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         var $mShowSummaryField = true;
  71
  72         # Form values
  73         var $save = false, $preview = false, $diff = false;
  74         var $minoredit = false, $watchthis = false, $recreate = false;
  75         var $textbox1 = '', $textbox2 = '', $summary = '', $nosummary = false;
  76         var $edittime = '', $section = '', $starttime = '';
  77         var $oldid = 0, $editintro = '', $scrolltop = null, $bot = true;
  78
  79         # Placeholders for text injection by hooks (must be HTML)
  80         # extensions should take care to _append_ to the present value
  81         public $editFormPageTop; // Before even the preview
  82         public $editFormTextTop;
  83         public $editFormTextBeforeContent;
  84         public $editFormTextAfterWarn;
  85         public $editFormTextAfterTools;
  86         public $editFormTextBottom;
  87         public $editFormTextAfterContent;
  88         public $previewTextAfterContent;
  89
  90         /* $didSave should be set to true whenever an article was succesfully altered. */
  91         public $didSave = false;
  92         public $undidRev = 0;
  93
  94         public $suppressIntro = false;
  95
  96         /**
  97          * @todo document
  98          * @param $article
  99          */
 100         function EditPage( $article ) {
 101                 $this->mArticle =& $article;
 102                 $this->mTitle = $article->getTitle();
 103                 $this->action = 'submit';
 104
 105                 # Placeholders for text injection by hooks (empty per default)
 106                 $this->editFormPageTop =
 107                 $this->editFormTextTop =
 108                 $this->editFormTextBeforeContent =
 109                 $this->editFormTextAfterWarn =
 110                 $this->editFormTextAfterTools =
 111                 $this->editFormTextBottom =
 112                 $this->editFormTextAfterContent =
 113                 $this->previewTextAfterContent =
 114                 $this->mPreloadText = "";
 115         }
 116
 117         function getArticle() {
 118                 return $this->mArticle;
 119         }
 120
 121
 122         /**
 123          * Fetch initial editing page content.
 124          * @private
 125          */
 126         function getContent( $def_text = '' ) {
 127                 global $wgOut, $wgRequest, $wgParser, $wgContLang, $wgMessageCache;
 128
 129                 wfProfileIn( __METHOD__ );
 130                 # Get variables from query string :P
 131                 $section = $wgRequest->getVal( 'section' );
 132                 $preload = $wgRequest->getVal( 'preload' );
 133                 $undoafter = $wgRequest->getVal( 'undoafter' );
 134                 $undo = $wgRequest->getVal( 'undo' );
 135
 136                 $text = '';
 137                 // For message page not locally set, use the i18n message.
 138                 // For other non-existent articles, use preload text if any.
 139                 if ( !$this->mTitle->exists() ) {
 140                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 141                                 # If this is a system message, get the default text.
 142                                 list( $message, $lang ) = $wgMessageCache->figureMessage( $wgContLang->lcfirst( $this->mTitle->getText() ) );
 143                                 $wgMessageCache->loadAllMessages( $lang );
 144                                 $text = wfMsgGetKey( $message, false, $lang, false );
 145                                 if( wfEmptyMsg( $message, $text ) )
 146                                         $text = $this->getPreloadedText( $preload );
 147                         } else {
 148                                 # If requested, preload some text.
 149                                 $text = $this->getPreloadedText( $preload );
 150                         }
 151                 // For existing pages, get text based on "undo" or section parameters.
 152                 } else {
 153                         $text = $this->mArticle->getContent();
 154                         if ( $undo > 0 && $undoafter > 0 && $undo < $undoafter ) {
 155                                 # If they got undoafter and undo round the wrong way, switch them
 156                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 157                         }
 158                         if ( $undo > 0 && $undo > $undoafter ) {
 159                                 # Undoing a specific edit overrides section editing; section-editing
 160                                 # doesn't work with undoing.
 161                                 if ( $undoafter ) {
 162                                         $undorev = Revision::newFromId( $undo );
 163                                         $oldrev = Revision::newFromId( $undoafter );
 164                                 } else {
 165                                         $undorev = Revision::newFromId( $undo );
 166                                         $oldrev = $undorev ? $undorev->getPrevious() : null;
 167                                 }
 168
 169                                 # Sanity check, make sure it's the right page,
 170                                 # the revisions exist and they were not deleted.
 171                                 # Otherwise, $text will be left as-is.
 172                                 if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 173                                         $undorev->getPage() == $oldrev->getPage() &&
 174                                         $undorev->getPage() == $this->mArticle->getID() &&
 175                                         !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 176                                         !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 177
 178                                         $undotext = $this->mArticle->getUndoText( $undorev, $oldrev );
 179                                         if ( $undotext === false ) {
 180                                                 # Warn the user that something went wrong
 181                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-failure">' . wfMsgNoTrans( 'undo-failure' ) . '</div>' );
 182                                         } else {
 183                                                 $text = $undotext;
 184                                                 # Inform the user of our success and set an automatic edit summary
 185                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="mw-undo-success">' . wfMsgNoTrans( 'undo-success' ) . '</div>' );
 186                                                 $firstrev = $oldrev->getNext();
 187                                                 # If we just undid one rev, use an autosummary
 188                                                 if ( $firstrev->mId == $undo ) {
 189                                                         $this->summary = wfMsgForContent( 'undo-summary', $undo, $undorev->getUserText() );
 190                                                         $this->undidRev = $undo;
 191                                                 }
 192                                                 $this->formtype = 'diff';
 193                                         }
 194                                 } else {
 195                                         // Failed basic sanity checks.
 196                                         // Older revisions may have been removed since the link
 197                                         // was created, or we may simply have got bogus input.
 198                                         $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-norev">' . wfMsgNoTrans( 'undo-norev' ) . '</div>' );
 199                                 }
 200                         } else if ( $section != '' ) {
 201                                 if ( $section == 'new' ) {
 202                                         $text = $this->getPreloadedText( $preload );
 203                                 } else {
 204                                         $text = $wgParser->getSection( $text, $section, $def_text );
 205                                 }
 206                         }
 207                 }
 208
 209                 wfProfileOut( __METHOD__ );
 210                 return $text;
 211         }
 212
 213         /** Use this method before edit() to preload some text into the edit box */
 214         public function setPreloadedText( $text ) {
 215                 $this->mPreloadText = $text;
 216         }
 217
 218         /**
 219          * Get the contents of a page from its title and remove includeonly tags
 220          *
 221          * @param $preload String: the title of the page.
 222          * @return string The contents of the page.
 223          */
 224         protected function getPreloadedText( $preload ) {
 225                 if ( !empty( $this->mPreloadText ) ) {
 226                         return $this->mPreloadText;
 227                 } elseif ( $preload === '' ) {
 228                         return '';
 229                 } else {
 230                         $preloadTitle = Title::newFromText( $preload );
 231                         if ( isset( $preloadTitle ) && $preloadTitle->userCanRead() ) {
 232                                 $rev = Revision::newFromTitle( $preloadTitle );
 233                                 if ( is_object( $rev ) ) {
 234                                         $text = $rev->getText();
 235                                         // TODO FIXME: AAAAAAAAAAA, this shouldn't be implementing
 236                                         // its own mini-parser! -ævar
 237                                         $text = preg_replace( '~</?includeonly>~', '', $text );
 238                                         return $text;
 239                                 } else
 240                                         return '';
 241                         }
 242                 }
 243         }
 244
 245         /**
 246          * This is the function that extracts metadata from the article body on the first view.
 247          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
 248          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
 249          */
 250         function extractMetaDataFromArticle () {
 251                 global $wgUseMetadataEdit, $wgMetadataWhitelist, $wgContLang;
 252                 $this->mMetaData = '';
 253                 if ( !$wgUseMetadataEdit ) return;
 254                 if ( $wgMetadataWhitelist == '' ) return;
 255                 $s = '';
 256                 $t = $this->getContent();
 257
 258                 # MISSING : <nowiki> filtering
 259
 260                 # Categories and language links
 261                 $t = explode( "\n" , $t );
 262                 $catlow = strtolower( $wgContLang->getNsText( NS_CATEGORY ) );
 263                 $cat = $ll = array();
 264                 foreach ( $t as $key => $x ) {
 265                         $y = trim( strtolower ( $x ) );
 266                         while ( substr( $y , 0 , 2 ) == '[[' ) {
 267                                 $y = explode( ']]' , trim ( $x ) );
 268                                 $first = array_shift( $y );
 269                                 $first = explode( ':' , $first );
 270                                 $ns = array_shift( $first );
 271                                 $ns = trim( str_replace( '[' , '' , $ns ) );
 272                                 if ( $wgContLang->getLanguageName( $ns ) || strtolower( $ns ) == $catlow ) {
 273                                         $add = '[[' . $ns . ':' . implode( ':' , $first ) . ']]';
 274                                         if ( strtolower( $ns ) == $catlow ) $cat[] = $add;
 275                                         else $ll[] = $add;
 276                                         $x = implode( ']]', $y );
 277                                         $t[$key] = $x;
 278                                         $y = trim( strtolower( $x ) );
 279                                 } else {
 280                                         $x = implode( ']]' , $y );
 281                                         $y = trim( strtolower( $x ) );
 282                                 }
 283                         }
 284                 }
 285                 if ( count( $cat ) ) $s .= implode( ' ' , $cat ) . "\n";
 286                 if ( count( $ll ) ) $s .= implode( ' ' , $ll ) . "\n";
 287                 $t = implode( "\n" , $t );
 288
 289                 # Load whitelist
 290                 $sat = array () ; # stand-alone-templates; must be lowercase
 291                 $wl_title = Title::newFromText( $wgMetadataWhitelist );
 292                 $wl_article = new Article ( $wl_title );
 293                 $wl = explode ( "\n" , $wl_article->getContent() );
 294                 foreach ( $wl AS $x ) {
 295                         $isentry = false;
 296                         $x = trim ( $x );
 297                         while ( substr ( $x , 0 , 1 ) == '*' ) {
 298                                 $isentry = true;
 299                                 $x = trim ( substr ( $x , 1 ) );
 300                         }
 301                         if ( $isentry ) {
 302                                 $sat[] = strtolower ( $x );
 303                         }
 304
 305                 }
 306
 307                 # Templates, but only some
 308                 $t = explode( '{{' , $t );
 309                 $tl = array() ;
 310                 foreach ( $t as $key => $x ) {
 311                         $y = explode( '}}' , $x , 2 );
 312                         if ( count( $y ) == 2 ) {
 313                                 $z = $y[0];
 314                                 $z = explode( '|' , $z );
 315                                 $tn = array_shift( $z );
 316                                 if ( in_array( strtolower( $tn ) , $sat ) ) {
 317                                         $tl[] = '{{' . $y[0] . '}}';
 318                                         $t[$key] = $y[1];
 319                                         $y = explode( '}}' , $y[1] , 2 );
 320                                 }
 321                                 else $t[$key] = '{{' . $x;
 322                         }
 323                         else if ( $key != 0 ) $t[$key] = '{{' . $x;
 324                         else $t[$key] = $x;
 325                 }
 326                 if ( count( $tl ) ) $s .= implode( ' ' , $tl );
 327                 $t = implode( '' , $t );
 328
 329                 $t = str_replace( "\n\n\n", "\n", $t );
 330                 $this->mArticle->mContent = $t;
 331                 $this->mMetaData = $s;
 332         }
 333
 334         /*
 335          * Check if a page was deleted while the user was editing it, before submit.
 336          * Note that we rely on the logging table, which hasn't been always there,
 337          * but that doesn't matter, because this only applies to brand new
 338          * deletes.
 339          */
 340         protected function wasDeletedSinceLastEdit() {
 341                 if ( $this->deletedSinceEdit )
 342                         return true;
 343                 if ( $this->mTitle->isDeletedQuick() ) {
 344                         $this->lastDelete = $this->getLastDelete();
 345                         if ( $this->lastDelete ) {
 346                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
 347                                 if ( $deleteTime > $this->starttime ) {
 348                                         $this->deletedSinceEdit = true;
 349                                 }
 350                         }
 351                 }
 352                 return $this->deletedSinceEdit;
 353         }
 354
 355         function submit() {
 356                 $this->edit();
 357         }
 358
 359         /**
 360          * This is the function that gets called for "action=edit". It
 361          * sets up various member variables, then passes execution to
 362          * another function, usually showEditForm()
 363          *
 364          * The edit form is self-submitting, so that when things like
 365          * preview and edit conflicts occur, we get the same form back
 366          * with the extra stuff added.  Only when the final submission
 367          * is made and all is well do we actually save and redirect to
 368          * the newly-edited page.
