includes/EditPage.php

   1 <?php
   2 /**
   3  * User interface for page editing.
   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          * Status: Article successfully updated
  41          */
  42         const AS_SUCCESS_UPDATE = 200;
  43
  44         /**
  45          * Status: Article successfully created
  46          */
  47         const AS_SUCCESS_NEW_ARTICLE = 201;
  48
  49         /**
  50          * Status: Article update aborted by a hook function
  51          */
  52         const AS_HOOK_ERROR = 210;
  53
  54         /**
  55          * Status: A hook function returned an error
  56          */
  57         const AS_HOOK_ERROR_EXPECTED = 212;
  58
  59         /**
  60          * Status: User is blocked from editing this page
  61          */
  62         const AS_BLOCKED_PAGE_FOR_USER = 215;
  63
  64         /**
  65          * Status: Content too big (> $wgMaxArticleSize)
  66          */
  67         const AS_CONTENT_TOO_BIG = 216;
  68
  69         /**
  70          * Status: this anonymous user is not allowed to edit this page
  71          */
  72         const AS_READ_ONLY_PAGE_ANON = 218;
  73
  74         /**
  75          * Status: this logged in user is not allowed to edit this page
  76          */
  77         const AS_READ_ONLY_PAGE_LOGGED = 219;
  78
  79         /**
  80          * Status: wiki is in readonly mode (wfReadOnly() == true)
  81          */
  82         const AS_READ_ONLY_PAGE = 220;
  83
  84         /**
  85          * Status: rate limiter for action 'edit' was tripped
  86          */
  87         const AS_RATE_LIMITED = 221;
  88
  89         /**
  90          * Status: article was deleted while editing and param wpRecreate == false or form
  91          * was not posted
  92          */
  93         const AS_ARTICLE_WAS_DELETED = 222;
  94
  95         /**
  96          * Status: user tried to create this page, but is not allowed to do that
  97          * ( Title->userCan('create') == false )
  98          */
  99         const AS_NO_CREATE_PERMISSION = 223;
 100
 101         /**
 102          * Status: user tried to create a blank page
 103          */
 104         const AS_BLANK_ARTICLE = 224;
 105
 106         /**
 107          * Status: (non-resolvable) edit conflict
 108          */
 109         const AS_CONFLICT_DETECTED = 225;
 110
 111         /**
 112          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 113          * editing in his own userspace or talkspace and wpIgnoreBlankSummary == false
 114          */
 115         const AS_SUMMARY_NEEDED = 226;
 116
 117         /**
 118          * Status: user tried to create a new section without content
 119          */
 120         const AS_TEXTBOX_EMPTY = 228;
 121
 122         /**
 123          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 124          */
 125         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 126
 127         /**
 128          * Status: WikiPage::doEdit() was unsuccessful
 129          */
 130         const AS_END = 231;
 131
 132         /**
 133          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 134          */
 135         const AS_SPAM_ERROR = 232;
 136
 137         /**
 138          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 139          */
 140         const AS_IMAGE_REDIRECT_ANON = 233;
 141
 142         /**
 143          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 144          */
 145         const AS_IMAGE_REDIRECT_LOGGED = 234;
 146
 147         /**
 148          * Status: can't parse content
 149          */
 150         const AS_PARSE_ERROR = 240;
 151
 152         /**
 153          * HTML id and name for the beginning of the edit form.
 154          */
 155         const EDITFORM_ID = 'editform';
 156
 157         /**
 158          * Prefix of key for cookie used to pass post-edit state.
 159          * The revision id edited is added after this
 160          */
 161         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 162
 163         /**
 164          * Duration of PostEdit cookie, in seconds.
 165          * The cookie will be removed instantly if the JavaScript runs.
 166          *
 167          * Otherwise, though, we don't want the cookies to accumulate.
 168          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible
 169          * limit of only 20 cookies per domain. This still applies at least to some
 170          * versions of IE without full updates:
 171          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 172          *
 173          * A value of 20 minutes should be enough to take into account slow loads and minor
 174          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 175          */
 176         const POST_EDIT_COOKIE_DURATION = 1200;
 177
 178         /** @var Article */
 179         public $mArticle;
 180
 181         /** @var Title */
 182         public $mTitle;
 183
 184         /** @var null|Title */
 185         private $mContextTitle = null;
 186
 187         /** @var string */
 188         protected $action = 'submit';
 189
 190         /** @var bool */
 191         public $isConflict = false;
 192
 193         /** @var bool */
 194         public $isCssJsSubpage = false;
 195
 196         /** @var bool */
 197         public $isCssSubpage = false;
 198
 199         /** @var bool */
 200         public $isJsSubpage = false;
 201
 202         /** @var bool */
 203         protected $isWrongCaseCssJsPage = false;
 204
 205         /** @var bool New page or new section */
 206         protected $isNew = false;
 207
 208         /** @var bool */
 209         protected $deletedSinceEdit;
 210
 211         /** @var string */
 212         public $formtype;
 213
 214         /** @var bool */
 215         public $firsttime;
 216
 217         /** @var bool|stdClass */
 218         protected $lastDelete;
 219
 220         /** @var bool */
 221         protected $mTokenOk = false;
 222
 223         /** @var bool */
 224         protected $mTokenOkExceptSuffix = false;
 225
 226         /** @var bool */
 227         protected $mTriedSave = false;
 228
 229         /** @var bool */
 230         protected $incompleteForm = false;
 231
 232         /** @var bool */
 233         protected $tooBig = false;
 234
 235         /** @var bool */
 236         protected $kblength = false;
 237
 238         /** @var bool */
 239         protected $missingComment = false;
 240
 241         /** @var bool */
 242         protected $missingSummary = false;
 243
 244         /** @var bool */
 245         protected $allowBlankSummary = false;
 246
 247         /** @var string */
 248         protected $autoSumm = '';
 249
 250         /** @var string */
 251         public $hookError = '';
 252
 253         /** @var ParserOutput */
 254         protected $mParserOutput;
 255
 256         /** @var bool Has a summary been preset using GET parameter &summary= ? */
 257         protected $hasPresetSummary = false;
 258
 259         /** @var bool */
 260         protected $mBaseRevision = false;
 261
 262         /** @var bool */
 263         public $mShowSummaryField = true;
 264
 265         # Form values
 266
 267         /** @var bool */
 268         public $save = false;
 269
 270         /** @var bool */
 271         public $preview = false;
 272
 273         /** @var bool */
 274         protected $diff = false;
 275
 276         /** @var bool */
 277         public $minoredit = false;
 278
 279         /** @var bool */
 280         protected $watchthis = false;
 281
 282         /** @var bool */
 283         protected $recreate = false;
 284
 285         /** @var string */
 286         public $textbox1 = '';
 287
 288         /** @var string */
 289         public $textbox2 = '';
 290
 291         /** @var string */
 292         public $summary = '';
 293
 294         /** @var bool */
 295         protected $nosummary = false;
 296
 297         /** @var string */
 298         public $edittime = '';
 299
 300         /** @var string */
 301         public $section = '';
 302
 303         /** @var string */
 304         public $sectiontitle = '';
 305
 306         /** @var string */
 307         protected $starttime = '';
 308
 309         /** @var int */
 310         public $oldid = 0;
 311
 312         /** @var string */
 313         protected $editintro = '';
 314
 315         /** @var null */
 316         public $scrolltop = null;
 317
 318         /** @var bool */
 319         public $bot = true;
 320
 321         /** @var null|string */
 322         public $contentModel = null;
 323
 324         /** @var null|string */
 325         public $contentFormat = null;
 326
 327         # Placeholders for text injection by hooks (must be HTML)
 328         # extensions should take care to _append_ to the present value
 329
 330         /** @var string Before even the preview */
 331         public $editFormPageTop = '';
 332         public $editFormTextTop = '';
 333         public $editFormTextBeforeContent = '';
 334         public $editFormTextAfterWarn = '';
 335         public $editFormTextAfterTools = '';
 336         public $editFormTextBottom = '';
 337         public $editFormTextAfterContent = '';
 338         public $previewTextAfterContent = '';
 339         public $mPreloadContent = null;
 340
 341         /* $didSave should be set to true whenever an article was successfully altered. */
 342         public $didSave = false;
 343         public $undidRev = 0;
 344
 345         public $suppressIntro = false;
 346
 347         /** @var bool Set to true to allow editing of non-text content types. */
 348         public $allowNonTextContent = false;
 349
 350         /** @var bool */
 351         protected $edit;
 352
 353         /** @var bool */
 354         public $live;
 355
 356         /**
 357          * @param Article $article
 358          */
 359         public function __construct( Article $article ) {
 360                 $this->mArticle = $article;
 361                 $this->mTitle = $article->getTitle();
 362
 363                 $this->contentModel = $this->mTitle->getContentModel();
 364
 365                 $handler = ContentHandler::getForModelID( $this->contentModel );
 366                 $this->contentFormat = $handler->getDefaultFormat();
 367         }
 368
 369         /**
 370          * @return Article
 371          */
 372         public function getArticle() {
 373                 return $this->mArticle;
 374         }
 375
 376         /**
 377          * @since 1.19
 378          * @return Title
 379          */
 380         public function getTitle() {
 381                 return $this->mTitle;
 382         }
 383
 384         /**
 385          * Set the context Title object
 386          *
 387          * @param Title|null $title Title object or null
 388          */
 389         public function setContextTitle( $title ) {
 390                 $this->mContextTitle = $title;
 391         }
 392
 393         /**
 394          * Get the context title object.
 395          * If not set, $wgTitle will be returned. This behavior might change in
 396          * the future to return $this->mTitle instead.
 397          *
 398          * @return Title
 399          */
 400         public function getContextTitle() {
 401                 if ( is_null( $this->mContextTitle ) ) {
 402                         global $wgTitle;
 403                         return $wgTitle;
 404                 } else {
 405                         return $this->mContextTitle;
 406                 }
 407         }
 408
 409         /**
 410          * Returns if the given content model is editable.
 411          *
 412          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 413          * @return bool
 414          * @throws MWException If $modelId has no known handler
 415          */
 416         public function isSupportedContentModel( $modelId ) {
 417                 return $this->allowNonTextContent ||
 418                         ContentHandler::getForModelID( $modelId ) instanceof TextContentHandler;
 419         }
 420
 421         function submit() {
 422                 $this->edit();
 423         }
 424
 425         /**
 426          * This is the function that gets called for "action=edit". It
 427          * sets up various member variables, then passes execution to
 428          * another function, usually showEditForm()
 429          *
 430          * The edit form is self-submitting, so that when things like
 431          * preview and edit conflicts occur, we get the same form back
 432          * with the extra stuff added.  Only when the final submission
 433          * is made and all is well do we actually save and redirect to
 434          * the newly-edited page.
 435          */
 436         function edit() {
 437                 global $wgOut, $wgRequest, $wgUser;
 438                 // Allow extensions to modify/prevent this form or submission
 439                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 440                         return;
 441                 }
 442
 443                 wfProfileIn( __METHOD__ );
 444                 wfDebug( __METHOD__ . ": enter\n" );
 445
 446                 // If they used redlink=1 and the page exists, redirect to the main article
 447                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 448                         $wgOut->redirect( $this->mTitle->getFullURL() );
 449                         wfProfileOut( __METHOD__ );
 450                         return;
 451                 }
 452
 453                 $this->importFormData( $wgRequest );
 454                 $this->firsttime = false;
 455
 456                 if ( $this->live ) {
 457                         $this->livePreview();
 458                         wfProfileOut( __METHOD__ );
 459                         return;
 460                 }
 461
 462                 if ( wfReadOnly() && $this->save ) {
 463                         // Force preview
 464                         $this->save = false;
 465                         $this->preview = true;
 466                 }
 467
 468                 if ( $this->save ) {
 469                         $this->formtype = 'save';
 470                 } elseif ( $this->preview ) {
 471                         $this->formtype = 'preview';
 472                 } elseif ( $this->diff ) {
 473                         $this->formtype = 'diff';
 474                 } else { # First time through
 475                         $this->firsttime = true;
 476                         if ( $this->previewOnOpen() ) {
 477                                 $this->formtype = 'preview';
 478                         } else {
 479                                 $this->formtype = 'initial';
 480                         }
 481                 }
 482
 483                 $permErrors = $this->getEditPermissionErrors();
 484                 if ( $permErrors ) {
 485                         wfDebug( __METHOD__ . ": User can't edit\n" );
 486                         // Auto-block user's IP if the account was "hard" blocked
 487                         $wgUser->spreadAnyEditBlock();
 488
 489                         $this->displayPermissionsError( $permErrors );
 490
 491                         wfProfileOut( __METHOD__ );
 492                         return;
 493                 }
 494
 495                 wfProfileIn( __METHOD__ . "-business-end" );
 496
 497                 $this->isConflict = false;
 498                 // css / js subpages of user pages get a special treatment
 499                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 500                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 501                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 502                 // @todo FIXME: Silly assignment.
 503                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 504
 505                 # Show applicable editing introductions
 506                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 507                         $this->showIntro();
 508                 }
 509
 510                 # Attempt submission here.  This will check for edit conflicts,
 511                 # and redundantly check for locked database, blocked IPs, etc.
 512                 # that edit() already checked just in case someone tries to sneak
 513                 # in the back door with a hand-edited submission URL.
 514
 515                 if ( 'save' == $this->formtype ) {
 516                         if ( !$this->attemptSave() ) {
 517                                 wfProfileOut( __METHOD__ . "-business-end" );
 518                                 wfProfileOut( __METHOD__ );
 519                                 return;
 520                         }
 521                 }
 522
 523                 # First time through: get contents, set time for conflict
 524                 # checking, etc.
 525                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 526                         if ( $this->initialiseForm() === false ) {
 527                                 $this->noSuchSectionPage();
 528                                 wfProfileOut( __METHOD__ . "-business-end" );
 529                                 wfProfileOut( __METHOD__ );
 530                                 return;
 531                         }
 532
 533                         if ( !$this->mTitle->getArticleID() ) {
 534                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 535                         } else {
 536                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 537                         }
 538
 539                 }
 540
 541                 $this->showEditForm();
 542                 wfProfileOut( __METHOD__ . "-business-end" );
 543                 wfProfileOut( __METHOD__ );
 544         }
 545
 546         /**
 547          * @return array
 548          */
 549         protected function getEditPermissionErrors() {
 550                 global $wgUser;
 551                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 552                 # Can this title be created?
 553                 if ( !$this->mTitle->exists() ) {
 554                         $permErrors = array_merge( $permErrors,
 555                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 556                 }
 557                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 558                 $remove = array();
 559                 foreach ( $permErrors as $error ) {
 560                         if ( ( $this->preview || $this->diff )
 561                                 && ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' )
 562                         ) {
 563                                 $remove[] = $error;
 564                         }
 565                 }
 566                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 567                 return $permErrors;
 568         }
 569
 570         /**
 571          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 572          * but with the following differences:
 573          * - If redlink=1, the user will be redirected to the page
 574          * - If there is content to display or the error occurs while either saving,
 575          *   previewing or showing the difference, it will be a
 576          *   "View source for ..." page displaying the source code after the error message.
 577          *
 578          * @since 1.19
 579          * @param array $permErrors Array of permissions errors, as returned by
 580          *    Title::getUserPermissionsErrors().
 581          * @throws PermissionsError
 582          */
 583         protected function displayPermissionsError( array $permErrors ) {
 584                 global $wgRequest, $wgOut;
 585
 586                 if ( $wgRequest->getBool( 'redlink' ) ) {
 587                         // The edit page was reached via a red link.
 588                         // Redirect to the article page and let them click the edit tab if
 589                         // they really want a permission error.
