includes/EditPage.php

   1 <?php
   2 /**
   3  * Page edition user interface.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * The edit page/HTML interface (split from Article)
  25  * The actual database and text munging is still in Article,
  26  * but it should get easier to call those from alternate
  27  * interfaces.
  28  *
  29  * EditPage cares about two distinct titles:
  30  * $this->mContextTitle is the page that forms submit to, links point to,
  31  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  32  * page in the database that is actually being edited. These are
  33  * usually the same, but they are now allowed to be different.
  34  *
  35  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  36  * headaches, which may be fatal.
  37  */
  38 class EditPage {
  39
  40         /**
  41          * Status: Article successfully updated
  42          */
  43         const AS_SUCCESS_UPDATE            = 200;
  44
  45         /**
  46          * Status: Article successfully created
  47          */
  48         const AS_SUCCESS_NEW_ARTICLE       = 201;
  49
  50         /**
  51          * Status: Article update aborted by a hook function
  52          */
  53         const AS_HOOK_ERROR                = 210;
  54
  55         /**
  56          * Status: A hook function returned an error
  57          */
  58         const AS_HOOK_ERROR_EXPECTED       = 212;
  59
  60         /**
  61          * Status: User is blocked from editting this page
  62          */
  63         const AS_BLOCKED_PAGE_FOR_USER     = 215;
  64
  65         /**
  66          * Status: Content too big (> $wgMaxArticleSize)
  67          */
  68         const AS_CONTENT_TOO_BIG           = 216;
  69
  70         /**
  71          * Status: User cannot edit? (not used)
  72          */
  73         const AS_USER_CANNOT_EDIT          = 217;
  74
  75         /**
  76          * Status: this anonymous user is not allowed to edit this page
  77          */
  78         const AS_READ_ONLY_PAGE_ANON       = 218;
  79
  80         /**
  81          * Status: this logged in user is not allowed to edit this page
  82          */
  83         const AS_READ_ONLY_PAGE_LOGGED     = 219;
  84
  85         /**
  86          * Status: wiki is in readonly mode (wfReadOnly() == true)
  87          */
  88         const AS_READ_ONLY_PAGE            = 220;
  89
  90         /**
  91          * Status: rate limiter for action 'edit' was tripped
  92          */
  93         const AS_RATE_LIMITED              = 221;
  94
  95         /**
  96          * Status: article was deleted while editting and param wpRecreate == false or form
  97          * was not posted
  98          */
  99         const AS_ARTICLE_WAS_DELETED       = 222;
 100
 101         /**
 102          * Status: user tried to create this page, but is not allowed to do that
 103          * ( Title->usercan('create') == false )
 104          */
 105         const AS_NO_CREATE_PERMISSION      = 223;
 106
 107         /**
 108          * Status: user tried to create a blank page
 109          */
 110         const AS_BLANK_ARTICLE             = 224;
 111
 112         /**
 113          * Status: (non-resolvable) edit conflict
 114          */
 115         const AS_CONFLICT_DETECTED         = 225;
 116
 117         /**
 118          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 119          * editting in his own userspace or talkspace and wpIgnoreBlankSummary == false
 120          */
 121         const AS_SUMMARY_NEEDED            = 226;
 122
 123         /**
 124          * Status: user tried to create a new section without content
 125          */
 126         const AS_TEXTBOX_EMPTY             = 228;
 127
 128         /**
 129          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 130          */
 131         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 132
 133         /**
 134          * not used
 135          */
 136         const AS_OK                        = 230;
 137
 138         /**
 139          * Status: WikiPage::doEdit() was unsuccessfull
 140          */
 141         const AS_END                       = 231;
 142
 143         /**
 144          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 145          */
 146         const AS_SPAM_ERROR                = 232;
 147
 148         /**
 149          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 150          */
 151         const AS_IMAGE_REDIRECT_ANON       = 233;
 152
 153         /**
 154          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 155          */
 156         const AS_IMAGE_REDIRECT_LOGGED     = 234;
 157
 158         /**
 159          * Status: can't parse content
 160          */
 161         const AS_PARSE_ERROR                = 240;
 162
 163         /**
 164          * HTML id and name for the beginning of the edit form.
 165          */
 166         const EDITFORM_ID                  = 'editform';
 167
 168         /**
 169          * @var Article
 170          */
 171         var $mArticle;
 172
 173         /**
 174          * @var Title
 175          */
 176         var $mTitle;
 177         private $mContextTitle = null;
 178         var $action = 'submit';
 179         var $isConflict = false;
 180         var $isCssJsSubpage = false;
 181         var $isCssSubpage = false;
 182         var $isJsSubpage = false;
 183         var $isWrongCaseCssJsPage = false;
 184         var $isNew = false; // new page or new section
 185         var $deletedSinceEdit;
 186         var $formtype;
 187         var $firsttime;
 188         var $lastDelete;
 189         var $mTokenOk = false;
 190         var $mTokenOkExceptSuffix = false;
 191         var $mTriedSave = false;
 192         var $incompleteForm = false;
 193         var $tooBig = false;
 194         var $kblength = false;
 195         var $missingComment = false;
 196         var $missingSummary = false;
 197         var $allowBlankSummary = false;
 198         var $autoSumm = '';
 199         var $hookError = '';
 200         #var $mPreviewTemplates;
 201
 202         /**
 203          * @var ParserOutput
 204          */
 205         var $mParserOutput;
 206
 207         /**
 208          * Has a summary been preset using GET parameter &summary= ?
 209          * @var Bool
 210          */
 211         var $hasPresetSummary = false;
 212
 213         var $mBaseRevision = false;
 214         var $mShowSummaryField = true;
 215
 216         # Form values
 217         var $save = false, $preview = false, $diff = false;
 218         var $minoredit = false, $watchthis = false, $recreate = false;
 219         var $textbox1 = '', $textbox2 = '', $summary = '', $nosummary = false;
 220         var $edittime = '', $section = '', $sectiontitle = '', $starttime = '';
 221         var $oldid = 0, $editintro = '', $scrolltop = null, $bot = true;
 222         var $contentModel = null, $contentFormat = null;
 223
 224         # Placeholders for text injection by hooks (must be HTML)
 225         # extensions should take care to _append_ to the present value
 226         public $editFormPageTop = ''; // Before even the preview
 227         public $editFormTextTop = '';
 228         public $editFormTextBeforeContent = '';
 229         public $editFormTextAfterWarn = '';
 230         public $editFormTextAfterTools = '';
 231         public $editFormTextBottom = '';
 232         public $editFormTextAfterContent = '';
 233         public $previewTextAfterContent = '';
 234         public $mPreloadContent = null;
 235
 236         /* $didSave should be set to true whenever an article was succesfully altered. */
 237         public $didSave = false;
 238         public $undidRev = 0;
 239
 240         public $suppressIntro = false;
 241
 242         /**
 243          * Set to true to allow editing of non-text content types.
 244          *
 245          * @var bool
 246          */
 247         public $allowNonTextContent = false;
 248
 249         /**
 250          * @param $article Article
 251          */
 252         public function __construct( Article $article ) {
 253                 $this->mArticle = $article;
 254                 $this->mTitle = $article->getTitle();
 255
 256                 $this->contentModel = $this->mTitle->getContentModel();
 257
 258                 $handler = ContentHandler::getForModelID( $this->contentModel );
 259                 $this->contentFormat = $handler->getDefaultFormat();
 260         }
 261
 262         /**
 263          * @return Article
 264          */
 265         public function getArticle() {
 266                 return $this->mArticle;
 267         }
 268
 269         /**
 270          * @since 1.19
 271          * @return Title
 272          */
 273         public function getTitle() {
 274                 return $this->mTitle;
 275         }
 276
 277         /**
 278          * Set the context Title object
 279          *
 280          * @param $title Title object or null
 281          */
 282         public function setContextTitle( $title ) {
 283                 $this->mContextTitle = $title;
 284         }
 285
 286         /**
 287          * Get the context title object.
 288          * If not set, $wgTitle will be returned. This behavior might change in
 289          * the future to return $this->mTitle instead.
 290          *
 291          * @return Title object
 292          */
 293         public function getContextTitle() {
 294                 if ( is_null( $this->mContextTitle ) ) {
 295                         global $wgTitle;
 296                         return $wgTitle;
 297                 } else {
 298                         return $this->mContextTitle;
 299                 }
 300         }
 301
 302         function submit() {
 303                 $this->edit();
 304         }
 305
 306         /**
 307          * This is the function that gets called for "action=edit". It
 308          * sets up various member variables, then passes execution to
 309          * another function, usually showEditForm()
 310          *
 311          * The edit form is self-submitting, so that when things like
 312          * preview and edit conflicts occur, we get the same form back
 313          * with the extra stuff added.  Only when the final submission
 314          * is made and all is well do we actually save and redirect to
 315          * the newly-edited page.
 316          */
 317         function edit() {
 318                 global $wgOut, $wgRequest, $wgUser;
 319                 // Allow extensions to modify/prevent this form or submission
 320                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 321                         return;
 322                 }
 323
 324                 wfProfileIn( __METHOD__ );
 325                 wfDebug( __METHOD__ . ": enter\n" );
 326
 327                 // If they used redlink=1 and the page exists, redirect to the main article
 328                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 329                         $wgOut->redirect( $this->mTitle->getFullURL() );
 330                         wfProfileOut( __METHOD__ );
 331                         return;
 332                 }
 333
 334                 $this->importFormData( $wgRequest );
 335                 $this->firsttime = false;
 336
 337                 if ( $this->live ) {
 338                         $this->livePreview();
 339                         wfProfileOut( __METHOD__ );
 340                         return;
 341                 }
 342
 343                 if ( wfReadOnly() && $this->save ) {
 344                         // Force preview
 345                         $this->save = false;
 346                         $this->preview = true;
 347                 }
 348
 349                 if ( $this->save ) {
 350                         $this->formtype = 'save';
 351                 } elseif ( $this->preview ) {
 352                         $this->formtype = 'preview';
 353                 } elseif ( $this->diff ) {
 354                         $this->formtype = 'diff';
 355                 } else { # First time through
 356                         $this->firsttime = true;
 357                         if ( $this->previewOnOpen() ) {
 358                                 $this->formtype = 'preview';
 359                         } else {
 360                                 $this->formtype = 'initial';
 361                         }
 362                 }
 363
 364                 $permErrors = $this->getEditPermissionErrors();
 365                 if ( $permErrors ) {
 366                         wfDebug( __METHOD__ . ": User can't edit\n" );
 367                         // Auto-block user's IP if the account was "hard" blocked
 368                         $wgUser->spreadAnyEditBlock();
 369
 370                         $this->displayPermissionsError( $permErrors );
 371
 372                         wfProfileOut( __METHOD__ );
 373                         return;
 374                 }
 375
 376                 wfProfileIn( __METHOD__ . "-business-end" );
 377
 378                 $this->isConflict = false;
 379                 // css / js subpages of user pages get a special treatment
 380                 $this->isCssJsSubpage       = $this->mTitle->isCssJsSubpage();
 381                 $this->isCssSubpage         = $this->mTitle->isCssSubpage();
 382                 $this->isJsSubpage          = $this->mTitle->isJsSubpage();
 383                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 384
 385                 # Show applicable editing introductions
 386                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 387                         $this->showIntro();
 388                 }
 389
 390                 # Attempt submission here.  This will check for edit conflicts,
 391                 # and redundantly check for locked database, blocked IPs, etc.
 392                 # that edit() already checked just in case someone tries to sneak
 393                 # in the back door with a hand-edited submission URL.
 394
 395                 if ( 'save' == $this->formtype ) {
 396                         if ( !$this->attemptSave() ) {
 397                                 wfProfileOut( __METHOD__ . "-business-end" );
 398                                 wfProfileOut( __METHOD__ );
 399                                 return;
 400                         }
 401                 }
 402
 403                 # First time through: get contents, set time for conflict
 404                 # checking, etc.
 405                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 406                         if ( $this->initialiseForm() === false ) {
 407                                 $this->noSuchSectionPage();
 408                                 wfProfileOut( __METHOD__ . "-business-end" );
 409                                 wfProfileOut( __METHOD__ );
 410                                 return;
 411                         }
 412
 413                         if ( !$this->mTitle->getArticleID() ) {
 414                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 415                         } else {
 416                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 417                         }
 418
 419                 }
 420
 421                 $this->showEditForm();
 422                 wfProfileOut( __METHOD__ . "-business-end" );
 423                 wfProfileOut( __METHOD__ );
 424         }
 425
 426         /**
 427          * @return array
 428          */
 429         protected function getEditPermissionErrors() {
 430                 global $wgUser;
 431                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 432                 # Can this title be created?
 433                 if ( !$this->mTitle->exists() ) {
 434                         $permErrors = array_merge( $permErrors,
 435                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 436                 }
 437                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 438                 $remove = array();
 439                 foreach ( $permErrors as $error ) {
 440                         if ( ( $this->preview || $this->diff ) &&
 441                                 ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' ) )
 442                         {
 443                                 $remove[] = $error;
 444                         }
 445                 }
 446                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 447                 return $permErrors;
 448         }
 449
 450         /**
 451          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 452          * but with the following differences:
 453          * - If redlink=1, the user will be redirected to the page
 454          * - If there is content to display or the error occurs while either saving,
 455          *   previewing or showing the difference, it will be a
 456          *   "View source for ..." page displaying the source code after the error message.
 457          *
 458          * @since 1.19
 459          * @param $permErrors Array of permissions errors, as returned by
 460          *                    Title::getUserPermissionsErrors().
 461          * @throws PermissionsError
 462          */
 463         protected function displayPermissionsError( array $permErrors ) {
 464                 global $wgRequest, $wgOut;
 465
 466                 if ( $wgRequest->getBool( 'redlink' ) ) {
 467                         // The edit page was reached via a red link.
 468                         // Redirect to the article page and let them click the edit tab if
 469                         // they really want a permission error.
