includes/EditPage.php

   1 <?php
   2 /**
   3  * Page edition user interface.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * The edit page/HTML interface (split from Article)
  25  * The actual database and text munging is still in Article,
  26  * but it should get easier to call those from alternate
  27  * interfaces.
  28  *
  29  * EditPage cares about two distinct titles:
  30  * $this->mContextTitle is the page that forms submit to, links point to,
  31  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  32  * page in the database that is actually being edited. These are
  33  * usually the same, but they are now allowed to be different.
  34  *
  35  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  36  * headaches, which may be fatal.
  37  */
  38 class EditPage {
  39
  40         /**
  41          * Status: Article successfully updated
  42          */
  43         const AS_SUCCESS_UPDATE = 200;
  44
  45         /**
  46          * Status: Article successfully created
  47          */
  48         const AS_SUCCESS_NEW_ARTICLE = 201;
  49
  50         /**
  51          * Status: Article update aborted by a hook function
  52          */
  53         const AS_HOOK_ERROR = 210;
  54
  55         /**
  56          * Status: A hook function returned an error
  57          */
  58         const AS_HOOK_ERROR_EXPECTED = 212;
  59
  60         /**
  61          * Status: User is blocked from editting this page
  62          */
  63         const AS_BLOCKED_PAGE_FOR_USER = 215;
  64
  65         /**
  66          * Status: Content too big (> $wgMaxArticleSize)
  67          */
  68         const AS_CONTENT_TOO_BIG = 216;
  69
  70         /**
  71          * Status: User cannot edit? (not used)
  72          */
  73         const AS_USER_CANNOT_EDIT = 217;
  74
  75         /**
  76          * Status: this anonymous user is not allowed to edit this page
  77          */
  78         const AS_READ_ONLY_PAGE_ANON = 218;
  79
  80         /**
  81          * Status: this logged in user is not allowed to edit this page
  82          */
  83         const AS_READ_ONLY_PAGE_LOGGED = 219;
  84
  85         /**
  86          * Status: wiki is in readonly mode (wfReadOnly() == true)
  87          */
  88         const AS_READ_ONLY_PAGE = 220;
  89
  90         /**
  91          * Status: rate limiter for action 'edit' was tripped
  92          */
  93         const AS_RATE_LIMITED = 221;
  94
  95         /**
  96          * Status: article was deleted while editting and param wpRecreate == false or form
  97          * was not posted
  98          */
  99         const AS_ARTICLE_WAS_DELETED = 222;
 100
 101         /**
 102          * Status: user tried to create this page, but is not allowed to do that
 103          * ( Title->usercan('create') == false )
 104          */
 105         const AS_NO_CREATE_PERMISSION = 223;
 106
 107         /**
 108          * Status: user tried to create a blank page
 109          */
 110         const AS_BLANK_ARTICLE = 224;
 111
 112         /**
 113          * Status: (non-resolvable) edit conflict
 114          */
 115         const AS_CONFLICT_DETECTED = 225;
 116
 117         /**
 118          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 119          * editting in his own userspace or talkspace and wpIgnoreBlankSummary == false
 120          */
 121         const AS_SUMMARY_NEEDED = 226;
 122
 123         /**
 124          * Status: user tried to create a new section without content
 125          */
 126         const AS_TEXTBOX_EMPTY = 228;
 127
 128         /**
 129          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 130          */
 131         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 132
 133         /**
 134          * not used
 135          */
 136         const AS_OK = 230;
 137
 138         /**
 139          * Status: WikiPage::doEdit() was unsuccessfull
 140          */
 141         const AS_END = 231;
 142
 143         /**
 144          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 145          */
 146         const AS_SPAM_ERROR = 232;
 147
 148         /**
 149          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 150          */
 151         const AS_IMAGE_REDIRECT_ANON = 233;
 152
 153         /**
 154          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 155          */
 156         const AS_IMAGE_REDIRECT_LOGGED = 234;
 157
 158         /**
 159          * Status: can't parse content
 160          */
 161         const AS_PARSE_ERROR = 240;
 162
 163         /**
 164          * HTML id and name for the beginning of the edit form.
 165          */
 166         const EDITFORM_ID = 'editform';
 167
 168         /**
 169          * Prefix of key for cookie used to pass post-edit state.
 170          * The revision id edited is added after this
 171          */
 172         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 173
 174         /**
 175          * Duration of PostEdit cookie, in seconds.
 176          * The cookie will be removed instantly if the JavaScript runs.
 177          *
 178          * Otherwise, though, we don't want the cookies to accumulate.
 179          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible limit of only 20 cookies per domain.
 180          * This still applies at least to some versions of IE without full updates:
 181          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 182          *
 183          * A value of 20 minutes should be enough to take into account slow loads and minor
 184          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 185          */
 186         const POST_EDIT_COOKIE_DURATION = 1200;
 187
 188         /**
 189          * @var Article
 190          */
 191         var $mArticle;
 192
 193         /**
 194          * @var Title
 195          */
 196         var $mTitle;
 197         private $mContextTitle = null;
 198         var $action = 'submit';
 199         var $isConflict = false;
 200         var $isCssJsSubpage = false;
 201         var $isCssSubpage = false;
 202         var $isJsSubpage = false;
 203         var $isWrongCaseCssJsPage = false;
 204         var $isNew = false; // new page or new section
 205         var $deletedSinceEdit;
 206         var $formtype;
 207         var $firsttime;
 208         var $lastDelete;
 209         var $mTokenOk = false;
 210         var $mTokenOkExceptSuffix = false;
 211         var $mTriedSave = false;
 212         var $incompleteForm = false;
 213         var $tooBig = false;
 214         var $kblength = false;
 215         var $missingComment = false;
 216         var $missingSummary = false;
 217         var $allowBlankSummary = false;
 218         var $autoSumm = '';
 219         var $hookError = '';
 220         #var $mPreviewTemplates;
 221
 222         /**
 223          * @var ParserOutput
 224          */
 225         var $mParserOutput;
 226
 227         /**
 228          * Has a summary been preset using GET parameter &summary= ?
 229          * @var Bool
 230          */
 231         var $hasPresetSummary = false;
 232
 233         var $mBaseRevision = false;
 234         var $mShowSummaryField = true;
 235
 236         # Form values
 237         var $save = false, $preview = false, $diff = false;
 238         var $minoredit = false, $watchthis = false, $recreate = false;
 239         var $textbox1 = '', $textbox2 = '', $summary = '', $nosummary = false;
 240         var $edittime = '', $section = '', $sectiontitle = '', $starttime = '';
 241         var $oldid = 0, $editintro = '', $scrolltop = null, $bot = true;
 242         var $contentModel = null, $contentFormat = null;
 243
 244         # Placeholders for text injection by hooks (must be HTML)
 245         # extensions should take care to _append_ to the present value
 246         public $editFormPageTop = ''; // Before even the preview
 247         public $editFormTextTop = '';
 248         public $editFormTextBeforeContent = '';
 249         public $editFormTextAfterWarn = '';
 250         public $editFormTextAfterTools = '';
 251         public $editFormTextBottom = '';
 252         public $editFormTextAfterContent = '';
 253         public $previewTextAfterContent = '';
 254         public $mPreloadContent = null;
 255
 256         /* $didSave should be set to true whenever an article was succesfully altered. */
 257         public $didSave = false;
 258         public $undidRev = 0;
 259
 260         public $suppressIntro = false;
 261
 262         /**
 263          * Set to true to allow editing of non-text content types.
 264          *
 265          * @var bool
 266          */
 267         public $allowNonTextContent = false;
 268
 269         /**
 270          * @param $article Article
 271          */
 272         public function __construct( Article $article ) {
 273                 $this->mArticle = $article;
 274                 $this->mTitle = $article->getTitle();
 275
 276                 $this->contentModel = $this->mTitle->getContentModel();
 277
 278                 $handler = ContentHandler::getForModelID( $this->contentModel );
 279                 $this->contentFormat = $handler->getDefaultFormat();
 280         }
 281
 282         /**
 283          * @return Article
 284          */
 285         public function getArticle() {
 286                 return $this->mArticle;
 287         }
 288
 289         /**
 290          * @since 1.19
 291          * @return Title
 292          */
 293         public function getTitle() {
 294                 return $this->mTitle;
 295         }
 296
 297         /**
 298          * Set the context Title object
 299          *
 300          * @param $title Title object or null
 301          */
 302         public function setContextTitle( $title ) {
 303                 $this->mContextTitle = $title;
 304         }
 305
 306         /**
 307          * Get the context title object.
 308          * If not set, $wgTitle will be returned. This behavior might change in
 309          * the future to return $this->mTitle instead.
 310          *
 311          * @return Title object
 312          */
 313         public function getContextTitle() {
 314                 if ( is_null( $this->mContextTitle ) ) {
 315                         global $wgTitle;
 316                         return $wgTitle;
 317                 } else {
 318                         return $this->mContextTitle;
 319                 }
 320         }
 321
 322         function submit() {
 323                 $this->edit();
 324         }
 325
 326         /**
 327          * This is the function that gets called for "action=edit". It
 328          * sets up various member variables, then passes execution to
 329          * another function, usually showEditForm()
 330          *
 331          * The edit form is self-submitting, so that when things like
 332          * preview and edit conflicts occur, we get the same form back
 333          * with the extra stuff added.  Only when the final submission
 334          * is made and all is well do we actually save and redirect to
 335          * the newly-edited page.
 336          */
 337         function edit() {
 338                 global $wgOut, $wgRequest, $wgUser;
 339                 // Allow extensions to modify/prevent this form or submission
 340                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 341                         return;
 342                 }
 343
 344                 wfProfileIn( __METHOD__ );
 345                 wfDebug( __METHOD__ . ": enter\n" );
 346
 347                 // If they used redlink=1 and the page exists, redirect to the main article
 348                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 349                         $wgOut->redirect( $this->mTitle->getFullURL() );
 350                         wfProfileOut( __METHOD__ );
 351                         return;
 352                 }
 353
 354                 $this->importFormData( $wgRequest );
 355                 $this->firsttime = false;
 356
 357                 if ( $this->live ) {
 358                         $this->livePreview();
 359                         wfProfileOut( __METHOD__ );
 360                         return;
 361                 }
 362
 363                 if ( wfReadOnly() && $this->save ) {
 364                         // Force preview
 365                         $this->save = false;
 366                         $this->preview = true;
 367                 }
 368
 369                 if ( $this->save ) {
 370                         $this->formtype = 'save';
 371                 } elseif ( $this->preview ) {
 372                         $this->formtype = 'preview';
 373                 } elseif ( $this->diff ) {
 374                         $this->formtype = 'diff';
 375                 } else { # First time through
 376                         $this->firsttime = true;
 377                         if ( $this->previewOnOpen() ) {
 378                                 $this->formtype = 'preview';
 379                         } else {
 380                                 $this->formtype = 'initial';
 381                         }
 382                 }
 383
 384                 $permErrors = $this->getEditPermissionErrors();
 385                 if ( $permErrors ) {
 386                         wfDebug( __METHOD__ . ": User can't edit\n" );
 387                         // Auto-block user's IP if the account was "hard" blocked
 388                         $wgUser->spreadAnyEditBlock();
 389
 390                         $this->displayPermissionsError( $permErrors );
 391
 392                         wfProfileOut( __METHOD__ );
 393                         return;
 394                 }
 395
 396                 wfProfileIn( __METHOD__ . "-business-end" );
 397
 398                 $this->isConflict = false;
 399                 // css / js subpages of user pages get a special treatment
 400                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 401                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 402                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 403                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 404
 405                 # Show applicable editing introductions
 406                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 407                         $this->showIntro();
 408                 }
 409
 410                 # Attempt submission here.  This will check for edit conflicts,
 411                 # and redundantly check for locked database, blocked IPs, etc.
 412                 # that edit() already checked just in case someone tries to sneak
 413                 # in the back door with a hand-edited submission URL.
 414
 415                 if ( 'save' == $this->formtype ) {
 416                         if ( !$this->attemptSave() ) {
 417                                 wfProfileOut( __METHOD__ . "-business-end" );
 418                                 wfProfileOut( __METHOD__ );
 419                                 return;
 420                         }
 421                 }
 422
 423                 # First time through: get contents, set time for conflict
 424                 # checking, etc.
 425                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 426                         if ( $this->initialiseForm() === false ) {
 427                                 $this->noSuchSectionPage();
 428                                 wfProfileOut( __METHOD__ . "-business-end" );
 429                                 wfProfileOut( __METHOD__ );
 430                                 return;
 431                         }
 432
 433                         if ( !$this->mTitle->getArticleID() ) {
 434                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 435                         } else {
 436                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 437                         }
 438
 439                 }
 440
 441                 $this->showEditForm();
 442                 wfProfileOut( __METHOD__ . "-business-end" );
 443                 wfProfileOut( __METHOD__ );
 444         }
 445
 446         /**
 447          * @return array
 448          */
 449         protected function getEditPermissionErrors() {
 450                 global $wgUser;
 451                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 452                 # Can this title be created?
 453                 if ( !$this->mTitle->exists() ) {
 454                         $permErrors = array_merge( $permErrors,
 455                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 456                 }
 457                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 458                 $remove = array();
 459                 foreach ( $permErrors as $error ) {
 460                         if ( ( $this->preview || $this->diff ) &&
 461                                 ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' ) )
 462                         {
 463                                 $remove[] = $error;
 464                         }
 465                 }
 466                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 467                 return $permErrors;
 468         }
 469
 470         /**
 471          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 472          * but with the following differences:
 473          * - If redlink=1, the user will be redirected to the page
 474          * - If there is content to display or the error occurs while either saving,
 475          *   previewing or showing the difference, it will be a
 476          *   "View source for ..." page displaying the source code after the error message.
 477          *
 478          * @since 1.19
 479          * @param $permErrors Array of permissions errors, as returned by
 480          *                    Title::getUserPermissionsErrors().
 481          * @throws PermissionsError
 482          */
 483         protected function displayPermissionsError( array $permErrors ) {
 484                 global $wgRequest, $wgOut;
 485
 486                 if ( $wgRequest->getBool( 'redlink' ) ) {
 487                         // The edit page was reached via a red link.
 488                         // Redirect to the article page and let them click the edit tab if
 489                         // they really want a permission error.