 369          */
 370         function edit() {
 371                 global $wgOut, $wgRequest;
 372                 // Allow extensions to modify/prevent this form or submission
 373                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 374                         return;
 375                 }
 376
 377                 wfProfileIn( __METHOD__ );
 378                 wfDebug( __METHOD__.": enter\n" );
 379
 380                 // This is not an article
 381                 $wgOut->setArticleFlag( false );
 382
 383                 $this->importFormData( $wgRequest );
 384                 $this->firsttime = false;
 385
 386                 if ( $this->live ) {
 387                         $this->livePreview();
 388                         wfProfileOut( __METHOD__ );
 389                         return;
 390                 }
 391
 392                 if ( wfReadOnly() && $this->save ) {
 393                         // Force preview
 394                         $this->save = false;
 395                         $this->preview = true;
 396                 }
 397
 398                 $wgOut->addScriptFile( 'edit.js' );
 399
 400                 $permErrors = $this->getEditPermissionErrors();
 401                 if ( $permErrors ) {
 402                         wfDebug( __METHOD__ . ": User can't edit\n" );
 403                         $this->readOnlyPage( $this->getContent(), true, $permErrors, 'edit' );
 404                         wfProfileOut( __METHOD__ );
 405                         return;
 406                 } else {
 407                         if ( $this->save ) {
 408                                 $this->formtype = 'save';
 409                         } else if ( $this->preview ) {
 410                                 $this->formtype = 'preview';
 411                         } else if ( $this->diff ) {
 412                                 $this->formtype = 'diff';
 413                         } else { # First time through
 414                                 $this->firsttime = true;
 415                                 if ( $this->previewOnOpen() ) {
 416                                         $this->formtype = 'preview';
 417                                 } else {
 418                                         $this->extractMetaDataFromArticle () ;
 419                                         $this->formtype = 'initial';
 420                                 }
 421                         }
 422                 }
 423
 424                 // If they used redlink=1 and the page exists, redirect to the main article
 425                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 426                         $wgOut->redirect( $this->mTitle->getFullURL() );
 427                 }
 428
 429                 wfProfileIn( __METHOD__."-business-end" );
 430
 431                 $this->isConflict = false;
 432                 // css / js subpages of user pages get a special treatment
 433                 $this->isCssJsSubpage      = $this->mTitle->isCssJsSubpage();
 434                 $this->isCssSubpage        = $this->mTitle->isCssSubpage();
 435                 $this->isJsSubpage         = $this->mTitle->isJsSubpage();
 436                 $this->isValidCssJsSubpage = $this->mTitle->isValidCssJsSubpage();
 437
 438                 # Show applicable editing introductions
 439                 if ( $this->formtype == 'initial' || $this->firsttime )
 440                         $this->showIntro();
 441
 442                 if ( $this->mTitle->isTalkPage() ) {
 443                         $wgOut->addWikiMsg( 'talkpagetext' );
 444                 }
 445
 446                 # Optional notices on a per-namespace and per-page basis
 447                 $editnotice_ns   = 'editnotice-'.$this->mTitle->getNamespace();
 448                 if ( !wfEmptyMsg( $editnotice_ns, wfMsgForContent( $editnotice_ns ) ) ) {
 449                         $wgOut->addWikiText( wfMsgForContent( $editnotice_ns )  );
 450                 }
 451                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
 452                         $parts = explode( '/', $this->mTitle->getDBkey() );
 453                         $editnotice_base = $editnotice_ns;
 454                         while ( count( $parts ) > 0 ) {
 455                                 $editnotice_base .= '-'.array_shift( $parts );
 456                                 if ( !wfEmptyMsg( $editnotice_base, wfMsgForContent( $editnotice_base ) ) ) {
 457                                         $wgOut->addWikiText( wfMsgForContent( $editnotice_base )  );
 458                                 }
 459                         }
 460                 }
 461
 462                 # Attempt submission here.  This will check for edit conflicts,
 463                 # and redundantly check for locked database, blocked IPs, etc.
 464                 # that edit() already checked just in case someone tries to sneak
 465                 # in the back door with a hand-edited submission URL.
 466
 467                 if ( 'save' == $this->formtype ) {
 468                         if ( !$this->attemptSave() ) {
 469                                 wfProfileOut( __METHOD__."-business-end" );
 470                                 wfProfileOut( __METHOD__ );
 471                                 return;
 472                         }
 473                 }
 474
 475                 # First time through: get contents, set time for conflict
 476                 # checking, etc.
 477                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 478                         if ( $this->initialiseForm() === false ) {
 479                                 $this->noSuchSectionPage();
 480                                 wfProfileOut( __METHOD__."-business-end" );
 481                                 wfProfileOut( __METHOD__ );
 482                                 return;
 483                         }
 484                         if ( !$this->mTitle->getArticleId() )
 485                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 486                 }
 487
 488                 $this->showEditForm();
 489                 wfProfileOut( __METHOD__."-business-end" );
 490                 wfProfileOut( __METHOD__ );
 491         }
 492
 493         protected function getEditPermissionErrors() {
 494                 global $wgUser;
 495                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 496                 # Can this title be created?
 497                 if ( !$this->mTitle->exists() ) {
 498                         $permErrors = array_merge( $permErrors,
 499                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 500                 }
 501                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 502                 $remove = array();
 503                 foreach( $permErrors as $error ) {
 504                         if ( ( $this->preview || $this->diff ) &&
 505                                 ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' ) )
 506                         {
 507                                 $remove[] = $error;
 508                         }
 509                 }
 510                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 511                 return $permErrors;
 512         }
 513
 514         /**
 515          * Show a read-only error
 516          * Parameters are the same as OutputPage:readOnlyPage()
 517          * Redirect to the article page if redlink=1
 518          */
 519         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 520                 global $wgRequest, $wgOut;
 521                 if ( $wgRequest->getBool( 'redlink' ) ) {
 522                         // The edit page was reached via a red link.
 523                         // Redirect to the article page and let them click the edit tab if
 524                         // they really want a permission error.
 525                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 526                 } else {
 527                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 528                 }
 529         }
 530
 531         /**
 532          * Should we show a preview when the edit form is first shown?
 533          *
 534          * @return bool
 535          */
 536         protected function previewOnOpen() {
 537                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 538                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 539                         // Explicit override from request
 540                         return true;
 541                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 542                         // Explicit override from request
 543                         return false;
 544                 } elseif ( $this->section == 'new' ) {
 545                         // Nothing *to* preview for new sections
 546                         return false;
 547                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 548                         // Standard preference behaviour
 549                         return true;
 550                 } elseif ( !$this->mTitle->exists() &&
 551                   isset($wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]) &&
 552                   $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 553                 {
 554                         // Categories are special
 555                         return true;
 556                 } else {
 557                         return false;
 558                 }
 559         }
 560
 561         /**
 562          * Does this EditPage class support section editing?
 563          * This is used by EditPage subclasses to indicate their ui cannot handle section edits
 564          *
 565          * @return bool
 566          */
 567         protected function isSectionEditSupported() {
 568                 return true;
 569         }
 570
 571         /**
 572          * Returns the URL to use in the form's action attribute.
 573          * This is used by EditPage subclasses when simply customizing the action
 574          * variable in the constructor is not enough. This can be used when the
 575          * EditPage lives inside of a Special page rather than a custom page action.
 576          *
 577          * @param Title $title The title for which is being edited (where we go to for &action= links)
 578          * @return string
 579          */
 580         protected function getActionURL( Title $title ) {
 581                 return $title->getLocalURL( array( 'action' => $this->action ) );
 582         }
 583
 584         /**
 585          * @todo document
 586          * @param $request
 587          */
 588         function importFormData( &$request ) {
 589                 global $wgLang, $wgUser;
 590
 591                 wfProfileIn( __METHOD__ );
 592
 593                 # Section edit can come from either the form or a link
 594                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 595
 596                 if ( $request->wasPosted() ) {
 597                         # These fields need to be checked for encoding.
 598                         # Also remove trailing whitespace, but don't remove _initial_
 599                         # whitespace from the text boxes. This may be significant formatting.
 600                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 601                         if ( !$request->getCheck('wpTextbox2') ) {
 602                                 // Skip this if wpTextbox2 has input, it indicates that we came
 603                                 // from a conflict page with raw page text, not a custom form
 604                                 // modified by subclasses
 605                                 wfProfileIn( get_class($this)."::importContentFormData" );
 606                                 $textbox1 = $this->importContentFormData( $request );
 607                                 if ( isset($textbox1) )
 608                                         $this->textbox1 = $textbox1;
 609                                 wfProfileOut( get_class($this)."::importContentFormData" );
 610                         }
 611                         $this->mMetaData = rtrim( $request->getText( 'metadata' ) );
 612                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 613                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary' ), 250, '' );
 614
 615                         # Remove extra headings from summaries and new sections.
 616                         $this->summary = preg_replace('/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary);
 617
 618                         $this->edittime = $request->getVal( 'wpEdittime' );
 619                         $this->starttime = $request->getVal( 'wpStarttime' );
 620
 621                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 622
 623                         if ( is_null( $this->edittime ) ) {
 624                                 # If the form is incomplete, force to preview.
 625                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 626                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 627                                 $this->preview = true;
 628                         } else {
 629                                 /* Fallback for live preview */
 630                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 631                                 $this->diff = $request->getCheck( 'wpDiff' );
 632
 633                                 // Remember whether a save was requested, so we can indicate
 634                                 // if we forced preview due to session failure.
 635                                 $this->mTriedSave = !$this->preview;
 636
 637                                 if ( $this->tokenOk( $request ) ) {
 638                                         # Some browsers will not report any submit button
 639                                         # if the user hits enter in the comment box.
 640                                         # The unmarked state will be assumed to be a save,
 641                                         # if the form seems otherwise complete.
 642                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 643                                 } else if ( $this->diff ) {
 644                                         # Failed token check, but only requested "Show Changes".
 645                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 646                                 } else {
 647                                         # Page might be a hack attempt posted from
 648                                         # an external site. Preview instead of saving.
 649                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 650                                         $this->preview = true;
 651                                 }
 652                         }
 653                         $this->save = !$this->preview && !$this->diff;
 654                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 655                                 $this->edittime = null;
 656                         }
 657
 658                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 659                                 $this->starttime = null;
 660                         }
 661
 662                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 663
 664                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 665                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 666
 667                         # Don't force edit summaries when a user is editing their own user or talk page
 668                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 669                                 $this->mTitle->getText() == $wgUser->getName() )
 670                         {
 671                                 $this->allowBlankSummary = true;
 672                         } else {
 673                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary');
 674                         }
 675
 676                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 677                 } else {
 678                         # Not a posted form? Start with nothing.
 679                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 680                         $this->textbox1  = '';
 681                         $this->mMetaData = '';
 682                         $this->summary   = '';
 683                         $this->edittime  = '';
 684                         $this->starttime = wfTimestampNow();
 685                         $this->edit      = false;
 686                         $this->preview   = false;
 687                         $this->save      = false;
 688                         $this->diff      = false;
 689                         $this->minoredit = false;
 690                         $this->watchthis = $request->getBool( 'watchthis', false ); // Watch may be overriden by request parameters
 691                         $this->recreate  = false;
 692
 693                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 694                                 $this->summary = $request->getVal( 'preloadtitle' );
 695                         }
 696                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 697                                 $this->summary = $request->getText( 'summary' );
 698                         }
 699
 700                         if ( $request->getVal( 'minor' ) ) {
 701                                 $this->minoredit = true;
 702                         }
 703                 }
 704
 705                 $this->bot = $request->getBool( 'bot', true );
 706                 $this->nosummary = $request->getBool( 'nosummary' );
 707
 708                 // FIXME: unused variable?
 709                 $this->oldid = $request->getInt( 'oldid' );
 710
 711                 $this->live = $request->getCheck( 'live' );
 712                 $this->editintro = $request->getText( 'editintro' );
 713
 714                 wfProfileOut( __METHOD__ );
 715
 716                 // Allow extensions to modify form data
 717                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 718         }
 719
 720         /**
 721          * Subpage overridable method for extracting the page content data from the
 722          * posted form to be placed in $this->textbox1, if using customized input
 723          * this method should be overrided and return the page text that will be used
 724          * for saving, preview parsing and so on...
