includes/EditPage.php

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