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 object 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          * @param $request WebRequest
 660          */
 661         protected function importContentFormData( &$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\n</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\n</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 ( $wgUser->isLoggedIn() ) {
 726                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
 727                         } else {
 728                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
 729                         }
 730                 }
 731                 # Give a notice if the user is editing a deleted/moved page...
 732                 if ( !$this->mTitle->exists() ) {
 733                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle->getPrefixedText(),
 734                                 '', array( 'lim' => 10,
 735                                            'conds' => array( "log_action != 'revision'" ),
 736                                            'showIfEmpty' => false,
 737                                            'msgKey' => array( 'recreate-moveddeleted-warn') )
 738                         );
 739                 }
 740         }
 741
 742         /**
 743          * Attempt to show a custom editing introduction, if supplied
 744          *
 745          * @return bool
 746          */
 747         protected function showCustomIntro() {
 748                 if ( $this->editintro ) {
 749                         $title = Title::newFromText( $this->editintro );
 750                         if ( $title instanceof Title && $title->exists() && $title->userCanRead() ) {
 751                                 global $wgOut;
 752                                 $revision = Revision::newFromTitle( $title );
 753                                 $wgOut->addWikiTextTitleTidy( $revision->getText(), $this->mTitle );
 754                                 return true;
 755                         } else {
 756                                 return false;
 757                         }
 758                 } else {
 759                         return false;
 760                 }
 761         }
 762
 763         /**
 764          * Attempt submission (no UI)
 765          * @return one of the constants describing the result
 766          */
 767         function internalAttemptSave( &$result, $bot = false ) {
 768                 global $wgFilterCallback, $wgUser, $wgOut, $wgParser;
 769                 global $wgMaxArticleSize;
 770
 771                 wfProfileIn( __METHOD__  );
 772                 wfProfileIn( __METHOD__ . '-checks' );
 773
 774                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
 775                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
 776                         return self::AS_HOOK_ERROR;
 777                 }
 778
 779                 # Check image redirect
 780                 if ( $this->mTitle->getNamespace() == NS_FILE &&
 781                         Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
 782                         !$wgUser->isAllowed( 'upload' ) ) {
 783                                 if ( $wgUser->isAnon() ) {
 784                                         return self::AS_IMAGE_REDIRECT_ANON;
 785                                 } else {
 786                                         return self::AS_IMAGE_REDIRECT_LOGGED;
 787                                 }
 788                 }
 789
 790                 # Check for spam
 791                 $match = self::matchSummarySpamRegex( $this->summary );
 792                 if ( $match === false ) {
 793                         $match = self::matchSpamRegex( $this->textbox1 );
 794                 }
 795                 if ( $match !== false ) {
 796                         $result['spam'] = $match;
 797                         $ip = wfGetIP();
 798                         $pdbk = $this->mTitle->getPrefixedDBkey();
 799                         $match = str_replace( "\n", '', $match );
 800                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
 801                         wfProfileOut( __METHOD__ . '-checks' );
 802                         wfProfileOut( __METHOD__ );
 803                         return self::AS_SPAM_ERROR;
 804                 }
 805                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
 806                         # Error messages or other handling should be performed by the filter function
 807                         wfProfileOut( __METHOD__ . '-checks' );
 808                         wfProfileOut( __METHOD__ );
 809                         return self::AS_FILTERING;
 810                 }
 811                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
 812                         # Error messages etc. could be handled within the hook...
 813                         wfProfileOut( __METHOD__ . '-checks' );
 814                         wfProfileOut( __METHOD__ );
 815                         return self::AS_HOOK_ERROR;
 816                 } elseif ( $this->hookError != '' ) {
 817                         # ...or the hook could be expecting us to produce an error
 818                         wfProfileOut( __METHOD__ . '-checks' );
 819                         wfProfileOut( __METHOD__ );
 820                         return self::AS_HOOK_ERROR_EXPECTED;
 821                 }
 822                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 823                         # Check block state against master, thus 'false'.
 824                         wfProfileOut( __METHOD__ . '-checks' );
 825                         wfProfileOut( __METHOD__ );
 826                         return self::AS_BLOCKED_PAGE_FOR_USER;
 827                 }
 828                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
 829                 if ( $this->kblength > $wgMaxArticleSize ) {
 830                         // Error will be displayed by showEditForm()
 831                         $this->tooBig = true;
 832                         wfProfileOut( __METHOD__ . '-checks' );
 833                         wfProfileOut( __METHOD__ );
 834                         return self::AS_CONTENT_TOO_BIG;
 835                 }
 836
 837                 if ( !$wgUser->isAllowed( 'edit' ) ) {
 838                         if ( $wgUser->isAnon() ) {
 839                                 wfProfileOut( __METHOD__ . '-checks' );
 840                                 wfProfileOut( __METHOD__ );
 841                                 return self::AS_READ_ONLY_PAGE_ANON;
 842                         } else {
 843                                 wfProfileOut( __METHOD__ . '-checks' );
 844                                 wfProfileOut( __METHOD__ );
 845                                 return self::AS_READ_ONLY_PAGE_LOGGED;
 846                         }
 847                 }
 848
 849                 if ( wfReadOnly() ) {
 850                         wfProfileOut( __METHOD__ . '-checks' );
 851                         wfProfileOut( __METHOD__ );
 852                         return self::AS_READ_ONLY_PAGE;
 853                 }
 854                 if ( $wgUser->pingLimiter() ) {
 855                         wfProfileOut( __METHOD__ . '-checks' );
 856                         wfProfileOut( __METHOD__ );
 857                         return self::AS_RATE_LIMITED;
 858                 }
 859
 860                 # If the article has been deleted while editing, don't save it without
 861                 # confirmation
 862                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
 863                         wfProfileOut( __METHOD__ . '-checks' );
 864                         wfProfileOut( __METHOD__ );
 865                         return self::AS_ARTICLE_WAS_DELETED;
 866                 }
 867
 868                 wfProfileOut( __METHOD__ . '-checks' );
 869
 870                 # If article is new, insert it.
 871                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 872                 if ( 0 == $aid ) {
 873                         // Late check for create permission, just in case *PARANOIA*
 874                         if ( !$this->mTitle->userCan( 'create' ) ) {
 875                                 wfDebug( __METHOD__ . ": no create permission\n" );
 876                                 wfProfileOut( __METHOD__ );
 877                                 return self::AS_NO_CREATE_PERMISSION;
 878                         }
 879
 880                         # Don't save a new article if it's blank.
 881                         if ( $this->textbox1 == '' ) {
 882                                 wfProfileOut( __METHOD__ );
 883                                 return self::AS_BLANK_ARTICLE;
 884                         }
 885
 886                         // Run post-section-merge edit filter
 887                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
 888                                 # Error messages etc. could be handled within the hook...
 889                                 wfProfileOut( __METHOD__ );
 890                                 return self::AS_HOOK_ERROR;
 891                         } elseif ( $this->hookError != '' ) {
 892                                 # ...or the hook could be expecting us to produce an error
 893                                 wfProfileOut( __METHOD__ );
 894                                 return self::AS_HOOK_ERROR_EXPECTED;
 895                         }
 896
 897                         # Handle the user preference to force summaries here. Check if it's not a redirect.
