includes/EditPage.php

   1 <?php
   2 /**
   3  * Contains the EditPage class
   4  * @file
   5  */
   6
   7 /**
   8  * The edit page/HTML interface (split from Article)
   9  * The actual database and text munging is still in Article,
  10  * but it should get easier to call those from alternate
  11  * interfaces.
  12  *
  13  * EditPage cares about two distinct titles:
  14  * $wgTitle is the page that forms submit to, links point to,
  15  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  16  * page in the database that is actually being edited. These are
  17  * usually the same, but they are now allowed to be different.
  18  */
  19 class EditPage {
  20         const AS_SUCCESS_UPDATE            = 200;
  21         const AS_SUCCESS_NEW_ARTICLE       = 201;
  22         const AS_HOOK_ERROR                = 210;
  23         const AS_FILTERING                 = 211;
  24         const AS_HOOK_ERROR_EXPECTED       = 212;
  25         const AS_BLOCKED_PAGE_FOR_USER     = 215;
  26         const AS_CONTENT_TOO_BIG           = 216;
  27         const AS_USER_CANNOT_EDIT          = 217;
  28         const AS_READ_ONLY_PAGE_ANON       = 218;
  29         const AS_READ_ONLY_PAGE_LOGGED     = 219;
  30         const AS_READ_ONLY_PAGE            = 220;
  31         const AS_RATE_LIMITED              = 221;
  32         const AS_ARTICLE_WAS_DELETED       = 222;
  33         const AS_NO_CREATE_PERMISSION      = 223;
  34         const AS_BLANK_ARTICLE             = 224;
  35         const AS_CONFLICT_DETECTED         = 225;
  36         const AS_SUMMARY_NEEDED            = 226;
  37         const AS_TEXTBOX_EMPTY             = 228;
  38         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
  39         const AS_OK                        = 230;
  40         const AS_END                       = 231;
  41         const AS_SPAM_ERROR                = 232;
  42         const AS_IMAGE_REDIRECT_ANON       = 233;
  43         const AS_IMAGE_REDIRECT_LOGGED     = 234;
  44
  45         var $mArticle;
  46         var $mTitle;
  47         var $action;
  48         var $isConflict = false;
  49         var $isCssJsSubpage = false;
  50         var $isCssSubpage = false;
  51         var $isJsSubpage = false;
  52         var $deletedSinceEdit = false;
  53         var $formtype;
  54         var $firsttime;
  55         var $lastDelete;
  56         var $mTokenOk = false;
  57         var $mTokenOkExceptSuffix = false;
  58         var $mTriedSave = false;
  59         var $tooBig = false;
  60         var $kblength = false;
  61         var $missingComment = false;
  62         var $missingSummary = false;
  63         var $allowBlankSummary = false;
  64         var $autoSumm = '';
  65         var $hookError = '';
  66         #var $mPreviewTemplates;
  67         var $mParserOutput;
  68         var $mBaseRevision = false;
  69         var $mShowSummaryField = true;
  70
  71         # Form values
  72         var $save = false, $preview = false, $diff = false;
  73         var $minoredit = false, $watchthis = false, $recreate = false;
  74         var $textbox1 = '', $textbox2 = '', $summary = '', $nosummary = false;
  75         var $edittime = '', $section = '', $starttime = '';
  76         var $oldid = 0, $editintro = '', $scrolltop = null, $bot = true;
  77
  78         # Placeholders for text injection by hooks (must be HTML)
  79         # extensions should take care to _append_ to the present value
  80         public $editFormPageTop; // Before even the preview
  81         public $editFormTextTop;
  82         public $editFormTextBeforeContent;
  83         public $editFormTextAfterWarn;
  84         public $editFormTextAfterTools;
  85         public $editFormTextBottom;
  86         public $editFormTextAfterContent;
  87         public $previewTextAfterContent;
  88
  89         /* $didSave should be set to true whenever an article was succesfully altered. */
  90         public $didSave = false;
  91         public $undidRev = 0;
  92
  93         public $suppressIntro = false;
  94
  95         /**
  96          * @todo document
  97          * @param $article
  98          */
  99         function __construct( $article ) {
 100                 $this->mArticle =& $article;
 101                 $this->mTitle = $article->getTitle();
 102                 $this->action = 'submit';
 103
 104                 # Placeholders for text injection by hooks (empty per default)
 105                 $this->editFormPageTop =
 106                 $this->editFormTextTop =
 107                 $this->editFormTextBeforeContent =
 108                 $this->editFormTextAfterWarn =
 109                 $this->editFormTextAfterTools =
 110                 $this->editFormTextBottom =
 111                 $this->editFormTextAfterContent =
 112                 $this->previewTextAfterContent =
 113                 $this->mPreloadText = "";
 114         }
 115
 116         function getArticle() {
 117                 return $this->mArticle;
 118         }
 119
 120
 121         /**
 122          * Fetch initial editing page content.
 123          * @returns mixed string on success, $def_text for invalid sections
 124          * @private
 125          */
 126         function getContent( $def_text = '' ) {
 127                 global $wgOut, $wgRequest, $wgParser, $wgContLang, $wgMessageCache;
 128
 129                 wfProfileIn( __METHOD__ );
 130                 # Get variables from query string :P
 131                 $section = $wgRequest->getVal( 'section' );
 132
 133                 $preload = $wgRequest->getVal( 'preload',
 134                         // Custom preload text for new sections
 135                         $section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 136                 $undoafter = $wgRequest->getVal( 'undoafter' );
 137                 $undo = $wgRequest->getVal( 'undo' );
 138
 139                 // For message page not locally set, use the i18n message.
 140                 // For other non-existent articles, use preload text if any.
 141                 if ( !$this->mTitle->exists() ) {
 142                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 143                                 # If this is a system message, get the default text.
 144                                 list( $message, $lang ) = $wgMessageCache->figureMessage( $wgContLang->lcfirst( $this->mTitle->getText() ) );
 145                                 $text = wfMsgGetKey( $message, false, $lang, false );
 146                                 if( wfEmptyMsg( $message, $text ) )
 147                                         $text = $this->getPreloadedText( $preload );
 148                         } else {
 149                                 # If requested, preload some text.
 150                                 $text = $this->getPreloadedText( $preload );
 151                         }
 152                 // For existing pages, get text based on "undo" or section parameters.
 153                 } else {
 154                         $text = $this->mArticle->getContent();
 155                         if ( $undo > 0 && $undoafter > 0 && $undo < $undoafter ) {
 156                                 # If they got undoafter and undo round the wrong way, switch them
 157                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 158                         }
 159                         if ( $undo > 0 && $undo > $undoafter ) {
 160                                 # Undoing a specific edit overrides section editing; section-editing
 161                                 # doesn't work with undoing.
 162                                 if ( $undoafter ) {
 163                                         $undorev = Revision::newFromId( $undo );
 164                                         $oldrev = Revision::newFromId( $undoafter );
 165                                 } else {
 166                                         $undorev = Revision::newFromId( $undo );
 167                                         $oldrev = $undorev ? $undorev->getPrevious() : null;
 168                                 }
 169
 170                                 # Sanity check, make sure it's the right page,
 171                                 # the revisions exist and they were not deleted.
 172                                 # Otherwise, $text will be left as-is.
 173                                 if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 174                                         $undorev->getPage() == $oldrev->getPage() &&
 175                                         $undorev->getPage() == $this->mArticle->getID() &&
 176                                         !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 177                                         !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 178
 179                                         $undotext = $this->mArticle->getUndoText( $undorev, $oldrev );
 180                                         if ( $undotext === false ) {
 181                                                 # Warn the user that something went wrong
 182                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-failure">' . wfMsgNoTrans( 'undo-failure' ) . '</div>' );
 183                                         } else {
 184                                                 $text = $undotext;
 185                                                 # Inform the user of our success and set an automatic edit summary
 186                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="mw-undo-success">' . wfMsgNoTrans( 'undo-success' ) . '</div>' );
 187                                                 $firstrev = $oldrev->getNext();
 188                                                 # If we just undid one rev, use an autosummary
 189                                                 if ( $firstrev->mId == $undo ) {
 190                                                         $this->summary = wfMsgForContent( 'undo-summary', $undo, $undorev->getUserText() );
 191                                                         $this->undidRev = $undo;
 192                                                 }
 193                                                 $this->formtype = 'diff';
 194                                         }
 195                                 } else {
 196                                         // Failed basic sanity checks.
 197                                         // Older revisions may have been removed since the link
 198                                         // was created, or we may simply have got bogus input.
 199                                         $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-norev">' . wfMsgNoTrans( 'undo-norev' ) . '</div>' );
 200                                 }
 201                         } else if ( $section != '' ) {
 202                                 if ( $section == 'new' ) {
 203                                         $text = $this->getPreloadedText( $preload );
 204                                 } else {
 205                                         // Get section edit text (returns $def_text for invalid sections)
 206                                         $text = $wgParser->getSection( $text, $section, $def_text );
 207                                 }
 208                         }
 209                 }
 210
 211                 wfProfileOut( __METHOD__ );
 212                 return $text;
 213         }
 214
 215         /** Use this method before edit() to preload some text into the edit box */
 216         public function setPreloadedText( $text ) {
 217                 $this->mPreloadText = $text;
 218         }
 219
 220         /**
 221          * Get the contents to be preloaded into the box, either set by
 222          * an earlier setPreloadText() or by loading the given page.
 223          *
 224          * @param $preload String: representing the title to preload from.
 225          * @return String
 226          */
 227         protected function getPreloadedText( $preload ) {
 228                 global $wgUser, $wgParser;
 229                 if ( !empty( $this->mPreloadText ) ) {
 230                         return $this->mPreloadText;
 231                 } elseif ( $preload !== '' ) {
 232                         $title = Title::newFromText( $preload );
 233                         # Check for existence to avoid getting MediaWiki:Noarticletext
 234                         if ( isset( $title ) && $title->exists() && $title->userCanRead() ) {
 235                                 $article = new Article( $title );
 236
 237                                 if ( $article->isRedirect() ) {
 238                                         $title = Title::newFromRedirectRecurse( $article->getContent() );
 239                                         # Redirects to missing titles are displayed, to hidden pages are followed
 240                                         # Copying observed behaviour from ?action=view
 241                                         if ( $title->exists() ) {
 242                                                 if ($title->userCanRead() ) {
 243                                                         $article = new Article( $title );
 244                                                 } else {
 245                                                         return "";
 246                                                 }
 247                                         }
 248                                 }
 249                                 $parserOptions = ParserOptions::newFromUser( $wgUser );
 250                                 return $wgParser->getPreloadText( $article->getContent(), $title, $parserOptions );
 251                         }
 252                 }
 253                 return '';
 254         }
 255
 256         /*
 257          * Check if a page was deleted while the user was editing it, before submit.
 258          * Note that we rely on the logging table, which hasn't been always there,
 259          * but that doesn't matter, because this only applies to brand new
 260          * deletes.
 261          */
 262         protected function wasDeletedSinceLastEdit() {
 263                 if ( $this->deletedSinceEdit )
 264                         return true;
 265                 if ( $this->mTitle->isDeletedQuick() ) {
 266                         $this->lastDelete = $this->getLastDelete();
 267                         if ( $this->lastDelete ) {
 268                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
 269                                 if ( $deleteTime > $this->starttime ) {
 270                                         $this->deletedSinceEdit = true;
 271                                 }
 272                         }
 273                 }
 274                 return $this->deletedSinceEdit;
 275         }
 276
 277         /**
 278          * Checks whether the user entered a skin name in uppercase,
 279          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 280          */
 281         protected function isWrongCaseCssJsPage() {
 282                 if( $this->mTitle->isCssJsSubpage() ) {
 283                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 284                         $skins = array_merge(
 285                                 array_keys( Skin::getSkinNames() ),
 286                                 array( 'common' )
 287                         );
 288                         return !in_array( $name, $skins )
 289                                 && in_array( strtolower( $name ), $skins );
 290                 } else {
 291                         return false;
 292                 }
 293         }
 294
 295         function submit() {
 296                 $this->edit();
 297         }
 298
 299         /**
 300          * This is the function that gets called for "action=edit". It
 301          * sets up various member variables, then passes execution to
 302          * another function, usually showEditForm()
 303          *
 304          * The edit form is self-submitting, so that when things like
 305          * preview and edit conflicts occur, we get the same form back
 306          * with the extra stuff added.  Only when the final submission
 307          * is made and all is well do we actually save and redirect to
 308          * the newly-edited page.