 470                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 471                         return;
 472                 }
 473
 474                 $content = $this->getContentObject();
 475
 476                 # Use the normal message if there's nothing to display
 477                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 478                         $action = $this->mTitle->exists() ? 'edit' :
 479                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 480                         throw new PermissionsError( $action, $permErrors );
 481                 }
 482
 483                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 484                 $wgOut->setPageTitle( wfMessage( 'viewsource-title', $this->getContextTitle()->getPrefixedText() ) );
 485                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 486                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 487                 $wgOut->addHTML( "<hr />\n" );
 488
 489                 # If the user made changes, preserve them when showing the markup
 490                 # (This happens when a user is blocked during edit, for instance)
 491                 if ( !$this->firsttime ) {
 492                         $text = $this->textbox1;
 493                         $wgOut->addWikiMsg( 'viewyourtext' );
 494                 } else {
 495                         $text = $this->toEditText( $content );
 496                         $wgOut->addWikiMsg( 'viewsourcetext' );
 497                 }
 498
 499                 $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 500
 501                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 502                         Linker::formatTemplates( $this->getTemplates() ) ) );
 503
 504                 if ( $this->mTitle->exists() ) {
 505                         $wgOut->returnToMain( null, $this->mTitle );
 506                 }
 507         }
 508
 509         /**
 510          * Show a read-only error
 511          * Parameters are the same as OutputPage:readOnlyPage()
 512          * Redirect to the article page if redlink=1
 513          * @deprecated in 1.19; use displayPermissionsError() instead
 514          */
 515         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 516                 wfDeprecated( __METHOD__, '1.19' );
 517
 518                 global $wgRequest, $wgOut;
 519                 if ( $wgRequest->getBool( 'redlink' ) ) {
 520                         // The edit page was reached via a red link.
 521                         // Redirect to the article page and let them click the edit tab if
 522                         // they really want a permission error.
 523                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 524                 } else {
 525                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 526                 }
 527         }
 528
 529         /**
 530          * Should we show a preview when the edit form is first shown?
 531          *
 532          * @return bool
 533          */
 534         protected function previewOnOpen() {
 535                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 536                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 537                         // Explicit override from request
 538                         return true;
 539                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 540                         // Explicit override from request
 541                         return false;
 542                 } elseif ( $this->section == 'new' ) {
 543                         // Nothing *to* preview for new sections
 544                         return false;
 545                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 546                         // Standard preference behaviour
 547                         return true;
 548                 } elseif ( !$this->mTitle->exists() &&
 549                         isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] ) &&
 550                         $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 551                 {
 552                         // Categories are special
 553                         return true;
 554                 } else {
 555                         return false;
 556                 }
 557         }
 558
 559         /**
 560          * Checks whether the user entered a skin name in uppercase,
 561          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 562          *
 563          * @return bool
 564          */
 565         protected function isWrongCaseCssJsPage() {
 566                 if ( $this->mTitle->isCssJsSubpage() ) {
 567                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 568                         $skins = array_merge(
 569                                 array_keys( Skin::getSkinNames() ),
 570                                 array( 'common' )
 571                         );
 572                         return !in_array( $name, $skins )
 573                                 && in_array( strtolower( $name ), $skins );
 574                 } else {
 575                         return false;
 576                 }
 577         }
 578
 579         /**
 580          * Returns whether section editing is supported for the current page.
 581          * Subclasses may override this to replace the default behavior, which is
 582          * to check ContentHandler::supportsSections.
 583          *
 584          * @return bool true if this edit page supports sections, false otherwise.
 585          */
 586         protected function isSectionEditSupported() {
 587                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 588                 return $contentHandler->supportsSections();
 589         }
 590
 591         /**
 592          * This function collects the form data and uses it to populate various member variables.
 593          * @param $request WebRequest
 594          */
 595         function importFormData( &$request ) {
 596                 global $wgContLang, $wgUser;
 597
 598                 wfProfileIn( __METHOD__ );
 599
 600                 # Section edit can come from either the form or a link
 601                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 602
 603                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 604                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 605                 }
 606
 607                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 608
 609                 if ( $request->wasPosted() ) {
 610                         # These fields need to be checked for encoding.
 611                         # Also remove trailing whitespace, but don't remove _initial_
 612                         # whitespace from the text boxes. This may be significant formatting.
 613                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 614                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 615                                 // Skip this if wpTextbox2 has input, it indicates that we came
 616                                 // from a conflict page with raw page text, not a custom form
 617                                 // modified by subclasses
 618                                 wfProfileIn( get_class( $this ) . "::importContentFormData" );
 619                                 $textbox1 = $this->importContentFormData( $request );
 620                                 if ( $textbox1 !== null ) {
 621                                         $this->textbox1 = $textbox1;
 622                                 }
 623
 624                                 wfProfileOut( get_class( $this ) . "::importContentFormData" );
 625                         }
 626
 627                         # Truncate for whole multibyte characters
 628                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 629
 630                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 631                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 632                         # section titles.
 633                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 634
 635                         # Treat sectiontitle the same way as summary.
 636                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 637                         # currently doing double duty as both edit summary and section title. Right now this
 638                         # is just to allow API edits to work around this limitation, but this should be
 639                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 640                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 641                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 642
 643                         $this->edittime = $request->getVal( 'wpEdittime' );
 644                         $this->starttime = $request->getVal( 'wpStarttime' );
 645
 646                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 647
 648                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 649                                 // wpTextbox1 field is missing, possibly due to being "too big"
 650                                 // according to some filter rules such as Suhosin's setting for
 651                                 // suhosin.request.max_value_length (d'oh)
 652                                 $this->incompleteForm = true;
 653                         } else {
 654                                 // edittime should be one of our last fields; if it's missing,
 655                                 // the submission probably broke somewhere in the middle.
 656                                 $this->incompleteForm = is_null( $this->edittime );
 657                         }
 658                         if ( $this->incompleteForm ) {
 659                                 # If the form is incomplete, force to preview.
 660                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 661                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 662                                 $this->preview = true;
 663                         } else {
 664                                 /* Fallback for live preview */
 665                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 666                                 $this->diff = $request->getCheck( 'wpDiff' );
 667
 668                                 // Remember whether a save was requested, so we can indicate
 669                                 // if we forced preview due to session failure.
 670                                 $this->mTriedSave = !$this->preview;
 671
 672                                 if ( $this->tokenOk( $request ) ) {
 673                                         # Some browsers will not report any submit button
 674                                         # if the user hits enter in the comment box.
 675                                         # The unmarked state will be assumed to be a save,
 676                                         # if the form seems otherwise complete.
 677                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 678                                 } elseif ( $this->diff ) {
 679                                         # Failed token check, but only requested "Show Changes".
 680                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 681                                 } else {
 682                                         # Page might be a hack attempt posted from
 683                                         # an external site. Preview instead of saving.
 684                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 685                                         $this->preview = true;
 686                                 }
 687                         }
 688                         $this->save = !$this->preview && !$this->diff;
 689                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 690                                 $this->edittime = null;
 691                         }
 692
 693                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 694                                 $this->starttime = null;
 695                         }
 696
 697                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 698
 699                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 700                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 701
 702                         # Don't force edit summaries when a user is editing their own user or talk page
 703                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 704                                 $this->mTitle->getText() == $wgUser->getName() )
 705                         {
 706                                 $this->allowBlankSummary = true;
 707                         } else {
 708                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary' );
 709                         }
 710
 711                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 712                 } else {
 713                         # Not a posted form? Start with nothing.
 714                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 715                         $this->textbox1     = '';
 716                         $this->summary      = '';
 717                         $this->sectiontitle = '';
 718                         $this->edittime     = '';
 719                         $this->starttime    = wfTimestampNow();
 720                         $this->edit         = false;
 721                         $this->preview      = false;
 722                         $this->save         = false;
 723                         $this->diff         = false;
 724                         $this->minoredit    = false;
 725                         $this->watchthis    = $request->getBool( 'watchthis', false ); // Watch may be overriden by request parameters
 726                         $this->recreate     = false;
 727
 728                         // When creating a new section, we can preload a section title by passing it as the
 729                         // preloadtitle parameter in the URL (Bug 13100)
 730                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 731                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 732                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 733                                 $this->summary = $request->getVal( 'preloadtitle' );
 734                         }
 735                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 736                                 $this->summary = $request->getText( 'summary' );
 737                                 if ( $this->summary !== '' ) {
 738                                         $this->hasPresetSummary = true;
 739                                 }
 740                         }
 741
 742                         if ( $request->getVal( 'minor' ) ) {
 743                                 $this->minoredit = true;
 744                         }
 745                 }
 746
 747                 $this->oldid = $request->getInt( 'oldid' );
 748
 749                 $this->bot = $request->getBool( 'bot', true );
 750                 $this->nosummary = $request->getBool( 'nosummary' );
 751
 752                 $content_handler = ContentHandler::getForTitle( $this->mTitle );
 753                 $this->contentModel = $request->getText( 'model', $content_handler->getModelID() ); #may be overridden by revision
 754                 $this->contentFormat = $request->getText( 'format', $content_handler->getDefaultFormat() ); #may be overridden by revision
 755
 756                 #TODO: check if the desired model is allowed in this namespace, and if a transition from the page's current model to the new model is allowed
 757                 #TODO: check if the desired content model supports the given content format!
 758
 759                 $this->live = $request->getCheck( 'live' );
 760                 $this->editintro = $request->getText( 'editintro',
 761                         // Custom edit intro for new sections
 762                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 763
 764                 // Allow extensions to modify form data
 765                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 766
 767                 wfProfileOut( __METHOD__ );
 768         }
 769
 770         /**
 771          * Subpage overridable method for extracting the page content data from the
 772          * posted form to be placed in $this->textbox1, if using customized input
 773          * this method should be overrided and return the page text that will be used
 774          * for saving, preview parsing and so on...
 775          *
 776          * @param $request WebRequest
 777          */
 778         protected function importContentFormData( &$request ) {
 779                 return; // Don't do anything, EditPage already extracted wpTextbox1
 780         }
 781
 782         /**
 783          * Initialise form fields in the object
 784          * Called on the first invocation, e.g. when a user clicks an edit link
 785          * @return bool -- if the requested section is valid
 786          */
 787         function initialiseForm() {
 788                 global $wgUser;
 789                 $this->edittime = $this->mArticle->getTimestamp();
 790
 791                 $content = $this->getContentObject( false ); #TODO: track content object?!
 792                 if ( $content === false ) {
 793                         return false;
 794                 }
 795                 $this->textbox1 = $this->toEditText( $content );
 796
 797                 // activate checkboxes if user wants them to be always active
 798                 # Sort out the "watch" checkbox
 799                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 800                         # Watch all edits
 801                         $this->watchthis = true;
 802                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 803                         # Watch creations
 804                         $this->watchthis = true;
 805                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
 806                         # Already watched
 807                         $this->watchthis = true;
 808                 }
 809                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 810                         $this->minoredit = true;
 811                 }
 812                 if ( $this->textbox1 === false ) {
 813                         return false;
 814                 }
 815                 wfProxyCheck();
 816                 return true;
 817         }
 818
 819         /**
 820          * Fetch initial editing page content.
 821          *
 822          * @param $def_text string|bool
 823          * @return mixed string on success, $def_text for invalid sections
 824          * @private
 825          * @deprecated since 1.21, get WikiPage::getContent() instead.
 826          */
 827         function getContent( $def_text = false ) {
 828                 ContentHandler::deprecated( __METHOD__, '1.21' );
 829
 830                 if ( $def_text !== null && $def_text !== false && $def_text !== '' ) {
 831                         $def_content = $this->toEditContent( $def_text );
 832                 } else {
 833                         $def_content = false;
 834                 }
 835
 836                 $content = $this->getContentObject( $def_content );
 837
 838                 // Note: EditPage should only be used with text based content anyway.
 839                 return $this->toEditText( $content );
 840         }
 841
 842         /**
 843          * @param Content|null $def_content The default value to return
 844          *
 845          * @return mixed Content on success, $def_content for invalid sections
 846          *
 847          * @since 1.21
 848          */
 849         protected function getContentObject( $def_content = null ) {
 850                 global $wgOut, $wgRequest;
 851
 852                 wfProfileIn( __METHOD__ );
 853
 854                 $content = false;
 855
 856                 // For message page not locally set, use the i18n message.
 857                 // For other non-existent articles, use preload text if any.
 858                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
 859                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
 860                                 # If this is a system message, get the default text.
 861                                 $msg = $this->mTitle->getDefaultMessageText();
 862
 863                                 $content = $this->toEditContent( $msg );
 864                         }
 865                         if ( $content === false ) {
 866                                 # If requested, preload some text.
 867                                 $preload = $wgRequest->getVal( 'preload',
 868                                         // Custom preload text for new sections
 869                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 870
 871                                 $content = $this->getPreloadedContent( $preload );
 872                         }
 873                 // For existing pages, get text based on "undo" or section parameters.
 874                 } else {
 875                         if ( $this->section != '' ) {
 876                                 // Get section edit text (returns $def_text for invalid sections)
 877                                 $orig = $this->getOriginalContent();
 878                                 $content = $orig ? $orig->getSection( $this->section ) : null;
 879
 880                                 if ( !$content ) $content = $def_content;
 881                         } else {
 882                                 $undoafter = $wgRequest->getInt( 'undoafter' );
 883                                 $undo = $wgRequest->getInt( 'undo' );
 884
 885                                 if ( $undo > 0 && $undoafter > 0 ) {
 886                                         if ( $undo < $undoafter ) {
 887                                                 # If they got undoafter and undo round the wrong way, switch them
 888                                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 889                                         }
 890
 891                                         $undorev = Revision::newFromId( $undo );
 892                                         $oldrev = Revision::newFromId( $undoafter );
 893
 894                                         # Sanity check, make sure it's the right page,
 895                                         # the revisions exist and they were not deleted.
 896                                         # Otherwise, $content will be left as-is.
 897                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 898                                                 $undorev->getPage() == $oldrev->getPage() &&
 899                                                 $undorev->getPage() == $this->mTitle->getArticleID() &&
 900                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 901                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 902
 903                                                 $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
 904
 905                                                 if ( $content === false ) {
 906                                                         # Warn the user that something went wrong
 907                                                         $undoMsg = 'failure';
 908                                                 } else {
 909                                                         # Inform the user of our success and set an automatic edit summary
 910                                                         $undoMsg = 'success';
 911
 912                                                         # If we just undid one rev, use an autosummary
 913                                                         $firstrev = $oldrev->getNext();
 914                                                         if ( $firstrev && $firstrev->getId() == $undo ) {
 915                                                                 $undoSummary = wfMessage( 'undo-summary', $undo, $undorev->getUserText() )->inContentLanguage()->text();
 916                                                                 if ( $this->summary === '' ) {
 917                                                                         $this->summary = $undoSummary;
 918                                                                 } else {
 919                                                                         $this->summary = $undoSummary . wfMessage( 'colon-separator' )
 920                                                                                 ->inContentLanguage()->text() . $this->summary;
 921                                                                 }
 922                                                                 $this->undidRev = $undo;
 923                                                         }
 924                                                         $this->formtype = 'diff';
 925                                                 }
 926                                         } else {
 927                                                 // Failed basic sanity checks.
 928                                                 // Older revisions may have been removed since the link
 929                                                 // was created, or we may simply have got bogus input.
