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 $mMetaData = '';
  49         var $isConflict = false;
  50         var $isCssJsSubpage = false;
  51         var $isCssSubpage = false;
  52         var $isJsSubpage = false;
  53         var $deletedSinceEdit = false;
  54         var $formtype;
  55         var $firsttime;
  56         var $lastDelete;
  57         var $mTokenOk = false;
  58         var $mTokenOkExceptSuffix = false;
  59         var $mTriedSave = false;
  60         var $tooBig = false;
  61         var $kblength = false;
  62         var $missingComment = false;
  63         var $missingSummary = false;
  64         var $allowBlankSummary = false;
  65         var $autoSumm = '';
  66         var $hookError = '';
  67         #var $mPreviewTemplates;
  68         var $mParserOutput;
  69         var $mBaseRevision = false;
  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 = '';
  75         var $edittime = '', $section = '', $starttime = '';
  76         var $oldid = 0, $editintro = '', $scrolltop = null;
  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          * @private
 124          */
 125         function getContent( $def_text = '' ) {
 126                 global $wgOut, $wgRequest, $wgParser, $wgContLang, $wgMessageCache;
 127
 128                 wfProfileIn( __METHOD__ );
 129                 # Get variables from query string :P
 130                 $section = $wgRequest->getVal( 'section' );
 131                 $preload = $wgRequest->getVal( 'preload' );
 132                 $undoafter = $wgRequest->getVal( 'undoafter' );
 133                 $undo = $wgRequest->getVal( 'undo' );
 134
 135                 $text = '';
 136                 // For message page not locally set, use the i18n message.
 137                 // For other non-existent articles, use preload text if any.
 138                 if ( !$this->mTitle->exists() ) {
 139                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 140                                 # If this is a system message, get the default text.
 141                                 list( $message, $lang ) = $wgMessageCache->figureMessage( $wgContLang->lcfirst( $this->mTitle->getText() ) );
 142                                 $wgMessageCache->loadAllMessages( $lang );
 143                                 $text = wfMsgGetKey( $message, false, $lang, false );
 144                                 if( wfEmptyMsg( $message, $text ) )
 145                                         $text = $this->getPreloadedText( $preload );
 146                         } else {
 147                                 # If requested, preload some text.
 148                                 $text = $this->getPreloadedText( $preload );
 149                         }
 150                 // For existing pages, get text based on "undo" or section parameters.
 151                 } else {
 152                         $text = $this->mArticle->getContent();
 153                         if ( $undo > 0 && $undoafter > 0 && $undo < $undoafter ) {
 154                                 # If they got undoafter and undo round the wrong way, switch them
 155                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 156                         }
 157                         if ( $undo > 0 && $undo > $undoafter ) {
 158                                 # Undoing a specific edit overrides section editing; section-editing
 159                                 # doesn't work with undoing.
 160                                 if ( $undoafter ) {
 161                                         $undorev = Revision::newFromId($undo);
 162                                         $oldrev = Revision::newFromId($undoafter);
 163                                 } else {
 164                                         $undorev = Revision::newFromId($undo);
 165                                         $oldrev = $undorev ? $undorev->getPrevious() : null;
 166                                 }
 167
 168                                 # Sanity check, make sure it's the right page,
 169                                 # the revisions exist and they were not deleted.
 170                                 # Otherwise, $text will be left as-is.
 171                                 if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 172                                         $undorev->getPage() == $oldrev->getPage() &&
 173                                         $undorev->getPage() == $this->mArticle->getID() &&
 174                                         !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 175                                         !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 176
 177                                         $undotext = $this->mArticle->getUndoText( $undorev, $oldrev );
 178                                         if ( $undotext === false ) {
 179                                                 # Warn the user that something went wrong
 180                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-failure">' . wfMsgNoTrans( 'undo-failure' ) . '</div>' );
 181                                         } else {
 182                                                 $text = $undotext;
 183                                                 # Inform the user of our success and set an automatic edit summary
 184                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="mw-undo-success">' . wfMsgNoTrans( 'undo-success' ) . '</div>' );
 185                                                 $firstrev = $oldrev->getNext();
 186                                                 # If we just undid one rev, use an autosummary
 187                                                 if ( $firstrev->mId == $undo ) {
 188                                                         $this->summary = wfMsgForContent( 'undo-summary', $undo, $undorev->getUserText() );
 189                                                         $this->undidRev = $undo;
 190                                                 }
 191                                                 $this->formtype = 'diff';
 192                                         }
 193                                 } else {
 194                                         // Failed basic sanity checks.
 195                                         // Older revisions may have been removed since the link
 196                                         // was created, or we may simply have got bogus input.
 197                                         $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-norev">' . wfMsgNoTrans( 'undo-norev' ) . '</div>' );
 198                                 }
 199                         } else if ( $section != '' ) {
 200                                 if ( $section == 'new' ) {
 201                                         $text = $this->getPreloadedText( $preload );
 202                                 } else {
 203                                         $text = $wgParser->getSection( $text, $section, $def_text );
 204                                 }
 205                         }
 206                 }
 207
 208                 wfProfileOut( __METHOD__ );
 209                 return $text;
 210         }
 211
 212         /** Use this method before edit() to preload some text into the edit box */
 213         public function setPreloadedText( $text ) {
 214                 $this->mPreloadText = $text;
 215         }
 216
 217         /**
 218          * Get the contents of a page from its title and remove includeonly tags
 219          *
 220          * @param $preload String: the title of the page.
 221          * @return string The contents of the page.
 222          */
 223         protected function getPreloadedText( $preload ) {
 224                 if ( !empty($this->mPreloadText) ) {
 225                         return $this->mPreloadText;
 226                 } elseif ( $preload === '' ) {
 227                         return '';
 228                 } else {
 229                         $preloadTitle = Title::newFromText( $preload );
 230                         if ( isset( $preloadTitle ) && $preloadTitle->userCanRead() ) {
 231                                 $rev = Revision::newFromTitle($preloadTitle);
 232                                 if ( is_object( $rev ) ) {
 233                                         $text = $rev->getText();
 234                                         // TODO FIXME: AAAAAAAAAAA, this shouldn't be implementing
 235                                         // its own mini-parser! -ævar
 236                                         $text = preg_replace( '~</?includeonly>~', '', $text );
 237                                         return $text;
 238                                 } else
 239                                         return '';
 240                         }
 241                 }
 242         }
 243
 244         /**
 245          * This is the function that extracts metadata from the article body on the first view.
 246          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
 247          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
 248          */
 249         function extractMetaDataFromArticle () {
 250                 global $wgUseMetadataEdit, $wgMetadataWhitelist, $wgContLang;
 251                 $this->mMetaData = '';
 252                 if ( !$wgUseMetadataEdit ) return;
 253                 if ( $wgMetadataWhitelist == '' ) return;
 254                 $s = '';
 255                 $t = $this->getContent();
 256
 257                 # MISSING : <nowiki> filtering
 258
 259                 # Categories and language links
 260                 $t = explode ( "\n" , $t );
 261                 $catlow = strtolower ( $wgContLang->getNsText( NS_CATEGORY ) );
 262                 $cat = $ll = array();
 263                 foreach ( $t AS $key => $x ) {
 264                         $y = trim ( strtolower ( $x ) );
 265                         while ( substr ( $y , 0 , 2 ) == '[[' ) {
 266                                 $y = explode ( ']]' , trim ( $x ) );
 267                                 $first = array_shift ( $y );
 268                                 $first = explode ( ':' , $first );
 269                                 $ns = array_shift ( $first );
 270                                 $ns = trim ( str_replace ( '[' , '' , $ns ) );
 271                                 if ( $wgContLang->getLanguageName( $ns ) || strtolower ( $ns ) == $catlow ) {
 272                                         $add = '[[' . $ns . ':' . implode ( ':' , $first ) . ']]';
 273                                         if ( strtolower ( $ns ) == $catlow ) $cat[] = $add;
 274                                         else $ll[] = $add;
 275                                         $x = implode ( ']]' , $y );
 276                                         $t[$key] = $x;
 277                                         $y = trim ( strtolower ( $x ) );
 278                                 } else {
 279                                         $x = implode ( ']]' , $y );
 280                                         $y = trim ( strtolower ( $x ) );
 281                                 }
 282                         }
 283                 }
 284                 if ( count ( $cat ) ) $s .= implode ( ' ' , $cat ) . "\n";
 285                 if ( count ( $ll ) ) $s .= implode ( ' ' , $ll ) . "\n";
 286                 $t = implode ( "\n" , $t );
 287
 288                 # Load whitelist
 289                 $sat = array () ; # stand-alone-templates; must be lowercase
 290                 $wl_title = Title::newFromText ( $wgMetadataWhitelist );
 291                 $wl_article = new Article ( $wl_title );
 292                 $wl = explode ( "\n" , $wl_article->getContent() );
 293                 foreach ( $wl AS $x ) {
 294                         $isentry = false;
 295                         $x = trim ( $x );
 296                         while ( substr ( $x , 0 , 1 ) == '*' ) {
 297                                 $isentry = true;
 298                                 $x = trim ( substr ( $x , 1 ) );
 299                         }
 300                         if ( $isentry ) {
 301                                 $sat[] = strtolower ( $x );
 302                         }
 303
 304                 }
 305
 306                 # Templates, but only some
 307                 $t = explode ( '{{' , $t );
 308                 $tl = array () ;
 309                 foreach ( $t AS $key => $x ) {
 310                         $y = explode ( '}}' , $x , 2 );
 311                         if ( count ( $y ) == 2 ) {
 312                                 $z = $y[0];
 313                                 $z = explode ( '|' , $z );
 314                                 $tn = array_shift ( $z );
 315                                 if ( in_array ( strtolower ( $tn ) , $sat ) ) {
 316                                         $tl[] = '{{' . $y[0] . '}}';
 317                                         $t[$key] = $y[1];
 318                                         $y = explode ( '}}' , $y[1] , 2 );
 319                                 }
 320                                 else $t[$key] = '{{' . $x;
 321                         }
 322                         else if ( $key != 0 ) $t[$key] = '{{' . $x;
 323                         else $t[$key] = $x;
 324                 }
 325                 if ( count ( $tl ) ) $s .= implode ( ' ' , $tl );
 326                 $t = implode ( '' , $t );
 327
 328                 $t = str_replace ( "\n\n\n" , "\n" , $t );
 329                 $this->mArticle->mContent = $t;
 330                 $this->mMetaData = $s;
 331         }
 332
 333         /*
 334          * Check if a page was deleted while the user was editing it, before submit.
 335          * Note that we rely on the logging table, which hasn't been always there,
 336          * but that doesn't matter, because this only applies to brand new
 337          * deletes.
 338          */
 339         protected function wasDeletedSinceLastEdit() {
 340                 if ( $this->deletedSinceEdit )
 341                         return true;
 342                 if ( $this->mTitle->isDeletedQuick() ) {
 343                         $this->lastDelete = $this->getLastDelete();
 344                         if ( $this->lastDelete ) {
 345                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
 346                                 if ( $deleteTime > $this->starttime ) {
 347                                         $this->deletedSinceEdit = true;
 348                                 }
 349                         }
 350                 }
 351                 return $this->deletedSinceEdit;
 352         }
 353
 354         function submit() {
 355                 $this->edit();
 356         }
 357
 358         /**
 359          * This is the function that gets called for "action=edit". It
 360          * sets up various member variables, then passes execution to
 361          * another function, usually showEditForm()
 362          *
 363          * The edit form is self-submitting, so that when things like
 364          * preview and edit conflicts occur, we get the same form back
 365          * with the extra stuff added.  Only when the final submission
 366          * is made and all is well do we actually save and redirect to
 367          * the newly-edited page.