 590                         $wgOut->redirect( $this->mTitle->getFullURL() );
 591                         return;
 592                 }
 593
 594                 $content = $this->getContentObject();
 595
 596                 # Use the normal message if there's nothing to display
 597                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 598                         $action = $this->mTitle->exists() ? 'edit' :
 599                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 600                         throw new PermissionsError( $action, $permErrors );
 601                 }
 602
 603                 wfRunHooks( 'EditPage::showReadOnlyForm:initial', array( $this, &$wgOut ) );
 604
 605                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 606                 $wgOut->setPageTitle( wfMessage(
 607                         'viewsource-title',
 608                         $this->getContextTitle()->getPrefixedText()
 609                 ) );
 610                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 611                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 612                 $wgOut->addHTML( "<hr />\n" );
 613
 614                 # If the user made changes, preserve them when showing the markup
 615                 # (This happens when a user is blocked during edit, for instance)
 616                 if ( !$this->firsttime ) {
 617                         $text = $this->textbox1;
 618                         $wgOut->addWikiMsg( 'viewyourtext' );
 619                 } else {
 620                         $text = $this->toEditText( $content );
 621                         $wgOut->addWikiMsg( 'viewsourcetext' );
 622                 }
 623
 624                 $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 625
 626                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 627                         Linker::formatTemplates( $this->getTemplates() ) ) );
 628
 629                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 630
 631                 if ( $this->mTitle->exists() ) {
 632                         $wgOut->returnToMain( null, $this->mTitle );
 633                 }
 634         }
 635
 636         /**
 637          * Show a read-only error
 638          * Parameters are the same as OutputPage:readOnlyPage()
 639          * Redirect to the article page if redlink=1
 640          * @deprecated since 1.19; use displayPermissionsError() instead
 641          */
 642         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 643                 wfDeprecated( __METHOD__, '1.19' );
 644
 645                 global $wgRequest, $wgOut;
 646                 if ( $wgRequest->getBool( 'redlink' ) ) {
 647                         // The edit page was reached via a red link.
 648                         // Redirect to the article page and let them click the edit tab if
 649                         // they really want a permission error.
 650                         $wgOut->redirect( $this->mTitle->getFullURL() );
 651                 } else {
 652                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 653                 }
 654         }
 655
 656         /**
 657          * Should we show a preview when the edit form is first shown?
 658          *
 659          * @return bool
 660          */
 661         protected function previewOnOpen() {
 662                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 663                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 664                         // Explicit override from request
 665                         return true;
 666                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 667                         // Explicit override from request
 668                         return false;
 669                 } elseif ( $this->section == 'new' ) {
 670                         // Nothing *to* preview for new sections
 671                         return false;
 672                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 673                         && $wgUser->getOption( 'previewonfirst' )
 674                 ) {
 675                         // Standard preference behavior
 676                         return true;
 677                 } elseif ( !$this->mTitle->exists()
 678                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 679                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 680                 ) {
 681                         // Categories are special
 682                         return true;
 683                 } else {
 684                         return false;
 685                 }
 686         }
 687
 688         /**
 689          * Checks whether the user entered a skin name in uppercase,
 690          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 691          *
 692          * @return bool
 693          */
 694         protected function isWrongCaseCssJsPage() {
 695                 if ( $this->mTitle->isCssJsSubpage() ) {
 696                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 697                         $skins = array_merge(
 698                                 array_keys( Skin::getSkinNames() ),
 699                                 array( 'common' )
 700                         );
 701                         return !in_array( $name, $skins )
 702                                 && in_array( strtolower( $name ), $skins );
 703                 } else {
 704                         return false;
 705                 }
 706         }
 707
 708         /**
 709          * Returns whether section editing is supported for the current page.
 710          * Subclasses may override this to replace the default behavior, which is
 711          * to check ContentHandler::supportsSections.
 712          *
 713          * @return bool True if this edit page supports sections, false otherwise.
 714          */
 715         protected function isSectionEditSupported() {
 716                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 717                 return $contentHandler->supportsSections();
 718         }
 719
 720         /**
 721          * This function collects the form data and uses it to populate various member variables.
 722          * @param WebRequest $request
 723          * @throws ErrorPageError
 724          */
 725         function importFormData( &$request ) {
 726                 global $wgContLang, $wgUser;
 727
 728                 wfProfileIn( __METHOD__ );
 729
 730                 # Section edit can come from either the form or a link
 731                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 732
 733                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 734                         wfProfileOut( __METHOD__ );
 735                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 736                 }
 737
 738                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 739
 740                 if ( $request->wasPosted() ) {
 741                         # These fields need to be checked for encoding.
 742                         # Also remove trailing whitespace, but don't remove _initial_
 743                         # whitespace from the text boxes. This may be significant formatting.
 744                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 745                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 746                                 // Skip this if wpTextbox2 has input, it indicates that we came
 747                                 // from a conflict page with raw page text, not a custom form
 748                                 // modified by subclasses
 749                                 wfProfileIn( get_class( $this ) . "::importContentFormData" );
 750                                 $textbox1 = $this->importContentFormData( $request );
 751                                 if ( $textbox1 !== null ) {
 752                                         $this->textbox1 = $textbox1;
 753                                 }
 754
 755                                 wfProfileOut( get_class( $this ) . "::importContentFormData" );
 756                         }
 757
 758                         # Truncate for whole multibyte characters
 759                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 760
 761                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 762                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 763                         # section titles.
 764                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 765
 766                         # Treat sectiontitle the same way as summary.
 767                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 768                         # currently doing double duty as both edit summary and section title. Right now this
 769                         # is just to allow API edits to work around this limitation, but this should be
 770                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 771                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 772                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 773
 774                         $this->edittime = $request->getVal( 'wpEdittime' );
 775                         $this->starttime = $request->getVal( 'wpStarttime' );
 776
 777                         $undidRev = $request->getInt( 'wpUndidRevision' );
 778                         if ( $undidRev ) {
 779                                 $this->undidRev = $undidRev;
 780                         }
 781
 782                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 783
 784                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 785                                 // wpTextbox1 field is missing, possibly due to being "too big"
 786                                 // according to some filter rules such as Suhosin's setting for
 787                                 // suhosin.request.max_value_length (d'oh)
 788                                 $this->incompleteForm = true;
 789                         } else {
 790                                 // If we receive the last parameter of the request, we can fairly
 791                                 // claim the POST request has not been truncated.
 792
 793                                 // TODO: softened the check for cutover.  Once we determine
 794                                 // that it is safe, we should complete the transition by
 795                                 // removing the "edittime" clause.
 796                                 $this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' ) && is_null( $this->edittime ) );
 797                         }
 798                         if ( $this->incompleteForm ) {
 799                                 # If the form is incomplete, force to preview.
 800                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 801                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 802                                 $this->preview = true;
 803                         } else {
 804                                 /* Fallback for live preview */
 805                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 806                                 $this->diff = $request->getCheck( 'wpDiff' );
 807
 808                                 // Remember whether a save was requested, so we can indicate
 809                                 // if we forced preview due to session failure.
 810                                 $this->mTriedSave = !$this->preview;
 811
 812                                 if ( $this->tokenOk( $request ) ) {
 813                                         # Some browsers will not report any submit button
 814                                         # if the user hits enter in the comment box.
 815                                         # The unmarked state will be assumed to be a save,
 816                                         # if the form seems otherwise complete.
 817                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 818                                 } elseif ( $this->diff ) {
 819                                         # Failed token check, but only requested "Show Changes".
 820                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 821                                 } else {
 822                                         # Page might be a hack attempt posted from
 823                                         # an external site. Preview instead of saving.
 824                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 825                                         $this->preview = true;
 826                                 }
 827                         }
 828                         $this->save = !$this->preview && !$this->diff;
 829                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 830                                 $this->edittime = null;
 831                         }
 832
 833                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 834                                 $this->starttime = null;
 835                         }
 836
 837                         $this->recreate = $request->getCheck( 'wpRecreate' );
 838
 839                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 840                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 841
 842                         # Don't force edit summaries when a user is editing their own user or talk page
 843                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 844                                 && $this->mTitle->getText() == $wgUser->getName()
 845                         ) {
 846                                 $this->allowBlankSummary = true;
 847                         } else {
 848                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
 849                                         || !$wgUser->getOption( 'forceeditsummary' );
 850                         }
 851
 852                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 853                 } else {
 854                         # Not a posted form? Start with nothing.
 855                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 856                         $this->textbox1 = '';
 857                         $this->summary = '';
 858                         $this->sectiontitle = '';
 859                         $this->edittime = '';
 860                         $this->starttime = wfTimestampNow();
 861                         $this->edit = false;
 862                         $this->preview = false;
 863                         $this->save = false;
 864                         $this->diff = false;
 865                         $this->minoredit = false;
 866                         // Watch may be overridden by request parameters
 867                         $this->watchthis = $request->getBool( 'watchthis', false );
 868                         $this->recreate = false;
 869
 870                         // When creating a new section, we can preload a section title by passing it as the
 871                         // preloadtitle parameter in the URL (Bug 13100)
 872                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 873                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 874                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 875                                 $this->summary = $request->getVal( 'preloadtitle' );
 876                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 877                                 $this->summary = $request->getText( 'summary' );
 878                                 if ( $this->summary !== '' ) {
 879                                         $this->hasPresetSummary = true;
 880                                 }
 881                         }
 882
 883                         if ( $request->getVal( 'minor' ) ) {
 884                                 $this->minoredit = true;
 885                         }
 886                 }
 887
 888                 $this->oldid = $request->getInt( 'oldid' );
 889
 890                 $this->bot = $request->getBool( 'bot', true );
 891                 $this->nosummary = $request->getBool( 'nosummary' );
 892
 893                 // May be overridden by revision.
 894                 $this->contentModel = $request->getText( 'model', $this->contentModel );
 895                 // May be overridden by revision.
 896                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
 897
 898                 if ( !ContentHandler::getForModelID( $this->contentModel )
 899                         ->isSupportedFormat( $this->contentFormat )
 900                 ) {
 901                         throw new ErrorPageError(
 902                                 'editpage-notsupportedcontentformat-title',
 903                                 'editpage-notsupportedcontentformat-text',
 904                                 array( $this->contentFormat, ContentHandler::getLocalizedName( $this->contentModel ) )
 905                         );
 906                 }
 907
 908                 /**
 909                  * @todo Check if the desired model is allowed in this namespace, and if
 910                  *   a transition from the page's current model to the new model is
 911                  *   allowed.
 912                  */
 913
 914                 $this->live = $request->getCheck( 'live' );
 915                 $this->editintro = $request->getText( 'editintro',
 916                         // Custom edit intro for new sections
 917                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 918
 919                 // Allow extensions to modify form data
 920                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 921
 922                 wfProfileOut( __METHOD__ );
 923         }
 924
 925         /**
 926          * Subpage overridable method for extracting the page content data from the
 927          * posted form to be placed in $this->textbox1, if using customized input
 928          * this method should be overridden and return the page text that will be used
 929          * for saving, preview parsing and so on...
 930          *
 931          * @param WebRequest $request
 932          */
 933         protected function importContentFormData( &$request ) {
 934                 return; // Don't do anything, EditPage already extracted wpTextbox1
 935         }
 936
 937         /**
 938          * Initialise form fields in the object
 939          * Called on the first invocation, e.g. when a user clicks an edit link
 940          * @return bool If the requested section is valid
 941          */
 942         function initialiseForm() {
 943                 global $wgUser;
 944                 $this->edittime = $this->mArticle->getTimestamp();
 945
 946                 $content = $this->getContentObject( false ); #TODO: track content object?!
 947                 if ( $content === false ) {
 948                         return false;
 949                 }
 950                 $this->textbox1 = $this->toEditText( $content );
 951
 952                 // activate checkboxes if user wants them to be always active
 953                 # Sort out the "watch" checkbox
 954                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 955                         # Watch all edits
 956                         $this->watchthis = true;
 957                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 958                         # Watch creations
 959                         $this->watchthis = true;
 960                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
 961                         # Already watched
 962                         $this->watchthis = true;
 963                 }
 964                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 965                         $this->minoredit = true;
 966                 }
 967                 if ( $this->textbox1 === false ) {
 968                         return false;
 969                 }
 970                 return true;
 971         }
 972
 973         /**
 974          * Fetch initial editing page content.
 975          *
 976          * @param string|bool $def_text
 977          * @return string|bool String on success, $def_text for invalid sections
 978          * @private
 979          * @deprecated since 1.21, get WikiPage::getContent() instead.
 980          */
 981         function getContent( $def_text = false ) {
 982                 ContentHandler::deprecated( __METHOD__, '1.21' );
 983
 984                 if ( $def_text !== null && $def_text !== false && $def_text !== '' ) {
 985                         $def_content = $this->toEditContent( $def_text );
 986                 } else {
 987                         $def_content = false;
 988                 }
 989
 990                 $content = $this->getContentObject( $def_content );
 991
 992                 // Note: EditPage should only be used with text based content anyway.
 993                 return $this->toEditText( $content );
 994         }
 995
 996         /**
 997          * @param Content|null $def_content The default value to return
 998          *
 999          * @return Content|null Content on success, $def_content for invalid sections
1000          *
1001          * @since 1.21
1002          */
1003         protected function getContentObject( $def_content = null ) {
1004                 global $wgOut, $wgRequest, $wgUser, $wgContLang;
1005
1006                 wfProfileIn( __METHOD__ );
1007
1008                 $content = false;
1009
1010                 // For message page not locally set, use the i18n message.
1011                 // For other non-existent articles, use preload text if any.
1012                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
1013                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
1014                                 # If this is a system message, get the default text.
1015                                 $msg = $this->mTitle->getDefaultMessageText();
1016
1017                                 $content = $this->toEditContent( $msg );
1018                         }
1019                         if ( $content === false ) {
1020                                 # If requested, preload some text.
1021                                 $preload = $wgRequest->getVal( 'preload',
1022                                         // Custom preload text for new sections
1023                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1024                                 $params = $wgRequest->getArray( 'preloadparams', array() );
1025
1026                                 $content = $this->getPreloadedContent( $preload, $params );
1027                         }
1028                 // For existing pages, get text based on "undo" or section parameters.
1029                 } else {
1030                         if ( $this->section != '' ) {
1031                                 // Get section edit text (returns $def_text for invalid sections)
1032                                 $orig = $this->getOriginalContent( $wgUser );
1033                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1034
1035                                 if ( !$content ) {
1036                                         $content = $def_content;
1037                                 }
1038                         } else {
1039                                 $undoafter = $wgRequest->getInt( 'undoafter' );
1040                                 $undo = $wgRequest->getInt( 'undo' );
1041
1042                                 if ( $undo > 0 && $undoafter > 0 ) {
1043
1044                                         $undorev = Revision::newFromId( $undo );
1045                                         $oldrev = Revision::newFromId( $undoafter );
1046
1047                                         # Sanity check, make sure it's the right page,
1048                                         # the revisions exist and they were not deleted.
1049                                         # Otherwise, $content will be left as-is.
1050                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1051                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1052                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
1053
1054                                                 $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
1055
1056                                                 if ( $content === false ) {
1057                                                         # Warn the user that something went wrong
1058                                                         $undoMsg = 'failure';
1059                                                 } else {
1060                                                         $oldContent = $this->mArticle->getPage()->getContent( Revision::RAW );
1061                                                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
1062                                                         $newContent = $content->preSaveTransform( $this->mTitle, $wgUser, $popts );
1063
1064                                                         if ( $newContent->equals( $oldContent ) ) {
1065                                                                 # Tell the user that the undo results in no change,
1066                                                                 # i.e. the revisions were already undone.
1067                                                                 $undoMsg = 'nochange';
1068                                                                 $content = false;
1069                                                         } else {
1070                                                                 # Inform the user of our success and set an automatic edit summary
1071                                                                 $undoMsg = 'success';
1072
1073                                                                 # If we just undid one rev, use an autosummary
1074                                                                 $firstrev = $oldrev->getNext();
1075                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1076                                                                         $userText = $undorev->getUserText();
1077                                                                         if ( $userText === '' ) {
1078                                                                                 $undoSummary = wfMessage(
1079                                                                                         'undo-summary-username-hidden',
1080                                                                                         $undo
1081                                                                                 )->inContentLanguage()->text();
1082                                                                         } else {
1083                                                                                 $undoSummary = wfMessage(
1084                                                                                         'undo-summary',
1085                                                                                         $undo,
1086                                                                                         $userText
1087                                                                                 )->inContentLanguage()->text();
1088                                                                         }
1089                                                                         if ( $this->summary === '' ) {
1090                                                                                 $this->summary = $undoSummary;
1091                                                                         } else {
1092                                                                                 $this->summary = $undoSummary . wfMessage( 'colon-separator' )
1093                                                                                         ->inContentLanguage()->text() . $this->summary;
1094                                                                         }
1095                                                                         $this->undidRev = $undo;
1096                                                                 }
1097                                                                 $this->formtype = 'diff';
1098                                                         }
1099                                                 }
1100                                         } else {
1101                                                 // Failed basic sanity checks.
