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diff --git a/www/wiki/includes/EditPage.php b/www/wiki/includes/EditPage.php
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+<?php
+/**
+ * User interface for page editing.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+use MediaWiki\EditPage\TextboxBuilder;
+use MediaWiki\EditPage\TextConflictHelper;
+use MediaWiki\Logger\LoggerFactory;
+use MediaWiki\MediaWikiServices;
+use Wikimedia\ScopedCallback;
+
+/**
+ * The edit page/HTML interface (split from Article)
+ * The actual database and text munging is still in Article,
+ * but it should get easier to call those from alternate
+ * interfaces.
+ *
+ * EditPage cares about two distinct titles:
+ * $this->mContextTitle is the page that forms submit to, links point to,
+ * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
+ * page in the database that is actually being edited. These are
+ * usually the same, but they are now allowed to be different.
+ *
+ * Surgeon General's Warning: prolonged exposure to this class is known to cause
+ * headaches, which may be fatal.
+ */
+class EditPage {
+	/**
+	 * Used for Unicode support checks
+	 */
+	const UNICODE_CHECK = 'ℳ𝒲♥𝓊𝓃𝒾𝒸ℴ𝒹ℯ';
+
+	/**
+	 * Status: Article successfully updated
+	 */
+	const AS_SUCCESS_UPDATE = 200;
+
+	/**
+	 * Status: Article successfully created
+	 */
+	const AS_SUCCESS_NEW_ARTICLE = 201;
+
+	/**
+	 * Status: Article update aborted by a hook function
+	 */
+	const AS_HOOK_ERROR = 210;
+
+	/**
+	 * Status: A hook function returned an error
+	 */
+	const AS_HOOK_ERROR_EXPECTED = 212;
+
+	/**
+	 * Status: User is blocked from editing this page
+	 */
+	const AS_BLOCKED_PAGE_FOR_USER = 215;
+
+	/**
+	 * Status: Content too big (> $wgMaxArticleSize)
+	 */
+	const AS_CONTENT_TOO_BIG = 216;
+
+	/**
+	 * Status: this anonymous user is not allowed to edit this page
+	 */
+	const AS_READ_ONLY_PAGE_ANON = 218;
+
+	/**
+	 * Status: this logged in user is not allowed to edit this page
+	 */
+	const AS_READ_ONLY_PAGE_LOGGED = 219;
+
+	/**
+	 * Status: wiki is in readonly mode (wfReadOnly() == true)
+	 */
+	const AS_READ_ONLY_PAGE = 220;
+
+	/**
+	 * Status: rate limiter for action 'edit' was tripped
+	 */
+	const AS_RATE_LIMITED = 221;
+
+	/**
+	 * Status: article was deleted while editing and param wpRecreate == false or form
+	 * was not posted
+	 */
+	const AS_ARTICLE_WAS_DELETED = 222;
+
+	/**
+	 * Status: user tried to create this page, but is not allowed to do that
+	 * ( Title->userCan('create') == false )
+	 */
+	const AS_NO_CREATE_PERMISSION = 223;
+
+	/**
+	 * Status: user tried to create a blank page and wpIgnoreBlankArticle == false
+	 */
+	const AS_BLANK_ARTICLE = 224;
+
+	/**
+	 * Status: (non-resolvable) edit conflict
+	 */
+	const AS_CONFLICT_DETECTED = 225;
+
+	/**
+	 * Status: no edit summary given and the user has forceeditsummary set and the user is not
+	 * editing in his own userspace or talkspace and wpIgnoreBlankSummary == false
+	 */
+	const AS_SUMMARY_NEEDED = 226;
+
+	/**
+	 * Status: user tried to create a new section without content
+	 */
+	const AS_TEXTBOX_EMPTY = 228;
+
+	/**
+	 * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
+	 */
+	const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
+
+	/**
+	 * Status: WikiPage::doEdit() was unsuccessful
+	 */
+	const AS_END = 231;
+
+	/**
+	 * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
+	 */
+	const AS_SPAM_ERROR = 232;
+
+	/**
+	 * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
+	 */
+	const AS_IMAGE_REDIRECT_ANON = 233;
+
+	/**
+	 * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
+	 */
+	const AS_IMAGE_REDIRECT_LOGGED = 234;
+
+	/**
+	 * Status: user tried to modify the content model, but is not allowed to do that
+	 * ( User::isAllowed('editcontentmodel') == false )
+	 */
+	const AS_NO_CHANGE_CONTENT_MODEL = 235;
+
+	/**
+	 * Status: user tried to create self-redirect (redirect to the same article) and
+	 * wpIgnoreSelfRedirect == false
+	 */
+	const AS_SELF_REDIRECT = 236;
+
+	/**
+	 * Status: an error relating to change tagging. Look at the message key for
+	 * more details
+	 */
+	const AS_CHANGE_TAG_ERROR = 237;
+
+	/**
+	 * Status: can't parse content
+	 */
+	const AS_PARSE_ERROR = 240;
+
+	/**
+	 * Status: when changing the content model is disallowed due to
+	 * $wgContentHandlerUseDB being false
+	 */
+	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.
+	 */
+	const EDITFORM_ID = 'editform';
+
+	/**
+	 * Prefix of key for cookie used to pass post-edit state.
+	 * The revision id edited is added after this
+	 */
+	const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
+
+	/**
+	 * Duration of PostEdit cookie, in seconds.
+	 * The cookie will be removed instantly if the JavaScript runs.
+	 *
+	 * Otherwise, though, we don't want the cookies to accumulate.
+	 * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible
+	 * limit of only 20 cookies per domain. This still applies at least to some
+	 * versions of IE without full updates:
+	 * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
+	 *
+	 * A value of 20 minutes should be enough to take into account slow loads and minor
+	 * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
+	 */
+	const POST_EDIT_COOKIE_DURATION = 1200;
+
+	/**
+	 * @deprecated for public usage since 1.30 use EditPage::getArticle()
+	 * @var Article
+	 */
+	public $mArticle;
+	/** @var WikiPage */
+	private $page;
+
+	/**
+	 * @deprecated for public usage since 1.30 use EditPage::getTitle()
+	 * @var Title
+	 */
+	public $mTitle;
+
+	/** @var null|Title */
+	private $mContextTitle = null;
+
+	/** @var string */
+	public $action = 'submit';
+
+	/** @var bool */
+	public $isConflict = false;
+
+	/** @var bool New page or new section */
+	public $isNew = false;
+
+	/** @var bool */
+	public $deletedSinceEdit;
+
+	/** @var string */
+	public $formtype;
+
+	/** @var bool */
+	public $firsttime;
+
+	/** @var bool|stdClass */
+	public $lastDelete;
+
+	/** @var bool */
+	public $mTokenOk = false;
+
+	/** @var bool */
+	public $mTokenOkExceptSuffix = false;
+
+	/** @var bool */
+	public $mTriedSave = false;
+
+	/** @var bool */
+	public $incompleteForm = false;
+
+	/** @var bool */
+	public $tooBig = false;
+
+	/** @var bool */
+	public $missingComment = false;
+
+	/** @var bool */
+	public $missingSummary = false;
+
+	/** @var bool */
+	public $allowBlankSummary = false;
+
+	/** @var bool */
+	protected $blankArticle = false;
+
+	/** @var bool */
+	protected $allowBlankArticle = false;
+
+	/** @var bool */
+	protected $selfRedirect = false;
+
+	/** @var bool */
+	protected $allowSelfRedirect = false;
+
+	/** @var string */
+	public $autoSumm = '';
+
+	/** @var string */
+	public $hookError = '';
+
+	/** @var ParserOutput */
+	public $mParserOutput;
+
+	/** @var bool Has a summary been preset using GET parameter &summary= ? */
+	public $hasPresetSummary = false;
+
+	/** @var Revision|bool|null */
+	public $mBaseRevision = false;
+
+	/** @var bool */
+	public $mShowSummaryField = true;
+
+	# Form values
+
+	/** @var bool */
+	public $save = false;
+
+	/** @var bool */
+	public $preview = false;
+
+	/** @var bool */
+	public $diff = false;
+
+	/** @var bool */
+	public $minoredit = false;
+
+	/** @var bool */
+	public $watchthis = false;
+
+	/** @var bool */
+	public $recreate = false;
+
+	/** @var string */
+	public $textbox1 = '';
+
+	/** @var string */
+	public $textbox2 = '';
+
+	/** @var string */
+	public $summary = '';
+
+	/** @var bool */
+	public $nosummary = false;
+
+	/** @var string */
+	public $edittime = '';
+
+	/** @var int */
+	private $editRevId = null;
+
+	/** @var string */
+	public $section = '';
+
+	/** @var string */
+	public $sectiontitle = '';
+
+	/** @var string */
+	public $starttime = '';
+
+	/** @var int */
+	public $oldid = 0;
+
+	/** @var int */
+	public $parentRevId = 0;
+
+	/** @var string */
+	public $editintro = '';
+
+	/** @var null */
+	public $scrolltop = null;
+
+	/** @var bool */
+	public $bot = true;
+
+	/** @var string */
+	public $contentModel;
+
+	/** @var null|string */
+	public $contentFormat = null;
+
+	/** @var null|array */
+	private $changeTags = null;
+
+	# Placeholders for text injection by hooks (must be HTML)
+	# extensions should take care to _append_ to the present value
+
+	/** @var string Before even the preview */
+	public $editFormPageTop = '';
+	public $editFormTextTop = '';
+	public $editFormTextBeforeContent = '';
+	public $editFormTextAfterWarn = '';
+	public $editFormTextAfterTools = '';
+	public $editFormTextBottom = '';
+	public $editFormTextAfterContent = '';
+	public $previewTextAfterContent = '';
+	public $mPreloadContent = null;
+
+	/* $didSave should be set to true whenever an article was successfully altered. */
+	public $didSave = false;
+	public $undidRev = 0;
+
+	public $suppressIntro = false;
+
+	/** @var bool */
+	protected $edit;
+
+	/** @var bool|int */
+	protected $contentLength = false;
+
+	/**
+	 * @var bool Set in ApiEditPage, based on ContentHandler::allowsDirectApiEditing
+	 */
+	private $enableApiEditOverride = false;
+
+	/**
+	 * @var IContextSource
+	 */
+	protected $context;
+
+	/**
+	 * @var bool Whether an old revision is edited
+	 */
+	private $isOldRev = false;
+
+	/**
+	 * @var string|null What the user submitted in the 'wpUnicodeCheck' field
+	 */
+	private $unicodeCheck;
+
+	/**
+	 * Factory function to create an edit conflict helper
+	 *
+	 * @var callable
+	 */
+	private $editConflictHelperFactory;
+
+	/**
+	 * @var TextConflictHelper|null
+	 */
+	private $editConflictHelper;
+
+	/**
+	 * @param Article $article
+	 */
+	public function __construct( Article $article ) {
+		$this->mArticle = $article;
+		$this->page = $article->getPage(); // model object
+		$this->mTitle = $article->getTitle();
+		$this->context = $article->getContext();
+
+		$this->contentModel = $this->mTitle->getContentModel();
+
+		$handler = ContentHandler::getForModelID( $this->contentModel );
+		$this->contentFormat = $handler->getDefaultFormat();
+		$this->editConflictHelperFactory = [ $this, 'newTextConflictHelper' ];
+	}
+
+	/**
+	 * @return Article
+	 */
+	public function getArticle() {
+		return $this->mArticle;
+	}
+
+	/**
+	 * @since 1.28
+	 * @return IContextSource
+	 */
+	public function getContext() {
+		return $this->context;
+	}
+
+	/**
+	 * @since 1.19
+	 * @return Title
+	 */
+	public function getTitle() {
+		return $this->mTitle;
+	}
+
+	/**
+	 * Set the context Title object
+	 *
+	 * @param Title|null $title Title object or null
+	 */
+	public function setContextTitle( $title ) {
+		$this->mContextTitle = $title;
+	}
+
+	/**
+	 * Get the context title object.
+	 * If not set, $wgTitle will be returned. This behavior might change in
+	 * the future to return $this->mTitle instead.
+	 *
+	 * @return Title
+	 */
+	public function getContextTitle() {
+		if ( is_null( $this->mContextTitle ) ) {
+			wfDebugLog(
+				'GlobalTitleFail',
+				__METHOD__ . ' called by ' . wfGetAllCallers( 5 ) . ' with no title set.'
+			);
+			global $wgTitle;
+			return $wgTitle;
+		} else {
+			return $this->mContextTitle;
+		}
+	}
+
+	/**
+	 * Check if the edit page is using OOUI controls
+	 * @return bool Always true
+	 * @deprecated since 1.30
+	 */
+	public function isOouiEnabled() {
+		wfDeprecated( __METHOD__, '1.30' );
+		return true;
+	}
+
+	/**
+	 * Returns if the given content model is editable.
+	 *
+	 * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
+	 * @return bool
+	 * @throws MWException If $modelId has no known handler
+	 */
+	public function isSupportedContentModel( $modelId ) {
+		return $this->enableApiEditOverride === true ||
+			ContentHandler::getForModelID( $modelId )->supportsDirectEditing();
+	}
+
+	/**
+	 * Allow editing of content that supports API direct editing, but not general
+	 * direct editing. Set to false by default.
+	 *
+	 * @param bool $enableOverride
+	 */
+	public function setApiEditOverride( $enableOverride ) {
+		$this->enableApiEditOverride = $enableOverride;
+	}
+
+	/**
+	 * @deprecated since 1.29, call edit directly
+	 */
+	public function submit() {
+		wfDeprecated( __METHOD__, '1.29' );
+		$this->edit();
+	}
+
+	/**
+	 * This is the function that gets called for "action=edit". It
+	 * sets up various member variables, then passes execution to
+	 * another function, usually showEditForm()
+	 *
+	 * The edit form is self-submitting, so that when things like
+	 * preview and edit conflicts occur, we get the same form back
+	 * with the extra stuff added.  Only when the final submission
+	 * is made and all is well do we actually save and redirect to
+	 * the newly-edited page.
+	 */
+	public function edit() {
+		// Allow extensions to modify/prevent this form or submission
+		if ( !Hooks::run( 'AlternateEdit', [ $this ] ) ) {
+			return;
+		}
+
+		wfDebug( __METHOD__ . ": enter\n" );
+
+		$request = $this->context->getRequest();
+		// If they used redlink=1 and the page exists, redirect to the main article
+		if ( $request->getBool( 'redlink' ) && $this->mTitle->exists() ) {
+			$this->context->getOutput()->redirect( $this->mTitle->getFullURL() );
+			return;
+		}
+
+		$this->importFormData( $request );
+		$this->firsttime = false;
+
+		if ( wfReadOnly() && $this->save ) {
+			// Force preview
+			$this->save = false;
+			$this->preview = true;
+		}
+
+		if ( $this->save ) {
+			$this->formtype = 'save';
+		} elseif ( $this->preview ) {
+			$this->formtype = 'preview';
+		} elseif ( $this->diff ) {
+			$this->formtype = 'diff';
+		} else { # First time through
+			$this->firsttime = true;
+			if ( $this->previewOnOpen() ) {
+				$this->formtype = 'preview';
+			} else {
+				$this->formtype = 'initial';
+			}
+		}
+
+		$permErrors = $this->getEditPermissionErrors( $this->save ? 'secure' : 'full' );
+		if ( $permErrors ) {
+			wfDebug( __METHOD__ . ": User can't edit\n" );
+			// Auto-block user's IP if the account was "hard" blocked
+			if ( !wfReadOnly() ) {
+				DeferredUpdates::addCallableUpdate( function () {
+					$this->context->getUser()->spreadAnyEditBlock();
+				} );
+			}
+			$this->displayPermissionsError( $permErrors );
+
+			return;
+		}
+
+		$revision = $this->mArticle->getRevisionFetched();
+		// Disallow editing revisions with content models different from the current one
+		// Undo edits being an exception in order to allow reverting content model changes.