 309          */
 310         function edit() {
 311                 global $wgOut, $wgRequest, $wgUser;
 312                 // Allow extensions to modify/prevent this form or submission
 313                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 314                         return;
 315                 }
 316
 317                 wfProfileIn( __METHOD__ );
 318                 wfDebug( __METHOD__.": enter\n" );
 319
 320                 // This is not an article
 321                 $wgOut->setArticleFlag( false );
 322
 323                 $this->importFormData( $wgRequest );
 324                 $this->firsttime = false;
 325
 326                 if ( $this->live ) {
 327                         $this->livePreview();
 328                         wfProfileOut( __METHOD__ );
 329                         return;
 330                 }
 331
 332                 if ( wfReadOnly() && $this->save ) {
 333                         // Force preview
 334                         $this->save = false;
 335                         $this->preview = true;
 336                 }
 337
 338                 $wgOut->addModules( 'mediawiki.legacy.edit' );
 339
 340                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
 341                         $wgOut->addModules( 'mediawiki.legacy.preview' );
 342                 }
 343
 344                 $permErrors = $this->getEditPermissionErrors();
 345                 if ( $permErrors ) {
 346                         wfDebug( __METHOD__ . ": User can't edit\n" );
 347                         $content = $this->getContent( null );
 348                         $content = $content === '' ? null : $content;
 349                         $this->readOnlyPage( $content, true, $permErrors, 'edit' );
 350                         wfProfileOut( __METHOD__ );
 351                         return;
 352                 } else {
 353                         if ( $this->save ) {
 354                                 $this->formtype = 'save';
 355                         } else if ( $this->preview ) {
 356                                 $this->formtype = 'preview';
 357                         } else if ( $this->diff ) {
 358                                 $this->formtype = 'diff';
 359                         } else { # First time through
 360                                 $this->firsttime = true;
 361                                 if ( $this->previewOnOpen() ) {
 362                                         $this->formtype = 'preview';
 363                                 } else {
 364                                         $this->formtype = 'initial';
 365                                 }
 366                         }
 367                 }
 368
 369                 // If they used redlink=1 and the page exists, redirect to the main article
 370                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 371                         $wgOut->redirect( $this->mTitle->getFullURL() );
 372                 }
 373
 374                 wfProfileIn( __METHOD__."-business-end" );
 375
 376                 $this->isConflict = false;
 377                 // css / js subpages of user pages get a special treatment
 378                 $this->isCssJsSubpage      = $this->mTitle->isCssJsSubpage();
 379                 $this->isCssSubpage        = $this->mTitle->isCssSubpage();
 380                 $this->isJsSubpage         = $this->mTitle->isJsSubpage();
 381                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 382
 383                 # Show applicable editing introductions
 384                 if ( $this->formtype == 'initial' || $this->firsttime )
 385                         $this->showIntro();
 386
 387                 if ( $this->mTitle->isTalkPage() ) {
 388                         $wgOut->addWikiMsg( 'talkpagetext' );
 389                 }
 390
 391                 # Optional notices on a per-namespace and per-page basis
 392                 $editnotice_ns   = 'editnotice-'.$this->mTitle->getNamespace();
 393                 if ( !wfEmptyMsg( $editnotice_ns, wfMsgForContent( $editnotice_ns ) ) ) {
 394                         $wgOut->addWikiText( wfMsgForContent( $editnotice_ns )  );
 395                 }
 396                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
 397                         $parts = explode( '/', $this->mTitle->getDBkey() );
 398                         $editnotice_base = $editnotice_ns;
 399                         while ( count( $parts ) > 0 ) {
 400                                 $editnotice_base .= '-'.array_shift( $parts );
 401                                 if ( !wfEmptyMsg( $editnotice_base, wfMsgForContent( $editnotice_base ) ) ) {
 402                                         $wgOut->addWikiText( wfMsgForContent( $editnotice_base )  );
 403                                 }
 404                         }
 405                 }
 406
 407                 # Attempt submission here.  This will check for edit conflicts,
 408                 # and redundantly check for locked database, blocked IPs, etc.
 409                 # that edit() already checked just in case someone tries to sneak
 410                 # in the back door with a hand-edited submission URL.
 411
 412                 if ( 'save' == $this->formtype ) {
 413                         if ( !$this->attemptSave() ) {
 414                                 wfProfileOut( __METHOD__."-business-end" );
 415                                 wfProfileOut( __METHOD__ );
 416                                 return;
 417                         }
 418                 }
 419
 420                 # First time through: get contents, set time for conflict
 421                 # checking, etc.
 422                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 423                         if ( $this->initialiseForm() === false ) {
 424                                 $this->noSuchSectionPage();
 425                                 wfProfileOut( __METHOD__."-business-end" );
 426                                 wfProfileOut( __METHOD__ );
 427                                 return;
 428                         }
 429                         if ( !$this->mTitle->getArticleId() )
 430                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 431                         else
 432                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 433                 }
 434
 435                 $this->showEditForm();
 436                 wfProfileOut( __METHOD__."-business-end" );
 437                 wfProfileOut( __METHOD__ );
 438         }
 439
 440         protected function getEditPermissionErrors() {
 441                 global $wgUser;
 442                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 443                 # Can this title be created?
 444                 if ( !$this->mTitle->exists() ) {
 445                         $permErrors = array_merge( $permErrors,
 446                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 447                 }
 448                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 449                 $remove = array();
 450                 foreach( $permErrors as $error ) {
 451                         if ( ( $this->preview || $this->diff ) &&
 452                                 ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' ) )
 453                         {
 454                                 $remove[] = $error;
 455                         }
 456                 }
 457                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 458                 return $permErrors;
 459         }
 460
 461         /**
 462          * Show a read-only error
 463          * Parameters are the same as OutputPage:readOnlyPage()
 464          * Redirect to the article page if redlink=1
 465          */
 466         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 467                 global $wgRequest, $wgOut;
 468                 if ( $wgRequest->getBool( 'redlink' ) ) {
 469                         // The edit page was reached via a red link.
 470                         // Redirect to the article page and let them click the edit tab if
 471                         // they really want a permission error.
 472                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 473                 } else {
 474                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 475                 }
 476         }
 477
 478         /**
 479          * Should we show a preview when the edit form is first shown?
 480          *
 481          * @return bool
 482          */
 483         protected function previewOnOpen() {
 484                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 485                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 486                         // Explicit override from request
 487                         return true;
 488                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 489                         // Explicit override from request
 490                         return false;
 491                 } elseif ( $this->section == 'new' ) {
 492                         // Nothing *to* preview for new sections
 493                         return false;
 494                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 495                         // Standard preference behaviour
 496                         return true;
 497                 } elseif ( !$this->mTitle->exists() &&
 498                   isset($wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]) &&
 499                   $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 500                 {
 501                         // Categories are special
 502                         return true;
 503                 } else {
 504                         return false;
 505                 }
 506         }
 507
 508         /**
 509          * Does this EditPage class support section editing?
 510          * This is used by EditPage subclasses to indicate their ui cannot handle section edits
 511          *
 512          * @return bool
 513          */
 514         protected function isSectionEditSupported() {
 515                 return true;
 516         }
 517
 518         /**
 519          * Returns the URL to use in the form's action attribute.
 520          * This is used by EditPage subclasses when simply customizing the action
 521          * variable in the constructor is not enough. This can be used when the
 522          * EditPage lives inside of a Special page rather than a custom page action.
 523          *
 524          * @param $title Title object for which is being edited (where we go to for &action= links)
 525          * @return string
 526          */
 527         protected function getActionURL( Title $title ) {
 528                 return $title->getLocalURL( array( 'action' => $this->action ) );
 529         }
 530
 531         /**
 532          * @todo document
 533          * @param $request
 534          */
 535         function importFormData( &$request ) {
 536                 global $wgLang, $wgUser;
 537
 538                 wfProfileIn( __METHOD__ );
 539
 540                 # Section edit can come from either the form or a link
 541                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 542
 543                 if ( $request->wasPosted() ) {
 544                         # These fields need to be checked for encoding.
 545                         # Also remove trailing whitespace, but don't remove _initial_
 546                         # whitespace from the text boxes. This may be significant formatting.
 547                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 548                         if ( !$request->getCheck('wpTextbox2') ) {
 549                                 // Skip this if wpTextbox2 has input, it indicates that we came
 550                                 // from a conflict page with raw page text, not a custom form
 551                                 // modified by subclasses
 552                                 wfProfileIn( get_class($this)."::importContentFormData" );
 553                                 $textbox1 = $this->importContentFormData( $request );
 554                                 if ( isset($textbox1) )
 555                                         $this->textbox1 = $textbox1;
 556                                 wfProfileOut( get_class($this)."::importContentFormData" );
 557                         }
 558
 559                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 560                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary' ), 250, '' );
 561
 562                         # Remove extra headings from summaries and new sections.
 563                         $this->summary = preg_replace('/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary);
 564
 565                         $this->edittime = $request->getVal( 'wpEdittime' );
 566                         $this->starttime = $request->getVal( 'wpStarttime' );
 567
 568                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 569
 570                         if ( is_null( $this->edittime ) ) {
 571                                 # If the form is incomplete, force to preview.
 572                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 573                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 574                                 $this->preview = true;
 575                         } else {
 576                                 /* Fallback for live preview */
 577                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 578                                 $this->diff = $request->getCheck( 'wpDiff' );
 579
 580                                 // Remember whether a save was requested, so we can indicate
 581                                 // if we forced preview due to session failure.
 582                                 $this->mTriedSave = !$this->preview;
 583
 584                                 if ( $this->tokenOk( $request ) ) {
 585                                         # Some browsers will not report any submit button
 586                                         # if the user hits enter in the comment box.
 587                                         # The unmarked state will be assumed to be a save,
 588                                         # if the form seems otherwise complete.
 589                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 590                                 } else if ( $this->diff ) {
 591                                         # Failed token check, but only requested "Show Changes".
 592                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 593                                 } else {
 594                                         # Page might be a hack attempt posted from
 595                                         # an external site. Preview instead of saving.
 596                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 597                                         $this->preview = true;
 598                                 }
 599                         }
 600                         $this->save = !$this->preview && !$this->diff;
 601                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 602                                 $this->edittime = null;
 603                         }
 604
 605                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 606                                 $this->starttime = null;
 607                         }
 608
 609                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 610
 611                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 612                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 613
 614                         # Don't force edit summaries when a user is editing their own user or talk page
 615                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 616                                 $this->mTitle->getText() == $wgUser->getName() )
 617                         {
 618                                 $this->allowBlankSummary = true;
 619                         } else {
 620                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary');
 621                         }
 622
 623                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 624                 } else {
 625                         # Not a posted form? Start with nothing.
 626                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 627                         $this->textbox1  = '';
 628                         $this->summary   = '';
 629                         $this->edittime  = '';
 630                         $this->starttime = wfTimestampNow();
 631                         $this->edit      = false;
 632                         $this->preview   = false;
 633                         $this->save      = false;
 634                         $this->diff      = false;
 635                         $this->minoredit = false;
 636                         $this->watchthis = $request->getBool( 'watchthis', false ); // Watch may be overriden by request parameters
 637                         $this->recreate  = false;
 638
 639                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 640                                 $this->summary = $request->getVal( 'preloadtitle' );
 641                         }
 642                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 643                                 $this->summary = $request->getText( 'summary' );
 644                         }
 645
 646                         if ( $request->getVal( 'minor' ) ) {
 647                                 $this->minoredit = true;
 648                         }
 649                 }
 650
 651                 $this->bot = $request->getBool( 'bot', true );
 652                 $this->nosummary = $request->getBool( 'nosummary' );
 653
 654                 // FIXME: unused variable?
 655                 $this->oldid = $request->getInt( 'oldid' );
 656
 657                 $this->live = $request->getCheck( 'live' );
 658                 $this->editintro = $request->getText( 'editintro',
 659                         // Custom edit intro for new sections
 660                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 661
 662                 wfProfileOut( __METHOD__ );
 663
 664                 // Allow extensions to modify form data
 665                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 666         }
 667
 668         /**
 669          * Subpage overridable method for extracting the page content data from the
 670          * posted form to be placed in $this->textbox1, if using customized input
 671          * this method should be overrided and return the page text that will be used
 672          * for saving, preview parsing and so on...