1102                                                 // Older revisions may have been removed since the link
1103                                                 // was created, or we may simply have got bogus input.
1104                                                 $undoMsg = 'norev';
1105                                         }
1106
1107                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1108                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1109                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
1110                                                 wfMessage( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1111                                 }
1112
1113                                 if ( $content === false ) {
1114                                         $content = $this->getOriginalContent( $wgUser );
1115                                 }
1116                         }
1117                 }
1118
1119                 wfProfileOut( __METHOD__ );
1120                 return $content;
1121         }
1122
1123         /**
1124          * Get the content of the wanted revision, without section extraction.
1125          *
1126          * The result of this function can be used to compare user's input with
1127          * section replaced in its context (using WikiPage::replaceSection())
1128          * to the original text of the edit.
1129          *
1130          * This differs from Article::getContent() that when a missing revision is
1131          * encountered the result will be null and not the
1132          * 'missing-revision' message.
1133          *
1134          * @since 1.19
1135          * @param User $user The user to get the revision for
1136          * @return Content|null
1137          */
1138         private function getOriginalContent( User $user ) {
1139                 if ( $this->section == 'new' ) {
1140                         return $this->getCurrentContent();
1141                 }
1142                 $revision = $this->mArticle->getRevisionFetched();
1143                 if ( $revision === null ) {
1144                         if ( !$this->contentModel ) {
1145                                 $this->contentModel = $this->getTitle()->getContentModel();
1146                         }
1147                         $handler = ContentHandler::getForModelID( $this->contentModel );
1148
1149                         return $handler->makeEmptyContent();
1150                 }
1151                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1152                 return $content;
1153         }
1154
1155         /**
1156          * Get the current content of the page. This is basically similar to
1157          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1158          * content object is returned instead of null.
1159          *
1160          * @since 1.21
1161          * @return Content
1162          */
1163         protected function getCurrentContent() {
1164                 $rev = $this->mArticle->getRevision();
1165                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1166
1167                 if ( $content === false || $content === null ) {
1168                         if ( !$this->contentModel ) {
1169                                 $this->contentModel = $this->getTitle()->getContentModel();
1170                         }
1171                         $handler = ContentHandler::getForModelID( $this->contentModel );
1172
1173                         return $handler->makeEmptyContent();
1174                 } else {
1175                         # nasty side-effect, but needed for consistency
1176                         $this->contentModel = $rev->getContentModel();
1177                         $this->contentFormat = $rev->getContentFormat();
1178
1179                         return $content;
1180                 }
1181         }
1182
1183         /**
1184          * Use this method before edit() to preload some text into the edit box
1185          *
1186          * @param string $text
1187          * @deprecated since 1.21, use setPreloadedContent() instead.
1188          */
1189         public function setPreloadedText( $text ) {
1190                 ContentHandler::deprecated( __METHOD__, "1.21" );
1191
1192                 $content = $this->toEditContent( $text );
1193
1194                 $this->setPreloadedContent( $content );
1195         }
1196
1197         /**
1198          * Use this method before edit() to preload some content into the edit box
1199          *
1200          * @param Content $content
1201          *
1202          * @since 1.21
1203          */
1204         public function setPreloadedContent( Content $content ) {
1205                 $this->mPreloadContent = $content;
1206         }
1207
1208         /**
1209          * Get the contents to be preloaded into the box, either set by
1210          * an earlier setPreloadText() or by loading the given page.
1211          *
1212          * @param string $preload Representing the title to preload from.
1213          *
1214          * @return string
1215          *
1216          * @deprecated since 1.21, use getPreloadedContent() instead
1217          */
1218         protected function getPreloadedText( $preload ) {
1219                 ContentHandler::deprecated( __METHOD__, "1.21" );
1220
1221                 $content = $this->getPreloadedContent( $preload );
1222                 $text = $this->toEditText( $content );
1223
1224                 return $text;
1225         }
1226
1227         /**
1228          * Get the contents to be preloaded into the box, either set by
1229          * an earlier setPreloadText() or by loading the given page.
1230          *
1231          * @param string $preload Representing the title to preload from.
1232          * @param array $params Parameters to use (interface-message style) in the preloaded text
1233          *
1234          * @return Content
1235          *
1236          * @since 1.21
1237          */
1238         protected function getPreloadedContent( $preload, $params = array() ) {
1239                 global $wgUser;
1240
1241                 if ( !empty( $this->mPreloadContent ) ) {
1242                         return $this->mPreloadContent;
1243                 }
1244
1245                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1246
1247                 if ( $preload === '' ) {
1248                         return $handler->makeEmptyContent();
1249                 }
1250
1251                 $title = Title::newFromText( $preload );
1252                 # Check for existence to avoid getting MediaWiki:Noarticletext
1253                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1254                         //TODO: somehow show a warning to the user!
1255                         return $handler->makeEmptyContent();
1256                 }
1257
1258                 $page = WikiPage::factory( $title );
1259                 if ( $page->isRedirect() ) {
1260                         $title = $page->getRedirectTarget();
1261                         # Same as before
1262                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1263                                 //TODO: somehow show a warning to the user!
1264                                 return $handler->makeEmptyContent();
1265                         }
1266                         $page = WikiPage::factory( $title );
1267                 }
1268
1269                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1270                 $content = $page->getContent( Revision::RAW );
1271
1272                 if ( !$content ) {
1273                         //TODO: somehow show a warning to the user!
1274                         return $handler->makeEmptyContent();
1275                 }
1276
1277                 if ( $content->getModel() !== $handler->getModelID() ) {
1278                         $converted = $content->convert( $handler->getModelID() );
1279
1280                         if ( !$converted ) {
1281                                 //TODO: somehow show a warning to the user!
1282                                 wfDebug( "Attempt to preload incompatible content: "
1283                                                 . "can't convert " . $content->getModel()
1284                                                 . " to " . $handler->getModelID() );
1285
1286                                 return $handler->makeEmptyContent();
1287                         }
1288
1289                         $content = $converted;
1290                 }
1291
1292                 return $content->preloadTransform( $title, $parserOptions, $params );
1293         }
1294
1295         /**
1296          * Make sure the form isn't faking a user's credentials.
1297          *
1298          * @param WebRequest $request
1299          * @return bool
1300          * @private
1301          */
1302         function tokenOk( &$request ) {
1303                 global $wgUser;
1304                 $token = $request->getVal( 'wpEditToken' );
1305                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1306                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1307                 return $this->mTokenOk;
1308         }
1309
1310         /**
1311          * Sets post-edit cookie indicating the user just saved a particular revision.
1312          *
1313          * This uses a temporary cookie for each revision ID so separate saves will never
1314          * interfere with each other.
1315          *
1316          * The cookie is deleted in the mediawiki.action.view.postEdit JS module after
1317          * the redirect.  It must be clearable by JavaScript code, so it must not be
1318          * marked HttpOnly. The JavaScript code converts the cookie to a wgPostEdit config
1319          * variable.
1320          *
1321          * If the variable were set on the server, it would be cached, which is unwanted
1322          * since the post-edit state should only apply to the load right after the save.
1323          *
1324          * @param int $statusValue The status value (to check for new article status)
1325          */
1326         protected function setPostEditCookie( $statusValue ) {
1327                 $revisionId = $this->mArticle->getLatest();
1328                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1329
1330                 $val = 'saved';
1331                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1332                         $val = 'created';
1333                 } elseif ( $this->oldid ) {
1334                         $val = 'restored';
1335                 }
1336
1337                 $response = RequestContext::getMain()->getRequest()->response();
1338                 $response->setcookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION, array(
1339                         'httpOnly' => false,
1340                 ) );
1341         }
1342
1343         /**
1344          * Attempt submission
1345          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1346          * @return bool False if output is done, true if the rest of the form should be displayed
1347          */
1348         public function attemptSave() {
1349                 global $wgUser;
1350
1351                 $resultDetails = false;
1352                 # Allow bots to exempt some edits from bot flagging
1353                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1354                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1355
1356                 return $this->handleStatus( $status, $resultDetails );
1357         }
1358
1359         /**
1360          * Handle status, such as after attempt save
1361          *
1362          * @param Status $status
1363          * @param array|bool $resultDetails
1364          *
1365          * @throws ErrorPageError
1366          * @return bool False, if output is done, true if rest of the form should be displayed
1367          */
1368         private function handleStatus( Status $status, $resultDetails ) {
1369                 global $wgUser, $wgOut;
1370
1371                 /**
1372                  * @todo FIXME: once the interface for internalAttemptSave() is made
1373                  *   nicer, this should use the message in $status
1374                  */
1375                 if ( $status->value == self::AS_SUCCESS_UPDATE
1376                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1377                 ) {
1378                         $this->didSave = true;
1379                         if ( !$resultDetails['nullEdit'] ) {
1380                                 $this->setPostEditCookie( $status->value );
1381                         }
1382                 }
1383
1384                 switch ( $status->value ) {
1385                         case self::AS_HOOK_ERROR_EXPECTED:
1386                         case self::AS_CONTENT_TOO_BIG:
1387                         case self::AS_ARTICLE_WAS_DELETED:
1388                         case self::AS_CONFLICT_DETECTED:
1389                         case self::AS_SUMMARY_NEEDED:
1390                         case self::AS_TEXTBOX_EMPTY:
1391                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1392                         case self::AS_END:
1393                                 return true;
1394
1395                         case self::AS_HOOK_ERROR:
1396                                 return false;
1397
1398                         case self::AS_PARSE_ERROR:
1399                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>' );
1400                                 return true;
1401
1402                         case self::AS_SUCCESS_NEW_ARTICLE:
1403                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1404                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1405                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1406                                 return false;
1407
1408                         case self::AS_SUCCESS_UPDATE:
1409                                 $extraQuery = '';
1410                                 $sectionanchor = $resultDetails['sectionanchor'];
1411
1412                                 // Give extensions a chance to modify URL query on update
1413                                 wfRunHooks(
1414                                         'ArticleUpdateBeforeRedirect',
1415                                         array( $this->mArticle, &$sectionanchor, &$extraQuery )
1416                                 );
1417
1418                                 if ( $resultDetails['redirect'] ) {
1419                                         if ( $extraQuery == '' ) {
1420                                                 $extraQuery = 'redirect=no';
1421                                         } else {
1422                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1423                                         }
1424                                 }
1425                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1426                                 return false;
1427
1428                         case self::AS_BLANK_ARTICLE:
1429                                 $wgOut->redirect( $this->getContextTitle()->getFullURL() );
1430                                 return false;
1431
1432                         case self::AS_SPAM_ERROR:
1433                                 $this->spamPageWithContent( $resultDetails['spam'] );
1434                                 return false;
1435
1436                         case self::AS_BLOCKED_PAGE_FOR_USER:
1437                                 throw new UserBlockedError( $wgUser->getBlock() );
1438
1439                         case self::AS_IMAGE_REDIRECT_ANON:
1440                         case self::AS_IMAGE_REDIRECT_LOGGED:
1441                                 throw new PermissionsError( 'upload' );
1442
1443                         case self::AS_READ_ONLY_PAGE_ANON:
1444                         case self::AS_READ_ONLY_PAGE_LOGGED:
1445                                 throw new PermissionsError( 'edit' );
1446
1447                         case self::AS_READ_ONLY_PAGE:
1448                                 throw new ReadOnlyError;
1449
1450                         case self::AS_RATE_LIMITED:
1451                                 throw new ThrottledError();
1452
1453                         case self::AS_NO_CREATE_PERMISSION:
1454                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1455                                 throw new PermissionsError( $permission );
1456
1457                         default:
1458                                 // We don't recognize $status->value. The only way that can happen
1459                                 // is if an extension hook aborted from inside ArticleSave.
1460                                 // Render the status object into $this->hookError
1461                                 // FIXME this sucks, we should just use the Status object throughout
1462                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1463                                         '</div>';
1464                                 return true;
1465                 }
1466         }
1467
1468         /**
1469          * Run hooks that can filter edits just before they get saved.
1470          *
1471          * @param Content $content The Content to filter.
1472          * @param Status $status For reporting the outcome to the caller
1473          * @param User $user The user performing the edit
1474          *
1475          * @return bool
1476          */
1477         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1478                 // Run old style post-section-merge edit filter
1479                 if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged',
1480                         array( $this, $content, &$this->hookError, $this->summary ) ) ) {
1481
1482                         # Error messages etc. could be handled within the hook...
1483                         $status->fatal( 'hookaborted' );
1484                         $status->value = self::AS_HOOK_ERROR;
1485                         return false;
1486                 } elseif ( $this->hookError != '' ) {
1487                         # ...or the hook could be expecting us to produce an error
1488                         $status->fatal( 'hookaborted' );
1489                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1490                         return false;
1491                 }
1492
1493                 // Run new style post-section-merge edit filter
1494                 if ( !wfRunHooks( 'EditFilterMergedContent',
1495                         array( $this->mArticle->getContext(), $content, $status, $this->summary,
1496                                 $user, $this->minoredit ) ) ) {
1497
1498                         # Error messages etc. could be handled within the hook...
1499                         // XXX: $status->value may already be something informative...
1500                         $this->hookError = $status->getWikiText();
1501                         $status->fatal( 'hookaborted' );
1502                         $status->value = self::AS_HOOK_ERROR;
1503                         return false;
1504                 } elseif ( !$status->isOK() ) {
1505                         # ...or the hook could be expecting us to produce an error
1506                         // FIXME this sucks, we should just use the Status object throughout
1507                         $this->hookError = $status->getWikiText();
1508                         $status->fatal( 'hookaborted' );
1509                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1510                         return false;
1511                 }
1512
1513                 return true;
1514         }
1515
1516         /**
1517          * Return the summary to be used for a new section.
1518          *
1519          * @param string $sectionanchor Set to the section anchor text
1520          * @return string
1521          */
1522         private function newSectionSummary( &$sectionanchor = null ) {
1523                 global $wgParser;
1524
1525                 if ( $this->sectiontitle !== '' ) {
1526                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1527                         // If no edit summary was specified, create one automatically from the section
1528                         // title and have it link to the new section. Otherwise, respect the summary as
1529                         // passed.
1530                         if ( $this->summary === '' ) {
1531                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1532                                 return wfMessage( 'newsectionsummary' )
1533                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1534                         }
1535                 } elseif ( $this->summary !== '' ) {
1536                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1537                         # This is a new section, so create a link to the new section
1538                         # in the revision summary.
1539                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1540                         return wfMessage( 'newsectionsummary' )
1541                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1542                 } else {
1543                         return $this->summary;
1544                 }
1545         }
1546
1547         /**
1548          * Attempt submission (no UI)
1549          *
1550          * @param array $result Array to add statuses to, currently with the
1551          *   possible keys:
1552          *   - spam (string): Spam string from content if any spam is detected by
1553          *     matchSpamRegex.
1554          *   - sectionanchor (string): Section anchor for a section save.
1555          *   - nullEdit (boolean): Set if doEditContent is OK.  True if null edit,
1556          *     false otherwise.
1557          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1558          *     revision is a redirect.
1559          * @param bool $bot True if edit is being made under the bot right.
1560          *
1561          * @return Status Status object, possibly with a message, but always with
1562          *   one of the AS_* constants in $status->value,
1563          *
1564          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1565          *   various error display idiosyncrasies. There are also lots of cases
1566          *   where error metadata is set in the object and retrieved later instead
1567          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1568          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1569          * time.
1570          */
1571         function internalAttemptSave( &$result, $bot = false ) {
1572                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1573
1574                 $status = Status::newGood();
1575
1576                 wfProfileIn( __METHOD__ );
1577                 wfProfileIn( __METHOD__ . '-checks' );
1578
1579                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
1580                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1581                         $status->fatal( 'hookaborted' );
1582                         $status->value = self::AS_HOOK_ERROR;
1583                         wfProfileOut( __METHOD__ . '-checks' );
1584                         wfProfileOut( __METHOD__ );
1585                         return $status;
1586                 }
1587
1588                 $spam = $wgRequest->getText( 'wpAntispam' );
1589                 if ( $spam !== '' ) {
1590                         wfDebugLog(
1591                                 'SimpleAntiSpam',
1592                                 $wgUser->getName() .
