Merge "Improve "selfmove" message's wording"
[lhc/web/wiklou.git] / includes / EditPage.php
index 12966e5..aa1f205 100644 (file)
@@ -40,6 +40,11 @@ use Wikimedia\ScopedCallback;
  * headaches, which may be fatal.
  */
 class EditPage {
+       /**
+        * Used for Unicode support checks
+        */
+       const UNICODE_CHECK = 'ℳ𝒲β™₯π“Šπ“ƒπ’Ύπ’Έβ„΄π’Ήβ„―';
+
        /**
         * Status: Article successfully updated
         */
@@ -177,6 +182,11 @@ class EditPage {
         */
        const AS_CANNOT_USE_CUSTOM_MODEL = 241;
 
+       /**
+        * Status: edit rejected because browser doesn't support Unicode.
+        */
+       const AS_UNICODE_NOT_SUPPORTED = 242;
+
        /**
         * HTML id and name for the beginning of the edit form.
         */
@@ -203,12 +213,18 @@ class EditPage {
         */
        const POST_EDIT_COOKIE_DURATION = 1200;
 
-       /** @var Article */
+       /**
+        * @deprecated for public usage since 1.30 use EditPage::getArticle()
+        * @var Article
+        */
        public $mArticle;
        /** @var WikiPage */
        private $page;
 
-       /** @var Title */
+       /**
+        * @deprecated for public usage since 1.30 use EditPage::getTitle()
+        * @var Title
+        */
        public $mTitle;
 
        /** @var null|Title */
@@ -220,16 +236,28 @@ class EditPage {
        /** @var bool */
        public $isConflict = false;
 
-       /** @var bool */
+       /**
+        * @deprecated since 1.30 use Title::isCssJsSubpage()
+        * @var bool
+        */
        public $isCssJsSubpage = false;
 
-       /** @var bool */
+       /**
+        * @deprecated since 1.30 use Title::isCssSubpage()
+        * @var bool
+        */
        public $isCssSubpage = false;
 
-       /** @var bool */
+       /**
+        * @deprecated since 1.30 use Title::isJsSubpage()
+        * @var bool
+        */
        public $isJsSubpage = false;
 
-       /** @var bool */
+       /**
+        * @deprecated since 1.30
+        * @var bool
+        */
        public $isWrongCaseCssJsPage = false;
 
        /** @var bool New page or new section */
@@ -413,6 +441,11 @@ class EditPage {
         */
        private $isOldRev = false;
 
+       /**
+        * @var string|null What the user submitted in the 'wpUnicodeCheck' field
+        */
+       private $unicodeCheck;
+
        /**
         * @param Article $article
         */
@@ -469,6 +502,10 @@ class EditPage {
         */
        public function getContextTitle() {
                if ( is_null( $this->mContextTitle ) ) {
+                       wfDebugLog(
+                               'GlobalTitleFail',
+                               __METHOD__ . ' called by ' . wfGetAllCallers( 5 ) . ' with no title set.'
+                       );
                        global $wgTitle;
                        return $wgTitle;
                } else {
@@ -527,7 +564,6 @@ class EditPage {
         * the newly-edited page.
         */
        public function edit() {
-               global $wgRequest;
                // Allow extensions to modify/prevent this form or submission
                if ( !Hooks::run( 'AlternateEdit', [ $this ] ) ) {
                        return;
@@ -535,13 +571,14 @@ class EditPage {
 
                wfDebug( __METHOD__ . ": enter\n" );
 
+               $request = $this->context->getRequest();
                // If they used redlink=1 and the page exists, redirect to the main article
-               if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
+               if ( $request->getBool( 'redlink' ) && $this->mTitle->exists() ) {
                        $this->context->getOutput()->redirect( $this->mTitle->getFullURL() );
                        return;
                }
 
-               $this->importFormData( $wgRequest );
+               $this->importFormData( $request );
                $this->firsttime = false;
 
