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