includes/EditPage.php

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