                if ( wfReadOnly() && $this->save ) {
@@ -608,10 +645,11 @@ class EditPage {
 
                $this->isConflict = false;
                // css / js subpages of user pages get a special treatment
+               // The following member variables are deprecated since 1.30,
+               // the functions should be used instead.
                $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
                $this->isCssSubpage = $this->mTitle->isCssSubpage();
                $this->isJsSubpage = $this->mTitle->isJsSubpage();
-               // @todo FIXME: Silly assignment.
                $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 
                # Show applicable editing introductions
@@ -700,10 +738,8 @@ class EditPage {
         * @throws PermissionsError
         */
        protected function displayPermissionsError( array $permErrors ) {
-               global $wgRequest;
-
                $out = $this->context->getOutput();
-               if ( $wgRequest->getBool( 'redlink' ) ) {
+               if ( $this->context->getRequest()->getBool( 'redlink' ) ) {
                        // The edit page was reached via a red link.
                        // Redirect to the article page and let them click the edit tab if
                        // they really want a permission error.
@@ -785,24 +821,25 @@ class EditPage {
         * @return bool
         */
        protected function previewOnOpen() {
-               global $wgRequest, $wgPreviewOnOpenNamespaces;
-               if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
+               $previewOnOpenNamespaces = $this->context->getConfig()->get( 'PreviewOnOpenNamespaces' );
+               $request = $this->context->getRequest();
+               if ( $request->getVal( 'preview' ) == 'yes' ) {
                        // Explicit override from request
                        return true;
-               } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
+               } elseif ( $request->getVal( 'preview' ) == 'no' ) {
                        // Explicit override from request
                        return false;
                } elseif ( $this->section == 'new' ) {
                        // Nothing *to* preview for new sections
                        return false;
-               } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() )
+               } elseif ( ( $request->getVal( 'preload' ) !== null || $this->mTitle->exists() )
                        && $this->context->getUser()->getOption( 'previewonfirst' )
                ) {
                        // Standard preference behavior
                        return true;
                } elseif ( !$this->mTitle->exists()
-                       && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
-                       && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
+                       && isset( $previewOnOpenNamespaces[$this->mTitle->getNamespace()] )
+                       && $previewOnOpenNamespaces[$this->mTitle->getNamespace()]
                ) {
                        // Categories are special
                        return true;
@@ -862,7 +899,7 @@ class EditPage {
                        # These fields need to be checked for encoding.
                        # Also remove trailing whitespace, but don't remove _initial_
                        # whitespace from the text boxes. This may be significant formatting.
-                       $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
+                       $this->textbox1 = rtrim( $request->getText( 'wpTextbox1' ) );
                        if ( !$request->getCheck( 'wpTextbox2' ) ) {
                                // Skip this if wpTextbox2 has input, it indicates that we came
                                // from a conflict page with raw page text, not a custom form
@@ -873,6 +910,8 @@ class EditPage {
                                }
                        }
 
+                       $this->unicodeCheck = $request->getText( 'wpUnicodeCheck' );
+
                        $this->summary = $request->getText( 'wpSummary' );
 
                        # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
@@ -1120,11 +1159,12 @@ class EditPage {
         * @since 1.21
         */
        protected function getContentObject( $def_content = null ) {
-               global $wgRequest, $wgContLang;
+               global $wgContLang;
 
                $content = false;
 
                $user = $this->context->getUser();
+               $request = $this->context->getRequest();
                // For message page not locally set, use the i18n message.
                // For other non-existent articles, use preload text if any.
                if ( !$this->mTitle->exists() || $this->section == 'new' ) {
@@ -1136,10 +1176,10 @@ class EditPage {
                        }
                        if ( $content === false ) {
                                # If requested, preload some text.
-                               $preload = $wgRequest->getVal( 'preload',
+                               $preload = $request->getVal( 'preload',
                                        // Custom preload text for new sections
                                        $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
-                               $params = $wgRequest->getArray( 'preloadparams', [] );
+                               $params = $request->getArray( 'preloadparams', [] );
 
                                $content = $this->getPreloadedContent( $preload, $params );
                        }
@@ -1154,8 +1194,8 @@ class EditPage {
                                        $content = $def_content;
                                }
                        } else {
-                               $undoafter = $wgRequest->getInt( 'undoafter' );
-                               $undo = $wgRequest->getInt( 'undo' );
+                               $undoafter = $request->getInt( 'undoafter' );
+                               $undo = $request->getInt( 'undo' );
 
                                if ( $undo > 0 && $undoafter > 0 ) {
                                        $undorev = Revision::newFromId( $undo );
@@ -1482,9 +1522,7 @@ class EditPage {
         * Log when a page was successfully saved after the edit conflict view
         */
        private function incrementResolvedConflicts() {
-               global $wgRequest;
-
-               if ( $wgRequest->getText( 'mode' ) !== 'conflict' ) {
+               if ( $this->context->getRequest()->getText( 'mode' ) !== 'conflict' ) {
                        return;
                }
 
