includes/EditPage.php

   1 <?php
   2 /**
   3  * Contains the EditPage class
   4  * @file
   5  */
   6
   7 /**
   8  * The edit page/HTML interface (split from Article)
   9  * The actual database and text munging is still in Article,
  10  * but it should get easier to call those from alternate
  11  * interfaces.
  12  *
  13  * EditPage cares about two distinct titles:
  14  * $this->mContextTitle is the page that forms submit to, links point to,
  15  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  16  * page in the database that is actually being edited. These are
  17  * usually the same, but they are now allowed to be different.
  18  *
  19  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  20  * headaches, which may be fatal.
  21  */
  22 class EditPage {
  23         const AS_SUCCESS_UPDATE            = 200;
  24         const AS_SUCCESS_NEW_ARTICLE       = 201;
  25         const AS_HOOK_ERROR                = 210;
  26         const AS_FILTERING                 = 211;
  27         const AS_HOOK_ERROR_EXPECTED       = 212;
  28         const AS_BLOCKED_PAGE_FOR_USER     = 215;
  29         const AS_CONTENT_TOO_BIG           = 216;
  30         const AS_USER_CANNOT_EDIT          = 217;
  31         const AS_READ_ONLY_PAGE_ANON       = 218;
  32         const AS_READ_ONLY_PAGE_LOGGED     = 219;
  33         const AS_READ_ONLY_PAGE            = 220;
  34         const AS_RATE_LIMITED              = 221;
  35         const AS_ARTICLE_WAS_DELETED       = 222;
  36         const AS_NO_CREATE_PERMISSION      = 223;
  37         const AS_BLANK_ARTICLE             = 224;
  38         const AS_CONFLICT_DETECTED         = 225;
  39         const AS_SUMMARY_NEEDED            = 226;
  40         const AS_TEXTBOX_EMPTY             = 228;
  41         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
  42         const AS_OK                        = 230;
  43         const AS_END                       = 231;
  44         const AS_SPAM_ERROR                = 232;
  45         const AS_IMAGE_REDIRECT_ANON       = 233;
  46         const AS_IMAGE_REDIRECT_LOGGED     = 234;
  47
  48         /**
  49          * @var Article
  50          */
  51         var $mArticle;
  52
  53         /**
  54          * @var Title
  55          */
  56         var $mTitle;
  57         private $mContextTitle = null;
  58         var $action = 'submit';
  59         var $isConflict = false;
  60         var $isCssJsSubpage = false;
  61         var $isCssSubpage = false;
  62         var $isJsSubpage = false;
  63         var $isWrongCaseCssJsPage = false;
  64         var $isNew = false; // new page or new section
  65         var $deletedSinceEdit;
  66         var $formtype;
  67         var $firsttime;
  68         var $lastDelete;
  69         var $mTokenOk = false;
  70         var $mTokenOkExceptSuffix = false;
  71         var $mTriedSave = false;
  72         var $incompleteForm = false;
  73         var $tooBig = false;
  74         var $kblength = false;
  75         var $missingComment = false;
  76         var $missingSummary = false;
  77         var $allowBlankSummary = false;
  78         var $autoSumm = '';
  79         var $hookError = '';
  80         #var $mPreviewTemplates;
  81
  82         /**
  83          * @var ParserOutput
  84          */
  85         var $mParserOutput;
  86
  87         var $mBaseRevision = false;
  88         var $mShowSummaryField = true;
  89
  90         # Form values
  91         var $save = false, $preview = false, $diff = false;
  92         var $minoredit = false, $watchthis = false, $recreate = false;
  93         var $textbox1 = '', $textbox2 = '', $summary = '', $nosummary = false;
  94         var $edittime = '', $section = '', $sectiontitle = '', $starttime = '';
  95         var $oldid = 0, $editintro = '', $scrolltop = null, $bot = true;
  96
  97         # Placeholders for text injection by hooks (must be HTML)
  98         # extensions should take care to _append_ to the present value
  99         public $editFormPageTop = ''; // Before even the preview
 100         public $editFormTextTop = '';
 101         public $editFormTextBeforeContent = '';
 102         public $editFormTextAfterWarn = '';
 103         public $editFormTextAfterTools = '';
 104         public $editFormTextBottom = '';
 105         public $editFormTextAfterContent = '';
 106         public $previewTextAfterContent = '';
 107         public $mPreloadText = '';
 108
 109         /* $didSave should be set to true whenever an article was succesfully altered. */
 110         public $didSave = false;
 111         public $undidRev = 0;
 112
 113         public $suppressIntro = false;
 114
 115         /**
 116          * @todo document
 117          * @param $article Article
 118          */
 119         public function __construct( $article ) {
 120                 $this->mArticle = $article;
 121                 $this->mTitle = $article->getTitle();
 122         }
 123
 124         /**
 125          * @return Article
 126          */
 127         public function getArticle() {
 128                 return $this->mArticle;
 129         }
 130
 131         /**
 132          * @since 1.19
 133          * @return Title
 134          */
 135         public function getTitle() {
 136                 return $this->mTitle;
 137         }
 138
 139         /**
 140          * Set the context Title object
 141          *
 142          * @param $title Title object or null
 143          */
 144         public function setContextTitle( $title ) {
 145                 $this->mContextTitle = $title;
 146         }
 147
 148         /**
 149          * Get the context title object.
 150          * If not set, $wgTitle will be returned. This behavior might changed in
 151          * the future to return $this->mTitle instead.
 152          *
 153          * @return Title object
 154          */
 155         public function getContextTitle() {
 156                 if ( is_null( $this->mContextTitle ) ) {
 157                         global $wgTitle;
 158                         return $wgTitle;
 159                 } else {
 160                         return $this->mContextTitle;
 161                 }
 162         }
 163
 164         function submit() {
 165                 $this->edit();
 166         }
 167
 168         /**
 169          * This is the function that gets called for "action=edit". It
 170          * sets up various member variables, then passes execution to
 171          * another function, usually showEditForm()
 172          *
 173          * The edit form is self-submitting, so that when things like
 174          * preview and edit conflicts occur, we get the same form back
 175          * with the extra stuff added.  Only when the final submission
 176          * is made and all is well do we actually save and redirect to
 177          * the newly-edited page.
 178          */
 179         function edit() {
 180                 global $wgOut, $wgRequest, $wgUser;
 181                 // Allow extensions to modify/prevent this form or submission
 182                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 183                         return;
 184                 }
 185
 186                 wfProfileIn( __METHOD__ );
 187                 wfDebug( __METHOD__.": enter\n" );
 188
 189                 // If they used redlink=1 and the page exists, redirect to the main article
 190                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 191                         $wgOut->redirect( $this->mTitle->getFullURL() );
 192                         wfProfileOut( __METHOD__ );
 193                         return;
 194                 }
 195
 196                 $this->importFormData( $wgRequest );
 197                 $this->firsttime = false;
 198
 199                 if ( $this->live ) {
 200                         $this->livePreview();
 201                         wfProfileOut( __METHOD__ );
 202                         return;
 203                 }
 204
 205                 if ( wfReadOnly() && $this->save ) {
 206                         // Force preview
 207                         $this->save = false;
 208                         $this->preview = true;
 209                 }
 210
 211                 if ( $this->save ) {
 212                         $this->formtype = 'save';
 213                 } elseif ( $this->preview ) {
 214                         $this->formtype = 'preview';
 215                 } elseif ( $this->diff ) {
 216                         $this->formtype = 'diff';
 217                 } else { # First time through
 218                         $this->firsttime = true;
 219                         if ( $this->previewOnOpen() ) {
 220                                 $this->formtype = 'preview';
 221                         } else {
 222                                 $this->formtype = 'initial';
 223                         }
 224                 }
 225
 226                 $permErrors = $this->getEditPermissionErrors();
 227                 if ( $permErrors ) {
 228                         wfDebug( __METHOD__ . ": User can't edit\n" );
 229                         // Auto-block user's IP if the account was "hard" blocked
 230                         $wgUser->spreadAnyEditBlock();
 231
 232                         $this->displayPermissionsError( $permErrors );
 233
 234                         wfProfileOut( __METHOD__ );
 235                         return;
 236                 }
 237
 238                 $wgOut->addModules( array( 'mediawiki.action.edit' ) );
 239
 240                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
 241                         $wgOut->addModules( 'mediawiki.legacy.preview' );
 242                 }
 243                 // Bug #19334: textarea jumps when editing articles in IE8
 244                 $wgOut->addStyle( 'common/IE80Fixes.css', 'screen', 'IE 8' );
 245
 246                 wfProfileIn( __METHOD__."-business-end" );
 247
 248                 $this->isConflict = false;
 249                 // css / js subpages of user pages get a special treatment
 250                 $this->isCssJsSubpage       = $this->mTitle->isCssJsSubpage();
 251                 $this->isCssSubpage         = $this->mTitle->isCssSubpage();
 252                 $this->isJsSubpage          = $this->mTitle->isJsSubpage();
 253                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 254                 $this->isNew                = !$this->mTitle->exists() || $this->section == 'new';
 255
 256                 # Show applicable editing introductions
 257                 if ( $this->formtype == 'initial' || $this->firsttime )
 258                         $this->showIntro();
 259
 260                 if ( $this->mTitle->isTalkPage() ) {
 261                         $wgOut->addWikiMsg( 'talkpagetext' );
 262                 }
 263
 264                 # Optional notices on a per-namespace and per-page basis
 265                 $editnotice_ns   = 'editnotice-'.$this->mTitle->getNamespace();
 266                 $editnotice_ns_message = wfMessage( $editnotice_ns )->inContentLanguage();
 267                 if ( $editnotice_ns_message->exists() ) {
 268                         $wgOut->addWikiText( $editnotice_ns_message->plain() );
 269                 }
 270                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
 271                         $parts = explode( '/', $this->mTitle->getDBkey() );
 272                         $editnotice_base = $editnotice_ns;
 273                         while ( count( $parts ) > 0 ) {
 274                                 $editnotice_base .= '-'.array_shift( $parts );
 275                                 $editnotice_base_msg = wfMessage( $editnotice_base )->inContentLanguage();
 276                                 if ( $editnotice_base_msg->exists() ) {
 277                                         $wgOut->addWikiText( $editnotice_base_msg->plain()  );
 278                                 }
 279                         }
 280                 } else {
 281                         # Even if there are no subpages in namespace, we still don't want / in MW ns.
 282                         $editnoticeText = $editnotice_ns . '-' . str_replace( '/', '-', $this->mTitle->getDBkey() );
 283                         $editnoticeMsg = wfMessage( $editnoticeText )->inContentLanguage();
 284                         if ( $editnoticeMsg->exists() ) {
 285                                 $wgOut->addWikiText( $editnoticeMsg->plain() );
 286                         }
 287                 }
 288
 289                 # Attempt submission here.  This will check for edit conflicts,
 290                 # and redundantly check for locked database, blocked IPs, etc.
 291                 # that edit() already checked just in case someone tries to sneak
 292                 # in the back door with a hand-edited submission URL.
 293
 294                 if ( 'save' == $this->formtype ) {
 295                         if ( !$this->attemptSave() ) {
 296                                 wfProfileOut( __METHOD__."-business-end" );
 297                                 wfProfileOut( __METHOD__ );
 298                                 return;
 299                         }
 300                 }
 301
 302                 # First time through: get contents, set time for conflict
 303                 # checking, etc.
 304                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 305                         if ( $this->initialiseForm() === false ) {
 306                                 $this->noSuchSectionPage();
 307                                 wfProfileOut( __METHOD__."-business-end" );
 308                                 wfProfileOut( __METHOD__ );
 309                                 return;
 310                         }
 311                         if ( !$this->mTitle->getArticleId() )
 312                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 313                         else
 314                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 315                 }
 316
 317                 $this->showEditForm();
 318                 wfProfileOut( __METHOD__."-business-end" );
 319                 wfProfileOut( __METHOD__ );
 320         }
 321
 322         /**
 323          * @return array
 324          */
 325         protected function getEditPermissionErrors() {
 326                 global $wgUser;
 327                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 328                 # Can this title be created?
 329                 if ( !$this->mTitle->exists() ) {
 330                         $permErrors = array_merge( $permErrors,
 331                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 332                 }
 333                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 334                 $remove = array();
 335                 foreach( $permErrors as $error ) {
 336                         if ( ( $this->preview || $this->diff ) &&
 337                                 ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' ) )
 338                         {
 339                                 $remove[] = $error;
 340                         }
 341                 }
 342                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 343                 return $permErrors;
 344         }
 345
 346         /**
 347          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 348          * but with the following differences:
 349          * - If redlink=1, the user will be redirect to the page
 350          * - If there is content to display or the error occurs while either saving,
 351          *   previewing or showing the difference, it will be a
 352          *   "View source for ..." page displaying the source code after the error message.
 353          *
 354          * @since 1.19
 355          * @param $permErrors Array of permissions errors, as returned by
 356          *                    Title::getUserPermissionsErrors().
 357          */
 358         protected function displayPermissionsError( array $permErrors ) {
 359                 global $wgRequest, $wgOut;
 360
 361                 if ( $wgRequest->getBool( 'redlink' ) ) {
 362                         // The edit page was reached via a red link.
 363                         // Redirect to the article page and let them click the edit tab if
 364                         // they really want a permission error.