 898                         if ( !$this->allowBlankSummary && !Title::newFromRedirect( $this->textbox1 ) ) {
 899                                 if ( md5( $this->summary ) == $this->autoSumm ) {
 900                                         $this->missingSummary = true;
 901                                         wfProfileOut( __METHOD__ );
 902                                         return self::AS_SUMMARY_NEEDED;
 903                                 }
 904                         }
 905
 906                         $isComment = ( $this->section == 'new' );
 907
 908                         $flags = EDIT_NEW | EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
 909                                 ( $this->minoredit ? EDIT_MINOR : 0 ) |
 910                                 ( $bot ? EDIT_FORCE_BOT : 0 );
 911                         $this->mArticle->doEdit( $this->textbox1, $this->summary, $flags,
 912                                 false, null, $this->watchthis, $isComment, '', true );
 913
 914                         wfProfileOut( __METHOD__ );
 915                         return self::AS_SUCCESS_NEW_ARTICLE;
 916                 }
 917
 918                 # Article exists. Check for edit conflict.
 919
 920                 $this->mArticle->clear(); # Force reload of dates, etc.
 921                 $this->mArticle->forUpdate( true ); # Lock the article
 922
 923                 wfDebug( "timestamp: {$this->mArticle->getTimestamp()}, edittime: {$this->edittime}\n" );
 924
 925                 if ( $this->mArticle->getTimestamp() != $this->edittime ) {
 926                         $this->isConflict = true;
 927                         if ( $this->section == 'new' ) {
 928                                 if ( $this->mArticle->getUserText() == $wgUser->getName() &&
 929                                         $this->mArticle->getComment() == $this->summary ) {
 930                                         // Probably a duplicate submission of a new comment.
 931                                         // This can happen when squid resends a request after
 932                                         // a timeout but the first one actually went through.
 933                                         wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
 934                                 } else {
 935                                         // New comment; suppress conflict.
 936                                         $this->isConflict = false;
 937                                         wfDebug( __METHOD__ .": conflict suppressed; new section\n" );
 938                                 }
 939                         }
 940                 }
 941                 $userid = $wgUser->getId();
 942
 943                 # Suppress edit conflict with self, except for section edits where merging is required.
 944                 if ( $this->isConflict && $this->section == '' && $this->userWasLastToEdit( $userid, $this->edittime ) ) {
 945                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
 946                         $this->isConflict = false;
 947                 }
 948
 949                 if ( $this->isConflict ) {
 950                         wfDebug( __METHOD__ . ": conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 951                                 $this->mArticle->getTimestamp() . "')\n" );
 952                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime );
 953                 } else {
 954                         wfDebug( __METHOD__ . ": getting section '$this->section'\n" );
 955                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary );
 956                 }
 957                 if ( is_null( $text ) ) {
 958                         wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
 959                         $this->isConflict = true;
 960                         $text = $this->textbox1; // do not try to merge here!
 961                 } else if ( $this->isConflict ) {
 962                         # Attempt merge
 963                         if ( $this->mergeChangesInto( $text ) ) {
 964                                 // Successful merge! Maybe we should tell the user the good news?
 965                                 $this->isConflict = false;
 966                                 wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
 967                         } else {
 968                                 $this->section = '';
 969                                 $this->textbox1 = $text;
 970                                 wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
 971                         }
 972                 }
 973
 974                 if ( $this->isConflict ) {
 975                         wfProfileOut( __METHOD__ );
 976                         return self::AS_CONFLICT_DETECTED;
 977                 }
 978
 979                 $oldtext = $this->mArticle->getContent();
 980
 981                 // Run post-section-merge edit filter
 982                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError, $this->summary ) ) ) {
 983                         # Error messages etc. could be handled within the hook...
 984                         wfProfileOut( __METHOD__ );
 985                         return self::AS_HOOK_ERROR;
 986                 } elseif ( $this->hookError != '' ) {
 987                         # ...or the hook could be expecting us to produce an error
 988                         wfProfileOut( __METHOD__ );
 989                         return self::AS_HOOK_ERROR_EXPECTED;
 990                 }
 991
 992                 # Handle the user preference to force summaries here, but not for null edits
 993                 if ( $this->section != 'new' && !$this->allowBlankSummary && 0 != strcmp( $oldtext, $text )
 994                         && !Title::newFromRedirect( $text ) ) # check if it's not a redirect
 995                 {
 996                         if ( md5( $this->summary ) == $this->autoSumm ) {
 997                                 $this->missingSummary = true;
 998                                 wfProfileOut( __METHOD__ );
 999                                 return self::AS_SUMMARY_NEEDED;
1000                         }
1001                 }
1002
1003                 # And a similar thing for new sections
1004                 if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1005                         if ( trim( $this->summary ) == '' ) {
1006                                 $this->missingSummary = true;
1007                                 wfProfileOut( __METHOD__ );
1008                                 return self::AS_SUMMARY_NEEDED;
1009                         }
1010                 }
1011
1012                 # All's well
1013                 wfProfileIn( __METHOD__ . '-sectionanchor' );
1014                 $sectionanchor = '';
1015                 if ( $this->section == 'new' ) {
1016                         if ( $this->textbox1 == '' ) {
1017                                 $this->missingComment = true;
1018                                 wfProfileOut( __METHOD__ . '-sectionanchor' );
1019                                 wfProfileOut( __METHOD__ );
1020                                 return self::AS_TEXTBOX_EMPTY;
1021                         }
1022                         if ( $this->summary != '' ) {
1023                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $this->summary );
1024                                 # This is a new section, so create a link to the new section
1025                                 # in the revision summary.
1026                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
1027                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1028                         }
1029                 } elseif ( $this->section != '' ) {
1030                         # Try to get a section anchor from the section source, redirect to edited section if header found
1031                         # XXX: might be better to integrate this into Article::replaceSection
1032                         # for duplicate heading checking and maybe parsing
1033                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1034                         # we can't deal with anchors, includes, html etc in the header for now,
1035                         # headline would need to be parsed to improve this
1036                         if ( $hasmatch and strlen( $matches[2] ) > 0 ) {
1037                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $matches[2] );
1038                         }
1039                 }
1040                 wfProfileOut( __METHOD__ . '-sectionanchor' );
1041
1042                 // Save errors may fall down to the edit form, but we've now
1043                 // merged the section into full text. Clear the section field
1044                 // so that later submission of conflict forms won't try to
1045                 // replace that into a duplicated mess.
1046                 $this->textbox1 = $text;
1047                 $this->section = '';
1048
1049                 // Check for length errors again now that the section is merged in
1050                 $this->kblength = (int)( strlen( $text ) / 1024 );
1051                 if ( $this->kblength > $wgMaxArticleSize ) {
1052                         $this->tooBig = true;
1053                         wfProfileOut( __METHOD__ );
1054                         return self::AS_MAX_ARTICLE_SIZE_EXCEEDED;
1055                 }
1056
1057                 // Update the article here
1058                 $flags = EDIT_UPDATE | EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1059                         ( $this->minoredit ? EDIT_MINOR : 0 ) |
1060                         ( $bot ? EDIT_FORCE_BOT : 0 );
1061                 $status = $this->mArticle->doEdit( $text, $this->summary, $flags,
1062                         false, null, $this->watchthis, false, $sectionanchor, true );
1063
1064                 if ( $status->isOK() )
1065                 {
1066                         wfProfileOut( __METHOD__ );
1067                         return self::AS_SUCCESS_UPDATE;
1068                 } else {
1069                         $this->isConflict = true;
1070                         $result = $status->getErrorsArray();
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\n</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( null, $this->getContent() );
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\n</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\n</div>", 'missingcommenttext' );
1377                         }
1378
1379                         if ( $this->missingSummary && $this->section != 'new' ) {
1380                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
1381                         }
1382
1383                         if ( $this->missingSummary && $this->section == 'new' ) {
1384                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</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\n</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$1\n</div>\n", 'rev-deleted-text-view' );
1402                                 }
1403
1404                                 if ( !$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() ) {
1414                         if ( $this->formtype != 'preview' ) {
1415                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
1416                         } else {
1417                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
1418                         }
1419                 } else {
1420                         if ( $this->isCssJsSubpage ) {
1421                                 # Check the skin exists
1422                                 if ( !$this->isValidCssJsSubpage ) {
1423                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $wgTitle->getSkinFromCssJsSubpage() ) );
1424                                 }
1425                                 if ( $this->formtype !== 'preview' ) {
1426                                         if ( $this->isCssSubpage )
1427                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
1428                                         if ( $this->isJsSubpage )
1429                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
1430                                 }
1431                         }
1432                 }
1433
1434                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
1435                         # Is the title semi-protected?