@@ -1542,6 +1580,7 @@ class EditPage {
 
                        case self::AS_CANNOT_USE_CUSTOM_MODEL:
                        case self::AS_PARSE_ERROR:
+                       case self::AS_UNICODE_NOT_SUPPORTED:
                                $out->addWikiText( '<div class="error">' . "\n" . $status->getWikiText() . '</div>' );
                                return true;
 
@@ -1645,7 +1684,7 @@ class EditPage {
 
                // Run new style post-section-merge edit filter
                if ( !Hooks::run( 'EditFilterMergedContent',
-                               [ $this->mArticle->getContext(), $content, $status, $this->summary,
+                               [ $this->context, $content, $status, $this->summary,
                                $user, $this->minoredit ] )
                ) {
                        # Error messages etc. could be handled within the hook...
@@ -1730,9 +1769,6 @@ class EditPage {
         * time.
         */
        public function internalAttemptSave( &$result, $bot = false ) {
-               global $wgRequest, $wgMaxArticleSize;
-               global $wgContentHandlerUseDB;
-
                $status = Status::newGood();
                $user = $this->context->getUser();
 
@@ -1743,7 +1779,14 @@ class EditPage {
                        return $status;
                }
 
-               $spam = $wgRequest->getText( 'wpAntispam' );
+               if ( $this->unicodeCheck !== self::UNICODE_CHECK ) {
+                       $status->fatal( 'unicode-support-fail' );
+                       $status->value = self::AS_UNICODE_NOT_SUPPORTED;
+                       return $status;
+               }
+
+               $request = $this->context->getRequest();
+               $spam = $request->getText( 'wpAntispam' );
                if ( $spam !== '' ) {
                        wfDebugLog(
                                'SimpleAntiSpam',
@@ -1803,7 +1846,7 @@ class EditPage {
                }
                if ( $match !== false ) {
                        $result['spam'] = $match;
-                       $ip = $wgRequest->getIP();
+                       $ip = $request->getIP();
                        $pdbk = $this->mTitle->getPrefixedDBkey();
                        $match = str_replace( "\n", '', $match );
                        wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
@@ -1837,7 +1880,9 @@ class EditPage {
                }
 
                $this->contentLength = strlen( $this->textbox1 );
-               if ( $this->contentLength > $wgMaxArticleSize * 1024 ) {
+               $config = $this->context->getConfig();
+               $maxArticleSize = $config->get( 'MaxArticleSize' );
+               if ( $this->contentLength > $maxArticleSize * 1024 ) {
                        // Error will be displayed by showEditForm()
                        $this->tooBig = true;
                        $status->setResult( false, self::AS_CONTENT_TOO_BIG );
@@ -1857,7 +1902,7 @@ class EditPage {
 
                $changingContentModel = false;
                if ( $this->contentModel !== $this->mTitle->getContentModel() ) {
-                       if ( !$wgContentHandlerUseDB ) {
+                       if ( !$config->get( 'ContentHandlerUseDB' ) ) {
                                $status->fatal( 'editpage-cannot-use-custom-model' );
                                $status->value = self::AS_CANNOT_USE_CUSTOM_MODEL;
                                return $status;
@@ -2136,7 +2181,7 @@ class EditPage {
 
                // Check for length errors again now that the section is merged in
                $this->contentLength = strlen( $this->toEditText( $content ) );
-               if ( $this->contentLength > $wgMaxArticleSize * 1024 ) {
+               if ( $this->contentLength > $maxArticleSize * 1024 ) {
                        $this->tooBig = true;
                        $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
                        return $status;
@@ -2337,8 +2382,6 @@ class EditPage {
        }
 
        public function setHeaders() {
-               global $wgAjaxEditStash;
-
                $out = $this->context->getOutput();
 
                $out->addModules( 'mediawiki.action.edit' );
@@ -2390,7 +2433,7 @@ class EditPage {
                # Keep Resources.php/mediawiki.action.edit.preview in sync with the possible keys
                $out->addJsConfigVars( [
                        'wgEditMessage' => $msg,
-                       'wgAjaxEditStash' => $wgAjaxEditStash,
+                       'wgAjaxEditStash' => $this->context->getConfig()->get( 'AjaxEditStash' ),
                ] );
        }
 
@@ -2670,6 +2713,9 @@ class EditPage {
                        call_user_func_array( $formCallback, [ &$out ] );
                }
 