 930                                                 $undoMsg = 'norev';
 931                                         }
 932
 933                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
 934                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
 935                                                 wfMessage( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
 936                                 }
 937
 938                                 if ( $content === false ) {
 939                                         $content = $this->getOriginalContent();
 940                                 }
 941                         }
 942                 }
 943
 944                 wfProfileOut( __METHOD__ );
 945                 return $content;
 946         }
 947
 948         /**
 949          * Get the content of the wanted revision, without section extraction.
 950          *
 951          * The result of this function can be used to compare user's input with
 952          * section replaced in its context (using WikiPage::replaceSection())
 953          * to the original text of the edit.
 954          *
 955          * This difers from Article::getContent() that when a missing revision is
 956          * encountered the result will be null and not the
 957          * 'missing-revision' message.
 958          *
 959          * @since 1.19
 960          * @return Content|null
 961          */
 962         private function getOriginalContent() {
 963                 if ( $this->section == 'new' ) {
 964                         return $this->getCurrentContent();
 965                 }
 966                 $revision = $this->mArticle->getRevisionFetched();
 967                 if ( $revision === null ) {
 968                         if ( !$this->contentModel ) $this->contentModel = $this->getTitle()->getContentModel();
 969                         $handler = ContentHandler::getForModelID( $this->contentModel );
 970
 971                         return $handler->makeEmptyContent();
 972                 }
 973                 $content = $revision->getContent();
 974                 return $content;
 975         }
 976
 977         /**
 978          * Get the current content of the page. This is basically similar to
 979          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
 980          * content object is returned instead of null.
 981          *
 982          * @since 1.21
 983          * @return Content
 984          */
 985         protected function getCurrentContent() {
 986                 $rev = $this->mArticle->getRevision();
 987                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
 988
 989                 if ( $content  === false || $content === null ) {
 990                         if ( !$this->contentModel ) $this->contentModel = $this->getTitle()->getContentModel();
 991                         $handler = ContentHandler::getForModelID( $this->contentModel );
 992
 993                         return $handler->makeEmptyContent();
 994                 } else {
 995                         # nasty side-effect, but needed for consistency
 996                         $this->contentModel = $rev->getContentModel();
 997                         $this->contentFormat = $rev->getContentFormat();
 998
 999                         return $content;
1000                 }
1001         }
1002
1003
1004         /**
1005          * Use this method before edit() to preload some text into the edit box
1006          *
1007          * @param $text string
1008          * @deprecated since 1.21, use setPreloadedContent() instead.
1009          */
1010         public function setPreloadedText( $text ) {
1011                 ContentHandler::deprecated( __METHOD__, "1.21" );
1012
1013                 $content = $this->toEditContent( $text );
1014
1015                 $this->setPreloadedContent( $content );
1016         }
1017
1018         /**
1019          * Use this method before edit() to preload some content into the edit box
1020          *
1021          * @param $content Content
1022          *
1023          * @since 1.21
1024          */
1025         public function setPreloadedContent( Content $content ) {
1026                 $this->mPreloadContent = $content;
1027         }
1028
1029         /**
1030          * Get the contents to be preloaded into the box, either set by
1031          * an earlier setPreloadText() or by loading the given page.
1032          *
1033          * @param $preload String: representing the title to preload from.
1034          *
1035          * @return String
1036          *
1037          * @deprecated since 1.21, use getPreloadedContent() instead
1038          */
1039         protected function getPreloadedText( $preload ) {
1040                 ContentHandler::deprecated( __METHOD__, "1.21" );
1041
1042                 $content = $this->getPreloadedContent( $preload );
1043                 $text = $this->toEditText( $content );
1044
1045                 return $text;
1046         }
1047
1048         /**
1049          * Get the contents to be preloaded into the box, either set by
1050          * an earlier setPreloadText() or by loading the given page.
1051          *
1052          * @param $preload String: representing the title to preload from.
1053          *
1054          * @return Content
1055          *
1056          * @since 1.21
1057          */
1058         protected function getPreloadedContent( $preload ) {
1059                 global $wgUser;
1060
1061                 if ( !empty( $this->mPreloadContent ) ) {
1062                         return $this->mPreloadContent;
1063                 }
1064
1065                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1066
1067                 if ( $preload === '' ) {
1068                         return $handler->makeEmptyContent();
1069                 }
1070
1071                 $title = Title::newFromText( $preload );
1072                 # Check for existence to avoid getting MediaWiki:Noarticletext
1073                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1074                         //TODO: somehow show a warning to the user!
1075                         return $handler->makeEmptyContent();
1076                 }
1077
1078                 $page = WikiPage::factory( $title );
1079                 if ( $page->isRedirect() ) {
1080                         $title = $page->getRedirectTarget();
1081                         # Same as before
1082                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1083                                 //TODO: somehow show a warning to the user!
1084                                 return $handler->makeEmptyContent();
1085                         }
1086                         $page = WikiPage::factory( $title );
1087                 }
1088
1089                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1090                 $content = $page->getContent( Revision::RAW );
1091
1092                 if ( !$content ) {
1093                         //TODO: somehow show a warning to the user!
1094                         return $handler->makeEmptyContent();
1095                 }
1096
1097                 if ( $content->getModel() !== $handler->getModelID() ) {
1098                         $converted = $content->convert( $handler->getModelID() );
1099
1100                         if ( !$converted ) {
1101                                 //TODO: somehow show a warning to the user!
1102                                 wfDebug( "Attempt to preload incompatible content: "
1103                                                 . "can't convert " . $content->getModel()
1104                                                 . " to " . $handler->getModelID() );
1105
1106                                 return $handler->makeEmptyContent();
1107                         }
1108
1109                         $content = $converted;
1110                 }
1111
1112                 return $content->preloadTransform( $title, $parserOptions );
1113         }
1114
1115         /**
1116          * Make sure the form isn't faking a user's credentials.
1117          *
1118          * @param $request WebRequest
1119          * @return bool
1120          * @private
1121          */
1122         function tokenOk( &$request ) {
1123                 global $wgUser;
1124                 $token = $request->getVal( 'wpEditToken' );
1125                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1126                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1127                 return $this->mTokenOk;
1128         }
1129
1130         /**
1131          * Attempt submission
1132          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1133          * @return bool false if output is done, true if the rest of the form should be displayed
1134          */
1135         function attemptSave() {
1136                 global $wgUser, $wgOut;
1137
1138                 $resultDetails = false;
1139                 # Allow bots to exempt some edits from bot flagging
1140                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1141                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1142                 // FIXME: once the interface for internalAttemptSave() is made nicer, this should use the message in $status
1143                 if ( $status->value == self::AS_SUCCESS_UPDATE || $status->value == self::AS_SUCCESS_NEW_ARTICLE ) {
1144                         $this->didSave = true;
1145                 }
1146
1147                 switch ( $status->value ) {
1148                         case self::AS_HOOK_ERROR_EXPECTED:
1149                         case self::AS_CONTENT_TOO_BIG:
1150                         case self::AS_ARTICLE_WAS_DELETED:
1151                         case self::AS_CONFLICT_DETECTED:
1152                         case self::AS_SUMMARY_NEEDED:
1153                         case self::AS_TEXTBOX_EMPTY:
1154                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1155                         case self::AS_END:
1156                                 return true;
1157
1158                         case self::AS_HOOK_ERROR:
1159                                 return false;
1160
1161                         case self::AS_PARSE_ERROR:
1162                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>' );
1163                                 return true;
1164
1165                         case self::AS_SUCCESS_NEW_ARTICLE:
1166                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1167                                 $anchor = isset ( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1168                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1169                                 return false;
1170
1171                         case self::AS_SUCCESS_UPDATE:
1172                                 $extraQuery = '';
1173                                 $sectionanchor = $resultDetails['sectionanchor'];
1174
1175                                 // Give extensions a chance to modify URL query on update
1176                                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this->mArticle, &$sectionanchor, &$extraQuery ) );
1177
1178                                 if ( $resultDetails['redirect'] ) {
1179                                         if ( $extraQuery == '' ) {
1180                                                 $extraQuery = 'redirect=no';
1181                                         } else {
1182                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1183                                         }
1184                                 }
1185                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1186                                 return false;
1187
1188                         case self::AS_BLANK_ARTICLE:
1189                                 $wgOut->redirect( $this->getContextTitle()->getFullURL() );
1190                                 return false;
1191
1192                         case self::AS_SPAM_ERROR:
1193                                 $this->spamPageWithContent( $resultDetails['spam'] );
1194                                 return false;
1195
1196                         case self::AS_BLOCKED_PAGE_FOR_USER:
1197                                 throw new UserBlockedError( $wgUser->getBlock() );
1198
1199                         case self::AS_IMAGE_REDIRECT_ANON:
1200                         case self::AS_IMAGE_REDIRECT_LOGGED:
1201                                 throw new PermissionsError( 'upload' );
1202
1203                         case self::AS_READ_ONLY_PAGE_ANON:
1204                         case self::AS_READ_ONLY_PAGE_LOGGED:
1205                                 throw new PermissionsError( 'edit' );
1206
1207                         case self::AS_READ_ONLY_PAGE:
1208                                 throw new ReadOnlyError;
1209
1210                         case self::AS_RATE_LIMITED:
1211                                 throw new ThrottledError();
1212
1213                         case self::AS_NO_CREATE_PERMISSION:
1214                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1215                                 throw new PermissionsError( $permission );
1216
1217                         default:
1218                                 // We don't recognize $status->value. The only way that can happen
1219                                 // is if an extension hook aborted from inside ArticleSave.
1220                                 // Render the status object into $this->hookError
1221                                 // FIXME this sucks, we should just use the Status object throughout
1222                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1223                                         '</div>';
1224                                 return true;
1225                 }
1226         }
1227
1228         /**
1229          * Run hooks that can filter edits just before they get saved.
1230          *
1231          * @param Content $content the Content to filter.
1232          * @param Status  $status for reporting the outcome to the caller
1233          * @param User    $user the user performing the edit
1234          *
1235          * @return bool
1236          */
1237         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1238                 // Run old style post-section-merge edit filter
1239                 if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged',
1240                         array( $this, $content, &$this->hookError, $this->summary ) ) ) {
1241
1242                         # Error messages etc. could be handled within the hook...
1243                         $status->fatal( 'hookaborted' );
1244                         $status->value = self::AS_HOOK_ERROR;
1245                         return false;
1246                 } elseif ( $this->hookError != '' ) {
1247                         # ...or the hook could be expecting us to produce an error
1248                         $status->fatal( 'hookaborted' );
1249                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1250                         return false;
1251                 }
1252
1253                 // Run new style post-section-merge edit filter
1254                 if ( !wfRunHooks( 'EditFilterMergedContent',
1255                         array( $this->mArticle->getContext(), $content, $status, $this->summary,
1256                                 $user, $this->minoredit ) ) ) {
1257
1258                         # Error messages etc. could be handled within the hook...
1259                         // XXX: $status->value may already be something informative...
1260                         $this->hookError = $status->getWikiText();
1261                         $status->fatal( 'hookaborted' );
1262                         $status->value = self::AS_HOOK_ERROR;
1263                         return false;
1264                 } elseif ( !$status->isOK() ) {
1265                         # ...or the hook could be expecting us to produce an error
1266                         // FIXME this sucks, we should just use the Status object throughout
1267                         $this->hookError = $status->getWikiText();
1268                         $status->fatal( 'hookaborted' );
1269                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1270                         return false;
1271                 }
1272
1273                 return true;
1274         }
1275
1276         /**
1277          * Attempt submission (no UI)
1278          *
1279          * @param $result
1280          * @param $bot bool
1281          *
1282          * @return Status object, possibly with a message, but always with one of the AS_* constants in $status->value,
1283          *
1284          * FIXME: This interface is TERRIBLE, but hard to get rid of due to various error display idiosyncrasies. There are
1285          * also lots of cases where error metadata is set in the object and retrieved later instead of being returned, e.g.
1286          * AS_CONTENT_TOO_BIG and AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some time.
1287          */
1288         function internalAttemptSave( &$result, $bot = false ) {
1289                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1290
1291                 $status = Status::newGood();
1292
1293                 wfProfileIn( __METHOD__ );
1294                 wfProfileIn( __METHOD__ . '-checks' );
1295
1296                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
1297                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1298                         $status->fatal( 'hookaborted' );
1299                         $status->value = self::AS_HOOK_ERROR;
1300                         wfProfileOut( __METHOD__ . '-checks' );
1301                         wfProfileOut( __METHOD__ );
1302                         return $status;
1303                 }
1304
1305                 try {
1306                         # Construct Content object
1307                         $textbox_content = $this->toEditContent( $this->textbox1 );
1308                 } catch ( MWContentSerializationException $ex ) {
1309                         $status->fatal( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
1310                         $status->value = self::AS_PARSE_ERROR;
1311                         wfProfileOut( __METHOD__ . '-checks' );
1312                         wfProfileOut( __METHOD__ );
1313                         return $status;
1314                 }
1315
1316                 # Check image redirect
1317                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1318                         $textbox_content->isRedirect() &&
1319                         !$wgUser->isAllowed( 'upload' ) ) {
1320                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1321                                 $status->setResult( false, $code );
1322
1323                                 wfProfileOut( __METHOD__ . '-checks' );
1324                                 wfProfileOut( __METHOD__ );
1325
1326                                 return $status;
1327                 }
1328
1329                 # Check for spam
1330                 $match = self::matchSummarySpamRegex( $this->summary );
1331                 if ( $match === false ) {
1332                         $match = self::matchSpamRegex( $this->textbox1 );
1333                 }
1334                 if ( $match !== false ) {
1335                         $result['spam'] = $match;
1336                         $ip = $wgRequest->getIP();
1337                         $pdbk = $this->mTitle->getPrefixedDBkey();
1338                         $match = str_replace( "\n", '', $match );
1339                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1340                         $status->fatal( 'spamprotectionmatch', $match );
1341                         $status->value = self::AS_SPAM_ERROR;
1342                         wfProfileOut( __METHOD__ . '-checks' );
1343                         wfProfileOut( __METHOD__ );
1344                         return $status;
1345                 }
1346                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
1347                         # Error messages etc. could be handled within the hook...
1348                         $status->fatal( 'hookaborted' );
1349                         $status->value = self::AS_HOOK_ERROR;
1350                         wfProfileOut( __METHOD__ . '-checks' );
1351                         wfProfileOut( __METHOD__ );
1352                         return $status;
1353                 } elseif ( $this->hookError != '' ) {
1354                         # ...or the hook could be expecting us to produce an error
1355                         $status->fatal( 'hookaborted' );
1356                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1357                         wfProfileOut( __METHOD__ . '-checks' );
1358                         wfProfileOut( __METHOD__ );
1359                         return $status;
1360                 }
1361
1362                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1363                         // Auto-block user's IP if the account was "hard" blocked
1364                         $wgUser->spreadAnyEditBlock();
1365                         # Check block state against master, thus 'false'.