 365                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 366                         return;
 367                 }
 368
 369                 $content = $this->getContent();
 370
 371                 # Use the normal message if there's nothing to display
 372                 if ( $this->firsttime && $content === '' ) {
 373                         $action = $this->mTitle->exists() ? 'edit' :
 374                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 375                         throw new PermissionsError( $action, $permErrors );
 376                 }
 377
 378                 $wgOut->setPageTitle( wfMessage( 'viewsource-title', $this->getContextTitle()->getPrefixedText() ) );
 379                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 380                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 381                 $wgOut->addHTML( "<hr />\n" );
 382
 383                 # If the user made changes, preserve them when showing the markup
 384                 # (This happens when a user is blocked during edit, for instance)
 385                 if ( !$this->firsttime ) {
 386                         $content = $this->textbox1;
 387                         $wgOut->addWikiMsg( 'viewyourtext' );
 388                 } else {
 389                         $wgOut->addWikiMsg( 'viewsourcetext' );
 390                 }
 391
 392                 $this->showTextbox( $content, 'wpTextbox1', array( 'readonly' ) );
 393
 394                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 395                         Linker::formatTemplates( $this->getTemplates() ) ) );
 396
 397                 if ( $this->mTitle->exists() ) {
 398                         $wgOut->returnToMain( null, $this->mTitle );
 399                 }
 400         }
 401
 402         /**
 403          * Show a read-only error
 404          * Parameters are the same as OutputPage:readOnlyPage()
 405          * Redirect to the article page if redlink=1
 406          * @deprecated in 1.19; use displayPermissionsError() instead
 407          */
 408         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 409                 wfDeprecated( __METHOD__, '1.19' );
 410
 411                 global $wgRequest, $wgOut;
 412                 if ( $wgRequest->getBool( 'redlink' ) ) {
 413                         // The edit page was reached via a red link.
 414                         // Redirect to the article page and let them click the edit tab if
 415                         // they really want a permission error.
 416                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 417                 } else {
 418                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 419                 }
 420         }
 421
 422         /**
 423          * Should we show a preview when the edit form is first shown?
 424          *
 425          * @return bool
 426          */
 427         protected function previewOnOpen() {
 428                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 429                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 430                         // Explicit override from request
 431                         return true;
 432                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 433                         // Explicit override from request
 434                         return false;
 435                 } elseif ( $this->section == 'new' ) {
 436                         // Nothing *to* preview for new sections
 437                         return false;
 438                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 439                         // Standard preference behaviour
 440                         return true;
 441                 } elseif ( !$this->mTitle->exists() &&
 442                   isset($wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]) &&
 443                   $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 444                 {
 445                         // Categories are special
 446                         return true;
 447                 } else {
 448                         return false;
 449                 }
 450         }
 451
 452         /**
 453          * Checks whether the user entered a skin name in uppercase,
 454          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 455          *
 456          * @return bool
 457          */
 458         protected function isWrongCaseCssJsPage() {
 459                 if( $this->mTitle->isCssJsSubpage() ) {
 460                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 461                         $skins = array_merge(
 462                                 array_keys( Skin::getSkinNames() ),
 463                                 array( 'common' )
 464                         );
 465                         return !in_array( $name, $skins )
 466                                 && in_array( strtolower( $name ), $skins );
 467                 } else {
 468                         return false;
 469                 }
 470         }
 471
 472         /**
 473          * Does this EditPage class support section editing?
 474          * This is used by EditPage subclasses to indicate their ui cannot handle section edits
 475          *
 476          * @return bool
 477          */
 478         protected function isSectionEditSupported() {
 479                 return true;
 480         }
 481
 482         /**
 483          * This function collects the form data and uses it to populate various member variables.
 484          * @param $request WebRequest
 485          */
 486         function importFormData( &$request ) {
 487                 global $wgLang, $wgUser;
 488
 489                 wfProfileIn( __METHOD__ );
 490
 491                 # Section edit can come from either the form or a link
 492                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 493
 494                 if ( $request->wasPosted() ) {
 495                         # These fields need to be checked for encoding.
 496                         # Also remove trailing whitespace, but don't remove _initial_
 497                         # whitespace from the text boxes. This may be significant formatting.
 498                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 499                         if ( !$request->getCheck('wpTextbox2') ) {
 500                                 // Skip this if wpTextbox2 has input, it indicates that we came
 501                                 // from a conflict page with raw page text, not a custom form
 502                                 // modified by subclasses
 503                                 wfProfileIn( get_class($this)."::importContentFormData" );
 504                                 $textbox1 = $this->importContentFormData( $request );
 505                                 if ( isset($textbox1) )
 506                                         $this->textbox1 = $textbox1;
 507                                 wfProfileOut( get_class($this)."::importContentFormData" );
 508                         }
 509
 510                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 511                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary' ), 250 );
 512
 513                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 514                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 515                         # section titles.
 516                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 517
 518                         # Treat sectiontitle the same way as summary.
 519                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 520                         # currently doing double duty as both edit summary and section title. Right now this
 521                         # is just to allow API edits to work around this limitation, but this should be
 522                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 523                         $this->sectiontitle = $wgLang->truncate( $request->getText( 'wpSectionTitle' ), 250 );
 524                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 525
 526                         $this->edittime = $request->getVal( 'wpEdittime' );
 527                         $this->starttime = $request->getVal( 'wpStarttime' );
 528
 529                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 530
 531                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 532                                 // wpTextbox1 field is missing, possibly due to being "too big"
 533                                 // according to some filter rules such as Suhosin's setting for
 534                                 // suhosin.request.max_value_length (d'oh)
 535                                 $this->incompleteForm = true;
 536                         } else {
 537                                 // edittime should be one of our last fields; if it's missing,
 538                                 // the submission probably broke somewhere in the middle.
 539                                 $this->incompleteForm = is_null( $this->edittime );
 540                         }
 541                         if ( $this->incompleteForm ) {
 542                                 # If the form is incomplete, force to preview.
 543                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 544                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 545                                 $this->preview = true;
 546                         } else {
 547                                 /* Fallback for live preview */
 548                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 549                                 $this->diff = $request->getCheck( 'wpDiff' );
 550
 551                                 // Remember whether a save was requested, so we can indicate
 552                                 // if we forced preview due to session failure.
 553                                 $this->mTriedSave = !$this->preview;
 554
 555                                 if ( $this->tokenOk( $request ) ) {
 556                                         # Some browsers will not report any submit button
 557                                         # if the user hits enter in the comment box.
 558                                         # The unmarked state will be assumed to be a save,
 559                                         # if the form seems otherwise complete.
 560                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 561                                 } elseif ( $this->diff ) {
 562                                         # Failed token check, but only requested "Show Changes".
 563                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 564                                 } else {
 565                                         # Page might be a hack attempt posted from
 566                                         # an external site. Preview instead of saving.
 567                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 568                                         $this->preview = true;
 569                                 }
 570                         }
 571                         $this->save = !$this->preview && !$this->diff;
 572                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 573                                 $this->edittime = null;
 574                         }
 575
 576                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 577                                 $this->starttime = null;
 578                         }
 579
 580                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 581
 582                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 583                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 584
 585                         # Don't force edit summaries when a user is editing their own user or talk page
 586                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 587                                 $this->mTitle->getText() == $wgUser->getName() )
 588                         {
 589                                 $this->allowBlankSummary = true;
 590                         } else {
 591                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary');
 592                         }
 593
 594                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 595                 } else {
 596                         # Not a posted form? Start with nothing.
 597                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 598                         $this->textbox1     = '';
 599                         $this->summary      = '';
 600                         $this->sectiontitle = '';
 601                         $this->edittime     = '';
 602                         $this->starttime    = wfTimestampNow();
 603                         $this->edit         = false;
 604                         $this->preview      = false;
 605                         $this->save         = false;
 606                         $this->diff         = false;
 607                         $this->minoredit    = false;
 608                         $this->watchthis    = $request->getBool( 'watchthis', false ); // Watch may be overriden by request parameters
 609                         $this->recreate     = false;
 610
 611                         // When creating a new section, we can preload a section title by passing it as the
 612                         // preloadtitle parameter in the URL (Bug 13100)
 613                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 614                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 615                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 616                                 $this->summary = $request->getVal( 'preloadtitle' );
 617                         }
 618                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 619                                 $this->summary = $request->getText( 'summary' );
 620                         }
 621
 622                         if ( $request->getVal( 'minor' ) ) {
 623                                 $this->minoredit = true;
 624                         }
 625                 }
 626
 627                 $this->bot = $request->getBool( 'bot', true );
 628                 $this->nosummary = $request->getBool( 'nosummary' );
 629
 630                 $this->oldid = $request->getInt( 'oldid' );
 631
 632                 $this->live = $request->getCheck( 'live' );
 633                 $this->editintro = $request->getText( 'editintro',
 634                         // Custom edit intro for new sections
 635                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 636
 637                 // Allow extensions to modify form data
 638                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 639
 640                 wfProfileOut( __METHOD__ );
 641         }
 642
 643         /**
 644          * Subpage overridable method for extracting the page content data from the
 645          * posted form to be placed in $this->textbox1, if using customized input
 646          * this method should be overrided and return the page text that will be used
 647          * for saving, preview parsing and so on...
 648          *
 649          * @param $request WebRequest
 650          */
 651         protected function importContentFormData( &$request ) {
 652                 return; // Don't do anything, EditPage already extracted wpTextbox1
 653         }
 654
 655         /**
 656          * Initialise form fields in the object
 657          * Called on the first invocation, e.g. when a user clicks an edit link
 658          * @return bool -- if the requested section is valid
 659          */
 660         function initialiseForm() {
 661                 global $wgUser;
 662                 $this->edittime = $this->mArticle->getTimestamp();
 663                 $this->textbox1 = $this->getContent( false );
 664                 // activate checkboxes if user wants them to be always active
 665                 # Sort out the "watch" checkbox
 666                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 667                         # Watch all edits
 668                         $this->watchthis = true;
 669                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 670                         # Watch creations
 671                         $this->watchthis = true;
 672                 } elseif ( $this->mTitle->userIsWatching() ) {
 673                         # Already watched
 674                         $this->watchthis = true;
 675                 }
 676                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 677                         $this->minoredit = true;
 678                 }
 679                 if ( $this->textbox1 === false ) {
 680                         return false;
 681                 }
 682                 wfProxyCheck();
 683                 return true;
 684         }
 685
 686         /**
 687          * Fetch initial editing page content.
 688          *
 689          * @param $def_text string
 690          * @return mixed string on success, $def_text for invalid sections
 691          * @private
 692          */
 693         function getContent( $def_text = '' ) {
 694                 global $wgOut, $wgRequest, $wgParser;
 695
 696                 wfProfileIn( __METHOD__ );
 697
 698                 $text = false;
 699
 700                 // For message page not locally set, use the i18n message.
 701                 // For other non-existent articles, use preload text if any.
 702                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
 703                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
 704                                 # If this is a system message, get the default text.
 705                                 $text = $this->mTitle->getDefaultMessageText();
 706                         }
 707                         if ( $text === false ) {
 708                                 # If requested, preload some text.
 709                                 $preload = $wgRequest->getVal( 'preload',
 710                                         // Custom preload text for new sections
 711                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 712                                 $text = $this->getPreloadedText( $preload );
 713                         }
 714                 // For existing pages, get text based on "undo" or section parameters.
 715                 } else {
 716                         if ( $this->section != '' ) {
 717                                 // Get section edit text (returns $def_text for invalid sections)
 718                                 $text = $wgParser->getSection( $this->getOriginalContent(), $this->section, $def_text );
 719                         } else {
 720                                 $undoafter = $wgRequest->getInt( 'undoafter' );
 721                                 $undo = $wgRequest->getInt( 'undo' );
 722
 723                                 if ( $undo > 0 && $undoafter > 0 ) {
 724                                         if ( $undo < $undoafter ) {
 725                                                 # If they got undoafter and undo round the wrong way, switch them
 726                                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 727                                         }
 728
 729                                         $undorev = Revision::newFromId( $undo );
 730                                         $oldrev = Revision::newFromId( $undoafter );
 731
 732                                         # Sanity check, make sure it's the right page,
 733                                         # the revisions exist and they were not deleted.
 734                                         # Otherwise, $text will be left as-is.
 735                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 736                                                 $undorev->getPage() == $oldrev->getPage() &&
 737                                                 $undorev->getPage() == $this->mTitle->getArticleId() &&
 738                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 739                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 740
 741                                                 $text = $this->mArticle->getUndoText( $undorev, $oldrev );
 742                                                 if ( $text === false ) {
 743                                                         # Warn the user that something went wrong
 744                                                         $undoMsg = 'failure';
 745                                                 } else {
 746                                                         # Inform the user of our success and set an automatic edit summary
 747                                                         $undoMsg = 'success';
 748
 749                                                         # If we just undid one rev, use an autosummary
 750                                                         $firstrev = $oldrev->getNext();
 751                                                         if ( $firstrev->getId() == $undo ) {
 752                                                                 $undoSummary = wfMsgForContent( 'undo-summary', $undo, $undorev->getUserText() );
 753                                                                 if ( $this->summary === '' ) {
 754                                                                         $this->summary = $undoSummary;
 755                                                                 } else {
 756                                                                         $this->summary = $undoSummary . wfMsgForContent( 'colon-separator' ) . $this->summary;
 757                                                                 }
 758                                                                 $this->undidRev = $undo;
 759                                                         }
 760                                                         $this->formtype = 'diff';
 761                                                 }
 762                                         } else {
 763                                                 // Failed basic sanity checks.
 764                                                 // Older revisions may have been removed since the link
 765                                                 // was created, or we may simply have got bogus input.
 766                                                 $undoMsg = 'norev';
 767                                         }
 768
 769                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"error mw-undo-{$undoMsg}\">" .
 770                                                 wfMsgNoTrans( 'undo-' . $undoMsg ) . '</div>', true, /* interface */true );
 771                                 }
 772
 773                                 if ( $text === false ) {
 774                                         $text = $this->getOriginalContent();
 775                                 }
 776                         }
 777                 }
 778
 779                 wfProfileOut( __METHOD__ );
 780                 return $text;
 781         }
 782
 783         /**
 784          * Get the content of the wanted revision, without section extraction.