 725          *
 726          * @praram WebRequest $request
 727          */
 728         protected function importContentFormData( &$request ) {
 729                 return; // Don't do anything, EditPage already extracted wpTextbox1
 730         }
 731
 732         /**
 733          * Make sure the form isn't faking a user's credentials.
 734          *
 735          * @param $request WebRequest
 736          * @return bool
 737          * @private
 738          */
 739         function tokenOk( &$request ) {
 740                 global $wgUser;
 741                 $token = $request->getVal( 'wpEditToken' );
 742                 $this->mTokenOk = $wgUser->matchEditToken( $token );
 743                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
 744                 return $this->mTokenOk;
 745         }
 746
 747         /**
 748          * Show all applicable editing introductions
 749          */
 750         protected function showIntro() {
 751                 global $wgOut, $wgUser;
 752                 if ( $this->suppressIntro ) {
 753                         return;
 754                 }
 755
 756                 $namespace = $this->mTitle->getNamespace();
 757
 758                 if ( $namespace == NS_MEDIAWIKI ) {
 759                         # Show a warning if editing an interface message
 760                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1</div>", 'editinginterface' );
 761                 }
 762
 763                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exists
 764                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
 765                         $parts = explode( '/', $this->mTitle->getText(), 2 );
 766                         $username = $parts[0];
 767                         $id = User::idFromName( $username );
 768                         $ip = User::isIP( $username );
 769                         if ( $id == 0 && !$ip ) {
 770                                 $wgOut->wrapWikiMsg( '<div class="mw-userpage-userdoesnotexist error">$1</div>',
 771                                         array( 'userpage-userdoesnotexist', $username ) );
 772                         }
 773                 }
 774                 # Try to add a custom edit intro, or use the standard one if this is not possible.
 775                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
 776                         if ( $wgUser->isLoggedIn() ) {
 777                                 $wgOut->wrapWikiMsg( '<div class="mw-newarticletext">$1</div>', 'newarticletext' );
 778                         } else {
 779                                 $wgOut->wrapWikiMsg( '<div class="mw-newarticletextanon">$1</div>', 'newarticletextanon' );
 780                         }
 781                 }
 782                 # Give a notice if the user is editing a deleted/moved page...
 783                 if ( !$this->mTitle->exists() ) {
 784                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle->getPrefixedText(),
 785                                 '', array( 'lim' => 10,
 786                                            'conds' => array( "log_action != 'revision'" ),
 787                                            'showIfEmpty' => false,
 788                                            'msgKey' => array( 'recreate-moveddeleted-warn') )
 789                         );
 790                 }
 791         }
 792
 793         /**
 794          * Attempt to show a custom editing introduction, if supplied
 795          *
 796          * @return bool
 797          */
 798         protected function showCustomIntro() {
 799                 if ( $this->editintro ) {
 800                         $title = Title::newFromText( $this->editintro );
 801                         if ( $title instanceof Title && $title->exists() && $title->userCanRead() ) {
 802                                 global $wgOut;
 803                                 $revision = Revision::newFromTitle( $title );
 804                                 $wgOut->addWikiTextTitleTidy( $revision->getText(), $this->mTitle );
 805                                 return true;
 806                         } else {
 807                                 return false;
 808                         }
 809                 } else {
 810                         return false;
 811                 }
 812         }
 813
 814         /**
 815          * Attempt submission (no UI)
 816          * @return one of the constants describing the result
 817          */
 818         function internalAttemptSave( &$result, $bot = false ) {
 819                 global $wgFilterCallback, $wgUser, $wgOut, $wgParser;
 820                 global $wgMaxArticleSize;
 821
 822                 wfProfileIn( __METHOD__  );
 823                 wfProfileIn( __METHOD__ . '-checks' );
 824
 825                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) )
 826                 {
 827                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
 828                         return self::AS_HOOK_ERROR;
 829                 }
 830
 831                 # Check image redirect
 832                 if ( $this->mTitle->getNamespace() == NS_FILE &&
 833                         Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
 834                         !$wgUser->isAllowed( 'upload' ) ) {
 835                                 if ( $wgUser->isAnon() ) {
 836                                         return self::AS_IMAGE_REDIRECT_ANON;
 837                                 } else {
 838                                         return self::AS_IMAGE_REDIRECT_LOGGED;
 839                                 }
 840                 }
 841
 842                 # Reintegrate metadata
 843                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 844                 $this->mMetaData = '' ;
 845
 846                 # Check for spam
 847                 $match = self::matchSummarySpamRegex( $this->summary );
 848                 if ( $match === false ) {
 849                         $match = self::matchSpamRegex( $this->textbox1 );
 850                 }
 851                 if ( $match !== false ) {
 852                         $result['spam'] = $match;
 853                         $ip = wfGetIP();
 854                         $pdbk = $this->mTitle->getPrefixedDBkey();
 855                         $match = str_replace( "\n", '', $match );
 856                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
 857                         wfProfileOut( __METHOD__ . '-checks' );
 858                         wfProfileOut( __METHOD__ );
 859                         return self::AS_SPAM_ERROR;
 860                 }
 861                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
 862                         # Error messages or other handling should be performed by the filter function
 863                         wfProfileOut( __METHOD__ . '-checks' );
 864                         wfProfileOut( __METHOD__ );
 865                         return self::AS_FILTERING;
 866                 }
 867                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
 868                         # Error messages etc. could be handled within the hook...
 869                         wfProfileOut( __METHOD__ . '-checks' );
 870                         wfProfileOut( __METHOD__ );
 871                         return self::AS_HOOK_ERROR;
 872                 } elseif ( $this->hookError != '' ) {
 873                         # ...or the hook could be expecting us to produce an error
 874                         wfProfileOut( __METHOD__ . '-checks' );
 875                         wfProfileOut( __METHOD__ );
 876                         return self::AS_HOOK_ERROR_EXPECTED;
 877                 }
 878                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 879                         # Check block state against master, thus 'false'.
 880                         wfProfileOut( __METHOD__ . '-checks' );
 881                         wfProfileOut( __METHOD__ );
 882                         return self::AS_BLOCKED_PAGE_FOR_USER;
 883                 }
 884                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
 885                 if ( $this->kblength > $wgMaxArticleSize ) {
 886                         // Error will be displayed by showEditForm()
 887                         $this->tooBig = true;
 888                         wfProfileOut( __METHOD__ . '-checks' );
 889                         wfProfileOut( __METHOD__ );
 890                         return self::AS_CONTENT_TOO_BIG;
 891                 }
 892
 893                 if ( !$wgUser->isAllowed( 'edit' ) ) {
 894                         if ( $wgUser->isAnon() ) {
 895                                 wfProfileOut( __METHOD__ . '-checks' );
 896                                 wfProfileOut( __METHOD__ );
 897                                 return self::AS_READ_ONLY_PAGE_ANON;
 898                         } else {
 899                                 wfProfileOut( __METHOD__ . '-checks' );
 900                                 wfProfileOut( __METHOD__ );
 901                                 return self::AS_READ_ONLY_PAGE_LOGGED;
 902                         }
 903                 }
 904
 905                 if ( wfReadOnly() ) {
 906                         wfProfileOut( __METHOD__ . '-checks' );
 907                         wfProfileOut( __METHOD__ );
 908                         return self::AS_READ_ONLY_PAGE;
 909                 }
 910                 if ( $wgUser->pingLimiter() ) {
 911                         wfProfileOut( __METHOD__ . '-checks' );
 912                         wfProfileOut( __METHOD__ );
 913                         return self::AS_RATE_LIMITED;
 914                 }
 915
 916                 # If the article has been deleted while editing, don't save it without
 917                 # confirmation
 918                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
 919                         wfProfileOut( __METHOD__ . '-checks' );
 920                         wfProfileOut( __METHOD__ );
 921                         return self::AS_ARTICLE_WAS_DELETED;
 922                 }
 923
 924                 wfProfileOut( __METHOD__ . '-checks' );
 925
 926                 # If article is new, insert it.
 927                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 928                 if ( 0 == $aid ) {
 929                         // Late check for create permission, just in case *PARANOIA*
 930                         if ( !$this->mTitle->userCan( 'create' ) ) {
 931                                 wfDebug( __METHOD__ . ": no create permission\n" );
 932                                 wfProfileOut( __METHOD__ );
 933                                 return self::AS_NO_CREATE_PERMISSION;
 934                         }
 935
 936                         # Don't save a new article if it's blank.
 937                         if ( '' == $this->textbox1 ) {
 938                                 wfProfileOut( __METHOD__ );
 939                                 return self::AS_BLANK_ARTICLE;
 940                         }
 941
 942                         // Run post-section-merge edit filter
 943                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
 944                                 # Error messages etc. could be handled within the hook...
 945                                 wfProfileOut( __METHOD__ );
 946                                 return self::AS_HOOK_ERROR;
 947                         } elseif ( $this->hookError != '' ) {
 948                                 # ...or the hook could be expecting us to produce an error
 949                                 wfProfileOut( __METHOD__ );
 950                                 return self::AS_HOOK_ERROR_EXPECTED;
 951                         }
 952
 953                         # Handle the user preference to force summaries here. Check if it's not a redirect.
 954                         if ( !$this->allowBlankSummary && !Title::newFromRedirect( $this->textbox1 ) ) {
 955                                 if ( md5( $this->summary ) == $this->autoSumm ) {
 956                                         $this->missingSummary = true;
 957                                         wfProfileOut( __METHOD__ );
 958                                         return self::AS_SUMMARY_NEEDED;
 959                                 }
 960                         }
 961
 962                         $isComment = ( $this->section == 'new' );
 963
 964                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 965                                 $this->minoredit, $this->watchthis, false, $isComment, $bot );
 966
 967                         wfProfileOut( __METHOD__ );
 968                         return self::AS_SUCCESS_NEW_ARTICLE;
 969                 }
 970
 971                 # Article exists. Check for edit conflict.
 972
 973                 $this->mArticle->clear(); # Force reload of dates, etc.
 974                 $this->mArticle->forUpdate( true ); # Lock the article
 975
 976                 wfDebug( "timestamp: {$this->mArticle->getTimestamp()}, edittime: {$this->edittime}\n" );
 977
 978                 if ( $this->mArticle->getTimestamp() != $this->edittime ) {
 979                         $this->isConflict = true;
 980                         if ( $this->section == 'new' ) {
 981                                 if ( $this->mArticle->getUserText() == $wgUser->getName() &&
 982                                         $this->mArticle->getComment() == $this->summary ) {
 983                                         // Probably a duplicate submission of a new comment.
 984                                         // This can happen when squid resends a request after
 985                                         // a timeout but the first one actually went through.
 986                                         wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
 987                                 } else {
 988                                         // New comment; suppress conflict.
 989                                         $this->isConflict = false;
 990                                         wfDebug( __METHOD__ .": conflict suppressed; new section\n" );
 991                                 }
 992                         }
 993                 }
 994                 $userid = $wgUser->getId();
 995
 996                 # Suppress edit conflict with self, except for section edits where merging is required.
 997                 if ( $this->isConflict && $this->section == '' && $this->userWasLastToEdit( $userid, $this->edittime ) ) {
 998                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
 999                         $this->isConflict = false;
1000                 }
1001
1002                 if ( $this->isConflict ) {
1003                         wfDebug( __METHOD__ . ": conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
1004                                 $this->mArticle->getTimestamp() . "')\n" );
1005                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime );
1006                 } else {
1007                         wfDebug( __METHOD__ . ": getting section '$this->section'\n" );
1008                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary );
1009                 }
1010                 if ( is_null( $text ) ) {
1011                         wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1012                         $this->isConflict = true;
1013                         $text = $this->textbox1; // do not try to merge here!
1014                 } else if ( $this->isConflict ) {
1015                         # Attempt merge
1016                         if ( $this->mergeChangesInto( $text ) ) {
1017                                 // Successful merge! Maybe we should tell the user the good news?
1018                                 $this->isConflict = false;
1019                                 wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1020                         } else {
1021                                 $this->section = '';
1022                                 $this->textbox1 = $text;
1023                                 wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1024                         }
1025                 }
1026
1027                 if ( $this->isConflict ) {
1028                         wfProfileOut( __METHOD__ );
1029                         return self::AS_CONFLICT_DETECTED;
1030                 }
1031
1032                 $oldtext = $this->mArticle->getContent();
1033
1034                 // Run post-section-merge edit filter
1035                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError, $this->summary ) ) ) {
1036                         # Error messages etc. could be handled within the hook...