1366                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1367                         wfProfileOut( __METHOD__ . '-checks' );
1368                         wfProfileOut( __METHOD__ );
1369                         return $status;
1370                 }
1371
1372                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1373                 if ( $this->kblength > $wgMaxArticleSize ) {
1374                         // Error will be displayed by showEditForm()
1375                         $this->tooBig = true;
1376                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1377                         wfProfileOut( __METHOD__ . '-checks' );
1378                         wfProfileOut( __METHOD__ );
1379                         return $status;
1380                 }
1381
1382                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1383                         if ( $wgUser->isAnon() ) {
1384                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1385                                 wfProfileOut( __METHOD__ . '-checks' );
1386                                 wfProfileOut( __METHOD__ );
1387                                 return $status;
1388                         } else {
1389                                 $status->fatal( 'readonlytext' );
1390                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1391                                 wfProfileOut( __METHOD__ . '-checks' );
1392                                 wfProfileOut( __METHOD__ );
1393                                 return $status;
1394                         }
1395                 }
1396
1397                 if ( wfReadOnly() ) {
1398                         $status->fatal( 'readonlytext' );
1399                         $status->value = self::AS_READ_ONLY_PAGE;
1400                         wfProfileOut( __METHOD__ . '-checks' );
1401                         wfProfileOut( __METHOD__ );
1402                         return $status;
1403                 }
1404                 if ( $wgUser->pingLimiter() ) {
1405                         $status->fatal( 'actionthrottledtext' );
1406                         $status->value = self::AS_RATE_LIMITED;
1407                         wfProfileOut( __METHOD__ . '-checks' );
1408                         wfProfileOut( __METHOD__ );
1409                         return $status;
1410                 }
1411
1412                 # If the article has been deleted while editing, don't save it without
1413                 # confirmation
1414                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1415                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1416                         wfProfileOut( __METHOD__ . '-checks' );
1417                         wfProfileOut( __METHOD__ );
1418                         return $status;
1419                 }
1420
1421                 wfProfileOut( __METHOD__ . '-checks' );
1422
1423                 # Load the page data from the master. If anything changes in the meantime,
1424                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1425                 $this->mArticle->loadPageData( 'fromdbmaster' );
1426                 $new = !$this->mArticle->exists();
1427
1428                 if ( $new ) {
1429                         // Late check for create permission, just in case *PARANOIA*
1430                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1431                                 $status->fatal( 'nocreatetext' );
1432                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1433                                 wfDebug( __METHOD__ . ": no create permission\n" );
1434                                 wfProfileOut( __METHOD__ );
1435                                 return $status;
1436                         }
1437
1438                         # Don't save a new article if it's blank.
1439                         if ( $this->textbox1 == '' ) {
1440                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1441                                 wfProfileOut( __METHOD__ );
1442                                 return $status;
1443                         }
1444
1445                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1446                                 wfProfileOut( __METHOD__ );
1447                                 return $status;
1448                         }
1449
1450                         $content = $textbox_content;
1451
1452                         $result['sectionanchor'] = '';
1453                         if ( $this->section == 'new' ) {
1454                                 if ( $this->sectiontitle !== '' ) {
1455                                         // Insert the section title above the content.
1456                                         $content = $content->addSectionHeader( $this->sectiontitle );
1457
1458                                         // Jump to the new section
1459                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1460
1461                                         // If no edit summary was specified, create one automatically from the section
1462                                         // title and have it link to the new section. Otherwise, respect the summary as
1463                                         // passed.
1464                                         if ( $this->summary === '' ) {
1465                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1466                                                 $this->summary = wfMessage( 'newsectionsummary' )
1467                                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1468                                         }
1469                                 } elseif ( $this->summary !== '' ) {
1470                                         // Insert the section title above the content.
1471                                         $content = $content->addSectionHeader( $this->summary );
1472
1473                                         // Jump to the new section
1474                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1475
1476                                         // Create a link to the new section from the edit summary.
1477                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1478                                         $this->summary = wfMessage( 'newsectionsummary' )
1479                                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1480                                 }
1481                         }
1482
1483                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1484
1485                 } else { # not $new
1486
1487                         # Article exists. Check for edit conflict.
1488
1489                         $this->mArticle->clear(); # Force reload of dates, etc.
1490                         $timestamp = $this->mArticle->getTimestamp();
1491
1492                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1493
1494                         if ( $timestamp != $this->edittime ) {
1495                                 $this->isConflict = true;
1496                                 if ( $this->section == 'new' ) {
1497                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1498                                                 $this->mArticle->getComment() == $this->summary ) {
1499                                                 // Probably a duplicate submission of a new comment.
1500                                                 // This can happen when squid resends a request after
1501                                                 // a timeout but the first one actually went through.
1502                                                 wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
1503                                         } else {
1504                                                 // New comment; suppress conflict.
1505                                                 $this->isConflict = false;
1506                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1507                                         }
1508                                 } elseif ( $this->section == '' && Revision::userWasLastToEdit( DB_MASTER, $this->mTitle->getArticleID(),
1509                                                         $wgUser->getId(), $this->edittime ) ) {
1510                                         # Suppress edit conflict with self, except for section edits where merging is required.
1511                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1512                                         $this->isConflict = false;
1513                                 }
1514                         }
1515
1516                         // If sectiontitle is set, use it, otherwise use the summary as the section title (for
1517                         // backwards compatibility with old forms/bots).
1518                         if ( $this->sectiontitle !== '' ) {
1519                                 $sectionTitle = $this->sectiontitle;
1520                         } else {
1521                                 $sectionTitle = $this->summary;
1522                         }
1523
1524                         $content = null;
1525
1526                         if ( $this->isConflict ) {
1527                                 wfDebug( __METHOD__ . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1528                                                 . " (article time '{$timestamp}')\n" );
1529
1530                                 $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle, $this->edittime );
1531                         } else {
1532                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1533                                 $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle );
1534                         }
1535
1536                         if ( is_null( $content ) ) {
1537                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1538                                 $this->isConflict = true;
1539                                 $content = $textbox_content; // do not try to merge here!
1540                         } elseif ( $this->isConflict ) {
1541                                 # Attempt merge
1542                                 if ( $this->mergeChangesIntoContent( $content ) ) {
1543                                         // Successful merge! Maybe we should tell the user the good news?
1544                                         $this->isConflict = false;
1545                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1546                                 } else {
1547                                         $this->section = '';
1548                                         $this->textbox1 = ContentHandler::getContentText( $content );
1549                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1550                                 }
1551                         }
1552
1553                         if ( $this->isConflict ) {
1554                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1555                                 wfProfileOut( __METHOD__ );
1556                                 return $status;
1557                         }
1558
1559                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
1560                                 wfProfileOut( __METHOD__ );
1561                                 return $status;
1562                         }
1563
1564                         if ( $this->section == 'new' ) {
1565                                 // Handle the user preference to force summaries here
1566                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
1567                                         $this->missingSummary = true;
1568                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1569                                         $status->value = self::AS_SUMMARY_NEEDED;
1570                                         wfProfileOut( __METHOD__ );
1571                                         return $status;
1572                                 }
1573
1574                                 // Do not allow the user to post an empty comment
1575                                 if ( $this->textbox1 == '' ) {
1576                                         $this->missingComment = true;
1577                                         $status->fatal( 'missingcommenttext' );
1578                                         $status->value = self::AS_TEXTBOX_EMPTY;
1579                                         wfProfileOut( __METHOD__ );
1580                                         return $status;
1581                                 }
1582                         } elseif ( !$this->allowBlankSummary
1583                                 && !$content->equals( $this->getOriginalContent() )
1584                                 && !$content->isRedirect()
1585                                 && md5( $this->summary ) == $this->autoSumm
1586                         ) {
1587                                 $this->missingSummary = true;
1588                                 $status->fatal( 'missingsummary' );
1589                                 $status->value = self::AS_SUMMARY_NEEDED;
1590                                 wfProfileOut( __METHOD__ );
1591                                 return $status;
1592                         }
1593
1594                         # All's well
1595                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1596                         $sectionanchor = '';
1597                         if ( $this->section == 'new' ) {
1598                                 if ( $this->sectiontitle !== '' ) {
1599                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1600                                         // If no edit summary was specified, create one automatically from the section
1601                                         // title and have it link to the new section. Otherwise, respect the summary as
1602                                         // passed.
1603                                         if ( $this->summary === '' ) {
1604                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1605                                                 $this->summary = wfMessage( 'newsectionsummary' )
1606                                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1607                                         }
1608                                 } elseif ( $this->summary !== '' ) {
1609                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1610                                         # This is a new section, so create a link to the new section
1611                                         # in the revision summary.
1612                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1613                                         $this->summary = wfMessage( 'newsectionsummary' )
1614                                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1615                                 }
1616                         } elseif ( $this->section != '' ) {
1617                                 # Try to get a section anchor from the section source, redirect to edited section if header found
1618                                 # XXX: might be better to integrate this into Article::replaceSection
1619                                 # for duplicate heading checking and maybe parsing
1620                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1621                                 # we can't deal with anchors, includes, html etc in the header for now,
1622                                 # headline would need to be parsed to improve this
1623                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1624                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1625                                 }
1626                         }
1627                         $result['sectionanchor'] = $sectionanchor;
1628                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1629
1630                         // Save errors may fall down to the edit form, but we've now
1631                         // merged the section into full text. Clear the section field
1632                         // so that later submission of conflict forms won't try to
1633                         // replace that into a duplicated mess.
1634                         $this->textbox1 = $this->toEditText( $content );
1635                         $this->section = '';
1636
1637                         $status->value = self::AS_SUCCESS_UPDATE;
1638                 }
1639
1640                 // Check for length errors again now that the section is merged in
1641                         $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1642                 if ( $this->kblength > $wgMaxArticleSize ) {
1643                         $this->tooBig = true;
1644                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1645                         wfProfileOut( __METHOD__ );
1646                         return $status;
1647                 }
1648
1649                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1650                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1651                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1652                         ( $bot ? EDIT_FORCE_BOT : 0 );
1653
1654                         $doEditStatus = $this->mArticle->doEditContent( $content, $this->summary, $flags,
1655                                                                                                                         false, null, $this->contentFormat );
1656
1657                 if ( !$doEditStatus->isOK() ) {
1658                         // Failure from doEdit()
1659                         // Show the edit conflict page for certain recognized errors from doEdit(),
1660                         // but don't show it for errors from extension hooks
1661                         $errors = $doEditStatus->getErrorsArray();
1662                         if ( in_array( $errors[0][0], array( 'edit-gone-missing', 'edit-conflict',
1663                                 'edit-already-exists' ) ) )
1664                         {
1665                                 $this->isConflict = true;
1666                                 // Destroys data doEdit() put in $status->value but who cares
1667                                 $doEditStatus->value = self::AS_END;
1668                         }
1669                         wfProfileOut( __METHOD__ );
1670                         return $doEditStatus;
1671                 }
1672
1673                 $result['redirect'] = $content->isRedirect();
1674                 $this->updateWatchlist();
1675                 wfProfileOut( __METHOD__ );
1676                 return $status;
1677         }
1678
1679         /**
1680          * Register the change of watch status
1681          */
1682         protected function updateWatchlist() {
1683                 global $wgUser;
1684
1685                 if ( $wgUser->isLoggedIn() && $this->watchthis != $wgUser->isWatched( $this->mTitle ) ) {
1686                         $fname = __METHOD__;
1687                         $title = $this->mTitle;
1688                         $watch = $this->watchthis;
1689
1690                         // Do this in its own transaction to reduce contention...
1691                         $dbw = wfGetDB( DB_MASTER );
1692                         $dbw->onTransactionIdle( function() use ( $dbw, $title, $watch, $wgUser, $fname ) {
1693                                 $dbw->begin( $fname );
1694                                 if ( $watch ) {
1695                                         WatchAction::doWatch( $title, $wgUser );
1696                                 } else {
1697                                         WatchAction::doUnwatch( $title, $wgUser );
1698                                 }
1699                                 $dbw->commit( $fname );
1700                         } );
1701                 }
1702         }
1703
1704         /**
1705          * Attempts to merge text content with base and current revisions
1706          *
1707          * @param $editText string
1708          *
1709          * @return bool
1710          * @deprecated since 1.21, use mergeChangesIntoContent() instead
1711          */
1712         function mergeChangesInto( &$editText ) {
1713                 ContentHandler::deprecated( __METHOD__, "1.21" );
1714
1715                 $editContent = $this->toEditContent( $editText );
1716
1717                 $ok = $this->mergeChangesIntoContent( $editContent );
1718
1719                 if ( $ok ) {
1720                         $editText = $this->toEditText( $editContent );
1721                         return true;
1722                 }
1723                 return false;
1724         }
1725
1726         /**
1727          * Attempts to do 3-way merge of edit content with a base revision
1728          * and current content, in case of edit conflict, in whichever way appropriate
1729          * for the content type.
1730          *
1731          * @since 1.21
1732          *
1733          * @param $editContent
1734          *
1735          * @return bool
1736          */
1737         private function mergeChangesIntoContent( &$editContent ) {
1738                 wfProfileIn( __METHOD__ );
1739
1740                 $db = wfGetDB( DB_MASTER );
1741
1742                 // This is the revision the editor started from
1743                 $baseRevision = $this->getBaseRevision();
1744                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
1745
1746                 if ( is_null( $baseContent ) ) {
1747                         wfProfileOut( __METHOD__ );
1748                         return false;
1749                 }
1750
1751                 // The current state, we want to merge updates into it
1752                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1753                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
1754
1755                 if ( is_null( $currentContent ) ) {
1756                         wfProfileOut( __METHOD__ );
1757                         return false;
1758                 }
1759
1760                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
1761
1762                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
1763
1764                 if ( $result ) {
1765                         $editContent = $result;
1766                         wfProfileOut( __METHOD__ );
1767                         return true;
1768                 }
1769
1770                 wfProfileOut( __METHOD__ );
1771                 return false;
1772         }
1773
1774         /**
1775          * @return Revision
1776          */
1777         function getBaseRevision() {
1778                 if ( !$this->mBaseRevision ) {
1779                         $db = wfGetDB( DB_MASTER );
1780                         $baseRevision = Revision::loadFromTimestamp(
1781                                 $db, $this->mTitle, $this->edittime );
1782                         return $this->mBaseRevision = $baseRevision;
1783                 } else {
1784                         return $this->mBaseRevision;
1785                 }
1786         }
1787
1788         /**
1789          * Check given input text against $wgSpamRegex, and return the text of the first match.