+               // Add a check for Unicode support
+               $out->addHTML( Html::hidden( 'wpUnicodeCheck', self::UNICODE_CHECK ) );
+
                // Add an empty field to trip up spambots
                $out->addHTML(
                        Xml::openElement( 'div', [ 'id' => 'antispam-container', 'style' => 'display: none;' ] )
@@ -2765,7 +2811,7 @@ class EditPage {
 
                $out->addHTML( $this->editFormTextBeforeContent );
 
-               if ( !$this->isCssJsSubpage && $showToolbar && $user->getOption( 'showtoolbar' ) ) {
+               if ( !$this->mTitle->isCssJsSubpage() && $showToolbar && $user->getOption( 'showtoolbar' ) ) {
                        $out->addHTML( self::getEditToolbar( $this->mTitle ) );
                }
 
@@ -2889,8 +2935,6 @@ class EditPage {
        }
 
        protected function showHeader() {
-               global $wgAllowUserCss, $wgAllowUserJs;
-
                $out = $this->context->getOutput();
                $user = $this->context->getUser();
                if ( $this->isConflict ) {
@@ -2944,10 +2988,6 @@ class EditPage {
                                $out->addWikiText( $this->hookError );
                        }
 
-                       if ( !$this->checkUnicodeCompliantBrowser() ) {
-                               $out->addWikiMsg( 'nonunicodebrowser' );
-                       }
-
                        if ( $this->section != 'new' ) {
                                $revision = $this->mArticle->getRevisionFetched();
                                if ( $revision ) {
@@ -3005,27 +3045,29 @@ class EditPage {
                                );
                        }
                } else {
-                       if ( $this->isCssJsSubpage ) {
+                       if ( $this->mTitle->isCssJsSubpage() ) {
                                # Check the skin exists
-                               if ( $this->isWrongCaseCssJsPage ) {
+                               if ( $this->isWrongCaseCssJsPage() ) {
                                        $out->wrapWikiMsg(
                                                "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
                                                [ 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ]
                                        );
                                }
                                if ( $this->getTitle()->isSubpageOf( $user->getUserPage() ) ) {
+                                       $isCssSubpage = $this->mTitle->isCssSubpage();
                                        $out->wrapWikiMsg( '<div class="mw-usercssjspublic">$1</div>',
-                                               $this->isCssSubpage ? 'usercssispublic' : 'userjsispublic'
+                                               $isCssSubpage ? 'usercssispublic' : 'userjsispublic'
                                        );
                                        if ( $this->formtype !== 'preview' ) {
-                                               if ( $this->isCssSubpage && $wgAllowUserCss ) {
+                                               $config = $this->context->getConfig();
+                                               if ( $isCssSubpage && $config->get( 'AllowUserCss' ) ) {
                                                        $out->wrapWikiMsg(
                                                                "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
                                                                [ 'usercssyoucanpreview' ]
                                                        );
                                                }
 
-                                               if ( $this->isJsSubpage && $wgAllowUserJs ) {
+                                               if ( $this->mTitle->isJsSubpage() && $config->get( 'AllowUserJs' ) ) {
                                                        $out->wrapWikiMsg(
                                                                "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
                                                                [ 'userjsyoucanpreview' ]
@@ -3218,10 +3260,6 @@ class EditPage {
                $out->addHTML( Html::hidden( 'wpEdittime', $this->edittime ) );
                $out->addHTML( Html::hidden( 'editRevId', $this->editRevId ) );
                $out->addHTML( Html::hidden( 'wpScrolltop', $this->scrolltop, [ 'id' => 'wpScrolltop' ] ) );
-
-               if ( !$this->checkUnicodeCompliantBrowser() ) {
-                       $out->addHTML( Html::hidden( 'safemode', '1' ) );
-               }
        }
 
        protected function showFormAfterText() {
@@ -3315,8 +3353,7 @@ class EditPage {
        }
 
        protected function showTextbox( $text, $name, $customAttribs = [] ) {
-               $wikitext = $this->safeUnicodeOutput( $text );
-               $wikitext = $this->addNewLineAtEnd( $wikitext );
+               $wikitext = $this->addNewLineAtEnd( $text );
 
                $attribs = $this->buildTextboxAttribs( $name, $customAttribs, $this->context->getUser() );
 
@@ -3440,7 +3477,7 @@ class EditPage {
                                $newContent = $oldContent->getContentHandler()->makeEmptyContent();
                        }
 
-                       $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
+                       $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->context );
                        $de->setContent( $oldContent, $newContent );
 