 368          */
 369         function edit() {
 370                 global $wgOut, $wgRequest, $wgEnableJS2system;
 371                 // Allow extensions to modify/prevent this form or submission
 372                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 373                         return;
 374                 }
 375
 376                 wfProfileIn( __METHOD__ );
 377                 wfDebug( __METHOD__.": enter\n" );
 378
 379                 // This is not an article
 380                 $wgOut->setArticleFlag( false );
 381
 382                 $this->importFormData( $wgRequest );
 383                 $this->firsttime = false;
 384
 385                 if ( $this->live ) {
 386                         $this->livePreview();
 387                         wfProfileOut( __METHOD__ );
 388                         return;
 389                 }
 390
 391                 if ( wfReadOnly() && $this->save ) {
 392                         // Force preview
 393                         $this->save = false;
 394                         $this->preview = true;
 395                 }
 396
 397                 $wgOut->addScriptFile( 'edit.js' );
 398
 399                 if( $wgEnableJS2system )
 400                     $wgOut->addScriptClass( 'editPage' );
 401
 402                 $permErrors = $this->getEditPermissionErrors();
 403                 if ( $permErrors ) {
 404                         wfDebug( __METHOD__.": User can't edit\n" );
 405                         $this->readOnlyPage( $this->getContent(), true, $permErrors, 'edit' );
 406                         wfProfileOut( __METHOD__ );
 407                         return;
 408                 } else {
 409                         if ( $this->save ) {
 410                                 $this->formtype = 'save';
 411                         } else if ( $this->preview ) {
 412                                 $this->formtype = 'preview';
 413                         } else if ( $this->diff ) {
 414                                 $this->formtype = 'diff';
 415                         } else { # First time through
 416                                 $this->firsttime = true;
 417                                 if ( $this->previewOnOpen() ) {
 418                                         $this->formtype = 'preview';
 419                                 } else {
 420                                         $this->extractMetaDataFromArticle () ;
 421                                         $this->formtype = 'initial';
 422                                 }
 423                         }
 424                 }
 425
 426                 // If they used redlink=1 and the page exists, redirect to the main article
 427                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 428                         $wgOut->redirect( $this->mTitle->getFullURL() );
 429                 }
 430
 431                 wfProfileIn( __METHOD__."-business-end" );
 432
 433                 $this->isConflict = false;
 434                 // css / js subpages of user pages get a special treatment
 435                 $this->isCssJsSubpage      = $this->mTitle->isCssJsSubpage();
 436                 $this->isCssSubpage        = $this->mTitle->isCssSubpage();
 437                 $this->isJsSubpage         = $this->mTitle->isJsSubpage();
 438                 $this->isValidCssJsSubpage = $this->mTitle->isValidCssJsSubpage();
 439
 440                 # Show applicable editing introductions
 441                 if ( $this->formtype == 'initial' || $this->firsttime )
 442                         $this->showIntro();
 443
 444                 if ( $this->mTitle->isTalkPage() ) {
 445                         $wgOut->addWikiMsg( 'talkpagetext' );
 446                 }
 447
 448                 # Optional notices on a per-namespace and per-page basis
 449                 $editnotice_ns   = 'editnotice-'.$this->mTitle->getNamespace();
 450                 if ( !wfEmptyMsg( $editnotice_ns, wfMsgForContent( $editnotice_ns ) ) ) {
 451                         $wgOut->addWikiText( wfMsgForContent( $editnotice_ns )  );
 452                 }
 453                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
 454                         $parts = explode( '/', $this->mTitle->getDBkey() );
 455                         $editnotice_base = $editnotice_ns;
 456                         while ( count( $parts ) > 0 ) {
 457                                 $editnotice_base .= '-'.array_shift( $parts );
 458                                 if ( !wfEmptyMsg( $editnotice_base, wfMsgForContent( $editnotice_base ) ) ) {
 459                                         $wgOut->addWikiText( wfMsgForContent( $editnotice_base )  );
 460                                 }
 461                         }
 462                 }
 463
 464                 # Attempt submission here.  This will check for edit conflicts,
 465                 # and redundantly check for locked database, blocked IPs, etc.
 466                 # that edit() already checked just in case someone tries to sneak
 467                 # in the back door with a hand-edited submission URL.
 468
 469                 if ( 'save' == $this->formtype ) {
 470                         if ( !$this->attemptSave() ) {
 471                                 wfProfileOut( __METHOD__."-business-end" );
 472                                 wfProfileOut( __METHOD__ );
 473                                 return;
 474                         }
 475                 }
 476
 477                 # First time through: get contents, set time for conflict
 478                 # checking, etc.
 479                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 480                         if ( $this->initialiseForm() === false) {
 481                                 $this->noSuchSectionPage();
 482                                 wfProfileOut( __METHOD__."-business-end" );
 483                                 wfProfileOut( __METHOD__ );
 484                                 return;
 485                         }
 486                         if ( !$this->mTitle->getArticleId() )
 487                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 488                 }
 489
 490                 $this->showEditForm();
 491                 wfProfileOut( __METHOD__."-business-end" );
 492                 wfProfileOut( __METHOD__ );
 493         }
 494
 495         protected function getEditPermissionErrors() {
 496                 global $wgUser;
 497                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 498                 # Can this title be created?
 499                 if ( !$this->mTitle->exists() ) {
 500                         $permErrors = array_merge( $permErrors,
 501                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 502                 }
 503                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 504                 $remove = array();
 505                 foreach( $permErrors as $error ) {
 506                         if ( ($this->preview || $this->diff) &&
 507                                 ($error[0] == 'blockedtext' || $error[0] == 'autoblockedtext') )
 508                         {
 509                                 $remove[] = $error;
 510                         }
 511                 }
 512                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 513                 return $permErrors;
 514         }
 515
 516         /**
 517          * Show a read-only error
 518          * Parameters are the same as OutputPage:readOnlyPage()
 519          * Redirect to the article page if redlink=1
 520          */
 521         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 522                 global $wgRequest, $wgOut;
 523                 if ( $wgRequest->getBool( 'redlink' ) ) {
 524                         // The edit page was reached via a red link.
 525                         // Redirect to the article page and let them click the edit tab if
 526                         // they really want a permission error.
 527                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 528                 } else {
 529                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 530                 }
 531         }
 532
 533         /**
 534          * Should we show a preview when the edit form is first shown?
 535          *
 536          * @return bool
 537          */
 538         protected function previewOnOpen() {
 539                 global $wgRequest, $wgUser;
 540                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 541                         // Explicit override from request
 542                         return true;
 543                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 544                         // Explicit override from request
 545                         return false;
 546                 } elseif ( $this->section == 'new' ) {
 547                         // Nothing *to* preview for new sections
 548                         return false;
 549                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 550                         // Standard preference behaviour
 551                         return true;
 552                 } elseif ( !$this->mTitle->exists() && $this->mTitle->getNamespace() == NS_CATEGORY ) {
 553                         // Categories are special
 554                         return true;
 555                 } else {
 556                         return false;
 557                 }
 558         }
 559
 560         /**
 561          * @todo document
 562          * @param $request
 563          */
 564         function importFormData( &$request ) {
 565                 global $wgLang, $wgUser;
 566                 $fname = 'EditPage::importFormData';
 567                 wfProfileIn( $fname );
 568
 569                 # Section edit can come from either the form or a link
 570                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 571
 572                 if ( $request->wasPosted() ) {
 573                         # These fields need to be checked for encoding.
 574                         # Also remove trailing whitespace, but don't remove _initial_
 575                         # whitespace from the text boxes. This may be significant formatting.
 576                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 577                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 578                         $this->mMetaData = rtrim( $request->getText( 'metadata' ) );
 579                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 580                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary' ), 250, '' );
 581
 582                         # Remove extra headings from summaries and new sections.
 583                         $this->summary = preg_replace('/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary);
 584
 585                         $this->edittime = $request->getVal( 'wpEdittime' );
 586                         $this->starttime = $request->getVal( 'wpStarttime' );
 587
 588                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 589
 590                         if ( is_null( $this->edittime ) ) {
 591                                 # If the form is incomplete, force to preview.
 592                                 wfDebug( "$fname: Form data appears to be incomplete\n" );
 593                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 594                                 $this->preview = true;
 595                         } else {
 596                                 /* Fallback for live preview */
 597                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 598                                 $this->diff = $request->getCheck( 'wpDiff' );
 599
 600                                 // Remember whether a save was requested, so we can indicate
 601                                 // if we forced preview due to session failure.
 602                                 $this->mTriedSave = !$this->preview;
 603
 604                                 if ( $this->tokenOk( $request ) ) {
 605                                         # Some browsers will not report any submit button
 606                                         # if the user hits enter in the comment box.
 607                                         # The unmarked state will be assumed to be a save,
 608                                         # if the form seems otherwise complete.
 609                                         wfDebug( "$fname: Passed token check.\n" );
 610                                 } else if ( $this->diff ) {
 611                                         # Failed token check, but only requested "Show Changes".
 612                                         wfDebug( "$fname: Failed token check; Show Changes requested.\n" );
 613                                 } else {
 614                                         # Page might be a hack attempt posted from
 615                                         # an external site. Preview instead of saving.
 616                                         wfDebug( "$fname: Failed token check; forcing preview\n" );
 617                                         $this->preview = true;
 618                                 }
 619                         }
 620                         $this->save = !$this->preview && !$this->diff;
 621                         if ( !preg_match( '/^\d{14}$/', $this->edittime )) {
 622                                 $this->edittime = null;
 623                         }
 624
 625                         if ( !preg_match( '/^\d{14}$/', $this->starttime )) {
 626                                 $this->starttime = null;
 627                         }
 628
 629                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 630
 631                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 632                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 633
 634                         # Don't force edit summaries when a user is editing their own user or talk page
 635                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 636                                 $this->mTitle->getText() == $wgUser->getName() )
 637                         {
 638                                 $this->allowBlankSummary = true;
 639                         } else {
 640                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary');
 641                         }
 642
 643                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 644                 } else {
 645                         # Not a posted form? Start with nothing.
 646                         wfDebug( "$fname: Not a posted form.\n" );
 647                         $this->textbox1  = '';
 648                         $this->textbox2  = '';
 649                         $this->mMetaData = '';
 650                         $this->summary   = '';
 651                         $this->edittime  = '';
 652                         $this->starttime = wfTimestampNow();
 653                         $this->edit      = false;
 654                         $this->preview   = false;
 655                         $this->save      = false;
 656                         $this->diff      = false;
 657                         $this->minoredit = false;
 658                         $this->watchthis = false;
 659                         $this->recreate  = false;
 660
 661                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 662                                 $this->summary = $request->getVal( 'preloadtitle' );
 663                         }
 664                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 665                                 $this->summary = $request->getText( 'summary' );
 666                         }
 667
 668                         if ( $request->getVal( 'minor' ) ) {
 669                                 $this->minoredit = true;
 670                         }
 671                 }
 672
 673                 // FIXME: unused variable?
 674                 $this->oldid = $request->getInt( 'oldid' );
 675
 676                 $this->live = $request->getCheck( 'live' );
 677                 $this->editintro = $request->getText( 'editintro' );
 678
 679                 wfProfileOut( $fname );
 680
 681                 // Allow extensions to modify form data
 682                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 683         }
 684
 685         /**
 686          * Make sure the form isn't faking a user's credentials.
 687          *
 688          * @param $request WebRequest
 689          * @return bool
 690          * @private
 691          */
 692         function tokenOk( &$request ) {
 693                 global $wgUser;
 694                 $token = $request->getVal( 'wpEditToken' );
 695                 $this->mTokenOk = $wgUser->matchEditToken( $token );
 696                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
 697                 return $this->mTokenOk;
 698         }
 699
 700         /**
 701          * Show all applicable editing introductions
 702          */
 703         protected function showIntro() {
 704                 global $wgOut, $wgUser;
 705                 if ( $this->suppressIntro ) {
 706                         return;
 707                 }
 708
 709                 $namespace = $this->mTitle->getNamespace();
 710
 711                 if ( $namespace == NS_MEDIAWIKI ) {
 712                         # Show a warning if editing an interface message
 713                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1</div>", 'editinginterface' );
 714                 }
 715
 716                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exists
 717                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
 718                         $parts = explode( '/', $this->mTitle->getText(), 2 );
 719                         $username = $parts[0];
 720                         $id = User::idFromName( $username );
 721                         $ip = User::isIP( $username );
 722                         if ( $id == 0 && !$ip ) {
 723                                 $wgOut->wrapWikiMsg( '<div class="mw-userpage-userdoesnotexist error">$1</div>',
 724                                         array( 'userpage-userdoesnotexist', $username ) );
 725                         }
 726                 }
 727                 # Try to add a custom edit intro, or use the standard one if this is not possible.
