                 $checkboxes = $this->getCheckboxes( $tabindex,
2282                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
2283                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
2284                 $wgOut->addHTML( "<div class='editButtons'>\n" );
2285                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
2286
2287                 $cancel = $this->getCancelLink();
2288                 if ( $cancel !== '' ) {
2289                         $cancel .= wfMsgExt( 'pipe-separator' , 'escapenoentities' );
2290                 }
2291                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ) );
2292                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
2293                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
2294                         htmlspecialchars( wfMsg( 'newwindow' ) );
2295                 $wgOut->addHTML( "      <span class='editHelp'>{$cancel}{$edithelp}</span>\n" );
2296                 $wgOut->addHTML( "</div><!-- editButtons -->\n</div><!-- editOptions -->\n" );
2297         }
2298
2299         /**
2300          * Show an edit conflict. textbox1 is already shown in showEditForm().
2301          * If you want to use another entry point to this function, be careful.
2302          */
2303         protected function showConflict() {
2304                 global $wgOut;
2305
2306                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
2307                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2308
2309                         $de = new DifferenceEngine( $this->mArticle->getContext() );
2310                         $de->setText( $this->textbox2, $this->textbox1 );
2311                         $de->showDiff( wfMsgExt( 'yourtext', 'parseinline' ), wfMsg( 'storedversion' ) );
2312
2313                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2314                         $this->showTextbox2();
2315                 }
2316         }
2317
2318         /**
2319          * @return string
2320          */
2321         public function getCancelLink() {
2322                 $cancelParams = array();
2323                 if ( !$this->isConflict && $this->oldid > 0 ) {
2324                         $cancelParams['oldid'] = $this->oldid;
2325                 }
2326
2327                 return Linker::linkKnown(
2328                         $this->getContextTitle(),
2329                         wfMsgExt( 'cancel', array( 'parseinline' ) ),
2330                         array( 'id' => 'mw-editform-cancel' ),
2331                         $cancelParams
2332                 );
2333         }
2334
2335         /**
2336          * Returns the URL to use in the form's action attribute.
2337          * This is used by EditPage subclasses when simply customizing the action
2338          * variable in the constructor is not enough. This can be used when the
2339          * EditPage lives inside of a Special page rather than a custom page action.
2340          *
2341          * @param $title Title object for which is being edited (where we go to for &action= links)
2342          * @return string
2343          */
2344         protected function getActionURL( Title $title ) {
2345                 return $title->getLocalURL( array( 'action' => $this->action ) );
2346         }
2347
2348         /**
2349          * Check if a page was deleted while the user was editing it, before submit.
2350          * Note that we rely on the logging table, which hasn't been always there,
2351          * but that doesn't matter, because this only applies to brand new
2352          * deletes.
2353          */
2354         protected function wasDeletedSinceLastEdit() {
2355                 if ( $this->deletedSinceEdit !== null ) {
2356                         return $this->deletedSinceEdit;
2357                 }
2358
2359                 $this->deletedSinceEdit = false;
2360
2361                 if ( $this->mTitle->isDeletedQuick() ) {
2362                         $this->lastDelete = $this->getLastDelete();
2363                         if ( $this->lastDelete ) {
2364                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
2365                                 if ( $deleteTime > $this->starttime ) {
2366                                         $this->deletedSinceEdit = true;
2367                                 }
2368                         }
2369                 }
2370
2371                 return $this->deletedSinceEdit;
2372         }
2373
2374         protected function getLastDelete() {
2375                 $dbr = wfGetDB( DB_SLAVE );
2376                 $data = $dbr->selectRow(
2377                         array( 'logging', 'user' ),
2378                         array( 'log_type',
2379                                    'log_action',
2380                                    'log_timestamp',
2381                                    'log_user',
2382                                    'log_namespace',
2383                                    'log_title',
2384                                    'log_comment',
2385                                    'log_params',
2386                                    'log_deleted',
2387                                    'user_name' ),
2388                         array( 'log_namespace' => $this->mTitle->getNamespace(),
2389                                    'log_title' => $this->mTitle->getDBkey(),
2390                                    'log_type' => 'delete',
2391                                    'log_action' => 'delete',
2392                                    'user_id=log_user' ),
2393                         __METHOD__,
2394                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
2395                 );
2396                 // Quick paranoid permission checks...