                        $difftext = $de->getDiff( $oldtitle, $newtitle );
@@ -3648,7 +3685,7 @@ class EditPage {
                        $content2 = $this->toEditContent( $this->textbox2 );
 
                        $handler = ContentHandler::getForModelID( $this->contentModel );
-                       $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
+                       $de = $handler->createDifferenceEngine( $this->context );
                        $de->setContent( $content2, $content1 );
                        $de->showDiff(
                                $this->context->msg( 'yourtext' )->parse(),
@@ -3785,12 +3822,10 @@ class EditPage {
         * @return string
         */
        public function getPreviewText() {
-               global $wgRawHtml;
-               global $wgAllowUserCss, $wgAllowUserJs;
-
                $out = $this->context->getOutput();
+               $config = $this->context->getConfig();
 
-               if ( $wgRawHtml && !$this->mTokenOk ) {
+               if ( $config->get( 'RawHtml' ) && !$this->mTokenOk ) {
                        // Could be an offsite preview attempt. This is very unsafe if
                        // HTML is enabled, as it could be an attack.
                        $parsedNote = '';
@@ -3853,12 +3888,12 @@ class EditPage {
 
                                if ( $content->getModel() == CONTENT_MODEL_CSS ) {
                                        $format = 'css';
-                                       if ( $level === 'user' && !$wgAllowUserCss ) {
+                                       if ( $level === 'user' && !$config->get( 'AllowUserCss' ) ) {
                                                $format = false;
                                        }
                                } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
                                        $format = 'js';
-                                       if ( $level === 'user' && !$wgAllowUserJs ) {
+                                       if ( $level === 'user' && !$config->get( 'AllowUserJs' ) ) {
                                                $format = false;
                                        }
                                } else {
@@ -3933,7 +3968,7 @@ class EditPage {
         * @return ParserOptions
         */
        protected function getPreviewParserOptions() {
-               $parserOptions = $this->page->makeParserOptions( $this->mArticle->getContext() );
+               $parserOptions = $this->page->makeParserOptions( $this->context );
                $parserOptions->setIsPreview( true );
                $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
                $parserOptions->enableLimitReport();
@@ -4185,8 +4220,6 @@ class EditPage {
         * @return array
         */
        public function getCheckboxes( &$tabindex, $checked ) {
-               global $wgUseMediaWikiUIEverywhere;
-
                $checkboxes = [];
                $checkboxesDef = $this->getCheckboxesDefinition( $checked );
 
@@ -4221,10 +4254,6 @@ class EditPage {
                                '&#160;' .
                                Xml::tags( 'label', $labelAttribs, $label );
 
-                       if ( $wgUseMediaWikiUIEverywhere ) {
-                               $checkboxHtml = Html::rawElement( 'div', [ 'class' => 'mw-ui-checkbox' ], $checkboxHtml );
-                       }
-
                        $checkboxes[ $legacyName ] = $checkboxHtml;
                }
 
@@ -4323,6 +4352,7 @@ class EditPage {
        /**
         * Get the message key of the label for the button to save the page
         *
+        * @since 1.30
         * @return string
         */
        protected function getSubmitButtonLabel() {
@@ -4464,138 +4494,31 @@ class EditPage {
                $out->addReturnTo( $this->getContextTitle(), [ 'action' => 'edit' ] );
        }
 
-       /**
-        * Check if the browser is on a blacklist of user-agents known to
-        * mangle UTF-8 data on form submission. Returns true if Unicode
-        * should make it through, false if it's known to be a problem.
-        * @return bool
-        */
-       private function checkUnicodeCompliantBrowser() {
-               global $wgBrowserBlackList, $wgRequest;
-
-               $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
-               if ( $currentbrowser === false ) {
-                       // No User-Agent header sent? Trust it by default...
-                       return true;
-               }
-
-               foreach ( $wgBrowserBlackList as $browser ) {
-                       if ( preg_match( $browser, $currentbrowser ) ) {
-                               return false;
-                       }
-               }
-               return true;
-       }
-
        /**
         * Filter an input field through a Unicode de-armoring process if it
         * came from an old browser with known broken Unicode editing issues.
         *
+        * @deprecated since 1.30, does nothing
+        *
         * @param WebRequest $request
         * @param string $field
         * @return string
         */
        protected function safeUnicodeInput( $request, $field ) {
-               $text = rtrim( $request->getText( $field ) );
-               return $request->getBool( 'safemode' )
-                       ? $this->unmakeSafe( $text )
-                       : $text;
+               return rtrim( $request->getText( $field ) );
        }
 