 673          *
 674          * @param $request WebRequest
 675          */
 676         protected function importContentFormData( &$request ) {
 677                 return; // Don't do anything, EditPage already extracted wpTextbox1
 678         }
 679
 680         /**
 681          * Make sure the form isn't faking a user's credentials.
 682          *
 683          * @param $request WebRequest
 684          * @return bool
 685          * @private
 686          */
 687         function tokenOk( &$request ) {
 688                 global $wgUser;
 689                 $token = $request->getVal( 'wpEditToken' );
 690                 $this->mTokenOk = $wgUser->matchEditToken( $token );
 691                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
 692                 return $this->mTokenOk;
 693         }
 694
 695         /**
 696          * Show all applicable editing introductions
 697          */
 698         protected function showIntro() {
 699                 global $wgOut, $wgUser;
 700                 if ( $this->suppressIntro ) {
 701                         return;
 702                 }
 703
 704                 $namespace = $this->mTitle->getNamespace();
 705
 706                 if ( $namespace == NS_MEDIAWIKI ) {
 707                         # Show a warning if editing an interface message
 708                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
 709                 }
 710
 711                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
 712                 # Show log extract when the user is currently blocked
 713                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
 714                         $parts = explode( '/', $this->mTitle->getText(), 2 );
 715                         $username = $parts[0];
 716                         $user = User::newFromName( $username, false /* allow IP users*/ );
 717                         $ip = User::isIP( $username );
 718                         if ( !$user->isLoggedIn() && !$ip ) { # User does not exist
 719                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
 720                                         array( 'userpage-userdoesnotexist', $username ) );
 721                         } else if ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
 722                                 LogEventsList::showLogExtract(
 723                                         $wgOut,
 724                                         'block',
 725                                         $user->getUserPage()->getPrefixedText(),
 726                                         '',
 727                                         array(
 728                                                 'lim' => 1,
 729                                                 'showIfEmpty' => false,
 730                                                 'msgKey' => array(
 731                                                         'blocked-notice-logextract',
 732                                                         $user->getName() # Support GENDER in notice
 733                                                 )
 734                                         )
 735                                 );
 736                         }
 737                 }
 738                 # Try to add a custom edit intro, or use the standard one if this is not possible.
 739                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
 740                         if ( $wgUser->isLoggedIn() ) {
 741                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
 742                         } else {
 743                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
 744                         }
 745                 }
 746                 # Give a notice if the user is editing a deleted/moved page...
 747                 if ( !$this->mTitle->exists() ) {
 748                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle->getPrefixedText(),
 749                                 '', array( 'lim' => 10,
 750                                            'conds' => array( "log_action != 'revision'" ),
 751                                            'showIfEmpty' => false,
 752                                            'msgKey' => array( 'recreate-moveddeleted-warn') )
 753                         );
 754                 }
 755         }
 756
 757         /**
 758          * Attempt to show a custom editing introduction, if supplied
 759          *
 760          * @return bool
 761          */
 762         protected function showCustomIntro() {
 763                 if ( $this->editintro ) {
 764                         $title = Title::newFromText( $this->editintro );
 765                         if ( $title instanceof Title && $title->exists() && $title->userCanRead() ) {
 766                                 global $wgOut;
 767                                 $revision = Revision::newFromTitle( $title );
 768                                 $wgOut->addWikiTextTitleTidy( $revision->getText(), $this->mTitle );
 769                                 return true;
 770                         } else {
 771                                 return false;
 772                         }
 773                 } else {
 774                         return false;
 775                 }
 776         }
 777
 778         /**
 779          * Attempt submission (no UI)
 780          * @return one of the constants describing the result
 781          */
 782         function internalAttemptSave( &$result, $bot = false ) {
 783                 global $wgFilterCallback, $wgUser, $wgParser;
 784                 global $wgMaxArticleSize;
 785
 786                 wfProfileIn( __METHOD__  );
 787                 wfProfileIn( __METHOD__ . '-checks' );
 788
 789                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
 790                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
 791                         return self::AS_HOOK_ERROR;
 792                 }
 793
 794                 # Check image redirect
 795                 if ( $this->mTitle->getNamespace() == NS_FILE &&
 796                         Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
 797                         !$wgUser->isAllowed( 'upload' ) ) {
 798                                 if ( $wgUser->isAnon() ) {
 799                                         return self::AS_IMAGE_REDIRECT_ANON;
 800                                 } else {
 801                                         return self::AS_IMAGE_REDIRECT_LOGGED;
 802                                 }
 803                 }
 804
 805                 # Check for spam
 806                 $match = self::matchSummarySpamRegex( $this->summary );
 807                 if ( $match === false ) {
 808                         $match = self::matchSpamRegex( $this->textbox1 );
 809                 }
 810                 if ( $match !== false ) {
 811                         $result['spam'] = $match;
 812                         $ip = wfGetIP();
 813                         $pdbk = $this->mTitle->getPrefixedDBkey();
 814                         $match = str_replace( "\n", '', $match );
 815                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
 816                         wfProfileOut( __METHOD__ . '-checks' );
 817                         wfProfileOut( __METHOD__ );
 818                         return self::AS_SPAM_ERROR;
 819                 }
 820                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
 821                         # Error messages or other handling should be performed by the filter function
 822                         wfProfileOut( __METHOD__ . '-checks' );
 823                         wfProfileOut( __METHOD__ );
 824                         return self::AS_FILTERING;
 825                 }
 826                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
 827                         # Error messages etc. could be handled within the hook...
 828                         wfProfileOut( __METHOD__ . '-checks' );
 829                         wfProfileOut( __METHOD__ );
 830                         return self::AS_HOOK_ERROR;
 831                 } elseif ( $this->hookError != '' ) {
 832                         # ...or the hook could be expecting us to produce an error
 833                         wfProfileOut( __METHOD__ . '-checks' );
 834                         wfProfileOut( __METHOD__ );
 835                         return self::AS_HOOK_ERROR_EXPECTED;
 836                 }
 837                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 838                         # Check block state against master, thus 'false'.
 839                         wfProfileOut( __METHOD__ . '-checks' );
 840                         wfProfileOut( __METHOD__ );
 841                         return self::AS_BLOCKED_PAGE_FOR_USER;
 842                 }
 843                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
 844                 if ( $this->kblength > $wgMaxArticleSize ) {
 845                         // Error will be displayed by showEditForm()
 846                         $this->tooBig = true;
 847                         wfProfileOut( __METHOD__ . '-checks' );
 848                         wfProfileOut( __METHOD__ );
 849                         return self::AS_CONTENT_TOO_BIG;
 850                 }
 851
 852                 if ( !$wgUser->isAllowed( 'edit' ) ) {
 853                         if ( $wgUser->isAnon() ) {
 854                                 wfProfileOut( __METHOD__ . '-checks' );
 855                                 wfProfileOut( __METHOD__ );
 856                                 return self::AS_READ_ONLY_PAGE_ANON;
 857                         } else {
 858                                 wfProfileOut( __METHOD__ . '-checks' );
 859                                 wfProfileOut( __METHOD__ );
 860                                 return self::AS_READ_ONLY_PAGE_LOGGED;
 861                         }
 862                 }
 863
 864                 if ( wfReadOnly() ) {
 865                         wfProfileOut( __METHOD__ . '-checks' );
 866                         wfProfileOut( __METHOD__ );
 867                         return self::AS_READ_ONLY_PAGE;
 868                 }
 869                 if ( $wgUser->pingLimiter() ) {
 870                         wfProfileOut( __METHOD__ . '-checks' );
 871                         wfProfileOut( __METHOD__ );
 872                         return self::AS_RATE_LIMITED;
 873                 }
 874
 875                 # If the article has been deleted while editing, don't save it without
 876                 # confirmation
 877                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
 878                         wfProfileOut( __METHOD__ . '-checks' );
 879                         wfProfileOut( __METHOD__ );
 880                         return self::AS_ARTICLE_WAS_DELETED;
 881                 }
 882
 883                 wfProfileOut( __METHOD__ . '-checks' );
 884
 885                 # If article is new, insert it.
 886                 $aid = $this->mTitle->getArticleID( Title::GAID_FOR_UPDATE );
 887                 if ( 0 == $aid ) {
 888                         // Late check for create permission, just in case *PARANOIA*
 889                         if ( !$this->mTitle->userCan( 'create' ) ) {
 890                                 wfDebug( __METHOD__ . ": no create permission\n" );
 891                                 wfProfileOut( __METHOD__ );
 892                                 return self::AS_NO_CREATE_PERMISSION;
 893                         }
 894
 895                         # Don't save a new article if it's blank.
 896                         if ( $this->textbox1 == '' ) {
 897                                 wfProfileOut( __METHOD__ );
 898                                 return self::AS_BLANK_ARTICLE;
 899                         }
 900
 901                         // Run post-section-merge edit filter
 902                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
 903                                 # Error messages etc. could be handled within the hook...
 904                                 wfProfileOut( __METHOD__ );
 905                                 return self::AS_HOOK_ERROR;
 906                         } elseif ( $this->hookError != '' ) {
 907                                 # ...or the hook could be expecting us to produce an error
 908                                 wfProfileOut( __METHOD__ );
 909                                 return self::AS_HOOK_ERROR_EXPECTED;
 910                         }
 911
 912                         # Handle the user preference to force summaries here. Check if it's not a redirect.
 913                         if ( !$this->allowBlankSummary && !Title::newFromRedirect( $this->textbox1 ) ) {
 914                                 if ( md5( $this->summary ) == $this->autoSumm ) {
 915                                         $this->missingSummary = true;
 916                                         wfProfileOut( __METHOD__ );
 917                                         return self::AS_SUMMARY_NEEDED;
 918                                 }
 919                         }
 920
 921                         $isComment = ( $this->section == 'new' );
 922
 923                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 924                                 $this->minoredit, $this->watchthis, false, $isComment, $bot );
 925
 926                         wfProfileOut( __METHOD__ );
 927                         return self::AS_SUCCESS_NEW_ARTICLE;
 928                 }
 929
 930                 # Article exists. Check for edit conflict.
 931
 932                 $this->mArticle->clear(); # Force reload of dates, etc.
 933                 $this->mArticle->forUpdate( true ); # Lock the article
 934
 935                 wfDebug( "timestamp: {$this->mArticle->getTimestamp()}, edittime: {$this->edittime}\n" );
 936
 937                 if ( $this->mArticle->getTimestamp() != $this->edittime ) {
 938                         $this->isConflict = true;
 939                         if ( $this->section == 'new' ) {
 940                                 if ( $this->mArticle->getUserText() == $wgUser->getName() &&
 941                                         $this->mArticle->getComment() == $this->summary ) {
 942                                         // Probably a duplicate submission of a new comment.
 943                                         // This can happen when squid resends a request after
 944                                         // a timeout but the first one actually went through.
 945                                         wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
 946                                 } else {
 947                                         // New comment; suppress conflict.
 948                                         $this->isConflict = false;
 949                                         wfDebug( __METHOD__ .": conflict suppressed; new section\n" );
 950                                 }
 951                         }
 952                 }
 953                 $userid = $wgUser->getId();
 954
 955                 # Suppress edit conflict with self, except for section edits where merging is required.
 956                 if ( $this->isConflict && $this->section == '' && $this->userWasLastToEdit( $userid, $this->edittime ) ) {
 957                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
 958                         $this->isConflict = false;
 959                 }
 960
 961                 if ( $this->isConflict ) {
 962                         wfDebug( __METHOD__ . ": conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 963                                 $this->mArticle->getTimestamp() . "')\n" );
 964                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime );
 965                 } else {
 966                         wfDebug( __METHOD__ . ": getting section '$this->section'\n" );
 967                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary );
 968                 }
 969                 if ( is_null( $text ) ) {
 970                         wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
 971                         $this->isConflict = true;
 972                         $text = $this->textbox1; // do not try to merge here!
 973                 } else if ( $this->isConflict ) {
 974                         # Attempt merge
 975                         if ( $this->mergeChangesInto( $text ) ) {
 976                                 // Successful merge! Maybe we should tell the user the good news?