 785          *
 786          * The result of this function can be used to compare user's input with
 787          * section replaced in its context (using WikiPage::replaceSection())
 788          * to the original text of the edit.
 789          *
 790          * This difers from Article::getContent() that when a missing revision is
 791          * encountered the result will be an empty string and not the
 792          * 'missing-article' message.
 793          *
 794          * @since 1.19
 795          * @return string
 796          */
 797         private function getOriginalContent() {
 798                 if ( $this->section == 'new' ) {
 799                         return $this->getCurrentText();
 800                 }
 801                 $revision = $this->mArticle->getRevisionFetched();
 802                 if ( $revision === null ) {
 803                         return '';
 804                 }
 805                 return $this->mArticle->getContent();
 806         }
 807
 808         /**
 809          * Get the actual text of the page. This is basically similar to
 810          * WikiPage::getRawText() except that when the page doesn't exist an empty
 811          * string is returned instead of false.
 812          *
 813          * @since 1.19
 814          * @return string
 815          */
 816         private function getCurrentText() {
 817                 $text = $this->mArticle->getRawText();
 818                 if ( $text === false ) {
 819                         return '';
 820                 } else {
 821                         return $text;
 822                 }
 823         }
 824
 825         /**
 826          * Use this method before edit() to preload some text into the edit box
 827          *
 828          * @param $text string
 829          */
 830         public function setPreloadedText( $text ) {
 831                 $this->mPreloadText = $text;
 832         }
 833
 834         /**
 835          * Get the contents to be preloaded into the box, either set by
 836          * an earlier setPreloadText() or by loading the given page.
 837          *
 838          * @param $preload String: representing the title to preload from.
 839          * @return String
 840          */
 841         protected function getPreloadedText( $preload ) {
 842                 global $wgUser, $wgParser;
 843
 844                 if ( !empty( $this->mPreloadText ) ) {
 845                         return $this->mPreloadText;
 846                 }
 847
 848                 if ( $preload === '' ) {
 849                         return '';
 850                 }
 851
 852                 $title = Title::newFromText( $preload );
 853                 # Check for existence to avoid getting MediaWiki:Noarticletext
 854                 if ( $title === null || !$title->exists() || !$title->userCan( 'read' ) ) {
 855                         return '';
 856                 }
 857
 858                 $page = WikiPage::factory( $title );
 859                 if ( $page->isRedirect() ) {
 860                         $title = $page->getRedirectTarget();
 861                         # Same as before
 862                         if ( $title === null || !$title->exists() || !$title->userCan( 'read' ) ) {
 863                                 return '';
 864                         }
 865                         $page = WikiPage::factory( $title );
 866                 }
 867
 868                 $parserOptions = ParserOptions::newFromUser( $wgUser );
 869                 return $wgParser->getPreloadText( $page->getRawText(), $title, $parserOptions );
 870         }
 871
 872         /**
 873          * Make sure the form isn't faking a user's credentials.
 874          *
 875          * @param $request WebRequest
 876          * @return bool
 877          * @private
 878          */
 879         function tokenOk( &$request ) {
 880                 global $wgUser;
 881                 $token = $request->getVal( 'wpEditToken' );
 882                 $this->mTokenOk = $wgUser->matchEditToken( $token );
 883                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
 884                 return $this->mTokenOk;
 885         }
 886
 887         /**
 888          * Attempt submission
 889          * @return bool false if output is done, true if the rest of the form should be displayed
 890          */
 891         function attemptSave() {
 892                 global $wgUser, $wgOut;
 893
 894                 $resultDetails = false;
 895                 # Allow bots to exempt some edits from bot flagging
 896                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
 897                 $status = $this->internalAttemptSave( $resultDetails, $bot );
 898                 // FIXME: once the interface for internalAttemptSave() is made nicer, this should use the message in $status
 899
 900                 if ( $status->value == self::AS_SUCCESS_UPDATE || $status->value == self::AS_SUCCESS_NEW_ARTICLE ) {
 901                         $this->didSave = true;
 902                 }
 903
 904                 switch ( $status->value ) {
 905                         case self::AS_HOOK_ERROR_EXPECTED:
 906                         case self::AS_CONTENT_TOO_BIG:
 907                         case self::AS_ARTICLE_WAS_DELETED:
 908                         case self::AS_CONFLICT_DETECTED:
 909                         case self::AS_SUMMARY_NEEDED:
 910                         case self::AS_TEXTBOX_EMPTY:
 911                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
 912                         case self::AS_END:
 913                                 return true;
 914
 915                         case self::AS_HOOK_ERROR:
 916                         case self::AS_FILTERING:
 917                                 return false;
 918
 919                         case self::AS_SUCCESS_NEW_ARTICLE:
 920                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
 921                                 $anchor = isset ( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
 922                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
 923                                 return false;
 924
 925                         case self::AS_SUCCESS_UPDATE:
 926                                 $extraQuery = '';
 927                                 $sectionanchor = $resultDetails['sectionanchor'];
 928
 929                                 // Give extensions a chance to modify URL query on update
 930                                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this->mArticle, &$sectionanchor, &$extraQuery ) );
 931
 932                                 if ( $resultDetails['redirect'] ) {
 933                                         if ( $extraQuery == '' ) {
 934                                                 $extraQuery = 'redirect=no';
 935                                         } else {
 936                                                 $extraQuery = 'redirect=no&' . $extraQuery;
 937                                         }
 938                                 }
 939                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
 940                                 return false;
 941
 942                         case self::AS_BLANK_ARTICLE:
 943                                 $wgOut->redirect( $this->getContextTitle()->getFullURL() );
 944                                 return false;
 945
 946                         case self::AS_SPAM_ERROR:
 947                                 $this->spamPageWithContent( $resultDetails['spam'] );
 948                                 return false;
 949
 950                         case self::AS_BLOCKED_PAGE_FOR_USER:
 951                                 throw new UserBlockedError( $wgUser->mBlock );
 952
 953                         case self::AS_IMAGE_REDIRECT_ANON:
 954                         case self::AS_IMAGE_REDIRECT_LOGGED:
 955                                 throw new PermissionsError( 'upload' );
 956
 957                         case self::AS_READ_ONLY_PAGE_ANON:
 958                         case self::AS_READ_ONLY_PAGE_LOGGED:
 959                                 throw new PermissionsError( 'edit' );
 960
 961                         case self::AS_READ_ONLY_PAGE:
 962                                 throw new ReadOnlyError;
 963
 964                         case self::AS_RATE_LIMITED:
 965                                 throw new ThrottledError();
 966
 967                         case self::AS_NO_CREATE_PERMISSION:
 968                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
 969                                 throw new PermissionsError( $permission );
 970
 971                 }
 972                 return false;
 973         }
 974
 975         /**
 976          * Attempt submission (no UI)
 977          *
 978          * @param $result
 979          * @param $bot bool
 980          *
 981          * @return Status object, possibly with a message, but always with one of the AS_* constants in $status->value,
 982          *
 983          * FIXME: This interface is TERRIBLE, but hard to get rid of due to various error display idiosyncrasies. There are
 984          * also lots of cases where error metadata is set in the object and retrieved later instead of being returned, e.g.
 985          * AS_CONTENT_TOO_BIG and AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some time.
 986          */
 987         function internalAttemptSave( &$result, $bot = false ) {
 988                 global $wgFilterCallback, $wgUser, $wgRequest, $wgParser;
 989                 global $wgMaxArticleSize;
 990
 991                 $status = Status::newGood();
 992
 993                 wfProfileIn( __METHOD__  );
 994                 wfProfileIn( __METHOD__ . '-checks' );
 995
 996                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
 997                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
 998                         $status->fatal( 'hookaborted' );
 999                         $status->value = self::AS_HOOK_ERROR;
1000                         wfProfileOut( __METHOD__ . '-checks' );
1001                         wfProfileOut( __METHOD__  );
1002                         return $status;
1003                 }
1004
1005                 # Check image redirect
1006                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1007                         Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
1008                         !$wgUser->isAllowed( 'upload' ) ) {
1009                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1010                                 $status->setResult( false, $code );
1011
1012                                 wfProfileOut( __METHOD__ . '-checks' );
1013                                 wfProfileOut( __METHOD__  );
1014
1015                                 return $status;
1016                 }
1017
1018                 # Check for spam
1019                 $match = self::matchSummarySpamRegex( $this->summary );
1020                 if ( $match === false ) {
1021                         $match = self::matchSpamRegex( $this->textbox1 );
1022                 }
1023                 if ( $match !== false ) {
1024                         $result['spam'] = $match;
1025                         $ip = $wgRequest->getIP();
1026                         $pdbk = $this->mTitle->getPrefixedDBkey();
1027                         $match = str_replace( "\n", '', $match );
1028                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1029                         $status->fatal( 'spamprotectionmatch', $match );
1030                         $status->value = self::AS_SPAM_ERROR;
1031                         wfProfileOut( __METHOD__ . '-checks' );
1032                         wfProfileOut( __METHOD__ );
1033                         return $status;
1034                 }
1035                 if ( $wgFilterCallback && is_callable( $wgFilterCallback ) && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
1036                         # Error messages or other handling should be performed by the filter function
1037                         $status->setResult( false, self::AS_FILTERING );
1038                         wfProfileOut( __METHOD__ . '-checks' );
1039                         wfProfileOut( __METHOD__ );
1040                         return $status;
1041                 }
1042                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
1043                         # Error messages etc. could be handled within the hook...
1044                         $status->fatal( 'hookaborted' );
1045                         $status->value = self::AS_HOOK_ERROR;
1046                         wfProfileOut( __METHOD__ . '-checks' );
1047                         wfProfileOut( __METHOD__ );
1048                         return $status;
1049                 } elseif ( $this->hookError != '' ) {
1050                         # ...or the hook could be expecting us to produce an error
1051                         $status->fatal( 'hookaborted' );
1052                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1053                         wfProfileOut( __METHOD__ . '-checks' );
1054                         wfProfileOut( __METHOD__ );
1055                         return $status;
1056                 }
1057
1058                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1059                         // Auto-block user's IP if the account was "hard" blocked
1060                         $wgUser->spreadAnyEditBlock();
1061                         # Check block state against master, thus 'false'.
1062                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1063                         wfProfileOut( __METHOD__ . '-checks' );
1064                         wfProfileOut( __METHOD__ );
1065                         return $status;
1066                 }
1067
1068                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1069                 if ( $this->kblength > $wgMaxArticleSize ) {
1070                         // Error will be displayed by showEditForm()
1071                         $this->tooBig = true;
1072                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1073                         wfProfileOut( __METHOD__ . '-checks' );
1074                         wfProfileOut( __METHOD__ );
1075                         return $status;
1076                 }
1077
1078                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1079                         if ( $wgUser->isAnon() ) {
1080                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1081                                 wfProfileOut( __METHOD__ . '-checks' );
1082                                 wfProfileOut( __METHOD__ );
1083                                 return $status;
1084                         } else {
1085                                 $status->fatal( 'readonlytext' );
1086                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1087                                 wfProfileOut( __METHOD__ . '-checks' );
1088                                 wfProfileOut( __METHOD__ );
1089                                 return $status;
1090                         }
1091                 }
1092
1093                 if ( wfReadOnly() ) {
1094                         $status->fatal( 'readonlytext' );
1095                         $status->value = self::AS_READ_ONLY_PAGE;
1096                         wfProfileOut( __METHOD__ . '-checks' );
1097                         wfProfileOut( __METHOD__ );
1098                         return $status;
1099                 }
1100                 if ( $wgUser->pingLimiter() ) {
1101                         $status->fatal( 'actionthrottledtext' );
1102                         $status->value = self::AS_RATE_LIMITED;
1103                         wfProfileOut( __METHOD__ . '-checks' );
1104                         wfProfileOut( __METHOD__ );
1105                         return $status;
1106                 }
1107
1108                 # If the article has been deleted while editing, don't save it without
1109                 # confirmation
1110                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1111                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1112                         wfProfileOut( __METHOD__ . '-checks' );
1113                         wfProfileOut( __METHOD__ );
1114                         return $status;
1115                 }
1116
1117                 wfProfileOut( __METHOD__ . '-checks' );
1118
1119                 # If article is new, insert it.
1120                 $aid = $this->mTitle->getArticleID( Title::GAID_FOR_UPDATE );
1121                 $new = ( $aid == 0 );
1122
1123                 if ( $new ) {
1124                         // Late check for create permission, just in case *PARANOIA*
1125                         if ( !$this->mTitle->userCan( 'create' ) ) {
1126                                 $status->fatal( 'nocreatetext' );
1127                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1128                                 wfDebug( __METHOD__ . ": no create permission\n" );
1129                                 wfProfileOut( __METHOD__ );
1130                                 return $status;
1131                         }
1132
1133                         # Don't save a new article if it's blank.
1134                         if ( $this->textbox1 == '' ) {
1135                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1136                                 wfProfileOut( __METHOD__ );
1137                                 return $status;
1138                         }
1139
1140                         // Run post-section-merge edit filter
1141                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
1142                                 # Error messages etc. could be handled within the hook...
1143                                 $status->fatal( 'hookaborted' );
1144                                 $status->value = self::AS_HOOK_ERROR;
1145                                 wfProfileOut( __METHOD__ );
1146                                 return $status;
1147                         } elseif ( $this->hookError != '' ) {
1148                                 # ...or the hook could be expecting us to produce an error
1149                                 $status->fatal( 'hookaborted' );
1150                                 $status->value = self::AS_HOOK_ERROR_EXPECTED;
1151                                 wfProfileOut( __METHOD__ );
1152                                 return $status;
1153                         }
1154
1155                         # Handle the user preference to force summaries here. Check if it's not a redirect.
