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  * $wgTitle is the page that forms submit to, links point to,
  15  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  16  * page in the database that is actually being edited. These are
  17  * usually the same, but they are now allowed to be different.
  18  */
  19 class EditPage {
  20         const AS_SUCCESS_UPDATE            = 200;
  21         const AS_SUCCESS_NEW_ARTICLE       = 201;
  22         const AS_HOOK_ERROR                = 210;
  23         const AS_FILTERING                 = 211;
  24         const AS_HOOK_ERROR_EXPECTED       = 212;
  25         const AS_BLOCKED_PAGE_FOR_USER     = 215;
  26         const AS_CONTENT_TOO_BIG           = 216;
  27         const AS_USER_CANNOT_EDIT          = 217;
  28         const AS_READ_ONLY_PAGE_ANON       = 218;
  29         const AS_READ_ONLY_PAGE_LOGGED     = 219;
  30         const AS_READ_ONLY_PAGE            = 220;
  31         const AS_RATE_LIMITED              = 221;
  32         const AS_ARTICLE_WAS_DELETED       = 222;
  33         const AS_NO_CREATE_PERMISSION      = 223;
  34         const AS_BLANK_ARTICLE             = 224;
  35         const AS_CONFLICT_DETECTED         = 225;
  36         const AS_SUMMARY_NEEDED            = 226;
  37         const AS_TEXTBOX_EMPTY             = 228;
  38         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
  39         const AS_OK                        = 230;
  40         const AS_END                       = 231;
  41         const AS_SPAM_ERROR                = 232;
  42         const AS_IMAGE_REDIRECT_ANON       = 233;
  43         const AS_IMAGE_REDIRECT_LOGGED     = 234;
  44
  45         var $mArticle;
  46         var $mTitle;
  47         var $action;
  48         var $isConflict = false;
  49         var $isCssJsSubpage = false;
  50         var $isCssSubpage = false;
  51         var $isJsSubpage = false;
  52         var $deletedSinceEdit;
  53         var $formtype;
  54         var $firsttime;
  55         var $lastDelete;
  56         var $mTokenOk = false;
  57         var $mTokenOkExceptSuffix = false;
  58         var $mTriedSave = false;
  59         var $tooBig = false;
  60         var $kblength = false;
  61         var $missingComment = false;
  62         var $missingSummary = false;
  63         var $allowBlankSummary = false;
  64         var $autoSumm = '';
  65         var $hookError = '';
  66         #var $mPreviewTemplates;
  67         var $mParserOutput;
  68         var $mBaseRevision = false;
  69         var $mShowSummaryField = true;
  70
  71         # Form values
  72         var $save = false, $preview = false, $diff = false;
  73         var $minoredit = false, $watchthis = false, $recreate = false;
  74         var $textbox1 = '', $textbox2 = '', $summary = '', $nosummary = false;
  75         var $edittime = '', $section = '', $starttime = '';
  76         var $oldid = 0, $editintro = '', $scrolltop = null, $bot = true;
  77
  78         # Placeholders for text injection by hooks (must be HTML)
  79         # extensions should take care to _append_ to the present value
  80         public $editFormPageTop; // Before even the preview
  81         public $editFormTextTop;
  82         public $editFormTextBeforeContent;
  83         public $editFormTextAfterWarn;
  84         public $editFormTextAfterTools;
  85         public $editFormTextBottom;
  86         public $editFormTextAfterContent;
  87         public $previewTextAfterContent;
  88
  89         /* $didSave should be set to true whenever an article was succesfully altered. */
  90         public $didSave = false;
  91         public $undidRev = 0;
  92
  93         public $suppressIntro = false;
  94
  95         /**
  96          * @todo document
  97          * @param $article
  98          */
  99         function __construct( $article ) {
 100                 $this->mArticle =& $article;
 101                 $this->mTitle = $article->getTitle();
 102                 $this->action = 'submit';
 103
 104                 # Placeholders for text injection by hooks (empty per default)
 105                 $this->editFormPageTop =
 106                 $this->editFormTextTop =
 107                 $this->editFormTextBeforeContent =
 108                 $this->editFormTextAfterWarn =
 109                 $this->editFormTextAfterTools =
 110                 $this->editFormTextBottom =
 111                 $this->editFormTextAfterContent =
 112                 $this->previewTextAfterContent =
 113                 $this->mPreloadText = "";
 114         }
 115
 116         function getArticle() {
 117                 return $this->mArticle;
 118         }
 119
 120
 121         /**
 122          * Fetch initial editing page content.
 123          * @returns mixed string on success, $def_text for invalid sections
 124          * @private
 125          */
 126         function getContent( $def_text = '' ) {
 127                 global $wgOut, $wgRequest, $wgParser, $wgContLang, $wgMessageCache;
 128
 129                 wfProfileIn( __METHOD__ );
 130                 # Get variables from query string :P
 131                 $section = $wgRequest->getVal( 'section' );
 132
 133                 $preload = $wgRequest->getVal( 'preload',
 134                         // Custom preload text for new sections
 135                         $section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 136                 $undoafter = $wgRequest->getVal( 'undoafter' );
 137                 $undo = $wgRequest->getVal( 'undo' );
 138
 139                 // For message page not locally set, use the i18n message.
 140                 // For other non-existent articles, use preload text if any.
 141                 if ( !$this->mTitle->exists() ) {
 142                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 143                                 # If this is a system message, get the default text.
 144                                 list( $message, $lang ) = $wgMessageCache->figureMessage( $wgContLang->lcfirst( $this->mTitle->getText() ) );
 145                                 $text = wfMsgGetKey( $message, false, $lang, false );
 146                                 if( wfEmptyMsg( $message, $text ) )
 147                                         $text = $this->getPreloadedText( $preload );
 148                         } else {
 149                                 # If requested, preload some text.
 150                                 $text = $this->getPreloadedText( $preload );
 151                         }
 152                 // For existing pages, get text based on "undo" or section parameters.
 153                 } else {
 154                         $text = $this->mArticle->getContent();
 155                         if ( $undo > 0 && $undoafter > 0 && $undo < $undoafter ) {
 156                                 # If they got undoafter and undo round the wrong way, switch them
 157                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 158                         }
 159                         if ( $undo > 0 && $undo > $undoafter ) {
 160                                 # Undoing a specific edit overrides section editing; section-editing
 161                                 # doesn't work with undoing.
 162                                 if ( $undoafter ) {
 163                                         $undorev = Revision::newFromId( $undo );
 164                                         $oldrev = Revision::newFromId( $undoafter );
 165                                 } else {
 166                                         $undorev = Revision::newFromId( $undo );
 167                                         $oldrev = $undorev ? $undorev->getPrevious() : null;
 168                                 }
 169
 170                                 # Sanity check, make sure it's the right page,
 171                                 # the revisions exist and they were not deleted.
 172                                 # Otherwise, $text will be left as-is.
 173                                 if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 174                                         $undorev->getPage() == $oldrev->getPage() &&
 175                                         $undorev->getPage() == $this->mArticle->getID() &&
 176                                         !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 177                                         !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 178
 179                                         $undotext = $this->mArticle->getUndoText( $undorev, $oldrev );
 180                                         if ( $undotext === false ) {
 181                                                 # Warn the user that something went wrong
 182                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-failure">' . wfMsgNoTrans( 'undo-failure' ) . '</div>' );
 183                                         } else {
 184                                                 $text = $undotext;
 185                                                 # Inform the user of our success and set an automatic edit summary
 186                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="mw-undo-success">' . wfMsgNoTrans( 'undo-success' ) . '</div>' );
 187                                                 $firstrev = $oldrev->getNext();
 188                                                 # If we just undid one rev, use an autosummary
 189                                                 if ( $firstrev->mId == $undo ) {
 190                                                         $this->summary = wfMsgForContent( 'undo-summary', $undo, $undorev->getUserText() );
 191                                                         $this->undidRev = $undo;
 192                                                 }
 193                                                 $this->formtype = 'diff';
 194                                         }
 195                                 } else {
 196                                         // Failed basic sanity checks.
 197                                         // Older revisions may have been removed since the link
 198                                         // was created, or we may simply have got bogus input.
 199                                         $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-norev">' . wfMsgNoTrans( 'undo-norev' ) . '</div>' );
 200                                 }
 201                         } else if ( $section != '' ) {
 202                                 if ( $section == 'new' ) {
 203                                         $text = $this->getPreloadedText( $preload );
 204                                 } else {
 205                                         // Get section edit text (returns $def_text for invalid sections)
 206                                         $text = $wgParser->getSection( $text, $section, $def_text );
 207                                 }
 208                         }
 209                 }
 210
 211                 wfProfileOut( __METHOD__ );
 212                 return $text;
 213         }
 214
 215         /** Use this method before edit() to preload some text into the edit box */
 216         public function setPreloadedText( $text ) {
 217                 $this->mPreloadText = $text;
 218         }
 219
 220         /**
 221          * Get the contents to be preloaded into the box, either set by
 222          * an earlier setPreloadText() or by loading the given page.
 223          *
 224          * @param $preload String: representing the title to preload from.
 225          * @return String
 226          */
 227         protected function getPreloadedText( $preload ) {
 228                 global $wgUser, $wgParser;
 229                 if ( !empty( $this->mPreloadText ) ) {
 230                         return $this->mPreloadText;
 231                 } elseif ( $preload !== '' ) {
 232                         $title = Title::newFromText( $preload );
 233                         # Check for existence to avoid getting MediaWiki:Noarticletext
 234                         if ( isset( $title ) && $title->exists() && $title->userCanRead() ) {
 235                                 $article = new Article( $title );
 236
 237                                 if ( $article->isRedirect() ) {
 238                                         $title = Title::newFromRedirectRecurse( $article->getContent() );
 239                                         # Redirects to missing titles are displayed, to hidden pages are followed
 240                                         # Copying observed behaviour from ?action=view
 241                                         if ( $title->exists() ) {
 242                                                 if ($title->userCanRead() ) {
 243                                                         $article = new Article( $title );
 244                                                 } else {
 245                                                         return "";
 246                                                 }
 247                                         }
 248                                 }
 249                                 $parserOptions = ParserOptions::newFromUser( $wgUser );
 250                                 return $wgParser->getPreloadText( $article->getContent(), $title, $parserOptions );
 251                         }
 252                 }
 253                 return '';
 254         }
 255
 256         /*
 257          * Check if a page was deleted while the user was editing it, before submit.
 258          * Note that we rely on the logging table, which hasn't been always there,
 259          * but that doesn't matter, because this only applies to brand new
 260          * deletes.
 261          */
 262         protected function wasDeletedSinceLastEdit() {
 263                 if ( $this->deletedSinceEdit !== null ) {
 264                         return $this->deletedSinceEdit;
 265                 }
 266
 267                 $this->deletedSinceEdit = false;
 268
 269                 if ( $this->mTitle->isDeletedQuick() ) {
 270                         $this->lastDelete = $this->getLastDelete();
 271                         if ( $this->lastDelete ) {
 272                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
 273                                 if ( $deleteTime > $this->starttime ) {
 274                                         $this->deletedSinceEdit = true;
 275                                 }
 276                         }
 277                 }
 278
 279                 return $this->deletedSinceEdit;
 280         }
 281
 282         /**
 283          * Checks whether the user entered a skin name in uppercase,
 284          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 285          */
 286         protected function isWrongCaseCssJsPage() {
 287                 if( $this->mTitle->isCssJsSubpage() ) {
 288                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 289                         $skins = array_merge(
 290                                 array_keys( Skin::getSkinNames() ),
 291                                 array( 'common' )
 292                         );
 293                         return !in_array( $name, $skins )
 294                                 && in_array( strtolower( $name ), $skins );
 295                 } else {
 296                         return false;
 297                 }
 298         }
 299
 300         function submit() {
 301                 $this->edit();
 302         }
 303
 304         /**
 305          * This is the function that gets called for "action=edit". It
 306          * sets up various member variables, then passes execution to
 307          * another function, usually showEditForm()
 308          *
 309          * The edit form is self-submitting, so that when things like
 310          * preview and edit conflicts occur, we get the same form back
 311          * with the extra stuff added.  Only when the final submission
 312          * is made and all is well do we actually save and redirect to
 313          * the newly-edited page.