1593                                 ' editing "' .
1594                                 $this->mTitle->getPrefixedText() .
1595                                 '" submitted bogus field "' .
1596                                 $spam .
1597                                 '"'
1598                         );
1599                         $status->fatal( 'spamprotectionmatch', false );
1600                         $status->value = self::AS_SPAM_ERROR;
1601                         wfProfileOut( __METHOD__ . '-checks' );
1602                         wfProfileOut( __METHOD__ );
1603                         return $status;
1604                 }
1605
1606                 try {
1607                         # Construct Content object
1608                         $textbox_content = $this->toEditContent( $this->textbox1 );
1609                 } catch ( MWContentSerializationException $ex ) {
1610                         $status->fatal(
1611                                 'content-failed-to-parse',
1612                                 $this->contentModel,
1613                                 $this->contentFormat,
1614                                 $ex->getMessage()
1615                         );
1616                         $status->value = self::AS_PARSE_ERROR;
1617                         wfProfileOut( __METHOD__ . '-checks' );
1618                         wfProfileOut( __METHOD__ );
1619                         return $status;
1620                 }
1621
1622                 # Check image redirect
1623                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1624                         $textbox_content->isRedirect() &&
1625                         !$wgUser->isAllowed( 'upload' )
1626                 ) {
1627                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1628                                 $status->setResult( false, $code );
1629
1630                                 wfProfileOut( __METHOD__ . '-checks' );
1631                                 wfProfileOut( __METHOD__ );
1632
1633                                 return $status;
1634                 }
1635
1636                 # Check for spam
1637                 $match = self::matchSummarySpamRegex( $this->summary );
1638                 if ( $match === false && $this->section == 'new' ) {
1639                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1640                         # regular summaries, it is added to the actual wikitext.
1641                         if ( $this->sectiontitle !== '' ) {
1642                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1643                                 $match = self::matchSpamRegex( $this->sectiontitle );
1644                         } else {
1645                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1646                                 # is used with the 'summary' parameter.
1647                                 $match = self::matchSpamRegex( $this->summary );
1648                         }
1649                 }
1650                 if ( $match === false ) {
1651                         $match = self::matchSpamRegex( $this->textbox1 );
1652                 }
1653                 if ( $match !== false ) {
1654                         $result['spam'] = $match;
1655                         $ip = $wgRequest->getIP();
1656                         $pdbk = $this->mTitle->getPrefixedDBkey();
1657                         $match = str_replace( "\n", '', $match );
1658                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1659                         $status->fatal( 'spamprotectionmatch', $match );
1660                         $status->value = self::AS_SPAM_ERROR;
1661                         wfProfileOut( __METHOD__ . '-checks' );
1662                         wfProfileOut( __METHOD__ );
1663                         return $status;
1664                 }
1665                 if ( !wfRunHooks(
1666                         'EditFilter',
1667                         array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) )
1668                 ) {
1669                         # Error messages etc. could be handled within the hook...
1670                         $status->fatal( 'hookaborted' );
1671                         $status->value = self::AS_HOOK_ERROR;
1672                         wfProfileOut( __METHOD__ . '-checks' );
1673                         wfProfileOut( __METHOD__ );
1674                         return $status;
1675                 } elseif ( $this->hookError != '' ) {
1676                         # ...or the hook could be expecting us to produce an error
1677                         $status->fatal( 'hookaborted' );
1678                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1679                         wfProfileOut( __METHOD__ . '-checks' );
1680                         wfProfileOut( __METHOD__ );
1681                         return $status;
1682                 }
1683
1684                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1685                         // Auto-block user's IP if the account was "hard" blocked
1686                         $wgUser->spreadAnyEditBlock();
1687                         # Check block state against master, thus 'false'.
1688                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1689                         wfProfileOut( __METHOD__ . '-checks' );
1690                         wfProfileOut( __METHOD__ );
1691                         return $status;
1692                 }
1693
1694                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1695                 if ( $this->kblength > $wgMaxArticleSize ) {
1696                         // Error will be displayed by showEditForm()
1697                         $this->tooBig = true;
1698                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1699                         wfProfileOut( __METHOD__ . '-checks' );
1700                         wfProfileOut( __METHOD__ );
1701                         return $status;
1702                 }
1703
1704                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1705                         if ( $wgUser->isAnon() ) {
1706                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1707                                 wfProfileOut( __METHOD__ . '-checks' );
1708                                 wfProfileOut( __METHOD__ );
1709                                 return $status;
1710                         } else {
1711                                 $status->fatal( 'readonlytext' );
1712                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1713                                 wfProfileOut( __METHOD__ . '-checks' );
1714                                 wfProfileOut( __METHOD__ );
1715                                 return $status;
1716                         }
1717                 }
1718
1719                 if ( wfReadOnly() ) {
1720                         $status->fatal( 'readonlytext' );
1721                         $status->value = self::AS_READ_ONLY_PAGE;
1722                         wfProfileOut( __METHOD__ . '-checks' );
1723                         wfProfileOut( __METHOD__ );
1724                         return $status;
1725                 }
1726                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 ) ) {
1727                         $status->fatal( 'actionthrottledtext' );
1728                         $status->value = self::AS_RATE_LIMITED;
1729                         wfProfileOut( __METHOD__ . '-checks' );
1730                         wfProfileOut( __METHOD__ );
1731                         return $status;
1732                 }
1733
1734                 # If the article has been deleted while editing, don't save it without
1735                 # confirmation
1736                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1737                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1738                         wfProfileOut( __METHOD__ . '-checks' );
1739                         wfProfileOut( __METHOD__ );
1740                         return $status;
1741                 }
1742
1743                 wfProfileOut( __METHOD__ . '-checks' );
1744
1745                 # Load the page data from the master. If anything changes in the meantime,
1746                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1747                 $this->mArticle->loadPageData( 'fromdbmaster' );
1748                 $new = !$this->mArticle->exists();
1749
1750                 if ( $new ) {
1751                         // Late check for create permission, just in case *PARANOIA*
1752                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1753                                 $status->fatal( 'nocreatetext' );
1754                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1755                                 wfDebug( __METHOD__ . ": no create permission\n" );
1756                                 wfProfileOut( __METHOD__ );
1757                                 return $status;
1758                         }
1759
1760                         // Don't save a new page if it's blank or if it's a MediaWiki:
1761                         // message with content equivalent to default (allow empty pages
1762                         // in this case to disable messages, see bug 50124)
1763                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1764                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1765                                 $defaultText = $defaultMessageText;
1766                         } else {
1767                                 $defaultText = '';
1768                         }
1769
1770                         if ( $this->textbox1 === $defaultText ) {
1771                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1772                                 wfProfileOut( __METHOD__ );
1773                                 return $status;
1774                         }
1775
1776                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1777                                 wfProfileOut( __METHOD__ );
1778                                 return $status;
1779                         }
1780
1781                         $content = $textbox_content;
1782
1783                         $result['sectionanchor'] = '';
1784                         if ( $this->section == 'new' ) {
1785                                 if ( $this->sectiontitle !== '' ) {
1786                                         // Insert the section title above the content.
1787                                         $content = $content->addSectionHeader( $this->sectiontitle );
1788                                 } elseif ( $this->summary !== '' ) {
1789                                         // Insert the section title above the content.
1790                                         $content = $content->addSectionHeader( $this->summary );
1791                                 }
1792                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
1793                         }
1794
1795                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1796
1797                 } else { # not $new
1798
1799                         # Article exists. Check for edit conflict.
1800
1801                         $this->mArticle->clear(); # Force reload of dates, etc.
1802                         $timestamp = $this->mArticle->getTimestamp();
1803
1804                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1805
1806                         if ( $timestamp != $this->edittime ) {
1807                                 $this->isConflict = true;
1808                                 if ( $this->section == 'new' ) {
1809                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1810                                                 $this->mArticle->getComment() == $this->newSectionSummary()
1811                                         ) {
1812                                                 // Probably a duplicate submission of a new comment.
1813                                                 // This can happen when squid resends a request after
1814                                                 // a timeout but the first one actually went through.
1815                                                 wfDebug( __METHOD__
1816                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1817                                         } else {
1818                                                 // New comment; suppress conflict.
1819                                                 $this->isConflict = false;
1820                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1821                                         }
1822                                 } elseif ( $this->section == ''
1823                                         && Revision::userWasLastToEdit(
1824                                                 DB_MASTER, $this->mTitle->getArticleID(),
1825                                                 $wgUser->getId(), $this->edittime
1826                                         )
1827                                 ) {
1828                                         # Suppress edit conflict with self, except for section edits where merging is required.
1829                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1830                                         $this->isConflict = false;
1831                                 }
1832                         }
1833
1834                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
1835                         if ( $this->sectiontitle !== '' ) {
1836                                 $sectionTitle = $this->sectiontitle;
1837                         } else {
1838                                 $sectionTitle = $this->summary;
1839                         }
1840
1841                         $content = null;
1842
1843                         if ( $this->isConflict ) {
1844                                 wfDebug( __METHOD__
1845                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1846                                         . " (article time '{$timestamp}')\n" );
1847
1848                                 $content = $this->mArticle->replaceSectionContent(
1849                                         $this->section,
1850                                         $textbox_content,
1851                                         $sectionTitle,
1852                                         $this->edittime
1853                                 );
1854                         } else {
1855                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1856                                 $content = $this->mArticle->replaceSectionContent(
1857                                         $this->section,
1858                                         $textbox_content,
1859                                         $sectionTitle
1860                                 );
1861                         }
1862
1863                         if ( is_null( $content ) ) {
1864                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1865                                 $this->isConflict = true;
1866                                 $content = $textbox_content; // do not try to merge here!
1867                         } elseif ( $this->isConflict ) {
1868                                 # Attempt merge
1869                                 if ( $this->mergeChangesIntoContent( $content ) ) {
1870                                         // Successful merge! Maybe we should tell the user the good news?
1871                                         $this->isConflict = false;
1872                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1873                                 } else {
1874                                         $this->section = '';
1875                                         $this->textbox1 = ContentHandler::getContentText( $content );
1876                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1877                                 }
1878                         }
1879
1880                         if ( $this->isConflict ) {
1881                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1882                                 wfProfileOut( __METHOD__ );
1883                                 return $status;
1884                         }
1885
1886                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
1887                                 wfProfileOut( __METHOD__ );
1888                                 return $status;
1889                         }
1890
1891                         if ( $this->section == 'new' ) {
1892                                 // Handle the user preference to force summaries here
1893                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
1894                                         $this->missingSummary = true;
1895                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1896                                         $status->value = self::AS_SUMMARY_NEEDED;
1897                                         wfProfileOut( __METHOD__ );
1898                                         return $status;
1899                                 }
1900
1901                                 // Do not allow the user to post an empty comment
1902                                 if ( $this->textbox1 == '' ) {
1903                                         $this->missingComment = true;
1904                                         $status->fatal( 'missingcommenttext' );
1905                                         $status->value = self::AS_TEXTBOX_EMPTY;
1906                                         wfProfileOut( __METHOD__ );
1907                                         return $status;
1908                                 }
1909                         } elseif ( !$this->allowBlankSummary
1910                                 && !$content->equals( $this->getOriginalContent( $wgUser ) )
1911                                 && !$content->isRedirect()
1912                                 && md5( $this->summary ) == $this->autoSumm
1913                         ) {
1914                                 $this->missingSummary = true;
1915                                 $status->fatal( 'missingsummary' );
1916                                 $status->value = self::AS_SUMMARY_NEEDED;
1917                                 wfProfileOut( __METHOD__ );
1918                                 return $status;
1919                         }
1920
1921                         # All's well
1922                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1923                         $sectionanchor = '';
1924                         if ( $this->section == 'new' ) {
1925                                 $this->summary = $this->newSectionSummary( $sectionanchor );
1926                         } elseif ( $this->section != '' ) {
1927                                 # Try to get a section anchor from the section source, redirect
1928                                 # to edited section if header found.
1929                                 # XXX: Might be better to integrate this into Article::replaceSection
1930                                 # for duplicate heading checking and maybe parsing.
1931                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1932                                 # We can't deal with anchors, includes, html etc in the header for now,
1933                                 # headline would need to be parsed to improve this.
1934                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1935                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1936                                 }
1937                         }
1938                         $result['sectionanchor'] = $sectionanchor;
1939                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1940
1941                         // Save errors may fall down to the edit form, but we've now
1942                         // merged the section into full text. Clear the section field
1943                         // so that later submission of conflict forms won't try to
1944                         // replace that into a duplicated mess.
1945                         $this->textbox1 = $this->toEditText( $content );
1946                         $this->section = '';
1947
1948                         $status->value = self::AS_SUCCESS_UPDATE;
1949                 }
1950
1951                 // Check for length errors again now that the section is merged in
1952                 $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1953                 if ( $this->kblength > $wgMaxArticleSize ) {
1954                         $this->tooBig = true;
1955                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1956                         wfProfileOut( __METHOD__ );
1957                         return $status;
1958                 }
1959
1960                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1961                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1962                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1963                         ( $bot ? EDIT_FORCE_BOT : 0 );
1964
1965                 $doEditStatus = $this->mArticle->doEditContent( $content, $this->summary, $flags,
1966                                                                                                                 false, null, $this->contentFormat );
1967
1968                 if ( !$doEditStatus->isOK() ) {
1969                         // Failure from doEdit()
1970                         // Show the edit conflict page for certain recognized errors from doEdit(),
1971                         // but don't show it for errors from extension hooks
1972                         $errors = $doEditStatus->getErrorsArray();
1973                         if ( in_array( $errors[0][0],
1974                                         array( 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ) )
1975                         ) {
1976                                 $this->isConflict = true;
1977                                 // Destroys data doEdit() put in $status->value but who cares
1978                                 $doEditStatus->value = self::AS_END;
1979                         }
1980                         wfProfileOut( __METHOD__ );
1981                         return $doEditStatus;
1982                 }
1983
1984                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
1985                 if ( $result['nullEdit'] ) {
1986                         // We don't know if it was a null edit until now, so increment here
1987                         $wgUser->pingLimiter( 'linkpurge' );
1988                 }
1989                 $result['redirect'] = $content->isRedirect();
1990                 $this->updateWatchlist();
1991                 wfProfileOut( __METHOD__ );
1992                 return $status;
1993         }
1994
1995         /**
1996          * Register the change of watch status
1997          */
1998         protected function updateWatchlist() {
1999                 global $wgUser;
2000
2001                 if ( $wgUser->isLoggedIn()
2002                         && $this->watchthis != $wgUser->isWatched( $this->mTitle, WatchedItem::IGNORE_USER_RIGHTS )
2003                 ) {
2004                         $fname = __METHOD__;
2005                         $title = $this->mTitle;
2006                         $watch = $this->watchthis;
2007
2008                         // Do this in its own transaction to reduce contention...
2009                         $dbw = wfGetDB( DB_MASTER );
2010                         $dbw->onTransactionIdle( function () use ( $dbw, $title, $watch, $wgUser, $fname ) {
2011                                 $dbw->begin( $fname );
2012                                 WatchAction::doWatchOrUnwatch( $watch, $title, $wgUser );
2013                                 $dbw->commit( $fname );
2014                         } );
2015                 }
2016         }
2017
2018         /**
2019          * Attempts to merge text content with base and current revisions
2020          *
2021          * @param string $editText
2022          *
2023          * @return bool
2024          * @deprecated since 1.21, use mergeChangesIntoContent() instead
2025          */
2026         function mergeChangesInto( &$editText ) {
2027                 ContentHandler::deprecated( __METHOD__, "1.21" );
2028
2029                 $editContent = $this->toEditContent( $editText );
2030
2031                 $ok = $this->mergeChangesIntoContent( $editContent );
2032
2033                 if ( $ok ) {
2034                         $editText = $this->toEditText( $editContent );
2035                         return true;
2036                 }
2037                 return false;
2038         }
2039
2040         /**
2041          * Attempts to do 3-way merge of edit content with a base revision
2042          * and current content, in case of edit conflict, in whichever way appropriate
2043          * for the content type.