 490                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 491                         return;
 492                 }
 493
 494                 $content = $this->getContentObject();
 495
 496                 # Use the normal message if there's nothing to display
 497                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 498                         $action = $this->mTitle->exists() ? 'edit' :
 499                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 500                         throw new PermissionsError( $action, $permErrors );
 501                 }
 502
 503                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 504                 $wgOut->setPageTitle( wfMessage( 'viewsource-title', $this->getContextTitle()->getPrefixedText() ) );
 505                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 506                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 507                 $wgOut->addHTML( "<hr />\n" );
 508
 509                 # If the user made changes, preserve them when showing the markup
 510                 # (This happens when a user is blocked during edit, for instance)
 511                 if ( !$this->firsttime ) {
 512                         $text = $this->textbox1;
 513                         $wgOut->addWikiMsg( 'viewyourtext' );
 514                 } else {
 515                         $text = $this->toEditText( $content );
 516                         $wgOut->addWikiMsg( 'viewsourcetext' );
 517                 }
 518
 519                 $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 520
 521                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 522                         Linker::formatTemplates( $this->getTemplates() ) ) );
 523
 524                 if ( $this->mTitle->exists() ) {
 525                         $wgOut->returnToMain( null, $this->mTitle );
 526                 }
 527         }
 528
 529         /**
 530          * Show a read-only error
 531          * Parameters are the same as OutputPage:readOnlyPage()
 532          * Redirect to the article page if redlink=1
 533          * @deprecated in 1.19; use displayPermissionsError() instead
 534          */
 535         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 536                 wfDeprecated( __METHOD__, '1.19' );
 537
 538                 global $wgRequest, $wgOut;
 539                 if ( $wgRequest->getBool( 'redlink' ) ) {
 540                         // The edit page was reached via a red link.
 541                         // Redirect to the article page and let them click the edit tab if
 542                         // they really want a permission error.
 543                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 544                 } else {
 545                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 546                 }
 547         }
 548
 549         /**
 550          * Should we show a preview when the edit form is first shown?
 551          *
 552          * @return bool
 553          */
 554         protected function previewOnOpen() {
 555                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 556                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 557                         // Explicit override from request
 558                         return true;
 559                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 560                         // Explicit override from request
 561                         return false;
 562                 } elseif ( $this->section == 'new' ) {
 563                         // Nothing *to* preview for new sections
 564                         return false;
 565                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 566                         // Standard preference behavior
 567                         return true;
 568                 } elseif ( !$this->mTitle->exists() &&
 569                         isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] ) &&
 570                         $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 571                 {
 572                         // Categories are special
 573                         return true;
 574                 } else {
 575                         return false;
 576                 }
 577         }
 578
 579         /**
 580          * Checks whether the user entered a skin name in uppercase,
 581          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 582          *
 583          * @return bool
 584          */
 585         protected function isWrongCaseCssJsPage() {
 586                 if ( $this->mTitle->isCssJsSubpage() ) {
 587                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 588                         $skins = array_merge(
 589                                 array_keys( Skin::getSkinNames() ),
 590                                 array( 'common' )
 591                         );
 592                         return !in_array( $name, $skins )
 593                                 && in_array( strtolower( $name ), $skins );
 594                 } else {
 595                         return false;
 596                 }
 597         }
 598
 599         /**
 600          * Returns whether section editing is supported for the current page.
 601          * Subclasses may override this to replace the default behavior, which is
 602          * to check ContentHandler::supportsSections.
 603          *
 604          * @return bool true if this edit page supports sections, false otherwise.
 605          */
 606         protected function isSectionEditSupported() {
 607                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 608                 return $contentHandler->supportsSections();
 609         }
 610
 611         /**
 612          * This function collects the form data and uses it to populate various member variables.
 613          * @param $request WebRequest
 614          */
 615         function importFormData( &$request ) {
 616                 global $wgContLang, $wgUser;
 617
 618                 wfProfileIn( __METHOD__ );
 619
 620                 # Section edit can come from either the form or a link
 621                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 622
 623                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 624                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 625                 }
 626
 627                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 628
 629                 if ( $request->wasPosted() ) {
 630                         # These fields need to be checked for encoding.
 631                         # Also remove trailing whitespace, but don't remove _initial_
 632                         # whitespace from the text boxes. This may be significant formatting.
 633                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 634                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 635                                 // Skip this if wpTextbox2 has input, it indicates that we came
 636                                 // from a conflict page with raw page text, not a custom form
 637                                 // modified by subclasses
 638                                 wfProfileIn( get_class( $this ) . "::importContentFormData" );
 639                                 $textbox1 = $this->importContentFormData( $request );
 640                                 if ( $textbox1 !== null ) {
 641                                         $this->textbox1 = $textbox1;
 642                                 }
 643
 644                                 wfProfileOut( get_class( $this ) . "::importContentFormData" );
 645                         }
 646
 647                         # Truncate for whole multibyte characters
 648                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 649
 650                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 651                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 652                         # section titles.
 653                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 654
 655                         # Treat sectiontitle the same way as summary.
 656                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 657                         # currently doing double duty as both edit summary and section title. Right now this
 658                         # is just to allow API edits to work around this limitation, but this should be
 659                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 660                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 661                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 662
 663                         $this->edittime = $request->getVal( 'wpEdittime' );
 664                         $this->starttime = $request->getVal( 'wpStarttime' );
 665
 666                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 667
 668                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 669                                 // wpTextbox1 field is missing, possibly due to being "too big"
 670                                 // according to some filter rules such as Suhosin's setting for
 671                                 // suhosin.request.max_value_length (d'oh)
 672                                 $this->incompleteForm = true;
 673                         } else {
 674                                 // edittime should be one of our last fields; if it's missing,
 675                                 // the submission probably broke somewhere in the middle.
 676                                 $this->incompleteForm = is_null( $this->edittime );
 677                         }
 678                         if ( $this->incompleteForm ) {
 679                                 # If the form is incomplete, force to preview.
 680                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 681                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 682                                 $this->preview = true;
 683                         } else {
 684                                 /* Fallback for live preview */
 685                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 686                                 $this->diff = $request->getCheck( 'wpDiff' );
 687
 688                                 // Remember whether a save was requested, so we can indicate
 689                                 // if we forced preview due to session failure.
 690                                 $this->mTriedSave = !$this->preview;
 691
 692                                 if ( $this->tokenOk( $request ) ) {
 693                                         # Some browsers will not report any submit button
 694                                         # if the user hits enter in the comment box.
 695                                         # The unmarked state will be assumed to be a save,
 696                                         # if the form seems otherwise complete.
 697                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 698                                 } elseif ( $this->diff ) {
 699                                         # Failed token check, but only requested "Show Changes".
 700                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 701                                 } else {
 702                                         # Page might be a hack attempt posted from
 703                                         # an external site. Preview instead of saving.
 704                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 705                                         $this->preview = true;
 706                                 }
 707                         }
 708                         $this->save = !$this->preview && !$this->diff;
 709                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 710                                 $this->edittime = null;
 711                         }
 712
 713                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 714                                 $this->starttime = null;
 715                         }
 716
 717                         $this->recreate = $request->getCheck( 'wpRecreate' );
 718
 719                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 720                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 721
 722                         # Don't force edit summaries when a user is editing their own user or talk page
 723                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 724                                 $this->mTitle->getText() == $wgUser->getName() )
 725                         {
 726                                 $this->allowBlankSummary = true;
 727                         } else {
 728                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary' );
 729                         }
 730
 731                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 732                 } else {
 733                         # Not a posted form? Start with nothing.
 734                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 735                         $this->textbox1 = '';
 736                         $this->summary = '';
 737                         $this->sectiontitle = '';
 738                         $this->edittime = '';
 739                         $this->starttime = wfTimestampNow();
 740                         $this->edit = false;
 741                         $this->preview = false;
 742                         $this->save = false;
 743                         $this->diff = false;
 744                         $this->minoredit = false;
 745                         $this->watchthis = $request->getBool( 'watchthis', false ); // Watch may be overriden by request parameters
 746                         $this->recreate = false;
 747
 748                         // When creating a new section, we can preload a section title by passing it as the
 749                         // preloadtitle parameter in the URL (Bug 13100)
 750                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 751                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 752                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 753                                 $this->summary = $request->getVal( 'preloadtitle' );
 754                         }
 755                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 756                                 $this->summary = $request->getText( 'summary' );
 757                                 if ( $this->summary !== '' ) {
 758                                         $this->hasPresetSummary = true;
 759                                 }
 760                         }
 761
 762                         if ( $request->getVal( 'minor' ) ) {
 763                                 $this->minoredit = true;
 764                         }
 765                 }
 766
 767                 $this->oldid = $request->getInt( 'oldid' );
 768
 769                 $this->bot = $request->getBool( 'bot', true );
 770                 $this->nosummary = $request->getBool( 'nosummary' );
 771
 772                 $content_handler = ContentHandler::getForTitle( $this->mTitle );
 773                 $this->contentModel = $request->getText( 'model', $content_handler->getModelID() ); #may be overridden by revision
 774                 $this->contentFormat = $request->getText( 'format', $content_handler->getDefaultFormat() ); #may be overridden by revision
 775
 776                 #TODO: check if the desired model is allowed in this namespace, and if a transition from the page's current model to the new model is allowed
 777                 #TODO: check if the desired content model supports the given content format!
 778
 779                 $this->live = $request->getCheck( 'live' );
 780                 $this->editintro = $request->getText( 'editintro',
 781                         // Custom edit intro for new sections
 782                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 783
 784                 // Allow extensions to modify form data
 785                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 786
 787                 wfProfileOut( __METHOD__ );
 788         }
 789
 790         /**
 791          * Subpage overridable method for extracting the page content data from the
 792          * posted form to be placed in $this->textbox1, if using customized input
 793          * this method should be overrided and return the page text that will be used
 794          * for saving, preview parsing and so on...
 795          *
 796          * @param $request WebRequest
 797          */
 798         protected function importContentFormData( &$request ) {
 799                 return; // Don't do anything, EditPage already extracted wpTextbox1
 800         }
 801
 802         /**
 803          * Initialise form fields in the object
 804          * Called on the first invocation, e.g. when a user clicks an edit link
 805          * @return bool -- if the requested section is valid
 806          */
 807         function initialiseForm() {
 808                 global $wgUser;
 809                 $this->edittime = $this->mArticle->getTimestamp();
 810
 811                 $content = $this->getContentObject( false ); #TODO: track content object?!
 812                 if ( $content === false ) {
 813                         return false;
 814                 }
 815                 $this->textbox1 = $this->toEditText( $content );
 816
 817                 // activate checkboxes if user wants them to be always active
 818                 # Sort out the "watch" checkbox
 819                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 820                         # Watch all edits
 821                         $this->watchthis = true;
 822                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 823                         # Watch creations
 824                         $this->watchthis = true;
 825                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
 826                         # Already watched
 827                         $this->watchthis = true;
 828                 }
 829                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 830                         $this->minoredit = true;
 831                 }
 832                 if ( $this->textbox1 === false ) {
 833                         return false;
 834                 }
 835                 wfProxyCheck();
 836                 return true;
 837         }
 838
 839         /**
 840          * Fetch initial editing page content.
 841          *
 842          * @param $def_text string|bool
 843          * @return mixed string on success, $def_text for invalid sections
 844          * @private
 845          * @deprecated since 1.21, get WikiPage::getContent() instead.
 846          */
 847         function getContent( $def_text = false ) {
 848                 ContentHandler::deprecated( __METHOD__, '1.21' );
 849
 850                 if ( $def_text !== null && $def_text !== false && $def_text !== '' ) {
 851                         $def_content = $this->toEditContent( $def_text );
 852                 } else {
 853                         $def_content = false;
 854                 }
 855
 856                 $content = $this->getContentObject( $def_content );
 857
 858                 // Note: EditPage should only be used with text based content anyway.
 859                 return $this->toEditText( $content );
 860         }
 861
 862         /**
 863          * @param Content|null $def_content The default value to return
 864          *
 865          * @return mixed Content on success, $def_content for invalid sections
 866          *
 867          * @since 1.21
 868          */
 869         protected function getContentObject( $def_content = null ) {
 870                 global $wgOut, $wgRequest;
 871
 872                 wfProfileIn( __METHOD__ );
 873
 874                 $content = false;
 875
 876                 // For message page not locally set, use the i18n message.
 877                 // For other non-existent articles, use preload text if any.
 878                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
 879                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
 880                                 # If this is a system message, get the default text.
 881                                 $msg = $this->mTitle->getDefaultMessageText();
 882
 883                                 $content = $this->toEditContent( $msg );
 884                         }
 885                         if ( $content === false ) {
 886                                 # If requested, preload some text.
 887                                 $preload = $wgRequest->getVal( 'preload',
 888                                         // Custom preload text for new sections
 889                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 890
 891                                 $content = $this->getPreloadedContent( $preload );
 892                         }
 893                 // For existing pages, get text based on "undo" or section parameters.
 894                 } else {
 895                         if ( $this->section != '' ) {
 896                                 // Get section edit text (returns $def_text for invalid sections)
 897                                 $orig = $this->getOriginalContent();
 898                                 $content = $orig ? $orig->getSection( $this->section ) : null;
 899
 900                                 if ( !$content ) $content = $def_content;
 901                         } else {
 902                                 $undoafter = $wgRequest->getInt( 'undoafter' );
 903                                 $undo = $wgRequest->getInt( 'undo' );
 904
 905                                 if ( $undo > 0 && $undoafter > 0 ) {
 906                                         if ( $undo < $undoafter ) {
 907                                                 # If they got undoafter and undo round the wrong way, switch them
 908                                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 909                                         }
 910
 911                                         $undorev = Revision::newFromId( $undo );
 912                                         $oldrev = Revision::newFromId( $undoafter );
 913
 914                                         # Sanity check, make sure it's the right page,
 915                                         # the revisions exist and they were not deleted.
 916                                         # Otherwise, $content will be left as-is.
 917                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 918                                                 $undorev->getPage() == $oldrev->getPage() &&
 919                                                 $undorev->getPage() == $this->mTitle->getArticleID() &&
 920                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 921                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 922
 923                                                 $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
 924
 925                                                 if ( $content === false ) {
 926                                                         # Warn the user that something went wrong
 927                                                         $undoMsg = 'failure';
 928                                                 } else {
 929                                                         # Inform the user of our success and set an automatic edit summary
 930                                                         $undoMsg = 'success';
 931
 932                                                         # If we just undid one rev, use an autosummary
 933                                                         $firstrev = $oldrev->getNext();
 934                                                         if ( $firstrev && $firstrev->getId() == $undo ) {
 935                                                                 $undoSummary = wfMessage( 'undo-summary', $undo, $undorev->getUserText() )->inContentLanguage()->text();
 936                                                                 if ( $this->summary === '' ) {
 937                                                                         $this->summary = $undoSummary;
 938                                                                 } else {
 939                                                                         $this->summary = $undoSummary . wfMessage( 'colon-separator' )
 940                                                                                 ->inContentLanguage()->text() . $this->summary;
 941                                                                 }
 942                                                                 $this->undidRev = $undo;
 943                                                         }
 944                                                         $this->formtype = 'diff';
 945                                                 }
 946                                         } else {
 947                                                 // Failed basic sanity checks.
 948                                                 // Older revisions may have been removed since the link
 949                                                 // was created, or we may simply have got bogus input.
 950                                                 $undoMsg = 'norev';
 951                                         }
 952
 953                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
 954                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
 955                                                 wfMessage( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
 956                                 }
 957
 958                                 if ( $content === false ) {
 959                                         $content = $this->getOriginalContent();
 960                                 }
 961                         }
 962                 }
 963
 964                 wfProfileOut( __METHOD__ );
 965                 return $content;
 966         }
 967
 968         /**
 969          * Get the content of the wanted revision, without section extraction.