+		if ( $revision
+			&& $revision->getContentModel() !== $this->contentModel
+		) {
+			$prevRev = null;
+			if ( $this->undidRev ) {
+				$undidRevObj = Revision::newFromId( $this->undidRev );
+				$prevRev = $undidRevObj ? $undidRevObj->getPrevious() : null;
+			}
+			if ( !$this->undidRev
+				|| !$prevRev
+				|| $prevRev->getContentModel() !== $this->contentModel
+			) {
+				$this->displayViewSourcePage(
+					$this->getContentObject(),
+					$this->context->msg(
+						'contentmodelediterror',
+						$revision->getContentModel(),
+						$this->contentModel
+					)->plain()
+				);
+				return;
+			}
+		}
+
+		$this->isConflict = false;
+
+		# Show applicable editing introductions
+		if ( $this->formtype == 'initial' || $this->firsttime ) {
+			$this->showIntro();
+		}
+
+		# Attempt submission here.  This will check for edit conflicts,
+		# and redundantly check for locked database, blocked IPs, etc.
+		# that edit() already checked just in case someone tries to sneak
+		# in the back door with a hand-edited submission URL.
+
+		if ( 'save' == $this->formtype ) {
+			$resultDetails = null;
+			$status = $this->attemptSave( $resultDetails );
+			if ( !$this->handleStatus( $status, $resultDetails ) ) {
+				return;
+			}
+		}
+
+		# First time through: get contents, set time for conflict
+		# checking, etc.
+		if ( 'initial' == $this->formtype || $this->firsttime ) {
+			if ( $this->initialiseForm() === false ) {
+				$this->noSuchSectionPage();
+				return;
+			}
+
+			if ( !$this->mTitle->getArticleID() ) {
+				Hooks::run( 'EditFormPreloadText', [ &$this->textbox1, &$this->mTitle ] );
+			} else {
+				Hooks::run( 'EditFormInitialText', [ $this ] );
+			}
+
+		}
+
+		$this->showEditForm();
+	}
+
+	/**
+	 * @param string $rigor Same format as Title::getUserPermissionErrors()
+	 * @return array
+	 */
+	protected function getEditPermissionErrors( $rigor = 'secure' ) {
+		$user = $this->context->getUser();
+		$permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $user, $rigor );
+		# Can this title be created?
+		if ( !$this->mTitle->exists() ) {
+			$permErrors = array_merge(
+				$permErrors,
+				wfArrayDiff2(
+					$this->mTitle->getUserPermissionsErrors( 'create', $user, $rigor ),
+					$permErrors
+				)
+			);
+		}
+		# Ignore some permissions errors when a user is just previewing/viewing diffs
+		$remove = [];
+		foreach ( $permErrors as $error ) {
+			if ( ( $this->preview || $this->diff )
+				&& (
+					$error[0] == 'blockedtext' ||
+					$error[0] == 'autoblockedtext' ||
+					$error[0] == 'systemblockedtext'
+				)
+			) {
+				$remove[] = $error;
+			}
+		}
+		$permErrors = wfArrayDiff2( $permErrors, $remove );
+
+		return $permErrors;
+	}
+
+	/**
+	 * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
+	 * but with the following differences:
+	 * - If redlink=1, the user will be redirected to the page
+	 * - If there is content to display or the error occurs while either saving,
+	 *   previewing or showing the difference, it will be a
+	 *   "View source for ..." page displaying the source code after the error message.
+	 *
+	 * @since 1.19
+	 * @param array $permErrors Array of permissions errors, as returned by
+	 *    Title::getUserPermissionsErrors().
+	 * @throws PermissionsError
+	 */
+	protected function displayPermissionsError( array $permErrors ) {
+		$out = $this->context->getOutput();
+		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.
+			$out->redirect( $this->mTitle->getFullURL() );
+			return;
+		}
+
+		$content = $this->getContentObject();
+
+		# Use the normal message if there's nothing to display
+		if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
+			$action = $this->mTitle->exists() ? 'edit' :
+				( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
+			throw new PermissionsError( $action, $permErrors );
+		}
+
+		$this->displayViewSourcePage(
+			$content,
+			$out->formatPermissionsErrorMessage( $permErrors, 'edit' )
+		);
+	}
+
+	/**
+	 * Display a read-only View Source page
+	 * @param Content $content
+	 * @param string $errorMessage additional wikitext error message to display
+	 */
+	protected function displayViewSourcePage( Content $content, $errorMessage = '' ) {
+		$out = $this->context->getOutput();
+		Hooks::run( 'EditPage::showReadOnlyForm:initial', [ $this, &$out ] );
+
+		$out->setRobotPolicy( 'noindex,nofollow' );
+		$out->setPageTitle( $this->context->msg(
+			'viewsource-title',
+			$this->getContextTitle()->getPrefixedText()
+		) );
+		$out->addBacklinkSubtitle( $this->getContextTitle() );
+		$out->addHTML( $this->editFormPageTop );
+		$out->addHTML( $this->editFormTextTop );
+
+		if ( $errorMessage !== '' ) {
+			$out->addWikiText( $errorMessage );
+			$out->addHTML( "<hr />\n" );
+		}
+
+		# If the user made changes, preserve them when showing the markup
+		# (This happens when a user is blocked during edit, for instance)
+		if ( !$this->firsttime ) {
+			$text = $this->textbox1;
+			$out->addWikiMsg( 'viewyourtext' );
+		} else {
+			try {
+				$text = $this->toEditText( $content );
+			} catch ( MWException $e ) {
+				# Serialize using the default format if the content model is not supported
+				# (e.g. for an old revision with a different model)
+				$text = $content->serialize();
+			}
+			$out->addWikiMsg( 'viewsourcetext' );
+		}
+
+		$out->addHTML( $this->editFormTextBeforeContent );
+		$this->showTextbox( $text, 'wpTextbox1', [ 'readonly' ] );
+		$out->addHTML( $this->editFormTextAfterContent );
+
+		$out->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
+
+		$out->addModules( 'mediawiki.action.edit.collapsibleFooter' );
+
+		$out->addHTML( $this->editFormTextBottom );
+		if ( $this->mTitle->exists() ) {
+			$out->returnToMain( null, $this->mTitle );
+		}
+	}
+
+	/**
+	 * Should we show a preview when the edit form is first shown?
+	 *
+	 * @return bool
+	 */
+	protected function previewOnOpen() {
+		$config = $this->context->getConfig();
+		$previewOnOpenNamespaces = $config->get( 'PreviewOnOpenNamespaces' );
+		$request = $this->context->getRequest();
+		if ( $config->get( 'RawHtml' ) ) {
+			// If raw HTML is enabled, disable preview on open
+			// since it has to be posted with a token for
+			// security reasons
+			return false;
+		}
+		if ( $request->getVal( 'preview' ) == 'yes' ) {
+			// Explicit override from request
+			return true;
+		} elseif ( $request->getVal( 'preview' ) == 'no' ) {
+			// Explicit override from request
+			return false;
+		} elseif ( $this->section == 'new' ) {
+			// Nothing *to* preview for new sections
+			return false;
+		} elseif ( ( $request->getVal( 'preload' ) !== null || $this->mTitle->exists() )
+			&& $this->context->getUser()->getOption( 'previewonfirst' )
+		) {
+			// Standard preference behavior
+			return true;
+		} elseif ( !$this->mTitle->exists()
+			&& isset( $previewOnOpenNamespaces[$this->mTitle->getNamespace()] )
+			&& $previewOnOpenNamespaces[$this->mTitle->getNamespace()]
+		) {
+			// Categories are special
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 * Checks whether the user entered a skin name in uppercase,
+	 * e.g. "User:Example/Monobook.css" instead of "monobook.css"
+	 *
+	 * @return bool
+	 */
+	protected function isWrongCaseUserConfigPage() {
+		if ( $this->mTitle->isUserConfigPage() ) {
+			$name = $this->mTitle->getSkinFromConfigSubpage();
+			$skins = array_merge(
+				array_keys( Skin::getSkinNames() ),
+				[ 'common' ]
+			);
+			return !in_array( $name, $skins )
+				&& in_array( strtolower( $name ), $skins );
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 * Returns whether section editing is supported for the current page.
+	 * Subclasses may override this to replace the default behavior, which is
+	 * to check ContentHandler::supportsSections.
+	 *
+	 * @return bool True if this edit page supports sections, false otherwise.
+	 */
+	protected function isSectionEditSupported() {
+		$contentHandler = ContentHandler::getForTitle( $this->mTitle );
+		return $contentHandler->supportsSections();
+	}
+
+	/**
+	 * This function collects the form data and uses it to populate various member variables.
+	 * @param WebRequest &$request
+	 * @throws ErrorPageError
+	 */
+	public function importFormData( &$request ) {
+		# Section edit can come from either the form or a link
+		$this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
+
+		if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
+			throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
+		}
+
+		$this->isNew = !$this->mTitle->exists() || $this->section == 'new';
+
+		if ( $request->wasPosted() ) {
+			# 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 = 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
+				// modified by subclasses
+				$textbox1 = $this->importContentFormData( $request );
+				if ( $textbox1 !== null ) {
+					$this->textbox1 = $textbox1;
+				}
+			}
+
+			$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
+			# header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
+			# section titles.
+			$this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
+
+			# Treat sectiontitle the same way as summary.
+			# Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
+			# currently doing double duty as both edit summary and section title. Right now this
+			# is just to allow API edits to work around this limitation, but this should be
+			# incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
+			$this->sectiontitle = $request->getText( 'wpSectionTitle' );
+			$this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
+
+			$this->edittime = $request->getVal( 'wpEdittime' );
+			$this->editRevId = $request->getIntOrNull( 'editRevId' );
+			$this->starttime = $request->getVal( 'wpStarttime' );
+
+			$undidRev = $request->getInt( 'wpUndidRevision' );
+			if ( $undidRev ) {
+				$this->undidRev = $undidRev;
+			}
+
+			$this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
+
+			if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
+				// wpTextbox1 field is missing, possibly due to being "too big"
+				// according to some filter rules such as Suhosin's setting for
+				// suhosin.request.max_value_length (d'oh)
+				$this->incompleteForm = true;
+			} else {
+				// If we receive the last parameter of the request, we can fairly
+				// claim the POST request has not been truncated.
+
+				// TODO: softened the check for cutover.  Once we determine
+				// that it is safe, we should complete the transition by
+				// removing the "edittime" clause.
+				$this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' )
+					&& is_null( $this->edittime ) );
+			}
+			if ( $this->incompleteForm ) {
+				# If the form is incomplete, force to preview.
+				wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
+				wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
+				$this->preview = true;
+			} else {
+				$this->preview = $request->getCheck( 'wpPreview' );
+				$this->diff = $request->getCheck( 'wpDiff' );
+
+				// Remember whether a save was requested, so we can indicate
+				// if we forced preview due to session failure.
+				$this->mTriedSave = !$this->preview;
+
+				if ( $this->tokenOk( $request ) ) {
+					# Some browsers will not report any submit button
+					# if the user hits enter in the comment box.
+					# The unmarked state will be assumed to be a save,
+					# if the form seems otherwise complete.
+					wfDebug( __METHOD__ . ": Passed token check.\n" );
+				} elseif ( $this->diff ) {
+					# Failed token check, but only requested "Show Changes".
+					wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
+				} else {
+					# Page might be a hack attempt posted from
+					# an external site. Preview instead of saving.
+					wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
+					$this->preview = true;
+				}
+			}
+			$this->save = !$this->preview && !$this->diff;
+			if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
+				$this->edittime = null;
+			}
+
+			if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
+				$this->starttime = null;
+			}
+
+			$this->recreate = $request->getCheck( 'wpRecreate' );
+
+			$this->minoredit = $request->getCheck( 'wpMinoredit' );
+			$this->watchthis = $request->getCheck( 'wpWatchthis' );
+
+			$user = $this->context->getUser();
+			# Don't force edit summaries when a user is editing their own user or talk page
+			if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
+				&& $this->mTitle->getText() == $user->getName()
+			) {
+				$this->allowBlankSummary = true;
+			} else {
+				$this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
+					|| !$user->getOption( 'forceeditsummary' );
+			}
+
+			$this->autoSumm = $request->getText( 'wpAutoSummary' );
+
+			$this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
+			$this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
+
+			$changeTags = $request->getVal( 'wpChangeTags' );
+			if ( is_null( $changeTags ) || $changeTags === '' ) {
+				$this->changeTags = [];
+			} else {
+				$this->changeTags = array_filter( array_map( 'trim', explode( ',',
+					$changeTags ) ) );
+			}
+		} else {
+			# Not a posted form? Start with nothing.
+			wfDebug( __METHOD__ . ": Not a posted form.\n" );
+			$this->textbox1 = '';
+			$this->summary = '';
+			$this->sectiontitle = '';
+			$this->edittime = '';
+			$this->editRevId = null;
+			$this->starttime = wfTimestampNow();
+			$this->edit = false;
+			$this->preview = false;
+			$this->save = false;
+			$this->diff = false;
+			$this->minoredit = false;
+			// Watch may be overridden by request parameters
+			$this->watchthis = $request->getBool( 'watchthis', false );
+			$this->recreate = false;
+
+			// When creating a new section, we can preload a section title by passing it as the
+			// preloadtitle parameter in the URL (T15100)
+			if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
+				$this->sectiontitle = $request->getVal( 'preloadtitle' );
+				// Once wpSummary isn't being use for setting section titles, we should delete this.
+				$this->summary = $request->getVal( 'preloadtitle' );
+			} elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
+				$this->summary = $request->getText( 'summary' );
+				if ( $this->summary !== '' ) {
+					$this->hasPresetSummary = true;
+				}
+			}
+
+			if ( $request->getVal( 'minor' ) ) {
+				$this->minoredit = true;
+			}
+		}
+
+		$this->oldid = $request->getInt( 'oldid' );
+		$this->parentRevId = $request->getInt( 'parentRevId' );
+
+		$this->bot = $request->getBool( 'bot', true );
+		$this->nosummary = $request->getBool( 'nosummary' );
+
+		// May be overridden by revision.
+		$this->contentModel = $request->getText( 'model', $this->contentModel );
+		// May be overridden by revision.
+		$this->contentFormat = $request->getText( 'format', $this->contentFormat );
+
+		try {
+			$handler = ContentHandler::getForModelID( $this->contentModel );
+		} catch ( MWUnknownContentModelException $e ) {
+			throw new ErrorPageError(
+				'editpage-invalidcontentmodel-title',
+				'editpage-invalidcontentmodel-text',
+				[ wfEscapeWikiText( $this->contentModel ) ]
+			);
+		}
+
+		if ( !$handler->isSupportedFormat( $this->contentFormat ) ) {
+			throw new ErrorPageError(
+				'editpage-notsupportedcontentformat-title',
+				'editpage-notsupportedcontentformat-text',
+				[
+					wfEscapeWikiText( $this->contentFormat ),
+					wfEscapeWikiText( ContentHandler::getLocalizedName( $this->contentModel ) )
+				]
+			);
+		}
+
+		/**
+		 * @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.
+		 */
+
+		$this->editintro = $request->getText( 'editintro',
+			// Custom edit intro for new sections
+			$this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
+
+		// Allow extensions to modify form data
+		Hooks::run( 'EditPage::importFormData', [ $this, $request ] );
+	}
+
+	/**
+	 * Subpage overridable method for extracting the page content data from the
+	 * posted form to be placed in $this->textbox1, if using customized input
+	 * this method should be overridden and return the page text that will be used
+	 * for saving, preview parsing and so on...