2044          *
2045          * @since 1.21
2046          *
2047          * @param Content $editContent
2048          *
2049          * @return bool
2050          */
2051         private function mergeChangesIntoContent( &$editContent ) {
2052                 wfProfileIn( __METHOD__ );
2053
2054                 $db = wfGetDB( DB_MASTER );
2055
2056                 // This is the revision the editor started from
2057                 $baseRevision = $this->getBaseRevision();
2058                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2059
2060                 if ( is_null( $baseContent ) ) {
2061                         wfProfileOut( __METHOD__ );
2062                         return false;
2063                 }
2064
2065                 // The current state, we want to merge updates into it
2066                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2067                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2068
2069                 if ( is_null( $currentContent ) ) {
2070                         wfProfileOut( __METHOD__ );
2071                         return false;
2072                 }
2073
2074                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2075
2076                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2077
2078                 if ( $result ) {
2079                         $editContent = $result;
2080                         wfProfileOut( __METHOD__ );
2081                         return true;
2082                 }
2083
2084                 wfProfileOut( __METHOD__ );
2085                 return false;
2086         }
2087
2088         /**
2089          * @return Revision
2090          */
2091         function getBaseRevision() {
2092                 if ( !$this->mBaseRevision ) {
2093                         $db = wfGetDB( DB_MASTER );
2094                         $this->mBaseRevision = Revision::loadFromTimestamp(
2095                                 $db, $this->mTitle, $this->edittime );
2096                 }
2097                 return $this->mBaseRevision;
2098         }
2099
2100         /**
2101          * Check given input text against $wgSpamRegex, and return the text of the first match.
2102          *
2103          * @param string $text
2104          *
2105          * @return string|bool Matching string or false
2106          */
2107         public static function matchSpamRegex( $text ) {
2108                 global $wgSpamRegex;
2109                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2110                 $regexes = (array)$wgSpamRegex;
2111                 return self::matchSpamRegexInternal( $text, $regexes );
2112         }
2113
2114         /**
2115          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2116          *
2117          * @param string $text
2118          *
2119          * @return string|bool Matching string or false
2120          */
2121         public static function matchSummarySpamRegex( $text ) {
2122                 global $wgSummarySpamRegex;
2123                 $regexes = (array)$wgSummarySpamRegex;
2124                 return self::matchSpamRegexInternal( $text, $regexes );
2125         }
2126
2127         /**
2128          * @param string $text
2129          * @param array $regexes
2130          * @return bool|string
2131          */
2132         protected static function matchSpamRegexInternal( $text, $regexes ) {
2133                 foreach ( $regexes as $regex ) {
2134                         $matches = array();
2135                         if ( preg_match( $regex, $text, $matches ) ) {
2136                                 return $matches[0];
2137                         }
2138                 }
2139                 return false;
2140         }
2141
2142         function setHeaders() {
2143                 global $wgOut, $wgUser;
2144
2145                 $wgOut->addModules( 'mediawiki.action.edit' );
2146                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
2147
2148                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
2149                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
2150                 }
2151
2152                 if ( $wgUser->getOption( 'useeditwarning', false ) ) {
2153                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
2154                 }
2155
2156                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2157
2158                 # Enabled article-related sidebar, toplinks, etc.
2159                 $wgOut->setArticleRelated( true );
2160
2161                 $contextTitle = $this->getContextTitle();
2162                 if ( $this->isConflict ) {
2163                         $msg = 'editconflict';
2164                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2165                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2166                 } else {
2167                         $msg = $contextTitle->exists()
2168                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2169                                         && $contextTitle->getDefaultMessageText() !== false
2170                                 )
2171                                 ? 'editing'
2172                                 : 'creating';
2173                 }
2174
2175                 # Use the title defined by DISPLAYTITLE magic word when present
2176                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2177                 if ( $displayTitle === false ) {
2178                         $displayTitle = $contextTitle->getPrefixedText();
2179                 }
2180                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
2181         }
2182
2183         /**
2184          * Show all applicable editing introductions
2185          */
2186         protected function showIntro() {
2187                 global $wgOut, $wgUser;
2188                 if ( $this->suppressIntro ) {
2189                         return;
2190                 }
2191
2192                 $namespace = $this->mTitle->getNamespace();
2193
2194                 if ( $namespace == NS_MEDIAWIKI ) {
2195                         # Show a warning if editing an interface message
2196                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2197                 } elseif ( $namespace == NS_FILE ) {
2198                         # Show a hint to shared repo
2199                         $file = wfFindFile( $this->mTitle );
2200                         if ( $file && !$file->isLocal() ) {
2201                                 $descUrl = $file->getDescriptionUrl();
2202                                 # there must be a description url to show a hint to shared repo
2203                                 if ( $descUrl ) {
2204                                         if ( !$this->mTitle->exists() ) {
2205                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array(
2206                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2207                                                 ) );
2208                                         } else {
2209                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
2210                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2211                                                 ) );
2212                                         }
2213                                 }
2214                         }
2215                 }
2216
2217                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2218                 # Show log extract when the user is currently blocked
2219                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2220                         $parts = explode( '/', $this->mTitle->getText(), 2 );
2221                         $username = $parts[0];
2222                         $user = User::newFromName( $username, false /* allow IP users*/ );
2223                         $ip = User::isIP( $username );
2224                         $block = Block::newFromTarget( $user, $user );
2225                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2226                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2227                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
2228                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) { # Show log extract if the user is currently blocked
2229                                 LogEventsList::showLogExtract(
2230                                         $wgOut,
2231                                         'block',
2232                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2233                                         '',
2234                                         array(
2235                                                 'lim' => 1,
2236                                                 'showIfEmpty' => false,
2237                                                 'msgKey' => array(
2238                                                         'blocked-notice-logextract',
2239                                                         $user->getName() # Support GENDER in notice
2240                                                 )
2241                                         )
2242                                 );
2243                         }
2244                 }
2245                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2246                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2247                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2248                                 wfMessage( 'helppage' )->inContentLanguage()->text()
2249                         ) );
2250                         if ( $wgUser->isLoggedIn() ) {
2251                                 $wgOut->wrapWikiMsg(
2252                                         // Suppress the external link icon, consider the help url an internal one
2253                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2254                                         array(
2255                                                 'newarticletext',
2256                                                 $helpLink
2257                                         )
2258                                 );
2259                         } else {
2260                                 $wgOut->wrapWikiMsg(
2261                                         // Suppress the external link icon, consider the help url an internal one
2262                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2263                                         array(
2264                                                 'newarticletextanon',
2265                                                 $helpLink
2266                                         )
2267                                 );
2268                         }
2269                 }
2270                 # Give a notice if the user is editing a deleted/moved page...
2271                 if ( !$this->mTitle->exists() ) {
2272                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
2273                                 '',
2274                                 array(
2275                                         'lim' => 10,
2276                                         'conds' => array( "log_action != 'revision'" ),
2277                                         'showIfEmpty' => false,
2278                                         'msgKey' => array( 'recreate-moveddeleted-warn' )
2279                                 )
2280                         );
2281                 }
2282         }
2283
2284         /**
2285          * Attempt to show a custom editing introduction, if supplied
2286          *
2287          * @return bool
2288          */
2289         protected function showCustomIntro() {
2290                 if ( $this->editintro ) {
2291                         $title = Title::newFromText( $this->editintro );
2292                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2293                                 global $wgOut;
2294                                 // Added using template syntax, to take <noinclude>'s into account.
2295                                 $wgOut->addWikiTextTitleTidy( '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>', $this->mTitle );
2296                                 return true;
2297                         }
2298                 }
2299                 return false;
2300         }
2301
2302         /**
2303          * Gets an editable textual representation of $content.
2304          * The textual representation can be turned by into a Content object by the
2305          * toEditContent() method.
2306          *
2307          * If $content is null or false or a string, $content is returned unchanged.
2308          *
2309          * If the given Content object is not of a type that can be edited using
2310          * the text base EditPage, an exception will be raised. Set
2311          * $this->allowNonTextContent to true to allow editing of non-textual
2312          * content.
2313          *
2314          * @param Content|null|bool|string $content
2315          * @return string The editable text form of the content.
2316          *
2317          * @throws MWException If $content is not an instance of TextContent and
2318          *   $this->allowNonTextContent is not true.
2319          */
2320         protected function toEditText( $content ) {
2321                 if ( $content === null || $content === false ) {
2322                         return $content;
2323                 }
2324
2325                 if ( is_string( $content ) ) {
2326                         return $content;
2327                 }
2328
2329                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2330                         throw new MWException( 'This content model is not supported: '
2331                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2332                 }
2333
2334                 return $content->serialize( $this->contentFormat );
2335         }
2336
2337         /**
2338          * Turns the given text into a Content object by unserializing it.
2339          *
2340          * If the resulting Content object is not of a type that can be edited using
2341          * the text base EditPage, an exception will be raised. Set
2342          * $this->allowNonTextContent to true to allow editing of non-textual
2343          * content.
2344          *
2345          * @param string|null|bool $text Text to unserialize
2346          * @return Content The content object created from $text. If $text was false
2347          *   or null, false resp. null will be  returned instead.
2348          *
2349          * @throws MWException If unserializing the text results in a Content
2350          *   object that is not an instance of TextContent and
2351          *   $this->allowNonTextContent is not true.
2352          */
2353         protected function toEditContent( $text ) {
2354                 if ( $text === false || $text === null ) {
2355                         return $text;
2356                 }
2357
2358                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2359                         $this->contentModel, $this->contentFormat );
2360
2361                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2362                         throw new MWException( 'This content model is not supported: '
2363                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2364                 }
2365
2366                 return $content;
2367         }
2368
2369         /**
2370          * Send the edit form and related headers to $wgOut
2371          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2372          *     during form output near the top, for captchas and the like.
2373          */
2374         function showEditForm( $formCallback = null ) {
2375                 global $wgOut, $wgUser;
2376
2377                 wfProfileIn( __METHOD__ );
2378
2379                 # need to parse the preview early so that we know which templates are used,
2380                 # otherwise users with "show preview after edit box" will get a blank list
2381                 # we parse this near the beginning so that setHeaders can do the title
2382                 # setting work instead of leaving it in getPreviewText
2383                 $previewOutput = '';
2384                 if ( $this->formtype == 'preview' ) {
2385                         $previewOutput = $this->getPreviewText();
2386                 }
2387
2388                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
2389
2390                 $this->setHeaders();
2391
2392                 if ( $this->showHeader() === false ) {
2393                         wfProfileOut( __METHOD__ );
2394                         return;
2395                 }
2396
2397                 $wgOut->addHTML( $this->editFormPageTop );
2398
2399                 if ( $wgUser->getOption( 'previewontop' ) ) {
2400                         $this->displayPreviewArea( $previewOutput, true );
2401                 }
2402
2403                 $wgOut->addHTML( $this->editFormTextTop );
2404
2405                 $showToolbar = true;
2406                 if ( $this->wasDeletedSinceLastEdit() ) {
2407                         if ( $this->formtype == 'save' ) {
2408                                 // Hide the toolbar and edit area, user can click preview to get it back
2409                                 // Add an confirmation checkbox and explanation.
2410                                 $showToolbar = false;
2411                         } else {
2412                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2413                                         'deletedwhileediting' );
2414                         }
2415                 }
2416
2417                 // @todo add EditForm plugin interface and use it here!
2418                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2419                 $wgOut->addHTML( Html::openElement(
2420                         'form',
2421                         array(
2422                                 'id' => self::EDITFORM_ID,
2423                                 'name' => self::EDITFORM_ID,
2424                                 'method' => 'post',
2425                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2426                                 'enctype' => 'multipart/form-data'
2427                         )
2428                 ) );
2429
2430                 if ( is_callable( $formCallback ) ) {
2431                         call_user_func_array( $formCallback, array( &$wgOut ) );
2432                 }
2433
2434                 // Add an empty field to trip up spambots
2435                 $wgOut->addHTML(
2436                         Xml::openElement( 'div', array( 'id' => 'antispam-container', 'style' => 'display: none;' ) )
2437                         . Html::rawElement(
2438                                 'label',
2439                                 array( 'for' => 'wpAntiSpam' ),
2440                                 wfMessage( 'simpleantispam-label' )->parse()
2441                         )
2442                         . Xml::element(
2443                                 'input',
2444                                 array(
2445                                         'type' => 'text',
2446                                         'name' => 'wpAntispam',
2447                                         'id' => 'wpAntispam',
2448                                         'value' => ''
2449                                 )
2450                         )
2451                         . Xml::closeElement( 'div' )
2452                 );
2453
2454                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
2455
2456                 // Put these up at the top to ensure they aren't lost on early form submission
2457                 $this->showFormBeforeText();
2458
2459                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2460                         $username = $this->lastDelete->user_name;
2461                         $comment = $this->lastDelete->log_comment;
2462
2463                         // It is better to not parse the comment at all than to have templates expanded in the middle
2464                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2465                         $key = $comment === ''
2466                                 ? 'confirmrecreate-noreason'
2467                                 : 'confirmrecreate';
2468                         $wgOut->addHTML(
2469                                 '<div class="mw-confirm-recreate">' .
2470                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2471                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2472                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2473                                 ) .
2474                                 '</div>'
2475                         );
2476                 }
2477
2478                 # When the summary is hidden, also hide them on preview/show changes
2479                 if ( $this->nosummary ) {
2480                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2481                 }
2482
2483                 # If a blank edit summary was previously provided, and the appropriate
2484                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2485                 # user being bounced back more than once in the event that a summary
2486                 # is not required.
2487                 #####
2488                 # For a bit more sophisticated detection of blank summaries, hash the
2489                 # automatic one and pass that in the hidden field wpAutoSummary.
2490                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2491                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2492                 }
2493
2494                 if ( $this->undidRev ) {
2495                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2496                 }
2497
2498                 if ( $this->hasPresetSummary ) {
2499                         // If a summary has been preset using &summary= we don't want to prompt for
2500                         // a different summary. Only prompt for a summary if the summary is blanked.
2501                         // (Bug 17416)
2502                         $this->autoSumm = md5( '' );
2503                 }
2504
2505                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2506                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2507
2508                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2509
2510                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2511                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2512
2513                 if ( $this->section == 'new' ) {
2514                         $this->showSummaryInput( true, $this->summary );
2515                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2516                 }
2517
2518                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2519
2520                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2521                         $wgOut->addHTML( EditPage::getEditToolbar() );
2522                 }
2523
2524                 if ( $this->isConflict ) {
2525                         // In an edit conflict bypass the overridable content form method
2526                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2527                         // resolved between page source edits and custom ui edits using the
2528                         // custom edit ui.
2529                         $this->textbox2 = $this->textbox1;
2530
2531                         $content = $this->getCurrentContent();
2532                         $this->textbox1 = $this->toEditText( $content );
2533
2534                         $this->showTextbox1();
2535                 } else {
2536                         $this->showContentForm();
2537                 }
2538
2539                 $wgOut->addHTML( $this->editFormTextAfterContent );
2540
2541                 $this->showStandardInputs();
2542
2543                 $this->showFormAfterText();
2544
2545                 $this->showTosSummary();
2546
2547                 $this->showEditTools();
2548
2549                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2550
2551                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2552                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2553
2554                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2555                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2556
2557                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'limitreport' ),
2558                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2559
2560                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2561
2562                 if ( $this->isConflict ) {
2563                         try {
2564                                 $this->showConflict();
2565                         } catch ( MWContentSerializationException $ex ) {
2566                                 // this can't really happen, but be nice if it does.
2567                                 $msg = wfMessage(
2568                                         'content-failed-to-parse',
2569                                         $this->contentModel,
2570                                         $this->contentFormat,
2571                                         $ex->getMessage()
2572                                 );
2573                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2574                         }
2575                 }
2576
2577                 // Marker for detecting truncated form data.  This must be the last
2578                 // parameter sent in order to be of use, so do not move me.
2579                 $wgOut->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2580                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2581
2582                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2583                         $this->displayPreviewArea( $previewOutput, false );
2584                 }
2585
2586                 wfProfileOut( __METHOD__ );
2587         }
2588
2589         /**
2590          * Extract the section title from current section text, if any.