 970          *
 971          * The result of this function can be used to compare user's input with
 972          * section replaced in its context (using WikiPage::replaceSection())
 973          * to the original text of the edit.
 974          *
 975          * This difers from Article::getContent() that when a missing revision is
 976          * encountered the result will be null and not the
 977          * 'missing-revision' message.
 978          *
 979          * @since 1.19
 980          * @return Content|null
 981          */
 982         private function getOriginalContent() {
 983                 if ( $this->section == 'new' ) {
 984                         return $this->getCurrentContent();
 985                 }
 986                 $revision = $this->mArticle->getRevisionFetched();
 987                 if ( $revision === null ) {
 988                         if ( !$this->contentModel ) $this->contentModel = $this->getTitle()->getContentModel();
 989                         $handler = ContentHandler::getForModelID( $this->contentModel );
 990
 991                         return $handler->makeEmptyContent();
 992                 }
 993                 $content = $revision->getContent();
 994                 return $content;
 995         }
 996
 997         /**
 998          * Get the current content of the page. This is basically similar to
 999          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1000          * content object is returned instead of null.
1001          *
1002          * @since 1.21
1003          * @return Content
1004          */
1005         protected function getCurrentContent() {
1006                 $rev = $this->mArticle->getRevision();
1007                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1008
1009                 if ( $content === false || $content === null ) {
1010                         if ( !$this->contentModel ) $this->contentModel = $this->getTitle()->getContentModel();
1011                         $handler = ContentHandler::getForModelID( $this->contentModel );
1012
1013                         return $handler->makeEmptyContent();
1014                 } else {
1015                         # nasty side-effect, but needed for consistency
1016                         $this->contentModel = $rev->getContentModel();
1017                         $this->contentFormat = $rev->getContentFormat();
1018
1019                         return $content;
1020                 }
1021         }
1022
1023         /**
1024          * Use this method before edit() to preload some text into the edit box
1025          *
1026          * @param $text string
1027          * @deprecated since 1.21, use setPreloadedContent() instead.
1028          */
1029         public function setPreloadedText( $text ) {
1030                 ContentHandler::deprecated( __METHOD__, "1.21" );
1031
1032                 $content = $this->toEditContent( $text );
1033
1034                 $this->setPreloadedContent( $content );
1035         }
1036
1037         /**
1038          * Use this method before edit() to preload some content into the edit box
1039          *
1040          * @param $content Content
1041          *
1042          * @since 1.21
1043          */
1044         public function setPreloadedContent( Content $content ) {
1045                 $this->mPreloadContent = $content;
1046         }
1047
1048         /**
1049          * Get the contents to be preloaded into the box, either set by
1050          * an earlier setPreloadText() or by loading the given page.
1051          *
1052          * @param $preload String: representing the title to preload from.
1053          *
1054          * @return String
1055          *
1056          * @deprecated since 1.21, use getPreloadedContent() instead
1057          */
1058         protected function getPreloadedText( $preload ) {
1059                 ContentHandler::deprecated( __METHOD__, "1.21" );
1060
1061                 $content = $this->getPreloadedContent( $preload );
1062                 $text = $this->toEditText( $content );
1063
1064                 return $text;
1065         }
1066
1067         /**
1068          * Get the contents to be preloaded into the box, either set by
1069          * an earlier setPreloadText() or by loading the given page.
1070          *
1071          * @param $preload String: representing the title to preload from.
1072          *
1073          * @return Content
1074          *
1075          * @since 1.21
1076          */
1077         protected function getPreloadedContent( $preload ) {
1078                 global $wgUser;
1079
1080                 if ( !empty( $this->mPreloadContent ) ) {
1081                         return $this->mPreloadContent;
1082                 }
1083
1084                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1085
1086                 if ( $preload === '' ) {
1087                         return $handler->makeEmptyContent();
1088                 }
1089
1090                 $title = Title::newFromText( $preload );
1091                 # Check for existence to avoid getting MediaWiki:Noarticletext
1092                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1093                         //TODO: somehow show a warning to the user!
1094                         return $handler->makeEmptyContent();
1095                 }
1096
1097                 $page = WikiPage::factory( $title );
1098                 if ( $page->isRedirect() ) {
1099                         $title = $page->getRedirectTarget();
1100                         # Same as before
1101                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1102                                 //TODO: somehow show a warning to the user!
1103                                 return $handler->makeEmptyContent();
1104                         }
1105                         $page = WikiPage::factory( $title );
1106                 }
1107
1108                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1109                 $content = $page->getContent( Revision::RAW );
1110
1111                 if ( !$content ) {
1112                         //TODO: somehow show a warning to the user!
1113                         return $handler->makeEmptyContent();
1114                 }
1115
1116                 if ( $content->getModel() !== $handler->getModelID() ) {
1117                         $converted = $content->convert( $handler->getModelID() );
1118
1119                         if ( !$converted ) {
1120                                 //TODO: somehow show a warning to the user!
1121                                 wfDebug( "Attempt to preload incompatible content: "
1122                                                 . "can't convert " . $content->getModel()
1123                                                 . " to " . $handler->getModelID() );
1124
1125                                 return $handler->makeEmptyContent();
1126                         }
1127
1128                         $content = $converted;
1129                 }
1130
1131                 return $content->preloadTransform( $title, $parserOptions );
1132         }
1133
1134         /**
1135          * Make sure the form isn't faking a user's credentials.
1136          *
1137          * @param $request WebRequest
1138          * @return bool
1139          * @private
1140          */
1141         function tokenOk( &$request ) {
1142                 global $wgUser;
1143                 $token = $request->getVal( 'wpEditToken' );
1144                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1145                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1146                 return $this->mTokenOk;
1147         }
1148
1149         /**
1150          * Sets post-edit cookie indicating the user just saved a particular revision.
1151          *
1152          * This uses a temporary cookie for each revision ID so separate saves will never
1153          * interfere with each other.
1154          *
1155          * The cookie is deleted in the mediawiki.action.view.postEdit JS module after
1156          * the redirect.  It must be clearable by JavaScript code, so it must not be
1157          * marked HttpOnly. The JavaScript code converts the cookie to a wgPostEdit config
1158          * variable.
1159          *
1160          * Since WebResponse::setcookie does not allow forcing HttpOnly for a single
1161          * cookie, we have to use PHP's setcookie() directly.
1162          *
1163          * We use a path of '/' since wgCookiePath is not exposed to JS
1164          *
1165          * If the variable were set on the server, it would be cached, which is unwanted
1166          * since the post-edit state should only apply to the load right after the save.
1167          */
1168         protected function setPostEditCookie() {
1169                 global $wgCookiePrefix, $wgCookieDomain;
1170                 $revisionId = $this->mArticle->getLatest();
1171                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1172
1173                 setcookie( $wgCookiePrefix . $postEditKey, '1', time() + self::POST_EDIT_COOKIE_DURATION, '/', $wgCookieDomain );
1174         }
1175
1176         /**
1177          * Attempt submission
1178          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1179          * @return bool false if output is done, true if the rest of the form should be displayed
1180          */
1181         function attemptSave() {
1182                 global $wgUser, $wgOut;
1183
1184                 $resultDetails = false;
1185                 # Allow bots to exempt some edits from bot flagging
1186                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1187                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1188                 // FIXME: once the interface for internalAttemptSave() is made nicer, this should use the message in $status
1189                 if ( $status->value == self::AS_SUCCESS_UPDATE || $status->value == self::AS_SUCCESS_NEW_ARTICLE ) {
1190                         $this->didSave = true;
1191                         if ( !$resultDetails['nullEdit'] ) {
1192                                 $this->setPostEditCookie();
1193                         }
1194                 }
1195
1196                 switch ( $status->value ) {
1197                         case self::AS_HOOK_ERROR_EXPECTED:
1198                         case self::AS_CONTENT_TOO_BIG:
1199                         case self::AS_ARTICLE_WAS_DELETED:
1200                         case self::AS_CONFLICT_DETECTED:
1201                         case self::AS_SUMMARY_NEEDED:
1202                         case self::AS_TEXTBOX_EMPTY:
1203                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1204                         case self::AS_END:
1205                                 return true;
1206
1207                         case self::AS_HOOK_ERROR:
1208                                 return false;
1209
1210                         case self::AS_PARSE_ERROR:
1211                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>' );
1212                                 return true;
1213
1214                         case self::AS_SUCCESS_NEW_ARTICLE:
1215                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1216                                 $anchor = isset ( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1217                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1218                                 return false;
1219
1220                         case self::AS_SUCCESS_UPDATE:
1221                                 $extraQuery = '';
1222                                 $sectionanchor = $resultDetails['sectionanchor'];
1223
1224                                 // Give extensions a chance to modify URL query on update
1225                                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this->mArticle, &$sectionanchor, &$extraQuery ) );
1226
1227                                 if ( $resultDetails['redirect'] ) {
1228                                         if ( $extraQuery == '' ) {
1229                                                 $extraQuery = 'redirect=no';
1230                                         } else {
1231                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1232                                         }
1233                                 }
1234                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1235                                 return false;
1236
1237                         case self::AS_BLANK_ARTICLE:
1238                                 $wgOut->redirect( $this->getContextTitle()->getFullURL() );
1239                                 return false;
1240
1241                         case self::AS_SPAM_ERROR:
1242                                 $this->spamPageWithContent( $resultDetails['spam'] );
1243                                 return false;
1244
1245                         case self::AS_BLOCKED_PAGE_FOR_USER:
1246                                 throw new UserBlockedError( $wgUser->getBlock() );
1247
1248                         case self::AS_IMAGE_REDIRECT_ANON:
1249                         case self::AS_IMAGE_REDIRECT_LOGGED:
1250                                 throw new PermissionsError( 'upload' );
1251
1252                         case self::AS_READ_ONLY_PAGE_ANON:
1253                         case self::AS_READ_ONLY_PAGE_LOGGED:
1254                                 throw new PermissionsError( 'edit' );
1255
1256                         case self::AS_READ_ONLY_PAGE:
1257                                 throw new ReadOnlyError;
1258
1259                         case self::AS_RATE_LIMITED:
1260                                 throw new ThrottledError();
1261
1262                         case self::AS_NO_CREATE_PERMISSION:
1263                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1264                                 throw new PermissionsError( $permission );
1265
1266                         default:
1267                                 // We don't recognize $status->value. The only way that can happen
1268                                 // is if an extension hook aborted from inside ArticleSave.
1269                                 // Render the status object into $this->hookError
1270                                 // FIXME this sucks, we should just use the Status object throughout
1271                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1272                                         '</div>';
1273                                 return true;
1274                 }
1275         }
1276
1277         /**
1278          * Run hooks that can filter edits just before they get saved.
1279          *
1280          * @param Content $content the Content to filter.
1281          * @param Status  $status for reporting the outcome to the caller
1282          * @param User    $user the user performing the edit
1283          *
1284          * @return bool
1285          */
1286         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1287                 // Run old style post-section-merge edit filter
1288                 if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged',
1289                         array( $this, $content, &$this->hookError, $this->summary ) ) ) {
1290
1291                         # Error messages etc. could be handled within the hook...
1292                         $status->fatal( 'hookaborted' );
1293                         $status->value = self::AS_HOOK_ERROR;
1294                         return false;
1295                 } elseif ( $this->hookError != '' ) {
1296                         # ...or the hook could be expecting us to produce an error
1297                         $status->fatal( 'hookaborted' );
1298                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1299                         return false;
1300                 }
1301
1302                 // Run new style post-section-merge edit filter
1303                 if ( !wfRunHooks( 'EditFilterMergedContent',
1304                         array( $this->mArticle->getContext(), $content, $status, $this->summary,
1305                                 $user, $this->minoredit ) ) ) {
1306
1307                         # Error messages etc. could be handled within the hook...
1308                         // XXX: $status->value may already be something informative...
1309                         $this->hookError = $status->getWikiText();
1310                         $status->fatal( 'hookaborted' );
1311                         $status->value = self::AS_HOOK_ERROR;
1312                         return false;
1313                 } elseif ( !$status->isOK() ) {
1314                         # ...or the hook could be expecting us to produce an error
1315                         // FIXME this sucks, we should just use the Status object throughout
1316                         $this->hookError = $status->getWikiText();
1317                         $status->fatal( 'hookaborted' );
1318                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1319                         return false;
1320                 }
1321
1322                 return true;
1323         }
1324
1325         /**
1326          * Attempt submission (no UI)
1327          *
1328          * @param array $result array to add statuses to, currently with the possible keys:
1329          *  spam - string - Spam string from content if any spam is detected by matchSpamRegex
1330          *  sectionanchor - string - Section anchor for a section save
1331          *  nullEdit - boolean - Set if doEditContent is OK.  True if null edit, false otherwise.
1332          *  redirect - boolean -  Set if doEditContent is OK.  True if resulting revision is a redirect
1333          * @param bool $bot True if edit is being made under the bot right.
1334          *
1335          * @return Status object, possibly with a message, but always with one of the AS_* constants in $status->value,
1336          *
1337          * FIXME: This interface is TERRIBLE, but hard to get rid of due to various error display idiosyncrasies. There are
1338          * also lots of cases where error metadata is set in the object and retrieved later instead of being returned, e.g.
1339          * AS_CONTENT_TOO_BIG and AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some time.
1340          */
1341         function internalAttemptSave( &$result, $bot = false ) {
1342                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1343
1344                 $status = Status::newGood();
1345
1346                 wfProfileIn( __METHOD__ );
1347                 wfProfileIn( __METHOD__ . '-checks' );
1348
1349                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
1350                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1351                         $status->fatal( 'hookaborted' );
1352                         $status->value = self::AS_HOOK_ERROR;
1353                         wfProfileOut( __METHOD__ . '-checks' );
1354                         wfProfileOut( __METHOD__ );
1355                         return $status;
1356                 }
1357
1358                 try {
1359                         # Construct Content object
1360                         $textbox_content = $this->toEditContent( $this->textbox1 );
1361                 } catch ( MWContentSerializationException $ex ) {
1362                         $status->fatal( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
1363                         $status->value = self::AS_PARSE_ERROR;
1364                         wfProfileOut( __METHOD__ . '-checks' );
1365                         wfProfileOut( __METHOD__ );
1366                         return $status;
1367                 }
1368
1369                 # Check image redirect
1370                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1371                         $textbox_content->isRedirect() &&
1372                         !$wgUser->isAllowed( 'upload' ) ) {
1373                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1374                                 $status->setResult( false, $code );
1375
1376                                 wfProfileOut( __METHOD__ . '-checks' );
1377                                 wfProfileOut( __METHOD__ );
1378
1379                                 return $status;
1380                 }
1381
1382                 # Check for spam
1383                 $match = self::matchSummarySpamRegex( $this->summary );
1384                 if ( $match === false ) {
1385                         $match = self::matchSpamRegex( $this->textbox1 );
1386                 }
1387                 if ( $match !== false ) {
1388                         $result['spam'] = $match;
1389                         $ip = $wgRequest->getIP();
1390                         $pdbk = $this->mTitle->getPrefixedDBkey();
1391                         $match = str_replace( "\n", '', $match );
1392                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1393                         $status->fatal( 'spamprotectionmatch', $match );
1394                         $status->value = self::AS_SPAM_ERROR;
1395                         wfProfileOut( __METHOD__ . '-checks' );
1396                         wfProfileOut( __METHOD__ );
1397                         return $status;
1398                 }
1399                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
1400                         # Error messages etc. could be handled within the hook...