+	 *
+	 * @param WebRequest &$request
+	 * @return string|null
+	 */
+	protected function importContentFormData( &$request ) {
+		return; // Don't do anything, EditPage already extracted wpTextbox1
+	}
+
+	/**
+	 * Initialise form fields in the object
+	 * Called on the first invocation, e.g. when a user clicks an edit link
+	 * @return bool If the requested section is valid
+	 */
+	public function initialiseForm() {
+		$this->edittime = $this->page->getTimestamp();
+		$this->editRevId = $this->page->getLatest();
+
+		$content = $this->getContentObject( false ); # TODO: track content object?!
+		if ( $content === false ) {
+			return false;
+		}
+		$this->textbox1 = $this->toEditText( $content );
+
+		$user = $this->context->getUser();
+		// activate checkboxes if user wants them to be always active
+		# Sort out the "watch" checkbox
+		if ( $user->getOption( 'watchdefault' ) ) {
+			# Watch all edits
+			$this->watchthis = true;
+		} elseif ( $user->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
+			# Watch creations
+			$this->watchthis = true;
+		} elseif ( $user->isWatched( $this->mTitle ) ) {
+			# Already watched
+			$this->watchthis = true;
+		}
+		if ( $user->getOption( 'minordefault' ) && !$this->isNew ) {
+			$this->minoredit = true;
+		}
+		if ( $this->textbox1 === false ) {
+			return false;
+		}
+		return true;
+	}
+
+	/**
+	 * @param Content|null $def_content The default value to return
+	 *
+	 * @return Content|null Content on success, $def_content for invalid sections
+	 *
+	 * @since 1.21
+	 */
+	protected function getContentObject( $def_content = null ) {
+		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' ) {
+			if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
+				# If this is a system message, get the default text.
+				$msg = $this->mTitle->getDefaultMessageText();
+
+				$content = $this->toEditContent( $msg );
+			}
+			if ( $content === false ) {
+				# If requested, preload some text.
+				$preload = $request->getVal( 'preload',
+					// Custom preload text for new sections
+					$this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
+				$params = $request->getArray( 'preloadparams', [] );
+
+				$content = $this->getPreloadedContent( $preload, $params );
+			}
+		// For existing pages, get text based on "undo" or section parameters.
+		} else {
+			if ( $this->section != '' ) {
+				// Get section edit text (returns $def_text for invalid sections)
+				$orig = $this->getOriginalContent( $user );
+				$content = $orig ? $orig->getSection( $this->section ) : null;
+
+				if ( !$content ) {
+					$content = $def_content;
+				}
+			} else {
+				$undoafter = $request->getInt( 'undoafter' );
+				$undo = $request->getInt( 'undo' );
+
+				if ( $undo > 0 && $undoafter > 0 ) {
+					$undorev = Revision::newFromId( $undo );
+					$oldrev = Revision::newFromId( $undoafter );
+
+					# Sanity check, make sure it's the right page,
+					# the revisions exist and they were not deleted.
+					# Otherwise, $content will be left as-is.
+					if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
+						!$undorev->isDeleted( Revision::DELETED_TEXT ) &&
+						!$oldrev->isDeleted( Revision::DELETED_TEXT )
+					) {
+						$content = $this->page->getUndoContent( $undorev, $oldrev );
+
+						if ( $content === false ) {
+							# Warn the user that something went wrong
+							$undoMsg = 'failure';
+						} else {
+							$oldContent = $this->page->getContent( Revision::RAW );
+							$popts = ParserOptions::newFromUserAndLang( $user, $wgContLang );
+							$newContent = $content->preSaveTransform( $this->mTitle, $user, $popts );
+							if ( $newContent->getModel() !== $oldContent->getModel() ) {
+								// The undo may change content
+								// model if its reverting the top
+								// edit. This can result in
+								// mismatched content model/format.
+								$this->contentModel = $newContent->getModel();
+								$this->contentFormat = $oldrev->getContentFormat();
+							}
+
+							if ( $newContent->equals( $oldContent ) ) {
+								# Tell the user that the undo results in no change,
+								# i.e. the revisions were already undone.
+								$undoMsg = 'nochange';
+								$content = false;
+							} else {
+								# Inform the user of our success and set an automatic edit summary
+								$undoMsg = 'success';
+
+								# If we just undid one rev, use an autosummary
+								$firstrev = $oldrev->getNext();
+								if ( $firstrev && $firstrev->getId() == $undo ) {
+									$userText = $undorev->getUserText();
+									if ( $userText === '' ) {
+										$undoSummary = $this->context->msg(
+											'undo-summary-username-hidden',
+											$undo
+										)->inContentLanguage()->text();
+									} else {
+										$undoSummary = $this->context->msg(
+											'undo-summary',
+											$undo,
+											$userText
+										)->inContentLanguage()->text();
+									}
+									if ( $this->summary === '' ) {
+										$this->summary = $undoSummary;
+									} else {
+										$this->summary = $undoSummary . $this->context->msg( 'colon-separator' )
+											->inContentLanguage()->text() . $this->summary;
+									}
+									$this->undidRev = $undo;
+								}
+								$this->formtype = 'diff';
+							}
+						}
+					} else {
+						// Failed basic sanity checks.
+						// Older revisions may have been removed since the link
+						// was created, or we may simply have got bogus input.
+						$undoMsg = 'norev';
+					}
+
+					$out = $this->context->getOutput();
+					// Messages: undo-success, undo-failure, undo-norev, undo-nochange
+					$class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
+					$this->editFormPageTop .= $out->parse( "<div class=\"{$class}\">" .
+						$this->context->msg( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
+				}
+
+				if ( $content === false ) {
+					$content = $this->getOriginalContent( $user );
+				}
+			}
+		}
+
+		return $content;
+	}
+
+	/**
+	 * Get the content of the wanted revision, without section extraction.
+	 *
+	 * The result of this function can be used to compare user's input with
+	 * section replaced in its context (using WikiPage::replaceSectionAtRev())
+	 * to the original text of the edit.
+	 *
+	 * This differs from Article::getContent() that when a missing revision is
+	 * encountered the result will be null and not the
+	 * 'missing-revision' message.
+	 *
+	 * @since 1.19
+	 * @param User $user The user to get the revision for
+	 * @return Content|null
+	 */
+	private function getOriginalContent( User $user ) {
+		if ( $this->section == 'new' ) {
+			return $this->getCurrentContent();
+		}
+		$revision = $this->mArticle->getRevisionFetched();
+		if ( $revision === null ) {
+			$handler = ContentHandler::getForModelID( $this->contentModel );
+			return $handler->makeEmptyContent();
+		}
+		$content = $revision->getContent( Revision::FOR_THIS_USER, $user );
+		return $content;
+	}
+
+	/**
+	 * Get the edit's parent revision ID
+	 *
+	 * The "parent" revision is the ancestor that should be recorded in this
+	 * page's revision history.  It is either the revision ID of the in-memory
+	 * article content, or in the case of a 3-way merge in order to rebase
+	 * across a recoverable edit conflict, the ID of the newer revision to
+	 * which we have rebased this page.
+	 *
+	 * @since 1.27
+	 * @return int Revision ID
+	 */
+	public function getParentRevId() {
+		if ( $this->parentRevId ) {
+			return $this->parentRevId;
+		} else {
+			return $this->mArticle->getRevIdFetched();
+		}
+	}
+
+	/**
+	 * Get the current content of the page. This is basically similar to
+	 * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
+	 * content object is returned instead of null.
+	 *
+	 * @since 1.21
+	 * @return Content
+	 */
+	protected function getCurrentContent() {
+		$rev = $this->page->getRevision();
+		$content = $rev ? $rev->getContent( Revision::RAW ) : null;
+
+		if ( $content === false || $content === null ) {
+			$handler = ContentHandler::getForModelID( $this->contentModel );
+			return $handler->makeEmptyContent();
+		} elseif ( !$this->undidRev ) {
+			// Content models should always be the same since we error
+			// out if they are different before this point (in ->edit()).
+			// The exception being, during an undo, the current revision might
+			// differ from the prior revision.
+			$logger = LoggerFactory::getInstance( 'editpage' );
+			if ( $this->contentModel !== $rev->getContentModel() ) {
+				$logger->warning( "Overriding content model from current edit {prev} to {new}", [
+					'prev' => $this->contentModel,
+					'new' => $rev->getContentModel(),
+					'title' => $this->getTitle()->getPrefixedDBkey(),
+					'method' => __METHOD__
+				] );
+				$this->contentModel = $rev->getContentModel();
+			}
+
+			// Given that the content models should match, the current selected
+			// format should be supported.
+			if ( !$content->isSupportedFormat( $this->contentFormat ) ) {
+				$logger->warning( "Current revision content format unsupported. Overriding {prev} to {new}", [
+
+					'prev' => $this->contentFormat,
+					'new' => $rev->getContentFormat(),
+					'title' => $this->getTitle()->getPrefixedDBkey(),
+					'method' => __METHOD__
+				] );
+				$this->contentFormat = $rev->getContentFormat();
+			}
+		}
+		return $content;
+	}
+
+	/**
+	 * Use this method before edit() to preload some content into the edit box
+	 *
+	 * @param Content $content
+	 *
+	 * @since 1.21
+	 */
+	public function setPreloadedContent( Content $content ) {
+		$this->mPreloadContent = $content;
+	}
+
+	/**
+	 * Get the contents to be preloaded into the box, either set by
+	 * an earlier setPreloadText() or by loading the given page.
+	 *
+	 * @param string $preload Representing the title to preload from.
+	 * @param array $params Parameters to use (interface-message style) in the preloaded text
+	 *
+	 * @return Content
+	 *
+	 * @since 1.21
+	 */
+	protected function getPreloadedContent( $preload, $params = [] ) {
+		if ( !empty( $this->mPreloadContent ) ) {
+			return $this->mPreloadContent;
+		}
+
+		$handler = ContentHandler::getForModelID( $this->contentModel );
+
+		if ( $preload === '' ) {
+			return $handler->makeEmptyContent();
+		}
+
+		$user = $this->context->getUser();
+		$title = Title::newFromText( $preload );
+		# Check for existence to avoid getting MediaWiki:Noarticletext
+		if ( $title === null || !$title->exists() || !$title->userCan( 'read', $user ) ) {
+			// TODO: somehow show a warning to the user!
+			return $handler->makeEmptyContent();
+		}
+
+		$page = WikiPage::factory( $title );
+		if ( $page->isRedirect() ) {
+			$title = $page->getRedirectTarget();
+			# Same as before
+			if ( $title === null || !$title->exists() || !$title->userCan( 'read', $user ) ) {
+				// TODO: somehow show a warning to the user!
+				return $handler->makeEmptyContent();
+			}
+			$page = WikiPage::factory( $title );
+		}
+
+		$parserOptions = ParserOptions::newFromUser( $user );
+		$content = $page->getContent( Revision::RAW );
+
+		if ( !$content ) {
+			// TODO: somehow show a warning to the user!
+			return $handler->makeEmptyContent();
+		}
+
+		if ( $content->getModel() !== $handler->getModelID() ) {
+			$converted = $content->convert( $handler->getModelID() );
+
+			if ( !$converted ) {
+				// TODO: somehow show a warning to the user!
+				wfDebug( "Attempt to preload incompatible content: " .
+					"can't convert " . $content->getModel() .
+					" to " . $handler->getModelID() );
+
+				return $handler->makeEmptyContent();
+			}
+
+			$content = $converted;
+		}
+
+		return $content->preloadTransform( $title, $parserOptions, $params );
+	}
+
+	/**
+	 * Make sure the form isn't faking a user's credentials.
+	 *
+	 * @param WebRequest &$request
+	 * @return bool
+	 * @private
+	 */
+	public function tokenOk( &$request ) {
+		$token = $request->getVal( 'wpEditToken' );
+		$user = $this->context->getUser();
+		$this->mTokenOk = $user->matchEditToken( $token );
+		$this->mTokenOkExceptSuffix = $user->matchEditTokenNoSuffix( $token );
+		return $this->mTokenOk;
+	}
+
+	/**
+	 * Sets post-edit cookie indicating the user just saved a particular revision.
+	 *
+	 * This uses a temporary cookie for each revision ID so separate saves will never
+	 * interfere with each other.
+	 *
+	 * Article::view deletes the cookie on server-side after the redirect and
+	 * converts the value to the global JavaScript variable wgPostEdit.
+	 *
+	 * If the variable were set on the server, it would be cached, which is unwanted
+	 * since the post-edit state should only apply to the load right after the save.
+	 *
+	 * @param int $statusValue The status value (to check for new article status)
+	 */
+	protected function setPostEditCookie( $statusValue ) {
+		$revisionId = $this->page->getLatest();
+		$postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
+
+		$val = 'saved';
+		if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
+			$val = 'created';
+		} elseif ( $this->oldid ) {
+			$val = 'restored';
+		}
+
+		$response = $this->context->getRequest()->response();
+		$response->setCookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION );
+	}
+
+	/**
+	 * Attempt submission
+	 * @param array|bool &$resultDetails See docs for $result in internalAttemptSave
+	 * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
+	 * @return Status The resulting status object.
+	 */
+	public function attemptSave( &$resultDetails = false ) {
+		# Allow bots to exempt some edits from bot flagging
+		$bot = $this->context->getUser()->isAllowed( 'bot' ) && $this->bot;
+		$status = $this->internalAttemptSave( $resultDetails, $bot );
+
+		Hooks::run( 'EditPage::attemptSave:after', [ $this, $status, $resultDetails ] );
+
+		return $status;
+	}
+
+	/**
+	 * Log when a page was successfully saved after the edit conflict view
+	 */
+	private function incrementResolvedConflicts() {
+		if ( $this->context->getRequest()->getText( 'mode' ) !== 'conflict' ) {
+			return;
+		}
+
+		$this->getEditConflictHelper()->incrementResolvedStats();
+	}
+
+	/**
+	 * Handle status, such as after attempt save
+	 *
+	 * @param Status $status
+	 * @param array|bool $resultDetails
+	 *
+	 * @throws ErrorPageError
+	 * @return bool False, if output is done, true if rest of the form should be displayed
+	 */
+	private function handleStatus( Status $status, $resultDetails ) {
+		/**
+		 * @todo FIXME: once the interface for internalAttemptSave() is made
+		 *   nicer, this should use the message in $status
+		 */
+		if ( $status->value == self::AS_SUCCESS_UPDATE
+			|| $status->value == self::AS_SUCCESS_NEW_ARTICLE
+		) {
+			$this->incrementResolvedConflicts();
+
+			$this->didSave = true;
+			if ( !$resultDetails['nullEdit'] ) {
+				$this->setPostEditCookie( $status->value );
+			}
+		}
+
+		$out = $this->context->getOutput();
+
+		// "wpExtraQueryRedirect" is a hidden input to modify
+		// after save URL and is not used by actual edit form
+		$request = $this->context->getRequest();
+		$extraQueryRedirect = $request->getVal( 'wpExtraQueryRedirect' );
+
+		switch ( $status->value ) {
+			case self::AS_HOOK_ERROR_EXPECTED:
+			case self::AS_CONTENT_TOO_BIG:
+			case self::AS_ARTICLE_WAS_DELETED:
+			case self::AS_CONFLICT_DETECTED:
+			case self::AS_SUMMARY_NEEDED:
+			case self::AS_TEXTBOX_EMPTY:
+			case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
+			case self::AS_END:
+			case self::AS_BLANK_ARTICLE:
+			case self::AS_SELF_REDIRECT:
+				return true;
+
+			case self::AS_HOOK_ERROR:
+				return false;
+
+			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;
+
+			case self::AS_SUCCESS_NEW_ARTICLE:
+				$query = $resultDetails['redirect'] ? 'redirect=no' : '';
+				if ( $extraQueryRedirect ) {
+					if ( $query === '' ) {
+						$query = $extraQueryRedirect;
+					} else {
+						$query = $query . '&' . $extraQueryRedirect;
+					}
+				}
+				$anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
+				$out->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
+				return false;
+
+			case self::AS_SUCCESS_UPDATE:
+				$extraQuery = '';
+				$sectionanchor = $resultDetails['sectionanchor'];
+
+				// Give extensions a chance to modify URL query on update
+				Hooks::run(
+					'ArticleUpdateBeforeRedirect',
+					[ $this->mArticle, &$sectionanchor, &$extraQuery ]
+				);
+
+				if ( $resultDetails['redirect'] ) {
+					if ( $extraQuery == '' ) {
+						$extraQuery = 'redirect=no';
+					} else {
+						$extraQuery = 'redirect=no&' . $extraQuery;
+					}
+				}
+				if ( $extraQueryRedirect ) {
+					if ( $extraQuery === '' ) {
+						$extraQuery = $extraQueryRedirect;
+					} else {
+						$extraQuery = $extraQuery . '&' . $extraQueryRedirect;
+					}
+				}
+
+				$out->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
+				return false;
+
+			case self::AS_SPAM_ERROR:
+				$this->spamPageWithContent( $resultDetails['spam'] );
+				return false;
+
+			case self::AS_BLOCKED_PAGE_FOR_USER:
+				throw new UserBlockedError( $this->context->getUser()->getBlock() );
+
+			case self::AS_IMAGE_REDIRECT_ANON:
+			case self::AS_IMAGE_REDIRECT_LOGGED:
+				throw new PermissionsError( 'upload' );
+
+			case self::AS_READ_ONLY_PAGE_ANON:
+			case self::AS_READ_ONLY_PAGE_LOGGED:
+				throw new PermissionsError( 'edit' );
+
+			case self::AS_READ_ONLY_PAGE:
+				throw new ReadOnlyError;
+
+			case self::AS_RATE_LIMITED:
+				throw new ThrottledError();
+
+			case self::AS_NO_CREATE_PERMISSION:
+				$permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
+				throw new PermissionsError( $permission );
+
+			case self::AS_NO_CHANGE_CONTENT_MODEL:
+				throw new PermissionsError( 'editcontentmodel' );
+
+			default:
+				// We don't recognize $status->value. The only way that can happen
+				// is if an extension hook aborted from inside ArticleSave.