 977                                 $this->isConflict = false;
 978                                 wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
 979                         } else {
 980                                 $this->section = '';
 981                                 $this->textbox1 = $text;
 982                                 wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
 983                         }
 984                 }
 985
 986                 if ( $this->isConflict ) {
 987                         wfProfileOut( __METHOD__ );
 988                         return self::AS_CONFLICT_DETECTED;
 989                 }
 990
 991                 $oldtext = $this->mArticle->getContent();
 992
 993                 // Run post-section-merge edit filter
 994                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError, $this->summary ) ) ) {
 995                         # Error messages etc. could be handled within the hook...
 996                         wfProfileOut( __METHOD__ );
 997                         return self::AS_HOOK_ERROR;
 998                 } elseif ( $this->hookError != '' ) {
 999                         # ...or the hook could be expecting us to produce an error
1000                         wfProfileOut( __METHOD__ );
1001                         return self::AS_HOOK_ERROR_EXPECTED;
1002                 }
1003
1004                 # Handle the user preference to force summaries here, but not for null edits
1005                 if ( $this->section != 'new' && !$this->allowBlankSummary && 0 != strcmp( $oldtext, $text )
1006                         && !Title::newFromRedirect( $text ) ) # check if it's not a redirect
1007                 {
1008                         if ( md5( $this->summary ) == $this->autoSumm ) {
1009                                 $this->missingSummary = true;
1010                                 wfProfileOut( __METHOD__ );
1011                                 return self::AS_SUMMARY_NEEDED;
1012                         }
1013                 }
1014
1015                 # And a similar thing for new sections
1016                 if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1017                         if ( trim( $this->summary ) == '' ) {
1018                                 $this->missingSummary = true;
1019                                 wfProfileOut( __METHOD__ );
1020                                 return self::AS_SUMMARY_NEEDED;
1021                         }
1022                 }
1023
1024                 # All's well
1025                 wfProfileIn( __METHOD__ . '-sectionanchor' );
1026                 $sectionanchor = '';
1027                 if ( $this->section == 'new' ) {
1028                         if ( $this->textbox1 == '' ) {
1029                                 $this->missingComment = true;
1030                                 wfProfileOut( __METHOD__ . '-sectionanchor' );
1031                                 wfProfileOut( __METHOD__ );
1032                                 return self::AS_TEXTBOX_EMPTY;
1033                         }
1034                         if ( $this->summary != '' ) {
1035                                 $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1036                                 # This is a new section, so create a link to the new section
1037                                 # in the revision summary.
1038                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
1039                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1040                         }
1041                 } elseif ( $this->section != '' ) {
1042                         # Try to get a section anchor from the section source, redirect to edited section if header found
1043                         # XXX: might be better to integrate this into Article::replaceSection
1044                         # for duplicate heading checking and maybe parsing
1045                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1046                         # we can't deal with anchors, includes, html etc in the header for now,
1047                         # headline would need to be parsed to improve this
1048                         if ( $hasmatch and strlen( $matches[2] ) > 0 ) {
1049                                 $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1050                         }
1051                 }
1052                 wfProfileOut( __METHOD__ . '-sectionanchor' );
1053
1054                 // Save errors may fall down to the edit form, but we've now
1055                 // merged the section into full text. Clear the section field
1056                 // so that later submission of conflict forms won't try to
1057                 // replace that into a duplicated mess.
1058                 $this->textbox1 = $text;
1059                 $this->section = '';
1060
1061                 // Check for length errors again now that the section is merged in
1062                 $this->kblength = (int)( strlen( $text ) / 1024 );
1063                 if ( $this->kblength > $wgMaxArticleSize ) {
1064                         $this->tooBig = true;
1065                         wfProfileOut( __METHOD__ );
1066                         return self::AS_MAX_ARTICLE_SIZE_EXCEEDED;
1067                 }
1068
1069                 # update the article here
1070                 if ( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
1071                         $this->watchthis, $bot, $sectionanchor ) )
1072                 {
1073                         wfProfileOut( __METHOD__ );
1074                         return self::AS_SUCCESS_UPDATE;
1075                 } else {
1076                         $this->isConflict = true;
1077                 }
1078                 wfProfileOut( __METHOD__ );
1079                 return self::AS_END;
1080         }
1081
1082         /**
1083          * Check if no edits were made by other users since
1084          * the time a user started editing the page. Limit to
1085          * 50 revisions for the sake of performance.
1086          */
1087         protected function userWasLastToEdit( $id, $edittime ) {
1088                 if( !$id ) return false;
1089                 $dbw = wfGetDB( DB_MASTER );
1090                 $res = $dbw->select( 'revision',
1091                         'rev_user',
1092                         array(
1093                                 'rev_page' => $this->mArticle->getId(),
1094                                 'rev_timestamp > '.$dbw->addQuotes( $dbw->timestamp($edittime) )
1095                         ),
1096                         __METHOD__,
1097                         array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
1098                 foreach ( $res as $row ) {
1099                         if( $row->rev_user != $id ) {
1100                                 return false;
1101                         }
1102                 }
1103                 return true;
1104         }
1105
1106         /**
1107          * Check given input text against $wgSpamRegex, and return the text of the first match.
1108          * @return mixed -- matching string or false
1109          */
1110         public static function matchSpamRegex( $text ) {
1111                 global $wgSpamRegex;
1112                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1113                 $regexes = (array)$wgSpamRegex;
1114                 return self::matchSpamRegexInternal( $text, $regexes );
1115         }
1116
1117         /**
1118          * Check given input text against $wgSpamRegex, and return the text of the first match.
1119          * @return mixed -- matching string or false
1120          */
1121         public static function matchSummarySpamRegex( $text ) {
1122                 global $wgSummarySpamRegex;
1123                 $regexes = (array)$wgSummarySpamRegex;
1124                 return self::matchSpamRegexInternal( $text, $regexes );
1125         }
1126
1127         protected static function matchSpamRegexInternal( $text, $regexes ) {
1128                 foreach( $regexes as $regex ) {
1129                         $matches = array();
1130                         if( preg_match( $regex, $text, $matches ) ) {
1131                                 return $matches[0];
1132                         }
1133                 }
1134                 return false;
1135         }
1136
1137         /**
1138          * Initialise form fields in the object
1139          * Called on the first invocation, e.g. when a user clicks an edit link
1140          * @returns bool -- if the requested section is valid
1141          */
1142         function initialiseForm() {
1143                 global $wgUser;
1144                 $this->edittime = $this->mArticle->getTimestamp();
1145                 $this->textbox1 = $this->getContent( false );
1146                 // activate checkboxes if user wants them to be always active
1147                 # Sort out the "watch" checkbox
1148                 if ( $wgUser->getOption( 'watchdefault' ) ) {
1149                         # Watch all edits
1150                         $this->watchthis = true;
1151                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1152                         # Watch creations
1153                         $this->watchthis = true;
1154                 } elseif ( $this->mTitle->userIsWatching() ) {
1155                         # Already watched
1156                         $this->watchthis = true;
1157                 }
1158                 if ( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
1159                 if ( $this->textbox1 === false ) return false;
1160                 wfProxyCheck();
1161                 return true;
1162         }
1163
1164         function setHeaders() {
1165                 global $wgOut, $wgTitle;
1166                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1167                 if ( $this->formtype == 'preview' ) {
1168                         $wgOut->setPageTitleActionText( wfMsg( 'preview' ) );
1169                 }
1170                 if ( $this->isConflict ) {
1171                         $wgOut->setPageTitle( wfMsg( 'editconflict', $wgTitle->getPrefixedText() ) );
1172                 } elseif ( $this->section != '' ) {
1173                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1174                         $wgOut->setPageTitle( wfMsg( $msg, $wgTitle->getPrefixedText() ) );
1175                 } else {
1176                         # Use the title defined by DISPLAYTITLE magic word when present
1177                         if ( isset( $this->mParserOutput )
1178                          && ( $dt = $this->mParserOutput->getDisplayTitle() ) !== false ) {
1179                                 $title = $dt;
1180                         } else {
1181                                 $title = $wgTitle->getPrefixedText();
1182                         }
1183                         $wgOut->setPageTitle( wfMsg( 'editing', $title ) );
1184                 }
1185         }
1186
1187         /**
1188          * Send the edit form and related headers to $wgOut
1189          * @param $formCallback Optional callable that takes an OutputPage
1190          *                      parameter; will be called during form output
1191          *                      near the top, for captchas and the like.
1192          */
1193         function showEditForm( $formCallback = null ) {
1194                 global $wgOut, $wgUser, $wgTitle;
1195
1196                 # If $wgTitle is null, that means we're in API mode.
1197                 # Some hook probably called this function  without checking
1198                 # for is_null($wgTitle) first. Bail out right here so we don't
1199                 # do lots of work just to discard it right after.
1200                 if ( is_null( $wgTitle ) )
1201                         return;
1202
1203                 wfProfileIn( __METHOD__ );
1204
1205                 $sk = $wgUser->getSkin();
1206
1207                 #need to parse the preview early so that we know which templates are used,
1208                 #otherwise users with "show preview after edit box" will get a blank list
1209                 #we parse this near the beginning so that setHeaders can do the title
1210                 #setting work instead of leaving it in getPreviewText
1211                 $previewOutput = '';
1212                 if ( $this->formtype == 'preview' ) {
1213                         $previewOutput = $this->getPreviewText();
1214                 }
1215
1216                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) );
1217
1218                 $this->setHeaders();
1219
1220                 # Enabled article-related sidebar, toplinks, etc.
1221                 $wgOut->setArticleRelated( true );
1222
1223                 if ( $this->showHeader() === false )
1224                         return;
1225
1226                 $action = htmlspecialchars($this->getActionURL($wgTitle));
1227
1228                 if ( $wgUser->getOption( 'showtoolbar' ) and !$this->isCssJsSubpage ) {
1229                         # prepare toolbar for edit buttons
1230                         $toolbar = EditPage::getEditToolbar();
1231                 } else {
1232                         $toolbar = '';
1233                 }
1234
1235
1236                 $wgOut->addHTML( $this->editFormPageTop );
1237
1238                 if ( $wgUser->getOption( 'previewontop' ) ) {
1239                         $this->displayPreviewArea( $previewOutput, true );
1240                 }
1241
1242                 $wgOut->addHTML( $this->editFormTextTop );
1243
1244                 $templates = $this->getTemplates();
1245                 $formattedtemplates = $sk->formatTemplates( $templates, $this->preview, $this->section != '');
1246
1247                 $hiddencats = $this->mArticle->getHiddenCategories();
1248                 $formattedhiddencats = $sk->formatHiddenCategories( $hiddencats );
1249
1250                 if ( $this->wasDeletedSinceLastEdit() && 'save' != $this->formtype ) {
1251                         $wgOut->wrapWikiMsg(
1252                                 "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
1253                                 'deletedwhileediting' );
1254                 } elseif ( $this->wasDeletedSinceLastEdit() ) {
1255                         // Hide the toolbar and edit area, user can click preview to get it back
1256                         // Add an confirmation checkbox and explanation.
1257                         $toolbar = '';
1258                         // @todo move this to a cleaner conditional instead of blanking a variable
1259                 }
1260                 $wgOut->addHTML( <<<HTML
1261 {$toolbar}
1262 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1263 HTML
1264 );
1265
1266                 if ( is_callable( $formCallback ) ) {
1267                         call_user_func_array( $formCallback, array( &$wgOut ) );
1268                 }
1269
1270                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1271
1272                 // Put these up at the top to ensure they aren't lost on early form submission
1273                 $this->showFormBeforeText();
1274
1275                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
1276                         $wgOut->addHTML(
1277                                 '<div class="mw-confirm-recreate">' .
1278                                 $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ) ) .
1279                                 Xml::checkLabel( wfMsg( 'recreate' ), 'wpRecreate', 'wpRecreate', false,
1280                                         array( 'title' => $sk->titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
1281                                 ) .
1282                                 '</div>'
1283                         );
1284                 }
1285
1286                 # If a blank edit summary was previously provided, and the appropriate
1287                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1288                 # user being bounced back more than once in the event that a summary
1289                 # is not required.
1290                 #####
1291                 # For a bit more sophisticated detection of blank summaries, hash the
1292                 # automatic one and pass that in the hidden field wpAutoSummary.