1401                         $status->fatal( 'hookaborted' );
1402                         $status->value = self::AS_HOOK_ERROR;
1403                         wfProfileOut( __METHOD__ . '-checks' );
1404                         wfProfileOut( __METHOD__ );
1405                         return $status;
1406                 } elseif ( $this->hookError != '' ) {
1407                         # ...or the hook could be expecting us to produce an error
1408                         $status->fatal( 'hookaborted' );
1409                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1410                         wfProfileOut( __METHOD__ . '-checks' );
1411                         wfProfileOut( __METHOD__ );
1412                         return $status;
1413                 }
1414
1415                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1416                         // Auto-block user's IP if the account was "hard" blocked
1417                         $wgUser->spreadAnyEditBlock();
1418                         # Check block state against master, thus 'false'.
1419                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1420                         wfProfileOut( __METHOD__ . '-checks' );
1421                         wfProfileOut( __METHOD__ );
1422                         return $status;
1423                 }
1424
1425                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1426                 if ( $this->kblength > $wgMaxArticleSize ) {
1427                         // Error will be displayed by showEditForm()
1428                         $this->tooBig = true;
1429                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1430                         wfProfileOut( __METHOD__ . '-checks' );
1431                         wfProfileOut( __METHOD__ );
1432                         return $status;
1433                 }
1434
1435                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1436                         if ( $wgUser->isAnon() ) {
1437                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1438                                 wfProfileOut( __METHOD__ . '-checks' );
1439                                 wfProfileOut( __METHOD__ );
1440                                 return $status;
1441                         } else {
1442                                 $status->fatal( 'readonlytext' );
1443                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1444                                 wfProfileOut( __METHOD__ . '-checks' );
1445                                 wfProfileOut( __METHOD__ );
1446                                 return $status;
1447                         }
1448                 }
1449
1450                 if ( wfReadOnly() ) {
1451                         $status->fatal( 'readonlytext' );
1452                         $status->value = self::AS_READ_ONLY_PAGE;
1453                         wfProfileOut( __METHOD__ . '-checks' );
1454                         wfProfileOut( __METHOD__ );
1455                         return $status;
1456                 }
1457                 if ( $wgUser->pingLimiter() ) {
1458                         $status->fatal( 'actionthrottledtext' );
1459                         $status->value = self::AS_RATE_LIMITED;
1460                         wfProfileOut( __METHOD__ . '-checks' );
1461                         wfProfileOut( __METHOD__ );
1462                         return $status;
1463                 }
1464
1465                 # If the article has been deleted while editing, don't save it without
1466                 # confirmation
1467                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1468                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1469                         wfProfileOut( __METHOD__ . '-checks' );
1470                         wfProfileOut( __METHOD__ );
1471                         return $status;
1472                 }
1473
1474                 wfProfileOut( __METHOD__ . '-checks' );
1475
1476                 # Load the page data from the master. If anything changes in the meantime,
1477                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1478                 $this->mArticle->loadPageData( 'fromdbmaster' );
1479                 $new = !$this->mArticle->exists();
1480
1481                 if ( $new ) {
1482                         // Late check for create permission, just in case *PARANOIA*
1483                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1484                                 $status->fatal( 'nocreatetext' );
1485                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1486                                 wfDebug( __METHOD__ . ": no create permission\n" );
1487                                 wfProfileOut( __METHOD__ );
1488                                 return $status;
1489                         }
1490
1491                         # Don't save a new article if it's blank.
1492                         if ( $this->textbox1 == '' ) {
1493                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1494                                 wfProfileOut( __METHOD__ );
1495                                 return $status;
1496                         }
1497
1498                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1499                                 wfProfileOut( __METHOD__ );
1500                                 return $status;
1501                         }
1502
1503                         $content = $textbox_content;
1504
1505                         $result['sectionanchor'] = '';
1506                         if ( $this->section == 'new' ) {
1507                                 if ( $this->sectiontitle !== '' ) {
1508                                         // Insert the section title above the content.
1509                                         $content = $content->addSectionHeader( $this->sectiontitle );
1510
1511                                         // Jump to the new section
1512                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1513
1514                                         // If no edit summary was specified, create one automatically from the section
1515                                         // title and have it link to the new section. Otherwise, respect the summary as
1516                                         // passed.
1517                                         if ( $this->summary === '' ) {
1518                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1519                                                 $this->summary = wfMessage( 'newsectionsummary' )
1520                                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1521                                         }
1522                                 } elseif ( $this->summary !== '' ) {
1523                                         // Insert the section title above the content.
1524                                         $content = $content->addSectionHeader( $this->summary );
1525
1526                                         // Jump to the new section
1527                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1528
1529                                         // Create a link to the new section from the edit summary.
1530                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1531                                         $this->summary = wfMessage( 'newsectionsummary' )
1532                                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1533                                 }
1534                         }
1535
1536                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1537
1538                 } else { # not $new
1539
1540                         # Article exists. Check for edit conflict.
1541
1542                         $this->mArticle->clear(); # Force reload of dates, etc.
1543                         $timestamp = $this->mArticle->getTimestamp();
1544
1545                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1546
1547                         if ( $timestamp != $this->edittime ) {
1548                                 $this->isConflict = true;
1549                                 if ( $this->section == 'new' ) {
1550                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1551                                                 $this->mArticle->getComment() == $this->summary ) {
1552                                                 // Probably a duplicate submission of a new comment.
1553                                                 // This can happen when squid resends a request after
1554                                                 // a timeout but the first one actually went through.
1555                                                 wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
1556                                         } else {
1557                                                 // New comment; suppress conflict.
1558                                                 $this->isConflict = false;
1559                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1560                                         }
1561                                 } elseif ( $this->section == '' && Revision::userWasLastToEdit( DB_MASTER, $this->mTitle->getArticleID(),
1562                                                         $wgUser->getId(), $this->edittime ) ) {
1563                                         # Suppress edit conflict with self, except for section edits where merging is required.
1564                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1565                                         $this->isConflict = false;
1566                                 }
1567                         }
1568
1569                         // If sectiontitle is set, use it, otherwise use the summary as the section title (for
1570                         // backwards compatibility with old forms/bots).
1571                         if ( $this->sectiontitle !== '' ) {
1572                                 $sectionTitle = $this->sectiontitle;
1573                         } else {
1574                                 $sectionTitle = $this->summary;
1575                         }
1576
1577                         $content = null;
1578
1579                         if ( $this->isConflict ) {
1580                                 wfDebug( __METHOD__ . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1581                                                 . " (article time '{$timestamp}')\n" );
1582
1583                                 $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle, $this->edittime );
1584                         } else {
1585                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1586                                 $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle );
1587                         }
1588
1589                         if ( is_null( $content ) ) {
1590                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1591                                 $this->isConflict = true;
1592                                 $content = $textbox_content; // do not try to merge here!
1593                         } elseif ( $this->isConflict ) {
1594                                 # Attempt merge
1595                                 if ( $this->mergeChangesIntoContent( $content ) ) {
1596                                         // Successful merge! Maybe we should tell the user the good news?
1597                                         $this->isConflict = false;
1598                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1599                                 } else {
1600                                         $this->section = '';
1601                                         $this->textbox1 = ContentHandler::getContentText( $content );
1602                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1603                                 }
1604                         }
1605
1606                         if ( $this->isConflict ) {
1607                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1608                                 wfProfileOut( __METHOD__ );
1609                                 return $status;
1610                         }
1611
1612                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
1613                                 wfProfileOut( __METHOD__ );
1614                                 return $status;
1615                         }
1616
1617                         if ( $this->section == 'new' ) {
1618                                 // Handle the user preference to force summaries here
1619                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
1620                                         $this->missingSummary = true;
1621                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1622                                         $status->value = self::AS_SUMMARY_NEEDED;
1623                                         wfProfileOut( __METHOD__ );
1624                                         return $status;
1625                                 }
1626
1627                                 // Do not allow the user to post an empty comment
1628                                 if ( $this->textbox1 == '' ) {
1629                                         $this->missingComment = true;
1630                                         $status->fatal( 'missingcommenttext' );
1631                                         $status->value = self::AS_TEXTBOX_EMPTY;
1632                                         wfProfileOut( __METHOD__ );
1633                                         return $status;
1634                                 }
1635                         } elseif ( !$this->allowBlankSummary
1636                                 && !$content->equals( $this->getOriginalContent() )
1637                                 && !$content->isRedirect()
1638                                 && md5( $this->summary ) == $this->autoSumm
1639                         ) {
1640                                 $this->missingSummary = true;
1641                                 $status->fatal( 'missingsummary' );
1642                                 $status->value = self::AS_SUMMARY_NEEDED;
1643                                 wfProfileOut( __METHOD__ );
1644                                 return $status;
1645                         }
1646
1647                         # All's well
1648                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1649                         $sectionanchor = '';
1650                         if ( $this->section == 'new' ) {
1651                                 if ( $this->sectiontitle !== '' ) {
1652                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1653                                         // If no edit summary was specified, create one automatically from the section
1654                                         // title and have it link to the new section. Otherwise, respect the summary as
1655                                         // passed.
1656                                         if ( $this->summary === '' ) {
1657                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1658                                                 $this->summary = wfMessage( 'newsectionsummary' )
1659                                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1660                                         }
1661                                 } elseif ( $this->summary !== '' ) {
1662                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1663                                         # This is a new section, so create a link to the new section
1664                                         # in the revision summary.
1665                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1666                                         $this->summary = wfMessage( 'newsectionsummary' )
1667                                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1668                                 }
1669                         } elseif ( $this->section != '' ) {
1670                                 # Try to get a section anchor from the section source, redirect to edited section if header found
1671                                 # XXX: might be better to integrate this into Article::replaceSection
1672                                 # for duplicate heading checking and maybe parsing
1673                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1674                                 # we can't deal with anchors, includes, html etc in the header for now,
1675                                 # headline would need to be parsed to improve this
1676                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1677                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1678                                 }
1679                         }
1680                         $result['sectionanchor'] = $sectionanchor;
1681                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1682
1683                         // Save errors may fall down to the edit form, but we've now
1684                         // merged the section into full text. Clear the section field
1685                         // so that later submission of conflict forms won't try to
1686                         // replace that into a duplicated mess.
1687                         $this->textbox1 = $this->toEditText( $content );
1688                         $this->section = '';
1689
1690                         $status->value = self::AS_SUCCESS_UPDATE;
1691                 }
1692
1693                 // Check for length errors again now that the section is merged in
1694                         $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1695                 if ( $this->kblength > $wgMaxArticleSize ) {
1696                         $this->tooBig = true;
1697                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1698                         wfProfileOut( __METHOD__ );
1699                         return $status;
1700                 }
1701
1702                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1703                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1704                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1705                         ( $bot ? EDIT_FORCE_BOT : 0 );
1706
1707                         $doEditStatus = $this->mArticle->doEditContent( $content, $this->summary, $flags,
1708                                                                                                                         false, null, $this->contentFormat );
1709
1710                 if ( !$doEditStatus->isOK() ) {
1711                         // Failure from doEdit()
1712                         // Show the edit conflict page for certain recognized errors from doEdit(),
1713                         // but don't show it for errors from extension hooks
1714                         $errors = $doEditStatus->getErrorsArray();
1715                         if ( in_array( $errors[0][0], array( 'edit-gone-missing', 'edit-conflict',
1716                                 'edit-already-exists' ) ) )
1717                         {
1718                                 $this->isConflict = true;
1719                                 // Destroys data doEdit() put in $status->value but who cares
1720                                 $doEditStatus->value = self::AS_END;
1721                         }
1722                         wfProfileOut( __METHOD__ );
1723                         return $doEditStatus;
1724                 }
1725
1726                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
1727                 $result['redirect'] = $content->isRedirect();
1728                 $this->updateWatchlist();
1729                 wfProfileOut( __METHOD__ );
1730                 return $status;
1731         }
1732
1733         /**
1734          * Register the change of watch status
1735          */
1736         protected function updateWatchlist() {
1737                 global $wgUser;
1738
1739                 if ( $wgUser->isLoggedIn() && $this->watchthis != $wgUser->isWatched( $this->mTitle ) ) {
1740                         $fname = __METHOD__;
1741                         $title = $this->mTitle;
1742                         $watch = $this->watchthis;
1743
1744                         // Do this in its own transaction to reduce contention...
1745                         $dbw = wfGetDB( DB_MASTER );
1746                         $dbw->onTransactionIdle( function() use ( $dbw, $title, $watch, $wgUser, $fname ) {
1747                                 $dbw->begin( $fname );
1748                                 if ( $watch ) {
1749                                         WatchAction::doWatch( $title, $wgUser );
1750                                 } else {
1751                                         WatchAction::doUnwatch( $title, $wgUser );
1752                                 }
1753                                 $dbw->commit( $fname );
1754                         } );
1755                 }
1756         }
1757
1758         /**
1759          * Attempts to merge text content with base and current revisions
1760          *
1761          * @param $editText string
1762          *
1763          * @return bool
1764          * @deprecated since 1.21, use mergeChangesIntoContent() instead
1765          */
1766         function mergeChangesInto( &$editText ) {
1767                 ContentHandler::deprecated( __METHOD__, "1.21" );
1768
1769                 $editContent = $this->toEditContent( $editText );
1770
1771                 $ok = $this->mergeChangesIntoContent( $editContent );
1772
1773                 if ( $ok ) {
1774                         $editText = $this->toEditText( $editContent );
1775                         return true;
1776                 }
1777                 return false;
1778         }
1779
1780         /**
1781          * Attempts to do 3-way merge of edit content with a base revision
1782          * and current content, in case of edit conflict, in whichever way appropriate
1783          * for the content type.