2591          *
2592          * @param string $text
2593          * @return string|bool String or false
2594          */
2595         public static function extractSectionTitle( $text ) {
2596                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2597                 if ( !empty( $matches[2] ) ) {
2598                         global $wgParser;
2599                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2600                 } else {
2601                         return false;
2602                 }
2603         }
2604
2605         /**
2606          * @return bool
2607          */
2608         protected function showHeader() {
2609                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2610                 global $wgAllowUserCss, $wgAllowUserJs;
2611
2612                 if ( $this->mTitle->isTalkPage() ) {
2613                         $wgOut->addWikiMsg( 'talkpagetext' );
2614                 }
2615
2616                 // Add edit notices
2617                 $wgOut->addHTML( implode( "\n", $this->mTitle->getEditNotices( $this->oldid ) ) );
2618
2619                 if ( $this->isConflict ) {
2620                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2621                         $this->edittime = $this->mArticle->getTimestamp();
2622                 } else {
2623                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2624                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2625                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2626                                 // Someone is welcome to try refactoring though
2627                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2628                                 return false;
2629                         }
2630
2631                         if ( $this->section != '' && $this->section != 'new' ) {
2632                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2633                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); //FIXME: use Content object
2634                                         if ( $sectionTitle !== false ) {
2635                                                 $this->summary = "/* $sectionTitle */ ";
2636                                         }
2637                                 }
2638                         }
2639
2640                         if ( $this->missingComment ) {
2641                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2642                         }
2643
2644                         if ( $this->missingSummary && $this->section != 'new' ) {
2645                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2646                         }
2647
2648                         if ( $this->missingSummary && $this->section == 'new' ) {
2649                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2650                         }
2651
2652                         if ( $this->hookError !== '' ) {
2653                                 $wgOut->addWikiText( $this->hookError );
2654                         }
2655
2656                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2657                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2658                         }
2659
2660                         if ( $this->section != 'new' ) {
2661                                 $revision = $this->mArticle->getRevisionFetched();
2662                                 if ( $revision ) {
2663                                         // Let sysop know that this will make private content public if saved
2664
2665                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2666                                                 $wgOut->wrapWikiMsg(
2667                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2668                                                         'rev-deleted-text-permission'
2669                                                 );
2670                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2671                                                 $wgOut->wrapWikiMsg(
2672                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2673                                                         'rev-deleted-text-view'
2674                                                 );
2675                                         }
2676
2677                                         if ( !$revision->isCurrent() ) {
2678                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2679                                                 $wgOut->addWikiMsg( 'editingold' );
2680                                         }
2681                                 } elseif ( $this->mTitle->exists() ) {
2682                                         // Something went wrong
2683
2684                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2685                                                 array( 'missing-revision', $this->oldid ) );
2686                                 }
2687                         }
2688                 }
2689
2690                 if ( wfReadOnly() ) {
2691                         $wgOut->wrapWikiMsg(
2692                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2693                                 array( 'readonlywarning', wfReadOnlyReason() )
2694                         );
2695                 } elseif ( $wgUser->isAnon() ) {
2696                         if ( $this->formtype != 'preview' ) {
2697                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
2698                         } else {
2699                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
2700                         }
2701                 } else {
2702                         if ( $this->isCssJsSubpage ) {
2703                                 # Check the skin exists
2704                                 if ( $this->isWrongCaseCssJsPage ) {
2705                                         $wgOut->wrapWikiMsg(
2706                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
2707                                                 array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() )
2708                                         );
2709                                 }
2710                                 if ( $this->formtype !== 'preview' ) {
2711                                         if ( $this->isCssSubpage && $wgAllowUserCss ) {
2712                                                 $wgOut->wrapWikiMsg(
2713                                                         "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
2714                                                         array( 'usercssyoucanpreview' )
2715                                                 );
2716                                         }
2717
2718                                         if ( $this->isJsSubpage && $wgAllowUserJs ) {
2719                                                 $wgOut->wrapWikiMsg(
2720                                                         "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
2721                                                         array( 'userjsyoucanpreview' )
2722                                                 );
2723                                         }
2724                                 }
2725                         }
2726                 }
2727
2728                 if ( $this->mTitle->isProtected( 'edit' ) &&
2729                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2730                 ) {
2731                         # Is the title semi-protected?
2732                         if ( $this->mTitle->isSemiProtected() ) {
2733                                 $noticeMsg = 'semiprotectedpagewarning';
2734                         } else {
2735                                 # Then it must be protected based on static groups (regular)
2736                                 $noticeMsg = 'protectedpagewarning';
2737                         }
2738                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2739                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2740                 }
2741                 if ( $this->mTitle->isCascadeProtected() ) {
2742                         # Is this page under cascading protection from some source pages?
2743                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2744                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2745                         $cascadeSourcesCount = count( $cascadeSources );
2746                         if ( $cascadeSourcesCount > 0 ) {
2747                                 # Explain, and list the titles responsible
2748                                 foreach ( $cascadeSources as $page ) {
2749                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2750                                 }
2751                         }
2752                         $notice .= '</div>';
2753                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2754                 }
2755                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2756                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2757                                 array( 'lim' => 1,
2758                                         'showIfEmpty' => false,
2759                                         'msgKey' => array( 'titleprotectedwarning' ),
2760                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2761                 }
2762
2763                 if ( $this->kblength === false ) {
2764                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2765                 }
2766
2767                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2768                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2769                                 array(
2770                                         'longpageerror',
2771                                         $wgLang->formatNum( $this->kblength ),
2772                                         $wgLang->formatNum( $wgMaxArticleSize )
2773                                 )
2774                         );
2775                 } else {
2776                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2777                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2778                                         array(
2779                                                 'longpage-hint',
2780                                                 $wgLang->formatSize( strlen( $this->textbox1 ) ),
2781                                                 strlen( $this->textbox1 )
2782                                         )
2783                                 );
2784                         }
2785                 }
2786                 # Add header copyright warning
2787                 $this->showHeaderCopyrightWarning();
2788
2789                 return true;
2790         }
2791
2792         /**
2793          * Standard summary input and label (wgSummary), abstracted so EditPage
2794          * subclasses may reorganize the form.
2795          * Note that you do not need to worry about the label's for=, it will be
2796          * inferred by the id given to the input. You can remove them both by
2797          * passing array( 'id' => false ) to $userInputAttrs.
2798          *
2799          * @param string $summary The value of the summary input
2800          * @param string $labelText The html to place inside the label
2801          * @param array $inputAttrs Array of attrs to use on the input
2802          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
2803          *
2804          * @return array An array in the format array( $label, $input )
2805          */
2806         function getSummaryInput( $summary = "", $labelText = null,
2807                 $inputAttrs = null, $spanLabelAttrs = null
2808         ) {
2809                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
2810                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2811                         'id' => 'wpSummary',
2812                         'maxlength' => '200',
2813                         'tabindex' => '1',
2814                         'size' => 60,
2815                         'spellcheck' => 'true',
2816                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2817
2818                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2819                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2820                         'id' => "wpSummaryLabel"
2821                 );
2822
2823                 $label = null;
2824                 if ( $labelText ) {
2825                         $label = Xml::tags(
2826                                 'label',
2827                                 $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null,
2828                                 $labelText
2829                         );
2830                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2831                 }
2832
2833                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2834
2835                 return array( $label, $input );
2836         }
2837
2838         /**
2839          * @param bool $isSubjectPreview True if this is the section subject/title
2840          *   up top, or false if this is the comment summary
2841          *   down below the textarea
2842          * @param string $summary The text of the summary to display
2843          * @return string
2844          */
2845         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2846                 global $wgOut, $wgContLang;
2847                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2848                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2849                 if ( $isSubjectPreview ) {
2850                         if ( $this->nosummary ) {
2851                                 return;
2852                         }
2853                 } else {
2854                         if ( !$this->mShowSummaryField ) {
2855                                 return;
2856                         }
2857                 }
2858                 $summary = $wgContLang->recodeForEdit( $summary );
2859                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2860                 list( $label, $input ) = $this->getSummaryInput(
2861                         $summary,
2862                         $labelText,
2863                         array( 'class' => $summaryClass ),
2864                         array()
2865                 );
2866                 $wgOut->addHTML( "{$label} {$input}" );
2867         }
2868
2869         /**
2870          * @param bool $isSubjectPreview True if this is the section subject/title
2871          *   up top, or false if this is the comment summary
2872          *   down below the textarea
2873          * @param string $summary The text of the summary to display
2874          * @return string
2875          */
2876         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2877                 // avoid spaces in preview, gets always trimmed on save
2878                 $summary = trim( $summary );
2879                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
2880                         return "";
2881                 }
2882
2883                 global $wgParser;
2884
2885                 if ( $isSubjectPreview ) {
2886                         $summary = wfMessage( 'newsectionsummary' )->rawParams( $wgParser->stripSectionName( $summary ) )
2887                                 ->inContentLanguage()->text();
2888                 }
2889
2890                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2891
2892                 $summary = wfMessage( $message )->parse()
2893                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2894                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2895         }
2896
2897         protected function showFormBeforeText() {
2898                 global $wgOut;
2899                 $section = htmlspecialchars( $this->section );
2900                 $wgOut->addHTML( <<<HTML
2901 <input type='hidden' value="{$section}" name="wpSection" />
2902 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2903 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2904 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2905
2906 HTML
2907                 );
2908                 if ( !$this->checkUnicodeCompliantBrowser() ) {
2909                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2910                 }
2911         }
2912
2913         protected function showFormAfterText() {
2914                 global $wgOut, $wgUser;
2915                 /**
2916                  * To make it harder for someone to slip a user a page
2917                  * which submits an edit form to the wiki without their
2918                  * knowledge, a random token is associated with the login
2919                  * session. If it's not passed back with the submission,
2920                  * we won't save the page, or render user JavaScript and
2921                  * CSS previews.
2922                  *
2923                  * For anon editors, who may not have a session, we just
2924                  * include the constant suffix to prevent editing from
2925                  * broken text-mangling proxies.
2926                  */
2927                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2928         }
2929
2930         /**
2931          * Subpage overridable method for printing the form for page content editing
2932          * By default this simply outputs wpTextbox1
2933          * Subclasses can override this to provide a custom UI for editing;
2934          * be it a form, or simply wpTextbox1 with a modified content that will be
2935          * reverse modified when extracted from the post data.
2936          * Note that this is basically the inverse for importContentFormData
2937          */
2938         protected function showContentForm() {
2939                 $this->showTextbox1();
2940         }
2941
2942         /**
2943          * Method to output wpTextbox1
2944          * The $textoverride method can be used by subclasses overriding showContentForm
2945          * to pass back to this method.
2946          *
2947          * @param array $customAttribs Array of html attributes to use in the textarea
2948          * @param string $textoverride Optional text to override $this->textarea1 with
2949          */
2950         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2951                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2952                         $attribs = array( 'style' => 'display:none;' );
2953                 } else {
2954                         $classes = array(); // Textarea CSS
2955                         if ( $this->mTitle->isProtected( 'edit' ) &&
2956                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2957                         ) {
2958                                 # Is the title semi-protected?
2959                                 if ( $this->mTitle->isSemiProtected() ) {
2960                                         $classes[] = 'mw-textarea-sprotected';
2961                                 } else {
2962                                         # Then it must be protected based on static groups (regular)
2963                                         $classes[] = 'mw-textarea-protected';
2964                                 }
2965                                 # Is the title cascade-protected?
2966                                 if ( $this->mTitle->isCascadeProtected() ) {
2967                                         $classes[] = 'mw-textarea-cprotected';
2968                                 }
2969                         }
2970
2971                         $attribs = array( 'tabindex' => 1 );
2972
2973                         if ( is_array( $customAttribs ) ) {
2974                                 $attribs += $customAttribs;
2975                         }
2976
2977                         if ( count( $classes ) ) {
2978                                 if ( isset( $attribs['class'] ) ) {
2979                                         $classes[] = $attribs['class'];
2980                                 }
2981                                 $attribs['class'] = implode( ' ', $classes );
2982                         }
2983                 }
2984
2985                 $this->showTextbox(
2986                         $textoverride !== null ? $textoverride : $this->textbox1,
2987                         'wpTextbox1',
2988                         $attribs
2989                 );
2990         }
2991
2992         protected function showTextbox2() {
2993                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2994         }
2995
2996         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2997                 global $wgOut, $wgUser;
2998
2999                 $wikitext = $this->safeUnicodeOutput( $text );
3000                 if ( strval( $wikitext ) !== '' ) {
3001                         // Ensure there's a newline at the end, otherwise adding lines
3002                         // is awkward.
3003                         // But don't add a newline if the ext is empty, or Firefox in XHTML
3004                         // mode will show an extra newline. A bit annoying.
3005                         $wikitext .= "\n";
3006                 }
3007
3008                 $attribs = $customAttribs + array(
3009                         'accesskey' => ',',
3010                         'id' => $name,
3011                         'cols' => $wgUser->getIntOption( 'cols' ),
3012                         'rows' => $wgUser->getIntOption( 'rows' ),
3013                         // Avoid PHP notices when appending preferences
3014                         // (appending allows customAttribs['style'] to still work).
3015                         'style' => ''
3016                 );
3017
3018                 $pageLang = $this->mTitle->getPageLanguage();
3019                 $attribs['lang'] = $pageLang->getCode();
3020                 $attribs['dir'] = $pageLang->getDir();
3021
3022                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
3023         }
3024
3025         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3026                 global $wgOut;
3027                 $classes = array();
3028                 if ( $isOnTop ) {
3029                         $classes[] = 'ontop';
3030                 }
3031
3032                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
3033
3034                 if ( $this->formtype != 'preview' ) {
3035                         $attribs['style'] = 'display: none;';
3036                 }
3037
3038                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
3039
3040                 if ( $this->formtype == 'preview' ) {
3041                         $this->showPreview( $previewOutput );
3042                 }
3043
3044                 $wgOut->addHTML( '</div>' );
3045
3046                 if ( $this->formtype == 'diff' ) {
3047                         try {
3048                                 $this->showDiff();
3049                         } catch ( MWContentSerializationException $ex ) {
3050                                 $msg = wfMessage(
3051                                         'content-failed-to-parse',
3052                                         $this->contentModel,
3053                                         $this->contentFormat,
3054                                         $ex->getMessage()
3055                                 );
3056                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3057                         }
3058                 }
3059         }
3060
3061         /**
3062          * Append preview output to $wgOut.
3063          * Includes category rendering if this is a category page.
3064          *
3065          * @param string $text The HTML to be output for the preview.
3066          */
3067         protected function showPreview( $text ) {
3068                 global $wgOut;
3069                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3070                         $this->mArticle->openShowCategory();
3071                 }
3072                 # This hook seems slightly odd here, but makes things more
3073                 # consistent for extensions.
3074                 wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
3075                 $wgOut->addHTML( $text );
3076                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3077                         $this->mArticle->closeShowCategory();
3078                 }
3079         }
3080
3081         /**
3082          * Get a diff between the current contents of the edit box and the
3083          * version of the page we're editing from.
3084          *
3085          * If this is a section edit, we'll replace the section as for final
3086          * save and then make a comparison.
3087          */
3088         function showDiff() {
3089                 global $wgUser, $wgContLang, $wgOut;
3090
3091                 $oldtitlemsg = 'currentrev';
3092                 # if message does not exist, show diff against the preloaded default
3093                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3094                         $oldtext = $this->mTitle->getDefaultMessageText();
3095                         if ( $oldtext !== false ) {
3096                                 $oldtitlemsg = 'defaultmessagetext';
3097                                 $oldContent = $this->toEditContent( $oldtext );
3098                         } else {
3099                                 $oldContent = null;
3100                         }
3101                 } else {
3102                         $oldContent = $this->getCurrentContent();
3103                 }
3104
3105                 $textboxContent = $this->toEditContent( $this->textbox1 );
3106
3107                 $newContent = $this->mArticle->replaceSectionContent(
3108                                                         $this->section, $textboxContent,
3109                                                         $this->summary, $this->edittime );
3110
3111                 if ( $newContent ) {
3112                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
3113                         wfRunHooks( 'EditPageGetDiffContent', array( $this, &$newContent ) );
3114
3115                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
3116                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
3117                 }
3118
3119                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3120                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
3121                         $newtitle = wfMessage( 'yourtext' )->parse();
3122
3123                         if ( !$oldContent ) {
3124                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3125                         }
3126
3127                         if ( !$newContent ) {
3128                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3129                         }
3130
3131                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3132                         $de->setContent( $oldContent, $newContent );
3133
3134                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3135                         $de->showDiffStyle();
3136                 } else {
3137                         $difftext = '';
3138                 }
3139
3140                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3141         }
3142
3143         /**
3144          * Show the header copyright warning.