1037                         wfProfileOut( __METHOD__ );
1038                         return self::AS_HOOK_ERROR;
1039                 } elseif ( $this->hookError != '' ) {
1040                         # ...or the hook could be expecting us to produce an error
1041                         wfProfileOut( __METHOD__ );
1042                         return self::AS_HOOK_ERROR_EXPECTED;
1043                 }
1044
1045                 # Handle the user preference to force summaries here, but not for null edits
1046                 if ( $this->section != 'new' && !$this->allowBlankSummary && 0 != strcmp( $oldtext, $text )
1047                         && !Title::newFromRedirect( $text ) ) # check if it's not a redirect
1048                 {
1049                         if ( md5( $this->summary ) == $this->autoSumm ) {
1050                                 $this->missingSummary = true;
1051                                 wfProfileOut( __METHOD__ );
1052                                 return self::AS_SUMMARY_NEEDED;
1053                         }
1054                 }
1055
1056                 # And a similar thing for new sections
1057                 if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1058                         if ( trim( $this->summary ) == '' ) {
1059                                 $this->missingSummary = true;
1060                                 wfProfileOut( __METHOD__ );
1061                                 return self::AS_SUMMARY_NEEDED;
1062                         }
1063                 }
1064
1065                 # All's well
1066                 wfProfileIn( __METHOD__ . '-sectionanchor' );
1067                 $sectionanchor = '';
1068                 if ( $this->section == 'new' ) {
1069                         if ( $this->textbox1 == '' ) {
1070                                 $this->missingComment = true;
1071                                 wfProfileOut( __METHOD__ . '-sectionanchor' );
1072                                 wfProfileOut( __METHOD__ );
1073                                 return self::AS_TEXTBOX_EMPTY;
1074                         }
1075                         if ( $this->summary != '' ) {
1076                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $this->summary );
1077                                 # This is a new section, so create a link to the new section
1078                                 # in the revision summary.
1079                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
1080                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1081                         }
1082                 } elseif ( $this->section != '' ) {
1083                         # Try to get a section anchor from the section source, redirect to edited section if header found
1084                         # XXX: might be better to integrate this into Article::replaceSection
1085                         # for duplicate heading checking and maybe parsing
1086                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1087                         # we can't deal with anchors, includes, html etc in the header for now,
1088                         # headline would need to be parsed to improve this
1089                         if ( $hasmatch and strlen( $matches[2] ) > 0 ) {
1090                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $matches[2] );
1091                         }
1092                 }
1093                 wfProfileOut( __METHOD__ . '-sectionanchor' );
1094
1095                 // Save errors may fall down to the edit form, but we've now
1096                 // merged the section into full text. Clear the section field
1097                 // so that later submission of conflict forms won't try to
1098                 // replace that into a duplicated mess.
1099                 $this->textbox1 = $text;
1100                 $this->section = '';
1101
1102                 // Check for length errors again now that the section is merged in
1103                 $this->kblength = (int)( strlen( $text ) / 1024 );
1104                 if ( $this->kblength > $wgMaxArticleSize ) {
1105                         $this->tooBig = true;
1106                         wfProfileOut( __METHOD__ );
1107                         return self::AS_MAX_ARTICLE_SIZE_EXCEEDED;
1108                 }
1109
1110                 # update the article here
1111                 if ( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
1112                         $this->watchthis, $bot, $sectionanchor ) )
1113                 {
1114                         wfProfileOut( __METHOD__ );
1115                         return self::AS_SUCCESS_UPDATE;
1116                 } else {
1117                         $this->isConflict = true;
1118                 }
1119                 wfProfileOut( __METHOD__ );
1120                 return self::AS_END;
1121         }
1122
1123         /**
1124          * Check if no edits were made by other users since
1125          * the time a user started editing the page. Limit to
1126          * 50 revisions for the sake of performance.
1127          */
1128         protected function userWasLastToEdit( $id, $edittime ) {
1129                 if( !$id ) return false;
1130                 $dbw = wfGetDB( DB_MASTER );
1131                 $res = $dbw->select( 'revision',
1132                         'rev_user',
1133                         array(
1134                                 'rev_page' => $this->mArticle->getId(),
1135                                 'rev_timestamp > '.$dbw->addQuotes( $dbw->timestamp($edittime) )
1136                         ),
1137                         __METHOD__,
1138                         array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
1139                 while( $row = $res->fetchObject() ) {
1140                         if( $row->rev_user != $id ) {
1141                                 return false;
1142                         }
1143                 }
1144                 return true;
1145         }
1146
1147         /**
1148          * Check given input text against $wgSpamRegex, and return the text of the first match.
1149          * @return mixed -- matching string or false
1150          */
1151         public static function matchSpamRegex( $text ) {
1152                 global $wgSpamRegex;
1153                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1154                 $regexes = (array)$wgSpamRegex;
1155                 return self::matchSpamRegexInternal( $text, $regexes );
1156         }
1157
1158         /**
1159          * Check given input text against $wgSpamRegex, and return the text of the first match.
1160          * @return mixed -- matching string or false
1161          */
1162         public static function matchSummarySpamRegex( $text ) {
1163                 global $wgSummarySpamRegex;
1164                 $regexes = (array)$wgSummarySpamRegex;
1165                 return self::matchSpamRegexInternal( $text, $regexes );
1166         }
1167
1168         protected static function matchSpamRegexInternal( $text, $regexes ) {
1169                 foreach( $regexes as $regex ) {
1170                         $matches = array();
1171                         if( preg_match( $regex, $text, $matches ) ) {
1172                                 return $matches[0];
1173                         }
1174                 }
1175                 return false;
1176         }
1177
1178         /**
1179          * Initialise form fields in the object
1180          * Called on the first invocation, e.g. when a user clicks an edit link
1181          */
1182         function initialiseForm() {
1183                 global $wgUser;
1184                 $this->edittime = $this->mArticle->getTimestamp();
1185                 $this->textbox1 = $this->getContent( false );
1186                 // activate checkboxes if user wants them to be always active
1187                 # Sort out the "watch" checkbox
1188                 if ( $wgUser->getOption( 'watchdefault' ) ) {
1189                         # Watch all edits
1190                         $this->watchthis = true;
1191                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1192                         # Watch creations
1193                         $this->watchthis = true;
1194                 } elseif ( $this->mTitle->userIsWatching() ) {
1195                         # Already watched
1196                         $this->watchthis = true;
1197                 }
1198                 if ( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
1199                 if ( $this->textbox1 === false ) return false;
1200                 wfProxyCheck();
1201                 return true;
1202         }
1203
1204         function setHeaders() {
1205                 global $wgOut, $wgTitle;
1206                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1207                 if ( $this->formtype == 'preview' ) {
1208                         $wgOut->setPageTitleActionText( wfMsg( 'preview' ) );
1209                 }
1210                 if ( $this->isConflict ) {
1211                         $wgOut->setPageTitle( wfMsg( 'editconflict', $wgTitle->getPrefixedText() ) );
1212                 } elseif ( $this->section != '' ) {
1213                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1214                         $wgOut->setPageTitle( wfMsg( $msg, $wgTitle->getPrefixedText() ) );
1215                 } else {
1216                         # Use the title defined by DISPLAYTITLE magic word when present
1217                         if ( isset( $this->mParserOutput )
1218                          && ( $dt = $this->mParserOutput->getDisplayTitle() ) !== false ) {
1219                                 $title = $dt;
1220                         } else {
1221                                 $title = $wgTitle->getPrefixedText();
1222                         }
1223                         $wgOut->setPageTitle( wfMsg( 'editing', $title ) );
1224                 }
1225         }
1226
1227         /**
1228          * Send the edit form and related headers to $wgOut
1229          * @param $formCallback Optional callable that takes an OutputPage
1230          *                      parameter; will be called during form output
1231          *                      near the top, for captchas and the like.
1232          */
1233         function showEditForm( $formCallback=null ) {
1234                 global $wgOut, $wgUser, $wgTitle;
1235
1236                 # If $wgTitle is null, that means we're in API mode.
1237                 # Some hook probably called this function  without checking
1238                 # for is_null($wgTitle) first. Bail out right here so we don't
1239                 # do lots of work just to discard it right after.
1240                 if ( is_null( $wgTitle ) )
1241                         return;
1242
1243                 wfProfileIn( __METHOD__ );
1244
1245                 $sk = $wgUser->getSkin();
1246
1247                 #need to parse the preview early so that we know which templates are used,
1248                 #otherwise users with "show preview after edit box" will get a blank list
1249                 #we parse this near the beginning so that setHeaders can do the title
1250                 #setting work instead of leaving it in getPreviewText
1251                 $previewOutput = '';
1252                 if ( $this->formtype == 'preview' ) {
1253                         $previewOutput = $this->getPreviewText();
1254                 }
1255
1256                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) );
1257
1258                 $this->setHeaders();
1259
1260                 # Enabled article-related sidebar, toplinks, etc.
1261                 $wgOut->setArticleRelated( true );
1262
1263                 if ( $this->showHeader() === false )
1264                         return;
1265
1266                 $action = htmlspecialchars($this->getActionURL($wgTitle));
1267
1268                 if ( $wgUser->getOption( 'showtoolbar' ) and !$this->isCssJsSubpage ) {
1269                         # prepare toolbar for edit buttons
1270                         $toolbar = EditPage::getEditToolbar();
1271                 } else {
1272                         $toolbar = '';
1273                 }
1274
1275
1276                 $wgOut->addHTML( $this->editFormPageTop );
1277
1278                 if ( $wgUser->getOption( 'previewontop' ) ) {
1279                         $this->displayPreviewArea( $previewOutput, true );
1280                 }
1281
1282                 $wgOut->addHTML( $this->editFormTextTop );
1283
1284                 $templates = $this->getTemplates();
1285                 $formattedtemplates = $sk->formatTemplates( $templates, $this->preview, $this->section != '');
1286
1287                 $hiddencats = $this->mArticle->getHiddenCategories();
1288                 $formattedhiddencats = $sk->formatHiddenCategories( $hiddencats );
1289
1290                 if ( $this->wasDeletedSinceLastEdit() && 'save' != $this->formtype ) {
1291                         $wgOut->wrapWikiMsg(
1292                                 "<div class='error mw-deleted-while-editing'>\n$1</div>",
1293                                 'deletedwhileediting' );
1294                 } elseif ( $this->wasDeletedSinceLastEdit() ) {
1295                         // Hide the toolbar and edit area, user can click preview to get it back
1296                         // Add an confirmation checkbox and explanation.
1297                         $toolbar = '';
1298                         // @todo move this to a cleaner conditional instead of blanking a variable
1299                 }
1300                 $wgOut->addHTML( <<<HTML
1301 {$toolbar}
1302 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1303 HTML
1304 );
1305
1306                 if ( is_callable( $formCallback ) ) {
1307                         call_user_func_array( $formCallback, array( &$wgOut ) );
1308                 }
1309
1310                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1311
1312                 // Put these up at the top to ensure they aren't lost on early form submission
1313                 $this->showFormBeforeText();
1314
1315                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
1316                         $wgOut->addHTML(
1317                                 '<div class="mw-confirm-recreate">' .
1318                                 $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ) ) .
1319                                 Xml::checkLabel( wfMsg( 'recreate' ), 'wpRecreate', 'wpRecreate', false,
1320                                         array( 'title' => $sk->titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
1321                                 ) .
1322                                 '</div>'
1323                         );
1324                 }
1325
1326                 # If a blank edit summary was previously provided, and the appropriate
1327                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1328                 # user being bounced back more than once in the event that a summary
1329                 # is not required.
1330                 #####
1331                 # For a bit more sophisticated detection of blank summaries, hash the
1332                 # automatic one and pass that in the hidden field wpAutoSummary.
1333                 if ( $this->missingSummary ||
1334                         ( $this->section == 'new' && $this->nosummary ) )
1335                                 $wgOut->addHTML( Xml::hidden( 'wpIgnoreBlankSummary', true ) );
1336                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1337                 $wgOut->addHTML( Xml::hidden( 'wpAutoSummary', $autosumm ) );
1338
1339                 if ( $this->section == 'new' ) {
1340                         $this->showSummaryInput( true, $this->summary );
1341                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
1342                 }
1343
1344                 $wgOut->addHTML( $this->editFormTextBeforeContent );
1345
1346                 if ( $this->isConflict ) {
1347                         // In an edit conflict bypass the overrideable content form method
1348                         // and fallback to the raw wpTextbox1 since editconflicts can't be
1349                         // resolved between page source edits and custom ui edits using the
1350                         // custom edit ui.