1784          *
1785          * @since 1.21
1786          *
1787          * @param $editContent
1788          *
1789          * @return bool
1790          */
1791         private function mergeChangesIntoContent( &$editContent ) {
1792                 wfProfileIn( __METHOD__ );
1793
1794                 $db = wfGetDB( DB_MASTER );
1795
1796                 // This is the revision the editor started from
1797                 $baseRevision = $this->getBaseRevision();
1798                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
1799
1800                 if ( is_null( $baseContent ) ) {
1801                         wfProfileOut( __METHOD__ );
1802                         return false;
1803                 }
1804
1805                 // The current state, we want to merge updates into it
1806                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1807                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
1808
1809                 if ( is_null( $currentContent ) ) {
1810                         wfProfileOut( __METHOD__ );
1811                         return false;
1812                 }
1813
1814                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
1815
1816                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
1817
1818                 if ( $result ) {
1819                         $editContent = $result;
1820                         wfProfileOut( __METHOD__ );
1821                         return true;
1822                 }
1823
1824                 wfProfileOut( __METHOD__ );
1825                 return false;
1826         }
1827
1828         /**
1829          * @return Revision
1830          */
1831         function getBaseRevision() {
1832                 if ( !$this->mBaseRevision ) {
1833                         $db = wfGetDB( DB_MASTER );
1834                         $baseRevision = Revision::loadFromTimestamp(
1835                                 $db, $this->mTitle, $this->edittime );
1836                         return $this->mBaseRevision = $baseRevision;
1837                 } else {
1838                         return $this->mBaseRevision;
1839                 }
1840         }
1841
1842         /**
1843          * Check given input text against $wgSpamRegex, and return the text of the first match.
1844          *
1845          * @param $text string
1846          *
1847          * @return string|bool matching string or false
1848          */
1849         public static function matchSpamRegex( $text ) {
1850                 global $wgSpamRegex;
1851                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1852                 $regexes = (array)$wgSpamRegex;
1853                 return self::matchSpamRegexInternal( $text, $regexes );
1854         }
1855
1856         /**
1857          * Check given input text against $wgSpamRegex, and return the text of the first match.
1858          *
1859          * @param $text string
1860          *
1861          * @return string|bool  matching string or false
1862          */
1863         public static function matchSummarySpamRegex( $text ) {
1864                 global $wgSummarySpamRegex;
1865                 $regexes = (array)$wgSummarySpamRegex;
1866                 return self::matchSpamRegexInternal( $text, $regexes );
1867         }
1868
1869         /**
1870          * @param $text string
1871          * @param $regexes array
1872          * @return bool|string
1873          */
1874         protected static function matchSpamRegexInternal( $text, $regexes ) {
1875                 foreach ( $regexes as $regex ) {
1876                         $matches = array();
1877                         if ( preg_match( $regex, $text, $matches ) ) {
1878                                 return $matches[0];
1879                         }
1880                 }
1881                 return false;
1882         }
1883
1884         function setHeaders() {
1885                 global $wgOut, $wgUser;
1886
1887                 $wgOut->addModules( 'mediawiki.action.edit' );
1888
1889                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
1890                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
1891                 }
1892                 // Bug #19334: textarea jumps when editing articles in IE8
1893                 $wgOut->addStyle( 'common/IE80Fixes.css', 'screen', 'IE 8' );
1894
1895                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1896
1897                 # Enabled article-related sidebar, toplinks, etc.
1898                 $wgOut->setArticleRelated( true );
1899
1900                 $contextTitle = $this->getContextTitle();
1901                 if ( $this->isConflict ) {
1902                         $msg = 'editconflict';
1903                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
1904                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1905                 } else {
1906                         $msg = $contextTitle->exists() || ( $contextTitle->getNamespace() == NS_MEDIAWIKI && $contextTitle->getDefaultMessageText() !== false ) ?
1907                                 'editing' : 'creating';
1908                 }
1909                 # Use the title defined by DISPLAYTITLE magic word when present
1910                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
1911                 if ( $displayTitle === false ) {
1912                         $displayTitle = $contextTitle->getPrefixedText();
1913                 }
1914                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
1915         }
1916
1917         /**
1918          * Show all applicable editing introductions
1919          */
1920         protected function showIntro() {
1921                 global $wgOut, $wgUser;
1922                 if ( $this->suppressIntro ) {
1923                         return;
1924                 }
1925
1926                 $namespace = $this->mTitle->getNamespace();
1927
1928                 if ( $namespace == NS_MEDIAWIKI ) {
1929                         # Show a warning if editing an interface message
1930                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
1931                 } else if( $namespace == NS_FILE ) {
1932                         # Show a hint to shared repo
1933                         $file = wfFindFile( $this->mTitle );
1934                         if( $file && !$file->isLocal() ) {
1935                                 $descUrl = $file->getDescriptionUrl();
1936                                 # there must be a description url to show a hint to shared repo
1937                                 if( $descUrl ) {
1938                                         if( !$this->mTitle->exists() ) {
1939                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array (
1940                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
1941                                                 ) );
1942                                         } else {
1943                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
1944                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
1945                                                 ) );
1946                                         }
1947                                 }
1948                         }
1949                 }
1950
1951                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
1952                 # Show log extract when the user is currently blocked
1953                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
1954                         $parts = explode( '/', $this->mTitle->getText(), 2 );
1955                         $username = $parts[0];
1956                         $user = User::newFromName( $username, false /* allow IP users*/ );
1957                         $ip = User::isIP( $username );
1958                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
1959                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
1960                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
1961                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
1962                                 LogEventsList::showLogExtract(
1963                                         $wgOut,
1964                                         'block',
1965                                         $user->getUserPage(),
1966                                         '',
1967                                         array(
1968                                                 'lim' => 1,
1969                                                 'showIfEmpty' => false,
1970                                                 'msgKey' => array(
1971                                                         'blocked-notice-logextract',
1972                                                         $user->getName() # Support GENDER in notice
1973                                                 )
1974                                         )
1975                                 );
1976                         }
1977                 }
1978                 # Try to add a custom edit intro, or use the standard one if this is not possible.
1979                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
1980                         if ( $wgUser->isLoggedIn() ) {
1981                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
1982                         } else {
1983                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
1984                         }
1985                 }
1986                 # Give a notice if the user is editing a deleted/moved page...
1987                 if ( !$this->mTitle->exists() ) {
1988                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
1989                                 '',
1990                                 array(
1991                                         'lim' => 10,
1992                                         'conds' => array( "log_action != 'revision'" ),
1993                                         'showIfEmpty' => false,
1994                                         'msgKey' => array( 'recreate-moveddeleted-warn' )
1995                                 )
1996                         );
1997                 }
1998         }
1999
2000         /**
2001          * Attempt to show a custom editing introduction, if supplied
2002          *
2003          * @return bool
2004          */
2005         protected function showCustomIntro() {
2006                 if ( $this->editintro ) {
2007                         $title = Title::newFromText( $this->editintro );
2008                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2009                                 global $wgOut;
2010                                 // Added using template syntax, to take <noinclude>'s into account.
2011                                 $wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
2012                                 return true;
2013                         }
2014                 }
2015                 return false;
2016         }
2017
2018         /**
2019          * Gets an editable textual representation of $content.
2020          * The textual representation can be turned by into a Content object by the
2021          * toEditContent() method.
2022          *
2023          * If $content is null or false or a string, $content is returned unchanged.
2024          *
2025          * If the given Content object is not of a type that can be edited using the text base EditPage,
2026          * an exception will be raised. Set $this->allowNonTextContent to true to allow editing of non-textual
2027          * content.
2028          *
2029          * @param Content|null|bool|string $content
2030          * @return String the editable text form of the content.
2031          *
2032          * @throws MWException if $content is not an instance of TextContent and $this->allowNonTextContent is not true.
2033          */
2034         protected function toEditText( $content ) {
2035                 if ( $content === null || $content === false ) {
2036                         return $content;
2037                 }
2038
2039                 if ( is_string( $content ) ) {
2040                         return $content;
2041                 }
2042
2043                 if ( !$this->allowNonTextContent && !( $content instanceof TextContent ) ) {
2044                         throw new MWException( "This content model can not be edited as text: "
2045                                                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2046                 }
2047
2048                 return $content->serialize( $this->contentFormat );
2049         }
2050
2051         /**
2052          * Turns the given text into a Content object by unserializing it.
2053          *
2054          * If the resulting Content object is not of a type that can be edited using the text base EditPage,
2055          * an exception will be raised. Set $this->allowNonTextContent to true to allow editing of non-textual
2056          * content.
2057          *
2058          * @param String|null|bool $text Text to unserialize
2059          * @return Content The content object created from $text. If $text was false or null, false resp. null will be
2060          *                 returned instead.
2061          *
2062          * @throws MWException if unserializing the text results in a Content object that is not an instance of TextContent
2063          *          and $this->allowNonTextContent is not true.
2064          */
2065         protected function toEditContent( $text ) {
2066                 if ( $text === false || $text === null ) {
2067                         return $text;
2068                 }
2069
2070                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2071                         $this->contentModel, $this->contentFormat );
2072
2073                 if ( !$this->allowNonTextContent && !( $content instanceof TextContent ) ) {
2074                         throw new MWException( "This content model can not be edited as text: "
2075                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2076                 }
2077
2078                 return $content;
2079         }
2080
2081         /**
2082          * Send the edit form and related headers to $wgOut
2083          * @param $formCallback Callback|null that takes an OutputPage parameter; will be called
2084          *     during form output near the top, for captchas and the like.
2085          */
2086         function showEditForm( $formCallback = null ) {
2087                 global $wgOut, $wgUser;
2088
2089                 wfProfileIn( __METHOD__ );
2090
2091                 # need to parse the preview early so that we know which templates are used,
2092                 # otherwise users with "show preview after edit box" will get a blank list
2093                 # we parse this near the beginning so that setHeaders can do the title
2094                 # setting work instead of leaving it in getPreviewText
2095                 $previewOutput = '';
2096                 if ( $this->formtype == 'preview' ) {
2097                         $previewOutput = $this->getPreviewText();
2098                 }
2099
2100                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
2101
2102                 $this->setHeaders();
2103
2104                 if ( $this->showHeader() === false ) {
2105                         wfProfileOut( __METHOD__ );
2106                         return;
2107                 }
2108
2109                 $wgOut->addHTML( $this->editFormPageTop );
2110
2111                 if ( $wgUser->getOption( 'previewontop' ) ) {
2112                         $this->displayPreviewArea( $previewOutput, true );
2113                 }
2114
2115                 $wgOut->addHTML( $this->editFormTextTop );
2116
2117                 $showToolbar = true;
2118                 if ( $this->wasDeletedSinceLastEdit() ) {
2119                         if ( $this->formtype == 'save' ) {
2120                                 // Hide the toolbar and edit area, user can click preview to get it back
2121                                 // Add an confirmation checkbox and explanation.
2122                                 $showToolbar = false;
2123                         } else {
2124                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2125                                         'deletedwhileediting' );
2126                         }
2127                 }
2128
2129                 //@todo: add EditForm plugin interface and use it here!
2130                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2131                 $wgOut->addHTML( Html::openElement( 'form', array( 'id' => self::EDITFORM_ID, 'name' => self::EDITFORM_ID,
2132                         'method' => 'post', 'action' => $this->getActionURL( $this->getContextTitle() ),
2133                         'enctype' => 'multipart/form-data' ) ) );
2134
2135                 if ( is_callable( $formCallback ) ) {
2136                         call_user_func_array( $formCallback, array( &$wgOut ) );
2137                 }
2138
2139                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
2140
2141                 // Put these up at the top to ensure they aren't lost on early form submission
2142                 $this->showFormBeforeText();
2143
2144                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2145                         $username = $this->lastDelete->user_name;
2146                         $comment = $this->lastDelete->log_comment;
2147
2148                         // It is better to not parse the comment at all than to have templates expanded in the middle
2149                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2150                         $key = $comment === ''
2151                                 ? 'confirmrecreate-noreason'
2152                                 : 'confirmrecreate';
2153                         $wgOut->addHTML(
2154                                 '<div class="mw-confirm-recreate">' .
2155                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2156                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2157                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2158                                 ) .
2159                                 '</div>'
2160                         );
2161                 }
2162
2163                 # When the summary is hidden, also hide them on preview/show changes
2164                 if( $this->nosummary ) {
2165                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2166                 }
2167
2168                 # If a blank edit summary was previously provided, and the appropriate
2169                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2170                 # user being bounced back more than once in the event that a summary
2171                 # is not required.
2172                 #####
2173                 # For a bit more sophisticated detection of blank summaries, hash the
2174                 # automatic one and pass that in the hidden field wpAutoSummary.
2175                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2176                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2177                 }
2178
2179                 if ( $this->undidRev ) {
2180                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2181                 }
2182
2183                 if ( $this->hasPresetSummary ) {
2184                         // If a summary has been preset using &summary= we dont want to prompt for
2185                         // a different summary. Only prompt for a summary if the summary is blanked.
2186                         // (Bug 17416)
2187                         $this->autoSumm = md5( '' );
2188                 }
2189
2190                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2191                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2192
2193                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2194
2195                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2196                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2197
2198                 if ( $this->section == 'new' ) {
2199                         $this->showSummaryInput( true, $this->summary );
2200                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2201                 }
2202
2203                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2204
2205                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2206                         $wgOut->addHTML( EditPage::getEditToolbar() );
2207                 }
2208
2209                 if ( $this->isConflict ) {
2210                         // In an edit conflict bypass the overrideable content form method
2211                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2212                         // resolved between page source edits and custom ui edits using the
2213                         // custom edit ui.
2214                         $this->textbox2 = $this->textbox1;
2215
2216                         $content = $this->getCurrentContent();
2217                         $this->textbox1 = $this->toEditText( $content );
2218
2219                         $this->showTextbox1();
2220                 } else {
2221                         $this->showContentForm();
2222                 }
2223
2224                 $wgOut->addHTML( $this->editFormTextAfterContent );
2225
2226                 $this->showStandardInputs();
2227
2228                 $this->showFormAfterText();
2229
2230                 $this->showTosSummary();
2231
2232                 $this->showEditTools();
2233
2234                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2235
2236                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2237                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2238
2239                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2240                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2241
2242                 if ( $this->isConflict ) {
2243                         try {
2244                                 $this->showConflict();
2245                         } catch ( MWContentSerializationException $ex ) {
2246                                 // this can't really happen, but be nice if it does.
2247                                 $msg = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
2248                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2249                         }
2250                 }
2251
2252                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2253
2254                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2255                         $this->displayPreviewArea( $previewOutput, false );
2256                 }
2257
2258                 wfProfileOut( __METHOD__ );
2259         }
2260
2261         /**
2262          * Extract the section title from current section text, if any.