1293                 if ( $this->missingSummary ||
1294                         ( $this->section == 'new' && $this->nosummary ) )
1295                                 $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
1296                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1297                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
1298
1299                 $wgOut->addHTML( Html::hidden( 'oldid', $this->mArticle->getOldID() ) );
1300
1301                 if ( $this->section == 'new' ) {
1302                         $this->showSummaryInput( true, $this->summary );
1303                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
1304                 }
1305
1306                 $wgOut->addHTML( $this->editFormTextBeforeContent );
1307
1308                 if ( $this->isConflict ) {
1309                         // In an edit conflict bypass the overrideable content form method
1310                         // and fallback to the raw wpTextbox1 since editconflicts can't be
1311                         // resolved between page source edits and custom ui edits using the
1312                         // custom edit ui.
1313                         $this->showTextbox1( null, $this->getContent() );
1314                 } else {
1315                         $this->showContentForm();
1316                 }
1317
1318                 $wgOut->addHTML( $this->editFormTextAfterContent );
1319
1320                 $wgOut->addWikiText( $this->getCopywarn() );
1321                 if ( isset($this->editFormTextAfterWarn) && $this->editFormTextAfterWarn !== '' )
1322                         $wgOut->addHTML( $this->editFormTextAfterWarn );
1323
1324                 $this->showStandardInputs();
1325
1326                 $this->showFormAfterText();
1327
1328                 $this->showTosSummary();
1329                 $this->showEditTools();
1330
1331                 $wgOut->addHTML( <<<HTML
1332 {$this->editFormTextAfterTools}
1333 <div class='templatesUsed'>
1334 {$formattedtemplates}
1335 </div>
1336 <div class='hiddencats'>
1337 {$formattedhiddencats}
1338 </div>
1339 HTML
1340 );
1341
1342                 if ( $this->isConflict )
1343                         $this->showConflict();
1344
1345                 $wgOut->addHTML( $this->editFormTextBottom );
1346                 $wgOut->addHTML( "</form>\n" );
1347                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1348                         $this->displayPreviewArea( $previewOutput, false );
1349                 }
1350
1351                 wfProfileOut( __METHOD__ );
1352         }
1353
1354         protected function showHeader() {
1355                 global $wgOut, $wgUser, $wgTitle, $wgMaxArticleSize, $wgLang;
1356                 if ( $this->isConflict ) {
1357                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
1358                         $this->edittime = $this->mArticle->getTimestamp();
1359                 } else {
1360                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
1361                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
1362                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
1363                                 // Someone is welcome to try refactoring though
1364                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
1365                                 return false;
1366                         }
1367
1368                         if ( $this->section != '' && $this->section != 'new' ) {
1369                                 $matches = array();
1370                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
1371                                         preg_match( "/^(=+)(.+)\\1/mi", $this->textbox1, $matches );
1372                                         if ( !empty( $matches[2] ) ) {
1373                                                 global $wgParser;
1374                                                 $this->summary = "/* " .
1375                                                         $wgParser->stripSectionName(trim($matches[2])) .
1376                                                         " */ ";
1377                                         }
1378                                 }
1379                         }
1380
1381                         if ( $this->missingComment ) {
1382                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
1383                         }
1384
1385                         if ( $this->missingSummary && $this->section != 'new' ) {
1386                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
1387                         }
1388
1389                         if ( $this->missingSummary && $this->section == 'new' ) {
1390                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
1391                         }
1392
1393                         if ( $this->hookError !== '' ) {
1394                                 $wgOut->addWikiText( $this->hookError );
1395                         }
1396
1397                         if ( !$this->checkUnicodeCompliantBrowser() ) {
1398                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
1399                         }
1400
1401                         if ( isset( $this->mArticle ) && isset( $this->mArticle->mRevision ) ) {
1402                         // Let sysop know that this will make private content public if saved
1403
1404                                 if ( !$this->mArticle->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1405                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
1406                                 } else if ( $this->mArticle->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1407                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
1408                                 }
1409
1410                                 if ( !$this->mArticle->mRevision->isCurrent() ) {
1411                                         $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
1412                                         $wgOut->addWikiMsg( 'editingold' );
1413                                 }
1414                         }
1415                 }
1416
1417                 if ( wfReadOnly() ) {
1418                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
1419                 } elseif ( $wgUser->isAnon() ) {
1420                         if ( $this->formtype != 'preview' ) {
1421                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
1422                         } else {
1423                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
1424                         }
1425                 } else {
1426                         if ( $this->isCssJsSubpage ) {
1427                                 # Check the skin exists
1428                                 if ( $this->isWrongCaseCssJsPage ) {
1429                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $wgTitle->getSkinFromCssJsSubpage() ) );
1430                                 }
1431                                 if ( $this->formtype !== 'preview' ) {
1432                                         if ( $this->isCssSubpage )
1433                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
1434                                         if ( $this->isJsSubpage )
1435                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
1436                                 }
1437                         }
1438                 }
1439
1440                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
1441                         # Is the title semi-protected?
1442                         if ( $this->mTitle->isSemiProtected() ) {
1443                                 $noticeMsg = 'semiprotectedpagewarning';
1444                         } else {
1445                                 # Then it must be protected based on static groups (regular)
1446                                 $noticeMsg = 'protectedpagewarning';
1447                         }
1448                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle->getPrefixedText(), '',
1449                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
1450                 }
1451                 if ( $this->mTitle->isCascadeProtected() ) {
1452                         # Is this page under cascading protection from some source pages?
1453                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1454                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
1455                         $cascadeSourcesCount = count( $cascadeSources );
1456                         if ( $cascadeSourcesCount > 0 ) {
1457                                 # Explain, and list the titles responsible
1458                                 foreach( $cascadeSources as $page ) {
1459                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1460                                 }
1461                         }
1462                         $notice .= '</div>';
1463                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
1464                 }
1465                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
1466                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle->getPrefixedText(), '',
1467                                 array(  'lim' => 1,
1468                                         'showIfEmpty' => false,
1469                                         'msgKey' => array( 'titleprotectedwarning' ),
1470                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
1471                 }
1472
1473                 if ( $this->kblength === false ) {
1474                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1475                 }
1476
1477                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
1478                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
1479                                 array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
1480                 } else {
1481                         $msg = 'longpage-hint';
1482                         $text = wfMsg( $msg );
1483                         if( !wfEmptyMsg( $msg, $text ) && $text !== '-' ) {
1484                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
1485                                         array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
1486                                 );
1487                         }
1488                 }
1489         }
1490
1491         /**
1492          * Standard summary input and label (wgSummary), abstracted so EditPage
1493          * subclasses may reorganize the form.
1494          * Note that you do not need to worry about the label's for=, it will be
1495          * inferred by the id given to the input. You can remove them both by
1496          * passing array( 'id' => false ) to $userInputAttrs.
1497          *
1498          * @param $summary The value of the summary input
1499          * @param $labelText The html to place inside the label
1500          * @param $inputAttrs An array of attrs to use on the input
1501          * @param $spanLabelAttrs An array of attrs to use on the span inside the label
1502          *
1503          * @return array An array in the format array( $label, $input )
1504          */
1505         function getSummaryInput($summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null) {
1506                 global $wgUser;
1507                 //Note: the maxlength is overriden in JS to 250 and to make it use UTF-8 bytes, not characters.
1508                 $inputAttrs = ( is_array($inputAttrs) ? $inputAttrs : array() ) + array(
1509                         'id' => 'wpSummary',
1510                         'maxlength' => '200',
1511                         'tabindex' => '1',
1512                         'size' => 60,
1513                         'spellcheck' => 'true',
1514                 ) + $wgUser->getSkin()->tooltipAndAccessKeyAttribs( 'summary' );
1515
1516                 $spanLabelAttrs = ( is_array($spanLabelAttrs) ? $spanLabelAttrs : array() ) + array(
1517                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
1518                         'id' => "wpSummaryLabel"
1519                 );
1520
1521                 $label = null;
1522                 if ( $labelText ) {
1523                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
1524                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
1525                 }
1526
1527                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
1528
1529                 return array( $label, $input );
1530         }
1531
1532         /**
1533          * @param $isSubjectPreview Boolean: true if this is the section subject/title
1534          *                          up top, or false if this is the comment summary
1535          *                          down below the textarea
1536          * @param $summary String: The text of the summary to display
1537          * @return String
1538          */
1539         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
1540                 global $wgOut, $wgContLang;
1541                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
1542                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
1543                 if ( $isSubjectPreview ) {
1544                         if ( $this->nosummary )
1545                                 return;
1546                 } else {
1547                         if ( !$this->mShowSummaryField )
1548                                 return;
1549                 }
1550                 $summary = $wgContLang->recodeForEdit( $summary );
1551                 $labelText = wfMsgExt( $isSubjectPreview ? 'subject' : 'summary', 'parseinline' );
1552                 list($label, $input) = $this->getSummaryInput($summary, $labelText, array( 'class' => $summaryClass ), array());
1553                 $wgOut->addHTML("{$label} {$input}");
1554         }
1555
1556         /**
1557          * @param $isSubjectPreview Boolean: true if this is the section subject/title
1558          *                          up top, or false if this is the comment summary
1559          *                          down below the textarea
1560          * @param $summary String: the text of the summary to display
1561          * @return String
1562          */
1563         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
1564                 if ( !$summary || ( !$this->preview && !$this->diff ) )
1565                         return "";
1566
1567                 global $wgParser, $wgUser;
1568                 $sk = $wgUser->getSkin();
1569
1570                 if ( $isSubjectPreview )
1571                         $summary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $summary ) );
1572
1573                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
1574
1575                 $summary = wfMsgExt( $message, 'parseinline' ) . $sk->commentBlock( $summary, $this->mTitle, $isSubjectPreview );
1576                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
1577         }
1578
1579         protected function showFormBeforeText() {
1580                 global $wgOut;
1581                 $section = htmlspecialchars( $this->section );
1582                 $wgOut->addHTML( <<<HTML
1583 <input type='hidden' value="{$section}" name="wpSection" />
1584 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
1585 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
1586 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
1587
1588 HTML
1589                 );
1590                 if ( !$this->checkUnicodeCompliantBrowser() )
1591                         $wgOut->addHTML(Html::hidden( 'safemode', '1' ));
1592         }
1593
1594         protected function showFormAfterText() {
1595                 global $wgOut, $wgUser;
1596                 /**
1597                  * To make it harder for someone to slip a user a page
1598                  * which submits an edit form to the wiki without their
1599                  * knowledge, a random token is associated with the login
1600                  * session. If it's not passed back with the submission,
1601                  * we won't save the page, or render user JavaScript and
1602                  * CSS previews.
1603                  *
1604                  * For anon editors, who may not have a session, we just
1605                  * include the constant suffix to prevent editing from
1606                  * broken text-mangling proxies.
1607                  */
1608                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->editToken() ) . "\n" );
1609         }
1610
1611         /**
1612          * Subpage overridable method for printing the form for page content editing
1613          * By default this simply outputs wpTextbox1
1614          * Subclasses can override this to provide a custom UI for editing;
1615          * be it a form, or simply wpTextbox1 with a modified content that will be
1616          * reverse modified when extracted from the post data.
1617          * Note that this is basically the inverse for importContentFormData
1618          */
1619         protected function showContentForm() {
1620                 $this->showTextbox1();
1621         }
1622
1623         /**
1624          * Method to output wpTextbox1
1625          * The $textoverride method can be used by subclasses overriding showContentForm
1626          * to pass back to this method.
1627          *
1628          * @param $customAttribs An array of html attributes to use in the textarea
1629          * @param $textoverride String: optional text to override $this->textarea1 with
1630          */
1631         protected function showTextbox1($customAttribs = null, $textoverride = null) {
1632                 $classes = array(); // Textarea CSS
1633                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
1634                         # Is the title semi-protected?
1635                         if ( $this->mTitle->isSemiProtected() ) {
1636                                 $classes[] = 'mw-textarea-sprotected';
1637                         } else {
1638                                 # Then it must be protected based on static groups (regular)
1639                                 $classes[] = 'mw-textarea-protected';
1640                         }
1641                 }
1642                 $attribs = array( 'tabindex' => 1 );
1643                 if ( is_array($customAttribs) )
1644                         $attribs += $customAttribs;
1645
1646                 if ( $this->wasDeletedSinceLastEdit() )
1647                         $attribs['type'] = 'hidden';
1648                 if ( !empty( $classes ) ) {
1649                         if ( isset($attribs['class']) )
1650                                 $classes[] = $attribs['class'];
1651                         $attribs['class'] = implode( ' ', $classes );
1652                 }
1653
1654                 $this->showTextbox( isset($textoverride) ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
1655         }
1656
1657         protected function showTextbox2() {
1658                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6 ) );
1659         }
1660
1661         protected function showTextbox( $content, $name, $customAttribs = array() ) {
1662                 global $wgOut, $wgUser;
1663
1664                 $wikitext = $this->safeUnicodeOutput( $content );
1665                 if ( $wikitext !== '' ) {
1666                         // Ensure there's a newline at the end, otherwise adding lines
1667                         // is awkward.