+				// Render the status object into $this->hookError
+				// FIXME this sucks, we should just use the Status object throughout
+				$this->hookError = '<div class="error">' ."\n" . $status->getWikiText() .
+					'</div>';
+				return true;
+		}
+	}
+
+	/**
+	 * Run hooks that can filter edits just before they get saved.
+	 *
+	 * @param Content $content The Content to filter.
+	 * @param Status $status For reporting the outcome to the caller
+	 * @param User $user The user performing the edit
+	 *
+	 * @return bool
+	 */
+	protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
+		// Run old style post-section-merge edit filter
+		if ( $this->hookError != '' ) {
+			# ...or the hook could be expecting us to produce an error
+			$status->fatal( 'hookaborted' );
+			$status->value = self::AS_HOOK_ERROR_EXPECTED;
+			return false;
+		}
+
+		// Run new style post-section-merge edit filter
+		if ( !Hooks::run( 'EditFilterMergedContent',
+				[ $this->context, $content, $status, $this->summary,
+				$user, $this->minoredit ] )
+		) {
+			# Error messages etc. could be handled within the hook...
+			if ( $status->isGood() ) {
+				$status->fatal( 'hookaborted' );
+				// Not setting $this->hookError here is a hack to allow the hook
+				// to cause a return to the edit page without $this->hookError
+				// being set. This is used by ConfirmEdit to display a captcha
+				// without any error message cruft.
+			} else {
+				$this->hookError = $this->formatStatusErrors( $status );
+			}
+			// Use the existing $status->value if the hook set it
+			if ( !$status->value ) {
+				$status->value = self::AS_HOOK_ERROR;
+			}
+			return false;
+		} elseif ( !$status->isOK() ) {
+			# ...or the hook could be expecting us to produce an error
+			// FIXME this sucks, we should just use the Status object throughout
+			$this->hookError = $this->formatStatusErrors( $status );
+			$status->fatal( 'hookaborted' );
+			$status->value = self::AS_HOOK_ERROR_EXPECTED;
+			return false;
+		}
+
+		return true;
+	}
+
+	/**
+	 * Wrap status errors in an errorbox for increased visibility
+	 *
+	 * @param Status $status
+	 * @return string Wikitext
+	 */
+	private function formatStatusErrors( Status $status ) {
+		$errmsg = $status->getWikiText(
+			'edit-error-short',
+			'edit-error-long',
+			$this->context->getLanguage()
+		);
+		return <<<ERROR
+<div class="errorbox">
+{$errmsg}
+</div>
+<br clear="all" />
+ERROR;
+	}
+
+	/**
+	 * Return the summary to be used for a new section.
+	 *
+	 * @param string $sectionanchor Set to the section anchor text
+	 * @return string
+	 */
+	private function newSectionSummary( &$sectionanchor = null ) {
+		global $wgParser;
+
+		if ( $this->sectiontitle !== '' ) {
+			$sectionanchor = $this->guessSectionName( $this->sectiontitle );
+			// If no edit summary was specified, create one automatically from the section
+			// title and have it link to the new section. Otherwise, respect the summary as
+			// passed.
+			if ( $this->summary === '' ) {
+				$cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
+				return $this->context->msg( 'newsectionsummary' )
+					->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
+			}
+		} elseif ( $this->summary !== '' ) {
+			$sectionanchor = $this->guessSectionName( $this->summary );
+			# This is a new section, so create a link to the new section
+			# in the revision summary.
+			$cleanSummary = $wgParser->stripSectionName( $this->summary );
+			return $this->context->msg( 'newsectionsummary' )
+				->rawParams( $cleanSummary )->inContentLanguage()->text();
+		}
+		return $this->summary;
+	}
+
+	/**
+	 * Attempt submission (no UI)
+	 *
+	 * @param array &$result Array to add statuses to, currently with the
+	 *   possible keys:
+	 *   - spam (string): Spam string from content if any spam is detected by
+	 *     matchSpamRegex.
+	 *   - sectionanchor (string): Section anchor for a section save.
+	 *   - nullEdit (bool): Set if doEditContent is OK.  True if null edit,
+	 *     false otherwise.
+	 *   - redirect (bool): Set if doEditContent is OK. True if resulting
+	 *     revision is a redirect.
+	 * @param bool $bot True if edit is being made under the bot right.
+	 *
+	 * @return Status Status object, possibly with a message, but always with
+	 *   one of the AS_* constants in $status->value,
+	 *
+	 * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
+	 *   various error display idiosyncrasies. There are also lots of cases
+	 *   where error metadata is set in the object and retrieved later instead
+	 *   of being returned, e.g. AS_CONTENT_TOO_BIG and
+	 *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
+	 * time.
+	 */
+	public function internalAttemptSave( &$result, $bot = false ) {
+		$status = Status::newGood();
+		$user = $this->context->getUser();
+
+		if ( !Hooks::run( 'EditPage::attemptSave', [ $this ] ) ) {
+			wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
+			$status->fatal( 'hookaborted' );
+			$status->value = self::AS_HOOK_ERROR;
+			return $status;
+		}
+
+		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',
+				$user->getName() .
+				' editing "' .
+				$this->mTitle->getPrefixedText() .
+				'" submitted bogus field "' .
+				$spam .
+				'"'
+			);
+			$status->fatal( 'spamprotectionmatch', false );
+			$status->value = self::AS_SPAM_ERROR;
+			return $status;
+		}
+
+		try {
+			# Construct Content object
+			$textbox_content = $this->toEditContent( $this->textbox1 );
+		} catch ( MWContentSerializationException $ex ) {
+			$status->fatal(
+				'content-failed-to-parse',
+				$this->contentModel,
+				$this->contentFormat,
+				$ex->getMessage()
+			);
+			$status->value = self::AS_PARSE_ERROR;
+			return $status;
+		}
+
+		# Check image redirect
+		if ( $this->mTitle->getNamespace() == NS_FILE &&
+			$textbox_content->isRedirect() &&
+			!$user->isAllowed( 'upload' )
+		) {
+				$code = $user->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
+				$status->setResult( false, $code );
+
+				return $status;
+		}
+
+		# Check for spam
+		$match = self::matchSummarySpamRegex( $this->summary );
+		if ( $match === false && $this->section == 'new' ) {
+			# $wgSpamRegex is enforced on this new heading/summary because, unlike
+			# regular summaries, it is added to the actual wikitext.
+			if ( $this->sectiontitle !== '' ) {
+				# This branch is taken when the API is used with the 'sectiontitle' parameter.
+				$match = self::matchSpamRegex( $this->sectiontitle );
+			} else {
+				# This branch is taken when the "Add Topic" user interface is used, or the API
+				# is used with the 'summary' parameter.
+				$match = self::matchSpamRegex( $this->summary );
+			}
+		}
+		if ( $match === false ) {
+			$match = self::matchSpamRegex( $this->textbox1 );
+		}
+		if ( $match !== false ) {
+			$result['spam'] = $match;
+			$ip = $request->getIP();
+			$pdbk = $this->mTitle->getPrefixedDBkey();
+			$match = str_replace( "\n", '', $match );
+			wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
+			$status->fatal( 'spamprotectionmatch', $match );
+			$status->value = self::AS_SPAM_ERROR;
+			return $status;
+		}
+		if ( !Hooks::run(
+			'EditFilter',
+			[ $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ] )
+		) {
+			# Error messages etc. could be handled within the hook...
+			$status->fatal( 'hookaborted' );
+			$status->value = self::AS_HOOK_ERROR;
+			return $status;
+		} elseif ( $this->hookError != '' ) {
+			# ...or the hook could be expecting us to produce an error
+			$status->fatal( 'hookaborted' );
+			$status->value = self::AS_HOOK_ERROR_EXPECTED;
+			return $status;
+		}
+
+		if ( $user->isBlockedFrom( $this->mTitle, false ) ) {
+			// Auto-block user's IP if the account was "hard" blocked
+			if ( !wfReadOnly() ) {
+				$user->spreadAnyEditBlock();
+			}
+			# Check block state against master, thus 'false'.
+			$status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
+			return $status;
+		}
+
+		$this->contentLength = strlen( $this->textbox1 );
+		$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 );
+			return $status;
+		}
+
+		if ( !$user->isAllowed( 'edit' ) ) {
+			if ( $user->isAnon() ) {
+				$status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
+				return $status;
+			} else {
+				$status->fatal( 'readonlytext' );
+				$status->value = self::AS_READ_ONLY_PAGE_LOGGED;
+				return $status;
+			}
+		}
+
+		$changingContentModel = false;
+		if ( $this->contentModel !== $this->mTitle->getContentModel() ) {
+			if ( !$config->get( 'ContentHandlerUseDB' ) ) {
+				$status->fatal( 'editpage-cannot-use-custom-model' );
+				$status->value = self::AS_CANNOT_USE_CUSTOM_MODEL;
+				return $status;
+			} elseif ( !$user->isAllowed( 'editcontentmodel' ) ) {
+				$status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
+				return $status;
+			}
+			// Make sure the user can edit the page under the new content model too
+			$titleWithNewContentModel = clone $this->mTitle;
+			$titleWithNewContentModel->setContentModel( $this->contentModel );
+			if ( !$titleWithNewContentModel->userCan( 'editcontentmodel', $user )
+				|| !$titleWithNewContentModel->userCan( 'edit', $user )
+			) {
+				$status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
+				return $status;
+			}
+
+			$changingContentModel = true;
+			$oldContentModel = $this->mTitle->getContentModel();
+		}
+
+		if ( $this->changeTags ) {
+			$changeTagsStatus = ChangeTags::canAddTagsAccompanyingChange(
+				$this->changeTags, $user );
+			if ( !$changeTagsStatus->isOK() ) {
+				$changeTagsStatus->value = self::AS_CHANGE_TAG_ERROR;
+				return $changeTagsStatus;
+			}
+		}
+
+		if ( wfReadOnly() ) {
+			$status->fatal( 'readonlytext' );
+			$status->value = self::AS_READ_ONLY_PAGE;
+			return $status;
+		}
+		if ( $user->pingLimiter() || $user->pingLimiter( 'linkpurge', 0 )
+			|| ( $changingContentModel && $user->pingLimiter( 'editcontentmodel' ) )
+		) {
+			$status->fatal( 'actionthrottledtext' );
+			$status->value = self::AS_RATE_LIMITED;
+			return $status;
+		}
+
+		# If the article has been deleted while editing, don't save it without
+		# confirmation
+		if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
+			$status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
+			return $status;
+		}
+
+		# Load the page data from the master. If anything changes in the meantime,
+		# we detect it by using page_latest like a token in a 1 try compare-and-swap.
+		$this->page->loadPageData( 'fromdbmaster' );
+		$new = !$this->page->exists();
+
+		if ( $new ) {
+			// Late check for create permission, just in case *PARANOIA*
+			if ( !$this->mTitle->userCan( 'create', $user ) ) {
+				$status->fatal( 'nocreatetext' );
+				$status->value = self::AS_NO_CREATE_PERMISSION;
+				wfDebug( __METHOD__ . ": no create permission\n" );
+				return $status;
+			}
+
+			// Don't save a new page if it's blank or if it's a MediaWiki:
+			// message with content equivalent to default (allow empty pages
+			// in this case to disable messages, see T52124)
+			$defaultMessageText = $this->mTitle->getDefaultMessageText();
+			if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
+				$defaultText = $defaultMessageText;
+			} else {
+				$defaultText = '';
+			}
+
+			if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
+				$this->blankArticle = true;
+				$status->fatal( 'blankarticle' );
+				$status->setResult( false, self::AS_BLANK_ARTICLE );
+				return $status;
+			}
+
+			if ( !$this->runPostMergeFilters( $textbox_content, $status, $user ) ) {
+				return $status;
+			}
+
+			$content = $textbox_content;
+
+			$result['sectionanchor'] = '';
+			if ( $this->section == 'new' ) {
+				if ( $this->sectiontitle !== '' ) {
+					// Insert the section title above the content.
+					$content = $content->addSectionHeader( $this->sectiontitle );
+				} elseif ( $this->summary !== '' ) {
+					// Insert the section title above the content.
+					$content = $content->addSectionHeader( $this->summary );
+				}
+				$this->summary = $this->newSectionSummary( $result['sectionanchor'] );
+			}
+
+			$status->value = self::AS_SUCCESS_NEW_ARTICLE;
+
+		} else { # not $new
+
+			# Article exists. Check for edit conflict.
+
+			$this->page->clear(); # Force reload of dates, etc.
+			$timestamp = $this->page->getTimestamp();
+			$latest = $this->page->getLatest();
+
+			wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
+
+			// Check editRevId if set, which handles same-second timestamp collisions
+			if ( $timestamp != $this->edittime
+				|| ( $this->editRevId !== null && $this->editRevId != $latest )
+			) {
+				$this->isConflict = true;
+				if ( $this->section == 'new' ) {
+					if ( $this->page->getUserText() == $user->getName() &&
+						$this->page->getComment() == $this->newSectionSummary()
+					) {
+						// Probably a duplicate submission of a new comment.
+						// This can happen when CDN resends a request after
+						// a timeout but the first one actually went through.
+						wfDebug( __METHOD__
+							. ": duplicate new section submission; trigger edit conflict!\n" );
+					} else {
+						// New comment; suppress conflict.
+						$this->isConflict = false;
+						wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
+					}
+				} elseif ( $this->section == ''
+					&& Revision::userWasLastToEdit(
+						DB_MASTER, $this->mTitle->getArticleID(),
+						$user->getId(), $this->edittime
+					)
+				) {
+					# Suppress edit conflict with self, except for section edits where merging is required.