2263          *
2264          * @param string $text
2265          * @return Mixed|string or false
2266          */
2267         public static function extractSectionTitle( $text ) {
2268                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2269                 if ( !empty( $matches[2] ) ) {
2270                         global $wgParser;
2271                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2272                 } else {
2273                         return false;
2274                 }
2275         }
2276
2277         protected function showHeader() {
2278                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2279
2280                 if ( $this->mTitle->isTalkPage() ) {
2281                         $wgOut->addWikiMsg( 'talkpagetext' );
2282                 }
2283
2284                 // Add edit notices
2285                 $wgOut->addHTML( implode( "\n", $this->mTitle->getEditNotices() ) );
2286
2287                 if ( $this->isConflict ) {
2288                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2289                         $this->edittime = $this->mArticle->getTimestamp();
2290                 } else {
2291                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2292                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2293                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2294                                 // Someone is welcome to try refactoring though
2295                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2296                                 return false;
2297                         }
2298
2299                         if ( $this->section != '' && $this->section != 'new' ) {
2300                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2301                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); //FIXME: use Content object
2302                                         if ( $sectionTitle !== false ) {
2303                                                 $this->summary = "/* $sectionTitle */ ";
2304                                         }
2305                                 }
2306                         }
2307
2308                         if ( $this->missingComment ) {
2309                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2310                         }
2311
2312                         if ( $this->missingSummary && $this->section != 'new' ) {
2313                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2314                         }
2315
2316                         if ( $this->missingSummary && $this->section == 'new' ) {
2317                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2318                         }
2319
2320                         if ( $this->hookError !== '' ) {
2321                                 $wgOut->addWikiText( $this->hookError );
2322                         }
2323
2324                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2325                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2326                         }
2327
2328                         if ( $this->section != 'new' ) {
2329                                 $revision = $this->mArticle->getRevisionFetched();
2330                                 if ( $revision ) {
2331                                         // Let sysop know that this will make private content public if saved
2332
2333                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2334                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
2335                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2336                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
2337                                         }
2338
2339                                         if ( !$revision->isCurrent() ) {
2340                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2341                                                 $wgOut->addWikiMsg( 'editingold' );
2342                                         }
2343                                 } elseif ( $this->mTitle->exists() ) {
2344                                         // Something went wrong
2345
2346                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2347                                                 array( 'missing-revision', $this->oldid ) );
2348                                 }
2349                         }
2350                 }
2351
2352                 if ( wfReadOnly() ) {
2353                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
2354                 } elseif ( $wgUser->isAnon() ) {
2355                         if ( $this->formtype != 'preview' ) {
2356                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
2357                         } else {
2358                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
2359                         }
2360                 } else {
2361                         if ( $this->isCssJsSubpage ) {
2362                                 # Check the skin exists
2363                                 if ( $this->isWrongCaseCssJsPage ) {
2364                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
2365                                 }
2366                                 if ( $this->formtype !== 'preview' ) {
2367                                         if ( $this->isCssSubpage ) {
2368                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
2369                                         }
2370
2371                                         if ( $this->isJsSubpage ) {
2372                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
2373                                         }
2374                                 }
2375                         }
2376                 }
2377
2378                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2379                         # Is the title semi-protected?
2380                         if ( $this->mTitle->isSemiProtected() ) {
2381                                 $noticeMsg = 'semiprotectedpagewarning';
2382                         } else {
2383                                 # Then it must be protected based on static groups (regular)
2384                                 $noticeMsg = 'protectedpagewarning';
2385                         }
2386                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2387                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2388                 }
2389                 if ( $this->mTitle->isCascadeProtected() ) {
2390                         # Is this page under cascading protection from some source pages?
2391                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2392                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2393                         $cascadeSourcesCount = count( $cascadeSources );
2394                         if ( $cascadeSourcesCount > 0 ) {
2395                                 # Explain, and list the titles responsible
2396                                 foreach ( $cascadeSources as $page ) {
2397                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2398                                 }
2399                         }
2400                         $notice .= '</div>';
2401                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2402                 }
2403                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2404                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2405                                 array( 'lim' => 1,
2406                                         'showIfEmpty' => false,
2407                                         'msgKey' => array( 'titleprotectedwarning' ),
2408                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2409                 }
2410
2411                 if ( $this->kblength === false ) {
2412                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2413                 }
2414
2415                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2416                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2417                                 array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
2418                 } else {
2419                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2420                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2421                                         array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
2422                                 );
2423                         }
2424                 }
2425                 # Add header copyright warning
2426                 $this->showHeaderCopyrightWarning();
2427         }
2428
2429         /**
2430          * Standard summary input and label (wgSummary), abstracted so EditPage
2431          * subclasses may reorganize the form.
2432          * Note that you do not need to worry about the label's for=, it will be
2433          * inferred by the id given to the input. You can remove them both by
2434          * passing array( 'id' => false ) to $userInputAttrs.
2435          *
2436          * @param $summary string The value of the summary input
2437          * @param $labelText string The html to place inside the label
2438          * @param $inputAttrs array of attrs to use on the input
2439          * @param $spanLabelAttrs array of attrs to use on the span inside the label
2440          *
2441          * @return array An array in the format array( $label, $input )
2442          */
2443         function getSummaryInput( $summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null ) {
2444                 // Note: the maxlength is overriden in JS to 255 and to make it use UTF-8 bytes, not characters.
2445                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2446                         'id' => 'wpSummary',
2447                         'maxlength' => '200',
2448                         'tabindex' => '1',
2449                         'size' => 60,
2450                         'spellcheck' => 'true',
2451                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2452
2453                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2454                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2455                         'id' => "wpSummaryLabel"
2456                 );
2457
2458                 $label = null;
2459                 if ( $labelText ) {
2460                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
2461                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2462                 }
2463
2464                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2465
2466                 return array( $label, $input );
2467         }
2468
2469         /**
2470          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2471          *                          up top, or false if this is the comment summary
2472          *                          down below the textarea
2473          * @param $summary String: The text of the summary to display
2474          * @return String
2475          */
2476         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2477                 global $wgOut, $wgContLang;
2478                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2479                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2480                 if ( $isSubjectPreview ) {
2481                         if ( $this->nosummary ) {
2482                                 return;
2483                         }
2484                 } else {
2485                         if ( !$this->mShowSummaryField ) {
2486                                 return;
2487                         }
2488                 }
2489                 $summary = $wgContLang->recodeForEdit( $summary );
2490                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2491                 list( $label, $input ) = $this->getSummaryInput( $summary, $labelText, array( 'class' => $summaryClass ), array() );
2492                 $wgOut->addHTML( "{$label} {$input}" );
2493         }
2494
2495         /**
2496          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2497          *                          up top, or false if this is the comment summary
2498          *                          down below the textarea
2499          * @param $summary String: the text of the summary to display
2500          * @return String
2501          */
2502         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2503                 // avoid spaces in preview, gets always trimmed on save
2504                 $summary = trim( $summary );
2505                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
2506                         return "";
2507                 }
2508
2509                 global $wgParser;
2510
2511                 if ( $isSubjectPreview ) {
2512                         $summary = wfMessage( 'newsectionsummary', $wgParser->stripSectionName( $summary ) )
2513                                 ->inContentLanguage()->text();
2514                 }
2515
2516                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2517
2518                 $summary = wfMessage( $message )->parse() . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2519                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2520         }
2521
2522         protected function showFormBeforeText() {
2523                 global $wgOut;
2524                 $section = htmlspecialchars( $this->section );
2525                 $wgOut->addHTML( <<<HTML
2526 <input type='hidden' value="{$section}" name="wpSection" />
2527 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2528 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2529 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2530
2531 HTML
2532                 );
2533                 if ( !$this->checkUnicodeCompliantBrowser() ) {
2534                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2535                 }
2536         }
2537
2538         protected function showFormAfterText() {
2539                 global $wgOut, $wgUser;
2540                 /**
2541                  * To make it harder for someone to slip a user a page
2542                  * which submits an edit form to the wiki without their
2543                  * knowledge, a random token is associated with the login
2544                  * session. If it's not passed back with the submission,
2545                  * we won't save the page, or render user JavaScript and
2546                  * CSS previews.
2547                  *
2548                  * For anon editors, who may not have a session, we just
2549                  * include the constant suffix to prevent editing from
2550                  * broken text-mangling proxies.
2551                  */
2552                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2553         }
2554
2555         /**
2556          * Subpage overridable method for printing the form for page content editing
2557          * By default this simply outputs wpTextbox1
2558          * Subclasses can override this to provide a custom UI for editing;
2559          * be it a form, or simply wpTextbox1 with a modified content that will be
2560          * reverse modified when extracted from the post data.
2561          * Note that this is basically the inverse for importContentFormData
2562          */
2563         protected function showContentForm() {
2564                 $this->showTextbox1();
2565         }
2566
2567         /**
2568          * Method to output wpTextbox1
2569          * The $textoverride method can be used by subclasses overriding showContentForm
2570          * to pass back to this method.
2571          *
2572          * @param $customAttribs array of html attributes to use in the textarea
2573          * @param $textoverride String: optional text to override $this->textarea1 with
2574          */
2575         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2576                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2577                         $attribs = array( 'style' => 'display:none;' );
2578                 } else {
2579                         $classes = array(); // Textarea CSS
2580                         if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2581                                 # Is the title semi-protected?
2582                                 if ( $this->mTitle->isSemiProtected() ) {
2583                                         $classes[] = 'mw-textarea-sprotected';
2584                                 } else {
2585                                         # Then it must be protected based on static groups (regular)
2586                                         $classes[] = 'mw-textarea-protected';
2587                                 }
2588                                 # Is the title cascade-protected?
2589                                 if ( $this->mTitle->isCascadeProtected() ) {
2590                                         $classes[] = 'mw-textarea-cprotected';
2591                                 }
2592                         }
2593
2594                         $attribs = array( 'tabindex' => 1 );
2595
2596                         if ( is_array( $customAttribs ) ) {
2597                                 $attribs += $customAttribs;
2598                         }
2599
2600                         if ( count( $classes ) ) {
2601                                 if ( isset( $attribs['class'] ) ) {
2602                                         $classes[] = $attribs['class'];
2603                                 }
2604                                 $attribs['class'] = implode( ' ', $classes );
2605                         }
2606                 }
2607
2608                 $this->showTextbox( $textoverride !== null ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
2609         }
2610
2611         protected function showTextbox2() {
2612                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2613         }
2614
2615         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2616                 global $wgOut, $wgUser;
2617
2618                 $wikitext = $this->safeUnicodeOutput( $text );
2619                 if ( strval( $wikitext ) !== '' ) {
2620                         // Ensure there's a newline at the end, otherwise adding lines
2621                         // is awkward.
2622                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2623                         // mode will show an extra newline. A bit annoying.
2624                         $wikitext .= "\n";
2625                 }
2626
2627                 $attribs = $customAttribs + array(
2628                         'accesskey' => ',',
2629                         'id'   => $name,
2630                         'cols' => $wgUser->getIntOption( 'cols' ),
2631                         'rows' => $wgUser->getIntOption( 'rows' ),
2632                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
2633                 );
2634
2635                 $pageLang = $this->mTitle->getPageLanguage();
2636                 $attribs['lang'] = $pageLang->getCode();
2637                 $attribs['dir'] = $pageLang->getDir();
2638
2639                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2640         }
2641
2642         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2643                 global $wgOut;
2644                 $classes = array();
2645                 if ( $isOnTop ) {
2646                         $classes[] = 'ontop';
2647                 }
2648
2649                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2650
2651                 if ( $this->formtype != 'preview' ) {
2652                         $attribs['style'] = 'display: none;';
2653                 }
2654
2655                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2656
2657                 if ( $this->formtype == 'preview' ) {
2658                         $this->showPreview( $previewOutput );
2659                 }
2660
2661                 $wgOut->addHTML( '</div>' );
2662
2663                 if ( $this->formtype == 'diff' ) {
2664                         try {
2665                                 $this->showDiff();
2666                         } catch ( MWContentSerializationException $ex ) {
2667                                 $msg = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
2668                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2669                         }
2670                 }
2671         }
2672
2673         /**
2674          * Append preview output to $wgOut.
2675          * Includes category rendering if this is a category page.
2676          *
2677          * @param $text String: the HTML to be output for the preview.
2678          */
2679         protected function showPreview( $text ) {
2680                 global $wgOut;
2681                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2682                         $this->mArticle->openShowCategory();
2683                 }
2684                 # This hook seems slightly odd here, but makes things more
2685                 # consistent for extensions.
2686                 wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
2687                 $wgOut->addHTML( $text );
2688                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2689                         $this->mArticle->closeShowCategory();
2690                 }
2691         }
2692
2693         /**
2694          * Get a diff between the current contents of the edit box and the
2695          * version of the page we're editing from.
2696          *
2697          * If this is a section edit, we'll replace the section as for final
2698          * save and then make a comparison.
2699          */
2700         function showDiff() {
2701                 global $wgUser, $wgContLang, $wgOut;
2702
2703                 $oldtitlemsg = 'currentrev';
2704                 # if message does not exist, show diff against the preloaded default
2705                 if( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
2706                         $oldtext = $this->mTitle->getDefaultMessageText();
2707                         if( $oldtext !== false ) {
2708                                 $oldtitlemsg = 'defaultmessagetext';
2709                                 $oldContent = $this->toEditContent( $oldtext );
2710                         } else {
2711                                 $oldContent = null;
2712                         }
2713                 } else {
2714                         $oldContent = $this->getCurrentContent();
2715                 }
2716
2717                 $textboxContent = $this->toEditContent( $this->textbox1 );
2718
2719                 $newContent = $this->mArticle->replaceSectionContent(
2720                                                         $this->section, $textboxContent,
2721                                                         $this->summary, $this->edittime );
2722
2723                 if ( $newContent ) {
2724                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
2725                         wfRunHooks( 'EditPageGetDiffContent', array( $this, &$newContent ) );
2726
2727                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
2728                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
2729                 }
2730
2731                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
2732                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
2733                         $newtitle = wfMessage( 'yourtext' )->parse();
2734
2735                         if ( !$oldContent ) {
2736                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
2737                         }
2738
2739                         if ( !$newContent ) {
2740                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
2741                         }
2742
2743                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
2744                         $de->setContent( $oldContent, $newContent );
2745
2746                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2747                         $de->showDiffStyle();
2748                 } else {
2749                         $difftext = '';
2750                 }
2751
2752                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2753         }
2754
2755         /**
2756          * Show the header copyright warning.
2757          */
2758         protected function showHeaderCopyrightWarning() {
2759                 $msg = 'editpage-head-copy-warn';
2760                 if ( !wfMessage( $msg )->isDisabled() ) {
2761                         global $wgOut;
2762                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
2763                                 'editpage-head-copy-warn' );
2764                 }
2765         }
2766
2767         /**
2768          * Give a chance for site and per-namespace customizations of
2769          * terms of service summary link that might exist separately
2770          * from the copyright notice.
2771          *
2772          * This will display between the save button and the edit tools,
2773          * so should remain short!
2774          */
2775         protected function showTosSummary() {
2776                 $msg = 'editpage-tos-summary';
2777                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
2778                 if ( !wfMessage( $msg )->isDisabled() ) {
2779                         global $wgOut;
2780                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
2781                         $wgOut->addWikiMsg( $msg );
2782                         $wgOut->addHTML( '</div>' );
2783                 }
2784         }
2785
2786         protected function showEditTools() {
2787                 global $wgOut;
2788                 $wgOut->addHTML( '<div class="mw-editTools">' .