1156                         if ( !$this->allowBlankSummary && !Title::newFromRedirect( $this->textbox1 ) ) {
1157                                 if ( md5( $this->summary ) == $this->autoSumm ) {
1158                                         $this->missingSummary = true;
1159                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1160                                         $status->value = self::AS_SUMMARY_NEEDED;
1161                                         wfProfileOut( __METHOD__ );
1162                                         return $status;
1163                                 }
1164                         }
1165
1166                         $text = $this->textbox1;
1167                         $result['sectionanchor'] = '';
1168                         if ( $this->section == 'new' ) {
1169                                 if ( $this->sectiontitle !== '' ) {
1170                                         // Insert the section title above the content.
1171                                         $text = wfMsgForContent( 'newsectionheaderdefaultlevel', $this->sectiontitle ) . "\n\n" . $text;
1172
1173                                         // Jump to the new section
1174                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1175
1176                                         // If no edit summary was specified, create one automatically from the section
1177                                         // title and have it link to the new section. Otherwise, respect the summary as
1178                                         // passed.
1179                                         if ( $this->summary === '' ) {
1180                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1181                                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSectionTitle );
1182                                         }
1183                                 } elseif ( $this->summary !== '' ) {
1184                                         // Insert the section title above the content.
1185                                         $text = wfMsgForContent( 'newsectionheaderdefaultlevel', $this->summary ) . "\n\n" . $text;
1186
1187                                         // Jump to the new section
1188                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1189
1190                                         // Create a link to the new section from the edit summary.
1191                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1192                                         $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1193                                 }
1194                         }
1195
1196                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1197
1198                 } else {
1199
1200                         # Article exists. Check for edit conflict.
1201
1202                         $this->mArticle->clear(); # Force reload of dates, etc.
1203                         $timestamp = $this->mArticle->getTimestamp();
1204
1205                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1206
1207                         if ( $timestamp != $this->edittime ) {
1208                                 $this->isConflict = true;
1209                                 if ( $this->section == 'new' ) {
1210                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1211                                                 $this->mArticle->getComment() == $this->summary ) {
1212                                                 // Probably a duplicate submission of a new comment.
1213                                                 // This can happen when squid resends a request after
1214                                                 // a timeout but the first one actually went through.
1215                                                 wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
1216                                         } else {
1217                                                 // New comment; suppress conflict.
1218                                                 $this->isConflict = false;
1219                                                 wfDebug( __METHOD__ .": conflict suppressed; new section\n" );
1220                                         }
1221                                 } elseif ( $this->section == '' && $this->userWasLastToEdit( $wgUser->getId(), $this->edittime ) ) {
1222                                         # Suppress edit conflict with self, except for section edits where merging is required.
1223                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1224                                         $this->isConflict = false;
1225                                 }
1226                         }
1227
1228                         // If sectiontitle is set, use it, otherwise use the summary as the section title (for
1229                         // backwards compatibility with old forms/bots).
1230                         if ( $this->sectiontitle !== '' ) {
1231                                 $sectionTitle = $this->sectiontitle;
1232                         } else {
1233                                 $sectionTitle = $this->summary;
1234                         }
1235
1236                         if ( $this->isConflict ) {
1237                                 wfDebug( __METHOD__ . ": conflict! getting section '$this->section' for time '$this->edittime' (article time '{$timestamp}')\n" );
1238                                 $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $sectionTitle, $this->edittime );
1239                         } else {
1240                                 wfDebug( __METHOD__ . ": getting section '$this->section'\n" );
1241                                 $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $sectionTitle );
1242                         }
1243                         if ( is_null( $text ) ) {
1244                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1245                                 $this->isConflict = true;
1246                                 $text = $this->textbox1; // do not try to merge here!
1247                         } elseif ( $this->isConflict ) {
1248                                 # Attempt merge
1249                                 if ( $this->mergeChangesInto( $text ) ) {
1250                                         // Successful merge! Maybe we should tell the user the good news?
1251                                         $this->isConflict = false;
1252                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1253                                 } else {
1254                                         $this->section = '';
1255                                         $this->textbox1 = $text;
1256                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1257                                 }
1258                         }
1259
1260                         if ( $this->isConflict ) {
1261                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1262                                 wfProfileOut( __METHOD__ );
1263                                 return $status;
1264                         }
1265
1266                         // Run post-section-merge edit filter
1267                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError, $this->summary ) ) ) {
1268                                 # Error messages etc. could be handled within the hook...
1269                                 $status->fatal( 'hookaborted' );
1270                                 $status->value = self::AS_HOOK_ERROR;
1271                                 wfProfileOut( __METHOD__ );
1272                                 return $status;
1273                         } elseif ( $this->hookError != '' ) {
1274                                 # ...or the hook could be expecting us to produce an error
1275                                 $status->fatal( 'hookaborted' );
1276                                 $status->value = self::AS_HOOK_ERROR_EXPECTED;
1277                                 wfProfileOut( __METHOD__ );
1278                                 return $status;
1279                         }
1280
1281                         # Handle the user preference to force summaries here, but not for null edits
1282                         if ( $this->section != 'new' && !$this->allowBlankSummary
1283                                 && $this->getOriginalContent() != $text
1284                                 && !Title::newFromRedirect( $text ) ) # check if it's not a redirect
1285                         {
1286                                 if ( md5( $this->summary ) == $this->autoSumm ) {
1287                                         $this->missingSummary = true;
1288                                         $status->fatal( 'missingsummary' );
1289                                         $status->value = self::AS_SUMMARY_NEEDED;
1290                                         wfProfileOut( __METHOD__ );
1291                                         return $status;
1292                                 }
1293                         }
1294
1295                         # And a similar thing for new sections
1296                         if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1297                                 if ( trim( $this->summary ) == '' ) {
1298                                         $this->missingSummary = true;
1299                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1300                                         $status->value = self::AS_SUMMARY_NEEDED;
1301                                         wfProfileOut( __METHOD__ );
1302                                         return $status;
1303                                 }
1304                         }
1305
1306                         # All's well
1307                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1308                         $sectionanchor = '';
1309                         if ( $this->section == 'new' ) {
1310                                 if ( $this->textbox1 == '' ) {
1311                                         $this->missingComment = true;
1312                                         $status->fatal( 'missingcommenttext' );
1313                                         $status->value = self::AS_TEXTBOX_EMPTY;
1314                                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1315                                         wfProfileOut( __METHOD__ );
1316                                         return $status;
1317                                 }
1318                                 if ( $this->sectiontitle !== '' ) {
1319                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1320                                         // If no edit summary was specified, create one automatically from the section
1321                                         // title and have it link to the new section. Otherwise, respect the summary as
1322                                         // passed.
1323                                         if ( $this->summary === '' ) {
1324                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1325                                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSectionTitle );
1326                                         }
1327                                 } elseif ( $this->summary !== '' ) {
1328                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1329                                         # This is a new section, so create a link to the new section
1330                                         # in the revision summary.
1331                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1332                                         $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1333                                 }
1334                         } elseif ( $this->section != '' ) {
1335                                 # Try to get a section anchor from the section source, redirect to edited section if header found
1336                                 # XXX: might be better to integrate this into Article::replaceSection
1337                                 # for duplicate heading checking and maybe parsing
1338                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1339                                 # we can't deal with anchors, includes, html etc in the header for now,
1340                                 # headline would need to be parsed to improve this
1341                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1342                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1343                                 }
1344                         }
1345                         $result['sectionanchor'] = $sectionanchor;
1346                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1347
1348                         // Save errors may fall down to the edit form, but we've now
1349                         // merged the section into full text. Clear the section field
1350                         // so that later submission of conflict forms won't try to
1351                         // replace that into a duplicated mess.
1352                         $this->textbox1 = $text;
1353                         $this->section = '';
1354
1355                         $status->value = self::AS_SUCCESS_UPDATE;
1356                 }
1357
1358                 // Check for length errors again now that the section is merged in
1359                 $this->kblength = (int)( strlen( $text ) / 1024 );
1360                 if ( $this->kblength > $wgMaxArticleSize ) {
1361                         $this->tooBig = true;
1362                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1363                         wfProfileOut( __METHOD__ );
1364                         return $status;
1365                 }
1366
1367                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1368                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1369                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1370                         ( $bot ? EDIT_FORCE_BOT : 0 );
1371
1372                 $doEditStatus = $this->mArticle->doEdit( $text, $this->summary, $flags );
1373
1374                 if ( $doEditStatus->isOK() ) {
1375                         $result['redirect'] = Title::newFromRedirect( $text ) !== null;
1376                         $this->commitWatch();
1377                         wfProfileOut( __METHOD__ );
1378                         return $status;
1379                 } else {
1380                         $this->isConflict = true;
1381                         $doEditStatus->value = self::AS_END; // Destroys data doEdit() put in $status->value but who cares
1382                         wfProfileOut( __METHOD__ );
1383                         return $doEditStatus;
1384                 }
1385         }
1386
1387         /**
1388          * Commit the change of watch status
1389          */
1390         protected function commitWatch() {
1391                 global $wgUser;
1392                 if ( $this->watchthis xor $this->mTitle->userIsWatching() ) {
1393                         $dbw = wfGetDB( DB_MASTER );
1394                         $dbw->begin();
1395                         if ( $this->watchthis ) {
1396                                 WatchAction::doWatch( $this->mTitle, $wgUser );
1397                         } else {
1398                                 WatchAction::doUnwatch( $this->mTitle, $wgUser );
1399                         }
1400                         $dbw->commit();
1401                 }
1402         }
1403
1404         /**
1405          * Check if no edits were made by other users since
1406          * the time a user started editing the page. Limit to
1407          * 50 revisions for the sake of performance.
1408          *
1409          * @param $id int
1410          * @param $edittime string
1411          *
1412          * @return bool
1413          */
1414         protected function userWasLastToEdit( $id, $edittime ) {
1415                 if( !$id ) return false;
1416                 $dbw = wfGetDB( DB_MASTER );
1417                 $res = $dbw->select( 'revision',
1418                         'rev_user',
1419                         array(
1420                                 'rev_page' => $this->mTitle->getArticleId(),
1421                                 'rev_timestamp > '.$dbw->addQuotes( $dbw->timestamp($edittime) )
1422                         ),
1423                         __METHOD__,
1424                         array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
1425                 foreach ( $res as $row ) {
1426                         if( $row->rev_user != $id ) {
1427                                 return false;
1428                         }
1429                 }
1430                 return true;
1431         }
1432
1433         /**
1434          * @private
1435          * @todo document
1436          *
1437          * @parma $editText string
1438          *
1439          * @return bool
1440          */
1441         function mergeChangesInto( &$editText ){
1442                 wfProfileIn( __METHOD__ );
1443
1444                 $db = wfGetDB( DB_MASTER );
1445
1446                 // This is the revision the editor started from
1447                 $baseRevision = $this->getBaseRevision();
1448                 if ( is_null( $baseRevision ) ) {
1449                         wfProfileOut( __METHOD__ );
1450                         return false;
1451                 }
1452                 $baseText = $baseRevision->getText();
1453
1454                 // The current state, we want to merge updates into it
1455                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1456                 if ( is_null( $currentRevision ) ) {
1457                         wfProfileOut( __METHOD__ );
1458                         return false;
1459                 }
1460                 $currentText = $currentRevision->getText();
1461
1462                 $result = '';
1463                 if ( wfMerge( $baseText, $editText, $currentText, $result ) ) {
1464                         $editText = $result;
1465                         wfProfileOut( __METHOD__ );
1466                         return true;
1467                 } else {
1468                         wfProfileOut( __METHOD__ );
1469                         return false;
1470                 }
1471         }
1472
1473         /**
1474          * @return Revision
1475          */
1476         function getBaseRevision() {
1477                 if ( !$this->mBaseRevision ) {
1478                         $db = wfGetDB( DB_MASTER );
1479                         $baseRevision = Revision::loadFromTimestamp(
1480                                 $db, $this->mTitle, $this->edittime );
1481                         return $this->mBaseRevision = $baseRevision;
1482                 } else {
1483                         return $this->mBaseRevision;
1484                 }
1485         }
1486
1487         /**
1488          * Check given input text against $wgSpamRegex, and return the text of the first match.
1489          *
1490          * @param $text string
1491          *
1492          * @return string|false matching string or false
1493          */
1494         public static function matchSpamRegex( $text ) {
1495                 global $wgSpamRegex;
1496                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1497                 $regexes = (array)$wgSpamRegex;
1498                 return self::matchSpamRegexInternal( $text, $regexes );
1499         }
1500
1501         /**
1502          * Check given input text against $wgSpamRegex, and return the text of the first match.