 728                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
 729                         if ( $wgUser->isLoggedIn() ) {
 730                                 $wgOut->wrapWikiMsg( '<div class="mw-newarticletext">$1</div>', 'newarticletext' );
 731                         } else {
 732                                 $wgOut->wrapWikiMsg( '<div class="mw-newarticletextanon">$1</div>', 'newarticletextanon' );
 733                         }
 734                 }
 735                 # Give a notice if the user is editing a deleted/moved page...
 736                 if ( !$this->mTitle->exists() ) {
 737                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle->getPrefixedText(),
 738                                 '', array( 'lim' => 10,
 739                                            'conds' => array( "log_action != 'revision'" ),
 740                                            'showIfEmpty' => false,
 741                                            'msgKey' => array( 'recreate-moveddeleted-warn') )
 742                         );
 743                 }
 744         }
 745
 746         /**
 747          * Attempt to show a custom editing introduction, if supplied
 748          *
 749          * @return bool
 750          */
 751         protected function showCustomIntro() {
 752                 if ( $this->editintro ) {
 753                         $title = Title::newFromText( $this->editintro );
 754                         if ( $title instanceof Title && $title->exists() && $title->userCanRead() ) {
 755                                 global $wgOut;
 756                                 $revision = Revision::newFromTitle( $title );
 757                                 $wgOut->addWikiTextTitleTidy( $revision->getText(), $this->mTitle );
 758                                 return true;
 759                         } else {
 760                                 return false;
 761                         }
 762                 } else {
 763                         return false;
 764                 }
 765         }
 766
 767         /**
 768          * Attempt submission (no UI)
 769          * @return one of the constants describing the result
 770          */
 771         function internalAttemptSave( &$result, $bot = false ) {
 772                 global $wgFilterCallback, $wgUser, $wgOut, $wgParser;
 773                 global $wgMaxArticleSize;
 774
 775                 $fname = 'EditPage::attemptSave';
 776                 wfProfileIn( $fname );
 777                 wfProfileIn( "$fname-checks" );
 778
 779                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) )
 780                 {
 781                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
 782                         return self::AS_HOOK_ERROR;
 783                 }
 784
 785                 # Check image redirect
 786                 if ( $this->mTitle->getNamespace() == NS_FILE &&
 787                         Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
 788                         !$wgUser->isAllowed( 'upload' ) ) {
 789                                 if ( $wgUser->isAnon() ) {
 790                                         return self::AS_IMAGE_REDIRECT_ANON;
 791                                 } else {
 792                                         return self::AS_IMAGE_REDIRECT_LOGGED;
 793                                 }
 794                 }
 795
 796                 # Reintegrate metadata
 797                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 798                 $this->mMetaData = '' ;
 799
 800                 # Check for spam
 801                 $match = self::matchSummarySpamRegex( $this->summary );
 802                 if ( $match === false ) {
 803                         $match = self::matchSpamRegex( $this->textbox1 );
 804                 }
 805                 if ( $match !== false ) {
 806                         $result['spam'] = $match;
 807                         $ip = wfGetIP();
 808                         $pdbk = $this->mTitle->getPrefixedDBkey();
 809                         $match = str_replace( "\n", '', $match );
 810                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
 811                         wfProfileOut( "$fname-checks" );
 812                         wfProfileOut( $fname );
 813                         return self::AS_SPAM_ERROR;
 814                 }
 815                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
 816                         # Error messages or other handling should be performed by the filter function
 817                         wfProfileOut( "$fname-checks" );
 818                         wfProfileOut( $fname );
 819                         return self::AS_FILTERING;
 820                 }
 821                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
 822                         # Error messages etc. could be handled within the hook...
 823                         wfProfileOut( "$fname-checks" );
 824                         wfProfileOut( $fname );
 825                         return self::AS_HOOK_ERROR;
 826                 } elseif ( $this->hookError != '' ) {
 827                         # ...or the hook could be expecting us to produce an error
 828                         wfProfileOut( "$fname-checks" );
 829                         wfProfileOut( $fname );
 830                         return self::AS_HOOK_ERROR_EXPECTED;
 831                 }
 832                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 833                         # Check block state against master, thus 'false'.
 834                         wfProfileOut( "$fname-checks" );
 835                         wfProfileOut( $fname );
 836                         return self::AS_BLOCKED_PAGE_FOR_USER;
 837                 }
 838                 $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 839                 if ( $this->kblength > $wgMaxArticleSize ) {
 840                         // Error will be displayed by showEditForm()
 841                         $this->tooBig = true;
 842                         wfProfileOut( "$fname-checks" );
 843                         wfProfileOut( $fname );
 844                         return self::AS_CONTENT_TOO_BIG;
 845                 }
 846
 847                 if ( !$wgUser->isAllowed('edit') ) {
 848                         if ( $wgUser->isAnon() ) {
 849                                 wfProfileOut( "$fname-checks" );
 850                                 wfProfileOut( $fname );
 851                                 return self::AS_READ_ONLY_PAGE_ANON;
 852                         }
 853                         else {
 854                                 wfProfileOut( "$fname-checks" );
 855                                 wfProfileOut( $fname );
 856                                 return self::AS_READ_ONLY_PAGE_LOGGED;
 857                         }
 858                 }
 859
 860                 if ( wfReadOnly() ) {
 861                         wfProfileOut( "$fname-checks" );
 862                         wfProfileOut( $fname );
 863                         return self::AS_READ_ONLY_PAGE;
 864                 }
 865                 if ( $wgUser->pingLimiter() ) {
 866                         wfProfileOut( "$fname-checks" );
 867                         wfProfileOut( $fname );
 868                         return self::AS_RATE_LIMITED;
 869                 }
 870
 871                 # If the article has been deleted while editing, don't save it without
 872                 # confirmation
 873                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
 874                         wfProfileOut( "$fname-checks" );
 875                         wfProfileOut( $fname );
 876                         return self::AS_ARTICLE_WAS_DELETED;
 877                 }
 878
 879                 wfProfileOut( "$fname-checks" );
 880
 881                 # If article is new, insert it.
 882                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 883                 if ( 0 == $aid ) {
 884                         // Late check for create permission, just in case *PARANOIA*
 885                         if ( !$this->mTitle->userCan( 'create' ) ) {
 886                                 wfDebug( "$fname: no create permission\n" );
 887                                 wfProfileOut( $fname );
 888                                 return self::AS_NO_CREATE_PERMISSION;
 889                         }
 890
 891                         # Don't save a new article if it's blank.
 892                         if ( '' == $this->textbox1 ) {
 893                                 wfProfileOut( $fname );
 894                                 return self::AS_BLANK_ARTICLE;
 895                         }
 896
 897                         // Run post-section-merge edit filter
 898                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
 899                                 # Error messages etc. could be handled within the hook...
 900                                 wfProfileOut( $fname );
 901                                 return self::AS_HOOK_ERROR;
 902                         } elseif ( $this->hookError != '' ) {
 903                                 # ...or the hook could be expecting us to produce an error
 904                                 wfProfileOut( $fname );
 905                                 return self::AS_HOOK_ERROR_EXPECTED;
 906                         }
 907
 908                         # Handle the user preference to force summaries here. Check if it's not a redirect.
 909                         if ( !$this->allowBlankSummary && !Title::newFromRedirect( $this->textbox1 ) ) {
 910                                 if ( md5( $this->summary ) == $this->autoSumm ) {
 911                                         $this->missingSummary = true;
 912                                         wfProfileOut( $fname );
 913                                         return self::AS_SUMMARY_NEEDED;
 914                                 }
 915                         }
 916
 917                         $isComment = ( $this->section == 'new' );
 918
 919                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 920                                 $this->minoredit, $this->watchthis, false, $isComment, $bot );
 921
 922                         wfProfileOut( $fname );
 923                         return self::AS_SUCCESS_NEW_ARTICLE;
 924                 }
 925
 926                 # Article exists. Check for edit conflict.
 927
 928                 $this->mArticle->clear(); # Force reload of dates, etc.
 929                 $this->mArticle->forUpdate( true ); # Lock the article
 930
 931                 wfDebug("timestamp: {$this->mArticle->getTimestamp()}, edittime: {$this->edittime}\n");
 932
 933                 if ( $this->mArticle->getTimestamp() != $this->edittime ) {
 934                         $this->isConflict = true;
 935                         if ( $this->section == 'new' ) {
 936                                 if ( $this->mArticle->getUserText() == $wgUser->getName() &&
 937                                         $this->mArticle->getComment() == $this->summary ) {
 938                                         // Probably a duplicate submission of a new comment.
 939                                         // This can happen when squid resends a request after
 940                                         // a timeout but the first one actually went through.
 941                                         wfDebug( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
 942                                 } else {
 943                                         // New comment; suppress conflict.
 944                                         $this->isConflict = false;
 945                                         wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
 946                                 }
 947                         }
 948                 }
 949                 $userid = $wgUser->getId();
 950
 951                 # Suppress edit conflict with self, except for section edits where merging is required.
 952                 if ( $this->isConflict && $this->section == '' && $this->userWasLastToEdit($userid,$this->edittime) ) {
 953                         wfDebug( "EditPage::editForm Suppressing edit conflict, same user.\n" );
 954                         $this->isConflict = false;
 955                 }
 956
 957                 if ( $this->isConflict ) {
 958                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 959                                 $this->mArticle->getTimestamp() . "')\n" );
 960                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime );
 961                 } else {
 962                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 963                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary );
 964                 }
 965                 if ( is_null( $text ) ) {
 966                         wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
 967                         $this->isConflict = true;
 968                         $text = $this->textbox1; // do not try to merge here!
 969                 } else if ( $this->isConflict ) {
 970                         # Attempt merge
 971                         if ( $this->mergeChangesInto( $text ) ) {
 972                                 // Successful merge! Maybe we should tell the user the good news?
 973                                 $this->isConflict = false;
 974                                 wfDebug( "EditPage::editForm Suppressing edit conflict, successful merge.\n" );
 975                         } else {
 976                                 $this->section = '';
 977                                 $this->textbox1 = $text;
 978                                 wfDebug( "EditPage::editForm Keeping edit conflict, failed merge.\n" );
 979                         }
 980                 }
 981
 982                 if ( $this->isConflict ) {
 983                         wfProfileOut( $fname );
 984                         return self::AS_CONFLICT_DETECTED;
 985                 }
 986
 987                 $oldtext = $this->mArticle->getContent();
 988
 989                 // Run post-section-merge edit filter
 990                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError, $this->summary ) ) ) {
 991                         # Error messages etc. could be handled within the hook...
 992                         wfProfileOut( $fname );
 993                         return self::AS_HOOK_ERROR;
 994                 } elseif ( $this->hookError != '' ) {
 995                         # ...or the hook could be expecting us to produce an error
 996                         wfProfileOut( $fname );
 997                         return self::AS_HOOK_ERROR_EXPECTED;
 998                 }
 999
1000                 # Handle the user preference to force summaries here, but not for null edits
1001                 if ( $this->section != 'new' && !$this->allowBlankSummary && 0 != strcmp($oldtext,$text)
1002                         && !Title::newFromRedirect( $text ) ) # check if it's not a redirect
1003                 {
1004                         if ( md5( $this->summary ) == $this->autoSumm ) {
1005                                 $this->missingSummary = true;
1006                                 wfProfileOut( $fname );
1007                                 return self::AS_SUMMARY_NEEDED;
1008                         }
1009                 }
1010
1011                 # And a similar thing for new sections
1012                 if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1013                         if (trim($this->summary) == '') {
1014                                 $this->missingSummary = true;
1015                                 wfProfileOut( $fname );
1016                                 return self::AS_SUMMARY_NEEDED;
1017                         }
1018                 }
1019
1020                 # All's well
1021                 wfProfileIn( "$fname-sectionanchor" );
1022                 $sectionanchor = '';
1023                 if ( $this->section == 'new' ) {
1024                         if ( $this->textbox1 == '' ) {
1025                                 $this->missingComment = true;
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( $matches[2] );
1044                         }
1045                 }
1046                 wfProfileOut( "$fname-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( $fname );
1060                         return self::AS_MAX_ARTICLE_SIZE_EXCEEDED;
1061                 }
1062
1063                 # update the article here
1064                 if ( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
1065                         $this->watchthis, $bot, $sectionanchor ) )
1066                 {
1067                         wfProfileOut( $fname );
1068                         return self::AS_SUCCESS_UPDATE;
1069                 } else {
1070                         $this->isConflict = true;
1071                 }
1072                 wfProfileOut( $fname );
1073                 return self::AS_END;
1074         }
1075
1076         /**
1077          * Check if no edits were made by other users since
1078          * the time a user started editing the page. Limit to
1079          * 50 revisions for the sake of performance.