2789                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
2790                         '</div>' );
2791         }
2792
2793         /**
2794          * Get the copyright warning
2795          *
2796          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
2797          */
2798         protected function getCopywarn() {
2799                 return self::getCopyrightWarning( $this->mTitle );
2800         }
2801
2802         public static function getCopyrightWarning( $title ) {
2803                 global $wgRightsText;
2804                 if ( $wgRightsText ) {
2805                         $copywarnMsg = array( 'copyrightwarning',
2806                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
2807                                 $wgRightsText );
2808                 } else {
2809                         $copywarnMsg = array( 'copyrightwarning2',
2810                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
2811                 }
2812                 // Allow for site and per-namespace customization of contribution/copyright notice.
2813                 wfRunHooks( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
2814
2815                 return "<div id=\"editpage-copywarn\">\n" .
2816                         call_user_func_array( 'wfMessage', $copywarnMsg )->plain() . "\n</div>";
2817         }
2818
2819         protected function showStandardInputs( &$tabindex = 2 ) {
2820                 global $wgOut;
2821                 $wgOut->addHTML( "<div class='editOptions'>\n" );
2822
2823                 if ( $this->section != 'new' ) {
2824                         $this->showSummaryInput( false, $this->summary );
2825                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
2826                 }
2827
2828                 $checkboxes = $this->getCheckboxes( $tabindex,
2829                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
2830                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
2831
2832                 // Show copyright warning.
2833                 $wgOut->addWikiText( $this->getCopywarn() );
2834                 $wgOut->addHTML( $this->editFormTextAfterWarn );
2835
2836                 $wgOut->addHTML( "<div class='editButtons'>\n" );
2837                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
2838
2839                 $cancel = $this->getCancelLink();
2840                 if ( $cancel !== '' ) {
2841                         $cancel .= wfMessage( 'pipe-separator' )->text();
2842                 }
2843                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMessage( 'edithelppage' )->inContentLanguage()->text() );
2844                 $edithelp = '<a target="helpwindow" href="' . $edithelpurl . '">' .
2845                         wfMessage( 'edithelp' )->escaped() . '</a> ' .
2846                         wfMessage( 'newwindow' )->parse();
2847                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
2848                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
2849                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
2850                 wfRunHooks( 'EditPage::showStandardInputs:options', array( $this, $wgOut, &$tabindex ) );
2851                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
2852         }
2853
2854         /**
2855          * Show an edit conflict. textbox1 is already shown in showEditForm().
2856          * If you want to use another entry point to this function, be careful.
2857          */
2858         protected function showConflict() {
2859                 global $wgOut;
2860
2861                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
2862                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2863
2864                         $content1 = $this->toEditContent( $this->textbox1 );
2865                         $content2 = $this->toEditContent( $this->textbox2 );
2866
2867                         $handler = ContentHandler::getForModelID( $this->contentModel );
2868                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
2869                         $de->setContent( $content2, $content1 );
2870                         $de->showDiff(
2871                                 wfMessage( 'yourtext' )->parse(),
2872                                 wfMessage( 'storedversion' )->text()
2873                         );
2874
2875                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2876                         $this->showTextbox2();
2877                 }
2878         }
2879
2880         /**
2881          * @return string
2882          */
2883         public function getCancelLink() {
2884                 $cancelParams = array();
2885                 if ( !$this->isConflict && $this->oldid > 0 ) {
2886                         $cancelParams['oldid'] = $this->oldid;
2887                 }
2888
2889                 return Linker::linkKnown(
2890                         $this->getContextTitle(),
2891                         wfMessage( 'cancel' )->parse(),
2892                         array( 'id' => 'mw-editform-cancel' ),
2893                         $cancelParams
2894                 );
2895         }
2896
2897         /**
2898          * Returns the URL to use in the form's action attribute.
2899          * This is used by EditPage subclasses when simply customizing the action
2900          * variable in the constructor is not enough. This can be used when the
2901          * EditPage lives inside of a Special page rather than a custom page action.
2902          *
2903          * @param $title Title object for which is being edited (where we go to for &action= links)
2904          * @return string
2905          */
2906         protected function getActionURL( Title $title ) {
2907                 return $title->getLocalURL( array( 'action' => $this->action ) );
2908         }
2909
2910         /**
2911          * Check if a page was deleted while the user was editing it, before submit.
2912          * Note that we rely on the logging table, which hasn't been always there,
2913          * but that doesn't matter, because this only applies to brand new
2914          * deletes.
2915          */
2916         protected function wasDeletedSinceLastEdit() {
2917                 if ( $this->deletedSinceEdit !== null ) {
2918                         return $this->deletedSinceEdit;
2919                 }
2920
2921                 $this->deletedSinceEdit = false;
2922
2923                 if ( $this->mTitle->isDeletedQuick() ) {
2924                         $this->lastDelete = $this->getLastDelete();
2925                         if ( $this->lastDelete ) {
2926                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
2927                                 if ( $deleteTime > $this->starttime ) {
2928                                         $this->deletedSinceEdit = true;
2929                                 }
2930                         }
2931                 }
2932
2933                 return $this->deletedSinceEdit;
2934         }
2935
2936         protected function getLastDelete() {
2937                 $dbr = wfGetDB( DB_SLAVE );
2938                 $data = $dbr->selectRow(
2939                         array( 'logging', 'user' ),
2940                         array(
2941                                 'log_type',
2942                                 'log_action',
2943                                 'log_timestamp',
2944                                 'log_user',
2945                                 'log_namespace',
2946                                 'log_title',
2947                                 'log_comment',
2948                                 'log_params',
2949                                 'log_deleted',
2950                                 'user_name'
2951                         ), array(
2952                                 'log_namespace' => $this->mTitle->getNamespace(),
2953                                 'log_title' => $this->mTitle->getDBkey(),
2954                                 'log_type' => 'delete',
2955                                 'log_action' => 'delete',
2956                                 'user_id=log_user'
2957                         ),
2958                         __METHOD__,
2959                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
2960                 );
2961                 // Quick paranoid permission checks...
2962                 if ( is_object( $data ) ) {
2963                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
2964                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
2965                         }
2966
2967                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
2968                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
2969                         }
2970                 }
2971                 return $data;
2972         }
2973
2974         /**
2975          * Get the rendered text for previewing.
2976          * @throws MWException
2977          * @return string
2978          */
2979         function getPreviewText() {
2980                 global $wgOut, $wgUser, $wgRawHtml, $wgLang;
2981
2982                 wfProfileIn( __METHOD__ );
2983
2984                 if ( $wgRawHtml && !$this->mTokenOk ) {
2985                         // Could be an offsite preview attempt. This is very unsafe if
2986                         // HTML is enabled, as it could be an attack.
2987                         $parsedNote = '';
2988                         if ( $this->textbox1 !== '' ) {
2989                                 // Do not put big scary notice, if previewing the empty
2990                                 // string, which happens when you initially edit
2991                                 // a category page, due to automatic preview-on-open.
2992                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
2993                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
2994                         }
2995                         wfProfileOut( __METHOD__ );
2996                         return $parsedNote;
2997                 }
2998
2999                 $note = '';
3000
3001                 try {
3002                         $content = $this->toEditContent( $this->textbox1 );
3003
3004                         $previewHTML = '';
3005                         if ( !wfRunHooks( 'AlternateEditPreview', array( $this, &$content, &$previewHTML, &$this->mParserOutput ) ) ) {
3006                                 wfProfileOut( __METHOD__ );
3007                                 return $previewHTML;
3008                         }
3009
3010                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3011                                 if ( $this->mTokenOkExceptSuffix ) {
3012                                         $note = wfMessage( 'token_suffix_mismatch' )->plain();
3013
3014                                 } else {
3015                                         $note = wfMessage( 'session_fail_preview' )->plain();
3016                                 }
3017                         } elseif ( $this->incompleteForm ) {
3018                                 $note = wfMessage( 'edit_form_incomplete' )->plain();
3019                         } else {
3020                                 $note = wfMessage( 'previewnote' )->plain() .
3021                                         ' [[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' . wfMessage( 'continue-editing' )->text() . ']]';
3022                         }
3023
3024                         $parserOptions = $this->mArticle->makeParserOptions( $this->mArticle->getContext() );
3025                         $parserOptions->setEditSection( false );
3026                         $parserOptions->setIsPreview( true );
3027                         $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3028
3029                         # don't parse non-wikitext pages, show message about preview
3030                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3031                                 if( $this->mTitle->isCssJsSubpage() ) {
3032                                         $level = 'user';
3033                                 } elseif( $this->mTitle->isCssOrJsPage() ) {
3034                                         $level = 'site';
3035                                 } else {
3036                                         $level = false;
3037                                 }
3038
3039                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3040                                         $format = 'css';
3041                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3042                                         $format = 'js';
3043                                 } else {
3044                                         $format = false;
3045                                 }
3046
3047                                 # Used messages to make sure grep find them:
3048                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3049                                 if( $level && $format ) {
3050                                         $note = "<div id='mw-{$level}{$format}preview'>" . wfMessage( "{$level}{$format}preview" )->text() . "</div>";
3051                                 }
3052                         }
3053
3054                         $rt = $content->getRedirectChain();
3055                         if ( $rt ) {
3056                                 $previewHTML = $this->mArticle->viewRedirect( $rt, false );
3057                         } else {
3058
3059                                 # If we're adding a comment, we need to show the
3060                                 # summary as the headline
3061                                 if ( $this->section === "new" && $this->summary !== "" ) {
3062                                         $content = $content->addSectionHeader( $this->summary );
3063                                 }
3064
3065                                 $hook_args = array( $this, &$content );
3066                                 ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
3067                                 wfRunHooks( 'EditPageGetPreviewContent', $hook_args );
3068
3069                                 $parserOptions->enableLimitReport();
3070
3071                                 # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
3072                                 # But it's now deprecated, so never mind
3073
3074                                 $content = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3075                                 $parserOutput = $content->getParserOutput( $this->getArticle()->getTitle(), null, $parserOptions );
3076
3077                                 $previewHTML = $parserOutput->getText();
3078                                 $this->mParserOutput = $parserOutput;
3079                                 $wgOut->addParserOutputNoText( $parserOutput );
3080
3081                                 if ( count( $parserOutput->getWarnings() ) ) {
3082                                         $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3083                                 }
3084                         }
3085                 } catch ( MWContentSerializationException $ex ) {
3086                         $m = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
3087                         $note .= "\n\n" . $m->parse();
3088                         $previewHTML = '';
3089                 }
3090
3091                 if ( $this->isConflict ) {
3092                         $conflict = '<h2 id="mw-previewconflict">' . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
3093                 } else {
3094                         $conflict = '<hr />';
3095                 }
3096
3097                 $previewhead = "<div class='previewnote'>\n" .
3098                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
3099                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3100
3101                 $pageLang = $this->mTitle->getPageLanguage();
3102                 $attribs = array( 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
3103                         'class' => 'mw-content-' . $pageLang->getDir() );
3104                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3105
3106                 wfProfileOut( __METHOD__ );
3107                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3108         }
3109
3110         /**
3111          * @return Array
3112          */
3113         function getTemplates() {
3114                 if ( $this->preview || $this->section != '' ) {
3115                         $templates = array();
3116                         if ( !isset( $this->mParserOutput ) ) {
3117                                 return $templates;
3118                         }
3119                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3120                                 foreach ( array_keys( $template ) as $dbk ) {
3121                                         $templates[] = Title::makeTitle( $ns, $dbk );
3122                                 }
3123                         }
3124                         return $templates;
3125                 } else {
3126                         return $this->mTitle->getTemplateLinksFrom();
3127                 }
3128         }
3129
3130         /**
3131          * Shows a bulletin board style toolbar for common editing functions.
3132          * It can be disabled in the user preferences.
3133          * The necessary JavaScript code can be found in skins/common/edit.js.
3134          *
3135          * @return string
3136          */
3137         static function getEditToolbar() {
3138                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
3139                 global $wgUseTeX, $wgEnableUploads, $wgForeignFileRepos;
3140
3141                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3142
3143                 /**
3144                  * $toolarray is an array of arrays each of which includes the
3145                  * filename of the button image (without path), the opening
3146                  * tag, the closing tag, optionally a sample text that is
3147                  * inserted between the two when no selection is highlighted
3148                  * and.  The tip text is shown when the user moves the mouse
3149                  * over the button.
3150                  *
3151                  * Also here: accesskeys (key), which are not used yet until
3152                  * someone can figure out a way to make them work in
3153                  * IE. However, we should make sure these keys are not defined
3154                  * on the edit page.
3155                  */
3156                 $toolarray = array(
3157                         array(
3158                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
3159                                 'id'     => 'mw-editbutton-bold',
3160                                 'open'   => '\'\'\'',
3161                                 'close'  => '\'\'\'',
3162                                 'sample' => wfMessage( 'bold_sample' )->text(),
3163                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3164                                 'key'    => 'B'
3165                         ),
3166                         array(
3167                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
3168                                 'id'     => 'mw-editbutton-italic',
3169                                 'open'   => '\'\'',
3170                                 'close'  => '\'\'',
3171                                 'sample' => wfMessage( 'italic_sample' )->text(),
3172                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3173                                 'key'    => 'I'
3174                         ),
3175                         array(
3176                                 'image'  => $wgLang->getImageFile( 'button-link' ),
3177                                 'id'     => 'mw-editbutton-link',
3178                                 'open'   => '[[',
3179                                 'close'  => ']]',
3180                                 'sample' => wfMessage( 'link_sample' )->text(),
3181                                 'tip'    => wfMessage( 'link_tip' )->text(),
3182                                 'key'    => 'L'
3183                         ),
3184                         array(
3185                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
3186                                 'id'     => 'mw-editbutton-extlink',
3187                                 'open'   => '[',
3188                                 'close'  => ']',
3189                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3190                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3191                                 'key'    => 'X'
3192                         ),
3193                         array(
3194                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
3195                                 'id'     => 'mw-editbutton-headline',
3196                                 'open'   => "\n== ",
3197                                 'close'  => " ==\n",
3198                                 'sample' => wfMessage( 'headline_sample' )->text(),
3199                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3200                                 'key'    => 'H'
3201                         ),
3202                         $imagesAvailable ? array(
3203                                 'image'  => $wgLang->getImageFile( 'button-image' ),
3204                                 'id'     => 'mw-editbutton-image',
3205                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3206                                 'close'  => ']]',
3207                                 'sample' => wfMessage( 'image_sample' )->text(),
3208                                 'tip'    => wfMessage( 'image_tip' )->text(),
3209                                 'key'    => 'D',
3210                         ) : false,
3211                         $imagesAvailable ? array(
3212                                 'image'  => $wgLang->getImageFile( 'button-media' ),
3213                                 'id'     => 'mw-editbutton-media',
3214                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3215                                 'close'  => ']]',
3216                                 'sample' => wfMessage( 'media_sample' )->text(),
3217                                 'tip'    => wfMessage( 'media_tip' )->text(),
3218                                 'key'    => 'M'
3219                         ) : false,
3220                         $wgUseTeX ? array(
3221                                 'image'  => $wgLang->getImageFile( 'button-math' ),
3222                                 'id'     => 'mw-editbutton-math',
3223                                 'open'   => "<math>",
3224                                 'close'  => "</math>",
3225                                 'sample' => wfMessage( 'math_sample' )->text(),
3226                                 'tip'    => wfMessage( 'math_tip' )->text(),
3227                                 'key'    => 'C'
3228                         ) : false,
3229                         array(
3230                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
3231                                 'id'     => 'mw-editbutton-nowiki',
3232                                 'open'   => "<nowiki>",
3233                                 'close'  => "</nowiki>",
3234                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3235                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3236                                 'key'    => 'N'
3237                         ),
3238                         array(
3239                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
3240                                 'id'     => 'mw-editbutton-signature',
3241                                 'open'   => '--~~~~',
3242                                 'close'  => '',
3243                                 'sample' => '',
3244                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3245                                 'key'    => 'Y'
3246                         ),
3247                         array(
3248                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
3249                                 'id'     => 'mw-editbutton-hr',
3250                                 'open'   => "\n----\n",
3251                                 'close'  => '',
3252                                 'sample' => '',
3253                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3254                                 'key'    => 'R'
3255                         )
3256                 );
3257
3258                 $script = 'mw.loader.using("mediawiki.action.edit", function() {';
3259                 foreach ( $toolarray as $tool ) {
3260                         if ( !$tool ) {
3261                                 continue;
3262                         }
3263
3264                         $params = array(
3265                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
3266                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3267                                 // Older browsers show a "speedtip" type message only for ALT.