2397                 if( is_object( $data ) ) {
2398                         if( $data->log_deleted & LogPage::DELETED_USER )
2399                                 $data->user_name = wfMsgHtml( 'rev-deleted-user' );
2400                         if( $data->log_deleted & LogPage::DELETED_COMMENT )
2401                                 $data->log_comment = wfMsgHtml( 'rev-deleted-comment' );
2402                 }
2403                 return $data;
2404         }
2405
2406         /**
2407          * Get the rendered text for previewing.
2408          * @return string
2409          */
2410         function getPreviewText() {
2411                 global $wgOut, $wgUser, $wgParser, $wgRawHtml;
2412
2413                 wfProfileIn( __METHOD__ );
2414
2415                 if ( $wgRawHtml && !$this->mTokenOk ) {
2416                         // Could be an offsite preview attempt. This is very unsafe if
2417                         // HTML is enabled, as it could be an attack.
2418                         $parsedNote = '';
2419                         if ( $this->textbox1 !== '' ) {
2420                                 // Do not put big scary notice, if previewing the empty
2421                                 // string, which happens when you initially edit
2422                                 // a category page, due to automatic preview-on-open.
2423                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
2424                                         wfMsg( 'session_fail_preview_html' ) . "</div>", true, /* interface */true );
2425                         }
2426                         wfProfileOut( __METHOD__ );
2427                         return $parsedNote;
2428                 }
2429
2430                 if ( $this->mTriedSave && !$this->mTokenOk ) {
2431                         if ( $this->mTokenOkExceptSuffix ) {
2432                                 $note = wfMsg( 'token_suffix_mismatch' );
2433                         } else {
2434                                 $note = wfMsg( 'session_fail_preview' );
2435                         }
2436                 } elseif ( $this->incompleteForm ) {
2437                         $note = wfMsg( 'edit_form_incomplete' );
2438                 } else {
2439                         $note = wfMsg( 'previewnote' );
2440                 }
2441
2442                 $parserOptions = ParserOptions::newFromUser( $wgUser );
2443                 $parserOptions->setEditSection( false );
2444                 $parserOptions->setTidy( true );
2445                 $parserOptions->setIsPreview( true );
2446                 $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
2447
2448                 # don't parse non-wikitext pages, show message about preview
2449                 # 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?
2450
2451                 if ( $this->isCssJsSubpage || !$this->mTitle->isWikitextPage() ) {
2452                         if( $this->mTitle->isCssJsSubpage() ) {
2453                                 $level = 'user';
2454                         } elseif( $this->mTitle->isCssOrJsPage() ) {
2455                                 $level = 'site';
2456                         } else {
2457                                 $level = false;
2458                         }
2459
2460                         # Used messages to make sure grep find them:
2461                         # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
2462                         if( $level ) {
2463                                 if (preg_match( "/\\.css$/", $this->mTitle->getText() ) ) {
2464                                         $previewtext = "<div id='mw-{$level}csspreview'>\n" . wfMsg( "{$level}csspreview" ) . "\n</div>";
2465                                         $class = "mw-code mw-css";
2466                                 } elseif (preg_match( "/\\.js$/", $this->mTitle->getText() ) ) {
2467                                         $previewtext = "<div id='mw-{$level}jspreview'>\n" . wfMsg( "{$level}jspreview" ) . "\n</div>";
2468                                         $class = "mw-code mw-js";
2469                                 } else {
2470                                         throw new MWException( 'A CSS/JS (sub)page but which is not css nor js!' );
2471                                 }
2472                         }
2473
2474                         $parserOutput = $wgParser->parse( $previewtext, $this->mTitle, $parserOptions );
2475                         $previewHTML = $parserOutput->mText;
2476                         $previewHTML .= "<pre class=\"$class\" dir=\"ltr\">\n" . htmlspecialchars( $this->textbox1 ) . "\n</pre>\n";
2477                 } else {
2478                         $rt = Title::newFromRedirectArray( $this->textbox1 );
2479                         if ( $rt ) {
2480                                 $previewHTML = $this->mArticle->viewRedirect( $rt, false );
2481                         } else {
2482                                 $toparse = $this->textbox1;
2483
2484                                 # If we're adding a comment, we need to show the
2485                                 # summary as the headline
2486                                 if ( $this->section == "new" && $this->summary != "" ) {
2487                                         $toparse = wfMsgForContent( 'newsectionheaderdefaultlevel', $this->summary ) . "\n\n" . $toparse;
2488                                 }
2489
2490                                 wfRunHooks( 'EditPageGetPreviewText', array( $this, &$toparse ) );
2491
2492                                 $parserOptions->enableLimitReport();
2493
2494                                 $toparse = $wgParser->preSaveTransform( $toparse, $this->mTitle, $wgUser, $parserOptions );
2495                                 $parserOutput = $wgParser->parse( $toparse, $this->mTitle, $parserOptions );
2496
2497                                 $previewHTML = $parserOutput->getText();
2498                                 $this->mParserOutput = $parserOutput;
2499                                 $wgOut->addParserOutputNoText( $parserOutput );
2500
2501                                 if ( count( $parserOutput->getWarnings() ) ) {
2502                                         $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
2503                                 }
2504                         }
2505                 }
2506
2507                 if( $this->isConflict ) {
2508                         $conflict = '<h2 id="mw-previewconflict">' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
2509                 } else {
2510                         $conflict = '<hr />';
2511                 }
2512
2513                 $previewhead = "<div class='previewnote'>\n" .