1080          */
1081         protected function userWasLastToEdit( $id, $edittime ) {
1082                 if( !$id ) return false;
1083                 $dbw = wfGetDB( DB_MASTER );
1084                 $res = $dbw->select( 'revision',
1085                         'rev_user',
1086                         array(
1087                                 'rev_page' => $this->mArticle->getId(),
1088                                 'rev_timestamp > '.$dbw->addQuotes( $dbw->timestamp($edittime) )
1089                         ),
1090                         __METHOD__,
1091                         array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
1092                 while( $row = $res->fetchObject() ) {
1093                         if( $row->rev_user != $id ) {
1094                                 return false;
1095                         }
1096                 }
1097                 return true;
1098         }
1099
1100         /**
1101          * Check given input text against $wgSpamRegex, and return the text of the first match.
1102          * @return mixed -- matching string or false
1103          */
1104         public static function matchSpamRegex( $text ) {
1105                 global $wgSpamRegex;
1106                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1107                 $regexes = (array)$wgSpamRegex;
1108                 return self::matchSpamRegexInternal( $text, $regexes );
1109         }
1110
1111         /**
1112          * Check given input text against $wgSpamRegex, and return the text of the first match.
1113          * @return mixed -- matching string or false
1114          */
1115         public static function matchSummarySpamRegex( $text ) {
1116                 global $wgSummarySpamRegex;
1117                 $regexes = (array)$wgSummarySpamRegex;
1118                 return self::matchSpamRegexInternal( $text, $regexes );
1119         }
1120
1121         protected static function matchSpamRegexInternal( $text, $regexes ) {
1122                 foreach( $regexes as $regex ) {
1123                         $matches = array();
1124                         if( preg_match( $regex, $text, $matches ) ) {
1125                                 return $matches[0];
1126                         }
1127                 }
1128                 return false;
1129         }
1130
1131         /**
1132          * Initialise form fields in the object
1133          * Called on the first invocation, e.g. when a user clicks an edit link
1134          */
1135         function initialiseForm() {
1136                 $this->edittime = $this->mArticle->getTimestamp();
1137                 $this->textbox1 = $this->getContent( false );
1138                 if ( $this->textbox1 === false ) return false;
1139                 wfProxyCheck();
1140                 return true;
1141         }
1142
1143         function setHeaders() {
1144                 global $wgOut, $wgTitle;
1145                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1146                 if ( $this->formtype == 'preview' ) {
1147                         $wgOut->setPageTitleActionText( wfMsg( 'preview' ) );
1148                 }
1149                 if ( $this->isConflict ) {
1150                         $wgOut->setPageTitle( wfMsg( 'editconflict', $wgTitle->getPrefixedText() ) );
1151                 } elseif ( $this->section != '' ) {
1152                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1153                         $wgOut->setPageTitle( wfMsg( $msg, $wgTitle->getPrefixedText() ) );
1154                 } else {
1155                         # Use the title defined by DISPLAYTITLE magic word when present
1156                         if ( isset($this->mParserOutput)
1157                          && ( $dt = $this->mParserOutput->getDisplayTitle() ) !== false ) {
1158                                 $title = $dt;
1159                         } else {
1160                                 $title = $wgTitle->getPrefixedText();
1161                         }
1162                         $wgOut->setPageTitle( wfMsg( 'editing', $title ) );
1163                 }
1164         }
1165
1166         /**
1167          * Send the edit form and related headers to $wgOut
1168          * @param $formCallback Optional callable that takes an OutputPage
1169          *                      parameter; will be called during form output
1170          *                      near the top, for captchas and the like.
1171          */
1172         function showEditForm( $formCallback=null ) {
1173                 global $wgOut, $wgUser, $wgLang, $wgContLang, $wgMaxArticleSize, $wgTitle, $wgRequest;
1174
1175                 # If $wgTitle is null, that means we're in API mode.
1176                 # Some hook probably called this function  without checking
1177                 # for is_null($wgTitle) first. Bail out right here so we don't
1178                 # do lots of work just to discard it right after.
1179                 if (is_null($wgTitle))
1180                         return;
1181
1182                 $fname = 'EditPage::showEditForm';
1183                 wfProfileIn( $fname );
1184
1185                 $sk = $wgUser->getSkin();
1186
1187                 #need to parse the preview early so that we know which templates are used,
1188                 #otherwise users with "show preview after edit box" will get a blank list
1189                 #we parse this near the beginning so that setHeaders can do the title
1190                 #setting work instead of leaving it in getPreviewText
1191                 $previewOutput = '';
1192                 if ( $this->formtype == 'preview' ) {
1193                         $previewOutput = $this->getPreviewText();
1194                 }
1195
1196                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) );
1197
1198                 $this->setHeaders();
1199
1200                 # Enabled article-related sidebar, toplinks, etc.
1201                 $wgOut->setArticleRelated( true );
1202
1203                 $cancelParams = array();
1204
1205                 if ( $this->isConflict ) {
1206                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1</div>", 'explainconflict' );
1207
1208                         $this->textbox2 = $this->textbox1;
1209                         $this->textbox1 = $this->getContent();
1210                         $this->edittime = $this->mArticle->getTimestamp();
1211                 } else {
1212                         if ( $this->section != '' && $this->section != 'new' ) {
1213                                 $matches = array();
1214                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
1215                                         preg_match( "/^(=+)(.+)\\1/mi", $this->textbox1, $matches );
1216                                         if ( !empty( $matches[2] ) ) {
1217                                                 global $wgParser;
1218                                                 $this->summary = "/* " .
1219                                                         $wgParser->stripSectionName(trim($matches[2])) .
1220                                                         " */ ";
1221                                         }
1222                                 }
1223                         }
1224
1225                         if ( $this->missingComment ) {
1226                                 $wgOut->wrapWikiMsg( '<div id="mw-missingcommenttext">$1</div>', 'missingcommenttext' );
1227                         }
1228
1229                         if ( $this->missingSummary && $this->section != 'new' ) {
1230                                 $wgOut->wrapWikiMsg( '<div id="mw-missingsummary">$1</div>', 'missingsummary' );
1231                         }
1232
1233                         if ( $this->missingSummary && $this->section == 'new' ) {
1234                                 $wgOut->wrapWikiMsg( '<div id="mw-missingcommentheader">$1</div>', 'missingcommentheader' );
1235                         }
1236
1237                         if ( $this->hookError !== '' ) {
1238                                 $wgOut->addWikiText( $this->hookError );
1239                         }
1240
1241                         if ( !$this->checkUnicodeCompliantBrowser() ) {
1242                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
1243                         }
1244                         if ( isset( $this->mArticle ) && isset( $this->mArticle->mRevision ) ) {
1245                         // Let sysop know that this will make private content public if saved
1246
1247                                 if ( !$this->mArticle->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1248                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", 'rev-deleted-text-permission' );
1249                                 } else if ( $this->mArticle->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1250                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", 'rev-deleted-text-view' );
1251                                 }
1252
1253                                 if ( !$this->mArticle->mRevision->isCurrent() ) {
1254                                         $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
1255                                         $cancelParams['oldid'] = $this->mArticle->mRevision->getId();
1256                                         $wgOut->addWikiMsg( 'editingold' );
1257                                 }
1258                         }
1259                 }
1260
1261                 if ( wfReadOnly() ) {
1262                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
1263                 } elseif ( $wgUser->isAnon() && $this->formtype != 'preview' ) {
1264                         $wgOut->wrapWikiMsg( '<div id="mw-anon-edit-warning">$1</div>', 'anoneditwarning' );
1265                 } else {
1266                         if ( $this->isCssJsSubpage ) {
1267                                 # Check the skin exists
1268                                 if ( !$this->isValidCssJsSubpage ) {
1269                                         $wgOut->addWikiMsg( 'userinvalidcssjstitle', $wgTitle->getSkinFromCssJsSubpage() );
1270                                 }
1271                                 if ( $this->formtype !== 'preview' ) {
1272                                         if ( $this->isCssSubpage )
1273                                                 $wgOut->addWikiMsg( 'usercssyoucanpreview' );
1274                                         if ( $this->isJsSubpage )
1275                                                 $wgOut->addWikiMsg( 'userjsyoucanpreview' );
1276                                 }
1277                         }
1278                 }
1279
1280                 $classes = array(); // Textarea CSS
1281                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1282                 } elseif ( $this->mTitle->isProtected( 'edit' ) ) {
1283                         # Is the title semi-protected?
1284                         if ( $this->mTitle->isSemiProtected() ) {
1285                                 $noticeMsg = 'semiprotectedpagewarning';
1286                                 $classes[] = 'mw-textarea-sprotected';
1287                         } else {
1288                                 # Then it must be protected based on static groups (regular)
1289                                 $noticeMsg = 'protectedpagewarning';
1290                                 $classes[] = 'mw-textarea-protected';
1291                         }
1292                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle->getPrefixedText(), '',
1293                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
1294                 }
1295                 if ( $this->mTitle->isCascadeProtected() ) {
1296                         # Is this page under cascading protection from some source pages?
1297                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1298                         $notice = "<div class='mw-cascadeprotectedwarning'>$1\n";
1299                         $cascadeSourcesCount = count( $cascadeSources );
1300                         if ( $cascadeSourcesCount > 0 ) {
1301                                 # Explain, and list the titles responsible
1302                                 foreach( $cascadeSources as $page ) {
1303                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1304                                 }
1305                         }
1306                         $notice .= '</div>';
1307                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
1308                 }
1309                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
1310                         $wgOut->wrapWikiMsg( '<div class="mw-titleprotectedwarning">$1</div>', 'titleprotectedwarning' );
1311                 }
1312
1313                 if ( $this->kblength === false ) {
1314                         $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
1315                 }
1316                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
1317                         $wgOut->addHTML( "<div class='error' id='mw-edit-longpageerror'>\n" );
1318                         $wgOut->addWikiMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) );
1319                         $wgOut->addHTML( "</div>\n" );
1320                 } elseif ( $this->kblength > 29 ) {
1321                         $wgOut->addHTML( "<div id='mw-edit-longpagewarning'>\n" );
1322                         $wgOut->addWikiMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) );
1323                         $wgOut->addHTML( "</div>\n" );
1324                 }
1325
1326                 $action = $wgTitle->escapeLocalURL( array( 'action' => $this->action ) );
1327
1328                 $summary = wfMsgExt( 'summary', 'parseinline' );
1329                 $subject = wfMsgExt( 'subject', 'parseinline' );
1330
1331                 $cancel = $sk->link(
1332                         $wgTitle,
1333                         wfMsgExt( 'cancel', array( 'parseinline' ) ),
1334                         array( 'id' => 'mw-editform-cancel' ),
1335                         $cancelParams,
1336                         array( 'known', 'noclasses' )
1337                 );
1338                 $separator = wfMsgExt( 'pipe-separator' , 'escapenoentities' );
1339                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ));
1340                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
1341                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
1342                         htmlspecialchars( wfMsg( 'newwindow' ) );
1343
1344                 global $wgRightsText;
1345                 if ( $wgRightsText ) {
1346                         $copywarnMsg = array( 'copyrightwarning',
1347                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
1348                                 $wgRightsText );
1349                 } else {
1350                         $copywarnMsg = array( 'copyrightwarning2',
1351                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
1352                 }
1353                 // Allow for site and per-namespace customization of contribution/copyright notice.