 314          */
 315         function edit() {
 316                 global $wgOut, $wgRequest, $wgUser;
 317                 // Allow extensions to modify/prevent this form or submission
 318                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 319                         return;
 320                 }
 321
 322                 wfProfileIn( __METHOD__ );
 323                 wfDebug( __METHOD__.": enter\n" );
 324
 325                 // This is not an article
 326                 $wgOut->setArticleFlag( false );
 327
 328                 $this->importFormData( $wgRequest );
 329                 $this->firsttime = false;
 330
 331                 if ( $this->live ) {
 332                         $this->livePreview();
 333                         wfProfileOut( __METHOD__ );
 334                         return;
 335                 }
 336
 337                 if ( wfReadOnly() && $this->save ) {
 338                         // Force preview
 339                         $this->save = false;
 340                         $this->preview = true;
 341                 }
 342
 343                 $wgOut->addModules( array( 'mediawiki.legacy.edit', 'mediawiki.action.edit' ) );
 344
 345                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
 346                         $wgOut->addModules( 'mediawiki.legacy.preview' );
 347                 }
 348
 349                 $permErrors = $this->getEditPermissionErrors();
 350                 if ( $permErrors ) {
 351                         wfDebug( __METHOD__ . ": User can't edit\n" );
 352                         $content = $this->getContent( null );
 353                         $content = $content === '' ? null : $content;
 354                         $this->readOnlyPage( $content, true, $permErrors, 'edit' );
 355                         wfProfileOut( __METHOD__ );
 356                         return;
 357                 } else {
 358                         if ( $this->save ) {
 359                                 $this->formtype = 'save';
 360                         } else if ( $this->preview ) {
 361                                 $this->formtype = 'preview';
 362                         } else if ( $this->diff ) {
 363                                 $this->formtype = 'diff';
 364                         } else { # First time through
 365                                 $this->firsttime = true;
 366                                 if ( $this->previewOnOpen() ) {
 367                                         $this->formtype = 'preview';
 368                                 } else {
 369                                         $this->formtype = 'initial';
 370                                 }
 371                         }
 372                 }
 373
 374                 // If they used redlink=1 and the page exists, redirect to the main article
 375                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 376                         $wgOut->redirect( $this->mTitle->getFullURL() );
 377                 }
 378
 379                 wfProfileIn( __METHOD__."-business-end" );
 380
 381                 $this->isConflict = false;
 382                 // css / js subpages of user pages get a special treatment
 383                 $this->isCssJsSubpage      = $this->mTitle->isCssJsSubpage();
 384                 $this->isCssSubpage        = $this->mTitle->isCssSubpage();
 385                 $this->isJsSubpage         = $this->mTitle->isJsSubpage();
 386                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 387
 388                 # Show applicable editing introductions
 389                 if ( $this->formtype == 'initial' || $this->firsttime )
 390                         $this->showIntro();
 391
 392                 if ( $this->mTitle->isTalkPage() ) {
 393                         $wgOut->addWikiMsg( 'talkpagetext' );
 394                 }
 395
 396                 # Optional notices on a per-namespace and per-page basis
 397                 $editnotice_ns   = 'editnotice-'.$this->mTitle->getNamespace();
 398                 $editnotice_ns_message = wfMessage( $editnotice_ns )->inContentLanguage();
 399                 if ( $editnotice_ns_message->exists() ) {
 400                         $wgOut->addWikiText( $editnotice_ns_message->plain() );
 401                 }
 402                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
 403                         $parts = explode( '/', $this->mTitle->getDBkey() );
 404                         $editnotice_base = $editnotice_ns;
 405                         while ( count( $parts ) > 0 ) {
 406                                 $editnotice_base .= '-'.array_shift( $parts );
 407                                 $editnotice_base_msg = wfMessage( $editnotice_base )->inContentLanguage();
 408                                 if ( $editnotice_base_msg->exists() ) {
 409                                         $wgOut->addWikiText( $editnotice_base_msg->plain()  );
 410                                 }
 411                         }
 412                 }
 413
 414                 # Attempt submission here.  This will check for edit conflicts,
 415                 # and redundantly check for locked database, blocked IPs, etc.
 416                 # that edit() already checked just in case someone tries to sneak
 417                 # in the back door with a hand-edited submission URL.
 418
 419                 if ( 'save' == $this->formtype ) {
 420                         if ( !$this->attemptSave() ) {
 421                                 wfProfileOut( __METHOD__."-business-end" );
 422                                 wfProfileOut( __METHOD__ );
 423                                 return;
 424                         }
 425                 }
 426
 427                 # First time through: get contents, set time for conflict
 428                 # checking, etc.
 429                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 430                         if ( $this->initialiseForm() === false ) {
 431                                 $this->noSuchSectionPage();
 432                                 wfProfileOut( __METHOD__."-business-end" );
 433                                 wfProfileOut( __METHOD__ );
 434                                 return;
 435                         }
 436                         if ( !$this->mTitle->getArticleId() )
 437                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 438                         else
 439                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 440                 }
 441
 442                 $this->showEditForm();
 443                 wfProfileOut( __METHOD__."-business-end" );
 444                 wfProfileOut( __METHOD__ );
 445         }
 446
 447         protected function getEditPermissionErrors() {
 448                 global $wgUser;
 449                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 450                 # Can this title be created?
 451                 if ( !$this->mTitle->exists() ) {
 452                         $permErrors = array_merge( $permErrors,
 453                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 454                 }
 455                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 456                 $remove = array();
 457                 foreach( $permErrors as $error ) {
 458                         if ( ( $this->preview || $this->diff ) &&
 459                                 ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' ) )
 460                         {
 461                                 $remove[] = $error;
 462                         }
 463                 }
 464                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 465                 return $permErrors;
 466         }
 467
 468         /**
 469          * Show a read-only error
 470          * Parameters are the same as OutputPage:readOnlyPage()
 471          * Redirect to the article page if redlink=1
 472          */
 473         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 474                 global $wgRequest, $wgOut;
 475                 if ( $wgRequest->getBool( 'redlink' ) ) {
 476                         // The edit page was reached via a red link.
 477                         // Redirect to the article page and let them click the edit tab if
 478                         // they really want a permission error.
 479                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 480                 } else {
 481                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 482                 }
 483         }
 484
 485         /**
 486          * Should we show a preview when the edit form is first shown?
 487          *
 488          * @return bool
 489          */
 490         protected function previewOnOpen() {
 491                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 492                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 493                         // Explicit override from request
 494                         return true;
 495                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 496                         // Explicit override from request
 497                         return false;
 498                 } elseif ( $this->section == 'new' ) {
 499                         // Nothing *to* preview for new sections
 500                         return false;
 501                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 502                         // Standard preference behaviour
 503                         return true;
 504                 } elseif ( !$this->mTitle->exists() &&
 505                   isset($wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]) &&
 506                   $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 507                 {
 508                         // Categories are special
 509                         return true;
 510                 } else {
 511                         return false;
 512                 }
 513         }
 514
 515         /**
 516          * Does this EditPage class support section editing?
 517          * This is used by EditPage subclasses to indicate their ui cannot handle section edits
 518          *
 519          * @return bool
 520          */
 521         protected function isSectionEditSupported() {
 522                 return true;
 523         }
 524
 525         /**
 526          * Returns the URL to use in the form's action attribute.
 527          * This is used by EditPage subclasses when simply customizing the action
 528          * variable in the constructor is not enough. This can be used when the
 529          * EditPage lives inside of a Special page rather than a custom page action.
 530          *
 531          * @param $title Title object for which is being edited (where we go to for &action= links)
 532          * @return string
 533          */
 534         protected function getActionURL( Title $title ) {
 535                 return $title->getLocalURL( array( 'action' => $this->action ) );
 536         }
 537
 538         /**
 539          * @todo document
 540          * @param $request
 541          */
 542         function importFormData( &$request ) {
 543                 global $wgLang, $wgUser;
 544
 545                 wfProfileIn( __METHOD__ );
 546
 547                 # Section edit can come from either the form or a link
 548                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 549
 550                 if ( $request->wasPosted() ) {
 551                         # These fields need to be checked for encoding.
 552                         # Also remove trailing whitespace, but don't remove _initial_
 553                         # whitespace from the text boxes. This may be significant formatting.
 554                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 555                         if ( !$request->getCheck('wpTextbox2') ) {
 556                                 // Skip this if wpTextbox2 has input, it indicates that we came
 557                                 // from a conflict page with raw page text, not a custom form
 558                                 // modified by subclasses
 559                                 wfProfileIn( get_class($this)."::importContentFormData" );
 560                                 $textbox1 = $this->importContentFormData( $request );
 561                                 if ( isset($textbox1) )
 562                                         $this->textbox1 = $textbox1;
 563                                 wfProfileOut( get_class($this)."::importContentFormData" );
 564                         }
 565
 566                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 567                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary' ), 250 );
 568
 569                         # Remove extra headings from summaries and new sections.
 570                         $this->summary = preg_replace('/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary);
 571
 572                         $this->edittime = $request->getVal( 'wpEdittime' );
 573                         $this->starttime = $request->getVal( 'wpStarttime' );
 574
 575                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 576
 577                         if ( is_null( $this->edittime ) ) {
 578                                 # If the form is incomplete, force to preview.
 579                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 580                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 581                                 $this->preview = true;
 582                         } else {
 583                                 /* Fallback for live preview */
 584                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 585                                 $this->diff = $request->getCheck( 'wpDiff' );
 586
 587                                 // Remember whether a save was requested, so we can indicate
 588                                 // if we forced preview due to session failure.
 589                                 $this->mTriedSave = !$this->preview;
 590
 591                                 if ( $this->tokenOk( $request ) ) {
 592                                         # Some browsers will not report any submit button
 593                                         # if the user hits enter in the comment box.
 594                                         # The unmarked state will be assumed to be a save,
 595                                         # if the form seems otherwise complete.
 596                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 597                                 } else if ( $this->diff ) {
 598                                         # Failed token check, but only requested "Show Changes".
 599                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 600                                 } else {
 601                                         # Page might be a hack attempt posted from
 602                                         # an external site. Preview instead of saving.
 603                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 604                                         $this->preview = true;
 605                                 }
 606                         }
 607                         $this->save = !$this->preview && !$this->diff;
 608                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 609                                 $this->edittime = null;
 610                         }
 611
 612                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 613                                 $this->starttime = null;
 614                         }
 615
 616                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 617
 618                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 619                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 620
 621                         # Don't force edit summaries when a user is editing their own user or talk page
 622                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 623                                 $this->mTitle->getText() == $wgUser->getName() )
 624                         {
 625                                 $this->allowBlankSummary = true;
 626                         } else {
 627                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary');
 628                         }
 629
 630                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 631                 } else {
 632                         # Not a posted form? Start with nothing.
 633                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 634                         $this->textbox1  = '';
 635                         $this->summary   = '';
 636                         $this->edittime  = '';
 637                         $this->starttime = wfTimestampNow();
 638                         $this->edit      = false;
 639                         $this->preview   = false;
 640                         $this->save      = false;
 641                         $this->diff      = false;
 642                         $this->minoredit = false;
 643                         $this->watchthis = $request->getBool( 'watchthis', false ); // Watch may be overriden by request parameters
 644                         $this->recreate  = false;
 645
 646                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 647                                 $this->summary = $request->getVal( 'preloadtitle' );
 648                         }
 649                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 650                                 $this->summary = $request->getText( 'summary' );
 651                         }
 652
 653                         if ( $request->getVal( 'minor' ) ) {
 654                                 $this->minoredit = true;
 655                         }
 656                 }
 657
 658                 $this->bot = $request->getBool( 'bot', true );
 659                 $this->nosummary = $request->getBool( 'nosummary' );
 660
 661                 // FIXME: unused variable?
 662                 $this->oldid = $request->getInt( 'oldid' );
 663
 664                 $this->live = $request->getCheck( 'live' );
 665                 $this->editintro = $request->getText( 'editintro',
 666                         // Custom edit intro for new sections
 667                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 668
 669                 wfProfileOut( __METHOD__ );
 670
 671                 // Allow extensions to modify form data
 672                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 673         }
 674
 675         /**
 676          * Subpage overridable method for extracting the page content data from the
 677          * posted form to be placed in $this->textbox1, if using customized input
 678          * this method should be overrided and return the page text that will be used
 679          * for saving, preview parsing and so on...
 680          *
 681          * @param $request WebRequest
 682          */
 683         protected function importContentFormData( &$request ) {
 684                 return; // Don't do anything, EditPage already extracted wpTextbox1
 685         }
 686
 687         /**
 688          * Make sure the form isn't faking a user's credentials.