        /**
         * Filter an output field through a Unicode armoring process if it is
         * going to an old browser with known broken Unicode editing issues.
         *
+        * @deprecated since 1.30, does nothing
+        *
         * @param string $text
         * @return string
         */
        protected function safeUnicodeOutput( $text ) {
-               return $this->checkUnicodeCompliantBrowser()
-                       ? $text
-                       : $this->makeSafe( $text );
-       }
-
-       /**
-        * A number of web browsers are known to corrupt non-ASCII characters
-        * in a UTF-8 text editing environment. To protect against this,
-        * detected browsers will be served an armored version of the text,
-        * with non-ASCII chars converted to numeric HTML character references.
-        *
-        * Preexisting such character references will have a 0 added to them
-        * to ensure that round-trips do not alter the original data.
-        *
-        * @param string $invalue
-        * @return string
-        */
-       private function makeSafe( $invalue ) {
-               // Armor existing references for reversibility.
-               $invalue = strtr( $invalue, [ "&#x" => "&#x0" ] );
-
-               $bytesleft = 0;
-               $result = "";
-               $working = 0;
-               $valueLength = strlen( $invalue );
-               for ( $i = 0; $i < $valueLength; $i++ ) {
-                       $bytevalue = ord( $invalue[$i] );
-                       if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
-                               $result .= chr( $bytevalue );
-                               $bytesleft = 0;
-                       } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
-                               $working = $working << 6;
-                               $working += ( $bytevalue & 0x3F );
-                               $bytesleft--;
-                               if ( $bytesleft <= 0 ) {
-                                       $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
-                               }
-                       } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
-                               $working = $bytevalue & 0x1F;
-                               $bytesleft = 1;
-                       } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
-                               $working = $bytevalue & 0x0F;
-                               $bytesleft = 2;
-                       } else { // 1111 0xxx
-                               $working = $bytevalue & 0x07;
-                               $bytesleft = 3;
-                       }
-               }
-               return $result;
-       }
-
-       /**
-        * Reverse the previously applied transliteration of non-ASCII characters
-        * back to UTF-8. Used to protect data from corruption by broken web browsers
-        * as listed in $wgBrowserBlackList.
-        *
-        * @param string $invalue
-        * @return string
-        */
-       private function unmakeSafe( $invalue ) {
-               $result = "";
-               $valueLength = strlen( $invalue );
-               for ( $i = 0; $i < $valueLength; $i++ ) {
-                       if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
-                               $i += 3;
-                               $hexstring = "";
-                               do {
-                                       $hexstring .= $invalue[$i];
-                                       $i++;
-                               } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
-
-                               // Do some sanity checks. These aren't needed for reversibility,
-                               // but should help keep the breakage down if the editor
-                               // breaks one of the entities whilst editing.
-                               if ( ( substr( $invalue, $i, 1 ) == ";" ) && ( strlen( $hexstring ) <= 6 ) ) {
-                                       $codepoint = hexdec( $hexstring );
-                                       $result .= UtfNormal\Utils::codepointToUtf8( $codepoint );
-                               } else {
-                                       $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
-                               }
-                       } else {
-                               $result .= substr( $invalue, $i, 1 );
-                       }
-               }
-               // reverse the transform that we made for reversibility reasons.
-               return strtr( $result, [ "&#x0" => "&#x" ] );
+               return $text;
        }
 
        /**
@@ -4631,20 +4554,19 @@ class EditPage {
         * @since 1.29
         */
        protected function addLongPageWarningHeader() {
-               global $wgMaxArticleSize;
-
                if ( $this->contentLength === false ) {
                        $this->contentLength = strlen( $this->textbox1 );
                }
 
                $out = $this->context->getOutput();
                $lang = $this->context->getLanguage();
-               if ( $this->tooBig || $this->contentLength > $wgMaxArticleSize * 1024 ) {
+               $maxArticleSize = $this->context->getConfig()->get( 'MaxArticleSize' );
+               if ( $this->tooBig || $this->contentLength > $maxArticleSize * 1024 ) {
                        $out->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
                                [
                                        'longpageerror',
                                        $lang->formatNum( round( $this->contentLength / 1024, 3 ) ),
-                                       $lang->formatNum( $wgMaxArticleSize )
+                                       $lang->formatNum( $maxArticleSize )
                                ]
                        );
                } else {