1503          *
1504          * @parma $text string
1505          *
1506          * @return string|false  matching string or false
1507          */
1508         public static function matchSummarySpamRegex( $text ) {
1509                 global $wgSummarySpamRegex;
1510                 $regexes = (array)$wgSummarySpamRegex;
1511                 return self::matchSpamRegexInternal( $text, $regexes );
1512         }
1513
1514         /**
1515          * @param $text string
1516          * @param $regexes array
1517          * @return bool|string
1518          */
1519         protected static function matchSpamRegexInternal( $text, $regexes ) {
1520                 foreach( $regexes as $regex ) {
1521                         $matches = array();
1522                         if( preg_match( $regex, $text, $matches ) ) {
1523                                 return $matches[0];
1524                         }
1525                 }
1526                 return false;
1527         }
1528
1529         function setHeaders() {
1530                 global $wgOut;
1531                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1532                 if ( $this->isConflict ) {
1533                         $wgOut->setPageTitle( wfMessage( 'editconflict', $this->getContextTitle()->getPrefixedText() ) );
1534                 } elseif ( $this->section != '' ) {
1535                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1536                         $wgOut->setPageTitle( wfMessage( $msg, $this->getContextTitle()->getPrefixedText() ) );
1537                 } else {
1538                         # Use the title defined by DISPLAYTITLE magic word when present
1539                         if ( isset( $this->mParserOutput )
1540                          && ( $dt = $this->mParserOutput->getDisplayTitle() ) !== false ) {
1541                                 $title = $dt;
1542                         } else {
1543                                 $title = $this->getContextTitle()->getPrefixedText();
1544                         }
1545                         $wgOut->setPageTitle( wfMessage( 'editing', $title ) );
1546                 }
1547         }
1548
1549         /**
1550          * Show all applicable editing introductions
1551          */
1552         protected function showIntro() {
1553                 global $wgOut, $wgUser;
1554                 if ( $this->suppressIntro ) {
1555                         return;
1556                 }
1557
1558                 $namespace = $this->mTitle->getNamespace();
1559
1560                 if ( $namespace == NS_MEDIAWIKI ) {
1561                         # Show a warning if editing an interface message
1562                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
1563                 }
1564
1565                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
1566                 # Show log extract when the user is currently blocked
1567                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
1568                         $parts = explode( '/', $this->mTitle->getText(), 2 );
1569                         $username = $parts[0];
1570                         $user = User::newFromName( $username, false /* allow IP users*/ );
1571                         $ip = User::isIP( $username );
1572                         if ( !($user && $user->isLoggedIn()) && !$ip ) { # User does not exist
1573                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
1574                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
1575                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
1576                                 LogEventsList::showLogExtract(
1577                                         $wgOut,
1578                                         'block',
1579                                         $user->getUserPage(),
1580                                         '',
1581                                         array(
1582                                                 'lim' => 1,
1583                                                 'showIfEmpty' => false,
1584                                                 'msgKey' => array(
1585                                                         'blocked-notice-logextract',
1586                                                         $user->getName() # Support GENDER in notice
1587                                                 )
1588                                         )
1589                                 );
1590                         }
1591                 }
1592                 # Try to add a custom edit intro, or use the standard one if this is not possible.
1593                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
1594                         if ( $wgUser->isLoggedIn() ) {
1595                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
1596                         } else {
1597                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
1598                         }
1599                 }
1600                 # Give a notice if the user is editing a deleted/moved page...
1601                 if ( !$this->mTitle->exists() ) {
1602                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
1603                                 '', array( 'lim' => 10,
1604                                            'conds' => array( "log_action != 'revision'" ),
1605                                            'showIfEmpty' => false,
1606                                            'msgKey' => array( 'recreate-moveddeleted-warn') )
1607                         );
1608                 }
1609         }
1610
1611         /**
1612          * Attempt to show a custom editing introduction, if supplied
1613          *
1614          * @return bool
1615          */
1616         protected function showCustomIntro() {
1617                 if ( $this->editintro ) {
1618                         $title = Title::newFromText( $this->editintro );
1619                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
1620                                 global $wgOut;
1621                                 // Added using template syntax, to take <noinclude>'s into account.
1622                                 $wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
1623                                 return true;
1624                         } else {
1625                                 return false;
1626                         }
1627                 } else {
1628                         return false;
1629                 }
1630         }
1631
1632         /**
1633          * Send the edit form and related headers to $wgOut
1634          * @param $formCallback Callback that takes an OutputPage parameter; will be called
1635          *     during form output near the top, for captchas and the like.
1636          */
1637         function showEditForm( $formCallback = null ) {
1638                 global $wgOut, $wgUser;
1639
1640                 wfProfileIn( __METHOD__ );
1641
1642                 #need to parse the preview early so that we know which templates are used,
1643                 #otherwise users with "show preview after edit box" will get a blank list
1644                 #we parse this near the beginning so that setHeaders can do the title
1645                 #setting work instead of leaving it in getPreviewText
1646                 $previewOutput = '';
1647                 if ( $this->formtype == 'preview' ) {
1648                         $previewOutput = $this->getPreviewText();
1649                 }
1650
1651                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) );
1652
1653                 $this->setHeaders();
1654
1655                 # Enabled article-related sidebar, toplinks, etc.
1656                 $wgOut->setArticleRelated( true );
1657
1658                 if ( $this->showHeader() === false ) {
1659                         wfProfileOut( __METHOD__ );
1660                         return;
1661                 }
1662
1663                 $wgOut->addHTML( $this->editFormPageTop );
1664
1665                 if ( $wgUser->getOption( 'previewontop' ) ) {
1666                         $this->displayPreviewArea( $previewOutput, true );
1667                 }
1668
1669                 $wgOut->addHTML( $this->editFormTextTop );
1670
1671                 $showToolbar = true;
1672                 if ( $this->wasDeletedSinceLastEdit() ) {
1673                         if ( $this->formtype == 'save' ) {
1674                                 // Hide the toolbar and edit area, user can click preview to get it back
1675                                 // Add an confirmation checkbox and explanation.
1676                                 $showToolbar = false;
1677                         } else {
1678                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
1679                                         'deletedwhileediting' );
1680                         }
1681                 }
1682
1683                 $wgOut->addHTML( Html::openElement( 'form', array( 'id' => 'editform', 'name' => 'editform',
1684                         'method' => 'post', 'action' => $this->getActionURL( $this->getContextTitle() ),
1685                         'enctype' => 'multipart/form-data' ) ) );
1686
1687                 if ( is_callable( $formCallback ) ) {
1688                         call_user_func_array( $formCallback, array( &$wgOut ) );
1689                 }
1690
1691                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1692
1693                 // Put these up at the top to ensure they aren't lost on early form submission
1694                 $this->showFormBeforeText();
1695
1696                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
1697                         $username = $this->lastDelete->user_name;
1698                         $comment = $this->lastDelete->log_comment;
1699
1700                         // It is better to not parse the comment at all than to have templates expanded in the middle
1701                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
1702                         $key = $comment === ''
1703                                 ? 'confirmrecreate-noreason'
1704                                 : 'confirmrecreate';
1705                         $wgOut->addHTML(
1706                                 '<div class="mw-confirm-recreate">' .
1707                                 wfMsgExt( $key, 'parseinline', $username, "<nowiki>$comment</nowiki>" ) .
1708                                 Xml::checkLabel( wfMsg( 'recreate' ), 'wpRecreate', 'wpRecreate', false,
1709                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
1710                                 ) .
1711                                 '</div>'
1712                         );
1713                 }
1714
1715                 # If a blank edit summary was previously provided, and the appropriate
1716                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1717                 # user being bounced back more than once in the event that a summary
1718                 # is not required.
1719                 #####
1720                 # For a bit more sophisticated detection of blank summaries, hash the
1721                 # automatic one and pass that in the hidden field wpAutoSummary.
1722                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
1723                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
1724                 }
1725
1726                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1727                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
1728
1729                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
1730
1731                 if ( $this->section == 'new' ) {
1732                         $this->showSummaryInput( true, $this->summary );
1733                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
1734                 }
1735
1736                 $wgOut->addHTML( $this->editFormTextBeforeContent );
1737
1738                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
1739                         $wgOut->addHTML( EditPage::getEditToolbar() );
1740                 }
1741
1742                 if ( $this->isConflict ) {
1743                         // In an edit conflict bypass the overrideable content form method
1744                         // and fallback to the raw wpTextbox1 since editconflicts can't be
1745                         // resolved between page source edits and custom ui edits using the
1746                         // custom edit ui.
1747                         $this->textbox2 = $this->textbox1;
1748                         $this->textbox1 = $this->getCurrentText();
1749
1750                         $this->showTextbox1();
1751                 } else {
1752                         $this->showContentForm();
1753                 }
1754
1755                 $wgOut->addHTML( $this->editFormTextAfterContent );
1756
1757                 $wgOut->addWikiText( $this->getCopywarn() );
1758
1759                 $wgOut->addHTML( $this->editFormTextAfterWarn );
1760
1761                 $this->showStandardInputs();
1762
1763                 $this->showFormAfterText();
1764
1765                 $this->showTosSummary();
1766
1767                 $this->showEditTools();
1768
1769                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
1770
1771                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
1772                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
1773
1774                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
1775                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
1776
1777                 if ( $this->isConflict ) {
1778                         $this->showConflict();
1779                 }
1780
1781                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
1782
1783                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1784                         $this->displayPreviewArea( $previewOutput, false );
1785                 }
1786
1787                 wfProfileOut( __METHOD__ );
1788         }
1789
1790         /**
1791          * Extract the section title from current section text, if any.
1792          *
1793          * @param string $text
1794          * @return Mixed|string or false
1795          */
1796         public static function extractSectionTitle( $text ) {
1797                 preg_match( "/^(=+)(.+)\\1(\n|$)/i", $text, $matches );
1798                 if ( !empty( $matches[2] ) ) {
1799                         global $wgParser;
1800                         return $wgParser->stripSectionName(trim($matches[2]));
1801                 } else {
1802                         return false;
1803                 }
1804         }
1805
1806         protected function showHeader() {
1807                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
1808                 if ( $this->isConflict ) {
1809                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
1810                         $this->edittime = $this->mArticle->getTimestamp();
1811                 } else {
1812                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
1813                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
1814                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
1815                                 // Someone is welcome to try refactoring though
1816                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
1817                                 return false;
1818                         }
1819
1820                         if ( $this->section != '' && $this->section != 'new' ) {
1821                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
1822                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 );
1823                                         if ( $sectionTitle !== false ) {
1824                                                 $this->summary = "/* $sectionTitle */ ";
1825                                         }
1826                                 }
1827                         }
1828
1829                         if ( $this->missingComment ) {
1830                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
1831                         }
1832
1833                         if ( $this->missingSummary && $this->section != 'new' ) {
1834                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
1835                         }
1836
1837                         if ( $this->missingSummary && $this->section == 'new' ) {
1838                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
1839                         }
1840
1841                         if ( $this->hookError !== '' ) {
1842                                 $wgOut->addWikiText( $this->hookError );
1843                         }
1844
1845                         if ( !$this->checkUnicodeCompliantBrowser() ) {
1846                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
1847                         }
1848
1849                         if ( $this->section != 'new' ) {
1850                                 $revision = $this->mArticle->getRevisionFetched();
1851                                 if ( $revision ) {
1852                                         // Let sysop know that this will make private content public if saved
1853
1854                                         if ( !$revision->userCan( Revision::DELETED_TEXT ) ) {
1855                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
1856                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
1857                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
1858                                         }
1859
1860                                         if ( !$revision->isCurrent() ) {
1861                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
1862                                                 $wgOut->addWikiMsg( 'editingold' );
1863                                         }
1864                                 } elseif ( $this->mTitle->exists() ) {
1865                                         // Something went wrong
1866
1867                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
1868                                                 array( 'missing-article', $this->mTitle->getPrefixedText(),
1869                                                 wfMsgNoTrans( 'missingarticle-rev', $this->oldid ) ) );
1870                                 }
1871                         }
1872                 }
1873
1874                 if ( wfReadOnly() ) {
1875                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
1876                 } elseif ( $wgUser->isAnon() ) {
1877                         if ( $this->formtype != 'preview' ) {
1878                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
1879                         } else {
1880                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
1881                         }
1882                 } else {
1883                         if ( $this->isCssJsSubpage ) {
1884                                 # Check the skin exists
1885                                 if ( $this->isWrongCaseCssJsPage ) {
1886                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
1887                                 }
1888                                 if ( $this->formtype !== 'preview' ) {
1889                                         if ( $this->isCssSubpage )
1890                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
1891                                         if ( $this->isJsSubpage )
1892                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
1893                                 }
1894                         }
1895                 }
1896
1897                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
1898                         # Is the title semi-protected?
1899                         if ( $this->mTitle->isSemiProtected() ) {
1900                                 $noticeMsg = 'semiprotectedpagewarning';
1901                         } else {
1902                                 # Then it must be protected based on static groups (regular)
1903                                 $noticeMsg = 'protectedpagewarning';
1904                         }
1905                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
1906                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
1907                 }
1908                 if ( $this->mTitle->isCascadeProtected() ) {
1909                         # Is this page under cascading protection from some source pages?
1910                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1911                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
1912                         $cascadeSourcesCount = count( $cascadeSources );
1913                         if ( $cascadeSourcesCount > 0 ) {
1914                                 # Explain, and list the titles responsible
1915                                 foreach( $cascadeSources as $page ) {
1916                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1917                                 }
1918                         }
1919                         $notice .= '</div>';
1920                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
1921                 }
1922                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
1923                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
1924                                 array(  'lim' => 1,
1925                                         'showIfEmpty' => false,
1926                                         'msgKey' => array( 'titleprotectedwarning' ),
1927                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
1928                 }
1929
1930                 if ( $this->kblength === false ) {
1931                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1932                 }
1933
1934                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
1935                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
1936                                 array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
1937                 } else {
1938                         if( !wfMessage('longpage-hint')->isDisabled() ) {
1939                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
1940                                         array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
1941                                 );
1942                         }
1943                 }
1944         }
1945
1946         /**
1947          * Standard summary input and label (wgSummary), abstracted so EditPage
1948          * subclasses may reorganize the form.
1949          * Note that you do not need to worry about the label's for=, it will be
1950          * inferred by the id given to the input. You can remove them both by
1951          * passing array( 'id' => false ) to $userInputAttrs.