 689          *
 690          * @param $request WebRequest
 691          * @return bool
 692          * @private
 693          */
 694         function tokenOk( &$request ) {
 695                 global $wgUser;
 696                 $token = $request->getVal( 'wpEditToken' );
 697                 $this->mTokenOk = $wgUser->matchEditToken( $token );
 698                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
 699                 return $this->mTokenOk;
 700         }
 701
 702         /**
 703          * Show all applicable editing introductions
 704          */
 705         protected function showIntro() {
 706                 global $wgOut, $wgUser;
 707                 if ( $this->suppressIntro ) {
 708                         return;
 709                 }
 710
 711                 $namespace = $this->mTitle->getNamespace();
 712
 713                 if ( $namespace == NS_MEDIAWIKI ) {
 714                         # Show a warning if editing an interface message
 715                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
 716                 }
 717
 718                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
 719                 # Show log extract when the user is currently blocked
 720                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
 721                         $parts = explode( '/', $this->mTitle->getText(), 2 );
 722                         $username = $parts[0];
 723                         $user = User::newFromName( $username, false /* allow IP users*/ );
 724                         $ip = User::isIP( $username );
 725                         if ( !$user->isLoggedIn() && !$ip ) { # User does not exist
 726                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
 727                                         array( 'userpage-userdoesnotexist', $username ) );
 728                         } else if ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
 729                                 LogEventsList::showLogExtract(
 730                                         $wgOut,
 731                                         'block',
 732                                         $user->getUserPage()->getPrefixedText(),
 733                                         '',
 734                                         array(
 735                                                 'lim' => 1,
 736                                                 'showIfEmpty' => false,
 737                                                 'msgKey' => array(
 738                                                         'blocked-notice-logextract',
 739                                                         $user->getName() # Support GENDER in notice
 740                                                 )
 741                                         )
 742                                 );
 743                         }
 744                 }
 745                 # Try to add a custom edit intro, or use the standard one if this is not possible.
 746                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
 747                         if ( $wgUser->isLoggedIn() ) {
 748                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
 749                         } else {
 750                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
 751                         }
 752                 }
 753                 # Give a notice if the user is editing a deleted/moved page...
 754                 if ( !$this->mTitle->exists() ) {
 755                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle->getPrefixedText(),
 756                                 '', array( 'lim' => 10,
 757                                            'conds' => array( "log_action != 'revision'" ),
 758                                            'showIfEmpty' => false,
 759                                            'msgKey' => array( 'recreate-moveddeleted-warn') )
 760                         );
 761                 }
 762         }
 763
 764         /**
 765          * Attempt to show a custom editing introduction, if supplied
 766          *
 767          * @return bool
 768          */
 769         protected function showCustomIntro() {
 770                 if ( $this->editintro ) {
 771                         $title = Title::newFromText( $this->editintro );
 772                         if ( $title instanceof Title && $title->exists() && $title->userCanRead() ) {
 773                                 global $wgOut;
 774                                 // Added using template syntax, to take <noinclude>'s into account.
 775                                 $wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
 776                                 return true;
 777                         } else {
 778                                 return false;
 779                         }
 780                 } else {
 781                         return false;
 782                 }
 783         }
 784
 785         /**
 786          * Attempt submission (no UI)
 787          * @return one of the constants describing the result
 788          */
 789         function internalAttemptSave( &$result, $bot = false ) {
 790                 global $wgFilterCallback, $wgUser, $wgParser;
 791                 global $wgMaxArticleSize;
 792
 793                 wfProfileIn( __METHOD__  );
 794                 wfProfileIn( __METHOD__ . '-checks' );
 795
 796                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
 797                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
 798                         return self::AS_HOOK_ERROR;
 799                 }
 800
 801                 # Check image redirect
 802                 if ( $this->mTitle->getNamespace() == NS_FILE &&
 803                         Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
 804                         !$wgUser->isAllowed( 'upload' ) ) {
 805                                 if ( $wgUser->isAnon() ) {
 806                                         return self::AS_IMAGE_REDIRECT_ANON;
 807                                 } else {
 808                                         return self::AS_IMAGE_REDIRECT_LOGGED;
 809                                 }
 810                 }
 811
 812                 # Check for spam
 813                 $match = self::matchSummarySpamRegex( $this->summary );
 814                 if ( $match === false ) {
 815                         $match = self::matchSpamRegex( $this->textbox1 );
 816                 }
 817                 if ( $match !== false ) {
 818                         $result['spam'] = $match;
 819                         $ip = wfGetIP();
 820                         $pdbk = $this->mTitle->getPrefixedDBkey();
 821                         $match = str_replace( "\n", '', $match );
 822                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
 823                         wfProfileOut( __METHOD__ . '-checks' );
 824                         wfProfileOut( __METHOD__ );
 825                         return self::AS_SPAM_ERROR;
 826                 }
 827                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
 828                         # Error messages or other handling should be performed by the filter function
 829                         wfProfileOut( __METHOD__ . '-checks' );
 830                         wfProfileOut( __METHOD__ );
 831                         return self::AS_FILTERING;
 832                 }
 833                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
 834                         # Error messages etc. could be handled within the hook...
 835                         wfProfileOut( __METHOD__ . '-checks' );
 836                         wfProfileOut( __METHOD__ );
 837                         return self::AS_HOOK_ERROR;
 838                 } elseif ( $this->hookError != '' ) {
 839                         # ...or the hook could be expecting us to produce an error
 840                         wfProfileOut( __METHOD__ . '-checks' );
 841                         wfProfileOut( __METHOD__ );
 842                         return self::AS_HOOK_ERROR_EXPECTED;
 843                 }
 844                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 845                         # Check block state against master, thus 'false'.
 846                         wfProfileOut( __METHOD__ . '-checks' );
 847                         wfProfileOut( __METHOD__ );
 848                         return self::AS_BLOCKED_PAGE_FOR_USER;
 849                 }
 850                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
 851                 if ( $this->kblength > $wgMaxArticleSize ) {
 852                         // Error will be displayed by showEditForm()
 853                         $this->tooBig = true;
 854                         wfProfileOut( __METHOD__ . '-checks' );
 855                         wfProfileOut( __METHOD__ );
 856                         return self::AS_CONTENT_TOO_BIG;
 857                 }
 858
 859                 if ( !$wgUser->isAllowed( 'edit' ) ) {
 860                         if ( $wgUser->isAnon() ) {
 861                                 wfProfileOut( __METHOD__ . '-checks' );
 862                                 wfProfileOut( __METHOD__ );
 863                                 return self::AS_READ_ONLY_PAGE_ANON;
 864                         } else {
 865                                 wfProfileOut( __METHOD__ . '-checks' );
 866                                 wfProfileOut( __METHOD__ );
 867                                 return self::AS_READ_ONLY_PAGE_LOGGED;
 868                         }
 869                 }
 870
 871                 if ( wfReadOnly() ) {
 872                         wfProfileOut( __METHOD__ . '-checks' );
 873                         wfProfileOut( __METHOD__ );
 874                         return self::AS_READ_ONLY_PAGE;
 875                 }
 876                 if ( $wgUser->pingLimiter() ) {
 877                         wfProfileOut( __METHOD__ . '-checks' );
 878                         wfProfileOut( __METHOD__ );
 879                         return self::AS_RATE_LIMITED;
 880                 }
 881
 882                 # If the article has been deleted while editing, don't save it without
 883                 # confirmation
 884                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
 885                         wfProfileOut( __METHOD__ . '-checks' );
 886                         wfProfileOut( __METHOD__ );
 887                         return self::AS_ARTICLE_WAS_DELETED;
 888                 }
 889
 890                 wfProfileOut( __METHOD__ . '-checks' );
 891
 892                 # If article is new, insert it.
 893                 $aid = $this->mTitle->getArticleID( Title::GAID_FOR_UPDATE );
 894                 $new = ( $aid == 0 );
 895
 896                 if ( $new ) {
 897                         // Late check for create permission, just in case *PARANOIA*
 898                         if ( !$this->mTitle->userCan( 'create' ) ) {
 899                                 wfDebug( __METHOD__ . ": no create permission\n" );
 900                                 wfProfileOut( __METHOD__ );
 901                                 return self::AS_NO_CREATE_PERMISSION;
 902                         }
 903
 904                         # Don't save a new article if it's blank.
 905                         if ( $this->textbox1 == '' ) {
 906                                 wfProfileOut( __METHOD__ );
 907                                 return self::AS_BLANK_ARTICLE;
 908                         }
 909
 910                         // Run post-section-merge edit filter
 911                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
 912                                 # Error messages etc. could be handled within the hook...
 913                                 wfProfileOut( __METHOD__ );
 914                                 return self::AS_HOOK_ERROR;
 915                         } elseif ( $this->hookError != '' ) {
 916                                 # ...or the hook could be expecting us to produce an error
 917                                 wfProfileOut( __METHOD__ );
 918                                 return self::AS_HOOK_ERROR_EXPECTED;
 919                         }
 920
 921                         # Handle the user preference to force summaries here. Check if it's not a redirect.
 922                         if ( !$this->allowBlankSummary && !Title::newFromRedirect( $this->textbox1 ) ) {
 923                                 if ( md5( $this->summary ) == $this->autoSumm ) {
 924                                         $this->missingSummary = true;
 925                                         wfProfileOut( __METHOD__ );
 926                                         return self::AS_SUMMARY_NEEDED;
 927                                 }
 928                         }
 929
 930                         $text = $this->textbox1;
 931                         if ( $this->section == 'new' && $this->summary != '' ) {
 932                                 $text = wfMsgForContent( 'newsectionheaderdefaultlevel', $this->summary ) . "\n\n" . $text;
 933                         }
 934
 935                         $retval = self::AS_SUCCESS_NEW_ARTICLE;
 936
 937                 } else {
 938
 939                         # Article exists. Check for edit conflict.
 940
 941                         $this->mArticle->clear(); # Force reload of dates, etc.
 942                         $this->mArticle->forUpdate( true ); # Lock the article
 943
 944                         wfDebug( "timestamp: {$this->mArticle->getTimestamp()}, edittime: {$this->edittime}\n" );
 945
 946                         if ( $this->mArticle->getTimestamp() != $this->edittime ) {
 947                                 $this->isConflict = true;
 948                                 if ( $this->section == 'new' ) {
 949                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
 950                                                 $this->mArticle->getComment() == $this->summary ) {
 951                                                 // Probably a duplicate submission of a new comment.
 952                                                 // This can happen when squid resends a request after
 953                                                 // a timeout but the first one actually went through.
 954                                                 wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
 955                                         } else {
 956                                                 // New comment; suppress conflict.
 957                                                 $this->isConflict = false;
 958                                                 wfDebug( __METHOD__ .": conflict suppressed; new section\n" );
 959                                         }
 960                                 }
 961                         }
 962                         $userid = $wgUser->getId();
 963
 964                         # Suppress edit conflict with self, except for section edits where merging is required.
 965                         if ( $this->isConflict && $this->section == '' && $this->userWasLastToEdit( $userid, $this->edittime ) ) {
 966                                 wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
 967                                 $this->isConflict = false;
 968                         }
 969
 970                         if ( $this->isConflict ) {
 971                                 wfDebug( __METHOD__ . ": conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 972                                         $this->mArticle->getTimestamp() . "')\n" );
 973                                 $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime );
 974                         } else {
 975                                 wfDebug( __METHOD__ . ": getting section '$this->section'\n" );
 976                                 $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary );
 977                         }
 978                         if ( is_null( $text ) ) {
 979                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
 980                                 $this->isConflict = true;
 981                                 $text = $this->textbox1; // do not try to merge here!
 982                         } else if ( $this->isConflict ) {
 983                                 # Attempt merge
 984                                 if ( $this->mergeChangesInto( $text ) ) {
 985                                         // Successful merge! Maybe we should tell the user the good news?
 986                                         $this->isConflict = false;
 987                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
 988                                 } else {
 989                                         $this->section = '';
 990                                         $this->textbox1 = $text;
 991                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
 992                                 }
 993                         }
 994
 995                         if ( $this->isConflict ) {
 996                                 wfProfileOut( __METHOD__ );
 997                                 return self::AS_CONFLICT_DETECTED;
 998                         }
 999
1000                         $oldtext = $this->mArticle->getContent();
1001
1002                         // Run post-section-merge edit filter
1003                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError, $this->summary ) ) ) {
1004                                 # Error messages etc. could be handled within the hook...
1005                                 wfProfileOut( __METHOD__ );
1006                                 return self::AS_HOOK_ERROR;
1007                         } elseif ( $this->hookError != '' ) {
1008                                 # ...or the hook could be expecting us to produce an error
1009                                 wfProfileOut( __METHOD__ );
1010                                 return self::AS_HOOK_ERROR_EXPECTED;
1011                         }
1012
1013                         # Handle the user preference to force summaries here, but not for null edits
1014                         if ( $this->section != 'new' && !$this->allowBlankSummary && 0 != strcmp( $oldtext, $text )
1015                                 && !Title::newFromRedirect( $text ) ) # check if it's not a redirect
1016                         {
1017                                 if ( md5( $this->summary ) == $this->autoSumm ) {
1018                                         $this->missingSummary = true;
1019                                         wfProfileOut( __METHOD__ );
1020                                         return self::AS_SUMMARY_NEEDED;
1021                                 }
1022                         }
1023
1024                         # And a similar thing for new sections
1025                         if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1026                                 if ( trim( $this->summary ) == '' ) {
1027                                         $this->missingSummary = true;
1028                                         wfProfileOut( __METHOD__ );
1029                                         return self::AS_SUMMARY_NEEDED;
1030                                 }
1031                         }
1032
1033                         # All's well
1034                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1035                         $sectionanchor = '';
1036                         if ( $this->section == 'new' ) {
1037                                 if ( $this->textbox1 == '' ) {
1038                                         $this->missingComment = true;
1039                                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1040                                         wfProfileOut( __METHOD__ );
1041                                         return self::AS_TEXTBOX_EMPTY;
1042                                 }
1043                                 if ( $this->summary != '' ) {
1044                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1045                                         # This is a new section, so create a link to the new section
1046                                         # in the revision summary.
