includes/EditPage.php

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