1354                 wfRunHooks( 'EditPageCopyrightWarning', array( $this->mTitle, &$copywarnMsg ) );
1355
1356                 if ( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
1357                         # prepare toolbar for edit buttons
1358                         $toolbar = EditPage::getEditToolbar();
1359                 } else {
1360                         $toolbar = '';
1361                 }
1362
1363
1364                 // activate checkboxes if user wants them to be always active
1365                 if ( !$this->preview && !$this->diff ) {
1366                         # Sort out the "watch" checkbox
1367                         if ( $wgUser->getOption( 'watchdefault' ) ) {
1368                                 # Watch all edits
1369                                 $this->watchthis = true;
1370                         } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1371                                 # Watch creations
1372                                 $this->watchthis = true;
1373                         } elseif ( $this->mTitle->userIsWatching() ) {
1374                                 # Already watched
1375                                 $this->watchthis = true;
1376                         }
1377
1378                         # May be overriden by request parameters
1379                         if( $wgRequest->getBool( 'watchthis' ) ) {
1380                                 $this->watchthis = true;
1381                         }
1382
1383                         if ( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
1384                 }
1385
1386                 $wgOut->addHTML( $this->editFormPageTop );
1387
1388                 if ( $wgUser->getOption( 'previewontop' ) ) {
1389                         $this->displayPreviewArea( $previewOutput, true );
1390                 }
1391
1392
1393                 $wgOut->addHTML( $this->editFormTextTop );
1394
1395                 # if this is a comment, show a subject line at the top, which is also the edit summary.
1396                 # Otherwise, show a summary field at the bottom
1397                 $summarytext = $wgContLang->recodeForEdit( $this->summary );
1398
1399                 # If a blank edit summary was previously provided, and the appropriate
1400                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1401                 # user being bounced back more than once in the event that a summary
1402                 # is not required.
1403                 #####
1404                 # For a bit more sophisticated detection of blank summaries, hash the
1405                 # automatic one and pass that in the hidden field wpAutoSummary.
1406                 $summaryhiddens =  '';
1407                 if ( $this->missingSummary ) $summaryhiddens .= Xml::hidden( 'wpIgnoreBlankSummary', true );
1408                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1409                 $summaryhiddens .= Xml::hidden( 'wpAutoSummary', $autosumm );
1410                 if ( $this->section == 'new' ) {
1411                         $commentsubject = '';
1412                         if ( !$wgRequest->getBool( 'nosummary' ) ) {
1413                                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
1414                                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
1415
1416                                 $commentsubject =
1417                                         Xml::tags( 'label', array( 'for' => 'wpSummary' ), $subject );
1418                                 $commentsubject =
1419                                         Xml::tags( 'span', array( 'class' => $summaryClass, 'id' => "wpSummaryLabel" ),
1420                                                 $commentsubject );
1421                                 $commentsubject .= '&nbsp;';
1422                                 $commentsubject .= Xml::input( 'wpSummary',
1423                                                                         60,
1424                                                                         $summarytext,
1425                                                                         array(
1426                                                                                 'id' => 'wpSummary',
1427                                                                                 'maxlength' => '200',
1428                                                                                 'tabindex' => '1'
1429                                                                         ) );
1430                         } else {
1431                                 $summaryhiddens .= Xml::hidden( 'wpIgnoreBlankSummary', true ); # bug 18699
1432                         }
1433                         $editsummary = "<div class='editOptions'>\n";
1434                         global $wgParser;
1435                         $formattedSummary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $this->summary ) );
1436                         $subjectpreview = $summarytext && ( $this->preview || $this->diff ) ?
1437                                 "<div class=\"mw-summary-preview\">". wfMsgExt('subject-preview', 'parseinline') . $sk->commentBlock( $formattedSummary, $this->mTitle, true )."</div>\n" : '';
1438                         $summarypreview = '';
1439                 } else {
1440                         $commentsubject = '';
1441
1442                         # Add a class if 'missingsummary' is triggered to allow styling of the summary line
1443                         $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
1444
1445                         $editsummary = Xml::tags( 'label', array( 'for' => 'wpSummary' ), $summary );
1446                         $editsummary = Xml::tags( 'span',  array( 'class' => $summaryClass, 'id' => "wpSummaryLabel" ),
1447                                         $editsummary ) . ' ';
1448
1449                         $editsummary .= Xml::input( 'wpSummary',
1450                                 60,
1451                                 $summarytext,
1452                                 array(
1453                                         'id' => 'wpSummary',
1454                                         'maxlength' => '200',
1455                                         'tabindex' => '1'
1456                                 ) );
1457
1458                         // No idea where this is closed.
1459                         $editsummary = Xml::openElement( 'div', array( 'class' => 'editOptions' ) )
1460                                                         . $editsummary . '<br/>';
1461
1462                         $summarypreview = '';
1463                         if ( $summarytext && ( $this->preview || $this->diff ) ) {
1464                                 $summarypreview =
1465                                         Xml::tags( 'div',
1466                                                 array( 'class' => 'mw-summary-preview' ),
1467                                                 wfMsgExt( 'summary-preview', 'parseinline' ) .
1468                                                         $sk->commentBlock( $this->summary, $this->mTitle )
1469                                         );
1470                         }
1471                         $subjectpreview = '';
1472                 }
1473                 $commentsubject .= $summaryhiddens;
1474
1475                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
1476                 if ( !$this->preview && !$this->diff ) {
1477                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
1478                 }
1479                 $templates = $this->getTemplates();
1480                 $formattedtemplates = $sk->formatTemplates( $templates, $this->preview, $this->section != '');
1481
1482                 $hiddencats = $this->mArticle->getHiddenCategories();
1483                 $formattedhiddencats = $sk->formatHiddenCategories( $hiddencats );
1484
1485                 global $wgUseMetadataEdit ;
1486                 if ( $wgUseMetadataEdit ) {
1487                         $metadata = $this->mMetaData ;
1488                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
1489                         $top = wfMsgWikiHtml( 'metadata_help' );
1490                         /* ToDo: Replace with clean code */
1491                         $ew = $wgUser->getOption( 'editwidth' );
1492                         if ( $ew ) $ew = " style=\"width:100%\"";
1493                         else $ew = '';
1494                         $cols = $wgUser->getIntOption( 'cols' );
1495                         /* /ToDo */
1496                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
1497                 }
1498                 else $metadata = "" ;
1499
1500                 $recreate = '';
1501                 if ( $this->wasDeletedSinceLastEdit() ) {
1502                         if ( 'save' != $this->formtype ) {
1503                                 $wgOut->wrapWikiMsg(
1504                                         "<div class='error mw-deleted-while-editing'>\n$1</div>",
1505                                         'deletedwhileediting' );
1506                         } else {
1507                                 // Hide the toolbar and edit area, user can click preview to get it back
1508                                 // Add an confirmation checkbox and explanation.
1509                                 $toolbar = '';
1510                                 $recreate = '<div class="mw-confirm-recreate">' .
1511                                                 $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ) ) .
1512                                                 Xml::checkLabel( wfMsg( 'recreate' ), 'wpRecreate', 'wpRecreate', false,
1513                                                         array( 'title' => $sk->titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
1514                                                 ) . '</div>';
1515                         }
1516                 }
1517
1518                 $tabindex = 2;
1519
1520                 $checkboxes = $this->getCheckboxes( $tabindex, $sk,
1521                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
1522
1523                 $checkboxhtml = implode( $checkboxes, "\n" );
1524
1525                 $buttons = $this->getEditButtons( $tabindex );
1526                 $buttonshtml = implode( $buttons, "\n" );
1527
1528                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
1529                         ? '' : Xml::hidden( 'safemode', '1' );
1530
1531                 $wgOut->addHTML( <<<END
1532 {$toolbar}
1533 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1534 END
1535 );
1536
1537                 if ( is_callable( $formCallback ) ) {
1538                         call_user_func_array( $formCallback, array( &$wgOut ) );
1539                 }
1540
1541                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1542
1543                 // Put these up at the top to ensure they aren't lost on early form submission
1544                 $this->showFormBeforeText();
1545
1546                 $wgOut->addHTML( <<<END
1547 {$recreate}
1548 {$commentsubject}
1549 {$subjectpreview}
1550 {$this->editFormTextBeforeContent}
1551 END
1552 );
1553                 $this->showTextbox1( $classes );
1554
1555                 $wgOut->addHTML( $this->editFormTextAfterContent );
1556
1557                 $wgOut->wrapWikiMsg( "<div id=\"editpage-copywarn\">\n$1\n</div>", $copywarnMsg );
1558                 $wgOut->addHTML( <<<END
1559 {$this->editFormTextAfterWarn}
1560 {$metadata}
1561 {$editsummary}
1562 {$summarypreview}
1563 {$checkboxhtml}
1564 {$safemodehtml}
1565 END
1566 );
1567
1568                 $wgOut->addHTML(
1569 "<div class='editButtons'>
1570 {$buttonshtml}
1571         <span class='editHelp'>{$cancel}{$separator}{$edithelp}</span>
1572 </div><!-- editButtons -->
1573 </div><!-- editOptions -->");
1574
1575                 /**
1576                  * To make it harder for someone to slip a user a page
1577                  * which submits an edit form to the wiki without their
1578                  * knowledge, a random token is associated with the login
1579                  * session. If it's not passed back with the submission,
1580                  * we won't save the page, or render user JavaScript and
1581                  * CSS previews.
1582                  *
1583                  * For anon editors, who may not have a session, we just
1584                  * include the constant suffix to prevent editing from
1585                  * broken text-mangling proxies.
1586                  */
1587                 $token = htmlspecialchars( $wgUser->editToken() );
1588                 $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1589
1590                 $this->showTosSummary();
1591                 $this->showEditTools();
1592
1593                 $wgOut->addHTML( <<<END
1594 {$this->editFormTextAfterTools}
1595 <div class='templatesUsed'>
1596 {$formattedtemplates}
1597 </div>
1598 <div class='hiddencats'>
1599 {$formattedhiddencats}
1600 </div>
1601 END
1602 );
1603
1604                 if ( $this->isConflict && wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
1605                         $wgOut->wrapWikiMsg( '==$1==', "yourdiff" );
1606
1607                         $de = new DifferenceEngine( $this->mTitle );
1608                         $de->setText( $this->textbox2, $this->textbox1 );
1609                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1610
1611                         $wgOut->wrapWikiMsg( '==$1==', "yourtext" );
1612                         $this->showTextbox2();
1613                 }
1614                 $wgOut->addHTML( $this->editFormTextBottom );
1615                 $wgOut->addHTML( "</form>\n" );
1616                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1617                         $this->displayPreviewArea( $previewOutput, false );
1618                 }
1619
1620                 wfProfileOut( $fname );
1621         }
1622
1623         protected function showFormBeforeText() {
1624                 global $wgOut;
1625                 $wgOut->addHTML( "
1626 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
1627 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
1628 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
1629 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
1630         }
1631
1632         protected function showTextbox1( $classes ) {
1633                 $attribs = array( 'tabindex' => 1 );
1634
1635                 if ( $this->wasDeletedSinceLastEdit() )
1636                         $attribs['type'] = 'hidden';
1637                 if ( !empty($classes) )
1638                         $attribs['class'] = implode(' ',$classes);
1639
1640                 $this->showTextbox( $this->textbox1, 'wpTextbox1', $attribs );
1641         }
1642
1643         protected function showTextbox2() {
1644                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6 ) );
1645         }
1646
1647         protected function showTextbox( $content, $name, $attribs = array() ) {
1648                 global $wgOut, $wgUser;
1649
1650                 $wikitext = $this->safeUnicodeOutput( $content );
1651                 if ( $wikitext !== '' ) {
1652                         // Ensure there's a newline at the end, otherwise adding lines
1653                         // is awkward.