1952          *
1953          * @param $summary string The value of the summary input
1954          * @param $labelText string The html to place inside the label
1955          * @param $inputAttrs array of attrs to use on the input
1956          * @param $spanLabelAttrs array of attrs to use on the span inside the label
1957          *
1958          * @return array An array in the format array( $label, $input )
1959          */
1960         function getSummaryInput($summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null) {
1961                 //Note: the maxlength is overriden in JS to 250 and to make it use UTF-8 bytes, not characters.
1962                 $inputAttrs = ( is_array($inputAttrs) ? $inputAttrs : array() ) + array(
1963                         'id' => 'wpSummary',
1964                         'maxlength' => '200',
1965                         'tabindex' => '1',
1966                         'size' => 60,
1967                         'spellcheck' => 'true',
1968                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
1969
1970                 $spanLabelAttrs = ( is_array($spanLabelAttrs) ? $spanLabelAttrs : array() ) + array(
1971                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
1972                         'id' => "wpSummaryLabel"
1973                 );
1974
1975                 $label = null;
1976                 if ( $labelText ) {
1977                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
1978                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
1979                 }
1980
1981                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
1982
1983                 return array( $label, $input );
1984         }
1985
1986         /**
1987          * @param $isSubjectPreview Boolean: true if this is the section subject/title
1988          *                          up top, or false if this is the comment summary
1989          *                          down below the textarea
1990          * @param $summary String: The text of the summary to display
1991          * @return String
1992          */
1993         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
1994                 global $wgOut, $wgContLang;
1995                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
1996                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
1997                 if ( $isSubjectPreview ) {
1998                         if ( $this->nosummary ) {
1999                                 return;
2000                         }
2001                 } else {
2002                         if ( !$this->mShowSummaryField ) {
2003                                 return;
2004                         }
2005                 }
2006                 $summary = $wgContLang->recodeForEdit( $summary );
2007                 $labelText = wfMsgExt( $isSubjectPreview ? 'subject' : 'summary', 'parseinline' );
2008                 list($label, $input) = $this->getSummaryInput($summary, $labelText, array( 'class' => $summaryClass ), array());
2009                 $wgOut->addHTML("{$label} {$input}");
2010         }
2011
2012         /**
2013          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2014          *                          up top, or false if this is the comment summary
2015          *                          down below the textarea
2016          * @param $summary String: the text of the summary to display
2017          * @return String
2018          */
2019         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2020                 if ( !$summary || ( !$this->preview && !$this->diff ) )
2021                         return "";
2022
2023                 global $wgParser;
2024
2025                 if ( $isSubjectPreview )
2026                         $summary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $summary ) );
2027
2028                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2029
2030                 $summary = wfMsgExt( $message, 'parseinline' ) . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2031                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2032         }
2033
2034         protected function showFormBeforeText() {
2035                 global $wgOut;
2036                 $section = htmlspecialchars( $this->section );
2037                 $wgOut->addHTML( <<<HTML
2038 <input type='hidden' value="{$section}" name="wpSection" />
2039 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2040 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2041 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2042
2043 HTML
2044                 );
2045                 if ( !$this->checkUnicodeCompliantBrowser() )
2046                         $wgOut->addHTML(Html::hidden( 'safemode', '1' ));
2047         }
2048
2049         protected function showFormAfterText() {
2050                 global $wgOut, $wgUser;
2051                 /**
2052                  * To make it harder for someone to slip a user a page
2053                  * which submits an edit form to the wiki without their
2054                  * knowledge, a random token is associated with the login
2055                  * session. If it's not passed back with the submission,
2056                  * we won't save the page, or render user JavaScript and
2057                  * CSS previews.
2058                  *
2059                  * For anon editors, who may not have a session, we just
2060                  * include the constant suffix to prevent editing from
2061                  * broken text-mangling proxies.
2062                  */
2063                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2064         }
2065
2066         /**
2067          * Subpage overridable method for printing the form for page content editing
2068          * By default this simply outputs wpTextbox1
2069          * Subclasses can override this to provide a custom UI for editing;
2070          * be it a form, or simply wpTextbox1 with a modified content that will be
2071          * reverse modified when extracted from the post data.
2072          * Note that this is basically the inverse for importContentFormData
2073          */
2074         protected function showContentForm() {
2075                 $this->showTextbox1();
2076         }
2077
2078         /**
2079          * Method to output wpTextbox1
2080          * The $textoverride method can be used by subclasses overriding showContentForm
2081          * to pass back to this method.
2082          *
2083          * @param $customAttribs An array of html attributes to use in the textarea
2084          * @param $textoverride String: optional text to override $this->textarea1 with
2085          */
2086         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2087                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2088                         $attribs = array( 'style' => 'display:none;' );
2089                 } else {
2090                         $classes = array(); // Textarea CSS
2091                         if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2092                                 # Is the title semi-protected?
2093                                 if ( $this->mTitle->isSemiProtected() ) {
2094                                         $classes[] = 'mw-textarea-sprotected';
2095                                 } else {
2096                                         # Then it must be protected based on static groups (regular)
2097                                         $classes[] = 'mw-textarea-protected';
2098                                 }
2099                                 # Is the title cascade-protected?
2100                                 if ( $this->mTitle->isCascadeProtected() ) {
2101                                         $classes[] = 'mw-textarea-cprotected';
2102                                 }
2103                         }
2104
2105                         $attribs = array( 'tabindex' => 1 );
2106
2107                         if ( is_array( $customAttribs ) ) {
2108                                 $attribs += $customAttribs;
2109                         }
2110
2111                         if ( count( $classes ) ) {
2112                                 if ( isset( $attribs['class'] ) ) {
2113                                         $classes[] = $attribs['class'];
2114                                 }
2115                                 $attribs['class'] = implode( ' ', $classes );
2116                         }
2117                 }
2118
2119                 $this->showTextbox( $textoverride !== null ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
2120         }
2121
2122         protected function showTextbox2() {
2123                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2124         }
2125
2126         protected function showTextbox( $content, $name, $customAttribs = array() ) {
2127                 global $wgOut, $wgUser;
2128
2129                 $wikitext = $this->safeUnicodeOutput( $content );
2130                 if ( strval($wikitext) !== '' ) {
2131                         // Ensure there's a newline at the end, otherwise adding lines
2132                         // is awkward.
2133                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2134                         // mode will show an extra newline. A bit annoying.
2135                         $wikitext .= "\n";
2136                 }
2137
2138                 $attribs = $customAttribs + array(
2139                         'accesskey' => ',',
2140                         'id'   => $name,
2141                         'rows' => $wgUser->getIntOption( 'rows' ),
2142                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
2143                 );
2144
2145                 $pageLang = $this->mTitle->getPageLanguage();
2146                 $attribs['lang'] = $pageLang->getCode();
2147                 $attribs['dir'] = $pageLang->getDir();
2148
2149                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2150         }
2151
2152         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2153                 global $wgOut;
2154                 $classes = array();
2155                 if ( $isOnTop )
2156                         $classes[] = 'ontop';
2157
2158                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2159
2160                 if ( $this->formtype != 'preview' )
2161                         $attribs['style'] = 'display: none;';
2162
2163                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2164
2165                 if ( $this->formtype == 'preview' ) {
2166                         $this->showPreview( $previewOutput );
2167                 }
2168
2169                 $wgOut->addHTML( '</div>' );
2170
2171                 if ( $this->formtype == 'diff') {
2172                         $this->showDiff();
2173                 }
2174         }
2175
2176         /**
2177          * Append preview output to $wgOut.
2178          * Includes category rendering if this is a category page.
2179          *
2180          * @param $text String: the HTML to be output for the preview.
2181          */
2182         protected function showPreview( $text ) {
2183                 global $wgOut;
2184                 if ( $this->mTitle->getNamespace() == NS_CATEGORY) {
2185                         $this->mArticle->openShowCategory();
2186                 }
2187                 # This hook seems slightly odd here, but makes things more
2188                 # consistent for extensions.
2189                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
2190                 $wgOut->addHTML( $text );
2191                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2192                         $this->mArticle->closeShowCategory();
2193                 }
2194         }
2195
2196         /**
2197          * Get a diff between the current contents of the edit box and the
2198          * version of the page we're editing from.
2199          *
2200          * If this is a section edit, we'll replace the section as for final
2201          * save and then make a comparison.
2202          */
2203         function showDiff() {
2204                 global $wgUser, $wgContLang, $wgParser, $wgOut;
2205
2206                 $oldtext = $this->getOriginalContent();
2207                 $newtext = $this->mArticle->replaceSection(
2208                         $this->section, $this->textbox1, $this->summary, $this->edittime );
2209
2210                 wfRunHooks( 'EditPageGetDiffText', array( $this, &$newtext ) );
2211
2212                 $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
2213                 $newtext = $wgParser->preSaveTransform( $newtext, $this->mTitle, $wgUser, $popts );
2214
2215                 if ( $oldtext !== false  || $newtext != '' ) {
2216                         $oldtitle = wfMsgExt( 'currentrev', array( 'parseinline' ) );
2217                         $newtitle = wfMsgExt( 'yourtext', array( 'parseinline' ) );
2218
2219                         $de = new DifferenceEngine( $this->mArticle->getContext() );
2220                         $de->setText( $oldtext, $newtext );
2221                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2222                         $de->showDiffStyle();
2223                 } else {
2224                         $difftext = '';
2225                 }
2226
2227                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2228         }
2229
2230         /**
2231          * Give a chance for site and per-namespace customizations of
2232          * terms of service summary link that might exist separately
2233          * from the copyright notice.
2234          *
2235          * This will display between the save button and the edit tools,
2236          * so should remain short!
2237          */
2238         protected function showTosSummary() {
2239                 $msg = 'editpage-tos-summary';
2240                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
2241                 if( !wfMessage( $msg )->isDisabled() ) {
2242                         global $wgOut;
2243                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
2244                         $wgOut->addWikiMsg( $msg );
2245                         $wgOut->addHTML( '</div>' );
2246                 }
2247         }
2248
2249         protected function showEditTools() {
2250                 global $wgOut;
2251                 $wgOut->addHTML( '<div class="mw-editTools">' .
2252                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
2253                         '</div>' );
2254         }
2255
2256         protected function getCopywarn() {
2257                 global $wgRightsText;
2258                 if ( $wgRightsText ) {
2259                         $copywarnMsg = array( 'copyrightwarning',
2260                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
2261                                 $wgRightsText );
2262                 } else {
2263                         $copywarnMsg = array( 'copyrightwarning2',
2264                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
2265                 }
2266                 // Allow for site and per-namespace customization of contribution/copyright notice.
2267                 wfRunHooks( 'EditPageCopyrightWarning', array( $this->mTitle, &$copywarnMsg ) );
2268
2269                 return "<div id=\"editpage-copywarn\">\n" .
2270                         call_user_func_array("wfMsgNoTrans", $copywarnMsg) . "\n</div>";
2271         }
2272
2273         protected function showStandardInputs( &$tabindex = 2 ) {
2274                 global $wgOut;
2275                 $wgOut->addHTML( "<div class='editOptions'>\n" );
2276
2277                 if ( $this->section != 'new' ) {
2278                         $this->showSummaryInput( false, $this->summary );
2279                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
2280                 }
2281
2282                 $checkboxes = $this->getCheckboxes( $tabindex,
2283                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
2284                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
2285                 $wgOut->addHTML( "<div class='editButtons'>\n" );
2286                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
2287
2288                 $cancel = $this->getCancelLink();
2289                 if ( $cancel !== '' ) {
2290                         $cancel .= wfMsgExt( 'pipe-separator' , 'escapenoentities' );
2291                 }
2292                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ) );
2293                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
2294                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
2295                         htmlspecialchars( wfMsg( 'newwindow' ) );
2296                 $wgOut->addHTML( "      <span class='editHelp'>{$cancel}{$edithelp}</span>\n" );
2297                 $wgOut->addHTML( "</div><!-- editButtons -->\n</div><!-- editOptions -->\n" );
2298         }
2299
2300         /**
2301          * Show an edit conflict. textbox1 is already shown in showEditForm().
2302          * If you want to use another entry point to this function, be careful.
2303          */
2304         protected function showConflict() {
2305                 global $wgOut;
2306
2307                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
2308                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2309
2310                         $de = new DifferenceEngine( $this->mArticle->getContext() );
2311                         $de->setText( $this->textbox2, $this->textbox1 );
2312                         $de->showDiff( wfMsgExt( 'yourtext', 'parseinline' ), wfMsg( 'storedversion' ) );
2313
2314                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2315                         $this->showTextbox2();
2316                 }
2317         }
2318
2319         /**
2320          * @return string
2321          */
2322         public function getCancelLink() {
2323                 $cancelParams = array();
2324                 if ( !$this->isConflict && $this->oldid > 0 ) {
2325                         $cancelParams['oldid'] = $this->oldid;
2326                 }
2327
2328                 return Linker::linkKnown(
2329                         $this->getContextTitle(),
2330                         wfMsgExt( 'cancel', array( 'parseinline' ) ),
2331                         array( 'id' => 'mw-editform-cancel' ),
2332                         $cancelParams
2333                 );
2334         }
2335
2336         /**
2337          * Returns the URL to use in the form's action attribute.
2338          * This is used by EditPage subclasses when simply customizing the action
2339          * variable in the constructor is not enough. This can be used when the
2340          * EditPage lives inside of a Special page rather than a custom page action.
2341          *
2342          * @param $title Title object for which is being edited (where we go to for &action= links)
2343          * @return string
2344          */
2345         protected function getActionURL( Title $title ) {
2346                 return $title->getLocalURL( array( 'action' => $this->action ) );
2347         }
2348
2349         /**
2350          * Check if a page was deleted while the user was editing it, before submit.