2514                         '<h2 id="mw-previewheader">' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>" .
2515                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
2516
2517                 $pageLang = $this->mTitle->getPageLanguage();
2518                 $attribs = array( 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
2519                         'class' => 'mw-content-'.$pageLang->getDir() );
2520                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
2521
2522                 wfProfileOut( __METHOD__ );
2523                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
2524         }
2525
2526         /**
2527          * @return Array
2528          */
2529         function getTemplates() {
2530                 if ( $this->preview || $this->section != '' ) {
2531                         $templates = array();
2532                         if ( !isset( $this->mParserOutput ) ) {
2533                                 return $templates;
2534                         }
2535                         foreach( $this->mParserOutput->getTemplates() as $ns => $template) {
2536                                 foreach( array_keys( $template ) as $dbk ) {
2537                                         $templates[] = Title::makeTitle($ns, $dbk);
2538                                 }
2539                         }
2540                         return $templates;
2541                 } else {
2542                         return $this->mTitle->getTemplateLinksFrom();
2543                 }
2544         }
2545
2546         /**
2547          * Shows a bulletin board style toolbar for common editing functions.
2548          * It can be disabled in the user preferences.
2549          * The necessary JavaScript code can be found in skins/common/edit.js.
2550          *
2551          * @return string
2552          */
2553         static function getEditToolbar() {
2554                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
2555                 global $wgUseTeX, $wgEnableUploads, $wgForeignFileRepos;
2556
2557                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
2558
2559                 /**
2560                  * $toolarray is an array of arrays each of which includes the
2561                  * filename of the button image (without path), the opening
2562                  * tag, the closing tag, optionally a sample text that is
2563                  * inserted between the two when no selection is highlighted
2564                  * and.  The tip text is shown when the user moves the mouse
2565                  * over the button.
2566                  *
2567                  * Also here: accesskeys (key), which are not used yet until
2568                  * someone can figure out a way to make them work in
2569                  * IE. However, we should make sure these keys are not defined
2570                  * on the edit page.
2571                  */
2572                 $toolarray = array(
2573                         array(
2574                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
2575                                 'id'     => 'mw-editbutton-bold',
2576                                 'open'   => '\'\'\'',
2577                                 'close'  => '\'\'\'',
2578                                 'sample' => wfMsg( 'bold_sample' ),
2579                                 'tip'    => wfMsg( 'bold_tip' ),
2580                                 'key'    => 'B'
2581                         ),
2582                         array(
2583                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
2584                                 'id'     => 'mw-editbutton-italic',
2585                                 'open'   => '\'\'',
2586                                 'close'  => '\'\'',
2587                                 'sample' => wfMsg( 'italic_sample' ),
2588                                 'tip'    => wfMsg( 'italic_tip' ),
2589                                 'key'    => 'I'
2590                         ),
2591                         array(
2592                                 'image'  => $wgLang->getImageFile( 'button-link' ),
2593                                 'id'     => 'mw-editbutton-link',
2594                                 'open'   => '[[',
2595                                 'close'  => ']]',
2596                                 'sample' => wfMsg( 'link_sample' ),
2597                                 'tip'    => wfMsg( 'link_tip' ),
2598                                 'key'    => 'L'
2599                         ),
2600                         array(
2601                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
2602                                 'id'     => 'mw-editbutton-extlink',
2603                                 'open'   => '[',