1654                         // But don't add a newline if the ext is empty, or Firefox in XHTML
1655                         // mode will show an extra newline. A bit annoying.
1656                         $wikitext .= "\n";
1657                 }
1658
1659                 $attribs['accesskey'] = ',';
1660                 $attribs['id'] = $name;
1661
1662                 if ( $wgUser->getOption( 'editwidth' ) )
1663                         $attribs['style'] = 'width: 100%';
1664
1665                 $wgOut->addHTML( Xml::textarea(
1666                         $name,
1667                         $wikitext,
1668                         $wgUser->getIntOption( 'cols' ), $wgUser->getIntOption( 'rows' ),
1669                         $attribs ) );
1670         }
1671
1672         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
1673                 global $wgOut;
1674                 $classes = array();
1675                 if ( $isOnTop )
1676                         $classes[] = 'ontop';
1677
1678                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
1679
1680                 if ( $this->formtype != 'preview' )
1681                         $attribs['style'] = 'display: none;';
1682
1683                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
1684
1685                 if ( $this->formtype == 'preview' ) {
1686                         $this->showPreview( $previewOutput );
1687                 }
1688
1689                 $wgOut->addHTML( '</div>' );
1690
1691                 if ( $this->formtype == 'diff') {
1692                         $this->showDiff();
1693                 }
1694         }
1695
1696         /**
1697          * Append preview output to $wgOut.
1698          * Includes category rendering if this is a category page.
1699          *
1700          * @param string $text The HTML to be output for the preview.
1701          */
1702         protected function showPreview( $text ) {
1703                 global $wgOut;
1704                 if ( $this->mTitle->getNamespace() == NS_CATEGORY) {
1705                         $this->mArticle->openShowCategory();
1706                 }
1707                 # This hook seems slightly odd here, but makes things more
1708                 # consistent for extensions.
1709                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
1710                 $wgOut->addHTML( $text );
1711                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1712                         $this->mArticle->closeShowCategory();
1713                 }
1714         }
1715
1716         /**
1717          * Live Preview lets us fetch rendered preview page content and
1718          * add it to the page without refreshing the whole page.
1719          * If not supported by the browser it will fall through to the normal form
1720          * submission method.
1721          *
1722          * This function outputs a script tag to support live preview, and
1723          * returns an onclick handler which should be added to the attributes
1724          * of the preview button
1725          */
1726         function doLivePreviewScript() {
1727                 global $wgOut, $wgTitle;
1728                 $wgOut->addScriptFile( 'preview.js' );
1729                 return "";
1730         }
1731
1732         protected function showTosSummary() {
1733                 $msg = 'editpage-tos-summary';
1734                 // Give a chance for site and per-namespace customizations of
1735                 // terms of service summary link that might exist separately
1736                 // from the copyright notice.
1737                 //
1738                 // This will display between the save button and the edit tools,
1739                 // so should remain short!
1740                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
1741                 $text = wfMsg( $msg );
1742                 if( !wfEmptyMsg( $msg, $text ) && $text !== '-' ) {
1743                         global $wgOut;
1744                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
1745                         $wgOut->addWikiMsgArray( $msg, array() );
1746                         $wgOut->addHTML( '</div>' );
1747                 }
1748         }
1749
1750         protected function showEditTools() {
1751                 global $wgOut;
1752                 $wgOut->addHTML( '<div class="mw-editTools">' );
1753                 $wgOut->addWikiMsgArray( 'edittools', array(), array( 'content' ) );
1754                 $wgOut->addHTML( '</div>' );
1755         }
1756
1757         protected function getLastDelete() {
1758                 $dbr = wfGetDB( DB_SLAVE );
1759                 $data = $dbr->selectRow(
1760                         array( 'logging', 'user' ),
1761                         array( 'log_type',
1762                                'log_action',
1763                                'log_timestamp',
1764                                'log_user',
1765                                'log_namespace',
1766                                'log_title',
1767                                'log_comment',
1768                                'log_params',
1769                                'log_deleted',
1770                                'user_name' ),
1771                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1772                                'log_title' => $this->mTitle->getDBkey(),
1773                                'log_type' => 'delete',
1774                                'log_action' => 'delete',
1775                                'user_id=log_user' ),
1776                         __METHOD__,
1777                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
1778                 );
1779                 // Quick paranoid permission checks...
1780                 if( is_object($data) ) {
1781                         if( $data->log_deleted & LogPage::DELETED_USER )
1782                                 $data->user_name = wfMsgHtml('rev-deleted-user');
1783                         if( $data->log_deleted & LogPage::DELETED_COMMENT )
1784                                 $data->log_comment = wfMsgHtml('rev-deleted-comment');
1785                 }
1786                 return $data;
1787         }
1788
1789         /**
1790          * Get the rendered text for previewing.
1791          * @return string
1792          */
1793         function getPreviewText() {
1794                 global $wgOut, $wgUser, $wgTitle, $wgParser, $wgLang, $wgContLang, $wgMessageCache;
1795
1796                 wfProfileIn( __METHOD__ );
1797
1798                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1799                         if ( $this->mTokenOkExceptSuffix ) {
1800                                 $note = wfMsg( 'token_suffix_mismatch' );
1801                         } else {
1802                                 $note = wfMsg( 'session_fail_preview' );
1803                         }
1804                 } else {
1805                         $note = wfMsg( 'previewnote' );
1806                 }
1807
1808                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1809                 $parserOptions->setEditSection( false );
1810                 $parserOptions->setIsPreview( true );
1811                 $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
1812
1813                 global $wgRawHtml;
1814                 if ( $wgRawHtml && !$this->mTokenOk ) {
1815                         // Could be an offsite preview attempt. This is very unsafe if
1816                         // HTML is enabled, as it could be an attack.
1817                         return $wgOut->parse( "<div class='previewnote'>" .
1818                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1819                 }
1820
1821                 # don't parse user css/js, show message about preview
1822                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1823
1824                 if ( $this->isCssJsSubpage ) {
1825                         if (preg_match("/\\.css$/", $this->mTitle->getText() ) ) {
1826                                 $previewtext = wfMsg('usercsspreview');
1827                         } else if (preg_match("/\\.js$/", $this->mTitle->getText() ) ) {
1828                                 $previewtext = wfMsg('userjspreview');
1829                         }
1830                         $parserOptions->setTidy(true);
1831                         $parserOutput = $wgParser->parse( $previewtext, $this->mTitle, $parserOptions );
1832                         $previewHTML = $parserOutput->mText;
1833                 } elseif ( $rt = Title::newFromRedirectArray( $this->textbox1 ) ) {
1834                         $previewHTML = $this->mArticle->viewRedirect( $rt, false );
1835                 } else {
1836                         $toparse = $this->textbox1;
1837
1838                         # If we're adding a comment, we need to show the
1839                         # summary as the headline
1840                         if ( $this->section=="new" && $this->summary!="" ) {
1841                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1842                         }
1843
1844                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData;
1845
1846                         // Parse mediawiki messages with correct target language
1847                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1848                                 list( /* $unused */, $lang ) = $wgMessageCache->figureMessage( $this->mTitle->getText() );
1849                                 $obj = wfGetLangObj( $lang );
1850                                 $parserOptions->setTargetLanguage( $obj );
1851                         }
1852
1853
1854                         $parserOptions->setTidy(true);
1855                         $parserOptions->enableLimitReport();
1856                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ),
1857                                         $this->mTitle, $parserOptions );
1858
1859                         $previewHTML = $parserOutput->getText();
1860                         $this->mParserOutput = $parserOutput;
1861                         $wgOut->addParserOutputNoText( $parserOutput );
1862
1863                         if ( count( $parserOutput->getWarnings() ) ) {
1864                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
1865                         }
1866                 }
1867
1868                 if( $this->isConflict ) {
1869                         $conflict = '<h2 id="mw-previewconflict">' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1870                 } else {
1871                         $conflict = '<hr />';
1872                 }
1873
1874                 $previewhead = "<div class='previewnote'>\n" .
1875                         '<h2 id="mw-previewheader">' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>" .
1876                         $wgOut->parse( $note ) . $conflict . "</div>\n";
1877
1878                 wfProfileOut( __METHOD__ );
1879                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
1880         }
1881
1882         function getTemplates() {
1883                 if ( $this->preview || $this->section != '' ) {
1884                         $templates = array();
1885                         if ( !isset($this->mParserOutput) ) return $templates;
1886                         foreach( $this->mParserOutput->getTemplates() as $ns => $template) {
1887                                 foreach( array_keys( $template ) as $dbk ) {
1888                                         $templates[] = Title::makeTitle($ns, $dbk);
1889                                 }
1890                         }
1891                         return $templates;
1892                 } else {
1893                         return $this->mArticle->getUsedTemplates();
1894                 }
1895         }
1896
1897         /**
1898          * Call the stock "user is blocked" page
1899          */
1900         function blockedPage() {
1901                 global $wgOut, $wgUser;
1902                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
1903
1904                 # If the user made changes, preserve them when showing the markup
1905                 # (This happens when a user is blocked during edit, for instance)
1906                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
1907                 if ( $first ) {
1908                         $source = $this->mTitle->exists() ? $this->getContent() : false;
1909                 } else {
1910                         $source = $this->textbox1;
1911                 }
1912
1913                 # Spit out the source or the user's modified version
1914                 if ( $source !== false ) {
1915                         $rows = $wgUser->getIntOption( 'rows' );
1916                         $cols = $wgUser->getIntOption( 'cols' );
1917                         $attribs = array( 'id' => 'wpTextbox1', 'name' => 'wpTextbox1', 'cols' => $cols, 'rows' => $rows, 'readonly' => 'readonly' );
1918                         $wgOut->addHTML( '<hr />' );
1919                         $wgOut->addWikiMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() );
1920                         # Why we don't use Xml::element here?
1921                         # Is it because if $source is '', it returns <textarea />?
1922                         $wgOut->addHTML( Xml::openElement( 'textarea', $attribs ) . htmlspecialchars( $source ) . Xml::closeElement( 'textarea' ) );
1923                 }
1924         }
1925
1926         /**
1927          * Produce the stock "please login to edit pages" page
1928          */
1929         function userNotLoggedInPage() {
1930                 global $wgUser, $wgOut, $wgTitle;
1931                 $skin = $wgUser->getSkin();
1932
1933                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1934                 $loginLink = $skin->link(
1935                         $loginTitle,
1936                         wfMsgHtml( 'loginreqlink' ),
1937                         array(),
1938                         array( 'returnto' => $wgTitle->getPrefixedText() ),
1939                         array( 'known', 'noclasses' )
1940                 );
1941
1942                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1943                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1944                 $wgOut->setArticleRelated( false );
1945
1946                 $wgOut->addHTML( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
1947                 $wgOut->returnToMain( false, $wgTitle );
1948         }
1949
1950         /**
1951          * Creates a basic error page which informs the user that
1952          * they have attempted to edit a nonexistent section.