1436                         if ( $this->mTitle->isSemiProtected() ) {
1437                                 $noticeMsg = 'semiprotectedpagewarning';
1438                         } else {
1439                                 # Then it must be protected based on static groups (regular)
1440                                 $noticeMsg = 'protectedpagewarning';
1441                         }
1442                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle->getPrefixedText(), '',
1443                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
1444                 }
1445                 if ( $this->mTitle->isCascadeProtected() ) {
1446                         # Is this page under cascading protection from some source pages?
1447                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1448                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
1449                         $cascadeSourcesCount = count( $cascadeSources );
1450                         if ( $cascadeSourcesCount > 0 ) {
1451                                 # Explain, and list the titles responsible
1452                                 foreach( $cascadeSources as $page ) {
1453                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1454                                 }
1455                         }
1456                         $notice .= '</div>';
1457                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
1458                 }
1459                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
1460                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle->getPrefixedText(), '',
1461                                 array(  'lim' => 1,
1462                                         'showIfEmpty' => false,
1463                                         'msgKey' => array( 'titleprotectedwarning' ),
1464                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
1465                 }
1466
1467                 if ( $this->kblength === false ) {
1468                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1469                 }
1470
1471                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
1472                         $wgOut->addHTML( "<div class='error' id='mw-edit-longpageerror'>\n" );
1473                         $wgOut->addWikiMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) );
1474                         $wgOut->addHTML( "</div>\n" );
1475                 } elseif ( $this->kblength > 29 ) {
1476                         $wgOut->addHTML( "<div id='mw-edit-longpagewarning'>\n" );
1477                         $wgOut->addWikiMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) );
1478                         $wgOut->addHTML( "</div>\n" );
1479                 }
1480         }
1481
1482         /**
1483          * Standard summary input and label (wgSummary), abstracted so EditPage
1484          * subclasses may reorganize the form.
1485          * Note that you do not need to worry about the label's for=, it will be
1486          * inferred by the id given to the input. You can remove them both by
1487          * passing array( 'id' => false ) to $userInputAttrs.
1488          *
1489          * @param $summary The value of the summary input
1490          * @param $labelText The html to place inside the label
1491          * @param $inputAttrs An array of attrs to use on the input
1492          * @param $spanLabelAttrs An array of attrs to use on the span inside the label
1493          *
1494          * @return array An array in the format array( $label, $input )
1495          */
1496         function getSummaryInput($summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null) {
1497                 global $wgUser;
1498                 //Note: the maxlength is overriden in JS to 250 and to make it use UTF-8 bytes, not characters.
1499                 $inputAttrs = ( is_array($inputAttrs) ? $inputAttrs : array() ) + array(
1500                         'id' => 'wpSummary',
1501                         'maxlength' => '200',
1502                         'tabindex' => '1',
1503                         'size' => 60,
1504                         'spellcheck' => 'true',
1505                 ) + $wgUser->getSkin()->tooltipAndAccessKeyAttribs( 'summary' );
1506
1507                 $spanLabelAttrs = ( is_array($spanLabelAttrs) ? $spanLabelAttrs : array() ) + array(
1508                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
1509                         'id' => "wpSummaryLabel"
1510                 );
1511
1512                 $label = null;
1513                 if ( $labelText ) {
1514                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
1515                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
1516                 }
1517
1518                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
1519
1520                 return array( $label, $input );
1521         }
1522
1523         /**
1524          * @param $isSubjectPreview Boolean: true if this is the section subject/title
1525          *                          up top, or false if this is the comment summary
1526          *                          down below the textarea
1527          * @param $summary String: The text of the summary to display
1528          * @return String
1529          */
1530         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
1531                 global $wgOut, $wgContLang;
1532                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
1533                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
1534                 if ( $isSubjectPreview ) {
1535                         if ( $this->nosummary )
1536                                 return;
1537                 } else {
1538                         if ( !$this->mShowSummaryField )
1539                                 return;
1540                 }
1541                 $summary = $wgContLang->recodeForEdit( $summary );
1542                 $labelText = wfMsgExt( $isSubjectPreview ? 'subject' : 'summary', 'parseinline' );
1543                 list($label, $input) = $this->getSummaryInput($summary, $labelText, array( 'class' => $summaryClass ), array());
1544                 $wgOut->addHTML("{$label} {$input}");
1545         }
1546
1547         /**
1548          * @param $isSubjectPreview Boolean: true if this is the section subject/title
1549          *                          up top, or false if this is the comment summary
1550          *                          down below the textarea
1551          * @param $summary String: the text of the summary to display
1552          * @return String
1553          */
1554         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
1555                 if ( !$summary || ( !$this->preview && !$this->diff ) )
1556                         return "";
1557
1558                 global $wgParser, $wgUser;
1559                 $sk = $wgUser->getSkin();
1560
1561                 if ( $isSubjectPreview )
1562                         $summary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $summary ) );
1563
1564                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
1565
1566                 $summary = wfMsgExt( $message, 'parseinline' ) . $sk->commentBlock( $summary, $this->mTitle, $isSubjectPreview );
1567                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
1568         }
1569
1570         protected function showFormBeforeText() {
1571                 global $wgOut;
1572                 $section = htmlspecialchars( $this->section );
1573                 $wgOut->addHTML( <<<INPUTS
1574 <input type='hidden' value="{$section}" name="wpSection" />
1575 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
1576 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
1577 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
1578
1579 INPUTS
1580                 );
1581                 if ( !$this->checkUnicodeCompliantBrowser() )
1582                         $wgOut->addHTML(Xml::hidden( 'safemode', '1' ));
1583         }
1584
1585         protected function showFormAfterText() {
1586                 global $wgOut, $wgUser;
1587                 /**
1588                  * To make it harder for someone to slip a user a page
1589                  * which submits an edit form to the wiki without their
1590                  * knowledge, a random token is associated with the login
1591                  * session. If it's not passed back with the submission,
1592                  * we won't save the page, or render user JavaScript and
1593                  * CSS previews.
1594                  *
1595                  * For anon editors, who may not have a session, we just
1596                  * include the constant suffix to prevent editing from
1597                  * broken text-mangling proxies.
1598                  */
1599                 $wgOut->addHTML( "\n" . Xml::hidden( "wpEditToken", $wgUser->editToken() ) . "\n" );
1600         }
1601
1602         /**
1603          * Subpage overridable method for printing the form for page content editing
1604          * By default this simply outputs wpTextbox1
1605          * Subclasses can override this to provide a custom UI for editing;
1606          * be it a form, or simply wpTextbox1 with a modified content that will be
1607          * reverse modified when extracted from the post data.
1608          * Note that this is basically the inverse for importContentFormData
1609          *
1610          * @param $request WebRequest
1611          */
1612         protected function showContentForm() {
1613                 $this->showTextbox1();
1614         }
1615
1616         /**
1617          * Method to output wpTextbox1
1618          * The $textoverride method can be used by subclasses overriding showContentForm
1619          * to pass back to this method.