2604                                 'close'  => ']',
2605                                 'sample' => wfMsg( 'extlink_sample' ),
2606                                 'tip'    => wfMsg( 'extlink_tip' ),
2607                                 'key'    => 'X'
2608                         ),
2609                         array(
2610                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
2611                                 'id'     => 'mw-editbutton-headline',
2612                                 'open'   => "\n== ",
2613                                 'close'  => " ==\n",
2614                                 'sample' => wfMsg( 'headline_sample' ),
2615                                 'tip'    => wfMsg( 'headline_tip' ),
2616                                 'key'    => 'H'
2617                         ),
2618                         $imagesAvailable ? array(
2619                                 'image'  => $wgLang->getImageFile( 'button-image' ),
2620                                 'id'     => 'mw-editbutton-image',
2621                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
2622                                 'close'  => ']]',
2623                                 'sample' => wfMsg( 'image_sample' ),
2624                                 'tip'    => wfMsg( 'image_tip' ),
2625                                 'key'    => 'D',
2626                         ) : false,
2627                         $imagesAvailable ? array(
2628                                 'image'  => $wgLang->getImageFile( 'button-media' ),
2629                                 'id'     => 'mw-editbutton-media',
2630                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
2631                                 'close'  => ']]',
2632                                 'sample' => wfMsg( 'media_sample' ),
2633                                 'tip'    => wfMsg( 'media_tip' ),
2634                                 'key'    => 'M'
2635                         ) : false,
2636                         $wgUseTeX ?     array(
2637                                 'image'  => $wgLang->getImageFile( 'button-math' ),
2638                                 'id'     => 'mw-editbutton-math',
2639                                 'open'   => "<math>",
2640                                 'close'  => "</math>",
2641                                 'sample' => wfMsg( 'math_sample' ),
2642                                 'tip'    => wfMsg( 'math_tip' ),
2643                                 'key'    => 'C'
2644                         ) : false,
2645                         array(
2646                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
2647                                 'id'     => 'mw-editbutton-nowiki',
2648                                 'open'   => "<nowiki>",
2649                                 'close'  => "</nowiki>",
2650                                 'sample' => wfMsg( 'nowiki_sample' ),
2651                                 'tip'    => wfMsg( 'nowiki_tip' ),
2652                                 'key'    => 'N'
2653                         ),
2654                         array(
2655                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
2656                                 'id'     => 'mw-editbutton-signature',
2657                                 'open'   => '--~~~~',
2658                                 'close'  => '',
2659                                 'sample' => '',
2660                                 'tip'    => wfMsg( 'sig_tip' ),
2661                                 'key'    => 'Y'
2662                         ),
2663                         array(
2664                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
2665                                 'id'     => 'mw-editbutton-hr',
2666                                 'open'   => "\n----\n",
2667                                 'close'  => '',
2668                                 'sample' => '',
2669                                 'tip'    => wfMsg( 'hr_tip' ),
2670                                 'key'    => 'R'
2671                         )
2672                 );
2673
2674                 $script = '';
2675                 foreach ( $toolarray as $tool ) {
2676                         if ( !$tool ) {
2677                                 continue;
2678                         }
2679
2680                         $params = array(
2681                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
2682                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
2683                                 // Older browsers show a "speedtip" type message only for ALT.
2684                                 // Ideally these should be different, realistically they
2685                                 // probably don't need to be.