1668                         // But don't add a newline if the ext is empty, or Firefox in XHTML
1669                         // mode will show an extra newline. A bit annoying.
1670                         $wikitext .= "\n";
1671                 }
1672
1673                 $attribs = $customAttribs + array(
1674                         'accesskey' => ',',
1675                         'id'   => $name,
1676                         'cols' => $wgUser->getIntOption( 'cols' ),
1677                         'rows' => $wgUser->getIntOption( 'rows' ),
1678                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
1679                 );
1680
1681                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
1682         }
1683
1684         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
1685                 global $wgOut;
1686                 $classes = array();
1687                 if ( $isOnTop )
1688                         $classes[] = 'ontop';
1689
1690                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
1691
1692                 if ( $this->formtype != 'preview' )
1693                         $attribs['style'] = 'display: none;';
1694
1695                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
1696
1697                 if ( $this->formtype == 'preview' ) {
1698                         $this->showPreview( $previewOutput );
1699                 }
1700
1701                 $wgOut->addHTML( '</div>' );
1702
1703                 if ( $this->formtype == 'diff') {
1704                         $this->showDiff();
1705                 }
1706         }
1707
1708         /**
1709          * Append preview output to $wgOut.
1710          * Includes category rendering if this is a category page.
1711          *
1712          * @param $text String: the HTML to be output for the preview.
1713          */
1714         protected function showPreview( $text ) {
1715                 global $wgOut;
1716                 if ( $this->mTitle->getNamespace() == NS_CATEGORY) {
1717                         $this->mArticle->openShowCategory();
1718                 }
1719                 # This hook seems slightly odd here, but makes things more
1720                 # consistent for extensions.
1721                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
1722                 $wgOut->addHTML( $text );
1723                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1724                         $this->mArticle->closeShowCategory();
1725                 }
1726         }
1727
1728         /**
1729          * Give a chance for site and per-namespace customizations of
1730          * terms of service summary link that might exist separately
1731          * from the copyright notice.
1732          *
1733          * This will display between the save button and the edit tools,
1734          * so should remain short!
1735          */
1736         protected function showTosSummary() {
1737                 $msg = 'editpage-tos-summary';
1738                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
1739                 $text = wfMsg( $msg );
1740                 if( !wfEmptyMsg( $msg, $text ) && $text !== '-' ) {
1741                         global $wgOut;
1742                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
1743                         $wgOut->addWikiMsgArray( $msg, array() );
1744                         $wgOut->addHTML( '</div>' );
1745                 }
1746         }
1747
1748         protected function showEditTools() {
1749                 global $wgOut;
1750                 $wgOut->addHTML( '<div class="mw-editTools">' );
1751                 $wgOut->addWikiMsgArray( 'edittools', array(), array( 'content' ) );
1752                 $wgOut->addHTML( '</div>' );
1753         }
1754
1755         protected function getCopywarn() {
1756                 global $wgRightsText;
1757                 if ( $wgRightsText ) {
1758                         $copywarnMsg = array( 'copyrightwarning',
1759                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
1760                                 $wgRightsText );
1761                 } else {
1762                         $copywarnMsg = array( 'copyrightwarning2',
1763                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
1764                 }
1765                 // Allow for site and per-namespace customization of contribution/copyright notice.
1766                 wfRunHooks( 'EditPageCopyrightWarning', array( $this->mTitle, &$copywarnMsg ) );
1767
1768                 return "<div id=\"editpage-copywarn\">\n" . call_user_func_array("wfMsgNoTrans", $copywarnMsg) . "\n</div>";
1769         }
1770
1771         protected function showStandardInputs( &$tabindex = 2 ) {
1772                 global $wgOut, $wgUser;
1773                 $wgOut->addHTML( "<div class='editOptions'>\n" );
1774
1775                 if ( $this->section != 'new' ) {
1776                         $this->showSummaryInput( false, $this->summary );
1777                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
1778                 }
1779
1780                 $checkboxes = $this->getCheckboxes( $tabindex, $wgUser->getSkin(),
1781                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
1782                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
1783                 $wgOut->addHTML( "<div class='editButtons'>\n" );
1784                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
1785
1786                 $cancel = $this->getCancelLink();
1787                 $separator = wfMsgExt( 'pipe-separator' , 'escapenoentities' );
1788                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ) );
1789                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
1790                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
1791                         htmlspecialchars( wfMsg( 'newwindow' ) );
1792                 $wgOut->addHTML( "      <span class='editHelp'>{$cancel}{$separator}{$edithelp}</span>\n" );
1793                 $wgOut->addHTML( "</div><!-- editButtons -->\n</div><!-- editOptions -->\n" );
1794         }
1795
1796         /*
1797          * Show an edit conflict. textbox1 is already shown in showEditForm().
1798          * If you want to use another entry point to this function, be careful.
1799          */
1800         protected function showConflict() {
1801                 global $wgOut;
1802                 $this->textbox2 = $this->textbox1;
1803                 $this->textbox1 = $this->getContent();
1804                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
1805                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
1806
1807                         $de = new DifferenceEngine( $this->mTitle );
1808                         $de->setText( $this->textbox2, $this->textbox1 );
1809                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1810
1811                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
1812                         $this->showTextbox2();
1813                 }
1814         }
1815
1816         protected function getLastDelete() {
1817                 $dbr = wfGetDB( DB_SLAVE );
1818                 $data = $dbr->selectRow(
1819                         array( 'logging', 'user' ),
1820                         array( 'log_type',
1821                                'log_action',
1822                                'log_timestamp',
1823                                'log_user',
1824                                'log_namespace',
1825                                'log_title',
1826                                'log_comment',
1827                                'log_params',
1828                                'log_deleted',
1829                                'user_name' ),
1830                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1831                                'log_title' => $this->mTitle->getDBkey(),
1832                                'log_type' => 'delete',
1833                                'log_action' => 'delete',
1834                                'user_id=log_user' ),
1835                         __METHOD__,
1836                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
1837                 );
1838                 // Quick paranoid permission checks...
1839                 if( is_object( $data ) ) {
1840                         if( $data->log_deleted & LogPage::DELETED_USER )
1841                                 $data->user_name = wfMsgHtml( 'rev-deleted-user' );
1842                         if( $data->log_deleted & LogPage::DELETED_COMMENT )
1843                                 $data->log_comment = wfMsgHtml( 'rev-deleted-comment' );
1844                 }
1845                 return $data;
1846         }
1847
1848         /**
1849          * Get the rendered text for previewing.
1850          * @return string
1851          */
1852         function getPreviewText() {
1853                 global $wgOut, $wgUser, $wgParser, $wgMessageCache;
1854
1855                 wfProfileIn( __METHOD__ );
1856
1857                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1858                         if ( $this->mTokenOkExceptSuffix ) {
1859                                 $note = wfMsg( 'token_suffix_mismatch' );
1860                         } else {
1861                                 $note = wfMsg( 'session_fail_preview' );
1862                         }
1863                 } else {
1864                         $note = wfMsg( 'previewnote' );
1865                 }
1866
1867                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1868                 $parserOptions->setEditSection( false );
1869                 $parserOptions->setIsPreview( true );
1870                 $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
1871
1872                 global $wgRawHtml;
1873                 if ( $wgRawHtml && !$this->mTokenOk ) {
1874                         // Could be an offsite preview attempt. This is very unsafe if
1875                         // HTML is enabled, as it could be an attack.
1876                         return $wgOut->parse( "<div class='previewnote'>" .
1877                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1878                 }
1879
1880                 # don't parse user css/js, show message about preview
1881                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1882
1883                 if ( $this->isCssJsSubpage ) {
1884                         if (preg_match( "/\\.css$/", $this->mTitle->getText() ) ) {
1885                                 $previewtext = "<div id='mw-usercsspreview'>\n" . wfMsg( 'usercsspreview' ) . "\n</div>";
1886                         } else if (preg_match( "/\\.js$/", $this->mTitle->getText() ) ) {
1887                                 $previewtext = "<div id='mw-userjspreview'>\n" . wfMsg( 'userjspreview' ) . "\n</div>";
1888                         }
1889                         $parserOptions->setTidy( true );
1890                         $parserOutput = $wgParser->parse( $previewtext, $this->mTitle, $parserOptions );
1891                         $previewHTML = $parserOutput->mText;
1892                 } else {
1893                         $rt = Title::newFromRedirectArray( $this->textbox1 );
1894                         if ( $rt ) {
1895                                 $previewHTML = $this->mArticle->viewRedirect( $rt, false );
1896                         } else {
1897                                 $toparse = $this->textbox1;
1898
1899                                 # If we're adding a comment, we need to show the
1900                                 # summary as the headline
1901                                 if ( $this->section == "new" && $this->summary != "" ) {
1902                                         $toparse = "== {$this->summary} ==\n\n" . $toparse;
1903                                 }
1904
1905                                 wfRunHooks( 'EditPageGetPreviewText', array( $this, &$toparse ) );
1906
1907                                 // Parse mediawiki messages with correct target language
1908                                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1909                                         list( /* $unused */, $lang ) = $wgMessageCache->figureMessage( $this->mTitle->getText() );
1910                                         $obj = wfGetLangObj( $lang );
1911                                         $parserOptions->setTargetLanguage( $obj );
1912                                 }
1913
1914                                 $parserOptions->setTidy( true );
1915                                 $parserOptions->enableLimitReport();
1916                                 $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ),
1917                                         $this->mTitle, $parserOptions );
1918
1919                                 $previewHTML = $parserOutput->getText();
1920                                 $this->mParserOutput = $parserOutput;
1921                                 $wgOut->addParserOutputNoText( $parserOutput );
1922
1923                                 if ( count( $parserOutput->getWarnings() ) ) {
1924                                         $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
1925                                 }
1926                         }
1927                 }
1928
1929                 if( $this->isConflict ) {
1930                         $conflict = '<h2 id="mw-previewconflict">' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1931                 } else {
1932                         $conflict = '<hr />';
1933                 }
1934
1935                 $previewhead = "<div class='previewnote'>\n" .
1936                         '<h2 id="mw-previewheader">' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>" .
1937                         $wgOut->parse( $note ) . $conflict . "</div>\n";
1938
1939                 wfProfileOut( __METHOD__ );
1940                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
1941         }
1942
1943         function getTemplates() {
1944                 if ( $this->preview || $this->section != '' ) {
1945                         $templates = array();
1946                         if ( !isset( $this->mParserOutput ) ) return $templates;
1947                         foreach( $this->mParserOutput->getTemplates() as $ns => $template) {
1948                                 foreach( array_keys( $template ) as $dbk ) {
1949                                         $templates[] = Title::makeTitle($ns, $dbk);
1950                                 }
1951                         }
1952                         return $templates;
1953                 } else {
1954                         return $this->mArticle->getUsedTemplates();
1955                 }
1956         }
1957
1958         /**
1959          * Call the stock "user is blocked" page
1960          */
1961         function blockedPage() {
1962                 global $wgOut;
1963                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
1964
1965                 # If the user made changes, preserve them when showing the markup
1966                 # (This happens when a user is blocked during edit, for instance)
1967                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
1968                 if ( $first ) {
1969                         $source = $this->mTitle->exists() ? $this->getContent() : false;
1970                 } else {
1971                         $source = $this->textbox1;
1972                 }
1973
1974                 # Spit out the source or the user's modified version
1975                 if ( $source !== false ) {
1976                         $wgOut->addHTML( '<hr />' );
1977                         $wgOut->addWikiMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() );
1978                         $this->showTextbox1( array( 'readonly' ), $source );
1979                 }
1980         }
1981
1982         /**
1983          * Produce the stock "please login to edit pages" page
1984          */
1985         function userNotLoggedInPage() {
1986                 global $wgUser, $wgOut, $wgTitle;
1987                 $skin = $wgUser->getSkin();
1988
1989                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1990                 $loginLink = $skin->link(
1991                         $loginTitle,
1992                         wfMsgHtml( 'loginreqlink' ),
1993                         array(),
1994                         array( 'returnto' => $wgTitle->getPrefixedText() ),
1995                         array( 'known', 'noclasses' )
1996                 );
1997
1998                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1999                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2000                 $wgOut->setArticleRelated( false );
2001
2002                 $wgOut->addHTML( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
2003                 $wgOut->returnToMain( false, $wgTitle );
2004         }
2005
2006         /**
2007          * Creates a basic error page which informs the user that
2008          * they have attempted to edit a nonexistent section.