1620          *
1621          * @param $customAttribs An array of html attributes to use in the textarea
1622          * @param $textoverride String: optional text to override $this->textarea1 with
1623          */
1624         protected function showTextbox1($customAttribs = null, $textoverride = null) {
1625                 $classes = array(); // Textarea CSS
1626                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
1627                         # Is the title semi-protected?
1628                         if ( $this->mTitle->isSemiProtected() ) {
1629                                 $classes[] = 'mw-textarea-sprotected';
1630                         } else {
1631                                 # Then it must be protected based on static groups (regular)
1632                                 $classes[] = 'mw-textarea-protected';
1633                         }
1634                 }
1635                 $attribs = array( 'tabindex' => 1 );
1636                 if ( is_array($customAttribs) )
1637                         $attribs += $customAttribs;
1638
1639                 if ( $this->wasDeletedSinceLastEdit() )
1640                         $attribs['type'] = 'hidden';
1641                 if ( !empty( $classes ) ) {
1642                         if ( isset($attribs['class']) )
1643                                 $classes[] = $attribs['class'];
1644                         $attribs['class'] = implode( ' ', $classes );
1645                 }
1646
1647                 $this->showTextbox( isset($textoverride) ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
1648         }
1649
1650         protected function showTextbox2() {
1651                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6 ) );
1652         }
1653
1654         protected function showTextbox( $content, $name, $customAttribs = array() ) {
1655                 global $wgOut, $wgUser;
1656
1657                 $wikitext = $this->safeUnicodeOutput( $content );
1658                 if ( $wikitext !== '' ) {
1659                         // Ensure there's a newline at the end, otherwise adding lines
1660                         // is awkward.
1661                         // But don't add a newline if the ext is empty, or Firefox in XHTML
1662                         // mode will show an extra newline. A bit annoying.
1663                         $wikitext .= "\n";
1664                 }
1665
1666                 $attribs = $customAttribs + array(
1667                         'accesskey' => ',',
1668                         'id'   => $name,
1669                         'cols' => $wgUser->getIntOption( 'cols' ),
1670                         'rows' => $wgUser->getIntOption( 'rows' ),
1671                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
1672                 );
1673
1674                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
1675         }
1676
1677         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
1678                 global $wgOut;
1679                 $classes = array();
1680                 if ( $isOnTop )
1681                         $classes[] = 'ontop';
1682
1683                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
1684
1685                 if ( $this->formtype != 'preview' )
1686                         $attribs['style'] = 'display: none;';
1687
1688                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
1689
1690                 if ( $this->formtype == 'preview' ) {
1691                         $this->showPreview( $previewOutput );
1692                 }
1693
1694                 $wgOut->addHTML( '</div>' );
1695
1696                 if ( $this->formtype == 'diff') {
1697                         $this->showDiff();
1698                 }
1699         }
1700
1701         /**
1702          * Append preview output to $wgOut.
1703          * Includes category rendering if this is a category page.
1704          *
1705          * @param $text String: the HTML to be output for the preview.
1706          */
1707         protected function showPreview( $text ) {
1708                 global $wgOut;
1709                 if ( $this->mTitle->getNamespace() == NS_CATEGORY) {
1710                         $this->mArticle->openShowCategory();
1711                 }
1712                 # This hook seems slightly odd here, but makes things more
1713                 # consistent for extensions.
1714                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
1715                 $wgOut->addHTML( $text );
1716                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1717                         $this->mArticle->closeShowCategory();
1718                 }
1719         }
1720
1721         /**
1722          * Give a chance for site and per-namespace customizations of
1723          * terms of service summary link that might exist separately
1724          * from the copyright notice.
1725          *
1726          * This will display between the save button and the edit tools,
1727          * so should remain short!
1728          */
1729         protected function showTosSummary() {
1730                 $msg = 'editpage-tos-summary';
1731                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
1732                 $text = wfMsg( $msg );
1733                 if( !wfEmptyMsg( $msg, $text ) && $text !== '-' ) {
1734                         global $wgOut;
1735                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
1736                         $wgOut->addWikiMsgArray( $msg, array() );
1737                         $wgOut->addHTML( '</div>' );
1738                 }
1739         }
1740
1741         protected function showEditTools() {
1742                 global $wgOut;
1743                 $wgOut->addHTML( '<div class="mw-editTools">' );
1744                 $wgOut->addWikiMsgArray( 'edittools', array(), array( 'content' ) );
1745                 $wgOut->addHTML( '</div>' );
1746         }
1747
1748         protected function getCopywarn() {
1749                 global $wgRightsText;
1750                 if ( $wgRightsText ) {
1751                         $copywarnMsg = array( 'copyrightwarning',
1752                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
1753                                 $wgRightsText );
1754                 } else {
1755                         $copywarnMsg = array( 'copyrightwarning2',
1756                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
1757                 }
1758                 // Allow for site and per-namespace customization of contribution/copyright notice.
1759                 wfRunHooks( 'EditPageCopyrightWarning', array( $this->mTitle, &$copywarnMsg ) );
1760
1761                 return "<div id=\"editpage-copywarn\">\n" . call_user_func_array("wfMsgNoTrans", $copywarnMsg) . "\n</div>";
1762         }
1763
1764         protected function showStandardInputs( &$tabindex = 2 ) {
1765                 global $wgOut, $wgUser;
1766                 $wgOut->addHTML( "<div class='editOptions'>\n" );
1767
1768                 if ( $this->section != 'new' ) {
1769                         $this->showSummaryInput( false, $this->summary );
1770                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
1771                 }
1772
1773                 $checkboxes = $this->getCheckboxes( $tabindex, $wgUser->getSkin(),
1774                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
1775                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
1776                 $wgOut->addHTML( "<div class='editButtons'>\n" );
1777                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
1778
1779                 $cancel = $this->getCancelLink();
1780                 $separator = wfMsgExt( 'pipe-separator' , 'escapenoentities' );
1781                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ) );
1782                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
1783                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
1784                         htmlspecialchars( wfMsg( 'newwindow' ) );
1785                 $wgOut->addHTML( "      <span class='editHelp'>{$cancel}{$separator}{$edithelp}</span>\n" );
1786                 $wgOut->addHTML( "</div><!-- editButtons -->\n</div><!-- editOptions -->\n" );
1787         }
1788
1789         /*
1790          * Show an edit conflict. textbox1 is already shown in showEditForm().
1791          * If you want to use another entry point to this function, be careful.
1792          */
1793         protected function showConflict() {
1794                 global $wgOut;
1795                 $this->textbox2 = $this->textbox1;
1796                 $this->textbox1 = $this->getContent();
1797                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
1798                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
1799
1800                         $de = new DifferenceEngine( $this->mTitle );
1801                         $de->setText( $this->textbox2, $this->textbox1 );
1802                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1803
1804                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
1805                         $this->showTextbox2();
1806                 }
1807         }
1808
1809         protected function getLastDelete() {
1810                 $dbr = wfGetDB( DB_SLAVE );
1811                 $data = $dbr->selectRow(
1812                         array( 'logging', 'user' ),
1813                         array( 'log_type',
1814                                'log_action',
1815                                'log_timestamp',
1816                                'log_user',
1817                                'log_namespace',
1818                                'log_title',
1819                                'log_comment',
1820                                'log_params',
1821                                'log_deleted',
1822                                'user_name' ),
1823                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1824                                'log_title' => $this->mTitle->getDBkey(),
1825                                'log_type' => 'delete',
1826                                'log_action' => 'delete',
1827                                'user_id=log_user' ),
1828                         __METHOD__,
1829                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
1830                 );
1831                 // Quick paranoid permission checks...