2686                                 $tip = $tool['tip'],
2687                                 $open = $tool['open'],
2688                                 $close = $tool['close'],
2689                                 $sample = $tool['sample'],
2690                                 $cssId = $tool['id'],
2691                         );
2692
2693                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
2694                 }
2695                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
2696
2697                 $toolbar = '<div id="toolbar"></div>';
2698
2699                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
2700
2701                 return $toolbar;
2702         }
2703
2704         /**
2705          * Returns an array of html code of the following checkboxes:
2706          * minor and watch
2707          *
2708          * @param $tabindex Current tabindex
2709          * @param $checked Array of checkbox => bool, where bool indicates the checked
2710          *                 status of the checkbox
2711          *
2712          * @return array
2713          */
2714         public function getCheckboxes( &$tabindex, $checked ) {
2715                 global $wgUser;
2716
2717                 $checkboxes = array();
2718
2719                 // don't show the minor edit checkbox if it's a new page or section
2720                 if ( !$this->isNew ) {
2721                         $checkboxes['minor'] = '';
2722                         $minorLabel = wfMsgExt( 'minoredit', array( 'parseinline' ) );
2723                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
2724                                 $attribs = array(
2725                                         'tabindex'  => ++$tabindex,
2726                                         'accesskey' => wfMsg( 'accesskey-minoredit' ),
2727                                         'id'        => 'wpMinoredit',
2728                                 );
2729                                 $checkboxes['minor'] =
2730                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
2731                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
2732                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
2733                                         ">{$minorLabel}</label>";
2734                         }
2735                 }
2736
2737                 $watchLabel = wfMsgExt( 'watchthis', array( 'parseinline' ) );
2738                 $checkboxes['watch'] = '';
2739                 if ( $wgUser->isLoggedIn() ) {
2740                         $attribs = array(
2741                                 'tabindex'  => ++$tabindex,
2742                                 'accesskey' => wfMsg( 'accesskey-watch' ),
2743                                 'id'        => 'wpWatchthis',
2744                         );
2745                         $checkboxes['watch'] =
2746                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
2747                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
2748                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
2749                                 ">{$watchLabel}</label>";
2750                 }
2751                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
2752                 return $checkboxes;
2753         }
2754
2755         /**
2756          * Returns an array of html code of the following buttons:
2757          * save, diff, preview and live
2758          *
2759          * @param $tabindex Current tabindex
2760          *
2761          * @return array
2762          */
2763         public function getEditButtons( &$tabindex ) {
2764                 $buttons = array();
2765
2766                 $temp = array(
2767                         'id'        => 'wpSave',
2768                         'name'      => 'wpSave',
2769                         'type'      => 'submit',
2770                         'tabindex'  => ++$tabindex,
2771                         'value'     => wfMsg( 'savearticle' ),
2772                         'accesskey' => wfMsg( 'accesskey-save' ),
2773                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
2774                 );
2775                 $buttons['save'] = Xml::element('input', $temp, '');
2776
2777                 ++$tabindex; // use the same for preview and live preview
2778                 $temp = array(
2779                         'id'        => 'wpPreview',
2780                         'name'      => 'wpPreview',
2781                         'type'      => 'submit',
2782                         'tabindex'  => $tabindex,
2783                         'value'     => wfMsg( 'showpreview' ),
2784                         'accesskey' => wfMsg( 'accesskey-preview' ),
2785                         'title'     => wfMsg( 'tooltip-preview' ) . ' [' . wfMsg( 'accesskey-preview' ) . ']',
2786                 );
2787                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
2788                 $buttons['live'] = '';
2789
2790                 $temp = array(
2791                         'id'        => 'wpDiff',
2792                         'name'      => 'wpDiff',
2793                         'type'      => 'submit',
2794                         'tabindex'  => ++$tabindex,
2795                         'value'     => wfMsg( 'showdiff' ),
2796                         'accesskey' => wfMsg( 'accesskey-diff' ),
2797                         'title'     => wfMsg( 'tooltip-diff' ) . ' [' . wfMsg( 'accesskey-diff' ) . ']',
2798                 );
2799                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
2800
2801                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
2802                 return $buttons;
2803         }
2804
2805         /**
2806          * Output preview text only. This can be sucked into the edit page
2807          * via JavaScript, and saves the server time rendering the skin as
2808          * well as theoretically being more robust on the client (doesn't
2809          * disturb the edit box's undo history, won't eat your text on
2810          * failure, etc).
2811          *
2812          * @todo This doesn't include category or interlanguage links.
2813          *       Would need to enhance it a bit, <s>maybe wrap them in XML
2814          *       or something...</s> that might also require more skin
2815          *       initialization, so check whether that's a problem.