3268                                 // Ideally these should be different, realistically they
3269                                 // probably don't need to be.
3270                                 $tip = $tool['tip'],
3271                                 $open = $tool['open'],
3272                                 $close = $tool['close'],
3273                                 $sample = $tool['sample'],
3274                                 $cssId = $tool['id'],
3275                         );
3276
3277                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
3278                 }
3279
3280                 // This used to be called on DOMReady from mediawiki.action.edit, which
3281                 // ended up causing race conditions with the setup code above.
3282                 $script .= "\n" .
3283                         "// Create button bar\n" .
3284                         "$(function() { mw.toolbar.init(); } );\n";
3285
3286                 $script .= '});';
3287                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3288
3289                 $toolbar = '<div id="toolbar"></div>';
3290
3291                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3292
3293                 return $toolbar;
3294         }
3295
3296         /**
3297          * Returns an array of html code of the following checkboxes:
3298          * minor and watch
3299          *
3300          * @param $tabindex int Current tabindex
3301          * @param $checked Array of checkbox => bool, where bool indicates the checked
3302          *                 status of the checkbox
3303          *
3304          * @return array
3305          */
3306         public function getCheckboxes( &$tabindex, $checked ) {
3307                 global $wgUser;
3308
3309                 $checkboxes = array();
3310
3311                 // don't show the minor edit checkbox if it's a new page or section
3312                 if ( !$this->isNew ) {
3313                         $checkboxes['minor'] = '';
3314                         $minorLabel = wfMessage( 'minoredit' )->parse();
3315                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3316                                 $attribs = array(
3317                                         'tabindex'  => ++$tabindex,
3318                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3319                                         'id'        => 'wpMinoredit',
3320                                 );
3321                                 $checkboxes['minor'] =
3322                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3323                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3324                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3325                                         ">{$minorLabel}</label>";
3326                         }
3327                 }
3328
3329                 $watchLabel = wfMessage( 'watchthis' )->parse();
3330                 $checkboxes['watch'] = '';
3331                 if ( $wgUser->isLoggedIn() ) {
3332                         $attribs = array(
3333                                 'tabindex'  => ++$tabindex,
3334                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3335                                 'id'        => 'wpWatchthis',
3336                         );
3337                         $checkboxes['watch'] =
3338                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3339                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3340                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3341                                 ">{$watchLabel}</label>";
3342                 }
3343                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3344                 return $checkboxes;
3345         }
3346
3347         /**
3348          * Returns an array of html code of the following buttons:
3349          * save, diff, preview and live
3350          *
3351          * @param $tabindex int Current tabindex
3352          *
3353          * @return array
3354          */
3355         public function getEditButtons( &$tabindex ) {
3356                 $buttons = array();
3357
3358                 $temp = array(
3359                         'id'        => 'wpSave',
3360                         'name'      => 'wpSave',
3361                         'type'      => 'submit',
3362                         'tabindex'  => ++$tabindex,
3363                         'value'     => wfMessage( 'savearticle' )->text(),
3364                         'accesskey' => wfMessage( 'accesskey-save' )->text(),
3365                         'title'     => wfMessage( 'tooltip-save' )->text() . ' [' . wfMessage( 'accesskey-save' )->text() . ']',
3366                 );
3367                 $buttons['save'] = Xml::element( 'input', $temp, '' );
3368
3369                 ++$tabindex; // use the same for preview and live preview
3370                 $temp = array(
3371                         'id'        => 'wpPreview',
3372                         'name'      => 'wpPreview',
3373                         'type'      => 'submit',
3374                         'tabindex'  => $tabindex,
3375                         'value'     => wfMessage( 'showpreview' )->text(),
3376                         'accesskey' => wfMessage( 'accesskey-preview' )->text(),
3377                         'title'     => wfMessage( 'tooltip-preview' )->text() . ' [' . wfMessage( 'accesskey-preview' )->text() . ']',
3378                 );
3379                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
3380                 $buttons['live'] = '';
3381
3382                 $temp = array(
3383                         'id'        => 'wpDiff',
3384                         'name'      => 'wpDiff',
3385                         'type'      => 'submit',
3386                         'tabindex'  => ++$tabindex,
3387                         'value'     => wfMessage( 'showdiff' )->text(),
3388                         'accesskey' => wfMessage( 'accesskey-diff' )->text(),
3389                         'title'     => wfMessage( 'tooltip-diff' )->text() . ' [' . wfMessage( 'accesskey-diff' )->text() . ']',
3390                 );
3391                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
3392
3393                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3394                 return $buttons;
3395         }
3396
3397         /**
3398          * Output preview text only. This can be sucked into the edit page
3399          * via JavaScript, and saves the server time rendering the skin as
3400          * well as theoretically being more robust on the client (doesn't
3401          * disturb the edit box's undo history, won't eat your text on
3402          * failure, etc).
3403          *
3404          * @todo This doesn't include category or interlanguage links.
3405          *       Would need to enhance it a bit, "<s>maybe wrap them in XML
3406          *       or something...</s>" that might also require more skin
3407          *       initialization, so check whether that's a problem.
3408          */
3409         function livePreview() {
3410                 global $wgOut;
3411                 $wgOut->disable();
3412                 header( 'Content-type: text/xml; charset=utf-8' );
3413                 header( 'Cache-control: no-cache' );
3414
3415                 $previewText = $this->getPreviewText();
3416                 #$categories = $skin->getCategoryLinks();
3417
3418                 $s =
3419                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3420                 Xml::tags( 'livepreview', null,
3421                         Xml::element( 'preview', null, $previewText )
3422                         #.      Xml::element( 'category', null, $categories )
3423                 );
3424                 echo $s;
3425         }
3426
3427         /**
3428          * Call the stock "user is blocked" page
3429          *
3430          * @deprecated in 1.19; throw an exception directly instead
3431          */
3432         function blockedPage() {
3433                 wfDeprecated( __METHOD__, '1.19' );
3434                 global $wgUser;
3435
3436                 throw new UserBlockedError( $wgUser->getBlock() );
3437         }
3438
3439         /**
3440          * Produce the stock "please login to edit pages" page
3441          *
3442          * @deprecated in 1.19; throw an exception directly instead
3443          */
3444         function userNotLoggedInPage() {
3445                 wfDeprecated( __METHOD__, '1.19' );
3446                 throw new PermissionsError( 'edit' );
3447         }
3448
3449         /**
3450          * Show an error page saying to the user that he has insufficient permissions
3451          * to create a new page
3452          *
3453          * @deprecated in 1.19; throw an exception directly instead
3454          */
3455         function noCreatePermission() {
3456                 wfDeprecated( __METHOD__, '1.19' );
3457                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
3458                 throw new PermissionsError( $permission );
3459         }
3460
3461         /**
3462          * Creates a basic error page which informs the user that
3463          * they have attempted to edit a nonexistent section.
3464          */
3465         function noSuchSectionPage() {
3466                 global $wgOut;
3467
3468                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3469
3470                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
3471                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
3472                 $wgOut->addHTML( $res );
3473
3474                 $wgOut->returnToMain( false, $this->mTitle );
3475         }
3476
3477         /**
3478          * Produce the stock "your edit contains spam" page
3479          *
3480          * @param $match string|bool Text which triggered one or more filters
3481          * @deprecated since 1.17 Use method spamPageWithContent() instead
3482          */
3483         static function spamPage( $match = false ) {
3484                 wfDeprecated( __METHOD__, '1.17' );
3485
3486                 global $wgOut, $wgTitle;
3487
3488                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3489
3490                 $wgOut->addHTML( '<div id="spamprotected">' );
3491                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3492                 if ( $match ) {
3493                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3494                 }
3495                 $wgOut->addHTML( '</div>' );
3496
3497                 $wgOut->returnToMain( false, $wgTitle );
3498         }
3499
3500         /**
3501          * Show "your edit contains spam" page with your diff and text
3502          *
3503          * @param $match string|Array|bool Text (or array of texts) which triggered one or more filters
3504          */
3505         public function spamPageWithContent( $match = false ) {
3506                 global $wgOut, $wgLang;
3507                 $this->textbox2 = $this->textbox1;
3508
3509                 if( is_array( $match ) ) {
3510                         $match = $wgLang->listToText( $match );
3511                 }
3512                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3513
3514                 $wgOut->addHTML( '<div id="spamprotected">' );
3515                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3516                 if ( $match ) {
3517                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3518                 }
3519                 $wgOut->addHTML( '</div>' );
3520
3521                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3522                 $this->showDiff();
3523
3524                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3525                 $this->showTextbox2();
3526
3527                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3528         }
3529
3530         /**
3531          * Format an anchor fragment as it would appear for a given section name
3532          * @param $text String
3533          * @return String
3534          * @private
3535          */
3536         function sectionAnchor( $text ) {
3537                 global $wgParser;
3538                 return $wgParser->guessSectionNameFromWikiText( $text );
3539         }
3540
3541         /**
3542          * Check if the browser is on a blacklist of user-agents known to
3543          * mangle UTF-8 data on form submission. Returns true if Unicode
3544          * should make it through, false if it's known to be a problem.
3545          * @return bool
3546          * @private
3547          */
3548         function checkUnicodeCompliantBrowser() {
3549                 global $wgBrowserBlackList, $wgRequest;
3550
3551                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
3552                 if ( $currentbrowser === false ) {
3553                         // No User-Agent header sent? Trust it by default...
3554                         return true;
3555                 }
3556
3557                 foreach ( $wgBrowserBlackList as $browser ) {
3558                         if ( preg_match( $browser, $currentbrowser ) ) {
3559                                 return false;
3560                         }
3561                 }
3562                 return true;
3563         }
3564
3565         /**
3566          * Filter an input field through a Unicode de-armoring process if it
3567          * came from an old browser with known broken Unicode editing issues.
3568          *
3569          * @param $request WebRequest
3570          * @param $field String
3571          * @return String
3572          * @private
3573          */
3574         function safeUnicodeInput( $request, $field ) {
3575                 $text = rtrim( $request->getText( $field ) );
3576                 return $request->getBool( 'safemode' )
3577                         ? $this->unmakesafe( $text )
3578                         : $text;
3579         }
3580
3581         /**
3582          * @param $request WebRequest
3583          * @param $text string
3584          * @return string
3585          */
3586         function safeUnicodeText( $request, $text ) {
3587                 $text = rtrim( $text );
3588                 return $request->getBool( 'safemode' )
3589                         ? $this->unmakesafe( $text )
3590                         : $text;
3591         }
3592
3593         /**
3594          * Filter an output field through a Unicode armoring process if it is
3595          * going to an old browser with known broken Unicode editing issues.
3596          *
3597          * @param $text String
3598          * @return String
3599          * @private
3600          */
3601         function safeUnicodeOutput( $text ) {
3602                 global $wgContLang;
3603                 $codedText = $wgContLang->recodeForEdit( $text );
3604                 return $this->checkUnicodeCompliantBrowser()
3605                         ? $codedText
3606                         : $this->makesafe( $codedText );
3607         }
3608
3609         /**
3610          * A number of web browsers are known to corrupt non-ASCII characters
3611          * in a UTF-8 text editing environment. To protect against this,
3612          * detected browsers will be served an armored version of the text,
3613          * with non-ASCII chars converted to numeric HTML character references.
3614          *
3615          * Preexisting such character references will have a 0 added to them
3616          * to ensure that round-trips do not alter the original data.
3617          *
3618          * @param $invalue String
3619          * @return String
3620          * @private
3621          */
3622         function makesafe( $invalue ) {
3623                 // Armor existing references for reversability.
3624                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
3625
3626                 $bytesleft = 0;
3627                 $result = "";
3628                 $working = 0;
3629                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3630                         $bytevalue = ord( $invalue[$i] );
3631                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
3632                                 $result .= chr( $bytevalue );
3633                                 $bytesleft = 0;
3634                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
3635                                 $working = $working << 6;
3636                                 $working += ( $bytevalue & 0x3F );
3637                                 $bytesleft--;
3638                                 if ( $bytesleft <= 0 ) {
3639                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3640                                 }
3641                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
3642                                 $working = $bytevalue & 0x1F;
3643                                 $bytesleft = 1;
3644                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
3645                                 $working = $bytevalue & 0x0F;
3646                                 $bytesleft = 2;
3647                         } else { // 1111 0xxx
3648                                 $working = $bytevalue & 0x07;
3649                                 $bytesleft = 3;
3650                         }
3651                 }
3652                 return $result;
3653         }
3654
3655         /**
3656          * Reverse the previously applied transliteration of non-ASCII characters
3657          * back to UTF-8. Used to protect data from corruption by broken web browsers
3658          * as listed in $wgBrowserBlackList.
3659          *
3660          * @param $invalue String
3661          * @return String
3662          * @private
3663          */
3664         function unmakesafe( $invalue ) {
3665                 $result = "";
3666                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3667                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
3668                                 $i += 3;
3669                                 $hexstring = "";
3670                                 do {
3671                                         $hexstring .= $invalue[$i];
3672                                         $i++;
3673                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
3674
3675                                 // Do some sanity checks. These aren't needed for reversability,
3676                                 // but should help keep the breakage down if the editor
3677                                 // breaks one of the entities whilst editing.
3678                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) and ( strlen( $hexstring ) <= 6 ) ) {
3679                                         $codepoint = hexdec( $hexstring );
3680                                         $result .= codepointToUtf8( $codepoint );
3681                                 } else {
3682                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
3683                                 }
3684                         } else {
3685                                 $result .= substr( $invalue, $i, 1 );
3686                         }
3687                 }
3688                 // reverse the transform that we made for reversability reasons.
3689                 return strtr( $result, array( "&#x0" => "&#x" ) );
3690         }
3691 }