1351                         $this->showTextbox1();
1352                 } else {
1353                         $this->showContentForm();
1354                 }
1355
1356                 $wgOut->addHTML( $this->editFormTextAfterContent );
1357
1358                 $wgOut->addWikiText( $this->getCopywarn() );
1359                 if ( isset($this->editFormTextAfterWarn) && $this->editFormTextAfterWarn !== '' )
1360                         $wgOut->addHTML( $this->editFormTextAfterWarn );
1361
1362                 global $wgUseMetadataEdit;
1363                 if ( $wgUseMetadataEdit )
1364                         $this->showMetaData();
1365
1366                 $this->showStandardInputs();
1367
1368                 $this->showFormAfterText();
1369
1370                 $this->showTosSummary();
1371                 $this->showEditTools();
1372
1373                 $wgOut->addHTML( <<<HTML
1374 {$this->editFormTextAfterTools}
1375 <div class='templatesUsed'>
1376 {$formattedtemplates}
1377 </div>
1378 <div class='hiddencats'>
1379 {$formattedhiddencats}
1380 </div>
1381 HTML
1382 );
1383
1384                 if ( $this->isConflict )
1385                         $this->showConflict();
1386
1387                 $wgOut->addHTML( $this->editFormTextBottom );
1388                 $wgOut->addHTML( "</form>\n" );
1389                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1390                         $this->displayPreviewArea( $previewOutput, false );
1391                 }
1392
1393                 wfProfileOut( __METHOD__ );
1394         }
1395
1396         protected function showHeader() {
1397                 global $wgOut, $wgParser, $wgUser, $wgTitle, $wgMaxArticleSize, $wgLang;
1398                 if ( $this->isConflict ) {
1399                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1</div>", 'explainconflict' );
1400                         $this->edittime = $this->mArticle->getTimestamp();
1401                 } else {
1402                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
1403                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
1404                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
1405                                 // Someone is welcome to try refactoring though
1406                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
1407                                 return false;
1408                         }
1409
1410                         if ( $this->section != '' && $this->section != 'new' ) {
1411                                 $matches = array();
1412                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
1413                                         preg_match( "/^(=+)(.+)\\1/mi", $this->textbox1, $matches );
1414                                         if ( !empty( $matches[2] ) ) {
1415                                                 global $wgParser;
1416                                                 $this->summary = "/* " .
1417                                                         $wgParser->stripSectionName(trim($matches[2])) .
1418                                                         " */ ";
1419                                         }
1420                                 }
1421                         }
1422
1423                         if ( $this->missingComment ) {
1424                                 $wgOut->wrapWikiMsg( '<div id="mw-missingcommenttext">$1</div>', 'missingcommenttext' );
1425                         }
1426
1427                         if ( $this->missingSummary && $this->section != 'new' ) {
1428                                 $wgOut->wrapWikiMsg( '<div id="mw-missingsummary">$1</div>', 'missingsummary' );
1429                         }
1430
1431                         if ( $this->missingSummary && $this->section == 'new' ) {
1432                                 $wgOut->wrapWikiMsg( '<div id="mw-missingcommentheader">$1</div>', 'missingcommentheader' );
1433                         }
1434
1435                         if ( $this->hookError !== '' ) {
1436                                 $wgOut->addWikiText( $this->hookError );
1437                         }
1438
1439                         if ( !$this->checkUnicodeCompliantBrowser() ) {
1440                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
1441                         }
1442
1443                         if ( isset( $this->mArticle ) && isset( $this->mArticle->mRevision ) ) {
1444                         // Let sysop know that this will make private content public if saved
1445
1446                                 if ( !$this->mArticle->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1447                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", 'rev-deleted-text-permission' );
1448                                 } else if ( $this->mArticle->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1449                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", 'rev-deleted-text-view' );
1450                                 }
1451
1452                                 if ( !$this->mArticle->mRevision->isCurrent() ) {
1453                                         $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
1454                                         $wgOut->addWikiMsg( 'editingold' );
1455                                 }
1456                         }
1457                 }
1458
1459                 if ( wfReadOnly() ) {
1460                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
1461                 } elseif ( $wgUser->isAnon() && $this->formtype != 'preview' ) {
1462                         $wgOut->wrapWikiMsg( '<div id="mw-anon-edit-warning">$1</div>', 'anoneditwarning' );
1463                 } else {
1464                         if ( $this->isCssJsSubpage ) {
1465                                 # Check the skin exists
1466                                 if ( !$this->isValidCssJsSubpage ) {
1467                                         $wgOut->addWikiMsg( 'userinvalidcssjstitle', $wgTitle->getSkinFromCssJsSubpage() );
1468                                 }
1469                                 if ( $this->formtype !== 'preview' ) {
1470                                         if ( $this->isCssSubpage )
1471                                                 $wgOut->addWikiMsg( 'usercssyoucanpreview' );
1472                                         if ( $this->isJsSubpage )
1473                                                 $wgOut->addWikiMsg( 'userjsyoucanpreview' );
1474                                 }
1475                         }
1476                 }
1477
1478                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
1479                         # Is the title semi-protected?
1480                         if ( $this->mTitle->isSemiProtected() ) {
1481                                 $noticeMsg = 'semiprotectedpagewarning';
1482                         } else {
1483                                 # Then it must be protected based on static groups (regular)
1484                                 $noticeMsg = 'protectedpagewarning';
1485                         }
1486                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle->getPrefixedText(), '',
1487                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
1488                 }
1489                 if ( $this->mTitle->isCascadeProtected() ) {
1490                         # Is this page under cascading protection from some source pages?
1491                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1492                         $notice = "<div class='mw-cascadeprotectedwarning'>$1\n";
1493                         $cascadeSourcesCount = count( $cascadeSources );
1494                         if ( $cascadeSourcesCount > 0 ) {
1495                                 # Explain, and list the titles responsible
1496                                 foreach( $cascadeSources as $page ) {
1497                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1498                                 }
1499                         }
1500                         $notice .= '</div>';
1501                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
1502                 }
1503                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
1504                         $wgOut->wrapWikiMsg( '<div class="mw-titleprotectedwarning">$1</div>', 'titleprotectedwarning' );
1505                 }
1506
1507                 if ( $this->kblength === false ) {
1508                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1509                 }
1510
1511                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
1512                         $wgOut->addHTML( "<div class='error' id='mw-edit-longpageerror'>\n" );
1513                         $wgOut->addWikiMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) );
1514                         $wgOut->addHTML( "</div>\n" );
1515                 } elseif ( $this->kblength > 29 ) {
1516                         $wgOut->addHTML( "<div id='mw-edit-longpagewarning'>\n" );
1517                         $wgOut->addWikiMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) );
1518                         $wgOut->addHTML( "</div>\n" );
1519                 }
1520         }
1521
1522         /**
1523          * Standard summary input and label (wgSummary), abstracted so EditPage
1524          * subclasses may reorganize the form.
1525          * Note that you do not need to worry about the label's for=, it will be
1526          * inferred by the id given to the input. You can remove them both by
1527          * passing array( 'id' => false ) to $userInputAttrs.
1528          *
1529          * @param $summary The value of the summary input
1530          * @param $labelText The html to place inside the label
1531          * @param $userInputAttrs An array of attrs to use on the input
1532          * @param $userSpanAttrs An array of attrs to use on the span inside the label
1533          *
1534          * @return array An array in the format array( $label, $input )
1535          */
1536         function getSummaryInput($summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null) {
1537                 $inputAttrs = ( is_array($inputAttrs) ? $inputAttrs : array() ) + array(
1538                         'id' => 'wpSummary',
1539                         'maxlength' => '200',
1540                         'tabindex' => '1',
1541                         'size' => 60,
1542                         'spellcheck' => 'true',
1543                 );
1544
1545                 $spanLabelAttrs = ( is_array($spanLabelAttrs) ? $spanLabelAttrs : array() ) + array(
1546                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
1547                         'id' => "wpSummaryLabel"
1548                 );
1549
1550                 $label = null;
1551                 if ( $labelText ) {
1552                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
1553                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
1554                 }
1555
1556                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
1557
1558                 return array( $label, $input );
1559         }
1560
1561         /**
1562          * @param bool $isSubjectPreview true if this is the section subject/title
1563          *                               up top, or false if this is the comment
1564          *                               summary down below the textarea
1565          * @param string $summary The text of the summary to display
1566          * @return string
1567          */
1568         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
1569                 global $wgOut, $wgContLang;
1570                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
1571                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
1572                 if ( $isSubjectPreview ) {
1573                         if ( $this->nosummary )
1574                                 return;
1575                 } else {
1576                         if ( !$this->mShowSummaryField )
1577                                 return;
1578                 }
1579                 $summary = $wgContLang->recodeForEdit( $summary );
1580                 $labelText = wfMsgExt( $isSubjectPreview ? 'subject' : 'summary', 'parseinline' );
1581                 list($label, $input) = $this->getSummaryInput($summary, $labelText, array( 'class' => $summaryClass ), array());
1582                 $wgOut->addHTML("{$label} {$input}");
1583         }
1584
1585         /**
1586          * @param bool $isSubjectPreview true if this is the section subject/title
1587          *                               up top, or false if this is the comment
1588          *                               summary down below the textarea
1589          * @param string $summary The text of the summary to display
1590          * @return string
1591          */
1592         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
1593                 if ( !$summary || ( !$this->preview && !$this->diff ) )
1594                         return "";
1595
1596                 global $wgParser, $wgUser;
1597                 $sk = $wgUser->getSkin();
1598
1599                 if ( $isSubjectPreview )
1600                         $summary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $summary ) );
1601
1602                 $summary = wfMsgExt( 'subject-preview', 'parseinline' ) . $sk->commentBlock( $summary, $this->mTitle, !!$isSubjectPreview );
1603                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
1604         }
1605
1606         protected function showFormBeforeText() {
1607                 global $wgOut;
1608                 $section = htmlspecialchars( $this->section );
1609                 $wgOut->addHTML( <<<INPUTS
1610 <input type='hidden' value="{$section}" name="wpSection" />
1611 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
1612 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
1613 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
1614
1615 INPUTS
1616                 );
1617                 if ( !$this->checkUnicodeCompliantBrowser() )
1618                         $wgOut->addHTML(Xml::hidden( 'safemode', '1' ));
1619         }
1620
1621         protected function showFormAfterText() {
1622                 global $wgOut, $wgUser;
1623                 /**
1624                  * To make it harder for someone to slip a user a page
1625                  * which submits an edit form to the wiki without their
1626                  * knowledge, a random token is associated with the login
1627                  * session. If it's not passed back with the submission,
1628                  * we won't save the page, or render user JavaScript and
1629                  * CSS previews.
1630                  *
1631                  * For anon editors, who may not have a session, we just
1632                  * include the constant suffix to prevent editing from
1633                  * broken text-mangling proxies.
1634                  */
1635                 $wgOut->addHTML( "\n" . Xml::hidden( "wpEditToken", $wgUser->editToken() ) . "\n" );
1636         }
1637
1638         /**
1639          * Subpage overridable method for printing the form for page content editing
1640          * By default this simply outputs wpTextbox1
1641          * Subclasses can override this to provide a custom UI for editing;
1642          * be it a form, or simply wpTextbox1 with a modified content that will be
1643          * reverse modified when extracted from the post data.
1644          * Note that this is basically the inverse for importContentFormData
1645          *
1646          * @praram WebRequest $request
1647          */
1648         protected function showContentForm() {
1649                 $this->showTextbox1();
1650         }
1651
1652         /**
1653          * Method to output wpTextbox1
1654          * The $textoverride method can be used by subclasses overriding showContentForm
1655          * to pass back to this method.
1656          *
1657          * @param array $customAttribs An array of html attributes to use in the textarea
1658          * @param string $textoverride Optional text to override $this->textarea1 with
1659          */
1660         protected function showTextbox1($customAttribs = null, $textoverride = null) {
1661                 $classes = array(); // Textarea CSS
1662                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
1663                         # Is the title semi-protected?