2816          */
2817         function livePreview() {
2818                 global $wgOut;
2819                 $wgOut->disable();
2820                 header( 'Content-type: text/xml; charset=utf-8' );
2821                 header( 'Cache-control: no-cache' );
2822
2823                 $previewText = $this->getPreviewText();
2824                 #$categories = $skin->getCategoryLinks();
2825
2826                 $s =
2827                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
2828                 Xml::tags( 'livepreview', null,
2829                         Xml::element( 'preview', null, $previewText )
2830                         #.      Xml::element( 'category', null, $categories )
2831                 );
2832                 echo $s;
2833         }
2834
2835         /**
2836          * Call the stock "user is blocked" page
2837          *
2838          * @deprecated in 1.19; throw an exception directly instead
2839          */
2840         function blockedPage() {
2841                 wfDeprecated( __METHOD__, '1.19' );
2842                 global $wgUser;
2843
2844                 throw new UserBlockedError( $wgUser->mBlock );
2845         }
2846
2847         /**
2848          * Produce the stock "please login to edit pages" page
2849          *
2850          * @deprecated in 1.19; throw an exception directly instead
2851          */
2852         function userNotLoggedInPage() {
2853                 wfDeprecated( __METHOD__, '1.19' );
2854                 throw new PermissionsError( 'edit' );
2855         }
2856
2857         /**
2858          * Show an error page saying to the user that he has insufficient permissions
2859          * to create a new page
2860          *
2861          * @deprecated in 1.19; throw an exception directly instead
2862          */
2863         function noCreatePermission() {
2864                 wfDeprecated( __METHOD__, '1.19' );
2865                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
2866                 throw new PermissionsError( $permission );
2867         }
2868
2869         /**
2870          * Creates a basic error page which informs the user that
2871          * they have attempted to edit a nonexistent section.
2872          */
2873         function noSuchSectionPage() {
2874                 global $wgOut;
2875
2876                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
2877
2878                 $res = wfMsgExt( 'nosuchsectiontext', 'parse', $this->section );
2879                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
2880                 $wgOut->addHTML( $res );
2881
2882                 $wgOut->returnToMain( false, $this->mTitle );
2883         }
2884
2885         /**
2886          * Produce the stock "your edit contains spam" page
2887          *
2888          * @param $match Text which triggered one or more filters
2889          * @deprecated since 1.17 Use method spamPageWithContent() instead
2890          */
2891         static function spamPage( $match = false ) {
2892                 wfDeprecated( __METHOD__, '1.17' );
2893
2894                 global $wgOut, $wgTitle;
2895
2896                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
2897
2898                 $wgOut->addHTML( '<div id="spamprotected">' );
2899                 $wgOut->addWikiMsg( 'spamprotectiontext' );
2900                 if ( $match ) {
2901                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
2902                 }
2903                 $wgOut->addHTML( '</div>' );
2904
2905                 $wgOut->returnToMain( false, $wgTitle );
2906         }
2907
2908         /**
2909          * Show "your edit contains spam" page with your diff and text
2910          *
2911          * @param $match Text which triggered one or more filters
2912          */
2913         public function spamPageWithContent( $match = false ) {
2914                 global $wgOut;
2915                 $this->textbox2 = $this->textbox1;
2916
2917                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
2918
2919                 $wgOut->addHTML( '<div id="spamprotected">' );
2920                 $wgOut->addWikiMsg( 'spamprotectiontext' );
2921                 if ( $match ) {
2922                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
2923                 }
2924                 $wgOut->addHTML( '</div>' );
2925
2926                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2927                 $de = new DifferenceEngine( $this->mArticle->getContext() );
2928                 $de->setText( $this->getCurrentText(), $this->textbox2 );
2929                 $de->showDiff( wfMsg( "storedversion" ), wfMsgExt( 'yourtext', 'parseinline' ) );
2930
2931                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2932                 $this->showTextbox2();
2933
2934                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
2935         }
2936
2937         /**
2938          * Format an anchor fragment as it would appear for a given section name
2939          * @param $text String
2940          * @return String
2941          * @private
2942          */
2943         function sectionAnchor( $text ) {
2944                 global $wgParser;
2945                 return $wgParser->guessSectionNameFromWikiText( $text );
2946         }
2947
2948         /**
2949          * Check if the browser is on a blacklist of user-agents known to
2950          * mangle UTF-8 data on form submission. Returns true if Unicode
2951          * should make it through, false if it's known to be a problem.
2952          * @return bool
2953          * @private
2954          */
2955         function checkUnicodeCompliantBrowser() {
2956                 global $wgBrowserBlackList;
2957                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
2958                         // No User-Agent header sent? Trust it by default...
2959                         return true;
2960                 }
2961                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
2962                 foreach ( $wgBrowserBlackList as $browser ) {
2963                         if ( preg_match($browser, $currentbrowser) ) {
2964                                 return false;
2965                         }
2966                 }
2967                 return true;
2968         }
2969
2970         /**
2971          * Filter an input field through a Unicode de-armoring process if it
2972          * came from an old browser with known broken Unicode editing issues.
