includes/EditPage.php

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