1047                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1048                                         $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1049                                 }
1050                         } elseif ( $this->section != '' ) {
1051                                 # Try to get a section anchor from the section source, redirect to edited section if header found
1052                                 # XXX: might be better to integrate this into Article::replaceSection
1053                                 # for duplicate heading checking and maybe parsing
1054                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1055                                 # we can't deal with anchors, includes, html etc in the header for now,
1056                                 # headline would need to be parsed to improve this
1057                                 if ( $hasmatch and strlen( $matches[2] ) > 0 ) {
1058                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1059                                 }
1060                         }
1061                         $result['sectionanchor'] = $sectionanchor;
1062                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1063
1064                         // Save errors may fall down to the edit form, but we've now
1065                         // merged the section into full text. Clear the section field
1066                         // so that later submission of conflict forms won't try to
1067                         // replace that into a duplicated mess.
1068                         $this->textbox1 = $text;
1069                         $this->section = '';
1070
1071                         $retval = self::AS_SUCCESS_UPDATE;
1072                 }
1073
1074                 // Check for length errors again now that the section is merged in
1075                 $this->kblength = (int)( strlen( $text ) / 1024 );
1076                 if ( $this->kblength > $wgMaxArticleSize ) {
1077                         $this->tooBig = true;
1078                         wfProfileOut( __METHOD__ );
1079                         return self::AS_MAX_ARTICLE_SIZE_EXCEEDED;
1080                 }
1081
1082                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1083                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1084                         ( $this->minoredit ? EDIT_MINOR : 0 ) |
1085                         ( $bot ? EDIT_FORCE_BOT : 0 );
1086
1087                 $status = $this->mArticle->doEdit( $text, $this->summary, $flags );
1088
1089                 if ( $status->isOK() ) {
1090                         $result['redirect'] = Title::newFromRedirect( $text ) !== null;
1091                         $this->commitWatch();
1092                         wfProfileOut( __METHOD__ );
1093                         return $retval;
1094                 } else {
1095                         $this->isConflict = true;
1096                         wfProfileOut( __METHOD__ );
1097                         return self::AS_END;
1098                 }
1099         }
1100
1101         /**
1102          * Commit the change of watch status
1103          */
1104         protected function commitWatch() {
1105                 if ( $this->watchthis xor $this->mTitle->userIsWatching() ) {
1106                         $dbw = wfGetDB( DB_MASTER );
1107                         $dbw->begin();
1108                         if ( $this->watchthis ) {
1109                                 $this->mArticle->doWatch();
1110                         } else {
1111                                 $this->mArticle->doUnwatch();
1112                         }
1113                         $dbw->commit();
1114                 }
1115         }
1116
1117         /**
1118          * Check if no edits were made by other users since
1119          * the time a user started editing the page. Limit to
1120          * 50 revisions for the sake of performance.
1121          */
1122         protected function userWasLastToEdit( $id, $edittime ) {
1123                 if( !$id ) return false;
1124                 $dbw = wfGetDB( DB_MASTER );
1125                 $res = $dbw->select( 'revision',
1126                         'rev_user',
1127                         array(
1128                                 'rev_page' => $this->mArticle->getId(),
1129                                 'rev_timestamp > '.$dbw->addQuotes( $dbw->timestamp($edittime) )
1130                         ),
1131                         __METHOD__,
1132                         array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
1133                 foreach ( $res as $row ) {
1134                         if( $row->rev_user != $id ) {
1135                                 return false;
1136                         }
1137                 }
1138                 return true;
1139         }
1140
1141         /**
1142          * Check given input text against $wgSpamRegex, and return the text of the first match.
1143          * @return mixed -- matching string or false
1144          */
1145         public static function matchSpamRegex( $text ) {
1146                 global $wgSpamRegex;
1147                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1148                 $regexes = (array)$wgSpamRegex;
1149                 return self::matchSpamRegexInternal( $text, $regexes );
1150         }
1151
1152         /**
1153          * Check given input text against $wgSpamRegex, and return the text of the first match.
1154          * @return mixed -- matching string or false
1155          */
1156         public static function matchSummarySpamRegex( $text ) {
1157                 global $wgSummarySpamRegex;
1158                 $regexes = (array)$wgSummarySpamRegex;
1159                 return self::matchSpamRegexInternal( $text, $regexes );
1160         }
1161
1162         protected static function matchSpamRegexInternal( $text, $regexes ) {
1163                 foreach( $regexes as $regex ) {
1164                         $matches = array();
1165                         if( preg_match( $regex, $text, $matches ) ) {
1166                                 return $matches[0];
1167                         }
1168                 }
1169                 return false;
1170         }
1171
1172         /**
1173          * Initialise form fields in the object
1174          * Called on the first invocation, e.g. when a user clicks an edit link
1175          * @returns bool -- if the requested section is valid
1176          */
1177         function initialiseForm() {
1178                 global $wgUser;
1179                 $this->edittime = $this->mArticle->getTimestamp();
1180                 $this->textbox1 = $this->getContent( false );
1181                 // activate checkboxes if user wants them to be always active
1182                 # Sort out the "watch" checkbox
1183                 if ( $wgUser->getOption( 'watchdefault' ) ) {
1184                         # Watch all edits
1185                         $this->watchthis = true;
1186                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1187                         # Watch creations
1188                         $this->watchthis = true;
1189                 } elseif ( $this->mTitle->userIsWatching() ) {
1190                         # Already watched
1191                         $this->watchthis = true;
1192                 }
1193                 if ( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
1194                 if ( $this->textbox1 === false ) return false;
1195                 wfProxyCheck();
1196                 return true;
1197         }
1198
1199         function setHeaders() {
1200                 global $wgOut, $wgTitle;
1201                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1202                 if ( $this->formtype == 'preview' ) {
1203                         $wgOut->setPageTitleActionText( wfMsg( 'preview' ) );
1204                 }
1205                 if ( $this->isConflict ) {
1206                         $wgOut->setPageTitle( wfMsg( 'editconflict', $wgTitle->getPrefixedText() ) );
1207                 } elseif ( $this->section != '' ) {
1208                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1209                         $wgOut->setPageTitle( wfMsg( $msg, $wgTitle->getPrefixedText() ) );
1210                 } else {
1211                         # Use the title defined by DISPLAYTITLE magic word when present
1212                         if ( isset( $this->mParserOutput )
1213                          && ( $dt = $this->mParserOutput->getDisplayTitle() ) !== false ) {
1214                                 $title = $dt;
1215                         } else {
1216                                 $title = $wgTitle->getPrefixedText();
1217                         }
1218                         $wgOut->setPageTitle( wfMsg( 'editing', $title ) );
1219                 }
1220         }
1221
1222         /**
1223          * Send the edit form and related headers to $wgOut
1224          * @param $formCallback Optional callable that takes an OutputPage
1225          *                      parameter; will be called during form output
1226          *                      near the top, for captchas and the like.
1227          */
1228         function showEditForm( $formCallback = null ) {
1229                 global $wgOut, $wgUser, $wgTitle;
1230
1231                 # If $wgTitle is null, that means we're in API mode.
1232                 # Some hook probably called this function  without checking
1233                 # for is_null($wgTitle) first. Bail out right here so we don't
1234                 # do lots of work just to discard it right after.
1235                 if ( is_null( $wgTitle ) )
1236                         return;
1237
1238                 wfProfileIn( __METHOD__ );
1239
1240                 $sk = $wgUser->getSkin();
1241
1242                 #need to parse the preview early so that we know which templates are used,
1243                 #otherwise users with "show preview after edit box" will get a blank list
1244                 #we parse this near the beginning so that setHeaders can do the title
1245                 #setting work instead of leaving it in getPreviewText
1246                 $previewOutput = '';
1247                 if ( $this->formtype == 'preview' ) {
1248                         $previewOutput = $this->getPreviewText();
1249                 }
1250
1251                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) );
1252
1253                 $this->setHeaders();
1254
1255                 # Enabled article-related sidebar, toplinks, etc.
1256                 $wgOut->setArticleRelated( true );
1257
1258                 if ( $this->showHeader() === false )
1259                         return;
1260
1261                 $action = htmlspecialchars( $this->getActionURL( $wgTitle ) );
1262
1263                 if ( $wgUser->getOption( 'showtoolbar' ) and !$this->isCssJsSubpage ) {
1264                         # prepare toolbar for edit buttons
1265                         $toolbar = EditPage::getEditToolbar();
1266                 } else {
1267                         $toolbar = '';
1268                 }
1269
1270
1271                 $wgOut->addHTML( $this->editFormPageTop );
1272
1273                 if ( $wgUser->getOption( 'previewontop' ) ) {
1274                         $this->displayPreviewArea( $previewOutput, true );
1275                 }
1276
1277                 $wgOut->addHTML( $this->editFormTextTop );
1278
1279                 $templates = $this->getTemplates();
1280                 $formattedtemplates = $sk->formatTemplates( $templates, $this->preview, $this->section != '');
1281
1282                 $hiddencats = $this->mArticle->getHiddenCategories();
1283                 $formattedhiddencats = $sk->formatHiddenCategories( $hiddencats );
1284
1285                 if ( $this->wasDeletedSinceLastEdit() && 'save' != $this->formtype ) {
1286                         $wgOut->wrapWikiMsg(
1287                                 "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
1288                                 'deletedwhileediting' );
1289                 } elseif ( $this->wasDeletedSinceLastEdit() ) {
1290                         // Hide the toolbar and edit area, user can click preview to get it back
1291                         // Add an confirmation checkbox and explanation.
1292                         $toolbar = '';
1293                         // @todo move this to a cleaner conditional instead of blanking a variable
1294                 }
1295                 $wgOut->addHTML( <<<HTML
1296 {$toolbar}
1297 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1298 HTML
1299 );
1300
1301                 if ( is_callable( $formCallback ) ) {
1302                         call_user_func_array( $formCallback, array( &$wgOut ) );
1303                 }
1304
1305                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1306
1307                 // Put these up at the top to ensure they aren't lost on early form submission
1308                 $this->showFormBeforeText();
1309
1310                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
1311                         $username = $this->lastDelete->user_name;
1312                         $comment = $this->lastDelete->log_comment;
1313
1314                         // It is better to not parse the comment at all than to have templates expanded in the middle
1315                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
1316                         $wgOut->addHTML(
1317                                 '<div class="mw-confirm-recreate">' .
1318                                 wfMsgExt( 'confirmrecreate', 'parseinline', $username, "<nowiki>$comment</nowiki>" ) .
1319                                 Xml::checkLabel( wfMsg( 'recreate' ), 'wpRecreate', 'wpRecreate', false,
1320                                         array( 'title' => $sk->titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
1321                                 ) .
1322                                 '</div>'
1323                         );
1324                 }
1325
1326                 # If a blank edit summary was previously provided, and the appropriate
1327                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1328                 # user being bounced back more than once in the event that a summary
1329                 # is not required.
1330                 #####
1331                 # For a bit more sophisticated detection of blank summaries, hash the
1332                 # automatic one and pass that in the hidden field wpAutoSummary.
1333                 if ( $this->missingSummary ||
1334                         ( $this->section == 'new' && $this->nosummary ) )
1335                                 $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
1336                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1337                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
1338
1339                 $wgOut->addHTML( Html::hidden( 'oldid', $this->mArticle->getOldID() ) );
1340
1341                 if ( $this->section == 'new' ) {
1342                         $this->showSummaryInput( true, $this->summary );
1343                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
1344                 }
1345
1346                 $wgOut->addHTML( $this->editFormTextBeforeContent );
1347
1348                 if ( $this->isConflict ) {
1349                         // In an edit conflict bypass the overrideable content form method
1350                         // and fallback to the raw wpTextbox1 since editconflicts can't be
1351                         // resolved between page source edits and custom ui edits using the
1352                         // custom edit ui.