1790          *
1791          * @param $text string
1792          *
1793          * @return string|bool matching string or false
1794          */
1795         public static function matchSpamRegex( $text ) {
1796                 global $wgSpamRegex;
1797                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1798                 $regexes = (array)$wgSpamRegex;
1799                 return self::matchSpamRegexInternal( $text, $regexes );
1800         }
1801
1802         /**
1803          * Check given input text against $wgSpamRegex, and return the text of the first match.
1804          *
1805          * @param $text string
1806          *
1807          * @return string|bool  matching string or false
1808          */
1809         public static function matchSummarySpamRegex( $text ) {
1810                 global $wgSummarySpamRegex;
1811                 $regexes = (array)$wgSummarySpamRegex;
1812                 return self::matchSpamRegexInternal( $text, $regexes );
1813         }
1814
1815         /**
1816          * @param $text string
1817          * @param $regexes array
1818          * @return bool|string
1819          */
1820         protected static function matchSpamRegexInternal( $text, $regexes ) {
1821                 foreach ( $regexes as $regex ) {
1822                         $matches = array();
1823                         if ( preg_match( $regex, $text, $matches ) ) {
1824                                 return $matches[0];
1825                         }
1826                 }
1827                 return false;
1828         }
1829
1830         function setHeaders() {
1831                 global $wgOut, $wgUser;
1832
1833                 $wgOut->addModules( 'mediawiki.action.edit' );
1834
1835                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
1836                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
1837                 }
1838                 // Bug #19334: textarea jumps when editing articles in IE8
1839                 $wgOut->addStyle( 'common/IE80Fixes.css', 'screen', 'IE 8' );
1840
1841                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1842
1843                 # Enabled article-related sidebar, toplinks, etc.
1844                 $wgOut->setArticleRelated( true );
1845
1846                 $contextTitle = $this->getContextTitle();
1847                 if ( $this->isConflict ) {
1848                         $msg = 'editconflict';
1849                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
1850                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1851                 } else {
1852                         $msg = $contextTitle->exists() || ( $contextTitle->getNamespace() == NS_MEDIAWIKI && $contextTitle->getDefaultMessageText() !== false ) ?
1853                                 'editing' : 'creating';
1854                 }
1855                 # Use the title defined by DISPLAYTITLE magic word when present
1856                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
1857                 if ( $displayTitle === false ) {
1858                         $displayTitle = $contextTitle->getPrefixedText();
1859                 }
1860                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
1861         }
1862
1863         /**
1864          * Show all applicable editing introductions
1865          */
1866         protected function showIntro() {
1867                 global $wgOut, $wgUser;
1868                 if ( $this->suppressIntro ) {
1869                         return;
1870                 }
1871
1872                 $namespace = $this->mTitle->getNamespace();
1873
1874                 if ( $namespace == NS_MEDIAWIKI ) {
1875                         # Show a warning if editing an interface message
1876                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
1877                 } else if( $namespace == NS_FILE ) {
1878                         # Show a hint to shared repo
1879                         $file = wfFindFile( $this->mTitle );
1880                         if( $file && !$file->isLocal() ) {
1881                                 $descUrl = $file->getDescriptionUrl();
1882                                 # there must be a description url to show a hint to shared repo
1883                                 if( $descUrl ) {
1884                                         if( !$this->mTitle->exists() ) {
1885                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array (
1886                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
1887                                                 ) );
1888                                         } else {
1889                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
1890                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
1891                                                 ) );
1892                                         }
1893                                 }
1894                         }
1895                 }
1896
1897                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
1898                 # Show log extract when the user is currently blocked
1899                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
1900                         $parts = explode( '/', $this->mTitle->getText(), 2 );
1901                         $username = $parts[0];
1902                         $user = User::newFromName( $username, false /* allow IP users*/ );
1903                         $ip = User::isIP( $username );
1904                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
1905                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
1906                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
1907                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
1908                                 LogEventsList::showLogExtract(
1909                                         $wgOut,
1910                                         'block',
1911                                         $user->getUserPage(),
1912                                         '',
1913                                         array(
1914                                                 'lim' => 1,
1915                                                 'showIfEmpty' => false,
1916                                                 'msgKey' => array(
1917                                                         'blocked-notice-logextract',
1918                                                         $user->getName() # Support GENDER in notice
1919                                                 )
1920                                         )
1921                                 );
1922                         }
1923                 }
1924                 # Try to add a custom edit intro, or use the standard one if this is not possible.
1925                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
1926                         if ( $wgUser->isLoggedIn() ) {
1927                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
1928                         } else {
1929                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
1930                         }
1931                 }
1932                 # Give a notice if the user is editing a deleted/moved page...
1933                 if ( !$this->mTitle->exists() ) {
1934                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
1935                                 '',
1936                                 array(
1937                                         'lim' => 10,
1938                                         'conds' => array( "log_action != 'revision'" ),
1939                                         'showIfEmpty' => false,
1940                                         'msgKey' => array( 'recreate-moveddeleted-warn' )
1941                                 )
1942                         );
1943                 }
1944         }
1945
1946         /**
1947          * Attempt to show a custom editing introduction, if supplied
1948          *
1949          * @return bool
1950          */
1951         protected function showCustomIntro() {
1952                 if ( $this->editintro ) {
1953                         $title = Title::newFromText( $this->editintro );
1954                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
1955                                 global $wgOut;
1956                                 // Added using template syntax, to take <noinclude>'s into account.
1957                                 $wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
1958                                 return true;
1959                         }
1960                 }
1961                 return false;
1962         }
1963
1964         /**
1965          * Gets an editable textual representation of $content.
1966          * The textual representation can be turned by into a Content object by the
1967          * toEditContent() method.
1968          *
1969          * If $content is null or false or a string, $content is returned unchanged.
1970          *
1971          * If the given Content object is not of a type that can be edited using the text base EditPage,
1972          * an exception will be raised. Set $this->allowNonTextContent to true to allow editing of non-textual
1973          * content.
1974          *
1975          * @param Content|null|bool|string $content
1976          * @return String the editable text form of the content.
1977          *
1978          * @throws MWException if $content is not an instance of TextContent and $this->allowNonTextContent is not true.
1979          */
1980         protected function toEditText( $content ) {
1981                 if ( $content === null || $content === false ) {
1982                         return $content;
1983                 }
1984
1985                 if ( is_string( $content ) ) {
1986                         return $content;
1987                 }
1988
1989                 if ( !$this->allowNonTextContent && !( $content instanceof TextContent ) ) {
1990                         throw new MWException( "This content model can not be edited as text: "
1991                                                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
1992                 }
1993
1994                 return $content->serialize( $this->contentFormat );
1995         }
1996
1997         /**
1998          * Turns the given text into a Content object by unserializing it.
1999          *
2000          * If the resulting Content object is not of a type that can be edited using the text base EditPage,
2001          * an exception will be raised. Set $this->allowNonTextContent to true to allow editing of non-textual
2002          * content.
2003          *
2004          * @param String|null|bool $text Text to unserialize
2005          * @return Content The content object created from $text. If $text was false or null, false resp. null will be
2006          *                 returned instead.
2007          *
2008          * @throws MWException if unserializing the text results in a Content object that is not an instance of TextContent
2009          *          and $this->allowNonTextContent is not true.
2010          */
2011         protected function toEditContent( $text ) {
2012                 if ( $text === false || $text === null ) {
2013                         return $text;
2014                 }
2015
2016                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2017                         $this->contentModel, $this->contentFormat );
2018
2019                 if ( !$this->allowNonTextContent && !( $content instanceof TextContent ) ) {
2020                         throw new MWException( "This content model can not be edited as text: "
2021                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2022                 }
2023
2024                 return $content;
2025         }
2026
2027         /**
2028          * Send the edit form and related headers to $wgOut
2029          * @param $formCallback Callback|null that takes an OutputPage parameter; will be called
2030          *     during form output near the top, for captchas and the like.
2031          */
2032         function showEditForm( $formCallback = null ) {
2033                 global $wgOut, $wgUser;
2034
2035                 wfProfileIn( __METHOD__ );
2036
2037                 # need to parse the preview early so that we know which templates are used,
2038                 # otherwise users with "show preview after edit box" will get a blank list
2039                 # we parse this near the beginning so that setHeaders can do the title
2040                 # setting work instead of leaving it in getPreviewText
2041                 $previewOutput = '';
2042                 if ( $this->formtype == 'preview' ) {
2043                         $previewOutput = $this->getPreviewText();
2044                 }
2045
2046                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
2047
2048                 $this->setHeaders();
2049
2050                 if ( $this->showHeader() === false ) {
2051                         wfProfileOut( __METHOD__ );
2052                         return;
2053                 }
2054
2055                 $wgOut->addHTML( $this->editFormPageTop );
2056
2057                 if ( $wgUser->getOption( 'previewontop' ) ) {
2058                         $this->displayPreviewArea( $previewOutput, true );
2059                 }
2060
2061                 $wgOut->addHTML( $this->editFormTextTop );
2062
2063                 $showToolbar = true;
2064                 if ( $this->wasDeletedSinceLastEdit() ) {
2065                         if ( $this->formtype == 'save' ) {
2066                                 // Hide the toolbar and edit area, user can click preview to get it back
2067                                 // Add an confirmation checkbox and explanation.
2068                                 $showToolbar = false;
2069                         } else {
2070                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2071                                         'deletedwhileediting' );
2072                         }
2073                 }
2074
2075                 //@todo: add EditForm plugin interface and use it here!
2076                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2077                 $wgOut->addHTML( Html::openElement( 'form', array( 'id' => self::EDITFORM_ID, 'name' => self::EDITFORM_ID,
2078                         'method' => 'post', 'action' => $this->getActionURL( $this->getContextTitle() ),
2079                         'enctype' => 'multipart/form-data' ) ) );
2080
2081                 if ( is_callable( $formCallback ) ) {
2082                         call_user_func_array( $formCallback, array( &$wgOut ) );
2083                 }
2084
2085                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
2086
2087                 // Put these up at the top to ensure they aren't lost on early form submission
2088                 $this->showFormBeforeText();
2089
2090                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2091                         $username = $this->lastDelete->user_name;
2092                         $comment = $this->lastDelete->log_comment;
2093
2094                         // It is better to not parse the comment at all than to have templates expanded in the middle
2095                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2096                         $key = $comment === ''
2097                                 ? 'confirmrecreate-noreason'
2098                                 : 'confirmrecreate';
2099                         $wgOut->addHTML(
2100                                 '<div class="mw-confirm-recreate">' .
2101                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2102                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2103                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2104                                 ) .
2105                                 '</div>'
2106                         );
2107                 }
2108
2109                 # When the summary is hidden, also hide them on preview/show changes
2110                 if( $this->nosummary ) {
2111                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2112                 }
2113
2114                 # If a blank edit summary was previously provided, and the appropriate
2115                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2116                 # user being bounced back more than once in the event that a summary
2117                 # is not required.
2118                 #####
2119                 # For a bit more sophisticated detection of blank summaries, hash the
2120                 # automatic one and pass that in the hidden field wpAutoSummary.
2121                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2122                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2123                 }
2124
2125                 if ( $this->undidRev ) {
2126                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2127                 }
2128
2129                 if ( $this->hasPresetSummary ) {
2130                         // If a summary has been preset using &summary= we dont want to prompt for
2131                         // a different summary. Only prompt for a summary if the summary is blanked.
2132                         // (Bug 17416)
2133                         $this->autoSumm = md5( '' );
2134                 }
2135
2136                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2137                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2138
2139                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2140
2141                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2142                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2143
2144                 if ( $this->section == 'new' ) {
2145                         $this->showSummaryInput( true, $this->summary );
2146                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2147                 }
2148
2149                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2150
2151                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2152                         $wgOut->addHTML( EditPage::getEditToolbar() );
2153                 }
2154
2155                 if ( $this->isConflict ) {
2156                         // In an edit conflict bypass the overrideable content form method
2157                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2158                         // resolved between page source edits and custom ui edits using the
2159                         // custom edit ui.
2160                         $this->textbox2 = $this->textbox1;
2161
2162                         $content = $this->getCurrentContent();
2163                         $this->textbox1 = $this->toEditText( $content );
2164
2165                         $this->showTextbox1();
2166                 } else {
2167                         $this->showContentForm();
2168                 }
2169
2170                 $wgOut->addHTML( $this->editFormTextAfterContent );
2171
2172                 $this->showStandardInputs();
2173
2174                 $this->showFormAfterText();
2175
2176                 $this->showTosSummary();
2177
2178                 $this->showEditTools();
2179
2180                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2181
2182                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2183                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2184
2185                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2186                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2187
2188                 if ( $this->isConflict ) {
2189                         try {
2190                                 $this->showConflict();
2191                         } catch ( MWContentSerializationException $ex ) {
2192                                 // this can't really happen, but be nice if it does.
2193                                 $msg = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
2194                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2195                         }
2196                 }
2197
2198                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2199
2200                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2201                         $this->displayPreviewArea( $previewOutput, false );
2202                 }
2203
2204                 wfProfileOut( __METHOD__ );
2205         }
2206
2207         /**
2208          * Extract the section title from current section text, if any.
2209          *
2210          * @param string $text
2211          * @return Mixed|string or false
2212          */
2213         public static function extractSectionTitle( $text ) {
2214                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2215                 if ( !empty( $matches[2] ) ) {
2216                         global $wgParser;
2217                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2218                 } else {
2219                         return false;
2220                 }
2221         }
2222
2223         protected function showHeader() {
2224                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2225
2226                 if ( $this->mTitle->isTalkPage() ) {
2227                         $wgOut->addWikiMsg( 'talkpagetext' );
2228                 }
2229
2230                 // Add edit notices
2231                 $wgOut->addHTML( implode( "\n", $this->mTitle->getEditNotices() ) );
2232
2233                 if ( $this->isConflict ) {
2234                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2235                         $this->edittime = $this->mArticle->getTimestamp();
2236                 } else {
2237                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2238                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2239                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2240                                 // Someone is welcome to try refactoring though
2241                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2242                                 return false;
2243                         }
2244
2245                         if ( $this->section != '' && $this->section != 'new' ) {
2246                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2247                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); //FIXME: use Content object
2248                                         if ( $sectionTitle !== false ) {
2249                                                 $this->summary = "/* $sectionTitle */ ";
2250                                         }
2251                                 }
2252                         }
2253
2254                         if ( $this->missingComment ) {
2255                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2256                         }
2257
2258                         if ( $this->missingSummary && $this->section != 'new' ) {
2259                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2260                         }
2261
2262                         if ( $this->missingSummary && $this->section == 'new' ) {
2263                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2264                         }
2265
2266                         if ( $this->hookError !== '' ) {
2267                                 $wgOut->addWikiText( $this->hookError );
2268                         }
2269
2270                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2271                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2272                         }
2273
2274                         if ( $this->section != 'new' ) {
2275                                 $revision = $this->mArticle->getRevisionFetched();
2276                                 if ( $revision ) {
2277                                         // Let sysop know that this will make private content public if saved
2278
2279                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2280                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
2281                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2282                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
2283                                         }
2284
2285                                         if ( !$revision->isCurrent() ) {
2286                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2287                                                 $wgOut->addWikiMsg( 'editingold' );
2288                                         }
2289                                 } elseif ( $this->mTitle->exists() ) {
2290                                         // Something went wrong
2291
2292                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2293                                                 array( 'missing-revision', $this->oldid ) );
2294                                 }
2295                         }
2296                 }
2297
2298                 if ( wfReadOnly() ) {
2299                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
2300                 } elseif ( $wgUser->isAnon() ) {
2301                         if ( $this->formtype != 'preview' ) {
2302                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
2303                         } else {
2304                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
2305                         }
2306                 } else {
2307                         if ( $this->isCssJsSubpage ) {
2308                                 # Check the skin exists
2309                                 if ( $this->isWrongCaseCssJsPage ) {
2310                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
2311                                 }
2312                                 if ( $this->formtype !== 'preview' ) {
2313                                         if ( $this->isCssSubpage ) {
2314                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
2315                                         }
2316
2317                                         if ( $this->isJsSubpage ) {
2318                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
2319                                         }
2320                                 }
2321                         }
2322                 }
2323
2324                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2325                         # Is the title semi-protected?