1832                 if( is_object( $data ) ) {
1833                         if( $data->log_deleted & LogPage::DELETED_USER )
1834                                 $data->user_name = wfMsgHtml( 'rev-deleted-user' );
1835                         if( $data->log_deleted & LogPage::DELETED_COMMENT )
1836                                 $data->log_comment = wfMsgHtml( 'rev-deleted-comment' );
1837                 }
1838                 return $data;
1839         }
1840
1841         /**
1842          * Get the rendered text for previewing.
1843          * @return string
1844          */
1845         function getPreviewText() {
1846                 global $wgOut, $wgUser, $wgTitle, $wgParser, $wgLang, $wgContLang, $wgMessageCache;
1847
1848                 wfProfileIn( __METHOD__ );
1849
1850                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1851                         if ( $this->mTokenOkExceptSuffix ) {
1852                                 $note = wfMsg( 'token_suffix_mismatch' );
1853                         } else {
1854                                 $note = wfMsg( 'session_fail_preview' );
1855                         }
1856                 } else {
1857                         $note = wfMsg( 'previewnote' );
1858                 }
1859
1860                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1861                 $parserOptions->setEditSection( false );
1862                 $parserOptions->setIsPreview( true );
1863                 $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
1864
1865                 global $wgRawHtml;
1866                 if ( $wgRawHtml && !$this->mTokenOk ) {
1867                         // Could be an offsite preview attempt. This is very unsafe if
1868                         // HTML is enabled, as it could be an attack.
1869                         return $wgOut->parse( "<div class='previewnote'>" .
1870                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1871                 }
1872
1873                 # don't parse user css/js, show message about preview
1874                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1875
1876                 if ( $this->isCssJsSubpage ) {
1877                         if (preg_match( "/\\.css$/", $this->mTitle->getText() ) ) {
1878                                 $previewtext = "<div id='mw-usercsspreview'>\n" . wfMsg( 'usercsspreview' ) . "\n</div>";
1879                         } else if (preg_match( "/\\.js$/", $this->mTitle->getText() ) ) {
1880                                 $previewtext = "<div id='mw-userjspreview'>\n" . wfMsg( 'userjspreview' ) . "\n</div>";
1881                         }
1882                         $parserOptions->setTidy( true );
1883                         $parserOutput = $wgParser->parse( $previewtext, $this->mTitle, $parserOptions );
1884                         $previewHTML = $parserOutput->mText;
1885                 } elseif ( $rt = Title::newFromRedirectArray( $this->textbox1 ) ) {
1886                         $previewHTML = $this->mArticle->viewRedirect( $rt, false );
1887                 } else {
1888                         $toparse = $this->textbox1;
1889
1890                         # If we're adding a comment, we need to show the
1891                         # summary as the headline
1892                         if ( $this->section == "new" && $this->summary != "" ) {
1893                                 $toparse = "== {$this->summary} ==\n\n" . $toparse;
1894                         }
1895
1896                         wfRunHooks( 'EditPageGetPreviewText', array( $this, &$toparse ) );
1897
1898                         // Parse mediawiki messages with correct target language
1899                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1900                                 list( /* $unused */, $lang ) = $wgMessageCache->figureMessage( $this->mTitle->getText() );
1901                                 $obj = wfGetLangObj( $lang );
1902                                 $parserOptions->setTargetLanguage( $obj );
1903                         }
1904
1905
1906                         $parserOptions->setTidy( true );
1907                         $parserOptions->enableLimitReport();
1908                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ),
1909                                         $this->mTitle, $parserOptions );
1910
1911                         $previewHTML = $parserOutput->getText();
1912                         $this->mParserOutput = $parserOutput;
1913                         $wgOut->addParserOutputNoText( $parserOutput );
1914
1915                         if ( count( $parserOutput->getWarnings() ) ) {
1916                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
1917                         }
1918                 }
1919
1920                 if( $this->isConflict ) {
1921                         $conflict = '<h2 id="mw-previewconflict">' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1922                 } else {
1923                         $conflict = '<hr />';
1924                 }
1925
1926                 $previewhead = "<div class='previewnote'>\n" .
1927                         '<h2 id="mw-previewheader">' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>" .
1928                         $wgOut->parse( $note ) . $conflict . "</div>\n";
1929
1930                 wfProfileOut( __METHOD__ );
1931                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
1932         }
1933
1934         function getTemplates() {
1935                 if ( $this->preview || $this->section != '' ) {
1936                         $templates = array();
1937                         if ( !isset( $this->mParserOutput ) ) return $templates;
1938                         foreach( $this->mParserOutput->getTemplates() as $ns => $template) {
1939                                 foreach( array_keys( $template ) as $dbk ) {
1940                                         $templates[] = Title::makeTitle($ns, $dbk);
1941                                 }
1942                         }
1943                         return $templates;
1944                 } else {
1945                         return $this->mArticle->getUsedTemplates();
1946                 }
1947         }
1948
1949         /**
1950          * Call the stock "user is blocked" page
1951          */
1952         function blockedPage() {
1953                 global $wgOut;
1954                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
1955
1956                 # If the user made changes, preserve them when showing the markup
1957                 # (This happens when a user is blocked during edit, for instance)
1958                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
1959                 if ( $first ) {
1960                         $source = $this->mTitle->exists() ? $this->getContent() : false;
1961                 } else {
1962                         $source = $this->textbox1;
1963                 }
1964
1965                 # Spit out the source or the user's modified version
1966                 if ( $source !== false ) {
1967                         $wgOut->addHTML( '<hr />' );
1968                         $wgOut->addWikiMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() );
1969                         $this->showTextbox1( array( 'readonly' ), $source );
1970                 }
1971         }
1972
1973         /**
1974          * Produce the stock "please login to edit pages" page
1975          */
1976         function userNotLoggedInPage() {
1977                 global $wgUser, $wgOut, $wgTitle;
1978                 $skin = $wgUser->getSkin();
1979
1980                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1981                 $loginLink = $skin->link(
1982                         $loginTitle,
1983                         wfMsgHtml( 'loginreqlink' ),
1984                         array(),
1985                         array( 'returnto' => $wgTitle->getPrefixedText() ),
1986                         array( 'known', 'noclasses' )
1987                 );
1988
1989                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1990                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1991                 $wgOut->setArticleRelated( false );
1992
1993                 $wgOut->addHTML( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
1994                 $wgOut->returnToMain( false, $wgTitle );
1995         }
1996
1997         /**
1998          * Creates a basic error page which informs the user that
1999          * they have attempted to edit a nonexistent section.
