includes/EditPage.php

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