1953          */
1954         function noSuchSectionPage() {
1955                 global $wgOut, $wgTitle;
1956
1957                 $wgOut->setPageTitle( wfMsg( 'nosuchsectiontitle' ) );
1958                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1959                 $wgOut->setArticleRelated( false );
1960
1961                 $wgOut->addWikiMsg( 'nosuchsectiontext', $this->section );
1962                 $wgOut->returnToMain( false, $wgTitle );
1963         }
1964
1965         /**
1966          * Produce the stock "your edit contains spam" page
1967          *
1968          * @param $match Text which triggered one or more filters
1969          */
1970         function spamPage( $match = false ) {
1971                 global $wgOut, $wgTitle;
1972
1973                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1974                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1975                 $wgOut->setArticleRelated( false );
1976
1977                 $wgOut->addHTML( '<div id="spamprotected">' );
1978                 $wgOut->addWikiMsg( 'spamprotectiontext' );
1979                 if ( $match )
1980                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
1981                 $wgOut->addHTML( '</div>' );
1982
1983                 $wgOut->returnToMain( false, $wgTitle );
1984         }
1985
1986         /**
1987          * @private
1988          * @todo document
1989          */
1990         function mergeChangesInto( &$editText ){
1991                 $fname = 'EditPage::mergeChangesInto';
1992                 wfProfileIn( $fname );
1993
1994                 $db = wfGetDB( DB_MASTER );
1995
1996                 // This is the revision the editor started from
1997                 $baseRevision = $this->getBaseRevision();
1998                 if ( is_null( $baseRevision ) ) {
1999                         wfProfileOut( $fname );
2000                         return false;
2001                 }
2002                 $baseText = $baseRevision->getText();
2003
2004                 // The current state, we want to merge updates into it
2005                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2006                 if ( is_null( $currentRevision ) ) {
2007                         wfProfileOut( $fname );
2008                         return false;
2009                 }
2010                 $currentText = $currentRevision->getText();
2011
2012                 $result = '';
2013                 if ( wfMerge( $baseText, $editText, $currentText, $result ) ) {
2014                         $editText = $result;
2015                         wfProfileOut( $fname );
2016                         return true;
2017                 } else {
2018                         wfProfileOut( $fname );
2019                         return false;
2020                 }
2021         }
2022
2023         /**
2024          * Check if the browser is on a blacklist of user-agents known to
2025          * mangle UTF-8 data on form submission. Returns true if Unicode
2026          * should make it through, false if it's known to be a problem.
2027          * @return bool
2028          * @private
2029          */
2030         function checkUnicodeCompliantBrowser() {
2031                 global $wgBrowserBlackList;
2032                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
2033                         // No User-Agent header sent? Trust it by default...
2034                         return true;
2035                 }
2036                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
2037                 foreach ( $wgBrowserBlackList as $browser ) {
2038                         if ( preg_match($browser, $currentbrowser) ) {
2039                                 return false;
2040                         }
2041                 }
2042                 return true;
2043         }
2044
2045         /**
2046          * @deprecated use $wgParser->stripSectionName()
2047          */
2048         function pseudoParseSectionAnchor( $text ) {
2049                 global $wgParser;
2050                 return $wgParser->stripSectionName( $text );
2051         }
2052
2053         /**
2054          * Format an anchor fragment as it would appear for a given section name
2055          * @param string $text
2056          * @return string
2057          * @private
2058          */
2059         function sectionAnchor( $text ) {
2060                 global $wgParser;
2061                 return $wgParser->guessSectionNameFromWikiText( $text );
2062         }
2063
2064         /**
2065          * Shows a bulletin board style toolbar for common editing functions.
2066          * It can be disabled in the user preferences.
2067          * The necessary JavaScript code can be found in skins/common/edit.js.
2068          *
2069          * @return string
2070          */
2071         static function getEditToolbar() {
2072                 global $wgStylePath, $wgContLang, $wgLang;
2073
2074                 /**
2075                  * toolarray an array of arrays which each include the filename of
2076                  * the button image (without path), the opening tag, the closing tag,
2077                  * and optionally a sample text that is inserted between the two when no
2078                  * selection is highlighted.
2079                  * The tip text is shown when the user moves the mouse over the button.
2080                  *
2081                  * Already here are accesskeys (key), which are not used yet until someone
2082                  * can figure out a way to make them work in IE. However, we should make
2083                  * sure these keys are not defined on the edit page.
2084                  */
2085                 $toolarray = array(
2086                         array(
2087                                 'image'  => $wgLang->getImageFile('button-bold'),
2088                                 'id'     => 'mw-editbutton-bold',
2089                                 'open'   => '\'\'\'',
2090                                 'close'  => '\'\'\'',
2091                                 'sample' => wfMsg('bold_sample'),
2092                                 'tip'    => wfMsg('bold_tip'),
2093                                 'key'    => 'B'
2094                         ),
2095                         array(
2096                                 'image'  => $wgLang->getImageFile('button-italic'),
2097                                 'id'     => 'mw-editbutton-italic',
2098                                 'open'   => '\'\'',
2099                                 'close'  => '\'\'',
2100                                 'sample' => wfMsg('italic_sample'),
2101                                 'tip'    => wfMsg('italic_tip'),
2102                                 'key'    => 'I'
2103                         ),
2104                         array(
2105                                 'image'  => $wgLang->getImageFile('button-link'),
2106                                 'id'     => 'mw-editbutton-link',
2107                                 'open'   => '[[',
2108                                 'close'  => ']]',
2109                                 'sample' => wfMsg('link_sample'),
2110                                 'tip'    => wfMsg('link_tip'),
2111                                 'key'    => 'L'
2112                         ),
2113                         array(
2114                                 'image'  => $wgLang->getImageFile('button-extlink'),
2115                                 'id'     => 'mw-editbutton-extlink',
2116                                 'open'   => '[',
2117                                 'close'  => ']',
2118                                 'sample' => wfMsg('extlink_sample'),
2119                                 'tip'    => wfMsg('extlink_tip'),
2120                                 'key'    => 'X'
2121                         ),
2122                         array(
2123                                 'image'  => $wgLang->getImageFile('button-headline'),
2124                                 'id'     => 'mw-editbutton-headline',
2125                                 'open'   => "\n== ",
2126                                 'close'  => " ==\n",
2127                                 'sample' => wfMsg('headline_sample'),
2128                                 'tip'    => wfMsg('headline_tip'),
2129                                 'key'    => 'H'
2130                         ),
2131                         array(
2132                                 'image'  => $wgLang->getImageFile('button-image'),
2133                                 'id'     => 'mw-editbutton-image',
2134                                 'open'   => '[['.$wgContLang->getNsText(NS_FILE).':',
2135                                 'close'  => ']]',
2136                                 'sample' => wfMsg('image_sample'),
2137                                 'tip'    => wfMsg('image_tip'),
2138                                 'key'    => 'D'
2139                         ),
2140                         array(
2141                                 'image'  => $wgLang->getImageFile('button-media'),
2142                                 'id'     => 'mw-editbutton-media',
2143                                 'open'   => '[['.$wgContLang->getNsText(NS_MEDIA).':',
2144                                 'close'  => ']]',
2145                                 'sample' => wfMsg('media_sample'),
2146                                 'tip'    => wfMsg('media_tip'),
2147                                 'key'    => 'M'
2148                         ),
2149                         array(
2150                                 'image'  => $wgLang->getImageFile('button-math'),
2151                                 'id'     => 'mw-editbutton-math',
2152                                 'open'   => "<math>",
2153                                 'close'  => "</math>",
2154                                 'sample' => wfMsg('math_sample'),
2155                                 'tip'    => wfMsg('math_tip'),
2156                                 'key'    => 'C'
2157                         ),
2158                         array(
2159                                 'image'  => $wgLang->getImageFile('button-nowiki'),
2160                                 'id'     => 'mw-editbutton-nowiki',
2161                                 'open'   => "<nowiki>",
2162                                 'close'  => "</nowiki>",
2163                                 'sample' => wfMsg('nowiki_sample'),
2164                                 'tip'    => wfMsg('nowiki_tip'),
2165                                 'key'    => 'N'
2166                         ),
2167                         array(
2168                                 'image'  => $wgLang->getImageFile('button-sig'),
2169                                 'id'     => 'mw-editbutton-signature',
2170                                 'open'   => '--~~~~',
2171                                 'close'  => '',
2172                                 'sample' => '',
2173                                 'tip'    => wfMsg('sig_tip'),
2174                                 'key'    => 'Y'
2175                         ),
2176                         array(
2177                                 'image'  => $wgLang->getImageFile('button-hr'),
2178                                 'id'     => 'mw-editbutton-hr',
2179                                 'open'   => "\n----\n",
2180                                 'close'  => '',
2181                                 'sample' => '',
2182                                 'tip'    => wfMsg('hr_tip'),
2183                                 'key'    => 'R'
2184                         )
2185                 );
2186                 $toolbar = "<div id='toolbar'>\n";
2187
2188                 $script = '';
2189                 foreach ( $toolarray as $tool ) {
2190                         $params = array(
2191                                 $image = $wgStylePath.'/common/images/'.$tool['image'],
2192                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
2193                                 // Older browsers show a "speedtip" type message only for ALT.
2194                                 // Ideally these should be different, realistically they
2195                                 // probably don't need to be.
2196                                 $tip = $tool['tip'],
2197                                 $open = $tool['open'],
2198                                 $close = $tool['close'],
2199                                 $sample = $tool['sample'],
2200                                 $cssId = $tool['id'],
2201                         );
2202
2203                         $paramList = implode( ',',
2204                                 array_map( array( 'Xml', 'encodeJsVar' ), $params ) );
2205                         $script .= "addButton($paramList);\n";
2206                 }
2207                 $toolbar .= Html::inlineScript( "\n$script\n" );
2208
2209                 $toolbar .= "\n</div>";
2210
2211                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
2212
2213                 return $toolbar;
2214         }
2215
2216         /**
2217          * Returns an array of html code of the following checkboxes:
2218          * minor and watch
2219          *
2220          * @param $tabindex Current tabindex
2221          * @param $skin Skin object
2222          * @param $checked Array of checkbox => bool, where bool indicates the checked
2223          *                 status of the checkbox
2224          *
2225          * @return array
2226          */
2227         public function getCheckboxes( &$tabindex, $skin, $checked ) {
2228                 global $wgUser;
2229
2230                 $checkboxes = array();
2231
2232                 $checkboxes['minor'] = '';
2233                 $minorLabel = wfMsgExt('minoredit', array('parseinline'));
2234                 if ( $wgUser->isAllowed('minoredit') ) {
2235                         $attribs = array(
2236                                 'tabindex'  => ++$tabindex,
2237                                 'accesskey' => wfMsg( 'accesskey-minoredit' ),
2238                                 'id'        => 'wpMinoredit',
2239                         );
2240                         $checkboxes['minor'] =
2241                                 Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
2242                                 "&nbsp;<label for='wpMinoredit'".$skin->tooltip('minoredit', 'withaccess').">{$minorLabel}</label>";
2243                 }
2244
2245                 $watchLabel = wfMsgExt('watchthis', array('parseinline'));
2246                 $checkboxes['watch'] = '';
2247                 if ( $wgUser->isLoggedIn() ) {
2248                         $attribs = array(
2249                                 'tabindex'  => ++$tabindex,
2250                                 'accesskey' => wfMsg( 'accesskey-watch' ),
2251                                 'id'        => 'wpWatchthis',
2252                         );
2253                         $checkboxes['watch'] =
2254                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
2255                                 "&nbsp;<label for='wpWatchthis'".$skin->tooltip('watch', 'withaccess').">{$watchLabel}</label>";
2256                 }
2257                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
2258                 return $checkboxes;
2259         }
2260
2261         /**
2262          * Returns an array of html code of the following buttons:
2263          * save, diff, preview and live
2264          *
2265          * @param $tabindex Current tabindex
2266          *
2267          * @return array
2268          */
2269         public function getEditButtons(&$tabindex) {
2270                 $buttons = array();
2271
2272                 $temp = array(
2273                         'id'        => 'wpSave',
2274                         'name'      => 'wpSave',
2275                         'type'      => 'submit',
2276                         'tabindex'  => ++$tabindex,
2277                         'value'     => wfMsg('savearticle'),
2278                         'accesskey' => wfMsg('accesskey-save'),
2279                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
2280                 );
2281                 $buttons['save'] = Xml::element('input', $temp, '');
2282
2283                 ++$tabindex; // use the same for preview and live preview
2284                 if ( $this->useLivePreview() ) {
2285                         $this->doLivePreviewScript(); // Add to output
2286
2287                         $temp = array(
2288                                 'id'        => 'wpPreview',
2289                                 'name'      => 'wpPreview',
2290                                 'type'      => 'submit',
2291                                 'tabindex'  => $tabindex,
2292                                 'value'     => wfMsg('showpreview'),
2293                                 'accesskey' => '',
2294                                 'title'     => wfMsg( 'tooltip-preview' ).' ['.wfMsg( 'accesskey-preview' ).']',
2295                         );
2296                         $buttons['preview'] = Xml::element('input', $temp, '');
2297
2298                         $temp = array(
2299                                 'id'        => 'wpLivePreview',
2300                                 'name'      => 'wpLivePreview',
2301                                 'type'      => 'submit',
2302                                 'tabindex'  => $tabindex,
2303                                 'value'     => wfMsg('showlivepreview'),
2304                                 'accesskey' => wfMsg('accesskey-preview'),
2305                                 'title'     => '',
2306                                 'style'     => 'display: none;',
2307                         );
2308
2309                         $buttons['live'] = Xml::element('input', $temp, '');
2310                 } else {
2311                         $temp = array(
2312                                 'id'        => 'wpPreview',
2313                                 'name'      => 'wpPreview',
2314                                 'type'      => 'submit',
2315                                 'tabindex'  => $tabindex,
2316                                 'value'     => wfMsg('showpreview'),
2317                                 'accesskey' => wfMsg('accesskey-preview'),
2318                                 'title'     => wfMsg( 'tooltip-preview' ).' ['.wfMsg( 'accesskey-preview' ).']',
2319                         );
2320                         $buttons['preview'] = Xml::element('input', $temp, '');
2321                         $buttons['live'] = '';
2322                 }
2323
2324                 $temp = array(
2325                         'id'        => 'wpDiff',
2326                         'name'      => 'wpDiff',
2327                         'type'      => 'submit',
2328                         'tabindex'  => ++$tabindex,
2329                         'value'     => wfMsg('showdiff'),
2330                         'accesskey' => wfMsg('accesskey-diff'),
2331                         'title'     => wfMsg( 'tooltip-diff' ).' ['.wfMsg( 'accesskey-diff' ).']',
2332                 );
2333                 $buttons['diff'] = Xml::element('input', $temp, '');
2334
2335                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
2336                 return $buttons;
2337         }
2338
2339         /**
2340          * Whether to use live preview for this page
2341          * This disables live preview when editing css/js user subpages so that the
2342          * user can preview them (bug 3421)
2343          *
2344          * @return Boolean
2345          */
2346         public function useLivePreview() {
2347                 global $wgLivePreview, $wgUser;
2348
2349                 return $wgLivePreview && $wgUser->getOption( 'uselivepreview' ) &&
2350                         !( ( $this->mTitle->isCssSubpage() && $this->mTitle->userCanEditCssSubpage() ) ||
2351                         ( $this->mTitle->isJsSubpage() && $this->mTitle->userCanEditCssSubpage() ) );
2352         }
2353
2354         /**
2355          * Output preview text only. This can be sucked into the edit page
2356          * via JavaScript, and saves the server time rendering the skin as
2357          * well as theoretically being more robust on the client (doesn't
2358          * disturb the edit box's undo history, won't eat your text on
2359          * failure, etc).