+					wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
+					$this->isConflict = false;
+				}
+			}
+
+			// If sectiontitle is set, use it, otherwise use the summary as the section title.
+			if ( $this->sectiontitle !== '' ) {
+				$sectionTitle = $this->sectiontitle;
+			} else {
+				$sectionTitle = $this->summary;
+			}
+
+			$content = null;
+
+			if ( $this->isConflict ) {
+				wfDebug( __METHOD__
+					. ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
+					. " (id '{$this->editRevId}') (article time '{$timestamp}')\n" );
+				// @TODO: replaceSectionAtRev() with base ID (not prior current) for ?oldid=X case
+				// ...or disable section editing for non-current revisions (not exposed anyway).
+				if ( $this->editRevId !== null ) {
+					$content = $this->page->replaceSectionAtRev(
+						$this->section,
+						$textbox_content,
+						$sectionTitle,
+						$this->editRevId
+					);
+				} else {
+					$content = $this->page->replaceSectionContent(
+						$this->section,
+						$textbox_content,
+						$sectionTitle,
+						$this->edittime
+					);
+				}
+			} else {
+				wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
+				$content = $this->page->replaceSectionContent(
+					$this->section,
+					$textbox_content,
+					$sectionTitle
+				);
+			}
+
+			if ( is_null( $content ) ) {
+				wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
+				$this->isConflict = true;
+				$content = $textbox_content; // do not try to merge here!
+			} elseif ( $this->isConflict ) {
+				# Attempt merge
+				if ( $this->mergeChangesIntoContent( $content ) ) {
+					// Successful merge! Maybe we should tell the user the good news?
+					$this->isConflict = false;
+					wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
+				} else {
+					$this->section = '';
+					$this->textbox1 = ContentHandler::getContentText( $content );
+					wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
+				}
+			}
+
+			if ( $this->isConflict ) {
+				$status->setResult( false, self::AS_CONFLICT_DETECTED );
+				return $status;
+			}
+
+			if ( !$this->runPostMergeFilters( $content, $status, $user ) ) {
+				return $status;
+			}
+
+			if ( $this->section == 'new' ) {
+				// Handle the user preference to force summaries here
+				if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
+					$this->missingSummary = true;
+					$status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
+					$status->value = self::AS_SUMMARY_NEEDED;
+					return $status;
+				}
+
+				// Do not allow the user to post an empty comment
+				if ( $this->textbox1 == '' ) {
+					$this->missingComment = true;
+					$status->fatal( 'missingcommenttext' );
+					$status->value = self::AS_TEXTBOX_EMPTY;
+					return $status;
+				}
+			} elseif ( !$this->allowBlankSummary
+				&& !$content->equals( $this->getOriginalContent( $user ) )
+				&& !$content->isRedirect()
+				&& md5( $this->summary ) == $this->autoSumm
+			) {
+				$this->missingSummary = true;
+				$status->fatal( 'missingsummary' );
+				$status->value = self::AS_SUMMARY_NEEDED;
+				return $status;
+			}
+
+			# All's well
+			$sectionanchor = '';
+			if ( $this->section == 'new' ) {
+				$this->summary = $this->newSectionSummary( $sectionanchor );
+			} elseif ( $this->section != '' ) {
+				# Try to get a section anchor from the section source, redirect
+				# to edited section if header found.
+				# XXX: Might be better to integrate this into Article::replaceSectionAtRev
+				# for duplicate heading checking and maybe parsing.
+				$hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
+				# We can't deal with anchors, includes, html etc in the header for now,
+				# headline would need to be parsed to improve this.
+				if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
+					$sectionanchor = $this->guessSectionName( $matches[2] );
+				}
+			}
+			$result['sectionanchor'] = $sectionanchor;
+
+			// Save errors may fall down to the edit form, but we've now
+			// merged the section into full text. Clear the section field
+			// so that later submission of conflict forms won't try to
+			// replace that into a duplicated mess.
+			$this->textbox1 = $this->toEditText( $content );
+			$this->section = '';
+
+			$status->value = self::AS_SUCCESS_UPDATE;
+		}
+
+		if ( !$this->allowSelfRedirect
+			&& $content->isRedirect()
+			&& $content->getRedirectTarget()->equals( $this->getTitle() )
+		) {
+			// If the page already redirects to itself, don't warn.
+			$currentTarget = $this->getCurrentContent()->getRedirectTarget();
+			if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
+				$this->selfRedirect = true;
+				$status->fatal( 'selfredirect' );
+				$status->value = self::AS_SELF_REDIRECT;
+				return $status;
+			}
+		}
+
+		// Check for length errors again now that the section is merged in
+		$this->contentLength = strlen( $this->toEditText( $content ) );
+		if ( $this->contentLength > $maxArticleSize * 1024 ) {
+			$this->tooBig = true;
+			$status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
+			return $status;
+		}
+
+		$flags = EDIT_AUTOSUMMARY |
+			( $new ? EDIT_NEW : EDIT_UPDATE ) |
+			( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
+			( $bot ? EDIT_FORCE_BOT : 0 );
+
+		$doEditStatus = $this->page->doEditContent(
+			$content,
+			$this->summary,
+			$flags,
+			false,
+			$user,
+			$content->getDefaultFormat(),
+			$this->changeTags,
+			$this->undidRev
+		);
+
+		if ( !$doEditStatus->isOK() ) {
+			// Failure from doEdit()
+			// Show the edit conflict page for certain recognized errors from doEdit(),
+			// but don't show it for errors from extension hooks
+			$errors = $doEditStatus->getErrorsArray();
+			if ( in_array( $errors[0][0],
+					[ 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ] )
+			) {
+				$this->isConflict = true;
+				// Destroys data doEdit() put in $status->value but who cares
+				$doEditStatus->value = self::AS_END;
+			}
+			return $doEditStatus;
+		}
+
+		$result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
+		if ( $result['nullEdit'] ) {
+			// We don't know if it was a null edit until now, so increment here
+			$user->pingLimiter( 'linkpurge' );
+		}
+		$result['redirect'] = $content->isRedirect();
+
+		$this->updateWatchlist();
+
+		// If the content model changed, add a log entry
+		if ( $changingContentModel ) {
+			$this->addContentModelChangeLogEntry(
+				$user,
+				$new ? false : $oldContentModel,
+				$this->contentModel,
+				$this->summary
+			);
+		}
+
+		return $status;
+	}
+
+	/**
+	 * @param User $user
+	 * @param string|false $oldModel false if the page is being newly created
+	 * @param string $newModel
+	 * @param string $reason
+	 */
+	protected function addContentModelChangeLogEntry( User $user, $oldModel, $newModel, $reason ) {
+		$new = $oldModel === false;
+		$log = new ManualLogEntry( 'contentmodel', $new ? 'new' : 'change' );
+		$log->setPerformer( $user );
+		$log->setTarget( $this->mTitle );
+		$log->setComment( $reason );
+		$log->setParameters( [
+			'4::oldmodel' => $oldModel,
+			'5::newmodel' => $newModel
+		] );
+		$logid = $log->insert();
+		$log->publish( $logid );
+	}
+
+	/**
+	 * Register the change of watch status
+	 */
+	protected function updateWatchlist() {
+		$user = $this->context->getUser();
+		if ( !$user->isLoggedIn() ) {
+			return;
+		}
+
+		$title = $this->mTitle;
+		$watch = $this->watchthis;
+		// Do this in its own transaction to reduce contention...
+		DeferredUpdates::addCallableUpdate( function () use ( $user, $title, $watch ) {
+			if ( $watch == $user->isWatched( $title, User::IGNORE_USER_RIGHTS ) ) {
+				return; // nothing to change
+			}
+			WatchAction::doWatchOrUnwatch( $watch, $title, $user );
+		} );
+	}
+
+	/**
+	 * Attempts to do 3-way merge of edit content with a base revision
+	 * and current content, in case of edit conflict, in whichever way appropriate
+	 * for the content type.
+	 *
+	 * @since 1.21
+	 *
+	 * @param Content $editContent
+	 *
+	 * @return bool
+	 */
+	private function mergeChangesIntoContent( &$editContent ) {
+		$db = wfGetDB( DB_MASTER );
+
+		// This is the revision the editor started from
+		$baseRevision = $this->getBaseRevision();
+		$baseContent = $baseRevision ? $baseRevision->getContent() : null;
+
+		if ( is_null( $baseContent ) ) {
+			return false;
+		}
+
+		// The current state, we want to merge updates into it
+		$currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
+		$currentContent = $currentRevision ? $currentRevision->getContent() : null;
+
+		if ( is_null( $currentContent ) ) {
+			return false;
+		}
+
+		$handler = ContentHandler::getForModelID( $baseContent->getModel() );
+
+		$result = $handler->merge3( $baseContent, $editContent, $currentContent );
+
+		if ( $result ) {
+			$editContent = $result;
+			// Update parentRevId to what we just merged.
+			$this->parentRevId = $currentRevision->getId();
+			return true;
+		}
+
+		return false;
+	}
+
+	/**
+	 * @note: this method is very poorly named. If the user opened the form with ?oldid=X,
+	 *        one might think of X as the "base revision", which is NOT what this returns.
+	 * @return Revision|null Current version when the edit was started
+	 */
+	public function getBaseRevision() {
+		if ( !$this->mBaseRevision ) {
+			$db = wfGetDB( DB_MASTER );
+			$this->mBaseRevision = $this->editRevId
+				? Revision::newFromId( $this->editRevId, Revision::READ_LATEST )
+				: Revision::loadFromTimestamp( $db, $this->mTitle, $this->edittime );
+		}
+		return $this->mBaseRevision;
+	}
+
+	/**
+	 * Check given input text against $wgSpamRegex, and return the text of the first match.
+	 *
+	 * @param string $text
+	 *
+	 * @return string|bool Matching string or false
+	 */
+	public static function matchSpamRegex( $text ) {
+		global $wgSpamRegex;
+		// For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
+		$regexes = (array)$wgSpamRegex;
+		return self::matchSpamRegexInternal( $text, $regexes );
+	}
+
+	/**
+	 * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
+	 *
+	 * @param string $text
+	 *
+	 * @return string|bool Matching string or false
+	 */
+	public static function matchSummarySpamRegex( $text ) {
+		global $wgSummarySpamRegex;
+		$regexes = (array)$wgSummarySpamRegex;
+		return self::matchSpamRegexInternal( $text, $regexes );
+	}
+
+	/**
+	 * @param string $text
+	 * @param array $regexes
+	 * @return bool|string
+	 */
+	protected static function matchSpamRegexInternal( $text, $regexes ) {
+		foreach ( $regexes as $regex ) {
+			$matches = [];
+			if ( preg_match( $regex, $text, $matches ) ) {
+				return $matches[0];
+			}
+		}
+		return false;
+	}
+
+	public function setHeaders() {
+		$out = $this->context->getOutput();
+
+		$out->addModules( 'mediawiki.action.edit' );
+		$out->addModuleStyles( 'mediawiki.action.edit.styles' );
+		$out->addModuleStyles( 'mediawiki.editfont.styles' );
+
+		$user = $this->context->getUser();
+		if ( $user->getOption( 'showtoolbar' ) ) {
+			// The addition of default buttons is handled by getEditToolbar() which
+			// has its own dependency on this module. The call here ensures the module
+			// is loaded in time (it has position "top") for other modules to register
+			// buttons (e.g. extensions, gadgets, user scripts).
+			$out->addModules( 'mediawiki.toolbar' );
+		}
+
+		if ( $user->getOption( 'uselivepreview' ) ) {
+			$out->addModules( 'mediawiki.action.edit.preview' );
+		}
+
+		if ( $user->getOption( 'useeditwarning' ) ) {
+			$out->addModules( 'mediawiki.action.edit.editWarning' );
+		}
+
+		# Enabled article-related sidebar, toplinks, etc.
+		$out->setArticleRelated( true );
+
+		$contextTitle = $this->getContextTitle();
+		if ( $this->isConflict ) {
+			$msg = 'editconflict';
+		} elseif ( $contextTitle->exists() && $this->section != '' ) {
+			$msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
+		} else {
+			$msg = $contextTitle->exists()
+				|| ( $contextTitle->getNamespace() == NS_MEDIAWIKI
+					&& $contextTitle->getDefaultMessageText() !== false
+				)
+				? 'editing'
+				: 'creating';
+		}
+
+		# Use the title defined by DISPLAYTITLE magic word when present
+		# NOTE: getDisplayTitle() returns HTML while getPrefixedText() returns plain text.
+		#       setPageTitle() treats the input as wikitext, which should be safe in either case.
+		$displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
+		if ( $displayTitle === false ) {
+			$displayTitle = $contextTitle->getPrefixedText();
+		}
+		$out->setPageTitle( $this->context->msg( $msg, $displayTitle ) );
+
+		$config = $this->context->getConfig();
+
+		# Transmit the name of the message to JavaScript for live preview
+		# Keep Resources.php/mediawiki.action.edit.preview in sync with the possible keys
+		$out->addJsConfigVars( [
+			'wgEditMessage' => $msg,
+			'wgAjaxEditStash' => $config->get( 'AjaxEditStash' ),
+		] );
+
+		// Add whether to use 'save' or 'publish' messages to JavaScript for post-edit, other
+		// editors, etc.
+		$out->addJsConfigVars(
+			'wgEditSubmitButtonLabelPublish',
+			$config->get( 'EditSubmitButtonLabelPublish' )
+		);
+	}
+
+	/**
+	 * Show all applicable editing introductions
+	 */
+	protected function showIntro() {
+		if ( $this->suppressIntro ) {
+			return;
+		}
+
+		$out = $this->context->getOutput();
+		$namespace = $this->mTitle->getNamespace();
+
+		if ( $namespace == NS_MEDIAWIKI ) {
+			# Show a warning if editing an interface message
+			$out->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
+			# If this is a default message (but not css, json, or js),
+			# show a hint that it is translatable on translatewiki.net
+			if (
+				!$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
+				&& !$this->mTitle->hasContentModel( CONTENT_MODEL_JSON )
+				&& !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
+			) {
+				$defaultMessageText = $this->mTitle->getDefaultMessageText();
+				if ( $defaultMessageText !== false ) {
+					$out->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
+						'translateinterface' );
+				}
+			}
+		} elseif ( $namespace == NS_FILE ) {
+			# Show a hint to shared repo
+			$file = wfFindFile( $this->mTitle );
+			if ( $file && !$file->isLocal() ) {
+				$descUrl = $file->getDescriptionUrl();
+				# there must be a description url to show a hint to shared repo
+				if ( $descUrl ) {
+					if ( !$this->mTitle->exists() ) {
+						$out->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", [
+									'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
+						] );
+					} else {
+						$out->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", [
+									'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
+						] );
+					}
+				}
+			}
+		}
+
+		# Show a warning message when someone creates/edits a user (talk) page but the user does not exist
+		# Show log extract when the user is currently blocked
+		if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
+			$username = explode( '/', $this->mTitle->getText(), 2 )[0];
+			$user = User::newFromName( $username, false /* allow IP users */ );
+			$ip = User::isIP( $username );
+			$block = Block::newFromTarget( $user, $user );
+			if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
+				$out->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
+					[ 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ] );
+			} elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
+				# Show log extract if the user is currently blocked
+				LogEventsList::showLogExtract(
+					$out,
+					'block',
+					MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
+					'',
+					[
+						'lim' => 1,
+						'showIfEmpty' => false,
+						'msgKey' => [
+							'blocked-notice-logextract',
+							$user->getName() # Support GENDER in notice
+						]
+					]
+				);
+			}
+		}
+		# Try to add a custom edit intro, or use the standard one if this is not possible.