1353                         $this->showTextbox1( null, $this->getContent() );
1354                 } else {
1355                         $this->showContentForm();
1356                 }
1357
1358                 $wgOut->addHTML( $this->editFormTextAfterContent );
1359
1360                 $wgOut->addWikiText( $this->getCopywarn() );
1361                 if ( isset($this->editFormTextAfterWarn) && $this->editFormTextAfterWarn !== '' )
1362                         $wgOut->addHTML( $this->editFormTextAfterWarn );
1363
1364                 $this->showStandardInputs();
1365
1366                 $this->showFormAfterText();
1367
1368                 $this->showTosSummary();
1369                 $this->showEditTools();
1370
1371                 $wgOut->addHTML( <<<HTML
1372 {$this->editFormTextAfterTools}
1373 <div class='templatesUsed'>
1374 {$formattedtemplates}
1375 </div>
1376 <div class='hiddencats'>
1377 {$formattedhiddencats}
1378 </div>
1379 HTML
1380 );
1381
1382                 if ( $this->isConflict )
1383                         $this->showConflict();
1384
1385                 $wgOut->addHTML( $this->editFormTextBottom );
1386                 $wgOut->addHTML( "</form>\n" );
1387                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1388                         $this->displayPreviewArea( $previewOutput, false );
1389                 }
1390
1391                 wfProfileOut( __METHOD__ );
1392         }
1393
1394         protected function showHeader() {
1395                 global $wgOut, $wgUser, $wgTitle, $wgMaxArticleSize, $wgLang;
1396                 if ( $this->isConflict ) {
1397                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
1398                         $this->edittime = $this->mArticle->getTimestamp();
1399                 } else {
1400                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
1401                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
1402                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
1403                                 // Someone is welcome to try refactoring though
1404                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
1405                                 return false;
1406                         }
1407
1408                         if ( $this->section != '' && $this->section != 'new' ) {
1409                                 $matches = array();
1410                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
1411                                         preg_match( "/^(=+)(.+)\\1/mi", $this->textbox1, $matches );
1412                                         if ( !empty( $matches[2] ) ) {
1413                                                 global $wgParser;
1414                                                 $this->summary = "/* " .
1415                                                         $wgParser->stripSectionName(trim($matches[2])) .
1416                                                         " */ ";
1417                                         }
1418                                 }
1419                         }
1420
1421                         if ( $this->missingComment ) {
1422                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
1423                         }
1424
1425                         if ( $this->missingSummary && $this->section != 'new' ) {
1426                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
1427                         }
1428
1429                         if ( $this->missingSummary && $this->section == 'new' ) {
1430                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
1431                         }
1432
1433                         if ( $this->hookError !== '' ) {
1434                                 $wgOut->addWikiText( $this->hookError );
1435                         }
1436
1437                         if ( !$this->checkUnicodeCompliantBrowser() ) {
1438                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
1439                         }
1440
1441                         if ( isset( $this->mArticle ) && isset( $this->mArticle->mRevision ) ) {
1442                         // Let sysop know that this will make private content public if saved
1443
1444                                 if ( !$this->mArticle->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1445                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
1446                                 } else if ( $this->mArticle->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1447                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
1448                                 }
1449
1450                                 if ( !$this->mArticle->mRevision->isCurrent() ) {
1451                                         $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
1452                                         $wgOut->addWikiMsg( 'editingold' );
1453                                 }
1454                         }
1455                 }
1456
1457                 if ( wfReadOnly() ) {
1458                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
1459                 } elseif ( $wgUser->isAnon() ) {
1460                         if ( $this->formtype != 'preview' ) {
1461                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
1462                         } else {
1463                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
1464                         }
1465                 } else {
1466                         if ( $this->isCssJsSubpage ) {
1467                                 # Check the skin exists
1468                                 if ( $this->isWrongCaseCssJsPage ) {
1469                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $wgTitle->getSkinFromCssJsSubpage() ) );
1470                                 }
1471                                 if ( $this->formtype !== 'preview' ) {
1472                                         if ( $this->isCssSubpage )
1473                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
1474                                         if ( $this->isJsSubpage )
1475                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
1476                                 }
1477                         }
1478                 }
1479
1480                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
1481                         # Is the title semi-protected?
1482                         if ( $this->mTitle->isSemiProtected() ) {
1483                                 $noticeMsg = 'semiprotectedpagewarning';
1484                         } else {
1485                                 # Then it must be protected based on static groups (regular)
1486                                 $noticeMsg = 'protectedpagewarning';
1487                         }
1488                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle->getPrefixedText(), '',
1489                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
1490                 }
1491                 if ( $this->mTitle->isCascadeProtected() ) {
1492                         # Is this page under cascading protection from some source pages?
1493                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1494                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
1495                         $cascadeSourcesCount = count( $cascadeSources );
1496                         if ( $cascadeSourcesCount > 0 ) {
1497                                 # Explain, and list the titles responsible
1498                                 foreach( $cascadeSources as $page ) {
1499                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1500                                 }
1501                         }
1502                         $notice .= '</div>';
1503                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
1504                 }
1505                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
1506                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle->getPrefixedText(), '',
1507                                 array(  'lim' => 1,
1508                                         'showIfEmpty' => false,
1509                                         'msgKey' => array( 'titleprotectedwarning' ),
1510                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
1511                 }
1512
1513                 if ( $this->kblength === false ) {
1514                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1515                 }
1516
1517                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
1518                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
1519                                 array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
1520                 } else {
1521                         if( !wfMessage('longpage-hint')->isDisabled() ) {
1522                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
1523                                         array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
1524                                 );
1525                         }
1526                 }
1527         }
1528
1529         /**
1530          * Standard summary input and label (wgSummary), abstracted so EditPage
1531          * subclasses may reorganize the form.
1532          * Note that you do not need to worry about the label's for=, it will be
1533          * inferred by the id given to the input. You can remove them both by
1534          * passing array( 'id' => false ) to $userInputAttrs.
1535          *
1536          * @param $summary The value of the summary input
1537          * @param $labelText The html to place inside the label
1538          * @param $inputAttrs An array of attrs to use on the input
1539          * @param $spanLabelAttrs An array of attrs to use on the span inside the label
1540          *
1541          * @return array An array in the format array( $label, $input )
1542          */
1543         function getSummaryInput($summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null) {
1544                 global $wgUser;
1545                 //Note: the maxlength is overriden in JS to 250 and to make it use UTF-8 bytes, not characters.
1546                 $inputAttrs = ( is_array($inputAttrs) ? $inputAttrs : array() ) + array(
1547                         'id' => 'wpSummary',
1548                         'maxlength' => '200',
1549                         'tabindex' => '1',
1550                         'size' => 60,
1551                         'spellcheck' => 'true',
1552                 ) + $wgUser->getSkin()->tooltipAndAccessKeyAttribs( 'summary' );
1553
1554                 $spanLabelAttrs = ( is_array($spanLabelAttrs) ? $spanLabelAttrs : array() ) + array(
1555                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
1556                         'id' => "wpSummaryLabel"
1557                 );
1558
1559                 $label = null;
1560                 if ( $labelText ) {
1561                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
1562                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
1563                 }
1564
1565                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
1566
1567                 return array( $label, $input );
1568         }
1569
1570         /**
1571          * @param $isSubjectPreview Boolean: true if this is the section subject/title
1572          *                          up top, or false if this is the comment summary
1573          *                          down below the textarea
1574          * @param $summary String: The text of the summary to display
1575          * @return String
1576          */
1577         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
1578                 global $wgOut, $wgContLang;
1579                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
1580                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
1581                 if ( $isSubjectPreview ) {
1582                         if ( $this->nosummary )
1583                                 return;
1584                 } else {
1585                         if ( !$this->mShowSummaryField )
1586                                 return;
1587                 }
1588                 $summary = $wgContLang->recodeForEdit( $summary );
1589                 $labelText = wfMsgExt( $isSubjectPreview ? 'subject' : 'summary', 'parseinline' );
1590                 list($label, $input) = $this->getSummaryInput($summary, $labelText, array( 'class' => $summaryClass ), array());
1591                 $wgOut->addHTML("{$label} {$input}");
1592         }
1593
1594         /**
1595          * @param $isSubjectPreview Boolean: true if this is the section subject/title
1596          *                          up top, or false if this is the comment summary
1597          *                          down below the textarea
1598          * @param $summary String: the text of the summary to display
1599          * @return String
1600          */
1601         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
1602                 if ( !$summary || ( !$this->preview && !$this->diff ) )
1603                         return "";
1604
1605                 global $wgParser, $wgUser;
1606                 $sk = $wgUser->getSkin();
1607
1608                 if ( $isSubjectPreview )
1609                         $summary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $summary ) );
1610
1611                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
1612
1613                 $summary = wfMsgExt( $message, 'parseinline' ) . $sk->commentBlock( $summary, $this->mTitle, $isSubjectPreview );
1614                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
1615         }
1616
1617         protected function showFormBeforeText() {
1618                 global $wgOut;
1619                 $section = htmlspecialchars( $this->section );
1620                 $wgOut->addHTML( <<<HTML
1621 <input type='hidden' value="{$section}" name="wpSection" />
1622 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
1623 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
1624 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
1625
1626 HTML
1627                 );
1628                 if ( !$this->checkUnicodeCompliantBrowser() )
1629                         $wgOut->addHTML(Html::hidden( 'safemode', '1' ));
1630         }
1631
1632         protected function showFormAfterText() {
1633                 global $wgOut, $wgUser;
1634                 /**
1635                  * To make it harder for someone to slip a user a page
1636                  * which submits an edit form to the wiki without their
1637                  * knowledge, a random token is associated with the login
1638                  * session. If it's not passed back with the submission,
1639                  * we won't save the page, or render user JavaScript and
1640                  * CSS previews.
1641                  *
1642                  * For anon editors, who may not have a session, we just
1643                  * include the constant suffix to prevent editing from
1644                  * broken text-mangling proxies.
1645                  */
1646                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->editToken() ) . "\n" );
1647         }
1648
1649         /**
1650          * Subpage overridable method for printing the form for page content editing
1651          * By default this simply outputs wpTextbox1
1652          * Subclasses can override this to provide a custom UI for editing;
1653          * be it a form, or simply wpTextbox1 with a modified content that will be
1654          * reverse modified when extracted from the post data.
1655          * Note that this is basically the inverse for importContentFormData
1656          */
1657         protected function showContentForm() {
1658                 $this->showTextbox1();
1659         }
1660
1661         /**
1662          * Method to output wpTextbox1
1663          * The $textoverride method can be used by subclasses overriding showContentForm
1664          * to pass back to this method.
1665          *
1666          * @param $customAttribs An array of html attributes to use in the textarea
1667          * @param $textoverride String: optional text to override $this->textarea1 with
1668          */
1669         protected function showTextbox1($customAttribs = null, $textoverride = null) {
1670                 $classes = array(); // Textarea CSS
1671                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
1672                         # Is the title semi-protected?
1673                         if ( $this->mTitle->isSemiProtected() ) {
1674                                 $classes[] = 'mw-textarea-sprotected';
1675                         } else {
1676                                 # Then it must be protected based on static groups (regular)
1677                                 $classes[] = 'mw-textarea-protected';
1678                         }
1679                 }
1680                 $attribs = array( 'tabindex' => 1 );
1681                 if ( is_array($customAttribs) )
1682                         $attribs += $customAttribs;
1683
1684                 if ( $this->wasDeletedSinceLastEdit() )
1685                         $attribs['type'] = 'hidden';
1686                 if ( !empty( $classes ) ) {
1687                         if ( isset($attribs['class']) )
1688                                 $classes[] = $attribs['class'];
1689                         $attribs['class'] = implode( ' ', $classes );
1690                 }
1691
1692                 $this->showTextbox( isset($textoverride) ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
1693         }
1694
1695         protected function showTextbox2() {
1696                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6 ) );
1697         }
1698
1699         protected function showTextbox( $content, $name, $customAttribs = array() ) {
1700                 global $wgOut, $wgUser;
1701
1702                 $wikitext = $this->safeUnicodeOutput( $content );
1703                 if ( $wikitext !== '' ) {
1704                         // Ensure there's a newline at the end, otherwise adding lines
1705                         // is awkward.
1706                         // But don't add a newline if the ext is empty, or Firefox in XHTML
1707                         // mode will show an extra newline. A bit annoying.
1708                         $wikitext .= "\n";
1709                 }
1710
1711                 $attribs = $customAttribs + array(
1712                         'accesskey' => ',',
1713                         'id'   => $name,
1714                         'cols' => $wgUser->getIntOption( 'cols' ),
1715                         'rows' => $wgUser->getIntOption( 'rows' ),
1716                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
1717                 );
1718
1719                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
1720         }
1721
1722         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
1723                 global $wgOut;
1724                 $classes = array();
1725                 if ( $isOnTop )
1726                         $classes[] = 'ontop';
1727
1728                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
1729
1730                 if ( $this->formtype != 'preview' )
1731                         $attribs['style'] = 'display: none;';
1732
1733                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
1734
1735                 if ( $this->formtype == 'preview' ) {
1736                         $this->showPreview( $previewOutput );
1737                 }
1738
1739                 $wgOut->addHTML( '</div>' );
1740
1741                 if ( $this->formtype == 'diff') {
1742                         $this->showDiff();
1743                 }
1744         }
1745
1746         /**
1747          * Append preview output to $wgOut.