2326                         if ( $this->mTitle->isSemiProtected() ) {
2327                                 $noticeMsg = 'semiprotectedpagewarning';
2328                         } else {
2329                                 # Then it must be protected based on static groups (regular)
2330                                 $noticeMsg = 'protectedpagewarning';
2331                         }
2332                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2333                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2334                 }
2335                 if ( $this->mTitle->isCascadeProtected() ) {
2336                         # Is this page under cascading protection from some source pages?
2337                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2338                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2339                         $cascadeSourcesCount = count( $cascadeSources );
2340                         if ( $cascadeSourcesCount > 0 ) {
2341                                 # Explain, and list the titles responsible
2342                                 foreach ( $cascadeSources as $page ) {
2343                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2344                                 }
2345                         }
2346                         $notice .= '</div>';
2347                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2348                 }
2349                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2350                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2351                                 array( 'lim' => 1,
2352                                         'showIfEmpty' => false,
2353                                         'msgKey' => array( 'titleprotectedwarning' ),
2354                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2355                 }
2356
2357                 if ( $this->kblength === false ) {
2358                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2359                 }
2360
2361                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2362                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2363                                 array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
2364                 } else {
2365                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2366                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2367                                         array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
2368                                 );
2369                         }
2370                 }
2371                 # Add header copyright warning
2372                 $this->showHeaderCopyrightWarning();
2373         }
2374
2375
2376         /**
2377          * Standard summary input and label (wgSummary), abstracted so EditPage
2378          * subclasses may reorganize the form.
2379          * Note that you do not need to worry about the label's for=, it will be
2380          * inferred by the id given to the input. You can remove them both by
2381          * passing array( 'id' => false ) to $userInputAttrs.
2382          *
2383          * @param $summary string The value of the summary input
2384          * @param $labelText string The html to place inside the label
2385          * @param $inputAttrs array of attrs to use on the input
2386          * @param $spanLabelAttrs array of attrs to use on the span inside the label
2387          *
2388          * @return array An array in the format array( $label, $input )
2389          */
2390         function getSummaryInput( $summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null ) {
2391                 // Note: the maxlength is overriden in JS to 255 and to make it use UTF-8 bytes, not characters.
2392                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2393                         'id' => 'wpSummary',
2394                         'maxlength' => '200',
2395                         'tabindex' => '1',
2396                         'size' => 60,
2397                         'spellcheck' => 'true',
2398                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2399
2400                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2401                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2402                         'id' => "wpSummaryLabel"
2403                 );
2404
2405                 $label = null;
2406                 if ( $labelText ) {
2407                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
2408                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2409                 }
2410
2411                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2412
2413                 return array( $label, $input );
2414         }
2415
2416         /**
2417          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2418          *                          up top, or false if this is the comment summary
2419          *                          down below the textarea
2420          * @param $summary String: The text of the summary to display
2421          * @return String
2422          */
2423         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2424                 global $wgOut, $wgContLang;
2425                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2426                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2427                 if ( $isSubjectPreview ) {
2428                         if ( $this->nosummary ) {
2429                                 return;
2430                         }
2431                 } else {
2432                         if ( !$this->mShowSummaryField ) {
2433                                 return;
2434                         }
2435                 }
2436                 $summary = $wgContLang->recodeForEdit( $summary );
2437                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2438                 list( $label, $input ) = $this->getSummaryInput( $summary, $labelText, array( 'class' => $summaryClass ), array() );
2439                 $wgOut->addHTML( "{$label} {$input}" );
2440         }
2441
2442         /**
2443          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2444          *                          up top, or false if this is the comment summary
2445          *                          down below the textarea
2446          * @param $summary String: the text of the summary to display
2447          * @return String
2448          */
2449         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2450                 // avoid spaces in preview, gets always trimmed on save
2451                 $summary = trim( $summary );
2452                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
2453                         return "";
2454                 }
2455
2456                 global $wgParser;
2457
2458                 if ( $isSubjectPreview ) {
2459                         $summary = wfMessage( 'newsectionsummary', $wgParser->stripSectionName( $summary ) )
2460                                 ->inContentLanguage()->text();
2461                 }
2462
2463                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2464
2465                 $summary = wfMessage( $message )->parse() . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2466                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2467         }
2468
2469         protected function showFormBeforeText() {
2470                 global $wgOut;
2471                 $section = htmlspecialchars( $this->section );
2472                 $wgOut->addHTML( <<<HTML
2473 <input type='hidden' value="{$section}" name="wpSection" />
2474 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2475 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2476 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2477
2478 HTML
2479                 );
2480                 if ( !$this->checkUnicodeCompliantBrowser() ) {
2481                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2482                 }
2483         }
2484
2485         protected function showFormAfterText() {
2486                 global $wgOut, $wgUser;
2487                 /**
2488                  * To make it harder for someone to slip a user a page
2489                  * which submits an edit form to the wiki without their
2490                  * knowledge, a random token is associated with the login
2491                  * session. If it's not passed back with the submission,
2492                  * we won't save the page, or render user JavaScript and
2493                  * CSS previews.
2494                  *
2495                  * For anon editors, who may not have a session, we just
2496                  * include the constant suffix to prevent editing from
2497                  * broken text-mangling proxies.
2498                  */
2499                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2500         }
2501
2502         /**
2503          * Subpage overridable method for printing the form for page content editing
2504          * By default this simply outputs wpTextbox1
2505          * Subclasses can override this to provide a custom UI for editing;
2506          * be it a form, or simply wpTextbox1 with a modified content that will be
2507          * reverse modified when extracted from the post data.
2508          * Note that this is basically the inverse for importContentFormData
2509          */
2510         protected function showContentForm() {
2511                 $this->showTextbox1();
2512         }
2513
2514         /**
2515          * Method to output wpTextbox1
2516          * The $textoverride method can be used by subclasses overriding showContentForm
2517          * to pass back to this method.
2518          *
2519          * @param $customAttribs array of html attributes to use in the textarea
2520          * @param $textoverride String: optional text to override $this->textarea1 with
2521          */
2522         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2523                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2524                         $attribs = array( 'style' => 'display:none;' );
2525                 } else {
2526                         $classes = array(); // Textarea CSS
2527                         if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2528                                 # Is the title semi-protected?
2529                                 if ( $this->mTitle->isSemiProtected() ) {
2530                                         $classes[] = 'mw-textarea-sprotected';
2531                                 } else {
2532                                         # Then it must be protected based on static groups (regular)
2533                                         $classes[] = 'mw-textarea-protected';
2534                                 }
2535                                 # Is the title cascade-protected?
2536                                 if ( $this->mTitle->isCascadeProtected() ) {
2537                                         $classes[] = 'mw-textarea-cprotected';
2538                                 }
2539                         }
2540
2541                         $attribs = array( 'tabindex' => 1 );
2542
2543                         if ( is_array( $customAttribs ) ) {
2544                                 $attribs += $customAttribs;
2545                         }
2546
2547                         if ( count( $classes ) ) {
2548                                 if ( isset( $attribs['class'] ) ) {
2549                                         $classes[] = $attribs['class'];
2550                                 }
2551                                 $attribs['class'] = implode( ' ', $classes );
2552                         }
2553                 }
2554
2555                 $this->showTextbox( $textoverride !== null ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
2556         }
2557
2558         protected function showTextbox2() {
2559                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2560         }
2561
2562         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2563                 global $wgOut, $wgUser;
2564
2565                 $wikitext = $this->safeUnicodeOutput( $text );
2566                 if ( strval( $wikitext ) !== '' ) {
2567                         // Ensure there's a newline at the end, otherwise adding lines
2568                         // is awkward.
2569                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2570                         // mode will show an extra newline. A bit annoying.
2571                         $wikitext .= "\n";
2572                 }
2573
2574                 $attribs = $customAttribs + array(
2575                         'accesskey' => ',',
2576                         'id'   => $name,
2577                         'cols' => $wgUser->getIntOption( 'cols' ),
2578                         'rows' => $wgUser->getIntOption( 'rows' ),
2579                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
2580                 );
2581
2582                 $pageLang = $this->mTitle->getPageLanguage();
2583                 $attribs['lang'] = $pageLang->getCode();
2584                 $attribs['dir'] = $pageLang->getDir();
2585
2586                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2587         }
2588
2589         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2590                 global $wgOut;
2591                 $classes = array();
2592                 if ( $isOnTop ) {
2593                         $classes[] = 'ontop';
2594                 }
2595
2596                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2597
2598                 if ( $this->formtype != 'preview' ) {
2599                         $attribs['style'] = 'display: none;';
2600                 }
2601
2602                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2603
2604                 if ( $this->formtype == 'preview' ) {
2605                         $this->showPreview( $previewOutput );
2606                 }
2607
2608                 $wgOut->addHTML( '</div>' );
2609
2610                 if ( $this->formtype == 'diff' ) {
2611                         try {
2612                                 $this->showDiff();
2613                         } catch ( MWContentSerializationException $ex ) {
2614                                 $msg = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
2615                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2616                         }
2617                 }
2618         }
2619
2620         /**
2621          * Append preview output to $wgOut.
2622          * Includes category rendering if this is a category page.
2623          *
2624          * @param $text String: the HTML to be output for the preview.
2625          */
2626         protected function showPreview( $text ) {
2627                 global $wgOut;
2628                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2629                         $this->mArticle->openShowCategory();
2630                 }
2631                 # This hook seems slightly odd here, but makes things more
2632                 # consistent for extensions.
2633                 wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
2634                 $wgOut->addHTML( $text );
2635                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2636                         $this->mArticle->closeShowCategory();
2637                 }
2638         }
2639
2640         /**
2641          * Get a diff between the current contents of the edit box and the
2642          * version of the page we're editing from.
2643          *
2644          * If this is a section edit, we'll replace the section as for final
2645          * save and then make a comparison.
2646          */
2647         function showDiff() {
2648                 global $wgUser, $wgContLang, $wgOut;
2649
2650                 $oldtitlemsg = 'currentrev';
2651                 # if message does not exist, show diff against the preloaded default
2652                 if( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
2653                         $oldtext = $this->mTitle->getDefaultMessageText();
2654                         if( $oldtext !== false ) {
2655                                 $oldtitlemsg = 'defaultmessagetext';
2656                                 $oldContent = $this->toEditContent( $oldtext );
2657                         } else {
2658                                 $oldContent = null;
2659                         }
2660                 } else {
2661                         $oldContent = $this->getCurrentContent();
2662                 }
2663
2664                 $textboxContent = $this->toEditContent( $this->textbox1 );
2665
2666                 $newContent = $this->mArticle->replaceSectionContent(
2667                                                         $this->section, $textboxContent,
2668                                                         $this->summary, $this->edittime );
2669
2670                 if ( $newContent ) {
2671                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
2672                         wfRunHooks( 'EditPageGetDiffContent', array( $this, &$newContent ) );
2673
2674                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
2675                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
2676                 }
2677
2678                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
2679                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
2680                         $newtitle = wfMessage( 'yourtext' )->parse();
2681
2682                         if ( !$oldContent ) {
2683                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
2684                         }
2685
2686                         if ( !$newContent ) {
2687                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
2688                         }
2689
2690                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
2691                         $de->setContent( $oldContent, $newContent );
2692
2693                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2694                         $de->showDiffStyle();
2695                 } else {
2696                         $difftext = '';
2697                 }
2698
2699                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2700         }
2701
2702         /**
2703          * Show the header copyright warning.
2704          */
2705         protected function showHeaderCopyrightWarning() {
2706                 $msg = 'editpage-head-copy-warn';
2707                 if ( !wfMessage( $msg )->isDisabled() ) {
2708                         global $wgOut;
2709                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
2710                                 'editpage-head-copy-warn' );
2711                 }
2712         }
2713
2714         /**
2715          * Give a chance for site and per-namespace customizations of
2716          * terms of service summary link that might exist separately
2717          * from the copyright notice.
2718          *
2719          * This will display between the save button and the edit tools,
2720          * so should remain short!
2721          */
2722         protected function showTosSummary() {
2723                 $msg = 'editpage-tos-summary';
2724                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
2725                 if ( !wfMessage( $msg )->isDisabled() ) {
2726                         global $wgOut;
2727                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
2728                         $wgOut->addWikiMsg( $msg );
2729                         $wgOut->addHTML( '</div>' );
2730                 }
2731         }
2732
2733         protected function showEditTools() {
2734                 global $wgOut;
2735                 $wgOut->addHTML( '<div class="mw-editTools">' .
2736                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
2737                         '</div>' );
2738         }
2739
2740         /**
2741          * Get the copyright warning
2742          *
2743          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
2744          */
2745         protected function getCopywarn() {
2746                 return self::getCopyrightWarning( $this->mTitle );
2747         }
2748
2749         public static function getCopyrightWarning( $title ) {
2750                 global $wgRightsText;
2751                 if ( $wgRightsText ) {
2752                         $copywarnMsg = array( 'copyrightwarning',
2753                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
2754                                 $wgRightsText );
2755                 } else {
2756                         $copywarnMsg = array( 'copyrightwarning2',
2757                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
2758                 }
2759                 // Allow for site and per-namespace customization of contribution/copyright notice.
2760                 wfRunHooks( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
2761
2762                 return "<div id=\"editpage-copywarn\">\n" .