3145          */
3146         protected function showHeaderCopyrightWarning() {
3147                 $msg = 'editpage-head-copy-warn';
3148                 if ( !wfMessage( $msg )->isDisabled() ) {
3149                         global $wgOut;
3150                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3151                                 'editpage-head-copy-warn' );
3152                 }
3153         }
3154
3155         /**
3156          * Give a chance for site and per-namespace customizations of
3157          * terms of service summary link that might exist separately
3158          * from the copyright notice.
3159          *
3160          * This will display between the save button and the edit tools,
3161          * so should remain short!
3162          */
3163         protected function showTosSummary() {
3164                 $msg = 'editpage-tos-summary';
3165                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
3166                 if ( !wfMessage( $msg )->isDisabled() ) {
3167                         global $wgOut;
3168                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
3169                         $wgOut->addWikiMsg( $msg );
3170                         $wgOut->addHTML( '</div>' );
3171                 }
3172         }
3173
3174         protected function showEditTools() {
3175                 global $wgOut;
3176                 $wgOut->addHTML( '<div class="mw-editTools">' .
3177                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
3178                         '</div>' );
3179         }
3180
3181         /**
3182          * Get the copyright warning
3183          *
3184          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3185          */
3186         protected function getCopywarn() {
3187                 return self::getCopyrightWarning( $this->mTitle );
3188         }
3189
3190         /**
3191          * Get the copyright warning, by default returns wikitext
3192          *
3193          * @param Title $title
3194          * @param string $format Output format, valid values are any function of a Message object
3195          * @return string
3196          */
3197         public static function getCopyrightWarning( $title, $format = 'plain' ) {
3198                 global $wgRightsText;
3199                 if ( $wgRightsText ) {
3200                         $copywarnMsg = array( 'copyrightwarning',
3201                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3202                                 $wgRightsText );
3203                 } else {
3204                         $copywarnMsg = array( 'copyrightwarning2',
3205                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
3206                 }
3207                 // Allow for site and per-namespace customization of contribution/copyright notice.
3208                 wfRunHooks( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
3209
3210                 return "<div id=\"editpage-copywarn\">\n" .
3211                         call_user_func_array( 'wfMessage', $copywarnMsg )->$format() . "\n</div>";
3212         }
3213
3214         /**
3215          * Get the Limit report for page previews
3216          *
3217          * @since 1.22
3218          * @param ParserOutput $output ParserOutput object from the parse
3219          * @return string HTML
3220          */
3221         public static function getPreviewLimitReport( $output ) {
3222                 if ( !$output || !$output->getLimitReportData() ) {
3223                         return '';
3224                 }
3225
3226                 wfProfileIn( __METHOD__ );
3227
3228                 $limitReport = Html::rawElement( 'div', array( 'class' => 'mw-limitReportExplanation' ),
3229                         wfMessage( 'limitreport-title' )->parseAsBlock()
3230                 );
3231
3232                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3233                 $limitReport .= Html::openElement( 'div', array( 'class' => 'preview-limit-report-wrapper' ) );
3234
3235                 $limitReport .= Html::openElement( 'table', array(
3236                         'class' => 'preview-limit-report wikitable'
3237                 ) ) .
3238                         Html::openElement( 'tbody' );
3239
3240                 foreach ( $output->getLimitReportData() as $key => $value ) {
3241                         if ( wfRunHooks( 'ParserLimitReportFormat',
3242                                 array( $key, &$value, &$limitReport, true, true )
3243                         ) ) {
3244                                 $keyMsg = wfMessage( $key );
3245                                 $valueMsg = wfMessage( array( "$key-value-html", "$key-value" ) );
3246                                 if ( !$valueMsg->exists() ) {
3247                                         $valueMsg = new RawMessage( '$1' );
3248                                 }
3249                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3250                                         $limitReport .= Html::openElement( 'tr' ) .
3251                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3252                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3253                                                 Html::closeElement( 'tr' );
3254                                 }
3255                         }
3256                 }
3257
3258                 $limitReport .= Html::closeElement( 'tbody' ) .
3259                         Html::closeElement( 'table' ) .
3260                         Html::closeElement( 'div' );
3261
3262                 wfProfileOut( __METHOD__ );
3263
3264                 return $limitReport;
3265         }
3266
3267         protected function showStandardInputs( &$tabindex = 2 ) {
3268                 global $wgOut;
3269                 $wgOut->addHTML( "<div class='editOptions'>\n" );
3270
3271                 if ( $this->section != 'new' ) {
3272                         $this->showSummaryInput( false, $this->summary );
3273                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3274                 }
3275
3276                 $checkboxes = $this->getCheckboxes( $tabindex,
3277                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
3278                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
3279
3280                 // Show copyright warning.
3281                 $wgOut->addWikiText( $this->getCopywarn() );
3282                 $wgOut->addHTML( $this->editFormTextAfterWarn );
3283
3284                 $wgOut->addHTML( "<div class='editButtons'>\n" );
3285                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3286
3287                 $cancel = $this->getCancelLink();
3288                 if ( $cancel !== '' ) {
3289                         $cancel .= Html::element( 'span',
3290                                 array( 'class' => 'mw-editButtons-pipe-separator' ),
3291                                 wfMessage( 'pipe-separator' )->text() );
3292                 }
3293
3294                 $message = wfMessage( 'edithelppage' )->inContentLanguage()->text();
3295                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3296                 $edithelp = '<a target="helpwindow" href="' . $edithelpurl . '">' .
3297                         wfMessage( 'edithelp' )->escaped() . '</a> ' .
3298                         wfMessage( 'newwindow' )->parse();
3299
3300                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3301                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3302                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3303
3304                 wfRunHooks( 'EditPage::showStandardInputs:options', array( $this, $wgOut, &$tabindex ) );
3305
3306                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3307         }
3308
3309         /**
3310          * Show an edit conflict. textbox1 is already shown in showEditForm().
3311          * If you want to use another entry point to this function, be careful.
3312          */
3313         protected function showConflict() {
3314                 global $wgOut;
3315
3316                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
3317                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3318
3319                         $content1 = $this->toEditContent( $this->textbox1 );
3320                         $content2 = $this->toEditContent( $this->textbox2 );
3321
3322                         $handler = ContentHandler::getForModelID( $this->contentModel );
3323                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3324                         $de->setContent( $content2, $content1 );
3325                         $de->showDiff(
3326                                 wfMessage( 'yourtext' )->parse(),
3327                                 wfMessage( 'storedversion' )->text()
3328                         );
3329
3330                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3331                         $this->showTextbox2();
3332                 }
3333         }
3334
3335         /**
3336          * @return string
3337          */
3338         public function getCancelLink() {
3339                 $cancelParams = array();
3340                 if ( !$this->isConflict && $this->oldid > 0 ) {
3341                         $cancelParams['oldid'] = $this->oldid;
3342                 }
3343
3344                 return Linker::linkKnown(
3345                         $this->getContextTitle(),
3346                         wfMessage( 'cancel' )->parse(),
3347                         array( 'id' => 'mw-editform-cancel' ),
3348                         $cancelParams
3349                 );
3350         }
3351
3352         /**
3353          * Returns the URL to use in the form's action attribute.
3354          * This is used by EditPage subclasses when simply customizing the action
3355          * variable in the constructor is not enough. This can be used when the
3356          * EditPage lives inside of a Special page rather than a custom page action.
3357          *
3358          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3359          * @return string
3360          */
3361         protected function getActionURL( Title $title ) {
3362                 return $title->getLocalURL( array( 'action' => $this->action ) );
3363         }
3364
3365         /**
3366          * Check if a page was deleted while the user was editing it, before submit.
3367          * Note that we rely on the logging table, which hasn't been always there,
3368          * but that doesn't matter, because this only applies to brand new
3369          * deletes.
3370          * @return bool
3371          */
3372         protected function wasDeletedSinceLastEdit() {
3373                 if ( $this->deletedSinceEdit !== null ) {
3374                         return $this->deletedSinceEdit;
3375                 }
3376
3377                 $this->deletedSinceEdit = false;
3378
3379                 if ( $this->mTitle->isDeletedQuick() ) {
3380                         $this->lastDelete = $this->getLastDelete();
3381                         if ( $this->lastDelete ) {
3382                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3383                                 if ( $deleteTime > $this->starttime ) {
3384                                         $this->deletedSinceEdit = true;
3385                                 }
3386                         }
3387                 }
3388
3389                 return $this->deletedSinceEdit;
3390         }
3391
3392         /**
3393          * @return bool|stdClass
3394          */
3395         protected function getLastDelete() {
3396                 $dbr = wfGetDB( DB_SLAVE );
3397                 $data = $dbr->selectRow(
3398                         array( 'logging', 'user' ),
3399                         array(
3400                                 'log_type',
3401                                 'log_action',
3402                                 'log_timestamp',
3403                                 'log_user',
3404                                 'log_namespace',
3405                                 'log_title',
3406                                 'log_comment',
3407                                 'log_params',
3408                                 'log_deleted',
3409                                 'user_name'
3410                         ), array(
3411                                 'log_namespace' => $this->mTitle->getNamespace(),
3412                                 'log_title' => $this->mTitle->getDBkey(),
3413                                 'log_type' => 'delete',
3414                                 'log_action' => 'delete',
3415                                 'user_id=log_user'
3416                         ),
3417                         __METHOD__,
3418                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
3419                 );
3420                 // Quick paranoid permission checks...
3421                 if ( is_object( $data ) ) {
3422                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3423                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
3424                         }
3425
3426                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3427                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
3428                         }
3429                 }
3430
3431                 return $data;
3432         }
3433
3434         /**
3435          * Get the rendered text for previewing.
3436          * @throws MWException
3437          * @return string
3438          */
3439         function getPreviewText() {
3440                 global $wgOut, $wgUser, $wgRawHtml, $wgLang;
3441                 global $wgAllowUserCss, $wgAllowUserJs;
3442
3443                 wfProfileIn( __METHOD__ );
3444
3445                 if ( $wgRawHtml && !$this->mTokenOk ) {
3446                         // Could be an offsite preview attempt. This is very unsafe if
3447                         // HTML is enabled, as it could be an attack.
3448                         $parsedNote = '';
3449                         if ( $this->textbox1 !== '' ) {
3450                                 // Do not put big scary notice, if previewing the empty
3451                                 // string, which happens when you initially edit
3452                                 // a category page, due to automatic preview-on-open.
3453                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3454                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
3455                         }
3456                         wfProfileOut( __METHOD__ );
3457                         return $parsedNote;
3458                 }
3459
3460                 $note = '';
3461
3462                 try {
3463                         $content = $this->toEditContent( $this->textbox1 );
3464
3465                         $previewHTML = '';
3466                         if ( !wfRunHooks(
3467                                 'AlternateEditPreview',
3468                                 array( $this, &$content, &$previewHTML, &$this->mParserOutput ) )
3469                         ) {
3470                                 wfProfileOut( __METHOD__ );
3471                                 return $previewHTML;
3472                         }
3473
3474                         # provide a anchor link to the editform
3475                         $continueEditing = '<span class="mw-continue-editing">' .
3476                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3477                                 wfMessage( 'continue-editing' )->text() . ']]</span>';
3478                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3479                                 if ( $this->mTokenOkExceptSuffix ) {
3480                                         $note = wfMessage( 'token_suffix_mismatch' )->plain();
3481                                 } else {
3482                                         $note = wfMessage( 'session_fail_preview' )->plain();
3483                                 }
3484                         } elseif ( $this->incompleteForm ) {
3485                                 $note = wfMessage( 'edit_form_incomplete' )->plain();
3486                         } else {
3487                                 $note = wfMessage( 'previewnote' )->plain() . ' ' . $continueEditing;
3488                         }
3489
3490                         $parserOptions = $this->mArticle->makeParserOptions( $this->mArticle->getContext() );
3491                         $parserOptions->setEditSection( false );
3492                         $parserOptions->setIsPreview( true );
3493                         $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3494
3495                         # don't parse non-wikitext pages, show message about preview
3496                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3497                                 if ( $this->mTitle->isCssJsSubpage() ) {
3498                                         $level = 'user';
3499                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3500                                         $level = 'site';
3501                                 } else {
3502                                         $level = false;
3503                                 }
3504
3505                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3506                                         $format = 'css';
3507                                         if ( $level === 'user' && !$wgAllowUserCss ) {
3508                                                 $format = false;
3509                                         }
3510                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3511                                         $format = 'js';
3512                                         if ( $level === 'user' && !$wgAllowUserJs ) {
3513                                                 $format = false;
3514                                         }
3515                                 } else {
3516                                         $format = false;
3517                                 }
3518
3519                                 # Used messages to make sure grep find them:
3520                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3521                                 if ( $level && $format ) {
3522                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3523                                                 wfMessage( "{$level}{$format}preview" )->text() .
3524                                                 ' ' . $continueEditing . "</div>";
3525                                 }
3526                         }
3527
3528                         # If we're adding a comment, we need to show the
3529                         # summary as the headline
3530                         if ( $this->section === "new" && $this->summary !== "" ) {
3531                                 $content = $content->addSectionHeader( $this->summary );
3532                         }
3533
3534                         $hook_args = array( $this, &$content );
3535                         ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
3536                         wfRunHooks( 'EditPageGetPreviewContent', $hook_args );
3537
3538                         $parserOptions->enableLimitReport();
3539
3540                         # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
3541                         # But it's now deprecated, so never mind
3542
3543                         $content = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3544                         $parserOutput = $content->getParserOutput(
3545                                 $this->getArticle()->getTitle(),
3546                                 null,
3547                                 $parserOptions
3548                         );
3549
3550                         $previewHTML = $parserOutput->getText();
3551                         $this->mParserOutput = $parserOutput;
3552                         $wgOut->addParserOutputMetadata( $parserOutput );
3553
3554                         if ( count( $parserOutput->getWarnings() ) ) {
3555                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3556                         }
3557                 } catch ( MWContentSerializationException $ex ) {
3558                         $m = wfMessage(
3559                                 'content-failed-to-parse',
3560                                 $this->contentModel,
3561                                 $this->contentFormat,
3562                                 $ex->getMessage()
3563                         );
3564                         $note .= "\n\n" . $m->parse();
3565                         $previewHTML = '';
3566                 }
3567
3568                 if ( $this->isConflict ) {
3569                         $conflict = '<h2 id="mw-previewconflict">'
3570                                 . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
3571                 } else {
3572                         $conflict = '<hr />';
3573                 }
3574
3575                 $previewhead = "<div class='previewnote'>\n" .
3576                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
3577                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3578
3579                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3580                 $attribs = array( 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3581                         'class' => 'mw-content-' . $pageViewLang->getDir() );
3582                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3583
3584                 wfProfileOut( __METHOD__ );
3585                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3586         }
3587
3588         /**
3589          * @return array
3590          */
3591         function getTemplates() {
3592                 if ( $this->preview || $this->section != '' ) {
3593                         $templates = array();
3594                         if ( !isset( $this->mParserOutput ) ) {
3595                                 return $templates;
3596                         }
3597                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3598                                 foreach ( array_keys( $template ) as $dbk ) {
3599                                         $templates[] = Title::makeTitle( $ns, $dbk );
3600                                 }
3601                         }
3602                         return $templates;
3603                 } else {
3604                         return $this->mTitle->getTemplateLinksFrom();
3605                 }
3606         }
3607
3608         /**
3609          * Shows a bulletin board style toolbar for common editing functions.
3610          * It can be disabled in the user preferences.
3611          * The necessary JavaScript code can be found in skins/common/edit.js.
