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