1664                         if ( $this->mTitle->isSemiProtected() ) {
1665                                 $classes[] = 'mw-textarea-sprotected';
1666                         } else {
1667                                 # Then it must be protected based on static groups (regular)
1668                                 $classes[] = 'mw-textarea-protected';
1669                         }
1670                 }
1671                 $attribs = array( 'tabindex' => 1 );
1672                 if ( is_array($customAttribs) )
1673                         $attribs += $customAttribs;
1674
1675                 if ( $this->wasDeletedSinceLastEdit() )
1676                         $attribs['type'] = 'hidden';
1677                 if ( !empty( $classes ) ) {
1678                         if ( isset($attribs['class']) )
1679                                 $classes[] = $attribs['class'];
1680                         $attribs['class'] = implode( ' ', $classes );
1681                 }
1682
1683                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
1684                 if ( !$this->preview && !$this->diff ) {
1685                         global $wgOut;
1686                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus();' );
1687                 }
1688
1689                 $this->showTextbox( isset($textoverride) ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
1690         }
1691
1692         protected function showTextbox2() {
1693                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6 ) );
1694         }
1695
1696         protected function showTextbox( $content, $name, $customAttribs = array() ) {
1697                 global $wgOut, $wgUser;
1698
1699                 $wikitext = $this->safeUnicodeOutput( $content );
1700                 if ( $wikitext !== '' ) {
1701                         // Ensure there's a newline at the end, otherwise adding lines
1702                         // is awkward.
1703                         // But don't add a newline if the ext is empty, or Firefox in XHTML
1704                         // mode will show an extra newline. A bit annoying.
1705                         $wikitext .= "\n";
1706                 }
1707
1708                 $attribs = $customAttribs + array(
1709                         'accesskey' => ',',
1710                         'id'   => $name,
1711                         'cols' => $wgUser->getIntOption( 'cols' ),
1712                         'rows' => $wgUser->getIntOption( 'rows' ),
1713                         'style' => '' // avoid php notices when appending for editwidth preference (appending allows customAttribs['style'] to still work
1714                 );
1715
1716                 if ( $wgUser->getOption( 'editwidth' ) )
1717                         $attribs['style'] .= 'width: 100%';
1718
1719                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
1720         }
1721
1722         protected function showMetaData() {
1723                 global $wgOut, $wgContLang, $wgUser;
1724                 $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $this->mMetaData ) );
1725                 $ew = $wgUser->getOption( 'editwidth' ) ? ' style="width:100%"' : '';
1726                 $cols = $wgUser->getIntOption( 'cols' );
1727                 $metadata = wfMsgWikiHtml( 'metadata_help' ) . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
1728                 $wgOut->addHTML( $metadata );
1729         }
1730
1731         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
1732                 global $wgOut;
1733                 $classes = array();
1734                 if ( $isOnTop )
1735                         $classes[] = 'ontop';
1736
1737                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
1738
1739                 if ( $this->formtype != 'preview' )
1740                         $attribs['style'] = 'display: none;';
1741
1742                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
1743
1744                 if ( $this->formtype == 'preview' ) {
1745                         $this->showPreview( $previewOutput );
1746                 }
1747
1748                 $wgOut->addHTML( '</div>' );
1749
1750                 if ( $this->formtype == 'diff') {
1751                         $this->showDiff();
1752                 }
1753         }
1754
1755         /**
1756          * Append preview output to $wgOut.
1757          * Includes category rendering if this is a category page.
1758          *
1759          * @param string $text The HTML to be output for the preview.
1760          */
1761         protected function showPreview( $text ) {
1762                 global $wgOut;
1763                 if ( $this->mTitle->getNamespace() == NS_CATEGORY) {
1764                         $this->mArticle->openShowCategory();
1765                 }
1766                 # This hook seems slightly odd here, but makes things more
1767                 # consistent for extensions.
1768                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
1769                 $wgOut->addHTML( $text );
1770                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1771                         $this->mArticle->closeShowCategory();
1772                 }
1773         }
1774
1775         protected function showTosSummary() {
1776                 $msg = 'editpage-tos-summary';
1777                 // Give a chance for site and per-namespace customizations of
1778                 // terms of service summary link that might exist separately
1779                 // from the copyright notice.
1780                 //
1781                 // This will display between the save button and the edit tools,
1782                 // so should remain short!
1783                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
1784                 $text = wfMsg( $msg );
1785                 if( !wfEmptyMsg( $msg, $text ) && $text !== '-' ) {
1786                         global $wgOut;
1787                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
1788                         $wgOut->addWikiMsgArray( $msg, array() );
1789                         $wgOut->addHTML( '</div>' );
1790                 }
1791         }
1792
1793         protected function showEditTools() {
1794                 global $wgOut;
1795                 $wgOut->addHTML( '<div class="mw-editTools">' );
1796                 $wgOut->addWikiMsgArray( 'edittools', array(), array( 'content' ) );
1797                 $wgOut->addHTML( '</div>' );
1798         }
1799
1800         protected function getCopywarn() {
1801                 global $wgRightsText;
1802                 if ( $wgRightsText ) {
1803                         $copywarnMsg = array( 'copyrightwarning',
1804                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
1805                                 $wgRightsText );
1806                 } else {
1807                         $copywarnMsg = array( 'copyrightwarning2',
1808                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
1809                 }
1810                 // Allow for site and per-namespace customization of contribution/copyright notice.
1811                 wfRunHooks( 'EditPageCopyrightWarning', array( $this->mTitle, &$copywarnMsg ) );
1812
1813                 return "<div id=\"editpage-copywarn\">\n" . call_user_func_array("wfMsgNoTrans", $copywarnMsg) . "\n</div>";
1814         }
1815
1816         protected function showStandardInputs( &$tabindex = 2 ) {
1817                 global $wgOut, $wgUser;
1818                 $wgOut->addHTML( "<div class='editOptions'>\n" );
1819
1820                 if ( $this->section != 'new' ) {
1821                         $this->showSummaryInput( false, $this->summary );
1822                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
1823                 }
1824
1825                 $checkboxes = $this->getCheckboxes( $tabindex, $wgUser->getSkin(),
1826                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
1827                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
1828                 $wgOut->addHTML( "<div class='editButtons'>\n" );
1829                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
1830
1831                 $cancel = $this->getCancelLink();
1832                 $separator = wfMsgExt( 'pipe-separator' , 'escapenoentities' );
1833                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ) );
1834                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
1835                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
1836                         htmlspecialchars( wfMsg( 'newwindow' ) );
1837                 $wgOut->addHTML( "      <span class='editHelp'>{$cancel}{$separator}{$edithelp}</span>\n" );
1838                 $wgOut->addHTML( "</div><!-- editButtons -->\n</div><!-- editOptions -->\n" );
1839         }
1840
1841         protected function showConflict() {
1842                 global $wgOut;
1843                 $this->textbox2 = $this->textbox1;
1844                 $this->textbox1 = $this->getContent();
1845                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
1846                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
1847
1848                         $de = new DifferenceEngine( $this->mTitle );
1849                         $de->setText( $this->textbox2, $this->textbox1 );
1850                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1851
1852                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
1853                         $this->showTextbox2();
1854                 }
1855         }
1856
1857         protected function getLastDelete() {
1858                 $dbr = wfGetDB( DB_SLAVE );
1859                 $data = $dbr->selectRow(
1860                         array( 'logging', 'user' ),
1861                         array( 'log_type',
1862                                'log_action',
1863                                'log_timestamp',
1864                                'log_user',
1865                                'log_namespace',
1866                                'log_title',
1867                                'log_comment',
1868                                'log_params',
1869                                'log_deleted',
1870                                'user_name' ),
1871                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1872                                'log_title' => $this->mTitle->getDBkey(),
1873                                'log_type' => 'delete',
1874                                'log_action' => 'delete',
1875                                'user_id=log_user' ),
1876                         __METHOD__,
1877                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
1878                 );
1879                 // Quick paranoid permission checks...
1880                 if( is_object( $data ) ) {
1881                         if( $data->log_deleted & LogPage::DELETED_USER )
1882                                 $data->user_name = wfMsgHtml( 'rev-deleted-user' );
1883                         if( $data->log_deleted & LogPage::DELETED_COMMENT )
1884                                 $data->log_comment = wfMsgHtml( 'rev-deleted-comment' );
1885                 }
1886                 return $data;
1887         }
1888
1889         /**
1890          * Get the rendered text for previewing.
1891          * @return string
1892          */
1893         function getPreviewText() {
1894                 global $wgOut, $wgUser, $wgTitle, $wgParser, $wgLang, $wgContLang, $wgMessageCache;
1895
1896                 wfProfileIn( __METHOD__ );
1897
1898                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1899                         if ( $this->mTokenOkExceptSuffix ) {
1900                                 $note = wfMsg( 'token_suffix_mismatch' );
1901                         } else {
1902                                 $note = wfMsg( 'session_fail_preview' );
1903                         }
1904                 } else {
1905                         $note = wfMsg( 'previewnote' );
1906                 }
1907
1908                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1909                 $parserOptions->setEditSection( false );
1910                 $parserOptions->setIsPreview( true );
1911                 $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
1912
1913                 global $wgRawHtml;
1914                 if ( $wgRawHtml && !$this->mTokenOk ) {
1915                         // Could be an offsite preview attempt. This is very unsafe if
1916                         // HTML is enabled, as it could be an attack.
1917                         return $wgOut->parse( "<div class='previewnote'>" .
1918                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1919                 }
1920
1921                 # don't parse user css/js, show message about preview
1922                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1923
1924                 if ( $this->isCssJsSubpage ) {
1925                         if (preg_match( "/\\.css$/", $this->mTitle->getText() ) ) {
1926                                 $previewtext = wfMsg( 'usercsspreview' );
1927                         } else if (preg_match( "/\\.js$/", $this->mTitle->getText() ) ) {
1928                                 $previewtext = wfMsg( 'userjspreview' );
1929                         }
1930                         $parserOptions->setTidy( true );
1931                         $parserOutput = $wgParser->parse( $previewtext, $this->mTitle, $parserOptions );
1932                         $previewHTML = $parserOutput->mText;
1933                 } elseif ( $rt = Title::newFromRedirectArray( $this->textbox1 ) ) {
1934                         $previewHTML = $this->mArticle->viewRedirect( $rt, false );
1935                 } else {
1936                         $toparse = $this->textbox1;
1937
1938                         # If we're adding a comment, we need to show the
1939                         # summary as the headline
1940                         if ( $this->section == "new" && $this->summary != "" ) {
1941                                 $toparse="== {$this->summary} ==\n\n" . $toparse;
1942                         }
1943
1944                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData;
1945
1946                         // Parse mediawiki messages with correct target language
1947                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1948                                 list( /* $unused */, $lang ) = $wgMessageCache->figureMessage( $this->mTitle->getText() );
1949                                 $obj = wfGetLangObj( $lang );
1950                                 $parserOptions->setTargetLanguage( $obj );
1951                         }
1952
1953
1954                         $parserOptions->setTidy( true );
1955                         $parserOptions->enableLimitReport();
1956                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ),
1957                                         $this->mTitle, $parserOptions );
1958
1959                         $previewHTML = $parserOutput->getText();
1960                         $this->mParserOutput = $parserOutput;
1961                         $wgOut->addParserOutputNoText( $parserOutput );
1962
1963                         if ( count( $parserOutput->getWarnings() ) ) {
1964                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
1965                         }
1966                 }
1967
1968                 if( $this->isConflict ) {
1969                         $conflict = '<h2 id="mw-previewconflict">' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1970                 } else {
1971                         $conflict = '<hr />';
1972                 }
1973
1974                 $previewhead = "<div class='previewnote'>\n" .
1975                         '<h2 id="mw-previewheader">' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>" .