2351          * Note that we rely on the logging table, which hasn't been always there,
2352          * but that doesn't matter, because this only applies to brand new
2353          * deletes.
2354          */
2355         protected function wasDeletedSinceLastEdit() {
2356                 if ( $this->deletedSinceEdit !== null ) {
2357                         return $this->deletedSinceEdit;
2358                 }
2359
2360                 $this->deletedSinceEdit = false;
2361
2362                 if ( $this->mTitle->isDeletedQuick() ) {
2363                         $this->lastDelete = $this->getLastDelete();
2364                         if ( $this->lastDelete ) {
2365                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
2366                                 if ( $deleteTime > $this->starttime ) {
2367                                         $this->deletedSinceEdit = true;
2368                                 }
2369                         }
2370                 }
2371
2372                 return $this->deletedSinceEdit;
2373         }
2374
2375         protected function getLastDelete() {
2376                 $dbr = wfGetDB( DB_SLAVE );
2377                 $data = $dbr->selectRow(
2378                         array( 'logging', 'user' ),
2379                         array( 'log_type',
2380                                    'log_action',
2381                                    'log_timestamp',
2382                                    'log_user',
2383                                    'log_namespace',
2384                                    'log_title',
2385                                    'log_comment',
2386                                    'log_params',
2387                                    'log_deleted',
2388                                    'user_name' ),
2389                         array( 'log_namespace' => $this->mTitle->getNamespace(),
2390                                    'log_title' => $this->mTitle->getDBkey(),
2391                                    'log_type' => 'delete',
2392                                    'log_action' => 'delete',
2393                                    'user_id=log_user' ),
2394                         __METHOD__,
2395                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
2396                 );
2397                 // Quick paranoid permission checks...
2398                 if( is_object( $data ) ) {
2399                         if( $data->log_deleted & LogPage::DELETED_USER )
2400                                 $data->user_name = wfMsgHtml( 'rev-deleted-user' );
2401                         if( $data->log_deleted & LogPage::DELETED_COMMENT )
2402                                 $data->log_comment = wfMsgHtml( 'rev-deleted-comment' );
2403                 }
2404                 return $data;
2405         }
2406
2407         /**
2408          * Get the rendered text for previewing.
2409          * @return string
2410          */
2411         function getPreviewText() {
2412                 global $wgOut, $wgUser, $wgParser, $wgRawHtml;
2413
2414                 wfProfileIn( __METHOD__ );
2415
2416                 if ( $wgRawHtml && !$this->mTokenOk ) {
2417                         // Could be an offsite preview attempt. This is very unsafe if
2418                         // HTML is enabled, as it could be an attack.
2419                         $parsedNote = '';
2420                         if ( $this->textbox1 !== '' ) {
2421                                 // Do not put big scary notice, if previewing the empty
2422                                 // string, which happens when you initially edit
2423                                 // a category page, due to automatic preview-on-open.
2424                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
2425                                         wfMsg( 'session_fail_preview_html' ) . "</div>", true, /* interface */true );
2426                         }
2427                         wfProfileOut( __METHOD__ );
2428                         return $parsedNote;
2429                 }
2430
2431                 if ( $this->mTriedSave && !$this->mTokenOk ) {
2432                         if ( $this->mTokenOkExceptSuffix ) {
2433                                 $note = wfMsg( 'token_suffix_mismatch' );
2434                         } else {
2435                                 $note = wfMsg( 'session_fail_preview' );
2436                         }
2437                 } elseif ( $this->incompleteForm ) {
2438                         $note = wfMsg( 'edit_form_incomplete' );
2439                 } else {
2440                         $note = wfMsg( 'previewnote' );
2441                 }
2442
2443                 $parserOptions = ParserOptions::newFromUser( $wgUser );
2444                 $parserOptions->setEditSection( false );
2445                 $parserOptions->setTidy( true );
2446                 $parserOptions->setIsPreview( true );
2447                 $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
2448
2449                 # don't parse non-wikitext pages, show message about preview
2450                 # 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?
2451
2452                 if ( $this->isCssJsSubpage || !$this->mTitle->isWikitextPage() ) {
2453                         if( $this->mTitle->isCssJsSubpage() ) {
2454                                 $level = 'user';
2455                         } elseif( $this->mTitle->isCssOrJsPage() ) {
2456                                 $level = 'site';
2457                         } else {
2458                                 $level = false;
2459                         }
2460
2461                         # Used messages to make sure grep find them:
2462                         # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
2463                         if( $level ) {
2464                                 if (preg_match( "/\\.css$/", $this->mTitle->getText() ) ) {
2465                                         $previewtext = "<div id='mw-{$level}csspreview'>\n" . wfMsg( "{$level}csspreview" ) . "\n</div>";
2466                                         $class = "mw-code mw-css";
2467                                 } elseif (preg_match( "/\\.js$/", $this->mTitle->getText() ) ) {
2468                                         $previewtext = "<div id='mw-{$level}jspreview'>\n" . wfMsg( "{$level}jspreview" ) . "\n</div>";
2469                                         $class = "mw-code mw-js";
2470                                 } else {
2471                                         throw new MWException( 'A CSS/JS (sub)page but which is not css nor js!' );
2472                                 }
2473                         }
2474
2475                         $parserOutput = $wgParser->parse( $previewtext, $this->mTitle, $parserOptions );
2476                         $previewHTML = $parserOutput->mText;
2477                         $previewHTML .= "<pre class=\"$class\" dir=\"ltr\">\n" . htmlspecialchars( $this->textbox1 ) . "\n</pre>\n";
2478                 } else {
2479                         $rt = Title::newFromRedirectArray( $this->textbox1 );
2480                         if ( $rt ) {
2481                                 $previewHTML = $this->mArticle->viewRedirect( $rt, false );
2482                         } else {
2483                                 $toparse = $this->textbox1;
2484
2485                                 # If we're adding a comment, we need to show the
2486                                 # summary as the headline
2487                                 if ( $this->section == "new" && $this->summary != "" ) {
2488                                         $toparse = wfMsgForContent( 'newsectionheaderdefaultlevel', $this->summary ) . "\n\n" . $toparse;
2489                                 }
2490
2491                                 wfRunHooks( 'EditPageGetPreviewText', array( $this, &$toparse ) );
2492
2493                                 $parserOptions->enableLimitReport();
2494
2495                                 $toparse = $wgParser->preSaveTransform( $toparse, $this->mTitle, $wgUser, $parserOptions );
2496                                 $parserOutput = $wgParser->parse( $toparse, $this->mTitle, $parserOptions );
2497
2498                                 $previewHTML = $parserOutput->getText();
2499                                 $this->mParserOutput = $parserOutput;
2500                                 $wgOut->addParserOutputNoText( $parserOutput );
2501
2502                                 if ( count( $parserOutput->getWarnings() ) ) {
2503                                         $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
2504                                 }
2505                         }
2506                 }
2507
2508                 if( $this->isConflict ) {
2509                         $conflict = '<h2 id="mw-previewconflict">' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
2510                 } else {
2511                         $conflict = '<hr />';
2512                 }
2513
2514                 $previewhead = "<div class='previewnote'>\n" .
2515                         '<h2 id="mw-previewheader">' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>" .
2516                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
2517
2518                 $pageLang = $this->mTitle->getPageLanguage();
2519                 $attribs = array( 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
2520                         'class' => 'mw-content-'.$pageLang->getDir() );
2521                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
2522
2523                 wfProfileOut( __METHOD__ );
2524                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
2525         }
2526
2527         /**
2528          * @return Array
2529          */
2530         function getTemplates() {
2531                 if ( $this->preview || $this->section != '' ) {
2532                         $templates = array();
2533                         if ( !isset( $this->mParserOutput ) ) {
2534                                 return $templates;
2535                         }
2536                         foreach( $this->mParserOutput->getTemplates() as $ns => $template) {
2537                                 foreach( array_keys( $template ) as $dbk ) {
2538                                         $templates[] = Title::makeTitle($ns, $dbk);
2539                                 }
2540                         }
2541                         return $templates;
2542                 } else {
2543                         return $this->mTitle->getTemplateLinksFrom();
2544                 }
2545         }
2546
2547         /**
2548          * Shows a bulletin board style toolbar for common editing functions.
2549          * It can be disabled in the user preferences.
2550          * The necessary JavaScript code can be found in skins/common/edit.js.
2551          *
2552          * @return string
2553          */
2554         static function getEditToolbar() {
2555                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
2556                 global $wgUseTeX, $wgEnableUploads, $wgForeignFileRepos;
2557
2558                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
2559
2560                 /**
2561                  * $toolarray is an array of arrays each of which includes the
2562                  * filename of the button image (without path), the opening
2563                  * tag, the closing tag, optionally a sample text that is
2564                  * inserted between the two when no selection is highlighted
2565                  * and.  The tip text is shown when the user moves the mouse
2566                  * over the button.
2567                  *
2568                  * Also here: accesskeys (key), which are not used yet until
2569                  * someone can figure out a way to make them work in
2570                  * IE. However, we should make sure these keys are not defined
2571                  * on the edit page.
2572                  */
2573                 $toolarray = array(
2574                         array(
2575                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
2576                                 'id'     => 'mw-editbutton-bold',
2577                                 'open'   => '\'\'\'',
2578                                 'close'  => '\'\'\'',
2579                                 'sample' => wfMsg( 'bold_sample' ),
2580                                 'tip'    => wfMsg( 'bold_tip' ),
2581                                 'key'    => 'B'
2582                         ),
2583                         array(
2584                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
2585                                 'id'     => 'mw-editbutton-italic',
2586                                 'open'   => '\'\'',
2587                                 'close'  => '\'\'',
2588                                 'sample' => wfMsg( 'italic_sample' ),
2589                                 'tip'    => wfMsg( 'italic_tip' ),
2590                                 'key'    => 'I'
2591                         ),
2592                         array(
2593                                 'image'  => $wgLang->getImageFile( 'button-link' ),
2594                                 'id'     => 'mw-editbutton-link',
2595                                 'open'   => '[[',
2596                                 'close'  => ']]',
2597                                 'sample' => wfMsg( 'link_sample' ),
2598                                 'tip'    => wfMsg( 'link_tip' ),
2599                                 'key'    => 'L'
2600                         ),
2601                         array(
2602                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
2603                                 'id'     => 'mw-editbutton-extlink',
2604                                 'open'   => '[',
2605                                 'close'  => ']',
2606                                 'sample' => wfMsg( 'extlink_sample' ),
2607                                 'tip'    => wfMsg( 'extlink_tip' ),
2608                                 'key'    => 'X'
2609                         ),
2610                         array(
2611                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
2612                                 'id'     => 'mw-editbutton-headline',
2613                                 'open'   => "\n== ",
2614                                 'close'  => " ==\n",
2615                                 'sample' => wfMsg( 'headline_sample' ),
2616                                 'tip'    => wfMsg( 'headline_tip' ),
2617                                 'key'    => 'H'
2618                         ),
2619                         $imagesAvailable ? array(
2620                                 'image'  => $wgLang->getImageFile( 'button-image' ),
2621                                 'id'     => 'mw-editbutton-image',
2622                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
2623                                 'close'  => ']]',
2624                                 'sample' => wfMsg( 'image_sample' ),
2625                                 'tip'    => wfMsg( 'image_tip' ),
2626                                 'key'    => 'D',
2627                         ) : false,
2628                         $imagesAvailable ? array(
2629                                 'image'  => $wgLang->getImageFile( 'button-media' ),
2630                                 'id'     => 'mw-editbutton-media',
2631                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
2632                                 'close'  => ']]',
2633                                 'sample' => wfMsg( 'media_sample' ),
2634                                 'tip'    => wfMsg( 'media_tip' ),
2635                                 'key'    => 'M'
2636                         ) : false,
2637                         $wgUseTeX ?     array(
2638                                 'image'  => $wgLang->getImageFile( 'button-math' ),
2639                                 'id'     => 'mw-editbutton-math',
2640                                 'open'   => "<math>",
2641                                 'close'  => "</math>",
2642                                 'sample' => wfMsg( 'math_sample' ),
2643                                 'tip'    => wfMsg( 'math_tip' ),
2644                                 'key'    => 'C'
2645                         ) : false,
2646                         array(
2647                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
2648                                 'id'     => 'mw-editbutton-nowiki',
2649                                 'open'   => "<nowiki>",
2650                                 'close'  => "</nowiki>",
2651                                 'sample' => wfMsg( 'nowiki_sample' ),
2652                                 'tip'    => wfMsg( 'nowiki_tip' ),
2653                                 'key'    => 'N'
2654                         ),
2655                         array(
2656                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
2657                                 'id'     => 'mw-editbutton-signature',
2658                                 'open'   => '--~~~~',
2659                                 'close'  => '',
2660                                 'sample' => '',
2661                                 'tip'    => wfMsg( 'sig_tip' ),
2662                                 'key'    => 'Y'
2663                         ),
2664                         array(
2665                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
2666                                 'id'     => 'mw-editbutton-hr',
2667                                 'open'   => "\n----\n",
2668                                 'close'  => '',
2669                                 'sample' => '',
2670                                 'tip'    => wfMsg( 'hr_tip' ),
2671                                 'key'    => 'R'
2672                         )
2673                 );
2674
2675                 $script = '';
2676                 foreach ( $toolarray as $tool ) {
2677                         if ( !$tool ) {
2678                                 continue;
2679                         }
2680
2681                         $params = array(
2682                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
2683                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
2684                                 // Older browsers show a "speedtip" type message only for ALT.
2685                                 // Ideally these should be different, realistically they
2686                                 // probably don't need to be.