3612          *
3613          * @return string
3614          */
3615         static function getEditToolbar() {
3616                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
3617                 global $wgEnableUploads, $wgForeignFileRepos;
3618
3619                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3620
3621                 /**
3622                  * $toolarray is an array of arrays each of which includes the
3623                  * filename of the button image (without path), the opening
3624                  * tag, the closing tag, optionally a sample text that is
3625                  * inserted between the two when no selection is highlighted
3626                  * and.  The tip text is shown when the user moves the mouse
3627                  * over the button.
3628                  *
3629                  * Also here: accesskeys (key), which are not used yet until
3630                  * someone can figure out a way to make them work in
3631                  * IE. However, we should make sure these keys are not defined
3632                  * on the edit page.
3633                  */
3634                 $toolarray = array(
3635                         array(
3636                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
3637                                 'id'     => 'mw-editbutton-bold',
3638                                 'open'   => '\'\'\'',
3639                                 'close'  => '\'\'\'',
3640                                 'sample' => wfMessage( 'bold_sample' )->text(),
3641                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3642                                 'key'    => 'B'
3643                         ),
3644                         array(
3645                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
3646                                 'id'     => 'mw-editbutton-italic',
3647                                 'open'   => '\'\'',
3648                                 'close'  => '\'\'',
3649                                 'sample' => wfMessage( 'italic_sample' )->text(),
3650                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3651                                 'key'    => 'I'
3652                         ),
3653                         array(
3654                                 'image'  => $wgLang->getImageFile( 'button-link' ),
3655                                 'id'     => 'mw-editbutton-link',
3656                                 'open'   => '[[',
3657                                 'close'  => ']]',
3658                                 'sample' => wfMessage( 'link_sample' )->text(),
3659                                 'tip'    => wfMessage( 'link_tip' )->text(),
3660                                 'key'    => 'L'
3661                         ),
3662                         array(
3663                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
3664                                 'id'     => 'mw-editbutton-extlink',
3665                                 'open'   => '[',
3666                                 'close'  => ']',
3667                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3668                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3669                                 'key'    => 'X'
3670                         ),
3671                         array(
3672                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
3673                                 'id'     => 'mw-editbutton-headline',
3674                                 'open'   => "\n== ",
3675                                 'close'  => " ==\n",
3676                                 'sample' => wfMessage( 'headline_sample' )->text(),
3677                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3678                                 'key'    => 'H'
3679                         ),
3680                         $imagesAvailable ? array(
3681                                 'image'  => $wgLang->getImageFile( 'button-image' ),
3682                                 'id'     => 'mw-editbutton-image',
3683                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3684                                 'close'  => ']]',
3685                                 'sample' => wfMessage( 'image_sample' )->text(),
3686                                 'tip'    => wfMessage( 'image_tip' )->text(),
3687                                 'key'    => 'D',
3688                         ) : false,
3689                         $imagesAvailable ? array(
3690                                 'image'  => $wgLang->getImageFile( 'button-media' ),
3691                                 'id'     => 'mw-editbutton-media',
3692                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3693                                 'close'  => ']]',
3694                                 'sample' => wfMessage( 'media_sample' )->text(),
3695                                 'tip'    => wfMessage( 'media_tip' )->text(),
3696                                 'key'    => 'M'
3697                         ) : false,
3698                         array(
3699                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
3700                                 'id'     => 'mw-editbutton-nowiki',
3701                                 'open'   => "<nowiki>",
3702                                 'close'  => "</nowiki>",
3703                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3704                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3705                                 'key'    => 'N'
3706                         ),
3707                         array(
3708                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
3709                                 'id'     => 'mw-editbutton-signature',
3710                                 'open'   => '--~~~~',
3711                                 'close'  => '',
3712                                 'sample' => '',
3713                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3714                                 'key'    => 'Y'
3715                         ),
3716                         array(
3717                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
3718                                 'id'     => 'mw-editbutton-hr',
3719                                 'open'   => "\n----\n",
3720                                 'close'  => '',
3721                                 'sample' => '',
3722                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3723                                 'key'    => 'R'
3724                         )
3725                 );
3726
3727                 $script = 'mw.loader.using("mediawiki.action.edit", function() {';
3728                 foreach ( $toolarray as $tool ) {
3729                         if ( !$tool ) {
3730                                 continue;
3731                         }
3732
3733                         $params = array(
3734                                 $wgStylePath . '/common/images/' . $tool['image'],
3735                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3736                                 // Older browsers show a "speedtip" type message only for ALT.
3737                                 // Ideally these should be different, realistically they
3738                                 // probably don't need to be.
3739                                 $tool['tip'],
3740                                 $tool['open'],
3741                                 $tool['close'],
3742                                 $tool['sample'],
3743                                 $tool['id'],
3744                         );
3745
3746                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
3747                 }
3748
3749                 // This used to be called on DOMReady from mediawiki.action.edit, which
3750                 // ended up causing race conditions with the setup code above.
3751                 $script .= "\n" .
3752                         "// Create button bar\n" .
3753                         "$(function() { mw.toolbar.init(); } );\n";
3754
3755                 $script .= '});';
3756                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3757
3758                 $toolbar = '<div id="toolbar"></div>';
3759
3760                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3761
3762                 return $toolbar;
3763         }
3764
3765         /**
3766          * Returns an array of html code of the following checkboxes:
3767          * minor and watch
3768          *
3769          * @param int $tabindex Current tabindex
3770          * @param array $checked Array of checkbox => bool, where bool indicates the checked
3771          *                 status of the checkbox
3772          *
3773          * @return array
3774          */
3775         public function getCheckboxes( &$tabindex, $checked ) {
3776                 global $wgUser;
3777
3778                 $checkboxes = array();
3779
3780                 // don't show the minor edit checkbox if it's a new page or section
3781                 if ( !$this->isNew ) {
3782                         $checkboxes['minor'] = '';
3783                         $minorLabel = wfMessage( 'minoredit' )->parse();
3784                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3785                                 $attribs = array(
3786                                         'tabindex' => ++$tabindex,
3787                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3788                                         'id' => 'wpMinoredit',
3789                                 );
3790                                 $checkboxes['minor'] =
3791                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3792                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3793                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3794                                         ">{$minorLabel}</label>";
3795                         }
3796                 }
3797
3798                 $watchLabel = wfMessage( 'watchthis' )->parse();
3799                 $checkboxes['watch'] = '';
3800                 if ( $wgUser->isLoggedIn() ) {
3801                         $attribs = array(
3802                                 'tabindex' => ++$tabindex,
3803                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3804                                 'id' => 'wpWatchthis',
3805                         );
3806                         $checkboxes['watch'] =
3807                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3808                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3809                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3810                                 ">{$watchLabel}</label>";
3811                 }
3812                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3813                 return $checkboxes;
3814         }
3815
3816         /**
3817          * Returns an array of html code of the following buttons:
3818          * save, diff, preview and live
3819          *
3820          * @param int $tabindex Current tabindex
3821          *
3822          * @return array
3823          */
3824         public function getEditButtons( &$tabindex ) {
3825                 $buttons = array();
3826
3827                 $attribs = array(
3828                         'id' => 'wpSave',
3829                         'name' => 'wpSave',
3830                         'type' => 'submit',
3831                         'tabindex' => ++$tabindex,
3832                         'value' => wfMessage( 'savearticle' )->text(),
3833                 ) + Linker::tooltipAndAccesskeyAttribs( 'save' );
3834                 $buttons['save'] = Xml::element( 'input', $attribs, '' );
3835
3836                 ++$tabindex; // use the same for preview and live preview
3837                 $attribs = array(
3838                         'id' => 'wpPreview',
3839                         'name' => 'wpPreview',
3840                         'type' => 'submit',
3841                         'tabindex' => $tabindex,
3842                         'value' => wfMessage( 'showpreview' )->text(),
3843                 ) + Linker::tooltipAndAccesskeyAttribs( 'preview' );
3844                 $buttons['preview'] = Xml::element( 'input', $attribs, '' );
3845                 $buttons['live'] = '';
3846
3847                 $attribs = array(
3848                         'id' => 'wpDiff',
3849                         'name' => 'wpDiff',
3850                         'type' => 'submit',
3851                         'tabindex' => ++$tabindex,
3852                         'value' => wfMessage( 'showdiff' )->text(),
3853                 ) + Linker::tooltipAndAccesskeyAttribs( 'diff' );
3854                 $buttons['diff'] = Xml::element( 'input', $attribs, '' );
3855
3856                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3857                 return $buttons;
3858         }
3859
3860         /**
3861          * Output preview text only. This can be sucked into the edit page
3862          * via JavaScript, and saves the server time rendering the skin as
3863          * well as theoretically being more robust on the client (doesn't
3864          * disturb the edit box's undo history, won't eat your text on
3865          * failure, etc).
3866          *
3867          * @todo This doesn't include category or interlanguage links.
3868          *       Would need to enhance it a bit, "<s>maybe wrap them in XML
3869          *       or something...</s>" that might also require more skin
3870          *       initialization, so check whether that's a problem.
3871          */
3872         function livePreview() {
3873                 global $wgOut;
3874                 $wgOut->disable();
3875                 header( 'Content-type: text/xml; charset=utf-8' );
3876                 header( 'Cache-control: no-cache' );
3877
3878                 $previewText = $this->getPreviewText();
3879                 #$categories = $skin->getCategoryLinks();
3880
3881                 $s =
3882                         '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3883                         Xml::tags( 'livepreview', null,
3884                                 Xml::element( 'preview', null, $previewText )
3885                                 #.      Xml::element( 'category', null, $categories )
3886                         );
3887                 echo $s;
3888         }
3889
3890         /**
3891          * Call the stock "user is blocked" page
3892          *
3893          * @deprecated since 1.19; throw an exception directly instead
3894          */
3895         function blockedPage() {
3896                 wfDeprecated( __METHOD__, '1.19' );
3897                 global $wgUser;
3898
3899                 throw new UserBlockedError( $wgUser->getBlock() );
3900         }
3901
3902         /**
3903          * Produce the stock "please login to edit pages" page
3904          *
3905          * @deprecated since 1.19; throw an exception directly instead
3906          */
3907         function userNotLoggedInPage() {
3908                 wfDeprecated( __METHOD__, '1.19' );
3909                 throw new PermissionsError( 'edit' );
3910         }
3911
3912         /**
3913          * Show an error page saying to the user that he has insufficient permissions
3914          * to create a new page
3915          *
3916          * @deprecated since 1.19; throw an exception directly instead
3917          */
3918         function noCreatePermission() {
3919                 wfDeprecated( __METHOD__, '1.19' );
3920                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
3921                 throw new PermissionsError( $permission );
3922         }
3923
3924         /**
3925          * Creates a basic error page which informs the user that
3926          * they have attempted to edit a nonexistent section.
3927          */
3928         function noSuchSectionPage() {
3929                 global $wgOut;
3930
3931                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3932
3933                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
3934                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
3935                 $wgOut->addHTML( $res );
3936
3937                 $wgOut->returnToMain( false, $this->mTitle );
3938         }
3939
3940         /**
3941          * Show "your edit contains spam" page with your diff and text
3942          *
3943          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
3944          */
3945         public function spamPageWithContent( $match = false ) {
3946                 global $wgOut, $wgLang;
3947                 $this->textbox2 = $this->textbox1;
3948
3949                 if ( is_array( $match ) ) {
3950                         $match = $wgLang->listToText( $match );
3951                 }
3952                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3953
3954                 $wgOut->addHTML( '<div id="spamprotected">' );
3955                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3956                 if ( $match ) {
3957                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3958                 }
3959                 $wgOut->addHTML( '</div>' );
3960
3961                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3962                 $this->showDiff();
3963
3964                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3965                 $this->showTextbox2();
3966
3967                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3968         }
3969
3970         /**
3971          * Check if the browser is on a blacklist of user-agents known to
3972          * mangle UTF-8 data on form submission. Returns true if Unicode
3973          * should make it through, false if it's known to be a problem.
3974          * @return bool
3975          */
3976         private function checkUnicodeCompliantBrowser() {
3977                 global $wgBrowserBlackList, $wgRequest;
3978
3979                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
3980                 if ( $currentbrowser === false ) {
3981                         // No User-Agent header sent? Trust it by default...
3982                         return true;
3983                 }
3984
3985                 foreach ( $wgBrowserBlackList as $browser ) {
3986                         if ( preg_match( $browser, $currentbrowser ) ) {
3987                                 return false;
3988                         }
3989                 }
3990                 return true;
3991         }
3992
3993         /**
3994          * Filter an input field through a Unicode de-armoring process if it
3995          * came from an old browser with known broken Unicode editing issues.
3996          *
3997          * @param WebRequest $request
3998          * @param string $field
3999          * @return string
4000          */
4001         protected function safeUnicodeInput( $request, $field ) {
4002                 $text = rtrim( $request->getText( $field ) );
4003                 return $request->getBool( 'safemode' )
4004                         ? $this->unmakeSafe( $text )
4005                         : $text;
4006         }
4007
4008         /**
4009          * Filter an output field through a Unicode armoring process if it is
4010          * going to an old browser with known broken Unicode editing issues.
4011          *
4012          * @param string $text
4013          * @return string
4014          */
4015         protected function safeUnicodeOutput( $text ) {
4016                 global $wgContLang;
4017                 $codedText = $wgContLang->recodeForEdit( $text );
4018                 return $this->checkUnicodeCompliantBrowser()
4019                         ? $codedText
4020                         : $this->makeSafe( $codedText );
4021         }
4022
4023         /**
4024          * A number of web browsers are known to corrupt non-ASCII characters
4025          * in a UTF-8 text editing environment. To protect against this,
4026          * detected browsers will be served an armored version of the text,
4027          * with non-ASCII chars converted to numeric HTML character references.
4028          *
4029          * Preexisting such character references will have a 0 added to them
4030          * to ensure that round-trips do not alter the original data.
4031          *
4032          * @param string $invalue
4033          * @return string
4034          */
4035         private function makeSafe( $invalue ) {
4036                 // Armor existing references for reversibility.
4037                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
4038
4039                 $bytesleft = 0;
4040                 $result = "";
4041                 $working = 0;
4042                 $valueLength = strlen( $invalue );
4043                 for ( $i = 0; $i < $valueLength; $i++ ) {
4044                         $bytevalue = ord( $invalue[$i] );
4045                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
4046                                 $result .= chr( $bytevalue );
4047                                 $bytesleft = 0;
4048                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
4049                                 $working = $working << 6;
4050                                 $working += ( $bytevalue & 0x3F );
4051                                 $bytesleft--;
4052                                 if ( $bytesleft <= 0 ) {
4053                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
4054                                 }
4055                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
4056                                 $working = $bytevalue & 0x1F;
4057                                 $bytesleft = 1;
4058                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
4059                                 $working = $bytevalue & 0x0F;
4060                                 $bytesleft = 2;
4061                         } else { // 1111 0xxx
4062                                 $working = $bytevalue & 0x07;
4063                                 $bytesleft = 3;
4064                         }
4065                 }
4066                 return $result;
4067         }
4068
4069         /**
4070          * Reverse the previously applied transliteration of non-ASCII characters
4071          * back to UTF-8. Used to protect data from corruption by broken web browsers
4072          * as listed in $wgBrowserBlackList.
4073          *
4074          * @param string $invalue
4075          * @return string
4076          */
4077         private function unmakeSafe( $invalue ) {
4078                 $result = "";
4079                 $valueLength = strlen( $invalue );
4080                 for ( $i = 0; $i < $valueLength; $i++ ) {
4081                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
4082                                 $i += 3;
4083                                 $hexstring = "";
4084                                 do {
4085                                         $hexstring .= $invalue[$i];
4086                                         $i++;
4087                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
4088
4089                                 // Do some sanity checks. These aren't needed for reversibility,
4090                                 // but should help keep the breakage down if the editor
4091                                 // breaks one of the entities whilst editing.
4092                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) and ( strlen( $hexstring ) <= 6 ) ) {
4093                                         $codepoint = hexdec( $hexstring );
4094                                         $result .= codepointToUtf8( $codepoint );
4095                                 } else {
4096                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
4097                                 }
4098                         } else {
4099                                 $result .= substr( $invalue, $i, 1 );
4100                         }
4101                 }
4102                 // reverse the transform that we made for reversibility reasons.
4103                 return strtr( $result, array( "&#x0" => "&#x" ) );
4104         }
4105 }