1976                         $wgOut->parse( $note ) . $conflict . "</div>\n";
1977
1978                 wfProfileOut( __METHOD__ );
1979                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
1980         }
1981
1982         function getTemplates() {
1983                 if ( $this->preview || $this->section != '' ) {
1984                         $templates = array();
1985                         if ( !isset( $this->mParserOutput ) ) return $templates;
1986                         foreach( $this->mParserOutput->getTemplates() as $ns => $template) {
1987                                 foreach( array_keys( $template ) as $dbk ) {
1988                                         $templates[] = Title::makeTitle($ns, $dbk);
1989                                 }
1990                         }
1991                         return $templates;
1992                 } else {
1993                         return $this->mArticle->getUsedTemplates();
1994                 }
1995         }
1996
1997         /**
1998          * Call the stock "user is blocked" page
1999          */
2000         function blockedPage() {
2001                 global $wgOut;
2002                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
2003
2004                 # If the user made changes, preserve them when showing the markup
2005                 # (This happens when a user is blocked during edit, for instance)
2006                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
2007                 if ( $first ) {
2008                         $source = $this->mTitle->exists() ? $this->getContent() : false;
2009                 } else {
2010                         $source = $this->textbox1;
2011                 }
2012
2013                 # Spit out the source or the user's modified version
2014                 if ( $source !== false ) {
2015                         $wgOut->addHTML( '<hr />' );
2016                         $wgOut->addWikiMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() );
2017                         $this->showTextbox1( array( 'readonly' ), $source );
2018                 }
2019         }
2020
2021         /**
2022          * Produce the stock "please login to edit pages" page
2023          */
2024         function userNotLoggedInPage() {
2025                 global $wgUser, $wgOut, $wgTitle;
2026                 $skin = $wgUser->getSkin();
2027
2028                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
2029                 $loginLink = $skin->link(
2030                         $loginTitle,
2031                         wfMsgHtml( 'loginreqlink' ),
2032                         array(),
2033                         array( 'returnto' => $wgTitle->getPrefixedText() ),
2034                         array( 'known', 'noclasses' )
2035                 );
2036
2037                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
2038                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2039                 $wgOut->setArticleRelated( false );
2040
2041                 $wgOut->addHTML( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
2042                 $wgOut->returnToMain( false, $wgTitle );
2043         }
2044
2045         /**
2046          * Creates a basic error page which informs the user that
2047          * they have attempted to edit a nonexistent section.
2048          */
2049         function noSuchSectionPage() {
2050                 global $wgOut, $wgTitle;
2051
2052                 $wgOut->setPageTitle( wfMsg( 'nosuchsectiontitle' ) );
2053                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2054                 $wgOut->setArticleRelated( false );
2055
2056                 $wgOut->addWikiMsg( 'nosuchsectiontext', $this->section );
2057                 $wgOut->returnToMain( false, $wgTitle );
2058         }
2059
2060         /**
2061          * Produce the stock "your edit contains spam" page
2062          *
2063          * @param $match Text which triggered one or more filters
2064          */
2065         function spamPage( $match = false ) {
2066                 global $wgOut, $wgTitle;
2067
2068                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
2069                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2070                 $wgOut->setArticleRelated( false );
2071
2072                 $wgOut->addHTML( '<div id="spamprotected">' );
2073                 $wgOut->addWikiMsg( 'spamprotectiontext' );
2074                 if ( $match )
2075                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
2076                 $wgOut->addHTML( '</div>' );
2077
2078                 $wgOut->returnToMain( false, $wgTitle );
2079         }
2080
2081         /**
2082          * @private
2083          * @todo document
2084          */
2085         function mergeChangesInto( &$editText ){
2086                 wfProfileIn( __METHOD__ );
2087
2088                 $db = wfGetDB( DB_MASTER );
2089
2090                 // This is the revision the editor started from
2091                 $baseRevision = $this->getBaseRevision();
2092                 if ( is_null( $baseRevision ) ) {
2093                         wfProfileOut( __METHOD__ );
2094                         return false;
2095                 }
2096                 $baseText = $baseRevision->getText();
2097
2098                 // The current state, we want to merge updates into it
2099                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2100                 if ( is_null( $currentRevision ) ) {
2101                         wfProfileOut( __METHOD__ );
2102                         return false;
2103                 }
2104                 $currentText = $currentRevision->getText();
2105
2106                 $result = '';
2107                 if ( wfMerge( $baseText, $editText, $currentText, $result ) ) {
2108                         $editText = $result;
2109                         wfProfileOut( __METHOD__ );
2110                         return true;
2111                 } else {
2112                         wfProfileOut( __METHOD__ );
2113                         return false;
2114                 }
2115         }
2116
2117         /**
2118          * Check if the browser is on a blacklist of user-agents known to
2119          * mangle UTF-8 data on form submission. Returns true if Unicode
2120          * should make it through, false if it's known to be a problem.
2121          * @return bool
2122          * @private
2123          */
2124         function checkUnicodeCompliantBrowser() {
2125                 global $wgBrowserBlackList;
2126                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
2127                         // No User-Agent header sent? Trust it by default...
2128                         return true;
2129                 }
2130                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
2131                 foreach ( $wgBrowserBlackList as $browser ) {
2132                         if ( preg_match($browser, $currentbrowser) ) {
2133                                 return false;
2134                         }
2135                 }
2136                 return true;
2137         }
2138
2139         /**
2140          * @deprecated use $wgParser->stripSectionName()
2141          */
2142         function pseudoParseSectionAnchor( $text ) {
2143                 global $wgParser;
2144                 return $wgParser->stripSectionName( $text );
2145         }
2146
2147         /**
2148          * Format an anchor fragment as it would appear for a given section name
2149          * @param string $text
2150          * @return string
2151          * @private
2152          */
2153         function sectionAnchor( $text ) {
2154                 global $wgParser;
2155                 return $wgParser->guessSectionNameFromWikiText( $text );
2156         }
2157
2158         /**
2159          * Shows a bulletin board style toolbar for common editing functions.
2160          * It can be disabled in the user preferences.
2161          * The necessary JavaScript code can be found in skins/common/edit.js.
2162          *
2163          * @return string
2164          */
2165         static function getEditToolbar() {
2166                 global $wgStylePath, $wgContLang, $wgLang;
2167
2168                 /**
2169
2170                  * toolarray an array of arrays which each include the filename of
2171                  * the button image (without path), the opening tag, the closing tag,
2172                  * and optionally a sample text that is inserted between the two when no
2173                  * selection is highlighted.
2174                  * The tip text is shown when the user moves the mouse over the button.
2175                  *
2176                  * Already here are accesskeys (key), which are not used yet until someone
2177                  * can figure out a way to make them work in IE. However, we should make
2178                  * sure these keys are not defined on the edit page.
2179                  */
2180                 $toolarray = array(
2181                         array(
2182                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
2183                                 'id'     => 'mw-editbutton-bold',
2184                                 'open'   => '\'\'\'',
2185                                 'close'  => '\'\'\'',
2186                                 'sample' => wfMsg( 'bold_sample' ),
2187                                 'tip'    => wfMsg( 'bold_tip' ),
2188                                 'key'    => 'B'
2189                         ),
2190                         array(
2191                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
2192                                 'id'     => 'mw-editbutton-italic',
2193                                 'open'   => '\'\'',
2194                                 'close'  => '\'\'',
2195                                 'sample' => wfMsg( 'italic_sample' ),
2196                                 'tip'    => wfMsg( 'italic_tip' ),
2197                                 'key'    => 'I'
2198                         ),
2199                         array(
2200                                 'image'  => $wgLang->getImageFile( 'button-link' ),
2201                                 'id'     => 'mw-editbutton-link',
2202                                 'open'   => '[[',
2203                                 'close'  => ']]',
2204                                 'sample' => wfMsg( 'link_sample' ),
2205                                 'tip'    => wfMsg( 'link_tip' ),
2206                                 'key'    => 'L'
2207                         ),
2208                         array(
2209                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
2210                                 'id'     => 'mw-editbutton-extlink',
2211                                 'open'   => '[',
2212                                 'close'  => ']',
2213                                 'sample' => wfMsg( 'extlink_sample' ),
2214                                 'tip'    => wfMsg( 'extlink_tip' ),
2215                                 'key'    => 'X'
2216                         ),
2217                         array(
2218                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
2219                                 'id'     => 'mw-editbutton-headline',
2220                                 'open'   => "\n== ",
2221                                 'close'  => " ==\n",
2222                                 'sample' => wfMsg( 'headline_sample' ),
2223                                 'tip'    => wfMsg( 'headline_tip' ),
2224                                 'key'    => 'H'
2225                         ),
2226                         array(
2227                                 'image'  => $wgLang->getImageFile( 'button-image' ),
2228                                 'id'     => 'mw-editbutton-image',
2229                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
2230                                 'close'  => ']]',
2231                                 'sample' => wfMsg( 'image_sample' ),
2232                                 'tip'    => wfMsg( 'image_tip' ),
2233                                 'key'    => 'D'
2234                         ),
2235                         array(
2236                                 'image'  => $wgLang->getImageFile( 'button-media' ),
2237                                 'id'     => 'mw-editbutton-media',
2238                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
2239                                 'close'  => ']]',
2240                                 'sample' => wfMsg( 'media_sample' ),
2241                                 'tip'    => wfMsg( 'media_tip' ),
2242                                 'key'    => 'M'
2243                         ),
2244                         array(
2245                                 'image'  => $wgLang->getImageFile( 'button-math' ),
2246                                 'id'     => 'mw-editbutton-math',
2247                                 'open'   => "<math>",
2248                                 'close'  => "</math>",
2249                                 'sample' => wfMsg( 'math_sample' ),
2250                                 'tip'    => wfMsg( 'math_tip' ),
2251                                 'key'    => 'C'
2252                         ),
2253                         array(
2254                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
2255                                 'id'     => 'mw-editbutton-nowiki',
2256                                 'open'   => "<nowiki>",
2257                                 'close'  => "</nowiki>",
2258                                 'sample' => wfMsg( 'nowiki_sample' ),
2259                                 'tip'    => wfMsg( 'nowiki_tip' ),
2260                                 'key'    => 'N'
2261                         ),
2262                         array(
2263                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
2264                                 'id'     => 'mw-editbutton-signature',
2265                                 'open'   => '--~~~~',
2266                                 'close'  => '',
2267                                 'sample' => '',
2268                                 'tip'    => wfMsg( 'sig_tip' ),
2269                                 'key'    => 'Y'
2270                         ),
2271                         array(
2272                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
2273                                 'id'     => 'mw-editbutton-hr',
2274                                 'open'   => "\n----\n",
2275                                 'close'  => '',
2276                                 'sample' => '',
2277                                 'tip'    => wfMsg( 'hr_tip' ),
2278                                 'key'    => 'R'
2279                         )
2280                 );
2281                 $toolbar = "<div id='toolbar'>\n";
2282
2283                 $script = '';
2284                 foreach ( $toolarray as $tool ) {
2285                         $params = array(
2286                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
2287                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
2288                                 // Older browsers show a "speedtip" type message only for ALT.
2289                                 // Ideally these should be different, realistically they
2290                                 // probably don't need to be.
2291                                 $tip = $tool['tip'],
2292                                 $open = $tool['open'],
2293                                 $close = $tool['close'],
2294                                 $sample = $tool['sample'],
2295                                 $cssId = $tool['id'],
2296                         );
2297
2298                         $paramList = implode( ',',
2299                                 array_map( array( 'Xml', 'encodeJsVar' ), $params ) );
2300                         $script .= "addButton($paramList);\n";
2301                 }
2302                 $toolbar .= Html::inlineScript( "\n$script\n" );
2303
2304                 $toolbar .= "\n</div>";
2305
2306                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
2307
2308                 return $toolbar;
2309         }
2310
2311         /**
2312          * Returns an array of html code of the following checkboxes:
2313          * minor and watch
2314          *
2315          * @param $tabindex Current tabindex
2316          * @param $skin Skin object
2317          * @param $checked Array of checkbox => bool, where bool indicates the checked
2318          *                 status of the checkbox
2319          *
2320          * @return array
2321          */
2322         public function getCheckboxes( &$tabindex, $skin, $checked ) {
2323                 global $wgUser;
2324
2325                 $checkboxes = array();
2326
2327                 $checkboxes['minor'] = '';
2328                 $minorLabel = wfMsgExt( 'minoredit', array( 'parseinline' ) );
2329                 if ( $wgUser->isAllowed( 'minoredit' ) ) {
2330                         $attribs = array(
2331                                 'tabindex'  => ++$tabindex,
2332                                 'accesskey' => wfMsg( 'accesskey-minoredit' ),
2333                                 'id'        => 'wpMinoredit',
2334                         );
2335                         $checkboxes['minor'] =
2336                                 Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
2337                                 "&nbsp;<label for='wpMinoredit'" . $skin->tooltip( 'minoredit', 'withaccess' ) . ">{$minorLabel}</label>";
2338                 }
2339
2340                 $watchLabel = wfMsgExt( 'watchthis', array( 'parseinline' ) );
2341                 $checkboxes['watch'] = '';
2342                 if ( $wgUser->isLoggedIn() ) {
2343                         $attribs = array(
2344                                 'tabindex'  => ++$tabindex,
2345                                 'accesskey' => wfMsg( 'accesskey-watch' ),
2346                                 'id'        => 'wpWatchthis',
2347                         );
2348                         $checkboxes['watch'] =
2349                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
2350                                 "&nbsp;<label for='wpWatchthis'" . $skin->tooltip( 'watch', 'withaccess' ) . ">{$watchLabel}</label>";
2351                 }
2352                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
2353                 return $checkboxes;
2354         }
2355
2356         /**
2357          * Returns an array of html code of the following buttons:
2358          * save, diff, preview and live
2359          *
2360          * @param $tabindex Current tabindex
2361          *
2362          * @return array
2363          */
2364         public function getEditButtons(&$tabindex) {
2365                 $buttons = array();
2366
2367                 $temp = array(
2368                         'id'        => 'wpSave',
2369                         'name'      => 'wpSave',
2370                         'type'      => 'submit',
2371                         'tabindex'  => ++$tabindex,
2372                         'value'     => wfMsg( 'savearticle' ),
2373                         'accesskey' => wfMsg( 'accesskey-save' ),
2374                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
2375                 );
2376                 $buttons['save'] = Xml::element('input', $temp, '');
2377
2378                 ++$tabindex; // use the same for preview and live preview
2379                 $temp = array(
2380                         'id'        => 'wpPreview',
2381                         'name'      => 'wpPreview',
2382                         'type'      => 'submit',
2383                         'tabindex'  => $tabindex,
2384                         'value'     => wfMsg( 'showpreview' ),
2385                         'accesskey' => wfMsg( 'accesskey-preview' ),
2386                         'title'     => wfMsg( 'tooltip-preview' ) . ' [' . wfMsg( 'accesskey-preview' ) . ']',
2387                 );
2388                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
2389                 $buttons['live'] = '';
2390
2391                 $temp = array(
2392                         'id'        => 'wpDiff',
2393                         'name'      => 'wpDiff',
2394                         'type'      => 'submit',
2395                         'tabindex'  => ++$tabindex,
2396                         'value'     => wfMsg( 'showdiff' ),
2397                         'accesskey' => wfMsg( 'accesskey-diff' ),
2398                         'title'     => wfMsg( 'tooltip-diff' ) . ' [' . wfMsg( 'accesskey-diff' ) . ']',
2399                 );
2400                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
2401
2402                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
2403                 return $buttons;
2404         }
2405
2406         /**
2407          * Output preview text only. This can be sucked into the edit page
2408          * via JavaScript, and saves the server time rendering the skin as
2409          * well as theoretically being more robust on the client (doesn't
2410          * disturb the edit box's undo history, won't eat your text on
2411          * failure, etc).