2763                         call_user_func_array( 'wfMessage', $copywarnMsg )->plain() . "\n</div>";
2764         }
2765
2766         protected function showStandardInputs( &$tabindex = 2 ) {
2767                 global $wgOut;
2768                 $wgOut->addHTML( "<div class='editOptions'>\n" );
2769
2770                 if ( $this->section != 'new' ) {
2771                         $this->showSummaryInput( false, $this->summary );
2772                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
2773                 }
2774
2775                 $checkboxes = $this->getCheckboxes( $tabindex,
2776                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
2777                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
2778
2779                 // Show copyright warning.
2780                 $wgOut->addWikiText( $this->getCopywarn() );
2781                 $wgOut->addHTML( $this->editFormTextAfterWarn );
2782
2783                 $wgOut->addHTML( "<div class='editButtons'>\n" );
2784                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
2785
2786                 $cancel = $this->getCancelLink();
2787                 if ( $cancel !== '' ) {
2788                         $cancel .= wfMessage( 'pipe-separator' )->text();
2789                 }
2790                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMessage( 'edithelppage' )->inContentLanguage()->text() );
2791                 $edithelp = '<a target="helpwindow" href="' . $edithelpurl . '">' .
2792                         wfMessage( 'edithelp' )->escaped() . '</a> ' .
2793                         wfMessage( 'newwindow' )->parse();
2794                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
2795                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
2796                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
2797                 wfRunHooks( 'EditPage::showStandardInputs:options', array( $this, $wgOut, &$tabindex ) );
2798                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
2799         }
2800
2801         /**
2802          * Show an edit conflict. textbox1 is already shown in showEditForm().
2803          * If you want to use another entry point to this function, be careful.
2804          */
2805         protected function showConflict() {
2806                 global $wgOut;
2807
2808                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
2809                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2810
2811                         $content1 = $this->toEditContent( $this->textbox1 );
2812                         $content2 = $this->toEditContent( $this->textbox2 );
2813
2814                         $handler = ContentHandler::getForModelID( $this->contentModel );
2815                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
2816                         $de->setContent( $content2, $content1 );
2817                         $de->showDiff(
2818                                 wfMessage( 'yourtext' )->parse(),
2819                                 wfMessage( 'storedversion' )->text()
2820                         );
2821
2822                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2823                         $this->showTextbox2();
2824                 }
2825         }
2826
2827         /**
2828          * @return string
2829          */
2830         public function getCancelLink() {
2831                 $cancelParams = array();
2832                 if ( !$this->isConflict && $this->oldid > 0 ) {
2833                         $cancelParams['oldid'] = $this->oldid;
2834                 }
2835
2836                 return Linker::linkKnown(
2837                         $this->getContextTitle(),
2838                         wfMessage( 'cancel' )->parse(),
2839                         array( 'id' => 'mw-editform-cancel' ),
2840                         $cancelParams
2841                 );
2842         }
2843
2844         /**
2845          * Returns the URL to use in the form's action attribute.
2846          * This is used by EditPage subclasses when simply customizing the action
2847          * variable in the constructor is not enough. This can be used when the
2848          * EditPage lives inside of a Special page rather than a custom page action.
2849          *
2850          * @param $title Title object for which is being edited (where we go to for &action= links)
2851          * @return string
2852          */
2853         protected function getActionURL( Title $title ) {
2854                 return $title->getLocalURL( array( 'action' => $this->action ) );
2855         }
2856
2857         /**
2858          * Check if a page was deleted while the user was editing it, before submit.
2859          * Note that we rely on the logging table, which hasn't been always there,
2860          * but that doesn't matter, because this only applies to brand new
2861          * deletes.
2862          */
2863         protected function wasDeletedSinceLastEdit() {
2864                 if ( $this->deletedSinceEdit !== null ) {
2865                         return $this->deletedSinceEdit;
2866                 }
2867
2868                 $this->deletedSinceEdit = false;
2869
2870                 if ( $this->mTitle->isDeletedQuick() ) {
2871                         $this->lastDelete = $this->getLastDelete();
2872                         if ( $this->lastDelete ) {
2873                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
2874                                 if ( $deleteTime > $this->starttime ) {
2875                                         $this->deletedSinceEdit = true;
2876                                 }
2877                         }
2878                 }
2879
2880                 return $this->deletedSinceEdit;
2881         }
2882
2883         protected function getLastDelete() {
2884                 $dbr = wfGetDB( DB_SLAVE );
2885                 $data = $dbr->selectRow(
2886                         array( 'logging', 'user' ),
2887                         array(
2888                                 'log_type',
2889                                 'log_action',
2890                                 'log_timestamp',
2891                                 'log_user',
2892                                 'log_namespace',
2893                                 'log_title',
2894                                 'log_comment',
2895                                 'log_params',
2896                                 'log_deleted',
2897                                 'user_name'
2898                         ), array(
2899                                 'log_namespace' => $this->mTitle->getNamespace(),
2900                                 'log_title' => $this->mTitle->getDBkey(),
2901                                 'log_type' => 'delete',
2902                                 'log_action' => 'delete',
2903                                 'user_id=log_user'
2904                         ),
2905                         __METHOD__,
2906                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
2907                 );
2908                 // Quick paranoid permission checks...
2909                 if ( is_object( $data ) ) {
2910                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
2911                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
2912                         }
2913
2914                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
2915                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
2916                         }
2917                 }
2918                 return $data;
2919         }
2920
2921         /**
2922          * Get the rendered text for previewing.
2923          * @throws MWException
2924          * @return string
2925          */
2926         function getPreviewText() {
2927                 global $wgOut, $wgUser, $wgRawHtml, $wgLang;
2928
2929                 wfProfileIn( __METHOD__ );
2930
2931                 if ( $wgRawHtml && !$this->mTokenOk ) {
2932                         // Could be an offsite preview attempt. This is very unsafe if
2933                         // HTML is enabled, as it could be an attack.
2934                         $parsedNote = '';
2935                         if ( $this->textbox1 !== '' ) {
2936                                 // Do not put big scary notice, if previewing the empty
2937                                 // string, which happens when you initially edit
2938                                 // a category page, due to automatic preview-on-open.
2939                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
2940                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
2941                         }
2942                         wfProfileOut( __METHOD__ );
2943                         return $parsedNote;
2944                 }
2945
2946                 $note = '';
2947
2948                 try {
2949                         $content = $this->toEditContent( $this->textbox1 );
2950
2951                         $previewHTML = '';
2952                         if ( !wfRunHooks( 'AlternateEditPreview', array( $this, &$content, &$previewHTML, &$this->mParserOutput ) ) ) {
2953                                 wfProfileOut( __METHOD__ );
2954                                 return $previewHTML;
2955                         }
2956
2957                         if ( $this->mTriedSave && !$this->mTokenOk ) {
2958                                 if ( $this->mTokenOkExceptSuffix ) {
2959                                         $note = wfMessage( 'token_suffix_mismatch' )->plain();
2960
2961                                 } else {
2962                                         $note = wfMessage( 'session_fail_preview' )->plain();
2963                                 }
2964                         } elseif ( $this->incompleteForm ) {
2965                                 $note = wfMessage( 'edit_form_incomplete' )->plain();
2966                         } else {
2967                                 $note = wfMessage( 'previewnote' )->plain() .
2968                                         ' [[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' . wfMessage( 'continue-editing' )->text() . ']]';
2969                         }
2970
2971                         $parserOptions = $this->mArticle->makeParserOptions( $this->mArticle->getContext() );
2972                         $parserOptions->setEditSection( false );
2973                         $parserOptions->setIsPreview( true );
2974                         $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
2975
2976                         # don't parse non-wikitext pages, show message about preview
2977                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
2978                                 if( $this->mTitle->isCssJsSubpage() ) {
2979                                         $level = 'user';
2980                                 } elseif( $this->mTitle->isCssOrJsPage() ) {
2981                                         $level = 'site';
2982                                 } else {
2983                                         $level = false;
2984                                 }
2985
2986                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
2987                                         $format = 'css';
2988                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
2989                                         $format = 'js';
2990                                 } else {
2991                                         $format = false;
2992                                 }
2993
2994                                 # Used messages to make sure grep find them:
2995                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
2996                                 if( $level && $format ) {
2997                                         $note = "<div id='mw-{$level}{$format}preview'>" . wfMessage( "{$level}{$format}preview" )->text() . "</div>";
2998                                 }
2999                         }
3000
3001                         $rt = $content->getRedirectChain();
3002                         if ( $rt ) {
3003                                 $previewHTML = $this->mArticle->viewRedirect( $rt, false );
3004                         } else {
3005
3006                                 # If we're adding a comment, we need to show the
3007                                 # summary as the headline
3008                                 if ( $this->section === "new" && $this->summary !== "" ) {
3009                                         $content = $content->addSectionHeader( $this->summary );
3010                                 }
3011
3012                                 $hook_args = array( $this, &$content );
3013                                 ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
3014                                 wfRunHooks( 'EditPageGetPreviewContent', $hook_args );
3015
3016                                 $parserOptions->enableLimitReport();
3017
3018                                 # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
3019                                 # But it's now deprecated, so never mind
3020
3021                                 $content = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3022                                 $parserOutput = $content->getParserOutput( $this->getArticle()->getTitle(), null, $parserOptions );
3023
3024                                 $previewHTML = $parserOutput->getText();
3025                                 $this->mParserOutput = $parserOutput;
3026                                 $wgOut->addParserOutputNoText( $parserOutput );
3027
3028                                 if ( count( $parserOutput->getWarnings() ) ) {
3029                                         $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3030                                 }
3031                         }
3032                 } catch ( MWContentSerializationException $ex ) {
3033                         $m = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
3034                         $note .= "\n\n" . $m->parse();
3035                         $previewHTML = '';
3036                 }
3037
3038                 if ( $this->isConflict ) {
3039                         $conflict = '<h2 id="mw-previewconflict">' . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
3040                 } else {
3041                         $conflict = '<hr />';
3042                 }
3043
3044                 $previewhead = "<div class='previewnote'>\n" .
3045                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
3046                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3047
3048                 $pageLang = $this->mTitle->getPageLanguage();
3049                 $attribs = array( 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
3050                         'class' => 'mw-content-' . $pageLang->getDir() );
3051                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3052
3053                 wfProfileOut( __METHOD__ );
3054                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3055         }
3056
3057         /**
3058          * @return Array
3059          */
3060         function getTemplates() {
3061                 if ( $this->preview || $this->section != '' ) {
3062                         $templates = array();
3063                         if ( !isset( $this->mParserOutput ) ) {
3064                                 return $templates;
3065                         }
3066                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3067                                 foreach ( array_keys( $template ) as $dbk ) {
3068                                         $templates[] = Title::makeTitle( $ns, $dbk );
3069                                 }
3070                         }
3071                         return $templates;
3072                 } else {
3073                         return $this->mTitle->getTemplateLinksFrom();
3074                 }
3075         }
3076
3077         /**
3078          * Shows a bulletin board style toolbar for common editing functions.
3079          * It can be disabled in the user preferences.
3080          * The necessary JavaScript code can be found in skins/common/edit.js.
3081          *
3082          * @return string
3083          */
3084         static function getEditToolbar() {
3085                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
3086                 global $wgUseTeX, $wgEnableUploads, $wgForeignFileRepos;
3087
3088                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3089
3090                 /**
3091                  * $toolarray is an array of arrays each of which includes the
3092                  * filename of the button image (without path), the opening
3093                  * tag, the closing tag, optionally a sample text that is
3094                  * inserted between the two when no selection is highlighted
3095                  * and.  The tip text is shown when the user moves the mouse
3096                  * over the button.
3097                  *
3098                  * Also here: accesskeys (key), which are not used yet until
3099                  * someone can figure out a way to make them work in
3100                  * IE. However, we should make sure these keys are not defined
3101                  * on the edit page.
3102                  */
3103                 $toolarray = array(
3104                         array(
3105                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
3106                                 'id'     => 'mw-editbutton-bold',
3107                                 'open'   => '\'\'\'',
3108                                 'close'  => '\'\'\'',
3109                                 'sample' => wfMessage( 'bold_sample' )->text(),
3110                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3111                                 'key'    => 'B'
3112                         ),
3113                         array(
3114                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
3115                                 'id'     => 'mw-editbutton-italic',
3116                                 'open'   => '\'\'',
3117                                 'close'  => '\'\'',
3118                                 'sample' => wfMessage( 'italic_sample' )->text(),
3119                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3120                                 'key'    => 'I'
3121                         ),
3122                         array(
3123                                 'image'  => $wgLang->getImageFile( 'button-link' ),
3124                                 'id'     => 'mw-editbutton-link',
3125                                 'open'   => '[[',
3126                                 'close'  => ']]',
3127                                 'sample' => wfMessage( 'link_sample' )->text(),
3128                                 'tip'    => wfMessage( 'link_tip' )->text(),
3129                                 'key'    => 'L'
3130                         ),
3131                         array(
3132                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
3133                                 'id'     => 'mw-editbutton-extlink',
3134                                 'open'   => '[',
3135                                 'close'  => ']',
3136                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3137                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3138                                 'key'    => 'X'
3139                         ),
3140                         array(
3141                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
3142                                 'id'     => 'mw-editbutton-headline',
3143                                 'open'   => "\n== ",
3144                                 'close'  => " ==\n",
3145                                 'sample' => wfMessage( 'headline_sample' )->text(),
3146                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3147                                 'key'    => 'H'
3148                         ),
3149                         $imagesAvailable ? array(
3150                                 'image'  => $wgLang->getImageFile( 'button-image' ),
3151                                 'id'     => 'mw-editbutton-image',
3152                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3153                                 'close'  => ']]',
3154                                 'sample' => wfMessage( 'image_sample' )->text(),
3155                                 'tip'    => wfMessage( 'image_tip' )->text(),
3156                                 'key'    => 'D',
3157                         ) : false,
3158                         $imagesAvailable ? array(
3159                                 'image'  => $wgLang->getImageFile( 'button-media' ),
3160                                 'id'     => 'mw-editbutton-media',
3161                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3162                                 'close'  => ']]',
3163                                 'sample' => wfMessage( 'media_sample' )->text(),
3164                                 'tip'    => wfMessage( 'media_tip' )->text(),
3165                                 'key'    => 'M'
3166                         ) : false,
3167                         $wgUseTeX ? array(
3168                                 'image'  => $wgLang->getImageFile( 'button-math' ),
3169                                 'id'     => 'mw-editbutton-math',
3170                                 'open'   => "<math>",
3171                                 'close'  => "</math>",
3172                                 'sample' => wfMessage( 'math_sample' )->text(),
3173                                 'tip'    => wfMessage( 'math_tip' )->text(),
3174                                 'key'    => 'C'
3175                         ) : false,
3176                         array(
3177                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
3178                                 'id'     => 'mw-editbutton-nowiki',
3179                                 'open'   => "<nowiki>",
3180                                 'close'  => "</nowiki>",
3181                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3182                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3183                                 'key'    => 'N'
3184                         ),
3185                         array(
3186                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
3187                                 'id'     => 'mw-editbutton-signature',
3188                                 'open'   => '--~~~~',
3189                                 'close'  => '',
3190                                 'sample' => '',
3191                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3192                                 'key'    => 'Y'
3193                         ),
3194                         array(
3195                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
3196                                 'id'     => 'mw-editbutton-hr',
3197                                 'open'   => "\n----\n",
3198                                 'close'  => '',
3199                                 'sample' => '',
3200                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3201                                 'key'    => 'R'
3202                         )
3203                 );
3204
3205                 $script = 'mw.loader.using("mediawiki.action.edit", function() {';
3206                 foreach ( $toolarray as $tool ) {
3207                         if ( !$tool ) {
3208                                 continue;
3209                         }
3210
3211                         $params = array(
3212                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
3213                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3214                                 // Older browsers show a "speedtip" type message only for ALT.
