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