+		if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
+			$helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
+				$this->context->msg( 'helppage' )->inContentLanguage()->text()
+			) );
+			if ( $this->context->getUser()->isLoggedIn() ) {
+				$out->wrapWikiMsg(
+					// Suppress the external link icon, consider the help url an internal one
+					"<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
+					[
+						'newarticletext',
+						$helpLink
+					]
+				);
+			} else {
+				$out->wrapWikiMsg(
+					// Suppress the external link icon, consider the help url an internal one
+					"<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
+					[
+						'newarticletextanon',
+						$helpLink
+					]
+				);
+			}
+		}
+		# Give a notice if the user is editing a deleted/moved page...
+		if ( !$this->mTitle->exists() ) {
+			$dbr = wfGetDB( DB_REPLICA );
+
+			LogEventsList::showLogExtract( $out, [ 'delete', 'move' ], $this->mTitle,
+				'',
+				[
+					'lim' => 10,
+					'conds' => [ 'log_action != ' . $dbr->addQuotes( 'revision' ) ],
+					'showIfEmpty' => false,
+					'msgKey' => [ 'recreate-moveddeleted-warn' ]
+				]
+			);
+		}
+	}
+
+	/**
+	 * Attempt to show a custom editing introduction, if supplied
+	 *
+	 * @return bool
+	 */
+	protected function showCustomIntro() {
+		if ( $this->editintro ) {
+			$title = Title::newFromText( $this->editintro );
+			if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
+				// Added using template syntax, to take <noinclude>'s into account.
+				$this->context->getOutput()->addWikiTextTitleTidy(
+					'<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
+					$this->mTitle
+				);
+				return true;
+			}
+		}
+		return false;
+	}
+
+	/**
+	 * Gets an editable textual representation of $content.
+	 * The textual representation can be turned by into a Content object by the
+	 * toEditContent() method.
+	 *
+	 * If $content is null or false or a string, $content is returned unchanged.
+	 *
+	 * If the given Content object is not of a type that can be edited using
+	 * the text base EditPage, an exception will be raised. Set
+	 * $this->allowNonTextContent to true to allow editing of non-textual
+	 * content.
+	 *
+	 * @param Content|null|bool|string $content
+	 * @return string The editable text form of the content.
+	 *
+	 * @throws MWException If $content is not an instance of TextContent and
+	 *   $this->allowNonTextContent is not true.
+	 */
+	protected function toEditText( $content ) {
+		if ( $content === null || $content === false || is_string( $content ) ) {
+			return $content;
+		}
+
+		if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
+			throw new MWException( 'This content model is not supported: ' . $content->getModel() );
+		}
+
+		return $content->serialize( $this->contentFormat );
+	}
+
+	/**
+	 * Turns the given text into a Content object by unserializing it.
+	 *
+	 * If the resulting Content object is not of a type that can be edited using
+	 * the text base EditPage, an exception will be raised. Set
+	 * $this->allowNonTextContent to true to allow editing of non-textual
+	 * content.
+	 *
+	 * @param string|null|bool $text Text to unserialize
+	 * @return Content|bool|null The content object created from $text. If $text was false
+	 *   or null, false resp. null will be  returned instead.
+	 *
+	 * @throws MWException If unserializing the text results in a Content
+	 *   object that is not an instance of TextContent and
+	 *   $this->allowNonTextContent is not true.
+	 */
+	protected function toEditContent( $text ) {
+		if ( $text === false || $text === null ) {
+			return $text;
+		}
+
+		$content = ContentHandler::makeContent( $text, $this->getTitle(),
+			$this->contentModel, $this->contentFormat );
+
+		if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
+			throw new MWException( 'This content model is not supported: ' . $content->getModel() );
+		}
+
+		return $content;
+	}
+
+	/**
+	 * Send the edit form and related headers to OutputPage
+	 * @param callable|null $formCallback That takes an OutputPage parameter; will be called
+	 *     during form output near the top, for captchas and the like.
+	 *
+	 * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
+	 * use the EditPage::showEditForm:fields hook instead.
+	 */
+	public function showEditForm( $formCallback = null ) {
+		# need to parse the preview early so that we know which templates are used,
+		# otherwise users with "show preview after edit box" will get a blank list
+		# we parse this near the beginning so that setHeaders can do the title
+		# setting work instead of leaving it in getPreviewText
+		$previewOutput = '';
+		if ( $this->formtype == 'preview' ) {
+			$previewOutput = $this->getPreviewText();
+		}
+
+		$out = $this->context->getOutput();
+
+		// Avoid PHP 7.1 warning of passing $this by reference
+		$editPage = $this;
+		Hooks::run( 'EditPage::showEditForm:initial', [ &$editPage, &$out ] );
+
+		$this->setHeaders();
+
+		$this->addTalkPageText();
+		$this->addEditNotices();
+
+		if ( !$this->isConflict &&
+			$this->section != '' &&
+			!$this->isSectionEditSupported() ) {
+			// We use $this->section to much before this and getVal('wgSection') directly in other places
+			// at this point we can't reset $this->section to '' to fallback to non-section editing.
+			// Someone is welcome to try refactoring though
+			$out->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
+			return;
+		}
+
+		$this->showHeader();
+
+		$out->addHTML( $this->editFormPageTop );
+
+		$user = $this->context->getUser();
+		if ( $user->getOption( 'previewontop' ) ) {
+			$this->displayPreviewArea( $previewOutput, true );
+		}
+
+		$out->addHTML( $this->editFormTextTop );
+
+		$showToolbar = true;
+		if ( $this->wasDeletedSinceLastEdit() ) {
+			if ( $this->formtype == 'save' ) {
+				// Hide the toolbar and edit area, user can click preview to get it back
+				// Add an confirmation checkbox and explanation.
+				$showToolbar = false;
+			} else {
+				$out->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
+					'deletedwhileediting' );
+			}
+		}
+
+		// @todo add EditForm plugin interface and use it here!
+		//       search for textarea1 and textarea2, and allow EditForm to override all uses.
+		$out->addHTML( Html::openElement(
+			'form',
+			[
+				'class' => 'mw-editform',
+				'id' => self::EDITFORM_ID,
+				'name' => self::EDITFORM_ID,
+				'method' => 'post',
+				'action' => $this->getActionURL( $this->getContextTitle() ),
+				'enctype' => 'multipart/form-data'
+			]
+		) );
+
+		if ( is_callable( $formCallback ) ) {
+			wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
+			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;' ] )
+			. Html::rawElement(
+				'label',
+				[ 'for' => 'wpAntispam' ],
+				$this->context->msg( 'simpleantispam-label' )->parse()
+			)
+			. Xml::element(
+				'input',
+				[
+					'type' => 'text',
+					'name' => 'wpAntispam',
+					'id' => 'wpAntispam',
+					'value' => ''
+				]
+			)
+			. Xml::closeElement( 'div' )
+		);
+
+		// Avoid PHP 7.1 warning of passing $this by reference
+		$editPage = $this;
+		Hooks::run( 'EditPage::showEditForm:fields', [ &$editPage, &$out ] );
+
+		// Put these up at the top to ensure they aren't lost on early form submission
+		$this->showFormBeforeText();
+
+		if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
+			$username = $this->lastDelete->user_name;
+			$comment = CommentStore::getStore()
+				->getComment( 'log_comment', $this->lastDelete )->text;
+
+			// It is better to not parse the comment at all than to have templates expanded in the middle
+			// TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
+			$key = $comment === ''
+				? 'confirmrecreate-noreason'
+				: 'confirmrecreate';
+			$out->addHTML(
+				'<div class="mw-confirm-recreate">' .
+					$this->context->msg( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
+				Xml::checkLabel( $this->context->msg( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
+					[ 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' ]
+				) .
+				'</div>'
+			);
+		}
+
+		# When the summary is hidden, also hide them on preview/show changes
+		if ( $this->nosummary ) {
+			$out->addHTML( Html::hidden( 'nosummary', true ) );
+		}
+
+		# If a blank edit summary was previously provided, and the appropriate
+		# user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
+		# user being bounced back more than once in the event that a summary
+		# is not required.
+		# ####
+		# For a bit more sophisticated detection of blank summaries, hash the
+		# automatic one and pass that in the hidden field wpAutoSummary.
+		if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
+			$out->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
+		}
+
+		if ( $this->undidRev ) {
+			$out->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
+		}
+
+		if ( $this->selfRedirect ) {
+			$out->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
+		}
+
+		if ( $this->hasPresetSummary ) {
+			// If a summary has been preset using &summary= we don't want to prompt for
+			// a different summary. Only prompt for a summary if the summary is blanked.
+			// (T19416)
+			$this->autoSumm = md5( '' );
+		}
+
+		$autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
+		$out->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
+
+		$out->addHTML( Html::hidden( 'oldid', $this->oldid ) );
+		$out->addHTML( Html::hidden( 'parentRevId', $this->getParentRevId() ) );
+
+		$out->addHTML( Html::hidden( 'format', $this->contentFormat ) );
+		$out->addHTML( Html::hidden( 'model', $this->contentModel ) );
+
+		$out->enableOOUI();
+
+		if ( $this->section == 'new' ) {
+			$this->showSummaryInput( true, $this->summary );
+			$out->addHTML( $this->getSummaryPreview( true, $this->summary ) );
+		}
+
+		$out->addHTML( $this->editFormTextBeforeContent );
+		if ( $this->isConflict ) {
+			// In an edit conflict, we turn textbox2 into the user's text,
+			// and textbox1 into the stored version
+			$this->textbox2 = $this->textbox1;
+
+			$content = $this->getCurrentContent();
+			$this->textbox1 = $this->toEditText( $content );
+
+			$editConflictHelper = $this->getEditConflictHelper();
+			$editConflictHelper->setTextboxes( $this->textbox2, $this->textbox1 );
+			$editConflictHelper->setContentModel( $this->contentModel );
+			$editConflictHelper->setContentFormat( $this->contentFormat );
+			$out->addHTML( $editConflictHelper->getEditFormHtmlBeforeContent() );
+		}
+
+		if ( !$this->mTitle->isUserConfigPage() && $showToolbar && $user->getOption( 'showtoolbar' ) ) {
+			$out->addHTML( self::getEditToolbar( $this->mTitle ) );
+		}
+
+		if ( $this->blankArticle ) {
+			$out->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
+		}
+
+		if ( $this->isConflict ) {
+			// In an edit conflict bypass the overridable content form method
+			// and fallback to the raw wpTextbox1 since editconflicts can't be
+			// resolved between page source edits and custom ui edits using the
+			// custom edit ui.
+			$conflictTextBoxAttribs = [];
+			if ( $this->wasDeletedSinceLastEdit() ) {
+				$conflictTextBoxAttribs['style'] = 'display:none;';
+			} elseif ( $this->isOldRev ) {
+				$conflictTextBoxAttribs['class'] = 'mw-textarea-oldrev';
+			}
+
+			$out->addHTML( $editConflictHelper->getEditConflictMainTextBox( $conflictTextBoxAttribs ) );
+			$out->addHTML( $editConflictHelper->getEditFormHtmlAfterContent() );
+		} else {
+			$this->showContentForm();
+		}
+
+		$out->addHTML( $this->editFormTextAfterContent );
+
+		$this->showStandardInputs();
+
+		$this->showFormAfterText();
+
+		$this->showTosSummary();
+
+		$this->showEditTools();
+
+		$out->addHTML( $this->editFormTextAfterTools . "\n" );
+
+		$out->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
+
+		$out->addHTML( Html::rawElement( 'div', [ 'class' => 'hiddencats' ],
+			Linker::formatHiddenCategories( $this->page->getHiddenCategories() ) ) );
+
+		$out->addHTML( Html::rawElement( 'div', [ 'class' => 'limitreport' ],
+			self::getPreviewLimitReport( $this->mParserOutput ) ) );
+
+		$out->addModules( 'mediawiki.action.edit.collapsibleFooter' );
+
+		if ( $this->isConflict ) {
+			try {
+				$this->showConflict();
+			} catch ( MWContentSerializationException $ex ) {
+				// this can't really happen, but be nice if it does.
+				$msg = $this->context->msg(
+					'content-failed-to-parse',
+					$this->contentModel,
+					$this->contentFormat,
+					$ex->getMessage()
+				);
+				$out->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
+			}
+		}
+
+		// Set a hidden field so JS knows what edit form mode we are in
+		if ( $this->isConflict ) {
+			$mode = 'conflict';
+		} elseif ( $this->preview ) {
+			$mode = 'preview';
+		} elseif ( $this->diff ) {
+			$mode = 'diff';
+		} else {
+			$mode = 'text';
+		}
+		$out->addHTML( Html::hidden( 'mode', $mode, [ 'id' => 'mw-edit-mode' ] ) );
+
+		// Marker for detecting truncated form data.  This must be the last
+		// parameter sent in order to be of use, so do not move me.
+		$out->addHTML( Html::hidden( 'wpUltimateParam', true ) );
+		$out->addHTML( $this->editFormTextBottom . "\n</form>\n" );
+
+		if ( !$user->getOption( 'previewontop' ) ) {
+			$this->displayPreviewArea( $previewOutput, false );
+		}
+	}
+
+	/**
+	 * Wrapper around TemplatesOnThisPageFormatter to make
+	 * a "templates on this page" list.
+	 *
+	 * @param Title[] $templates
+	 * @return string HTML
+	 */
+	public function makeTemplatesOnThisPageList( array $templates ) {
+		$templateListFormatter = new TemplatesOnThisPageFormatter(
+			$this->context, MediaWikiServices::getInstance()->getLinkRenderer()
+		);
+
+		// preview if preview, else section if section, else false
+		$type = false;
+		if ( $this->preview ) {
+			$type = 'preview';
+		} elseif ( $this->section != '' ) {
+			$type = 'section';
+		}
+
+		return Html::rawElement( 'div', [ 'class' => 'templatesUsed' ],
+			$templateListFormatter->format( $templates, $type )
+		);
+	}
+
+	/**
+	 * Extract the section title from current section text, if any.