3215                                 // Ideally these should be different, realistically they
3216                                 // probably don't need to be.
3217                                 $tip = $tool['tip'],
3218                                 $open = $tool['open'],
3219                                 $close = $tool['close'],
3220                                 $sample = $tool['sample'],
3221                                 $cssId = $tool['id'],
3222                         );
3223
3224                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
3225                 }
3226
3227                 // This used to be called on DOMReady from mediawiki.action.edit, which
3228                 // ended up causing race conditions with the setup code above.
3229                 $script .= "\n" .
3230                         "// Create button bar\n" .
3231                         "$(function() { mw.toolbar.init(); } );\n";
3232
3233                 $script .= '});';
3234                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3235
3236                 $toolbar = '<div id="toolbar"></div>';
3237
3238                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3239
3240                 return $toolbar;
3241         }
3242
3243         /**
3244          * Returns an array of html code of the following checkboxes:
3245          * minor and watch
3246          *
3247          * @param $tabindex int Current tabindex
3248          * @param $checked Array of checkbox => bool, where bool indicates the checked
3249          *                 status of the checkbox
3250          *
3251          * @return array
3252          */
3253         public function getCheckboxes( &$tabindex, $checked ) {
3254                 global $wgUser;
3255
3256                 $checkboxes = array();
3257
3258                 // don't show the minor edit checkbox if it's a new page or section
3259                 if ( !$this->isNew ) {
3260                         $checkboxes['minor'] = '';
3261                         $minorLabel = wfMessage( 'minoredit' )->parse();
3262                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3263                                 $attribs = array(
3264                                         'tabindex'  => ++$tabindex,
3265                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3266                                         'id'        => 'wpMinoredit',
3267                                 );
3268                                 $checkboxes['minor'] =
3269                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3270                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3271                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3272                                         ">{$minorLabel}</label>";
3273                         }
3274                 }
3275
3276                 $watchLabel = wfMessage( 'watchthis' )->parse();
3277                 $checkboxes['watch'] = '';
3278                 if ( $wgUser->isLoggedIn() ) {
3279                         $attribs = array(
3280                                 'tabindex'  => ++$tabindex,
3281                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3282                                 'id'        => 'wpWatchthis',
3283                         );
3284                         $checkboxes['watch'] =
3285                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3286                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3287                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3288                                 ">{$watchLabel}</label>";
3289                 }
3290                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3291                 return $checkboxes;
3292         }
3293
3294         /**
3295          * Returns an array of html code of the following buttons:
3296          * save, diff, preview and live
3297          *
3298          * @param $tabindex int Current tabindex
3299          *
3300          * @return array
3301          */
3302         public function getEditButtons( &$tabindex ) {
3303                 $buttons = array();
3304
3305                 $temp = array(
3306                         'id'        => 'wpSave',
3307                         'name'      => 'wpSave',
3308                         'type'      => 'submit',
3309                         'tabindex'  => ++$tabindex,
3310                         'value'     => wfMessage( 'savearticle' )->text(),
3311                         'accesskey' => wfMessage( 'accesskey-save' )->text(),
3312                         'title'     => wfMessage( 'tooltip-save' )->text() . ' [' . wfMessage( 'accesskey-save' )->text() . ']',
3313                 );
3314                 $buttons['save'] = Xml::element( 'input', $temp, '' );
3315
3316                 ++$tabindex; // use the same for preview and live preview
3317                 $temp = array(
3318                         'id'        => 'wpPreview',
3319                         'name'      => 'wpPreview',
3320                         'type'      => 'submit',
3321                         'tabindex'  => $tabindex,
3322                         'value'     => wfMessage( 'showpreview' )->text(),
3323                         'accesskey' => wfMessage( 'accesskey-preview' )->text(),
3324                         'title'     => wfMessage( 'tooltip-preview' )->text() . ' [' . wfMessage( 'accesskey-preview' )->text() . ']',
3325                 );
3326                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
3327                 $buttons['live'] = '';
3328
3329                 $temp = array(
3330                         'id'        => 'wpDiff',
3331                         'name'      => 'wpDiff',
3332                         'type'      => 'submit',
3333                         'tabindex'  => ++$tabindex,
3334                         'value'     => wfMessage( 'showdiff' )->text(),
3335                         'accesskey' => wfMessage( 'accesskey-diff' )->text(),
3336                         'title'     => wfMessage( 'tooltip-diff' )->text() . ' [' . wfMessage( 'accesskey-diff' )->text() . ']',
3337                 );
3338                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
3339
3340                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3341                 return $buttons;
3342         }
3343
3344         /**
3345          * Output preview text only. This can be sucked into the edit page
3346          * via JavaScript, and saves the server time rendering the skin as
3347          * well as theoretically being more robust on the client (doesn't
3348          * disturb the edit box's undo history, won't eat your text on
3349          * failure, etc).
3350          *
3351          * @todo This doesn't include category or interlanguage links.
3352          *       Would need to enhance it a bit, "<s>maybe wrap them in XML
3353          *       or something...</s>" that might also require more skin
3354          *       initialization, so check whether that's a problem.
3355          */
3356         function livePreview() {
3357                 global $wgOut;
3358                 $wgOut->disable();
3359                 header( 'Content-type: text/xml; charset=utf-8' );
3360                 header( 'Cache-control: no-cache' );
3361
3362                 $previewText = $this->getPreviewText();
3363                 #$categories = $skin->getCategoryLinks();
3364
3365                 $s =
3366                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3367                 Xml::tags( 'livepreview', null,
3368                         Xml::element( 'preview', null, $previewText )
3369                         #.      Xml::element( 'category', null, $categories )
3370                 );
3371                 echo $s;
3372         }
3373
3374         /**
3375          * Call the stock "user is blocked" page
3376          *
3377          * @deprecated in 1.19; throw an exception directly instead
3378          */
3379         function blockedPage() {
3380                 wfDeprecated( __METHOD__, '1.19' );
3381                 global $wgUser;
3382
3383                 throw new UserBlockedError( $wgUser->getBlock() );
3384         }
3385
3386         /**
3387          * Produce the stock "please login to edit pages" page
3388          *
3389          * @deprecated in 1.19; throw an exception directly instead
3390          */
3391         function userNotLoggedInPage() {
3392                 wfDeprecated( __METHOD__, '1.19' );
3393                 throw new PermissionsError( 'edit' );
3394         }
3395
3396         /**
3397          * Show an error page saying to the user that he has insufficient permissions
3398          * to create a new page
3399          *
3400          * @deprecated in 1.19; throw an exception directly instead
3401          */
3402         function noCreatePermission() {
3403                 wfDeprecated( __METHOD__, '1.19' );
3404                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
3405                 throw new PermissionsError( $permission );
3406         }
3407
3408         /**
3409          * Creates a basic error page which informs the user that
3410          * they have attempted to edit a nonexistent section.
3411          */
3412         function noSuchSectionPage() {
3413                 global $wgOut;
3414
3415                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3416
3417                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
3418                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
3419                 $wgOut->addHTML( $res );
3420
3421                 $wgOut->returnToMain( false, $this->mTitle );
3422         }
3423
3424         /**
3425          * Produce the stock "your edit contains spam" page
3426          *
3427          * @param $match string|bool Text which triggered one or more filters
3428          * @deprecated since 1.17 Use method spamPageWithContent() instead
3429          */
3430         static function spamPage( $match = false ) {
3431                 wfDeprecated( __METHOD__, '1.17' );
3432
3433                 global $wgOut, $wgTitle;
3434
3435                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3436
3437                 $wgOut->addHTML( '<div id="spamprotected">' );
3438                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3439                 if ( $match ) {
3440                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3441                 }
3442                 $wgOut->addHTML( '</div>' );
3443
3444                 $wgOut->returnToMain( false, $wgTitle );
3445         }
3446
3447         /**
3448          * Show "your edit contains spam" page with your diff and text
3449          *
3450          * @param $match string|Array|bool Text (or array of texts) which triggered one or more filters
3451          */
3452         public function spamPageWithContent( $match = false ) {
3453                 global $wgOut, $wgLang;
3454                 $this->textbox2 = $this->textbox1;
3455
3456                 if( is_array( $match ) ) {
3457                         $match = $wgLang->listToText( $match );
3458                 }
3459                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3460
3461                 $wgOut->addHTML( '<div id="spamprotected">' );
3462                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3463                 if ( $match ) {
3464                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3465                 }
3466                 $wgOut->addHTML( '</div>' );
3467
3468                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3469                 $this->showDiff();
3470
3471                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3472                 $this->showTextbox2();
3473
3474                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3475         }
3476
3477         /**
3478          * Format an anchor fragment as it would appear for a given section name
3479          * @param $text String
3480          * @return String
3481          * @private
3482          */
3483         function sectionAnchor( $text ) {
3484                 global $wgParser;
3485                 return $wgParser->guessSectionNameFromWikiText( $text );
3486         }
3487
3488         /**
3489          * Check if the browser is on a blacklist of user-agents known to
3490          * mangle UTF-8 data on form submission. Returns true if Unicode
3491          * should make it through, false if it's known to be a problem.
3492          * @return bool
3493          * @private
3494          */
3495         function checkUnicodeCompliantBrowser() {
3496                 global $wgBrowserBlackList, $wgRequest;
3497
3498                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
3499                 if ( $currentbrowser === false ) {
3500                         // No User-Agent header sent? Trust it by default...
3501                         return true;
3502                 }
3503
3504                 foreach ( $wgBrowserBlackList as $browser ) {
3505                         if ( preg_match( $browser, $currentbrowser ) ) {
3506                                 return false;
3507                         }
3508                 }
3509                 return true;
3510         }
3511
3512         /**
3513          * Filter an input field through a Unicode de-armoring process if it
3514          * came from an old browser with known broken Unicode editing issues.
3515          *
3516          * @param $request WebRequest
3517          * @param $field String
3518          * @return String
3519          * @private
3520          */
3521         function safeUnicodeInput( $request, $field ) {
3522                 $text = rtrim( $request->getText( $field ) );
3523                 return $request->getBool( 'safemode' )
3524                         ? $this->unmakesafe( $text )
3525                         : $text;
3526         }
3527
3528         /**
3529          * @param $request WebRequest
3530          * @param $text string
3531          * @return string
3532          */
3533         function safeUnicodeText( $request, $text ) {
3534                 $text = rtrim( $text );
3535                 return $request->getBool( 'safemode' )
3536                         ? $this->unmakesafe( $text )
3537                         : $text;
3538         }
3539
3540         /**
3541          * Filter an output field through a Unicode armoring process if it is
3542          * going to an old browser with known broken Unicode editing issues.
3543          *
3544          * @param $text String
3545          * @return String
3546          * @private
3547          */
3548         function safeUnicodeOutput( $text ) {
3549                 global $wgContLang;
3550                 $codedText = $wgContLang->recodeForEdit( $text );
3551                 return $this->checkUnicodeCompliantBrowser()
3552                         ? $codedText
3553                         : $this->makesafe( $codedText );
3554         }
3555
3556         /**
3557          * A number of web browsers are known to corrupt non-ASCII characters
3558          * in a UTF-8 text editing environment. To protect against this,
3559          * detected browsers will be served an armored version of the text,
3560          * with non-ASCII chars converted to numeric HTML character references.
3561          *
3562          * Preexisting such character references will have a 0 added to them
3563          * to ensure that round-trips do not alter the original data.
3564          *
3565          * @param $invalue String
3566          * @return String
3567          * @private
3568          */
3569         function makesafe( $invalue ) {
3570                 // Armor existing references for reversability.
3571                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
3572
3573                 $bytesleft = 0;
3574                 $result = "";
3575                 $working = 0;
3576                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3577                         $bytevalue = ord( $invalue[$i] );
3578                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
3579                                 $result .= chr( $bytevalue );
3580                                 $bytesleft = 0;
3581                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
3582                                 $working = $working << 6;
3583                                 $working += ( $bytevalue & 0x3F );
3584                                 $bytesleft--;
3585                                 if ( $bytesleft <= 0 ) {
3586                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3587                                 }
3588                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
3589                                 $working = $bytevalue & 0x1F;
3590                                 $bytesleft = 1;
3591                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
3592                                 $working = $bytevalue & 0x0F;
3593                                 $bytesleft = 2;
3594                         } else { // 1111 0xxx
3595                                 $working = $bytevalue & 0x07;
3596                                 $bytesleft = 3;
3597                         }
3598                 }
3599                 return $result;
3600         }
3601
3602         /**
3603          * Reverse the previously applied transliteration of non-ASCII characters
3604          * back to UTF-8. Used to protect data from corruption by broken web browsers
3605          * as listed in $wgBrowserBlackList.
3606          *
3607          * @param $invalue String
3608          * @return String
3609          * @private
3610          */
3611         function unmakesafe( $invalue ) {
3612                 $result = "";
3613                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3614                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
3615                                 $i += 3;
3616                                 $hexstring = "";
3617                                 do {
3618                                         $hexstring .= $invalue[$i];
3619                                         $i++;
3620                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
3621
3622                                 // Do some sanity checks. These aren't needed for reversability,
3623                                 // but should help keep the breakage down if the editor
3624                                 // breaks one of the entities whilst editing.
3625                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) and ( strlen( $hexstring ) <= 6 ) ) {
3626                                         $codepoint = hexdec( $hexstring );
3627                                         $result .= codepointToUtf8( $codepoint );
3628                                 } else {
3629                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
3630                                 }
3631                         } else {
3632                                 $result .= substr( $invalue, $i, 1 );
3633                         }
3634                 }
3635                 // reverse the transform that we made for reversability reasons.
3636                 return strtr( $result, array( "&#x0" => "&#x" ) );
3637         }
3638 }