2000          */
2001         function noSuchSectionPage() {
2002                 global $wgOut;
2003
2004                 $wgOut->setPageTitle( wfMsg( 'nosuchsectiontitle' ) );
2005                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2006                 $wgOut->setArticleRelated( false );
2007
2008                 $res = wfMsgExt( 'nosuchsectiontext', 'parse', $this->section );
2009                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
2010                 $wgOut->addHTML( $res );
2011
2012                 $wgOut->returnToMain( false, $this->mTitle );
2013         }
2014
2015         /**
2016          * Produce the stock "your edit contains spam" page
2017          *
2018          * @param $match Text which triggered one or more filters
2019          */
2020         function spamPage( $match = false ) {
2021                 global $wgOut, $wgTitle;
2022
2023                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
2024                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2025                 $wgOut->setArticleRelated( false );
2026
2027                 $wgOut->addHTML( '<div id="spamprotected">' );
2028                 $wgOut->addWikiMsg( 'spamprotectiontext' );
2029                 if ( $match )
2030                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
2031                 $wgOut->addHTML( '</div>' );
2032
2033                 $wgOut->returnToMain( false, $wgTitle );
2034         }
2035
2036         /**
2037          * @private
2038          * @todo document
2039          */
2040         function mergeChangesInto( &$editText ){
2041                 wfProfileIn( __METHOD__ );
2042
2043                 $db = wfGetDB( DB_MASTER );
2044
2045                 // This is the revision the editor started from
2046                 $baseRevision = $this->getBaseRevision();
2047                 if ( is_null( $baseRevision ) ) {
2048                         wfProfileOut( __METHOD__ );
2049                         return false;
2050                 }
2051                 $baseText = $baseRevision->getText();
2052
2053                 // The current state, we want to merge updates into it
2054                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2055                 if ( is_null( $currentRevision ) ) {
2056                         wfProfileOut( __METHOD__ );
2057                         return false;
2058                 }
2059                 $currentText = $currentRevision->getText();
2060
2061                 $result = '';
2062                 if ( wfMerge( $baseText, $editText, $currentText, $result ) ) {
2063                         $editText = $result;
2064                         wfProfileOut( __METHOD__ );
2065                         return true;
2066                 } else {
2067                         wfProfileOut( __METHOD__ );
2068                         return false;
2069                 }
2070         }
2071
2072         /**
2073          * Check if the browser is on a blacklist of user-agents known to
2074          * mangle UTF-8 data on form submission. Returns true if Unicode
2075          * should make it through, false if it's known to be a problem.
2076          * @return bool
2077          * @private
2078          */
2079         function checkUnicodeCompliantBrowser() {
2080                 global $wgBrowserBlackList;
2081                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
2082                         // No User-Agent header sent? Trust it by default...
2083                         return true;
2084                 }
2085                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
2086                 foreach ( $wgBrowserBlackList as $browser ) {
2087                         if ( preg_match($browser, $currentbrowser) ) {
2088                                 return false;
2089                         }
2090                 }
2091                 return true;
2092         }
2093
2094         /**
2095          * @deprecated use $wgParser->stripSectionName()
2096          */
2097         function pseudoParseSectionAnchor( $text ) {
2098                 global $wgParser;
2099                 return $wgParser->stripSectionName( $text );
2100         }
2101
2102         /**
2103          * Format an anchor fragment as it would appear for a given section name
2104          * @param $text String
2105          * @return String
2106          * @private
2107          */
2108         function sectionAnchor( $text ) {
2109                 global $wgParser;
2110                 return $wgParser->guessSectionNameFromWikiText( $text );
2111         }
2112
2113         /**
2114          * Shows a bulletin board style toolbar for common editing functions.
2115          * It can be disabled in the user preferences.
2116          * The necessary JavaScript code can be found in skins/common/edit.js.
2117          *
2118          * @return string
2119          */
2120         static function getEditToolbar() {
2121                 global $wgStylePath, $wgContLang, $wgLang;
2122
2123                 /**
2124
2125                  * toolarray an array of arrays which each include the filename of
2126                  * the button image (without path), the opening tag, the closing tag,
2127                  * and optionally a sample text that is inserted between the two when no
2128                  * selection is highlighted.
2129                  * The tip text is shown when the user moves the mouse over the button.
2130                  *
2131                  * Already here are accesskeys (key), which are not used yet until someone
2132                  * can figure out a way to make them work in IE. However, we should make
2133                  * sure these keys are not defined on the edit page.
2134                  */
2135                 $toolarray = array(
2136                         array(
2137                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
2138                                 'id'     => 'mw-editbutton-bold',
2139                                 'open'   => '\'\'\'',
2140                                 'close'  => '\'\'\'',
2141                                 'sample' => wfMsg( 'bold_sample' ),
2142                                 'tip'    => wfMsg( 'bold_tip' ),
2143                                 'key'    => 'B'
2144                         ),
2145                         array(
2146                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
2147                                 'id'     => 'mw-editbutton-italic',
2148                                 'open'   => '\'\'',
2149                                 'close'  => '\'\'',
2150                                 'sample' => wfMsg( 'italic_sample' ),
2151                                 'tip'    => wfMsg( 'italic_tip' ),
2152                                 'key'    => 'I'
2153                         ),
2154                         array(
2155                                 'image'  => $wgLang->getImageFile( 'button-link' ),
2156                                 'id'     => 'mw-editbutton-link',
2157                                 'open'   => '[[',
2158                                 'close'  => ']]',
2159                                 'sample' => wfMsg( 'link_sample' ),
2160                                 'tip'    => wfMsg( 'link_tip' ),
2161                                 'key'    => 'L'
2162                         ),
2163                         array(
2164                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
2165                                 'id'     => 'mw-editbutton-extlink',
2166                                 'open'   => '[',
2167                                 'close'  => ']',
2168                                 'sample' => wfMsg( 'extlink_sample' ),
2169                                 'tip'    => wfMsg( 'extlink_tip' ),
2170                                 'key'    => 'X'
2171                         ),
2172                         array(
2173                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
2174                                 'id'     => 'mw-editbutton-headline',
2175                                 'open'   => "\n== ",
2176                                 'close'  => " ==\n",
2177                                 'sample' => wfMsg( 'headline_sample' ),
2178                                 'tip'    => wfMsg( 'headline_tip' ),
2179                                 'key'    => 'H'
2180                         ),
2181                         array(
2182                                 'image'  => $wgLang->getImageFile( 'button-image' ),
2183                                 'id'     => 'mw-editbutton-image',
2184                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
2185                                 'close'  => ']]',
2186                                 'sample' => wfMsg( 'image_sample' ),
2187                                 'tip'    => wfMsg( 'image_tip' ),
2188                                 'key'    => 'D'
2189                         ),
2190                         array(
2191                                 'image'  => $wgLang->getImageFile( 'button-media' ),
2192                                 'id'     => 'mw-editbutton-media',
2193                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
2194                                 'close'  => ']]',
2195                                 'sample' => wfMsg( 'media_sample' ),
2196                                 'tip'    => wfMsg( 'media_tip' ),
2197                                 'key'    => 'M'
2198                         ),
2199                         array(
2200                                 'image'  => $wgLang->getImageFile( 'button-math' ),
2201                                 'id'     => 'mw-editbutton-math',
2202                                 'open'   => "<math>",
2203                                 'close'  => "</math>",
2204                                 'sample' => wfMsg( 'math_sample' ),
2205                                 'tip'    => wfMsg( 'math_tip' ),
2206                                 'key'    => 'C'
2207                         ),
2208                         array(
2209                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
2210                                 'id'     => 'mw-editbutton-nowiki',
2211                                 'open'   => "<nowiki>",
2212                                 'close'  => "</nowiki>",
2213                                 'sample' => wfMsg( 'nowiki_sample' ),
2214                                 'tip'    => wfMsg( 'nowiki_tip' ),
2215                                 'key'    => 'N'
2216                         ),
2217                         array(
2218                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
2219                                 'id'     => 'mw-editbutton-signature',
2220                                 'open'   => '--~~~~',
2221                                 'close'  => '',
2222                                 'sample' => '',
2223                                 'tip'    => wfMsg( 'sig_tip' ),
2224                                 'key'    => 'Y'
2225                         ),
2226                         array(
2227                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
2228                                 'id'     => 'mw-editbutton-hr',
2229                                 'open'   => "\n----\n",
2230                                 'close'  => '',
2231                                 'sample' => '',
2232                                 'tip'    => wfMsg( 'hr_tip' ),
2233                                 'key'    => 'R'
2234                         )
2235                 );
2236                 $toolbar = "<div id='toolbar'>\n";
2237
2238                 $script = '';
2239                 foreach ( $toolarray as $tool ) {
2240                         $params = array(
2241                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
2242                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
2243                                 // Older browsers show a "speedtip" type message only for ALT.