1748          * Includes category rendering if this is a category page.
1749          *
1750          * @param $text String: the HTML to be output for the preview.
1751          */
1752         protected function showPreview( $text ) {
1753                 global $wgOut;
1754                 if ( $this->mTitle->getNamespace() == NS_CATEGORY) {
1755                         $this->mArticle->openShowCategory();
1756                 }
1757                 # This hook seems slightly odd here, but makes things more
1758                 # consistent for extensions.
1759                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
1760                 $wgOut->addHTML( $text );
1761                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1762                         $this->mArticle->closeShowCategory();
1763                 }
1764         }
1765
1766         /**
1767          * Give a chance for site and per-namespace customizations of
1768          * terms of service summary link that might exist separately
1769          * from the copyright notice.
1770          *
1771          * This will display between the save button and the edit tools,
1772          * so should remain short!
1773          */
1774         protected function showTosSummary() {
1775                 $msg = 'editpage-tos-summary';
1776                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
1777                 if( !wfMessage( $msg )->isDisabled() ) {
1778                         global $wgOut;
1779                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
1780                         $wgOut->addWikiMsgArray( $msg, array() );
1781                         $wgOut->addHTML( '</div>' );
1782                 }
1783         }
1784
1785         protected function showEditTools() {
1786                 global $wgOut;
1787                 $wgOut->addHTML( '<div class="mw-editTools">' );
1788                 $wgOut->addWikiMsgArray( 'edittools', array(), array( 'content' ) );
1789                 $wgOut->addHTML( '</div>' );
1790         }
1791
1792         protected function getCopywarn() {
1793                 global $wgRightsText;
1794                 if ( $wgRightsText ) {
1795                         $copywarnMsg = array( 'copyrightwarning',
1796                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
1797                                 $wgRightsText );
1798                 } else {
1799                         $copywarnMsg = array( 'copyrightwarning2',
1800                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
1801                 }
1802                 // Allow for site and per-namespace customization of contribution/copyright notice.
1803                 wfRunHooks( 'EditPageCopyrightWarning', array( $this->mTitle, &$copywarnMsg ) );
1804
1805                 return "<div id=\"editpage-copywarn\">\n" . call_user_func_array("wfMsgNoTrans", $copywarnMsg) . "\n</div>";
1806         }
1807
1808         protected function showStandardInputs( &$tabindex = 2 ) {
1809                 global $wgOut, $wgUser;
1810                 $wgOut->addHTML( "<div class='editOptions'>\n" );
1811
1812                 if ( $this->section != 'new' ) {
1813                         $this->showSummaryInput( false, $this->summary );
1814                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
1815                 }
1816
1817                 $checkboxes = $this->getCheckboxes( $tabindex, $wgUser->getSkin(),
1818                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
1819                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
1820                 $wgOut->addHTML( "<div class='editButtons'>\n" );
1821                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
1822
1823                 $cancel = $this->getCancelLink();
1824                 $separator = wfMsgExt( 'pipe-separator' , 'escapenoentities' );
1825                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ) );
1826                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
1827                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
1828                         htmlspecialchars( wfMsg( 'newwindow' ) );
1829                 $wgOut->addHTML( "      <span class='editHelp'>{$cancel}{$separator}{$edithelp}</span>\n" );
1830                 $wgOut->addHTML( "</div><!-- editButtons -->\n</div><!-- editOptions -->\n" );
1831         }
1832
1833         /*
1834          * Show an edit conflict. textbox1 is already shown in showEditForm().
1835          * If you want to use another entry point to this function, be careful.
1836          */
1837         protected function showConflict() {
1838                 global $wgOut;
1839                 $this->textbox2 = $this->textbox1;
1840                 $this->textbox1 = $this->getContent();
1841                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
1842                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
1843
1844                         $de = new DifferenceEngine( $this->mTitle );
1845                         $de->setText( $this->textbox2, $this->textbox1 );
1846                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1847
1848                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
1849                         $this->showTextbox2();
1850                 }
1851         }
1852
1853         protected function getLastDelete() {
1854                 $dbr = wfGetDB( DB_SLAVE );
1855                 $data = $dbr->selectRow(
1856                         array( 'logging', 'user' ),
1857                         array( 'log_type',
1858                                'log_action',
1859                                'log_timestamp',
1860                                'log_user',
1861                                'log_namespace',
1862                                'log_title',
1863                                'log_comment',
1864                                'log_params',
1865                                'log_deleted',
1866                                'user_name' ),
1867                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1868                                'log_title' => $this->mTitle->getDBkey(),
1869                                'log_type' => 'delete',
1870                                'log_action' => 'delete',
1871                                'user_id=log_user' ),
1872                         __METHOD__,
1873                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
1874                 );
1875                 // Quick paranoid permission checks...
1876                 if( is_object( $data ) ) {
1877                         if( $data->log_deleted & LogPage::DELETED_USER )
1878                                 $data->user_name = wfMsgHtml( 'rev-deleted-user' );
1879                         if( $data->log_deleted & LogPage::DELETED_COMMENT )
1880                                 $data->log_comment = wfMsgHtml( 'rev-deleted-comment' );
1881                 }
1882                 return $data;
1883         }
1884
1885         /**
1886          * Get the rendered text for previewing.
1887          * @return string
1888          */
1889         function getPreviewText() {
1890                 global $wgOut, $wgUser, $wgParser, $wgMessageCache;
1891
1892                 wfProfileIn( __METHOD__ );
1893
1894                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1895                         if ( $this->mTokenOkExceptSuffix ) {
1896                                 $note = wfMsg( 'token_suffix_mismatch' );
1897                         } else {
1898                                 $note = wfMsg( 'session_fail_preview' );
1899                         }
1900                 } else {
1901                         $note = wfMsg( 'previewnote' );
1902                 }
1903
1904                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1905                 $parserOptions->setEditSection( false );
1906                 $parserOptions->setIsPreview( true );
1907                 $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
1908
1909                 global $wgRawHtml;
1910                 if ( $wgRawHtml && !$this->mTokenOk ) {
1911                         // Could be an offsite preview attempt. This is very unsafe if
1912                         // HTML is enabled, as it could be an attack.
1913                         return $wgOut->parse( "<div class='previewnote'>" .
1914                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1915                 }
1916
1917                 # don't parse user css/js, show message about preview
1918                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here -- This note has been there since r3530. Sure the bug was fixed time ago?
1919
1920                 if ( $this->isCssJsSubpage || $this->mTitle->isCssOrJsPage() ) {
1921                         $level = 'user';
1922                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1923                                 $level = 'site';
1924                         }
1925
1926                         # Used messages to make sure grep find them:
1927                         # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
1928                         if (preg_match( "/\\.css$/", $this->mTitle->getText() ) ) {
1929                                 $previewtext = "<div id='mw-{$level}csspreview'>\n" . wfMsg( "{$level}csspreview" ) . "\n</div>";
1930                                 $class = "mw-code mw-css";
1931                         } elseif (preg_match( "/\\.js$/", $this->mTitle->getText() ) ) {
1932                                 $previewtext = "<div id='mw-{$level}jspreview'>\n" . wfMsg( "{$level}jspreview" ) . "\n</div>";
1933                                 $class = "mw-code mw-js";
1934                         } else {
1935                                 throw new MWException( 'A CSS/JS (sub)page but which is not css nor js!' );
1936                         }
1937
1938                         $parserOptions->setTidy( true );
1939                         $parserOutput = $wgParser->parse( $previewtext, $this->mTitle, $parserOptions );
1940                         $previewHTML = $parserOutput->mText;
1941                         $previewHTML .= "<pre class=\"$class\" dir=\"ltr\">\n" . htmlspecialchars( $this->textbox1 ) . "\n</pre>\n";
1942                 } else {
1943                         $rt = Title::newFromRedirectArray( $this->textbox1 );
1944                         if ( $rt ) {
1945                                 $previewHTML = $this->mArticle->viewRedirect( $rt, false );
1946                         } else {
1947                                 $toparse = $this->textbox1;
1948
1949                                 # If we're adding a comment, we need to show the
1950                                 # summary as the headline
1951                                 if ( $this->section == "new" && $this->summary != "" ) {
1952                                         $toparse = "== {$this->summary} ==\n\n" . $toparse;
1953                                 }
1954
1955                                 wfRunHooks( 'EditPageGetPreviewText', array( $this, &$toparse ) );
1956
1957                                 // Parse mediawiki messages with correct target language
1958                                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1959                                         list( /* $unused */, $lang ) = $wgMessageCache->figureMessage( $this->mTitle->getText() );
1960                                         $obj = wfGetLangObj( $lang );
1961                                         $parserOptions->setTargetLanguage( $obj );
1962                                 }
1963
1964                                 $parserOptions->setTidy( true );
1965                                 $parserOptions->enableLimitReport();
1966                                 $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ),
1967                                         $this->mTitle, $parserOptions );
1968
1969                                 $previewHTML = $parserOutput->getText();
1970                                 $this->mParserOutput = $parserOutput;
1971                                 $wgOut->addParserOutputNoText( $parserOutput );
1972
1973                                 if ( count( $parserOutput->getWarnings() ) ) {
1974                                         $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
1975                                 }
1976                         }
1977                 }
1978
1979                 if( $this->isConflict ) {
1980                         $conflict = '<h2 id="mw-previewconflict">' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1981                 } else {
1982                         $conflict = '<hr />';
1983                 }
1984
1985                 $previewhead = "<div class='previewnote'>\n" .
1986                         '<h2 id="mw-previewheader">' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>" .
1987                         $wgOut->parse( $note ) . $conflict . "</div>\n";
1988
1989                 wfProfileOut( __METHOD__ );
1990                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
1991         }
1992
1993         function getTemplates() {
1994                 if ( $this->preview || $this->section != '' ) {
1995                         $templates = array();
1996                         if ( !isset( $this->mParserOutput ) ) return $templates;
1997                         foreach( $this->mParserOutput->getTemplates() as $ns => $template) {
1998                                 foreach( array_keys( $template ) as $dbk ) {
1999                                         $templates[] = Title::makeTitle($ns, $dbk);
2000                                 }
2001                         }
2002                         return $templates;
2003                 } else {
2004                         return $this->mArticle->getUsedTemplates();
2005                 }
2006         }
2007
2008         /**
2009          * Call the stock "user is blocked" page
2010          */
2011         function blockedPage() {
2012                 global $wgOut;
2013                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
2014
2015                 # If the user made changes, preserve them when showing the markup
2016                 # (This happens when a user is blocked during edit, for instance)
2017                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
2018                 if ( $first ) {
2019                         $source = $this->mTitle->exists() ? $this->getContent() : false;
2020                 } else {
2021                         $source = $this->textbox1;
2022                 }
2023
2024                 # Spit out the source or the user's modified version
2025                 if ( $source !== false ) {
2026                         $wgOut->addHTML( '<hr />' );
2027                         $wgOut->addWikiMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() );
2028                         $this->showTextbox1( array( 'readonly' ), $source );
2029                 }
2030         }
2031
2032         /**
2033          * Produce the stock "please login to edit pages" page
2034          */
2035         function userNotLoggedInPage() {
2036                 global $wgUser, $wgOut, $wgTitle;
2037                 $skin = $wgUser->getSkin();
2038
2039                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
2040                 $loginLink = $skin->link(
2041                         $loginTitle,
2042                         wfMsgHtml( 'loginreqlink' ),
2043                         array(),
2044                         array( 'returnto' => $wgTitle->getPrefixedText() ),
2045                         array( 'known', 'noclasses' )
2046                 );
2047
2048                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
2049                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2050                 $wgOut->setArticleRelated( false );
2051
2052                 $wgOut->addHTML( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
2053                 $wgOut->returnToMain( false, $wgTitle );
2054         }
2055
2056         /**
2057          * Creates a basic error page which informs the user that
2058          * they have attempted to edit a nonexistent section.