2009          */
2010         function noSuchSectionPage() {
2011                 global $wgOut;
2012
2013                 $wgOut->setPageTitle( wfMsg( 'nosuchsectiontitle' ) );
2014                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2015                 $wgOut->setArticleRelated( false );
2016
2017                 $res = wfMsgExt( 'nosuchsectiontext', 'parse', $this->section );
2018                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
2019                 $wgOut->addHTML( $res );
2020
2021                 $wgOut->returnToMain( false, $this->mTitle );
2022         }
2023
2024         /**
2025          * Produce the stock "your edit contains spam" page
2026          *
2027          * @param $match Text which triggered one or more filters
2028          */
2029         static function spamPage( $match = false ) {
2030                 global $wgOut, $wgTitle;
2031
2032                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
2033                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2034                 $wgOut->setArticleRelated( false );
2035
2036                 $wgOut->addHTML( '<div id="spamprotected">' );
2037                 $wgOut->addWikiMsg( 'spamprotectiontext' );
2038                 if ( $match ) {
2039                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
2040                 }
2041                 $wgOut->addHTML( '</div>' );
2042
2043                 $wgOut->returnToMain( false, $wgTitle );
2044         }
2045
2046         /**
2047          * @private
2048          * @todo document
2049          */
2050         function mergeChangesInto( &$editText ){
2051                 wfProfileIn( __METHOD__ );
2052
2053                 $db = wfGetDB( DB_MASTER );
2054
2055                 // This is the revision the editor started from
2056                 $baseRevision = $this->getBaseRevision();
2057                 if ( is_null( $baseRevision ) ) {
2058                         wfProfileOut( __METHOD__ );
2059                         return false;
2060                 }
2061                 $baseText = $baseRevision->getText();
2062
2063                 // The current state, we want to merge updates into it
2064                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2065                 if ( is_null( $currentRevision ) ) {
2066                         wfProfileOut( __METHOD__ );
2067                         return false;
2068                 }
2069                 $currentText = $currentRevision->getText();
2070
2071                 $result = '';
2072                 if ( wfMerge( $baseText, $editText, $currentText, $result ) ) {
2073                         $editText = $result;
2074                         wfProfileOut( __METHOD__ );
2075                         return true;
2076                 } else {
2077                         wfProfileOut( __METHOD__ );
2078                         return false;
2079                 }
2080         }
2081
2082         /**
2083          * Check if the browser is on a blacklist of user-agents known to
2084          * mangle UTF-8 data on form submission. Returns true if Unicode
2085          * should make it through, false if it's known to be a problem.
2086          * @return bool
2087          * @private
2088          */
2089         function checkUnicodeCompliantBrowser() {
2090                 global $wgBrowserBlackList;
2091                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
2092                         // No User-Agent header sent? Trust it by default...
2093                         return true;
2094                 }
2095                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
2096                 foreach ( $wgBrowserBlackList as $browser ) {
2097                         if ( preg_match($browser, $currentbrowser) ) {
2098                                 return false;
2099                         }
2100                 }
2101                 return true;
2102         }
2103
2104         /**
2105          * @deprecated use $wgParser->stripSectionName()
2106          */
2107         function pseudoParseSectionAnchor( $text ) {
2108                 global $wgParser;
2109                 return $wgParser->stripSectionName( $text );
2110         }
2111
2112         /**
2113          * Format an anchor fragment as it would appear for a given section name
2114          * @param $text String
2115          * @return String
2116          * @private
2117          */
2118         function sectionAnchor( $text ) {
2119                 global $wgParser;
2120                 return $wgParser->guessSectionNameFromWikiText( $text );
2121         }
2122
2123         /**
2124          * Shows a bulletin board style toolbar for common editing functions.
2125          * It can be disabled in the user preferences.
2126          * The necessary JavaScript code can be found in skins/common/edit.js.
2127          *
2128          * @return string
2129          */
2130         static function getEditToolbar() {
2131                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
2132                 global $wgUseTeX, $wgEnableUploads, $wgForeignFileRepos;
2133
2134                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
2135
2136                 /**
2137
2138                  * toolarray an array of arrays which each include the filename of
2139                  * the button image (without path), the opening tag, the closing tag,
2140                  * and optionally a sample text that is inserted between the two when no
2141                  * selection is highlighted.
2142                  * The tip text is shown when the user moves the mouse over the button.
2143                  *
2144                  * Already here are accesskeys (key), which are not used yet until someone
2145                  * can figure out a way to make them work in IE. However, we should make
2146                  * sure these keys are not defined on the edit page.
2147                  */
2148                 $toolarray = array(
2149                         array(
2150                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
2151                                 'id'     => 'mw-editbutton-bold',
2152                                 'open'   => '\'\'\'',
2153                                 'close'  => '\'\'\'',
2154                                 'sample' => wfMsg( 'bold_sample' ),
2155                                 'tip'    => wfMsg( 'bold_tip' ),
2156                                 'key'    => 'B'
2157                         ),
2158                         array(
2159                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
2160                                 'id'     => 'mw-editbutton-italic',
2161                                 'open'   => '\'\'',
2162                                 'close'  => '\'\'',
2163                                 'sample' => wfMsg( 'italic_sample' ),
2164                                 'tip'    => wfMsg( 'italic_tip' ),
2165                                 'key'    => 'I'
2166                         ),
2167                         array(
2168                                 'image'  => $wgLang->getImageFile( 'button-link' ),
2169                                 'id'     => 'mw-editbutton-link',
2170                                 'open'   => '[[',
2171                                 'close'  => ']]',
2172                                 'sample' => wfMsg( 'link_sample' ),
2173                                 'tip'    => wfMsg( 'link_tip' ),
2174                                 'key'    => 'L'
2175                         ),
2176                         array(
2177                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
2178                                 'id'     => 'mw-editbutton-extlink',
2179                                 'open'   => '[',
2180                                 'close'  => ']',
2181                                 'sample' => wfMsg( 'extlink_sample' ),
2182                                 'tip'    => wfMsg( 'extlink_tip' ),
2183                                 'key'    => 'X'
2184                         ),
2185                         array(
2186                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
2187                                 'id'     => 'mw-editbutton-headline',
2188                                 'open'   => "\n== ",
2189                                 'close'  => " ==\n",
2190                                 'sample' => wfMsg( 'headline_sample' ),
2191                                 'tip'    => wfMsg( 'headline_tip' ),
2192                                 'key'    => 'H'
2193                         ),
2194                         $imagesAvailable ? array(
2195                                 'image'  => $wgLang->getImageFile( 'button-image' ),
2196                                 'id'     => 'mw-editbutton-image',
2197                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
2198                                 'close'  => ']]',
2199                                 'sample' => wfMsg( 'image_sample' ),
2200                                 'tip'    => wfMsg( 'image_tip' ),
2201                                 'key'    => 'D'
2202                         ) : false,
2203                         $imagesAvailable ? array(
2204                                 'image'  => $wgLang->getImageFile( 'button-media' ),
2205                                 'id'     => 'mw-editbutton-media',
2206                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
2207                                 'close'  => ']]',
2208                                 'sample' => wfMsg( 'media_sample' ),
2209                                 'tip'    => wfMsg( 'media_tip' ),
2210                                 'key'    => 'M'
2211                         ) : false,
2212                         $wgUseTeX ?     array(
2213                                 'image'  => $wgLang->getImageFile( 'button-math' ),
2214                                 'id'     => 'mw-editbutton-math',
2215                                 'open'   => "<math>",
2216                                 'close'  => "</math>",
2217                                 'sample' => wfMsg( 'math_sample' ),
2218                                 'tip'    => wfMsg( 'math_tip' ),
2219                                 'key'    => 'C'
2220                         ) : false,
2221                         array(
2222                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
2223                                 'id'     => 'mw-editbutton-nowiki',
2224                                 'open'   => "<nowiki>",
2225                                 'close'  => "</nowiki>",
2226                                 'sample' => wfMsg( 'nowiki_sample' ),
2227                                 'tip'    => wfMsg( 'nowiki_tip' ),
2228                                 'key'    => 'N'
2229                         ),
2230                         array(
2231                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
2232                                 'id'     => 'mw-editbutton-signature',
2233                                 'open'   => '--~~~~',
2234                                 'close'  => '',
2235                                 'sample' => '',
2236                                 'tip'    => wfMsg( 'sig_tip' ),
2237                                 'key'    => 'Y'
2238                         ),
2239                         array(
2240                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
2241                                 'id'     => 'mw-editbutton-hr',
2242                                 'open'   => "\n----\n",
2243                                 'close'  => '',
2244                                 'sample' => '',
2245                                 'tip'    => wfMsg( 'hr_tip' ),
2246                                 'key'    => 'R'
2247                         )
2248                 );
2249                 $toolbar = "<div id='toolbar'>\n";
2250
2251                 $script = '';
2252                 foreach ( $toolarray as $tool ) {
2253                         if ( !$tool ) {
2254                                 continue;
2255                         }
2256
2257                         $params = array(
2258                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
2259                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
2260                                 // Older browsers show a "speedtip" type message only for ALT.
2261                                 // Ideally these should be different, realistically they
2262                                 // probably don't need to be.
2263                                 $tip = $tool['tip'],
2264                                 $open = $tool['open'],
2265                                 $close = $tool['close'],
2266                                 $sample = $tool['sample'],
2267                                 $cssId = $tool['id'],
2268                         );
2269
2270                         $paramList = implode( ',',
2271                                 array_map( array( 'Xml', 'encodeJsVar' ), $params ) );
2272                         $script .= "addButton($paramList);\n";
2273                 }
2274
2275                 $wgOut->addScript( Html::inlineScript(
2276                         "if ( window.mediaWiki ) { $script }"
2277                 ) );
2278
2279                 $toolbar .= "\n</div>";
2280
2281                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
2282
2283                 return $toolbar;
2284         }
2285
2286         /**
2287          * Returns an array of html code of the following checkboxes:
2288          * minor and watch
2289          *
2290          * @param $tabindex Current tabindex
2291          * @param $skin Skin object
2292          * @param $checked Array of checkbox => bool, where bool indicates the checked
2293          *                 status of the checkbox
2294          *
2295          * @return array
2296          */
2297         public function getCheckboxes( &$tabindex, $skin, $checked ) {
2298                 global $wgUser;
2299
2300                 $checkboxes = array();
2301
2302                 $checkboxes['minor'] = '';
2303                 $minorLabel = wfMsgExt( 'minoredit', array( 'parseinline' ) );
2304                 if ( $wgUser->isAllowed( 'minoredit' ) ) {
2305                         $attribs = array(
2306                                 'tabindex'  => ++$tabindex,
2307                                 'accesskey' => wfMsg( 'accesskey-minoredit' ),
2308                                 'id'        => 'wpMinoredit',
2309                         );
2310                         $checkboxes['minor'] =
2311                                 Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
2312                                 "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" . $skin->titleAttrib( 'minoredit', 'withaccess' ) . ">{$minorLabel}</label>";
2313                 }
2314
2315                 $watchLabel = wfMsgExt( 'watchthis', array( 'parseinline' ) );
2316                 $checkboxes['watch'] = '';
2317                 if ( $wgUser->isLoggedIn() ) {
2318                         $attribs = array(
2319                                 'tabindex'  => ++$tabindex,
2320                                 'accesskey' => wfMsg( 'accesskey-watch' ),
2321                                 'id'        => 'wpWatchthis',
2322                         );
2323                         $checkboxes['watch'] =
2324                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
2325                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" . $skin->titleAttrib( 'watch', 'withaccess' ) . ">{$watchLabel}</label>";
2326                 }
2327                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
2328                 return $checkboxes;
2329         }
2330
2331         /**
2332          * Returns an array of html code of the following buttons:
2333          * save, diff, preview and live
2334          *
2335          * @param $tabindex Current tabindex
2336          *
2337          * @return array
2338          */
2339         public function getEditButtons( &$tabindex ) {
2340                 $buttons = array();
2341
2342                 $temp = array(
2343                         'id'        => 'wpSave',
2344                         'name'      => 'wpSave',
2345                         'type'      => 'submit',
2346                         'tabindex'  => ++$tabindex,
2347                         'value'     => wfMsg( 'savearticle' ),
2348                         'accesskey' => wfMsg( 'accesskey-save' ),
2349                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
2350                 );
2351                 $buttons['save'] = Xml::element('input', $temp, '');
2352
2353                 ++$tabindex; // use the same for preview and live preview
2354                 $temp = array(
2355                         'id'        => 'wpPreview',
2356                         'name'      => 'wpPreview',
2357                         'type'      => 'submit',
2358                         'tabindex'  => $tabindex,
2359                         'value'     => wfMsg( 'showpreview' ),
2360                         'accesskey' => wfMsg( 'accesskey-preview' ),
2361                         'title'     => wfMsg( 'tooltip-preview' ) . ' [' . wfMsg( 'accesskey-preview' ) . ']',
2362                 );
2363                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
2364                 $buttons['live'] = '';
2365
2366                 $temp = array(
2367                         'id'        => 'wpDiff',
2368                         'name'      => 'wpDiff',
2369                         'type'      => 'submit',
2370                         'tabindex'  => ++$tabindex,
2371                         'value'     => wfMsg( 'showdiff' ),
2372                         'accesskey' => wfMsg( 'accesskey-diff' ),
2373                         'title'     => wfMsg( 'tooltip-diff' ) . ' [' . wfMsg( 'accesskey-diff' ) . ']',
2374                 );
2375                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
2376
2377                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
2378                 return $buttons;
2379         }
2380
2381         /**
2382          * Output preview text only. This can be sucked into the edit page
2383          * via JavaScript, and saves the server time rendering the skin as
2384          * well as theoretically being more robust on the client (doesn't
2385          * disturb the edit box's undo history, won't eat your text on
2386          * failure, etc).