2973          *
2974          * @param $request WebRequest
2975          * @param $field String
2976          * @return String
2977          * @private
2978          */
2979         function safeUnicodeInput( $request, $field ) {
2980                 $text = rtrim( $request->getText( $field ) );
2981                 return $request->getBool( 'safemode' )
2982                         ? $this->unmakesafe( $text )
2983                         : $text;
2984         }
2985
2986         /**
2987          * @param $request WebRequest
2988          * @param $text string
2989          * @return string
2990          */
2991         function safeUnicodeText( $request, $text ) {
2992                 $text = rtrim( $text );
2993                 return $request->getBool( 'safemode' )
2994                         ? $this->unmakesafe( $text )
2995                         : $text;
2996         }
2997
2998         /**
2999          * Filter an output field through a Unicode armoring process if it is
3000          * going to an old browser with known broken Unicode editing issues.
3001          *
3002          * @param $text String
3003          * @return String
3004          * @private
3005          */
3006         function safeUnicodeOutput( $text ) {
3007                 global $wgContLang;
3008                 $codedText = $wgContLang->recodeForEdit( $text );
3009                 return $this->checkUnicodeCompliantBrowser()
3010                         ? $codedText
3011                         : $this->makesafe( $codedText );
3012         }
3013
3014         /**
3015          * A number of web browsers are known to corrupt non-ASCII characters
3016          * in a UTF-8 text editing environment. To protect against this,
3017          * detected browsers will be served an armored version of the text,
3018          * with non-ASCII chars converted to numeric HTML character references.
3019          *
3020          * Preexisting such character references will have a 0 added to them
3021          * to ensure that round-trips do not alter the original data.
3022          *
3023          * @param $invalue String
3024          * @return String
3025          * @private
3026          */
3027         function makesafe( $invalue ) {
3028                 // Armor existing references for reversability.
3029                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
3030
3031                 $bytesleft = 0;
3032                 $result = "";
3033                 $working = 0;
3034                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
3035                         $bytevalue = ord( $invalue[$i] );
3036                         if ( $bytevalue <= 0x7F ) { //0xxx xxxx
3037                                 $result .= chr( $bytevalue );
3038                                 $bytesleft = 0;
3039                         } elseif ( $bytevalue <= 0xBF ) { //10xx xxxx
3040                                 $working = $working << 6;
3041                                 $working += ($bytevalue & 0x3F);
3042                                 $bytesleft--;
3043                                 if ( $bytesleft <= 0 ) {
3044                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3045                                 }
3046                         } elseif ( $bytevalue <= 0xDF ) { //110x xxxx
3047                                 $working = $bytevalue & 0x1F;
3048                                 $bytesleft = 1;
3049                         } elseif ( $bytevalue <= 0xEF ) { //1110 xxxx
3050                                 $working = $bytevalue & 0x0F;
3051                                 $bytesleft = 2;
3052                         } else { //1111 0xxx
3053                                 $working = $bytevalue & 0x07;
3054                                 $bytesleft = 3;
3055                         }
3056                 }
3057                 return $result;
3058         }
3059
3060         /**
3061          * Reverse the previously applied transliteration of non-ASCII characters
3062          * back to UTF-8. Used to protect data from corruption by broken web browsers
3063          * as listed in $wgBrowserBlackList.
3064          *
3065          * @param $invalue String
3066          * @return String
3067          * @private
3068          */
3069         function unmakesafe( $invalue ) {
3070                 $result = "";
3071                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
3072                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i+3] != '0' ) ) {
3073                                 $i += 3;
3074                                 $hexstring = "";
3075                                 do {
3076                                         $hexstring .= $invalue[$i];
3077                                         $i++;
3078                                 } while( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
3079
3080                                 // Do some sanity checks. These aren't needed for reversability,
3081                                 // but should help keep the breakage down if the editor
3082                                 // breaks one of the entities whilst editing.
3083                                 if ( (substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6) ) {
3084                                         $codepoint = hexdec($hexstring);
3085                                         $result .= codepointToUtf8( $codepoint );
3086                                 } else {
3087                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
3088                                 }
3089                         } else {
3090                                 $result .= substr( $invalue, $i, 1 );
3091                         }
3092                 }
3093                 // reverse the transform that we made for reversability reasons.
3094                 return strtr( $result, array( "&#x0" => "&#x" ) );
3095         }
3096 }