2412          *
2413          * @todo This doesn't include category or interlanguage links.
2414          *       Would need to enhance it a bit, <s>maybe wrap them in XML
2415          *       or something...</s> that might also require more skin
2416          *       initialization, so check whether that's a problem.
2417          */
2418         function livePreview() {
2419                 global $wgOut;
2420                 $wgOut->disable();
2421                 header( 'Content-type: text/xml; charset=utf-8' );
2422                 header( 'Cache-control: no-cache' );
2423
2424                 $previewText = $this->getPreviewText();
2425                 #$categories = $skin->getCategoryLinks();
2426
2427                 $s =
2428                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
2429                 Xml::tags( 'livepreview', null,
2430                         Xml::element( 'preview', null, $previewText )
2431                         #.      Xml::element( 'category', null, $categories )
2432                 );
2433                 echo $s;
2434         }
2435
2436
2437         public function getCancelLink() {
2438                 global $wgUser, $wgTitle;
2439                 $cancelParams = array();
2440                 if ( !$this->isConflict && isset( $this->mArticle ) &&
2441                         isset( $this->mArticle->mRevision ) &&
2442                         !$this->mArticle->mRevision->isCurrent() )
2443                                 $cancelParams['oldid'] = $this->mArticle->mRevision->getId();
2444                 return $wgUser->getSkin()->link(
2445                         $wgTitle,
2446                         wfMsgExt( 'cancel', array( 'parseinline' ) ),
2447                         array( 'id' => 'mw-editform-cancel' ),
2448                         $cancelParams,
2449                         array( 'known', 'noclasses' )
2450                 );
2451         }
2452
2453         /**
2454          * Get a diff between the current contents of the edit box and the
2455          * version of the page we're editing from.
2456          *
2457          * If this is a section edit, we'll replace the section as for final
2458          * save and then make a comparison.
2459          */
2460         function showDiff() {
2461                 $oldtext = $this->mArticle->fetchContent();
2462                 $newtext = $this->mArticle->replaceSection(
2463                         $this->section, $this->textbox1, $this->summary, $this->edittime );
2464                 $newtext = $this->mArticle->preSaveTransform( $newtext );
2465                 $oldtitle = wfMsgExt( 'currentrev', array( 'parseinline' ) );
2466                 $newtitle = wfMsgExt( 'yourtext', array( 'parseinline' ) );
2467                 if ( $oldtext !== false  || $newtext != '' ) {
2468                         $de = new DifferenceEngine( $this->mTitle );
2469                         $de->setText( $oldtext, $newtext );
2470                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2471                         $de->showDiffStyle();
2472                 } else {
2473                         $difftext = '';
2474                 }
2475
2476                 global $wgOut;
2477                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2478         }
2479
2480         /**
2481          * Filter an input field through a Unicode de-armoring process if it
2482          * came from an old browser with known broken Unicode editing issues.
2483          *
2484          * @param WebRequest $request
2485          * @param string $field
2486          * @return string
2487          * @private
2488          */
2489         function safeUnicodeInput( $request, $field ) {
2490                 $text = rtrim( $request->getText( $field ) );
2491                 return $request->getBool( 'safemode' )
2492                         ? $this->unmakesafe( $text )
2493                         : $text;
2494         }
2495
2496         function safeUnicodeText( $request, $text ) {
2497                 $text = rtrim( $text );
2498                 return $request->getBool( 'safemode' )
2499                         ? $this->unmakesafe( $text )
2500                         : $text;
2501         }
2502
2503         /**
2504          * Filter an output field through a Unicode armoring process if it is
2505          * going to an old browser with known broken Unicode editing issues.
2506          *
2507          * @param string $text
2508          * @return string
2509          * @private
2510          */
2511         function safeUnicodeOutput( $text ) {
2512                 global $wgContLang;
2513                 $codedText = $wgContLang->recodeForEdit( $text );
2514                 return $this->checkUnicodeCompliantBrowser()
2515                         ? $codedText
2516                         : $this->makesafe( $codedText );
2517         }
2518
2519         /**
2520          * A number of web browsers are known to corrupt non-ASCII characters
2521          * in a UTF-8 text editing environment. To protect against this,
2522          * detected browsers will be served an armored version of the text,
2523          * with non-ASCII chars converted to numeric HTML character references.
2524          *
2525          * Preexisting such character references will have a 0 added to them
2526          * to ensure that round-trips do not alter the original data.
2527          *
2528          * @param string $invalue
2529          * @return string
2530          * @private
2531          */
2532         function makesafe( $invalue ) {
2533                 // Armor existing references for reversability.
2534                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
2535
2536                 $bytesleft = 0;
2537                 $result = "";
2538                 $working = 0;
2539                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2540                         $bytevalue = ord( $invalue{$i} );
2541                         if ( $bytevalue <= 0x7F ) { //0xxx xxxx
2542                                 $result .= chr( $bytevalue );
2543                                 $bytesleft = 0;
2544                         } elseif ( $bytevalue <= 0xBF ) { //10xx xxxx
2545                                 $working = $working << 6;
2546                                 $working += ($bytevalue & 0x3F);
2547                                 $bytesleft--;
2548                                 if ( $bytesleft <= 0 ) {
2549                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
2550                                 }
2551                         } elseif ( $bytevalue <= 0xDF ) { //110x xxxx
2552                                 $working = $bytevalue & 0x1F;
2553                                 $bytesleft = 1;
2554                         } elseif ( $bytevalue <= 0xEF ) { //1110 xxxx
2555                                 $working = $bytevalue & 0x0F;
2556                                 $bytesleft = 2;
2557                         } else { //1111 0xxx
2558                                 $working = $bytevalue & 0x07;
2559                                 $bytesleft = 3;
2560                         }
2561                 }
2562                 return $result;
2563         }
2564
2565         /**
2566          * Reverse the previously applied transliteration of non-ASCII characters
2567          * back to UTF-8. Used to protect data from corruption by broken web browsers
2568          * as listed in $wgBrowserBlackList.
2569          *
2570          * @param string $invalue
2571          * @return string
2572          * @private
2573          */
2574         function unmakesafe( $invalue ) {
2575                 $result = "";
2576                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2577                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
2578                                 $i += 3;
2579                                 $hexstring = "";
2580                                 do {
2581                                         $hexstring .= $invalue{$i};
2582                                         $i++;
2583                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
2584
2585                                 // Do some sanity checks. These aren't needed for reversability,
2586                                 // but should help keep the breakage down if the editor
2587                                 // breaks one of the entities whilst editing.
2588                                 if ( (substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6) ) {
2589                                         $codepoint = hexdec($hexstring);
2590                                         $result .= codepointToUtf8( $codepoint );
2591                                 } else {
2592                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
2593                                 }
2594                         } else {
2595                                 $result .= substr( $invalue, $i, 1 );
2596                         }
2597                 }
2598                 // reverse the transform that we made for reversability reasons.
2599                 return strtr( $result, array( "&#x0" => "&#x" ) );
2600         }
2601
2602         function noCreatePermission() {
2603                 global $wgOut;
2604                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
2605                 $wgOut->addWikiMsg( 'nocreatetext' );
2606         }
2607
2608         /**
2609          * Attempt submission
2610          * @return bool false if output is done, true if the rest of the form should be displayed
2611          */
2612         function attemptSave() {
2613                 global $wgUser, $wgOut, $wgTitle;
2614
2615                 $resultDetails = false;
2616                 # Allow bots to exempt some edits from bot flagging
2617                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
2618                 $value = $this->internalAttemptSave( $resultDetails, $bot );
2619
2620                 if ( $value == self::AS_SUCCESS_UPDATE || $value == self::AS_SUCCESS_NEW_ARTICLE ) {
2621                         $this->didSave = true;
2622                 }
2623
2624                 switch ( $value ) {
2625                         case self::AS_HOOK_ERROR_EXPECTED:
2626                         case self::AS_CONTENT_TOO_BIG:
2627                         case self::AS_ARTICLE_WAS_DELETED:
2628                         case self::AS_CONFLICT_DETECTED:
2629                         case self::AS_SUMMARY_NEEDED:
2630                         case self::AS_TEXTBOX_EMPTY:
2631                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
2632                         case self::AS_END:
2633                                 return true;
2634
2635                         case self::AS_HOOK_ERROR:
2636                         case self::AS_FILTERING:
2637                         case self::AS_SUCCESS_NEW_ARTICLE:
2638                         case self::AS_SUCCESS_UPDATE:
2639                                 return false;
2640
2641                         case self::AS_SPAM_ERROR:
2642                                 $this->spamPage( $resultDetails['spam'] );
2643                                 return false;
2644
2645                         case self::AS_BLOCKED_PAGE_FOR_USER:
2646                                 $this->blockedPage();
2647                                 return false;
2648
2649                         case self::AS_IMAGE_REDIRECT_ANON:
2650                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
2651                                 return false;
2652
2653                         case self::AS_READ_ONLY_PAGE_ANON:
2654                                 $this->userNotLoggedInPage();
2655                                 return false;
2656
2657                         case self::AS_READ_ONLY_PAGE_LOGGED:
2658                         case self::AS_READ_ONLY_PAGE:
2659                                 $wgOut->readOnlyPage();
2660                                 return false;
2661
2662                         case self::AS_RATE_LIMITED:
2663                                 $wgOut->rateLimited();
2664                                 return false;
2665
2666                         case self::AS_NO_CREATE_PERMISSION:
2667                                 $this->noCreatePermission();
2668                                 return;
2669
2670                         case self::AS_BLANK_ARTICLE:
2671                                 $wgOut->redirect( $wgTitle->getFullURL() );
2672                                 return false;
2673
2674                         case self::AS_IMAGE_REDIRECT_LOGGED:
2675                                 $wgOut->permissionRequired( 'upload' );
2676                                 return false;
2677                 }
2678         }
2679
2680         function getBaseRevision() {
2681                 if ( $this->mBaseRevision == false ) {
2682                         $db = wfGetDB( DB_MASTER );
2683                         $baseRevision = Revision::loadFromTimestamp(
2684                                 $db, $this->mTitle, $this->edittime );
2685                         return $this->mBaseRevision = $baseRevision;
2686                 } else {
2687                         return $this->mBaseRevision;
2688                 }
2689         }
2690 }