includes/EditPage.php

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