2387          *
2388          * @todo This doesn't include category or interlanguage links.
2389          *       Would need to enhance it a bit, <s>maybe wrap them in XML
2390          *       or something...</s> that might also require more skin
2391          *       initialization, so check whether that's a problem.
2392          */
2393         function livePreview() {
2394                 global $wgOut;
2395                 $wgOut->disable();
2396                 header( 'Content-type: text/xml; charset=utf-8' );
2397                 header( 'Cache-control: no-cache' );
2398
2399                 $previewText = $this->getPreviewText();
2400                 #$categories = $skin->getCategoryLinks();
2401
2402                 $s =
2403                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
2404                 Xml::tags( 'livepreview', null,
2405                         Xml::element( 'preview', null, $previewText )
2406                         #.      Xml::element( 'category', null, $categories )
2407                 );
2408                 echo $s;
2409         }
2410
2411
2412         public function getCancelLink() {
2413                 global $wgUser, $wgTitle;
2414
2415                 $cancelParams = array();
2416                 if ( !$this->isConflict && $this->mArticle->getOldID() > 0 ) {
2417                         $cancelParams['oldid'] = $this->mArticle->getOldID();
2418                 }
2419
2420                 return $wgUser->getSkin()->link(
2421                         $wgTitle,
2422                         wfMsgExt( 'cancel', array( 'parseinline' ) ),
2423                         array( 'id' => 'mw-editform-cancel' ),
2424                         $cancelParams,
2425                         array( 'known', 'noclasses' )
2426                 );
2427         }
2428
2429         /**
2430          * Get a diff between the current contents of the edit box and the
2431          * version of the page we're editing from.
2432          *
2433          * If this is a section edit, we'll replace the section as for final
2434          * save and then make a comparison.
2435          */
2436         function showDiff() {
2437                 $oldtext = $this->mArticle->fetchContent();
2438                 $newtext = $this->mArticle->replaceSection(
2439                         $this->section, $this->textbox1, $this->summary, $this->edittime );
2440
2441                 wfRunHooks( 'EditPageGetDiffText', array( $this, &$newtext ) );
2442
2443                 $newtext = $this->mArticle->preSaveTransform( $newtext );
2444                 $oldtitle = wfMsgExt( 'currentrev', array( 'parseinline' ) );
2445                 $newtitle = wfMsgExt( 'yourtext', array( 'parseinline' ) );
2446                 if ( $oldtext !== false  || $newtext != '' ) {
2447                         $de = new DifferenceEngine( $this->mTitle );
2448                         $de->setText( $oldtext, $newtext );
2449                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2450                         $de->showDiffStyle();
2451                 } else {
2452                         $difftext = '';
2453                 }
2454
2455                 global $wgOut;
2456                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2457         }
2458
2459         /**
2460          * Filter an input field through a Unicode de-armoring process if it
2461          * came from an old browser with known broken Unicode editing issues.
2462          *
2463          * @param $request WebRequest
2464          * @param $field String
2465          * @return String
2466          * @private
2467          */
2468         function safeUnicodeInput( $request, $field ) {
2469                 $text = rtrim( $request->getText( $field ) );
2470                 return $request->getBool( 'safemode' )
2471                         ? $this->unmakesafe( $text )
2472                         : $text;
2473         }
2474
2475         function safeUnicodeText( $request, $text ) {
2476                 $text = rtrim( $text );
2477                 return $request->getBool( 'safemode' )
2478                         ? $this->unmakesafe( $text )
2479                         : $text;
2480         }
2481
2482         /**
2483          * Filter an output field through a Unicode armoring process if it is
2484          * going to an old browser with known broken Unicode editing issues.
2485          *
2486          * @param $text String
2487          * @return String
2488          * @private
2489          */
2490         function safeUnicodeOutput( $text ) {
2491                 global $wgContLang;
2492                 $codedText = $wgContLang->recodeForEdit( $text );
2493                 return $this->checkUnicodeCompliantBrowser()
2494                         ? $codedText
2495                         : $this->makesafe( $codedText );
2496         }
2497
2498         /**
2499          * A number of web browsers are known to corrupt non-ASCII characters
2500          * in a UTF-8 text editing environment. To protect against this,
2501          * detected browsers will be served an armored version of the text,
2502          * with non-ASCII chars converted to numeric HTML character references.
2503          *
2504          * Preexisting such character references will have a 0 added to them
2505          * to ensure that round-trips do not alter the original data.
2506          *
2507          * @param $invalue String
2508          * @return String
2509          * @private
2510          */
2511         function makesafe( $invalue ) {
2512                 // Armor existing references for reversability.
2513                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
2514
2515                 $bytesleft = 0;
2516                 $result = "";
2517                 $working = 0;
2518                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2519                         $bytevalue = ord( $invalue{$i} );
2520                         if ( $bytevalue <= 0x7F ) { //0xxx xxxx
2521                                 $result .= chr( $bytevalue );
2522                                 $bytesleft = 0;
2523                         } elseif ( $bytevalue <= 0xBF ) { //10xx xxxx
2524                                 $working = $working << 6;
2525                                 $working += ($bytevalue & 0x3F);
2526                                 $bytesleft--;
2527                                 if ( $bytesleft <= 0 ) {
2528                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
2529                                 }
2530                         } elseif ( $bytevalue <= 0xDF ) { //110x xxxx
2531                                 $working = $bytevalue & 0x1F;
2532                                 $bytesleft = 1;
2533                         } elseif ( $bytevalue <= 0xEF ) { //1110 xxxx
2534                                 $working = $bytevalue & 0x0F;
2535                                 $bytesleft = 2;
2536                         } else { //1111 0xxx
2537                                 $working = $bytevalue & 0x07;
2538                                 $bytesleft = 3;
2539                         }
2540                 }
2541                 return $result;
2542         }
2543
2544         /**
2545          * Reverse the previously applied transliteration of non-ASCII characters
2546          * back to UTF-8. Used to protect data from corruption by broken web browsers
2547          * as listed in $wgBrowserBlackList.
2548          *
2549          * @param $invalue String
2550          * @return String
2551          * @private
2552          */
2553         function unmakesafe( $invalue ) {
2554                 $result = "";
2555                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2556                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
2557                                 $i += 3;
2558                                 $hexstring = "";
2559                                 do {
2560                                         $hexstring .= $invalue{$i};
2561                                         $i++;
2562                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
2563
2564                                 // Do some sanity checks. These aren't needed for reversability,
2565                                 // but should help keep the breakage down if the editor
2566                                 // breaks one of the entities whilst editing.
2567                                 if ( (substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6) ) {
2568                                         $codepoint = hexdec($hexstring);
2569                                         $result .= codepointToUtf8( $codepoint );
2570                                 } else {
2571                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
2572                                 }
2573                         } else {
2574                                 $result .= substr( $invalue, $i, 1 );
2575                         }
2576                 }
2577                 // reverse the transform that we made for reversability reasons.
2578                 return strtr( $result, array( "&#x0" => "&#x" ) );
2579         }
2580
2581         function noCreatePermission() {
2582                 global $wgOut;
2583                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
2584                 $wgOut->addWikiMsg( 'nocreatetext' );
2585         }
2586
2587         /**
2588          * Attempt submission
2589          * @return bool false if output is done, true if the rest of the form should be displayed
2590          */
2591         function attemptSave() {
2592                 global $wgUser, $wgOut, $wgTitle;
2593
2594                 $resultDetails = false;
2595                 # Allow bots to exempt some edits from bot flagging
2596                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
2597                 $value = $this->internalAttemptSave( $resultDetails, $bot );
2598
2599                 if ( $value == self::AS_SUCCESS_UPDATE || $value == self::AS_SUCCESS_NEW_ARTICLE ) {
2600                         $this->didSave = true;
2601                 }
2602
2603                 switch ( $value ) {
2604                         case self::AS_HOOK_ERROR_EXPECTED:
2605                         case self::AS_CONTENT_TOO_BIG:
2606                         case self::AS_ARTICLE_WAS_DELETED:
2607                         case self::AS_CONFLICT_DETECTED:
2608                         case self::AS_SUMMARY_NEEDED:
2609                         case self::AS_TEXTBOX_EMPTY:
2610                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
2611                         case self::AS_END:
2612                                 return true;
2613
2614                         case self::AS_HOOK_ERROR:
2615                         case self::AS_FILTERING:
2616                         case self::AS_SUCCESS_NEW_ARTICLE:
2617                         case self::AS_SUCCESS_UPDATE:
2618                                 return false;
2619
2620                         case self::AS_SPAM_ERROR:
2621                                 self::spamPage( $resultDetails['spam'] );
2622                                 return false;
2623
2624                         case self::AS_BLOCKED_PAGE_FOR_USER:
2625                                 $this->blockedPage();
2626                                 return false;
2627
2628                         case self::AS_IMAGE_REDIRECT_ANON:
2629                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
2630                                 return false;
2631
2632                         case self::AS_READ_ONLY_PAGE_ANON:
2633                                 $this->userNotLoggedInPage();
2634                                 return false;
2635
2636                         case self::AS_READ_ONLY_PAGE_LOGGED:
2637                         case self::AS_READ_ONLY_PAGE:
2638                                 $wgOut->readOnlyPage();
2639                                 return false;
2640
2641                         case self::AS_RATE_LIMITED:
2642                                 $wgOut->rateLimited();
2643                                 return false;
2644
2645                         case self::AS_NO_CREATE_PERMISSION:
2646                                 $this->noCreatePermission();
2647                                 return;
2648
2649                         case self::AS_BLANK_ARTICLE:
2650                                 $wgOut->redirect( $wgTitle->getFullURL() );
2651                                 return false;
2652
2653                         case self::AS_IMAGE_REDIRECT_LOGGED:
2654                                 $wgOut->permissionRequired( 'upload' );
2655                                 return false;
2656                 }
2657         }
2658
2659         function getBaseRevision() {
2660                 if ( !$this->mBaseRevision ) {
2661                         $db = wfGetDB( DB_MASTER );
2662                         $baseRevision = Revision::loadFromTimestamp(
2663                                 $db, $this->mTitle, $this->edittime );
2664                         return $this->mBaseRevision = $baseRevision;
2665                 } else {
2666                         return $this->mBaseRevision;
2667                 }
2668         }
2669 }