+	 *
+	 * @param string $text
+	 * @return string|bool String or false
+	 */
+	public static function extractSectionTitle( $text ) {
+		preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
+		if ( !empty( $matches[2] ) ) {
+			global $wgParser;
+			return $wgParser->stripSectionName( trim( $matches[2] ) );
+		} else {
+			return false;
+		}
+	}
+
+	protected function showHeader() {
+		$out = $this->context->getOutput();
+		$user = $this->context->getUser();
+		if ( $this->isConflict ) {
+			$this->addExplainConflictHeader( $out );
+			$this->editRevId = $this->page->getLatest();
+		} else {
+			if ( $this->section != '' && $this->section != 'new' ) {
+				if ( !$this->summary && !$this->preview && !$this->diff ) {
+					$sectionTitle = self::extractSectionTitle( $this->textbox1 ); // FIXME: use Content object
+					if ( $sectionTitle !== false ) {
+						$this->summary = "/* $sectionTitle */ ";
+					}
+				}
+			}
+
+			$buttonLabel = $this->context->msg( $this->getSubmitButtonLabel() )->text();
+
+			if ( $this->missingComment ) {
+				$out->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
+			}
+
+			if ( $this->missingSummary && $this->section != 'new' ) {
+				$out->wrapWikiMsg(
+					"<div id='mw-missingsummary'>\n$1\n</div>",
+					[ 'missingsummary', $buttonLabel ]
+				);
+			}
+
+			if ( $this->missingSummary && $this->section == 'new' ) {
+				$out->wrapWikiMsg(
+					"<div id='mw-missingcommentheader'>\n$1\n</div>",
+					[ 'missingcommentheader', $buttonLabel ]
+				);
+			}
+
+			if ( $this->blankArticle ) {
+				$out->wrapWikiMsg(
+					"<div id='mw-blankarticle'>\n$1\n</div>",
+					[ 'blankarticle', $buttonLabel ]
+				);
+			}
+
+			if ( $this->selfRedirect ) {
+				$out->wrapWikiMsg(
+					"<div id='mw-selfredirect'>\n$1\n</div>",
+					[ 'selfredirect', $buttonLabel ]
+				);
+			}
+
+			if ( $this->hookError !== '' ) {
+				$out->addWikiText( $this->hookError );
+			}
+
+			if ( $this->section != 'new' ) {
+				$revision = $this->mArticle->getRevisionFetched();
+				if ( $revision ) {
+					// Let sysop know that this will make private content public if saved
+
+					if ( !$revision->userCan( Revision::DELETED_TEXT, $user ) ) {
+						$out->wrapWikiMsg(
+							"<div class='mw-warning plainlinks'>\n$1\n</div>\n",
+							'rev-deleted-text-permission'
+						);
+					} elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
+						$out->wrapWikiMsg(
+							"<div class='mw-warning plainlinks'>\n$1\n</div>\n",
+							'rev-deleted-text-view'
+						);
+					}
+
+					if ( !$revision->isCurrent() ) {
+						$this->mArticle->setOldSubtitle( $revision->getId() );
+						$out->addWikiMsg( 'editingold' );
+						$this->isOldRev = true;
+					}
+				} elseif ( $this->mTitle->exists() ) {
+					// Something went wrong
+
+					$out->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
+						[ 'missing-revision', $this->oldid ] );
+				}
+			}
+		}
+
+		if ( wfReadOnly() ) {
+			$out->wrapWikiMsg(
+				"<div id=\"mw-read-only-warning\">\n$1\n</div>",
+				[ 'readonlywarning', wfReadOnlyReason() ]
+			);
+		} elseif ( $user->isAnon() ) {
+			if ( $this->formtype != 'preview' ) {
+				$out->wrapWikiMsg(
+					"<div id='mw-anon-edit-warning' class='warningbox'>\n$1\n</div>",
+					[ 'anoneditwarning',
+						// Log-in link
+						SpecialPage::getTitleFor( 'Userlogin' )->getFullURL( [
+							'returnto' => $this->getTitle()->getPrefixedDBkey()
+						] ),
+						// Sign-up link
+						SpecialPage::getTitleFor( 'CreateAccount' )->getFullURL( [
+							'returnto' => $this->getTitle()->getPrefixedDBkey()
+						] )
+					]
+				);
+			} else {
+				$out->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\" class=\"warningbox\">\n$1</div>",
+					'anonpreviewwarning'
+				);
+			}
+		} else {
+			if ( $this->mTitle->isUserConfigPage() ) {
+				# Check the skin exists
+				if ( $this->isWrongCaseUserConfigPage() ) {
+					$out->wrapWikiMsg(
+						"<div class='error' id='mw-userinvalidconfigtitle'>\n$1\n</div>",
+						[ 'userinvalidconfigtitle', $this->mTitle->getSkinFromConfigSubpage() ]
+					);
+				}
+				if ( $this->getTitle()->isSubpageOf( $user->getUserPage() ) ) {
+					$isUserCssConfig = $this->mTitle->isUserCssConfigPage();
+					$isUserJsonConfig = $this->mTitle->isUserJsonConfigPage();
+					$isUserJsConfig = $this->mTitle->isUserJsConfigPage();
+
+					$warning = $isUserCssConfig
+						? 'usercssispublic'
+						: ( $isUserJsonConfig ? 'userjsonispublic' : 'userjsispublic' );
+
+					$out->wrapWikiMsg( '<div class="mw-userconfigpublic">$1</div>', $warning );
+
+					if ( $this->formtype !== 'preview' ) {
+						$config = $this->context->getConfig();
+						if ( $isUserCssConfig && $config->get( 'AllowUserCss' ) ) {
+							$out->wrapWikiMsg(
+								"<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
+								[ 'usercssyoucanpreview' ]
+							);
+						} elseif ( $isUserJsonConfig /* No comparable 'AllowUserJson' */ ) {
+							$out->wrapWikiMsg(
+								"<div id='mw-userjsonyoucanpreview'>\n$1\n</div>",
+								[ 'userjsonyoucanpreview' ]
+							);
+						} elseif ( $isUserJsConfig && $config->get( 'AllowUserJs' ) ) {
+							$out->wrapWikiMsg(
+								"<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
+								[ 'userjsyoucanpreview' ]
+							);
+						}
+					}
+				}
+			}
+		}
+
+		$this->addPageProtectionWarningHeaders();
+
+		$this->addLongPageWarningHeader();
+
+		# Add header copyright warning
+		$this->showHeaderCopyrightWarning();
+	}
+
+	/**
+	 * Helper function for summary input functions, which returns the neccessary
+	 * attributes for the input.
+	 *
+	 * @param array|null $inputAttrs Array of attrs to use on the input
+	 * @return array
+	 */
+	private function getSummaryInputAttributes( array $inputAttrs = null ) {
+		$conf = $this->context->getConfig();
+		$oldCommentSchema = $conf->get( 'CommentTableSchemaMigrationStage' ) === MIGRATION_OLD;
+		// HTML maxlength uses "UTF-16 code units", which means that characters outside BMP
+		// (e.g. emojis) count for two each. This limit is overridden in JS to instead count
+		// Unicode codepoints (or 255 UTF-8 bytes for old schema).
+		return ( is_array( $inputAttrs ) ? $inputAttrs : [] ) + [
+			'id' => 'wpSummary',
+			'name' => 'wpSummary',
+			'maxlength' => $oldCommentSchema ? 200 : CommentStore::COMMENT_CHARACTER_LIMIT,
+			'tabindex' => 1,
+			'size' => 60,
+			'spellcheck' => 'true',
+		];
+	}
+
+	/**
+	 * Builds a standard summary input with a label.
+	 *
+	 * @param string $summary The value of the summary input
+	 * @param string $labelText The html to place inside the label
+	 * @param array $inputAttrs Array of attrs to use on the input
+	 *
+	 * @return OOUI\FieldLayout OOUI FieldLayout with Label and Input
+	 */
+	function getSummaryInputWidget( $summary = "", $labelText = null, $inputAttrs = null ) {
+		$inputAttrs = OOUI\Element::configFromHtmlAttributes(
+			$this->getSummaryInputAttributes( $inputAttrs )
+		);
+		$inputAttrs += [
+			'title' => Linker::titleAttrib( 'summary' ),
+			'accessKey' => Linker::accesskey( 'summary' ),
+		];
+
+		// For compatibility with old scripts and extensions, we want the legacy 'id' on the `<input>`
+		$inputAttrs['inputId'] = $inputAttrs['id'];
+		$inputAttrs['id'] = 'wpSummaryWidget';
+
+		return new OOUI\FieldLayout(
+			new OOUI\TextInputWidget( [
+				'value' => $summary,
+				'infusable' => true,
+			] + $inputAttrs ),
+			[
+				'label' => new OOUI\HtmlSnippet( $labelText ),
+				'align' => 'top',
+				'id' => 'wpSummaryLabel',
+				'classes' => [ $this->missingSummary ? 'mw-summarymissed' : 'mw-summary' ],
+			]
+		);
+	}
+
+	/**
+	 * @param bool $isSubjectPreview True if this is the section subject/title
+	 *   up top, or false if this is the comment summary
+	 *   down below the textarea
+	 * @param string $summary The text of the summary to display
+	 */
+	protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
+		# Add a class if 'missingsummary' is triggered to allow styling of the summary line
+		$summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
+		if ( $isSubjectPreview ) {
+			if ( $this->nosummary ) {
+				return;
+			}
+		} else {
+			if ( !$this->mShowSummaryField ) {
+				return;
+			}
+		}
+
+		$labelText = $this->context->msg( $isSubjectPreview ? 'subject' : 'summary' )->parse();
+		$this->context->getOutput()->addHTML( $this->getSummaryInputWidget(
+				$summary,
+				$labelText,
+				[ 'class' => $summaryClass ]
+			) );
+	}
+
+	/**
+	 * @param bool $isSubjectPreview True if this is the section subject/title
+	 *   up top, or false if this is the comment summary
+	 *   down below the textarea
+	 * @param string $summary The text of the summary to display
+	 * @return string
+	 */
+	protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
+		// avoid spaces in preview, gets always trimmed on save
+		$summary = trim( $summary );
+		if ( !$summary || ( !$this->preview && !$this->diff ) ) {
+			return "";
+		}
+
+		global $wgParser;
+
+		if ( $isSubjectPreview ) {
+			$summary = $this->context->msg( 'newsectionsummary' )
+				->rawParams( $wgParser->stripSectionName( $summary ) )
+				->inContentLanguage()->text();
+		}
+
+		$message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
+
+		$summary = $this->context->msg( $message )->parse()
+			. Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
+		return Xml::tags( 'div', [ 'class' => 'mw-summary-preview' ], $summary );
+	}
+
+	protected function showFormBeforeText() {
+		$out = $this->context->getOutput();
+		$out->addHTML( Html::hidden( 'wpSection', $this->section ) );
+		$out->addHTML( Html::hidden( 'wpStarttime', $this->starttime ) );
+		$out->addHTML( Html::hidden( 'wpEdittime', $this->edittime ) );
+		$out->addHTML( Html::hidden( 'editRevId', $this->editRevId ) );
+		$out->addHTML( Html::hidden( 'wpScrolltop', $this->scrolltop, [ 'id' => 'wpScrolltop' ] ) );
+	}
+
+	protected function showFormAfterText() {
+		/**
+		 * To make it harder for someone to slip a user a page
+		 * which submits an edit form to the wiki without their
+		 * knowledge, a random token is associated with the login
+		 * session. If it's not passed back with the submission,
+		 * we won't save the page, or render user JavaScript and
+		 * CSS previews.
+		 *
+		 * For anon editors, who may not have a session, we just
+		 * include the constant suffix to prevent editing from
+		 * broken text-mangling proxies.
+		 */
+		$this->context->getOutput()->addHTML(
+			"\n" .
+			Html::hidden( "wpEditToken", $this->context->getUser()->getEditToken() ) .
+			"\n"
+		);
+	}
+
+	/**
+	 * Subpage overridable method for printing the form for page content editing
+	 * By default this simply outputs wpTextbox1
+	 * Subclasses can override this to provide a custom UI for editing;
+	 * be it a form, or simply wpTextbox1 with a modified content that will be
+	 * reverse modified when extracted from the post data.
+	 * Note that this is basically the inverse for importContentFormData
+	 */
+	protected function showContentForm() {
+		$this->showTextbox1();
+	}
+
+	/**
+	 * Method to output wpTextbox1
+	 * The $textoverride method can be used by subclasses overriding showContentForm
+	 * to pass back to this method.
+	 *
+	 * @param array $customAttribs Array of html attributes to use in the textarea
+	 * @param string $textoverride Optional text to override $this->textarea1 with
+	 */
+	protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
+		if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
+			$attribs = [ 'style' => 'display:none;' ];
+		} else {
+			$builder = new TextboxBuilder();
+			$classes = $builder->getTextboxProtectionCSSClasses( $this->getTitle() );
+
+			# Is an old revision being edited?
+			if ( $this->isOldRev ) {
+				$classes[] = 'mw-textarea-oldrev';
+			}
+
+			$attribs = [ 'tabindex' => 1 ];
+
+			if ( is_array( $customAttribs ) ) {
+				$attribs += $customAttribs;
+			}
+
+			$attribs = $builder->mergeClassesIntoAttributes( $classes, $attribs );
+		}
+
+		$this->showTextbox(
+			$textoverride !== null ? $textoverride : $this->textbox1,
+			'wpTextbox1',
+			$attribs
+		);
+	}
+
+	protected function showTextbox2() {
+		$this->showTextbox( $this->textbox2, 'wpTextbox2', [ 'tabindex' => 6, 'readonly' ] );
+	}
+
+	protected function showTextbox( $text, $name, $customAttribs = [] ) {
+		$builder = new TextboxBuilder();
+		$attribs = $builder->buildTextboxAttribs(
+			$name,
+			$customAttribs,
+			$this->context->getUser(),
+			$this->mTitle
+		);
+
+		$this->context->getOutput()->addHTML(
+			Html::textarea( $name, $builder->addNewLineAtEnd( $text ), $attribs )
+		);
+	}
+
+	protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
+		$classes = [];
+		if ( $isOnTop ) {
+			$classes[] = 'ontop';
+		}
+
+		$attribs = [ 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) ];
+
+		if ( $this->formtype != 'preview' ) {
+			$attribs['style'] = 'display: none;';
+		}
+
+		$out = $this->context->getOutput();
+		$out->addHTML( Xml::openElement( 'div', $attribs ) );
+
+		if ( $this->formtype == 'preview' ) {
+			$this->showPreview( $previewOutput );
+		} else {
+			// Empty content container for LivePreview
+			$pageViewLang = $this->mTitle->getPageViewLanguage();
+			$attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
+				'class' => 'mw-content-' . $pageViewLang->getDir() ];
+			$out->addHTML( Html::rawElement( 'div', $attribs ) );
+		}
+
+		$out->addHTML( '</div>' );
+
+		if ( $this->formtype == 'diff' ) {
+			try {
+				$this->showDiff();
+			} catch ( MWContentSerializationException $ex ) {
+				$msg = $this->context->msg(
+					'content-failed-to-parse',
+					$this->contentModel,
+					$this->contentFormat,
+					$ex->getMessage()
+				);
+				$out->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
+			}
+		}
+	}
+
+	/**
+	 * Append preview output to OutputPage.
+	 * Includes category rendering if this is a category page.
+	 *
+	 * @param string $text The HTML to be output for the preview.
+	 */
+	protected function showPreview( $text ) {
+		if ( $this->mArticle instanceof CategoryPage ) {
+			$this->mArticle->openShowCategory();
+		}
+		# This hook seems slightly odd here, but makes things more
+		# consistent for extensions.
+		$out = $this->context->getOutput();
+		Hooks::run( 'OutputPageBeforeHTML', [ &$out, &$text ] );
+		$out->addHTML( $text );
+		if ( $this->mArticle instanceof CategoryPage ) {
+			$this->mArticle->closeShowCategory();
+		}
+	}
+
+	/**
+	 * Get a diff between the current contents of the edit box and the
+	 * version of the page we're editing from.
+	 *
+	 * If this is a section edit, we'll replace the section as for final
+	 * save and then make a comparison.
+	 */
+	public function showDiff() {
+		global $wgContLang;
+
+		$oldtitlemsg = 'currentrev';
+		# if message does not exist, show diff against the preloaded default
+		if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
+			$oldtext = $this->mTitle->getDefaultMessageText();
+			if ( $oldtext !== false ) {
+				$oldtitlemsg = 'defaultmessagetext';
+				$oldContent = $this->toEditContent( $oldtext );
+			} else {
+				$oldContent = null;
+			}
+		} else {
+			$oldContent = $this->getCurrentContent();
+		}
+
+		$textboxContent = $this->toEditContent( $this->textbox1 );
+		if ( $this->editRevId !== null ) {
+			$newContent = $this->page->replaceSectionAtRev(
+				$this->section, $textboxContent, $this->summary, $this->editRevId
+			);
+		} else {
+			$newContent = $this->page->replaceSectionContent(
+				$this->section, $textboxContent, $this->summary, $this->edittime
+			);
+		}
+
+		if ( $newContent ) {
+			Hooks::run( 'EditPageGetDiffContent', [ $this, &$newContent ] );
+
+			$user = $this->context->getUser();
+			$popts = ParserOptions::newFromUserAndLang( $user, $wgContLang );
+			$newContent = $newContent->preSaveTransform( $this->mTitle, $user, $popts );
+		}
+
+		if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
+			$oldtitle = $this->context->msg( $oldtitlemsg )->parse();
+			$newtitle = $this->context->msg( 'yourtext' )->parse();
+
+			if ( !$oldContent ) {
+				$oldContent = $newContent->getContentHandler()->makeEmptyContent();
+			}
+
+			if ( !$newContent ) {
+				$newContent = $oldContent->getContentHandler()->makeEmptyContent();
+			}
+
+			$de = $oldContent->getContentHandler()->createDifferenceEngine( $this->context );
+			$de->setContent( $oldContent, $newContent );
+
+			$difftext = $de->getDiff( $oldtitle, $newtitle );
+			$de->showDiffStyle();
+		} else {
+			$difftext = '';
+		}
+
+		$this->context->getOutput()->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
+	}
+
+	/**
+	 * Show the header copyright warning.