2059          */
2060         function noSuchSectionPage() {
2061                 global $wgOut;
2062
2063                 $wgOut->setPageTitle( wfMsg( 'nosuchsectiontitle' ) );
2064                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2065                 $wgOut->setArticleRelated( false );
2066
2067                 $res = wfMsgExt( 'nosuchsectiontext', 'parse', $this->section );
2068                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
2069                 $wgOut->addHTML( $res );
2070
2071                 $wgOut->returnToMain( false, $this->mTitle );
2072         }
2073
2074         /**
2075          * Produce the stock "your edit contains spam" page
2076          *
2077          * @param $match Text which triggered one or more filters
2078          * @deprecated Use method spamPageWithContent() instead
2079          */
2080         static function spamPage( $match = false ) {
2081                 global $wgOut, $wgTitle;
2082
2083                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
2084                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2085                 $wgOut->setArticleRelated( false );
2086
2087                 $wgOut->addHTML( '<div id="spamprotected">' );
2088                 $wgOut->addWikiMsg( 'spamprotectiontext' );
2089                 if ( $match ) {
2090                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
2091                 }
2092                 $wgOut->addHTML( '</div>' );
2093
2094                 $wgOut->returnToMain( false, $wgTitle );
2095         }
2096
2097         /**
2098          * Show "your edit contains spam" page with your diff and text
2099          *
2100          * @param $match Text which triggered one or more filters
2101          */
2102         public function spamPageWithContent( $match = false ) {
2103                 global $wgOut, $wgTitle;
2104                 $this->textbox2 = $this->textbox1;
2105
2106                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
2107                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2108                 $wgOut->setArticleRelated( false );
2109
2110                 $wgOut->addHTML( '<div id="spamprotected">' );
2111                 $wgOut->addWikiMsg( 'spamprotectiontext' );
2112                 if ( $match ) {
2113                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
2114                 }
2115                 $wgOut->addHTML( '</div>' );
2116
2117                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2118                 $de = new DifferenceEngine( $this->mTitle );
2119                 $de->setText( $this->getContent(), $this->textbox2 );
2120                 $de->showDiff( wfMsg( "storedversion" ), wfMsg( "yourtext" ) );
2121
2122                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2123                 $this->showTextbox2();
2124
2125                 $wgOut->addReturnTo( $wgTitle, array( 'action' => 'edit' ) );
2126         }
2127
2128
2129         /**
2130          * @private
2131          * @todo document
2132          */
2133         function mergeChangesInto( &$editText ){
2134                 wfProfileIn( __METHOD__ );
2135
2136                 $db = wfGetDB( DB_MASTER );
2137
2138                 // This is the revision the editor started from
2139                 $baseRevision = $this->getBaseRevision();
2140                 if ( is_null( $baseRevision ) ) {
2141                         wfProfileOut( __METHOD__ );
2142                         return false;
2143                 }
2144                 $baseText = $baseRevision->getText();
2145
2146                 // The current state, we want to merge updates into it
2147                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2148                 if ( is_null( $currentRevision ) ) {
2149                         wfProfileOut( __METHOD__ );
2150                         return false;
2151                 }
2152                 $currentText = $currentRevision->getText();
2153
2154                 $result = '';
2155                 if ( wfMerge( $baseText, $editText, $currentText, $result ) ) {
2156                         $editText = $result;
2157                         wfProfileOut( __METHOD__ );
2158                         return true;
2159                 } else {
2160                         wfProfileOut( __METHOD__ );
2161                         return false;
2162                 }
2163         }
2164
2165         /**
2166          * Check if the browser is on a blacklist of user-agents known to
2167          * mangle UTF-8 data on form submission. Returns true if Unicode
2168          * should make it through, false if it's known to be a problem.
2169          * @return bool
2170          * @private
2171          */
2172         function checkUnicodeCompliantBrowser() {
2173                 global $wgBrowserBlackList;
2174                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
2175                         // No User-Agent header sent? Trust it by default...
2176                         return true;
2177                 }
2178                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
2179                 foreach ( $wgBrowserBlackList as $browser ) {
2180                         if ( preg_match($browser, $currentbrowser) ) {
2181                                 return false;
2182                         }
2183                 }
2184                 return true;
2185         }
2186
2187         /**
2188          * @deprecated use $wgParser->stripSectionName()
2189          */
2190         function pseudoParseSectionAnchor( $text ) {
2191                 global $wgParser;
2192                 return $wgParser->stripSectionName( $text );
2193         }
2194
2195         /**
2196          * Format an anchor fragment as it would appear for a given section name
2197          * @param $text String
2198          * @return String
2199          * @private
2200          */
2201         function sectionAnchor( $text ) {
2202                 global $wgParser;
2203                 return $wgParser->guessSectionNameFromWikiText( $text );
2204         }
2205
2206         /**
2207          * Shows a bulletin board style toolbar for common editing functions.
2208          * It can be disabled in the user preferences.
2209          * The necessary JavaScript code can be found in skins/common/edit.js.
2210          *
2211          * @return string
2212          */
2213         static function getEditToolbar() {
2214                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
2215                 global $wgUseTeX, $wgEnableUploads, $wgForeignFileRepos;
2216
2217                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
2218
2219                 /**
2220
2221                  * toolarray an array of arrays which each include the filename of
2222                  * the button image (without path), the opening tag, the closing tag,
2223                  * and optionally a sample text that is inserted between the two when no
2224                  * selection is highlighted.
2225                  * The tip text is shown when the user moves the mouse over the button.
2226                  *
2227                  * Already here are accesskeys (key), which are not used yet until someone
2228                  * can figure out a way to make them work in IE. However, we should make
2229                  * sure these keys are not defined on the edit page.
2230                  */
2231                 $toolarray = array(
2232                         array(
2233                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
2234                                 'id'     => 'mw-editbutton-bold',
2235                                 'open'   => '\'\'\'',
2236                                 'close'  => '\'\'\'',
2237                                 'sample' => wfMsg( 'bold_sample' ),
2238                                 'tip'    => wfMsg( 'bold_tip' ),
2239                                 'key'    => 'B'
2240                         ),
2241                         array(
2242                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
2243                                 'id'     => 'mw-editbutton-italic',
2244                                 'open'   => '\'\'',
2245                                 'close'  => '\'\'',
2246                                 'sample' => wfMsg( 'italic_sample' ),
2247                                 'tip'    => wfMsg( 'italic_tip' ),
2248                                 'key'    => 'I'
2249                         ),
2250                         array(
2251                                 'image'  => $wgLang->getImageFile( 'button-link' ),
2252                                 'id'     => 'mw-editbutton-link',
2253                                 'open'   => '[[',
2254                                 'close'  => ']]',
2255                                 'sample' => wfMsg( 'link_sample' ),
2256                                 'tip'    => wfMsg( 'link_tip' ),
2257                                 'key'    => 'L'
2258                         ),
2259                         array(
2260                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
2261                                 'id'     => 'mw-editbutton-extlink',
2262                                 'open'   => '[',
2263                                 'close'  => ']',
2264                                 'sample' => wfMsg( 'extlink_sample' ),
2265                                 'tip'    => wfMsg( 'extlink_tip' ),
2266                                 'key'    => 'X'
2267                         ),
2268                         array(
2269                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
2270                                 'id'     => 'mw-editbutton-headline',
2271                                 'open'   => "\n== ",
2272                                 'close'  => " ==\n",
2273                                 'sample' => wfMsg( 'headline_sample' ),
2274                                 'tip'    => wfMsg( 'headline_tip' ),
2275                                 'key'    => 'H'
2276                         ),
2277                         $imagesAvailable ? array(
2278                                 'image'  => $wgLang->getImageFile( 'button-image' ),
2279                                 'id'     => 'mw-editbutton-image',
2280                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
2281                                 'close'  => ']]',
2282                                 'sample' => wfMsg( 'image_sample' ),
2283                                 'tip'    => wfMsg( 'image_tip' ),
2284                                 'key'    => 'D'
2285                         ) : false,
2286                         $imagesAvailable ? array(
2287                                 'image'  => $wgLang->getImageFile( 'button-media' ),
2288                                 'id'     => 'mw-editbutton-media',
2289                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
2290                                 'close'  => ']]',
2291                                 'sample' => wfMsg( 'media_sample' ),
2292                                 'tip'    => wfMsg( 'media_tip' ),
2293                                 'key'    => 'M'
2294                         ) : false,
2295                         $wgUseTeX ?     array(
2296                                 'image'  => $wgLang->getImageFile( 'button-math' ),
2297                                 'id'     => 'mw-editbutton-math',
2298                                 'open'   => "<math>",
2299                                 'close'  => "</math>",
2300                                 'sample' => wfMsg( 'math_sample' ),
2301                                 'tip'    => wfMsg( 'math_tip' ),
2302                                 'key'    => 'C'
2303                         ) : false,
2304                         array(
2305                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
2306                                 'id'     => 'mw-editbutton-nowiki',
2307                                 'open'   => "<nowiki>",
2308                                 'close'  => "</nowiki>",
2309                                 'sample' => wfMsg( 'nowiki_sample' ),
2310                                 'tip'    => wfMsg( 'nowiki_tip' ),
2311                                 'key'    => 'N'
2312                         ),
2313                         array(
2314                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
2315                                 'id'     => 'mw-editbutton-signature',
2316                                 'open'   => '--~~~~',
2317                                 'close'  => '',
2318                                 'sample' => '',
2319                                 'tip'    => wfMsg( 'sig_tip' ),
2320                                 'key'    => 'Y'
2321                         ),
2322                         array(
2323                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
2324                                 'id'     => 'mw-editbutton-hr',
2325                                 'open'   => "\n----\n",
2326                                 'close'  => '',
2327                                 'sample' => '',
2328                                 'tip'    => wfMsg( 'hr_tip' ),
2329                                 'key'    => 'R'
2330                         )
2331                 );
2332                 $toolbar = "<div id='toolbar'>\n";
2333
2334                 $script = '';
2335                 foreach ( $toolarray as $tool ) {
2336                         if ( !$tool ) {
2337                                 continue;
2338                         }
2339
2340                         $params = array(
2341                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
2342                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
2343                                 // Older browsers show a "speedtip" type message only for ALT.
2344                                 // Ideally these should be different, realistically they
2345                                 // probably don't need to be.
2346                                 $tip = $tool['tip'],
2347                                 $open = $tool['open'],
2348                                 $close = $tool['close'],
2349                                 $sample = $tool['sample'],
2350                                 $cssId = $tool['id'],
2351                         );
2352
2353                         $paramList = implode( ',',
2354                                 array_map( array( 'Xml', 'encodeJsVar' ), $params ) );
2355                         $script .= "addButton($paramList);\n";
2356                 }
2357
2358                 $wgOut->addScript( Html::inlineScript(
2359                         "if ( window.mediaWiki ) { $script }"
2360                 ) );
2361
2362                 $toolbar .= "\n</div>";
2363
2364                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
2365
2366                 return $toolbar;
2367         }
2368
2369         /**
2370          * Returns an array of html code of the following checkboxes:
2371          * minor and watch
2372          *
2373          * @param $tabindex Current tabindex
2374          * @param $skin Skin object
2375          * @param $checked Array of checkbox => bool, where bool indicates the checked
2376          *                 status of the checkbox
2377          *
2378          * @return array
2379          */
2380         public function getCheckboxes( &$tabindex, $skin, $checked ) {
2381                 global $wgUser;
2382
2383                 $checkboxes = array();
2384
2385                 $checkboxes['minor'] = '';
2386                 $minorLabel = wfMsgExt( 'minoredit', array( 'parseinline' ) );
2387                 if ( $wgUser->isAllowed( 'minoredit' ) ) {
2388                         $attribs = array(
2389                                 'tabindex'  => ++$tabindex,
2390                                 'accesskey' => wfMsg( 'accesskey-minoredit' ),
2391                                 'id'        => 'wpMinoredit',
2392                         );
2393                         $checkboxes['minor'] =
2394                                 Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
2395                                 "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
2396                                 Xml::expandAttributes( array( 'title' => $skin->titleAttrib( 'minoredit', 'withaccess' ) ) ) .
2397                                 ">{$minorLabel}</label>";
2398                 }
2399
2400                 $watchLabel = wfMsgExt( 'watchthis', array( 'parseinline' ) );
2401                 $checkboxes['watch'] = '';
2402                 if ( $wgUser->isLoggedIn() ) {
2403                         $attribs = array(
2404                                 'tabindex'  => ++$tabindex,
2405                                 'accesskey' => wfMsg( 'accesskey-watch' ),
2406                                 'id'        => 'wpWatchthis',
2407                         );
2408                         $checkboxes['watch'] =
2409                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
2410                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
2411                                 Xml::expandAttributes( array( 'title' => $skin->titleAttrib( 'watch', 'withaccess' ) ) ) .