2360          *
2361          * @todo This doesn't include category or interlanguage links.
2362          *       Would need to enhance it a bit, <s>maybe wrap them in XML
2363          *       or something...</s> that might also require more skin
2364          *       initialization, so check whether that's a problem.
2365          */
2366         function livePreview() {
2367                 global $wgOut;
2368                 $wgOut->disable();
2369                 header( 'Content-type: text/xml; charset=utf-8' );
2370                 header( 'Cache-control: no-cache' );
2371
2372                 $previewText = $this->getPreviewText();
2373                 #$categories = $skin->getCategoryLinks();
2374
2375                 $s =
2376                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
2377                 Xml::tags( 'livepreview', null,
2378                         Xml::element( 'preview', null, $previewText )
2379                         #.      Xml::element( 'category', null, $categories )
2380                 );
2381                 echo $s;
2382         }
2383
2384
2385         /**
2386          * Get a diff between the current contents of the edit box and the
2387          * version of the page we're editing from.
2388          *
2389          * If this is a section edit, we'll replace the section as for final
2390          * save and then make a comparison.
2391          */
2392         function showDiff() {
2393                 $oldtext = $this->mArticle->fetchContent();
2394                 $newtext = $this->mArticle->replaceSection(
2395                         $this->section, $this->textbox1, $this->summary, $this->edittime );
2396                 $newtext = $this->mArticle->preSaveTransform( $newtext );
2397                 $oldtitle = wfMsgExt( 'currentrev', array('parseinline') );
2398                 $newtitle = wfMsgExt( 'yourtext', array('parseinline') );
2399                 if ( $oldtext !== false  || $newtext != '' ) {
2400                         $de = new DifferenceEngine( $this->mTitle );
2401                         $de->setText( $oldtext, $newtext );
2402                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2403                         $de->showDiffStyle();
2404                 } else {
2405                         $difftext = '';
2406                 }
2407
2408                 global $wgOut;
2409                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2410         }
2411
2412         /**
2413          * Filter an input field through a Unicode de-armoring process if it
2414          * came from an old browser with known broken Unicode editing issues.
2415          *
2416          * @param WebRequest $request
2417          * @param string $field
2418          * @return string
2419          * @private
2420          */
2421         function safeUnicodeInput( $request, $field ) {
2422                 $text = rtrim( $request->getText( $field ) );
2423                 return $request->getBool( 'safemode' )
2424                         ? $this->unmakesafe( $text )
2425                         : $text;
2426         }
2427
2428         /**
2429          * Filter an output field through a Unicode armoring process if it is
2430          * going to an old browser with known broken Unicode editing issues.
2431          *
2432          * @param string $text
2433          * @return string
2434          * @private
2435          */
2436         function safeUnicodeOutput( $text ) {
2437                 global $wgContLang;
2438                 $codedText = $wgContLang->recodeForEdit( $text );
2439                 return $this->checkUnicodeCompliantBrowser()
2440                         ? $codedText
2441                         : $this->makesafe( $codedText );
2442         }
2443
2444         /**
2445          * A number of web browsers are known to corrupt non-ASCII characters
2446          * in a UTF-8 text editing environment. To protect against this,
2447          * detected browsers will be served an armored version of the text,
2448          * with non-ASCII chars converted to numeric HTML character references.
2449          *
2450          * Preexisting such character references will have a 0 added to them
2451          * to ensure that round-trips do not alter the original data.
2452          *
2453          * @param string $invalue
2454          * @return string
2455          * @private
2456          */
2457         function makesafe( $invalue ) {
2458                 // Armor existing references for reversability.
2459                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
2460
2461                 $bytesleft = 0;
2462                 $result = "";
2463                 $working = 0;
2464                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2465                         $bytevalue = ord( $invalue{$i} );
2466                         if ( $bytevalue <= 0x7F ) { //0xxx xxxx
2467                                 $result .= chr( $bytevalue );
2468                                 $bytesleft = 0;
2469                         } elseif ( $bytevalue <= 0xBF ) { //10xx xxxx
2470                                 $working = $working << 6;
2471                                 $working += ($bytevalue & 0x3F);
2472                                 $bytesleft--;
2473                                 if ( $bytesleft <= 0 ) {
2474                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
2475                                 }
2476                         } elseif ( $bytevalue <= 0xDF ) { //110x xxxx
2477                                 $working = $bytevalue & 0x1F;
2478                                 $bytesleft = 1;
2479                         } elseif ( $bytevalue <= 0xEF ) { //1110 xxxx
2480                                 $working = $bytevalue & 0x0F;
2481                                 $bytesleft = 2;
2482                         } else { //1111 0xxx
2483                                 $working = $bytevalue & 0x07;
2484                                 $bytesleft = 3;
2485                         }
2486                 }
2487                 return $result;
2488         }
2489
2490         /**
2491          * Reverse the previously applied transliteration of non-ASCII characters
2492          * back to UTF-8. Used to protect data from corruption by broken web browsers
2493          * as listed in $wgBrowserBlackList.
2494          *
2495          * @param string $invalue
2496          * @return string
2497          * @private
2498          */
2499         function unmakesafe( $invalue ) {
2500                 $result = "";
2501                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2502                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
2503                                 $i += 3;
2504                                 $hexstring = "";
2505                                 do {
2506                                         $hexstring .= $invalue{$i};
2507                                         $i++;
2508                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
2509
2510                                 // Do some sanity checks. These aren't needed for reversability,
2511                                 // but should help keep the breakage down if the editor
2512                                 // breaks one of the entities whilst editing.
2513                                 if ( (substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6) ) {
2514                                         $codepoint = hexdec($hexstring);
2515                                         $result .= codepointToUtf8( $codepoint );
2516                                 } else {
2517                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
2518                                 }
2519                         } else {
2520                                 $result .= substr( $invalue, $i, 1 );
2521                         }
2522                 }
2523                 // reverse the transform that we made for reversability reasons.
2524                 return strtr( $result, array( "&#x0" => "&#x" ) );
2525         }
2526
2527         function noCreatePermission() {
2528                 global $wgOut;
2529                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
2530                 $wgOut->addWikiMsg( 'nocreatetext' );
2531         }
2532
2533         /**
2534          * Attempt submission
2535          * @return bool false if output is done, true if the rest of the form should be displayed
2536          */
2537         function attemptSave() {
2538                 global $wgUser, $wgOut, $wgTitle, $wgRequest;
2539
2540                 $resultDetails = false;
2541                 # Allow bots to exempt some edits from bot flagging
2542                 $bot = $wgUser->isAllowed('bot') && $wgRequest->getBool('bot',true);
2543                 $value = $this->internalAttemptSave( $resultDetails, $bot );
2544
2545                 if ( $value == self::AS_SUCCESS_UPDATE || $value == self::AS_SUCCESS_NEW_ARTICLE ) {
2546                         $this->didSave = true;
2547                 }
2548
2549                 switch ($value) {
2550                         case self::AS_HOOK_ERROR_EXPECTED:
2551                         case self::AS_CONTENT_TOO_BIG:
2552                         case self::AS_ARTICLE_WAS_DELETED:
2553                         case self::AS_CONFLICT_DETECTED:
2554                         case self::AS_SUMMARY_NEEDED:
2555                         case self::AS_TEXTBOX_EMPTY:
2556                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
2557                         case self::AS_END:
2558                                 return true;
2559
2560                         case self::AS_HOOK_ERROR:
2561                         case self::AS_FILTERING:
2562                         case self::AS_SUCCESS_NEW_ARTICLE:
2563                         case self::AS_SUCCESS_UPDATE:
2564                                 return false;
2565
2566                         case self::AS_SPAM_ERROR:
2567                                 $this->spamPage ( $resultDetails['spam'] );
2568                                 return false;
2569
2570                         case self::AS_BLOCKED_PAGE_FOR_USER:
2571                                 $this->blockedPage();
2572                                 return false;
2573
2574                         case self::AS_IMAGE_REDIRECT_ANON:
2575                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
2576                                 return false;
2577
2578                         case self::AS_READ_ONLY_PAGE_ANON:
2579                                 $this->userNotLoggedInPage();
2580                                 return false;
2581
2582                         case self::AS_READ_ONLY_PAGE_LOGGED:
2583                         case self::AS_READ_ONLY_PAGE:
2584                                 $wgOut->readOnlyPage();
2585                                 return false;
2586
2587                         case self::AS_RATE_LIMITED:
2588                                 $wgOut->rateLimited();
2589                                 return false;
2590
2591                         case self::AS_NO_CREATE_PERMISSION;
2592                                 $this->noCreatePermission();
2593                                 return;
2594
2595                         case self::AS_BLANK_ARTICLE:
2596                                 $wgOut->redirect( $wgTitle->getFullURL() );
2597                                 return false;
2598
2599                         case self::AS_IMAGE_REDIRECT_LOGGED:
2600                                 $wgOut->permissionRequired( 'upload' );
2601                                 return false;
2602                 }
2603         }
2604
2605         function getBaseRevision() {
2606                 if ( $this->mBaseRevision == false ) {
2607                         $db = wfGetDB( DB_MASTER );
2608                         $baseRevision = Revision::loadFromTimestamp(
2609                                 $db, $this->mTitle, $this->edittime );
2610                         return $this->mBaseRevision = $baseRevision;
2611                 } else {
2612                         return $this->mBaseRevision;
2613                 }
2614         }
2615 }