2244                                 // Ideally these should be different, realistically they
2245                                 // probably don't need to be.
2246                                 $tip = $tool['tip'],
2247                                 $open = $tool['open'],
2248                                 $close = $tool['close'],
2249                                 $sample = $tool['sample'],
2250                                 $cssId = $tool['id'],
2251                         );
2252
2253                         $paramList = implode( ',',
2254                                 array_map( array( 'Xml', 'encodeJsVar' ), $params ) );
2255                         $script .= "addButton($paramList);\n";
2256                 }
2257                 $toolbar .= Html::inlineScript( "\n$script\n" );
2258
2259                 $toolbar .= "\n</div>";
2260
2261                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
2262
2263                 return $toolbar;
2264         }
2265
2266         /**
2267          * Returns an array of html code of the following checkboxes:
2268          * minor and watch
2269          *
2270          * @param $tabindex Current tabindex
2271          * @param $skin Skin object
2272          * @param $checked Array of checkbox => bool, where bool indicates the checked
2273          *                 status of the checkbox
2274          *
2275          * @return array
2276          */
2277         public function getCheckboxes( &$tabindex, $skin, $checked ) {
2278                 global $wgUser;
2279
2280                 $checkboxes = array();
2281
2282                 $checkboxes['minor'] = '';
2283                 $minorLabel = wfMsgExt( 'minoredit', array( 'parseinline' ) );
2284                 if ( $wgUser->isAllowed( 'minoredit' ) ) {
2285                         $attribs = array(
2286                                 'tabindex'  => ++$tabindex,
2287                                 'accesskey' => wfMsg( 'accesskey-minoredit' ),
2288                                 'id'        => 'wpMinoredit',
2289                         );
2290                         $checkboxes['minor'] =
2291                                 Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
2292                                 "&#160;<label for='wpMinoredit'" . $skin->tooltip( 'minoredit', 'withaccess' ) . ">{$minorLabel}</label>";
2293                 }
2294
2295                 $watchLabel = wfMsgExt( 'watchthis', array( 'parseinline' ) );
2296                 $checkboxes['watch'] = '';
2297                 if ( $wgUser->isLoggedIn() ) {
2298                         $attribs = array(
2299                                 'tabindex'  => ++$tabindex,
2300                                 'accesskey' => wfMsg( 'accesskey-watch' ),
2301                                 'id'        => 'wpWatchthis',
2302                         );
2303                         $checkboxes['watch'] =
2304                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
2305                                 "&#160;<label for='wpWatchthis'" . $skin->tooltip( 'watch', 'withaccess' ) . ">{$watchLabel}</label>";
2306                 }
2307                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
2308                 return $checkboxes;
2309         }
2310
2311         /**
2312          * Returns an array of html code of the following buttons:
2313          * save, diff, preview and live
2314          *
2315          * @param $tabindex Current tabindex
2316          *
2317          * @return array
2318          */
2319         public function getEditButtons(&$tabindex) {
2320                 $buttons = array();
2321
2322                 $temp = array(
2323                         'id'        => 'wpSave',
2324                         'name'      => 'wpSave',
2325                         'type'      => 'submit',
2326                         'tabindex'  => ++$tabindex,
2327                         'value'     => wfMsg( 'savearticle' ),
2328                         'accesskey' => wfMsg( 'accesskey-save' ),
2329                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
2330                 );
2331                 $buttons['save'] = Xml::element('input', $temp, '');
2332
2333                 ++$tabindex; // use the same for preview and live preview
2334                 $temp = array(
2335                         'id'        => 'wpPreview',
2336                         'name'      => 'wpPreview',
2337                         'type'      => 'submit',
2338                         'tabindex'  => $tabindex,
2339                         'value'     => wfMsg( 'showpreview' ),
2340                         'accesskey' => wfMsg( 'accesskey-preview' ),
2341                         'title'     => wfMsg( 'tooltip-preview' ) . ' [' . wfMsg( 'accesskey-preview' ) . ']',
2342                 );
2343                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
2344                 $buttons['live'] = '';
2345
2346                 $temp = array(
2347                         'id'        => 'wpDiff',
2348                         'name'      => 'wpDiff',
2349                         'type'      => 'submit',
2350                         'tabindex'  => ++$tabindex,
2351                         'value'     => wfMsg( 'showdiff' ),
2352                         'accesskey' => wfMsg( 'accesskey-diff' ),
2353                         'title'     => wfMsg( 'tooltip-diff' ) . ' [' . wfMsg( 'accesskey-diff' ) . ']',
2354                 );
2355                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
2356
2357                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
2358                 return $buttons;
2359         }
2360
2361         /**
2362          * Output preview text only. This can be sucked into the edit page
2363          * via JavaScript, and saves the server time rendering the skin as
2364          * well as theoretically being more robust on the client (doesn't
2365          * disturb the edit box's undo history, won't eat your text on
2366          * failure, etc).
2367          *
2368          * @todo This doesn't include category or interlanguage links.
2369          *       Would need to enhance it a bit, <s>maybe wrap them in XML
2370          *       or something...</s> that might also require more skin
2371          *       initialization, so check whether that's a problem.
2372          */
2373         function livePreview() {
2374                 global $wgOut;
2375                 $wgOut->disable();
2376                 header( 'Content-type: text/xml; charset=utf-8' );
2377                 header( 'Cache-control: no-cache' );
2378
2379                 $previewText = $this->getPreviewText();
2380                 #$categories = $skin->getCategoryLinks();
2381
2382                 $s =
2383                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
2384                 Xml::tags( 'livepreview', null,
2385                         Xml::element( 'preview', null, $previewText )
2386                         #.      Xml::element( 'category', null, $categories )
2387                 );
2388                 echo $s;
2389         }
2390
2391
2392         public function getCancelLink() {
2393                 global $wgUser, $wgTitle;
2394
2395                 $cancelParams = array();
2396                 if ( !$this->isConflict && $this->mArticle->getOldID() > 0 ) {
2397                         $cancelParams['oldid'] = $this->mArticle->getOldID();
2398                 }
2399
2400                 return $wgUser->getSkin()->link(
2401                         $wgTitle,
2402                         wfMsgExt( 'cancel', array( 'parseinline' ) ),
2403                         array( 'id' => 'mw-editform-cancel' ),
2404                         $cancelParams,
2405                         array( 'known', 'noclasses' )
2406                 );
2407         }
2408
2409         /**
2410          * Get a diff between the current contents of the edit box and the
2411          * version of the page we're editing from.
2412          *
2413          * If this is a section edit, we'll replace the section as for final
2414          * save and then make a comparison.
2415          */
2416         function showDiff() {
2417                 $oldtext = $this->mArticle->fetchContent();
2418                 $newtext = $this->mArticle->replaceSection(
2419                         $this->section, $this->textbox1, $this->summary, $this->edittime );
2420
2421                 wfRunHooks( 'EditPageGetDiffText', array( $this, &$newtext ) );
2422
2423                 $newtext = $this->mArticle->preSaveTransform( $newtext );
2424                 $oldtitle = wfMsgExt( 'currentrev', array( 'parseinline' ) );
2425                 $newtitle = wfMsgExt( 'yourtext', array( 'parseinline' ) );
2426                 if ( $oldtext !== false  || $newtext != '' ) {
2427                         $de = new DifferenceEngine( $this->mTitle );
2428                         $de->setText( $oldtext, $newtext );
2429                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2430                         $de->showDiffStyle();
2431                 } else {
2432                         $difftext = '';
2433                 }
2434
2435                 global $wgOut;
2436                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2437         }
2438
2439         /**
2440          * Filter an input field through a Unicode de-armoring process if it
2441          * came from an old browser with known broken Unicode editing issues.