2412                                 ">{$watchLabel}</label>";
2413                 }
2414                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
2415                 return $checkboxes;
2416         }
2417
2418         /**
2419          * Returns an array of html code of the following buttons:
2420          * save, diff, preview and live
2421          *
2422          * @param $tabindex Current tabindex
2423          *
2424          * @return array
2425          */
2426         public function getEditButtons( &$tabindex ) {
2427                 $buttons = array();
2428
2429                 $temp = array(
2430                         'id'        => 'wpSave',
2431                         'name'      => 'wpSave',
2432                         'type'      => 'submit',
2433                         'tabindex'  => ++$tabindex,
2434                         'value'     => wfMsg( 'savearticle' ),
2435                         'accesskey' => wfMsg( 'accesskey-save' ),
2436                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
2437                 );
2438                 $buttons['save'] = Xml::element('input', $temp, '');
2439
2440                 ++$tabindex; // use the same for preview and live preview
2441                 $temp = array(
2442                         'id'        => 'wpPreview',
2443                         'name'      => 'wpPreview',
2444                         'type'      => 'submit',
2445                         'tabindex'  => $tabindex,
2446                         'value'     => wfMsg( 'showpreview' ),
2447                         'accesskey' => wfMsg( 'accesskey-preview' ),
2448                         'title'     => wfMsg( 'tooltip-preview' ) . ' [' . wfMsg( 'accesskey-preview' ) . ']',
2449                 );
2450                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
2451                 $buttons['live'] = '';
2452
2453                 $temp = array(
2454                         'id'        => 'wpDiff',
2455                         'name'      => 'wpDiff',
2456                         'type'      => 'submit',
2457                         'tabindex'  => ++$tabindex,
2458                         'value'     => wfMsg( 'showdiff' ),
2459                         'accesskey' => wfMsg( 'accesskey-diff' ),
2460                         'title'     => wfMsg( 'tooltip-diff' ) . ' [' . wfMsg( 'accesskey-diff' ) . ']',
2461                 );
2462                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
2463
2464                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
2465                 return $buttons;
2466         }
2467
2468         /**
2469          * Output preview text only. This can be sucked into the edit page
2470          * via JavaScript, and saves the server time rendering the skin as
2471          * well as theoretically being more robust on the client (doesn't
2472          * disturb the edit box's undo history, won't eat your text on
2473          * failure, etc).
2474          *
2475          * @todo This doesn't include category or interlanguage links.
2476          *       Would need to enhance it a bit, <s>maybe wrap them in XML
2477          *       or something...</s> that might also require more skin
2478          *       initialization, so check whether that's a problem.
2479          */
2480         function livePreview() {
2481                 global $wgOut;
2482                 $wgOut->disable();
2483                 header( 'Content-type: text/xml; charset=utf-8' );
2484                 header( 'Cache-control: no-cache' );
2485
2486                 $previewText = $this->getPreviewText();
2487                 #$categories = $skin->getCategoryLinks();
2488
2489                 $s =
2490                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
2491                 Xml::tags( 'livepreview', null,
2492                         Xml::element( 'preview', null, $previewText )
2493                         #.      Xml::element( 'category', null, $categories )
2494                 );
2495                 echo $s;
2496         }
2497
2498
2499         public function getCancelLink() {
2500                 global $wgUser, $wgTitle;
2501
2502                 $cancelParams = array();
2503                 if ( !$this->isConflict && $this->mArticle->getOldID() > 0 ) {
2504                         $cancelParams['oldid'] = $this->mArticle->getOldID();
2505                 }
2506
2507                 return $wgUser->getSkin()->link(
2508                         $wgTitle,
2509                         wfMsgExt( 'cancel', array( 'parseinline' ) ),
2510                         array( 'id' => 'mw-editform-cancel' ),
2511                         $cancelParams,
2512                         array( 'known', 'noclasses' )
2513                 );
2514         }
2515
2516         /**
2517          * Get a diff between the current contents of the edit box and the
2518          * version of the page we're editing from.
2519          *
2520          * If this is a section edit, we'll replace the section as for final
2521          * save and then make a comparison.
2522          */
2523         function showDiff() {
2524                 $oldtext = $this->mArticle->fetchContent();
2525                 $newtext = $this->mArticle->replaceSection(
2526                         $this->section, $this->textbox1, $this->summary, $this->edittime );
2527
2528                 wfRunHooks( 'EditPageGetDiffText', array( $this, &$newtext ) );
2529
2530                 $newtext = $this->mArticle->preSaveTransform( $newtext );
2531                 $oldtitle = wfMsgExt( 'currentrev', array( 'parseinline' ) );
2532                 $newtitle = wfMsgExt( 'yourtext', array( 'parseinline' ) );
2533                 if ( $oldtext !== false  || $newtext != '' ) {
2534                         $de = new DifferenceEngine( $this->mTitle );
2535                         $de->setText( $oldtext, $newtext );
2536                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2537                         $de->showDiffStyle();
2538                 } else {
2539                         $difftext = '';
2540                 }
2541
2542                 global $wgOut;
2543                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2544         }
2545
2546         /**
2547          * Filter an input field through a Unicode de-armoring process if it
2548          * came from an old browser with known broken Unicode editing issues.
2549          *
2550          * @param $request WebRequest
2551          * @param $field String
2552          * @return String
2553          * @private
2554          */
2555         function safeUnicodeInput( $request, $field ) {
2556                 $text = rtrim( $request->getText( $field ) );
2557                 return $request->getBool( 'safemode' )
2558                         ? $this->unmakesafe( $text )
2559                         : $text;
2560         }
2561
2562         function safeUnicodeText( $request, $text ) {
2563                 $text = rtrim( $text );
2564                 return $request->getBool( 'safemode' )
2565                         ? $this->unmakesafe( $text )
2566                         : $text;
2567         }
2568
2569         /**
2570          * Filter an output field through a Unicode armoring process if it is
2571          * going to an old browser with known broken Unicode editing issues.
2572          *
2573          * @param $text String
2574          * @return String
2575          * @private
2576          */
2577         function safeUnicodeOutput( $text ) {
2578                 global $wgContLang;
2579                 $codedText = $wgContLang->recodeForEdit( $text );
2580                 return $this->checkUnicodeCompliantBrowser()
2581                         ? $codedText
2582                         : $this->makesafe( $codedText );
2583         }
2584
2585         /**
2586          * A number of web browsers are known to corrupt non-ASCII characters
2587          * in a UTF-8 text editing environment. To protect against this,
2588          * detected browsers will be served an armored version of the text,
2589          * with non-ASCII chars converted to numeric HTML character references.
2590          *
2591          * Preexisting such character references will have a 0 added to them
2592          * to ensure that round-trips do not alter the original data.
2593          *
2594          * @param $invalue String
2595          * @return String
2596          * @private
2597          */
2598         function makesafe( $invalue ) {
2599                 // Armor existing references for reversability.
2600                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
2601
2602                 $bytesleft = 0;
2603                 $result = "";
2604                 $working = 0;
2605                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2606                         $bytevalue = ord( $invalue{$i} );
2607                         if ( $bytevalue <= 0x7F ) { //0xxx xxxx
2608                                 $result .= chr( $bytevalue );
2609                                 $bytesleft = 0;
2610                         } elseif ( $bytevalue <= 0xBF ) { //10xx xxxx
2611                                 $working = $working << 6;
2612                                 $working += ($bytevalue & 0x3F);
2613                                 $bytesleft--;
2614                                 if ( $bytesleft <= 0 ) {
2615                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
2616                                 }
2617                         } elseif ( $bytevalue <= 0xDF ) { //110x xxxx
2618                                 $working = $bytevalue & 0x1F;
2619                                 $bytesleft = 1;
2620                         } elseif ( $bytevalue <= 0xEF ) { //1110 xxxx
2621                                 $working = $bytevalue & 0x0F;
2622                                 $bytesleft = 2;
2623                         } else { //1111 0xxx
2624                                 $working = $bytevalue & 0x07;
2625                                 $bytesleft = 3;
2626                         }
2627                 }
2628                 return $result;
2629         }
2630
2631         /**
2632          * Reverse the previously applied transliteration of non-ASCII characters
2633          * back to UTF-8. Used to protect data from corruption by broken web browsers
2634          * as listed in $wgBrowserBlackList.
2635          *
2636          * @param $invalue String
2637          * @return String
2638          * @private
2639          */
2640         function unmakesafe( $invalue ) {
2641                 $result = "";
2642                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2643                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
2644                                 $i += 3;
2645                                 $hexstring = "";
2646                                 do {
2647                                         $hexstring .= $invalue{$i};
2648                                         $i++;
2649                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
2650
2651                                 // Do some sanity checks. These aren't needed for reversability,
2652                                 // but should help keep the breakage down if the editor
2653                                 // breaks one of the entities whilst editing.
2654                                 if ( (substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6) ) {
2655                                         $codepoint = hexdec($hexstring);
2656                                         $result .= codepointToUtf8( $codepoint );
2657                                 } else {
2658                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
2659                                 }
2660                         } else {
2661                                 $result .= substr( $invalue, $i, 1 );
2662                         }
2663                 }
2664                 // reverse the transform that we made for reversability reasons.
2665                 return strtr( $result, array( "&#x0" => "&#x" ) );
2666         }
2667
2668         function noCreatePermission() {
2669                 global $wgOut;
2670                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
2671                 $wgOut->addWikiMsg( 'nocreatetext' );
2672         }
2673
2674         /**
2675          * Attempt submission
2676          * @return bool false if output is done, true if the rest of the form should be displayed
2677          */
2678         function attemptSave() {
2679                 global $wgUser, $wgOut, $wgTitle;
2680
2681                 $resultDetails = false;
2682                 # Allow bots to exempt some edits from bot flagging
2683                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
2684                 $value = $this->internalAttemptSave( $resultDetails, $bot );
2685
2686                 if ( $value == self::AS_SUCCESS_UPDATE || $value == self::AS_SUCCESS_NEW_ARTICLE ) {
2687                         $this->didSave = true;
2688                 }
2689
2690                 switch ( $value ) {
2691                         case self::AS_HOOK_ERROR_EXPECTED:
2692                         case self::AS_CONTENT_TOO_BIG:
2693                         case self::AS_ARTICLE_WAS_DELETED:
2694                         case self::AS_CONFLICT_DETECTED:
2695                         case self::AS_SUMMARY_NEEDED:
2696                         case self::AS_TEXTBOX_EMPTY:
2697                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
2698                         case self::AS_END:
2699                                 return true;
2700
2701                         case self::AS_HOOK_ERROR:
2702                         case self::AS_FILTERING:
2703                                 return false;
2704
2705                         case self::AS_SUCCESS_NEW_ARTICLE:
2706                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
2707                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) );
2708                                 return false;
2709
2710                         case self::AS_SUCCESS_UPDATE:
2711                                 $extraQuery = '';
2712                                 $sectionanchor = $resultDetails['sectionanchor'];
2713
2714                                 // Give extensions a chance to modify URL query on update
2715                                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this->mArticle, &$sectionanchor, &$extraQuery ) );
2716
2717                                 if ( $resultDetails['redirect'] ) {
2718                                         if ( $extraQuery == '' ) {
2719                                                 $extraQuery = 'redirect=no';
2720                                         } else {
2721                                                 $extraQuery = 'redirect=no&' . $extraQuery;
2722                                         }
2723                                 }
2724                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
2725                                 return false;
2726
2727                         case self::AS_SPAM_ERROR:
2728                                 $this->spamPageWithContent( $resultDetails['spam'] );
2729                                 return false;
2730
2731                         case self::AS_BLOCKED_PAGE_FOR_USER:
2732                                 $this->blockedPage();
2733                                 return false;
2734
2735                         case self::AS_IMAGE_REDIRECT_ANON:
2736                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
2737                                 return false;
2738
2739                         case self::AS_READ_ONLY_PAGE_ANON:
2740                                 $this->userNotLoggedInPage();
2741                                 return false;
2742
2743                         case self::AS_READ_ONLY_PAGE_LOGGED:
2744                         case self::AS_READ_ONLY_PAGE:
2745                                 $wgOut->readOnlyPage();
2746                                 return false;
2747
2748                         case self::AS_RATE_LIMITED:
2749                                 $wgOut->rateLimited();
2750                                 return false;
2751
2752                         case self::AS_NO_CREATE_PERMISSION:
2753                                 $this->noCreatePermission();
2754                                 return;
2755
2756                         case self::AS_BLANK_ARTICLE:
2757                                 $wgOut->redirect( $wgTitle->getFullURL() );
2758                                 return false;
2759
2760                         case self::AS_IMAGE_REDIRECT_LOGGED:
2761                                 $wgOut->permissionRequired( 'upload' );
2762                                 return false;
2763                 }
2764         }
2765
2766         function getBaseRevision() {
2767                 if ( !$this->mBaseRevision ) {
2768                         $db = wfGetDB( DB_MASTER );
2769                         $baseRevision = Revision::loadFromTimestamp(
2770                                 $db, $this->mTitle, $this->edittime );
2771                         return $this->mBaseRevision = $baseRevision;
2772                 } else {
2773                         return $this->mBaseRevision;
2774                 }
2775         }
2776 }