2687                                 $tip = $tool['tip'],
2688                                 $open = $tool['open'],
2689                                 $close = $tool['close'],
2690                                 $sample = $tool['sample'],
2691                                 $cssId = $tool['id'],
2692                         );
2693
2694                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
2695                 }
2696                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
2697
2698                 $toolbar = '<div id="toolbar"></div>';
2699
2700                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
2701
2702                 return $toolbar;
2703         }
2704
2705         /**
2706          * Returns an array of html code of the following checkboxes:
2707          * minor and watch
2708          *
2709          * @param $tabindex Current tabindex
2710          * @param $checked Array of checkbox => bool, where bool indicates the checked
2711          *                 status of the checkbox
2712          *
2713          * @return array
2714          */
2715         public function getCheckboxes( &$tabindex, $checked ) {
2716                 global $wgUser;
2717
2718                 $checkboxes = array();
2719
2720                 // don't show the minor edit checkbox if it's a new page or section
2721                 if ( !$this->isNew ) {
2722                         $checkboxes['minor'] = '';
2723                         $minorLabel = wfMsgExt( 'minoredit', array( 'parseinline' ) );
2724                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
2725                                 $attribs = array(
2726                                         'tabindex'  => ++$tabindex,
2727                                         'accesskey' => wfMsg( 'accesskey-minoredit' ),
2728                                         'id'        => 'wpMinoredit',
2729                                 );
2730                                 $checkboxes['minor'] =
2731                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
2732                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
2733                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
2734                                         ">{$minorLabel}</label>";
2735                         }
2736                 }
2737
2738                 $watchLabel = wfMsgExt( 'watchthis', array( 'parseinline' ) );
2739                 $checkboxes['watch'] = '';
2740                 if ( $wgUser->isLoggedIn() ) {
2741                         $attribs = array(
2742                                 'tabindex'  => ++$tabindex,
2743                                 'accesskey' => wfMsg( 'accesskey-watch' ),
2744                                 'id'        => 'wpWatchthis',
2745                         );
2746                         $checkboxes['watch'] =
2747                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
2748                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
2749                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
2750                                 ">{$watchLabel}</label>";
2751                 }
2752                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
2753                 return $checkboxes;
2754         }
2755
2756         /**
2757          * Returns an array of html code of the following buttons:
2758          * save, diff, preview and live
2759          *
2760          * @param $tabindex Current tabindex
2761          *
2762          * @return array
2763          */
2764         public function getEditButtons( &$tabindex ) {
2765                 $buttons = array();
2766
2767                 $temp = array(
2768                         'id'        => 'wpSave',
2769                         'name'      => 'wpSave',
2770                         'type'      => 'submit',
2771                         'tabindex'  => ++$tabindex,
2772                         'value'     => wfMsg( 'savearticle' ),
2773                         'accesskey' => wfMsg( 'accesskey-save' ),
2774                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
2775                 );
2776                 $buttons['save'] = Xml::element('input', $temp, '');
2777
2778                 ++$tabindex; // use the same for preview and live preview
2779                 $temp = array(
2780                         'id'        => 'wpPreview',
2781                         'name'      => 'wpPreview',
2782                         'type'      => 'submit',
2783                         'tabindex'  => $tabindex,
2784                         'value'     => wfMsg( 'showpreview' ),
2785                         'accesskey' => wfMsg( 'accesskey-preview' ),
2786                         'title'     => wfMsg( 'tooltip-preview' ) . ' [' . wfMsg( 'accesskey-preview' ) . ']',
2787                 );
2788                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
2789                 $buttons['live'] = '';
2790
2791                 $temp = array(
2792                         'id'        => 'wpDiff',
2793                         'name'      => 'wpDiff',
2794                         'type'      => 'submit',
2795                         'tabindex'  => ++$tabindex,
2796                         'value'     => wfMsg( 'showdiff' ),
2797                         'accesskey' => wfMsg( 'accesskey-diff' ),
2798                         'title'     => wfMsg( 'tooltip-diff' ) . ' [' . wfMsg( 'accesskey-diff' ) . ']',
2799                 );
2800                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
2801
2802                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
2803                 return $buttons;
2804         }
2805
2806         /**
2807          * Output preview text only. This can be sucked into the edit page
2808          * via JavaScript, and saves the server time rendering the skin as
2809          * well as theoretically being more robust on the client (doesn't
2810          * disturb the edit box's undo history, won't eat your text on
2811          * failure, etc).
2812          *
2813          * @todo This doesn't include category or interlanguage links.
2814          *       Would need to enhance it a bit, <s>maybe wrap them in XML
2815          *       or something...</s> that might also require more skin
2816          *       initialization, so check whether that's a problem.
2817          */
2818         function livePreview() {
2819                 global $wgOut;
2820                 $wgOut->disable();
2821                 header( 'Content-type: text/xml; charset=utf-8' );
2822                 header( 'Cache-control: no-cache' );
2823
2824                 $previewText = $this->getPreviewText();
2825                 #$categories = $skin->getCategoryLinks();
2826
2827                 $s =
2828                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
2829                 Xml::tags( 'livepreview', null,
2830                         Xml::element( 'preview', null, $previewText )
2831                         #.      Xml::element( 'category', null, $categories )
2832                 );
2833                 echo $s;
2834         }
2835
2836         /**
2837          * Call the stock "user is blocked" page
2838          *
2839          * @deprecated in 1.19; throw an exception directly instead
2840          */
2841         function blockedPage() {
2842                 wfDeprecated( __METHOD__, '1.19' );
2843                 global $wgUser;
2844
2845                 throw new UserBlockedError( $wgUser->mBlock );
2846         }
2847
2848         /**
2849          * Produce the stock "please login to edit pages" page
2850          *
2851          * @deprecated in 1.19; throw an exception directly instead
2852          */
2853         function userNotLoggedInPage() {
2854                 wfDeprecated( __METHOD__, '1.19' );
2855                 throw new PermissionsError( 'edit' );
2856         }
2857
2858         /**
2859          * Show an error page saying to the user that he has insufficient permissions
2860          * to create a new page
2861          *
2862          * @deprecated in 1.19; throw an exception directly instead
2863          */
2864         function noCreatePermission() {
2865                 wfDeprecated( __METHOD__, '1.19' );
2866                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
2867                 throw new PermissionsError( $permission );
2868         }
2869
2870         /**
2871          * Creates a basic error page which informs the user that
2872          * they have attempted to edit a nonexistent section.
2873          */
2874         function noSuchSectionPage() {
2875                 global $wgOut;
2876
2877                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
2878
2879                 $res = wfMsgExt( 'nosuchsectiontext', 'parse', $this->section );
2880                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
2881                 $wgOut->addHTML( $res );
2882
2883                 $wgOut->returnToMain( false, $this->mTitle );
2884         }
2885
2886         /**
2887          * Produce the stock "your edit contains spam" page
2888          *
2889          * @param $match Text which triggered one or more filters
2890          * @deprecated since 1.17 Use method spamPageWithContent() instead
2891          */
2892         static function spamPage( $match = false ) {
2893                 wfDeprecated( __METHOD__, '1.17' );
2894
2895                 global $wgOut, $wgTitle;
2896
2897                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
2898
2899                 $wgOut->addHTML( '<div id="spamprotected">' );
2900                 $wgOut->addWikiMsg( 'spamprotectiontext' );
2901                 if ( $match ) {
2902                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
2903                 }
2904                 $wgOut->addHTML( '</div>' );
2905
2906                 $wgOut->returnToMain( false, $wgTitle );
2907         }
2908
2909         /**
2910          * Show "your edit contains spam" page with your diff and text
2911          *
2912          * @param $match Text which triggered one or more filters
2913          */
2914         public function spamPageWithContent( $match = false ) {
2915                 global $wgOut;
2916                 $this->textbox2 = $this->textbox1;
2917
2918                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
2919
2920                 $wgOut->addHTML( '<div id="spamprotected">' );
2921                 $wgOut->addWikiMsg( 'spamprotectiontext' );
2922                 if ( $match ) {
2923                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
2924                 }
2925                 $wgOut->addHTML( '</div>' );
2926
2927                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2928                 $de = new DifferenceEngine( $this->mArticle->getContext() );
2929                 $de->setText( $this->getCurrentText(), $this->textbox2 );
2930                 $de->showDiff( wfMsg( "storedversion" ), wfMsgExt( 'yourtext', 'parseinline' ) );
2931
2932                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2933                 $this->showTextbox2();
2934
2935                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
2936         }
2937
2938         /**
2939          * Format an anchor fragment as it would appear for a given section name
2940          * @param $text String
2941          * @return String
2942          * @private
2943          */
2944         function sectionAnchor( $text ) {
2945                 global $wgParser;
2946                 return $wgParser->guessSectionNameFromWikiText( $text );
2947         }
2948
2949         /**
2950          * Check if the browser is on a blacklist of user-agents known to
2951          * mangle UTF-8 data on form submission. Returns true if Unicode
2952          * should make it through, false if it's known to be a problem.
2953          * @return bool
2954          * @private
2955          */
2956         function checkUnicodeCompliantBrowser() {
2957                 global $wgBrowserBlackList;
2958                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
2959                         // No User-Agent header sent? Trust it by default...
2960                         return true;
2961                 }
2962                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
2963                 foreach ( $wgBrowserBlackList as $browser ) {
2964                         if ( preg_match($browser, $currentbrowser) ) {
2965                                 return false;
2966                         }
2967                 }
2968                 return true;
2969         }
2970
2971         /**
2972          * Filter an input field through a Unicode de-armoring process if it
2973          * came from an old browser with known broken Unicode editing issues.
2974          *
2975          * @param $request WebRequest
2976          * @param $field String
2977          * @return String
2978          * @private
2979          */
2980         function safeUnicodeInput( $request, $field ) {
2981                 $text = rtrim( $request->getText( $field ) );
2982                 return $request->getBool( 'safemode' )
2983                         ? $this->unmakesafe( $text )
2984                         : $text;
2985         }
2986
2987         /**
2988          * @param $request WebRequest
2989          * @param $text string
2990          * @return string
2991          */
2992         function safeUnicodeText( $request, $text ) {
2993                 $text = rtrim( $text );
2994                 return $request->getBool( 'safemode' )
2995                         ? $this->unmakesafe( $text )
2996                         : $text;
2997         }
2998
2999         /**
3000          * Filter an output field through a Unicode armoring process if it is
3001          * going to an old browser with known broken Unicode editing issues.
3002          *
3003          * @param $text String
3004          * @return String
3005          * @private
3006          */
3007         function safeUnicodeOutput( $text ) {
3008                 global $wgContLang;
3009                 $codedText = $wgContLang->recodeForEdit( $text );
3010                 return $this->checkUnicodeCompliantBrowser()
3011                         ? $codedText
3012                         : $this->makesafe( $codedText );
3013         }
3014
3015         /**
3016          * A number of web browsers are known to corrupt non-ASCII characters
3017          * in a UTF-8 text editing environment. To protect against this,
3018          * detected browsers will be served an armored version of the text,
3019          * with non-ASCII chars converted to numeric HTML character references.
3020          *
3021          * Preexisting such character references will have a 0 added to them
3022          * to ensure that round-trips do not alter the original data.
3023          *
3024          * @param $invalue String
3025          * @return String
3026          * @private
3027          */
3028         function makesafe( $invalue ) {
3029                 // Armor existing references for reversability.
3030                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
3031
3032                 $bytesleft = 0;
3033                 $result = "";
3034                 $working = 0;
3035                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
3036                         $bytevalue = ord( $invalue[$i] );
3037                         if ( $bytevalue <= 0x7F ) { //0xxx xxxx
3038                                 $result .= chr( $bytevalue );
3039                                 $bytesleft = 0;
3040                         } elseif ( $bytevalue <= 0xBF ) { //10xx xxxx
3041                                 $working = $working << 6;
3042                                 $working += ($bytevalue & 0x3F);
3043                                 $bytesleft--;
3044                                 if ( $bytesleft <= 0 ) {
3045                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3046                                 }
3047                         } elseif ( $bytevalue <= 0xDF ) { //110x xxxx
3048                                 $working = $bytevalue & 0x1F;
3049                                 $bytesleft = 1;
3050                         } elseif ( $bytevalue <= 0xEF ) { //1110 xxxx
3051                                 $working = $bytevalue & 0x0F;
3052                                 $bytesleft = 2;
3053                         } else { //1111 0xxx
3054                                 $working = $bytevalue & 0x07;
3055                                 $bytesleft = 3;
3056                         }
3057                 }
3058                 return $result;
3059         }
3060
3061         /**
3062          * Reverse the previously applied transliteration of non-ASCII characters
3063          * back to UTF-8. Used to protect data from corruption by broken web browsers
3064          * as listed in $wgBrowserBlackList.
3065          *
3066          * @param $invalue String
3067          * @return String
3068          * @private
3069          */
3070         function unmakesafe( $invalue ) {
3071                 $result = "";
3072                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
3073                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i+3] != '0' ) ) {
3074                                 $i += 3;
3075                                 $hexstring = "";
3076                                 do {
3077                                         $hexstring .= $invalue[$i];
3078                                         $i++;
3079                                 } while( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
3080
3081                                 // Do some sanity checks. These aren't needed for reversability,
3082                                 // but should help keep the breakage down if the editor
3083                                 // breaks one of the entities whilst editing.
3084                                 if ( (substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6) ) {
3085                                         $codepoint = hexdec($hexstring);
3086                                         $result .= codepointToUtf8( $codepoint );
3087                                 } else {
3088                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
3089                                 }
3090                         } else {
3091                                 $result .= substr( $invalue, $i, 1 );
3092                         }
3093                 }
3094                 // reverse the transform that we made for reversability reasons.
3095                 return strtr( $result, array( "&#x0" => "&#x" ) );
3096         }
3097 }