2442          *
2443          * @param $request WebRequest
2444          * @param $field String
2445          * @return String
2446          * @private
2447          */
2448         function safeUnicodeInput( $request, $field ) {
2449                 $text = rtrim( $request->getText( $field ) );
2450                 return $request->getBool( 'safemode' )
2451                         ? $this->unmakesafe( $text )
2452                         : $text;
2453         }
2454
2455         function safeUnicodeText( $request, $text ) {
2456                 $text = rtrim( $text );
2457                 return $request->getBool( 'safemode' )
2458                         ? $this->unmakesafe( $text )
2459                         : $text;
2460         }
2461
2462         /**
2463          * Filter an output field through a Unicode armoring process if it is
2464          * going to an old browser with known broken Unicode editing issues.
2465          *
2466          * @param $text String
2467          * @return String
2468          * @private
2469          */
2470         function safeUnicodeOutput( $text ) {
2471                 global $wgContLang;
2472                 $codedText = $wgContLang->recodeForEdit( $text );
2473                 return $this->checkUnicodeCompliantBrowser()
2474                         ? $codedText
2475                         : $this->makesafe( $codedText );
2476         }
2477
2478         /**
2479          * A number of web browsers are known to corrupt non-ASCII characters
2480          * in a UTF-8 text editing environment. To protect against this,
2481          * detected browsers will be served an armored version of the text,
2482          * with non-ASCII chars converted to numeric HTML character references.
2483          *
2484          * Preexisting such character references will have a 0 added to them
2485          * to ensure that round-trips do not alter the original data.
2486          *
2487          * @param $invalue String
2488          * @return String
2489          * @private
2490          */
2491         function makesafe( $invalue ) {
2492                 // Armor existing references for reversability.
2493                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
2494
2495                 $bytesleft = 0;
2496                 $result = "";
2497                 $working = 0;
2498                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2499                         $bytevalue = ord( $invalue{$i} );
2500                         if ( $bytevalue <= 0x7F ) { //0xxx xxxx
2501                                 $result .= chr( $bytevalue );
2502                                 $bytesleft = 0;
2503                         } elseif ( $bytevalue <= 0xBF ) { //10xx xxxx
2504                                 $working = $working << 6;
2505                                 $working += ($bytevalue & 0x3F);
2506                                 $bytesleft--;
2507                                 if ( $bytesleft <= 0 ) {
2508                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
2509                                 }
2510                         } elseif ( $bytevalue <= 0xDF ) { //110x xxxx
2511                                 $working = $bytevalue & 0x1F;
2512                                 $bytesleft = 1;
2513                         } elseif ( $bytevalue <= 0xEF ) { //1110 xxxx
2514                                 $working = $bytevalue & 0x0F;
2515                                 $bytesleft = 2;
2516                         } else { //1111 0xxx
2517                                 $working = $bytevalue & 0x07;
2518                                 $bytesleft = 3;
2519                         }
2520                 }
2521                 return $result;
2522         }
2523
2524         /**
2525          * Reverse the previously applied transliteration of non-ASCII characters
2526          * back to UTF-8. Used to protect data from corruption by broken web browsers
2527          * as listed in $wgBrowserBlackList.
2528          *
2529          * @param $invalue String
2530          * @return String
2531          * @private
2532          */
2533         function unmakesafe( $invalue ) {
2534                 $result = "";
2535                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2536                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
2537                                 $i += 3;
2538                                 $hexstring = "";
2539                                 do {
2540                                         $hexstring .= $invalue{$i};
2541                                         $i++;
2542                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
2543
2544                                 // Do some sanity checks. These aren't needed for reversability,
2545                                 // but should help keep the breakage down if the editor
2546                                 // breaks one of the entities whilst editing.
2547                                 if ( (substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6) ) {
2548                                         $codepoint = hexdec($hexstring);
2549                                         $result .= codepointToUtf8( $codepoint );
2550                                 } else {
2551                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
2552                                 }
2553                         } else {
2554                                 $result .= substr( $invalue, $i, 1 );
2555                         }
2556                 }
2557                 // reverse the transform that we made for reversability reasons.
2558                 return strtr( $result, array( "&#x0" => "&#x" ) );
2559         }
2560
2561         function noCreatePermission() {
2562                 global $wgOut;
2563                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
2564                 $wgOut->addWikiMsg( 'nocreatetext' );
2565         }
2566
2567         /**
2568          * Attempt submission
2569          * @return bool false if output is done, true if the rest of the form should be displayed
2570          */
2571         function attemptSave() {
2572                 global $wgUser, $wgOut, $wgTitle;
2573
2574                 $resultDetails = false;
2575                 # Allow bots to exempt some edits from bot flagging
2576                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
2577                 $value = $this->internalAttemptSave( $resultDetails, $bot );
2578
2579                 if ( $value == self::AS_SUCCESS_UPDATE || $value == self::AS_SUCCESS_NEW_ARTICLE ) {
2580                         $this->didSave = true;
2581                 }
2582
2583                 switch ( $value ) {
2584                         case self::AS_HOOK_ERROR_EXPECTED:
2585                         case self::AS_CONTENT_TOO_BIG:
2586                         case self::AS_ARTICLE_WAS_DELETED:
2587                         case self::AS_CONFLICT_DETECTED:
2588                         case self::AS_SUMMARY_NEEDED:
2589                         case self::AS_TEXTBOX_EMPTY:
2590                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
2591                         case self::AS_END:
2592                                 return true;
2593
2594                         case self::AS_HOOK_ERROR:
2595                         case self::AS_FILTERING:
2596                         case self::AS_SUCCESS_NEW_ARTICLE:
2597                         case self::AS_SUCCESS_UPDATE:
2598                                 return false;
2599
2600                         case self::AS_SPAM_ERROR:
2601                                 $this->spamPage( $resultDetails['spam'] );
2602                                 return false;
2603
2604                         case self::AS_BLOCKED_PAGE_FOR_USER:
2605                                 $this->blockedPage();
2606                                 return false;
2607
2608                         case self::AS_IMAGE_REDIRECT_ANON:
2609                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
2610                                 return false;
2611
2612                         case self::AS_READ_ONLY_PAGE_ANON:
2613                                 $this->userNotLoggedInPage();
2614                                 return false;
2615
2616                         case self::AS_READ_ONLY_PAGE_LOGGED:
2617                         case self::AS_READ_ONLY_PAGE:
2618                                 $wgOut->readOnlyPage();
2619                                 return false;
2620
2621                         case self::AS_RATE_LIMITED:
2622                                 $wgOut->rateLimited();
2623                                 return false;
2624
2625                         case self::AS_NO_CREATE_PERMISSION:
2626                                 $this->noCreatePermission();
2627                                 return;
2628
2629                         case self::AS_BLANK_ARTICLE:
2630                                 $wgOut->redirect( $wgTitle->getFullURL() );
2631                                 return false;
2632
2633                         case self::AS_IMAGE_REDIRECT_LOGGED:
2634                                 $wgOut->permissionRequired( 'upload' );
2635                                 return false;
2636                 }
2637         }
2638
2639         function getBaseRevision() {
2640                 if ( !$this->mBaseRevision ) {
2641                         $db = wfGetDB( DB_MASTER );
2642                         $baseRevision = Revision::loadFromTimestamp(
2643                                 $db, $this->mTitle, $this->edittime );
2644                         return $this->mBaseRevision = $baseRevision;
2645                 } else {
2646                         return $this->mBaseRevision;
2647                 }
2648         }
2649 }