+	 */
+	protected function showHeaderCopyrightWarning() {
+		$msg = 'editpage-head-copy-warn';
+		if ( !$this->context->msg( $msg )->isDisabled() ) {
+			$this->context->getOutput()->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
+				'editpage-head-copy-warn' );
+		}
+	}
+
+	/**
+	 * Give a chance for site and per-namespace customizations of
+	 * terms of service summary link that might exist separately
+	 * from the copyright notice.
+	 *
+	 * This will display between the save button and the edit tools,
+	 * so should remain short!
+	 */
+	protected function showTosSummary() {
+		$msg = 'editpage-tos-summary';
+		Hooks::run( 'EditPageTosSummary', [ $this->mTitle, &$msg ] );
+		if ( !$this->context->msg( $msg )->isDisabled() ) {
+			$out = $this->context->getOutput();
+			$out->addHTML( '<div class="mw-tos-summary">' );
+			$out->addWikiMsg( $msg );
+			$out->addHTML( '</div>' );
+		}
+	}
+
+	/**
+	 * Inserts optional text shown below edit and upload forms. Can be used to offer special
+	 * characters not present on most keyboards for copying/pasting.
+	 */
+	protected function showEditTools() {
+		$this->context->getOutput()->addHTML( '<div class="mw-editTools">' .
+			$this->context->msg( 'edittools' )->inContentLanguage()->parse() .
+			'</div>' );
+	}
+
+	/**
+	 * Get the copyright warning
+	 *
+	 * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
+	 * @return string
+	 */
+	protected function getCopywarn() {
+		return self::getCopyrightWarning( $this->mTitle );
+	}
+
+	/**
+	 * Get the copyright warning, by default returns wikitext
+	 *
+	 * @param Title $title
+	 * @param string $format Output format, valid values are any function of a Message object
+	 * @param Language|string|null $langcode Language code or Language object.
+	 * @return string
+	 */
+	public static function getCopyrightWarning( $title, $format = 'plain', $langcode = null ) {
+		global $wgRightsText;
+		if ( $wgRightsText ) {
+			$copywarnMsg = [ 'copyrightwarning',
+				'[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
+				$wgRightsText ];
+		} else {
+			$copywarnMsg = [ 'copyrightwarning2',
+				'[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' ];
+		}
+		// Allow for site and per-namespace customization of contribution/copyright notice.
+		Hooks::run( 'EditPageCopyrightWarning', [ $title, &$copywarnMsg ] );
+
+		$msg = call_user_func_array( 'wfMessage', $copywarnMsg )->title( $title );
+		if ( $langcode ) {
+			$msg->inLanguage( $langcode );
+		}
+		return "<div id=\"editpage-copywarn\">\n" .
+			$msg->$format() . "\n</div>";
+	}
+
+	/**
+	 * Get the Limit report for page previews
+	 *
+	 * @since 1.22
+	 * @param ParserOutput $output ParserOutput object from the parse
+	 * @return string HTML
+	 */
+	public static function getPreviewLimitReport( $output ) {
+		global $wgLang;
+
+		if ( !$output || !$output->getLimitReportData() ) {
+			return '';
+		}
+
+		$limitReport = Html::rawElement( 'div', [ 'class' => 'mw-limitReportExplanation' ],
+			wfMessage( 'limitreport-title' )->parseAsBlock()
+		);
+
+		// Show/hide animation doesn't work correctly on a table, so wrap it in a div.
+		$limitReport .= Html::openElement( 'div', [ 'class' => 'preview-limit-report-wrapper' ] );
+
+		$limitReport .= Html::openElement( 'table', [
+			'class' => 'preview-limit-report wikitable'
+		] ) .
+			Html::openElement( 'tbody' );
+
+		foreach ( $output->getLimitReportData() as $key => $value ) {
+			if ( Hooks::run( 'ParserLimitReportFormat',
+				[ $key, &$value, &$limitReport, true, true ]
+			) ) {
+				$keyMsg = wfMessage( $key );
+				$valueMsg = wfMessage( [ "$key-value-html", "$key-value" ] );
+				if ( !$valueMsg->exists() ) {
+					$valueMsg = new RawMessage( '$1' );
+				}
+				if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
+					$limitReport .= Html::openElement( 'tr' ) .
+						Html::rawElement( 'th', null, $keyMsg->parse() ) .
+						Html::rawElement( 'td', null,
+							$wgLang->formatNum( $valueMsg->params( $value )->parse() )
+						) .
+						Html::closeElement( 'tr' );
+				}
+			}
+		}
+
+		$limitReport .= Html::closeElement( 'tbody' ) .
+			Html::closeElement( 'table' ) .
+			Html::closeElement( 'div' );
+
+		return $limitReport;
+	}
+
+	protected function showStandardInputs( &$tabindex = 2 ) {
+		$out = $this->context->getOutput();
+		$out->addHTML( "<div class='editOptions'>\n" );
+
+		if ( $this->section != 'new' ) {
+			$this->showSummaryInput( false, $this->summary );
+			$out->addHTML( $this->getSummaryPreview( false, $this->summary ) );
+		}
+
+		$checkboxes = $this->getCheckboxesWidget(
+			$tabindex,
+			[ 'minor' => $this->minoredit, 'watch' => $this->watchthis ]
+		);
+		$checkboxesHTML = new OOUI\HorizontalLayout( [ 'items' => $checkboxes ] );
+
+		$out->addHTML( "<div class='editCheckboxes'>" . $checkboxesHTML . "</div>\n" );
+
+		// Show copyright warning.
+		$out->addWikiText( $this->getCopywarn() );
+		$out->addHTML( $this->editFormTextAfterWarn );
+
+		$out->addHTML( "<div class='editButtons'>\n" );
+		$out->addHTML( implode( "\n", $this->getEditButtons( $tabindex ) ) . "\n" );
+
+		$cancel = $this->getCancelLink();
+
+		$message = $this->context->msg( 'edithelppage' )->inContentLanguage()->text();
+		$edithelpurl = Skin::makeInternalOrExternalUrl( $message );
+		$edithelp =
+			Html::linkButton(
+				$this->context->msg( 'edithelp' )->text(),
+				[ 'target' => 'helpwindow', 'href' => $edithelpurl ],
+				[ 'mw-ui-quiet' ]
+			) .
+			$this->context->msg( 'word-separator' )->escaped() .
+			$this->context->msg( 'newwindow' )->parse();
+
+		$out->addHTML( "	<span class='cancelLink'>{$cancel}</span>\n" );
+		$out->addHTML( "	<span class='editHelp'>{$edithelp}</span>\n" );
+		$out->addHTML( "</div><!-- editButtons -->\n" );
+
+		Hooks::run( 'EditPage::showStandardInputs:options', [ $this, $out, &$tabindex ] );
+
+		$out->addHTML( "</div><!-- editOptions -->\n" );
+	}
+
+	/**
+	 * Show an edit conflict. textbox1 is already shown in showEditForm().
+	 * If you want to use another entry point to this function, be careful.
+	 */
+	protected function showConflict() {
+		$out = $this->context->getOutput();
+		// Avoid PHP 7.1 warning of passing $this by reference
+		$editPage = $this;
+		if ( Hooks::run( 'EditPageBeforeConflictDiff', [ &$editPage, &$out ] ) ) {
+			$this->incrementConflictStats();
+
+			$this->getEditConflictHelper()->showEditFormTextAfterFooters();
+		}
+	}
+
+	protected function incrementConflictStats() {
+		$this->getEditConflictHelper()->incrementConflictStats();
+	}
+
+	/**
+	 * @return string
+	 */
+	public function getCancelLink() {
+		$cancelParams = [];
+		if ( !$this->isConflict && $this->oldid > 0 ) {
+			$cancelParams['oldid'] = $this->oldid;
+		} elseif ( $this->getContextTitle()->isRedirect() ) {
+			$cancelParams['redirect'] = 'no';
+		}
+
+		return new OOUI\ButtonWidget( [
+			'id' => 'mw-editform-cancel',
+			'href' => $this->getContextTitle()->getLinkURL( $cancelParams ),
+			'label' => new OOUI\HtmlSnippet( $this->context->msg( 'cancel' )->parse() ),
+			'framed' => false,
+			'infusable' => true,
+			'flags' => 'destructive',
+		] );
+	}
+
+	/**
+	 * Returns the URL to use in the form's action attribute.
+	 * This is used by EditPage subclasses when simply customizing the action
+	 * variable in the constructor is not enough. This can be used when the
+	 * EditPage lives inside of a Special page rather than a custom page action.
+	 *
+	 * @param Title $title Title object for which is being edited (where we go to for &action= links)
+	 * @return string
+	 */
+	protected function getActionURL( Title $title ) {
+		return $title->getLocalURL( [ 'action' => $this->action ] );
+	}
+
+	/**
+	 * Check if a page was deleted while the user was editing it, before submit.
+	 * Note that we rely on the logging table, which hasn't been always there,
+	 * but that doesn't matter, because this only applies to brand new
+	 * deletes.
+	 * @return bool
+	 */
+	protected function wasDeletedSinceLastEdit() {
+		if ( $this->deletedSinceEdit !== null ) {
+			return $this->deletedSinceEdit;
+		}
+
+		$this->deletedSinceEdit = false;
+
+		if ( !$this->mTitle->exists() && $this->mTitle->isDeletedQuick() ) {
+			$this->lastDelete = $this->getLastDelete();
+			if ( $this->lastDelete ) {
+				$deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
+				if ( $deleteTime > $this->starttime ) {
+					$this->deletedSinceEdit = true;
+				}
+			}
+		}
+
+		return $this->deletedSinceEdit;
+	}
+
+	/**
+	 * @return bool|stdClass
+	 */
+	protected function getLastDelete() {
+		$dbr = wfGetDB( DB_REPLICA );
+		$commentQuery = CommentStore::getStore()->getJoin( 'log_comment' );
+		$actorQuery = ActorMigration::newMigration()->getJoin( 'log_user' );
+		$data = $dbr->selectRow(
+			array_merge( [ 'logging' ], $commentQuery['tables'], $actorQuery['tables'], [ 'user' ] ),
+			[
+				'log_type',
+				'log_action',
+				'log_timestamp',
+				'log_namespace',
+				'log_title',
+				'log_params',
+				'log_deleted',
+				'user_name'
+			] + $commentQuery['fields'] + $actorQuery['fields'],
+			[
+				'log_namespace' => $this->mTitle->getNamespace(),
+				'log_title' => $this->mTitle->getDBkey(),
+				'log_type' => 'delete',
+				'log_action' => 'delete',
+			],
+			__METHOD__,
+			[ 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ],
+			[
+				'user' => [ 'JOIN', 'user_id=' . $actorQuery['fields']['log_user'] ],
+			] + $commentQuery['joins'] + $actorQuery['joins']
+		);
+		// Quick paranoid permission checks...
+		if ( is_object( $data ) ) {
+			if ( $data->log_deleted & LogPage::DELETED_USER ) {
+				$data->user_name = $this->context->msg( 'rev-deleted-user' )->escaped();
+			}
+
+			if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
+				$data->log_comment_text = $this->context->msg( 'rev-deleted-comment' )->escaped();
+				$data->log_comment_data = null;
+			}
+		}
+
+		return $data;
+	}
+
+	/**
+	 * Get the rendered text for previewing.
+	 * @throws MWException
+	 * @return string
+	 */
+	public function getPreviewText() {
+		$out = $this->context->getOutput();
+		$config = $this->context->getConfig();
+
+		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 = '';
+			if ( $this->textbox1 !== '' ) {
+				// Do not put big scary notice, if previewing the empty
+				// string, which happens when you initially edit
+				// a category page, due to automatic preview-on-open.
+				$parsedNote = $out->parse( "<div class='previewnote'>" .
+					$this->context->msg( 'session_fail_preview_html' )->text() . "</div>",
+					true, /* interface */true );
+			}
+			$this->incrementEditFailureStats( 'session_loss' );
+			return $parsedNote;
+		}
+
+		$note = '';
+
+		try {
+			$content = $this->toEditContent( $this->textbox1 );
+
+			$previewHTML = '';
+			if ( !Hooks::run(
+				'AlternateEditPreview',
+				[ $this, &$content, &$previewHTML, &$this->mParserOutput ] )
+			) {
+				return $previewHTML;
+			}
+
+			# provide a anchor link to the editform
+			$continueEditing = '<span class="mw-continue-editing">' .
+				'[[#' . self::EDITFORM_ID . '|' .
+				$this->context->getLanguage()->getArrow() . ' ' .
+				$this->context->msg( 'continue-editing' )->text() . ']]</span>';
+			if ( $this->mTriedSave && !$this->mTokenOk ) {
+				if ( $this->mTokenOkExceptSuffix ) {
+					$note = $this->context->msg( 'token_suffix_mismatch' )->plain();
+					$this->incrementEditFailureStats( 'bad_token' );
+				} else {
+					$note = $this->context->msg( 'session_fail_preview' )->plain();
+					$this->incrementEditFailureStats( 'session_loss' );
+				}
+			} elseif ( $this->incompleteForm ) {
+				$note = $this->context->msg( 'edit_form_incomplete' )->plain();
+				if ( $this->mTriedSave ) {
+					$this->incrementEditFailureStats( 'incomplete_form' );
+				}
+			} else {
+				$note = $this->context->msg( 'previewnote' )->plain() . ' ' . $continueEditing;
+			}
+
+			# don't parse non-wikitext pages, show message about preview
+			if ( $this->mTitle->isUserConfigPage() || $this->mTitle->isSiteConfigPage() ) {
+				if ( $this->mTitle->isUserConfigPage() ) {
+					$level = 'user';
+				} elseif ( $this->mTitle->isSiteConfigPage() ) {
+					$level = 'site';
+				} else {
+					$level = false;
+				}
+
+				if ( $content->getModel() == CONTENT_MODEL_CSS ) {
+					$format = 'css';
+					if ( $level === 'user' && !$config->get( 'AllowUserCss' ) ) {
+						$format = false;
+					}
+				} elseif ( $content->getModel() == CONTENT_MODEL_JSON ) {
+					$format = 'json';
+					if ( $level === 'user' /* No comparable 'AllowUserJson' */ ) {
+						$format = false;
+					}
+				} elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
+					$format = 'js';
+					if ( $level === 'user' && !$config->get( 'AllowUserJs' ) ) {
+						$format = false;
+					}
+				} else {
+					$format = false;
+				}
+
+				# Used messages to make sure grep find them:
+				# Messages: usercsspreview, userjsonpreview, userjspreview,
+				#   sitecsspreview, sitejsonpreview, sitejspreview
+				if ( $level && $format ) {
+					$note = "<div id='mw-{$level}{$format}preview'>" .
+						$this->context->msg( "{$level}{$format}preview" )->text() .
+						' ' . $continueEditing . "</div>";
+				}
+			}
+
+			# If we're adding a comment, we need to show the
+			# summary as the headline
+			if ( $this->section === "new" && $this->summary !== "" ) {
+				$content = $content->addSectionHeader( $this->summary );
+			}
+
+			$hook_args = [ $this, &$content ];
+			Hooks::run( 'EditPageGetPreviewContent', $hook_args );
+
+			$parserResult = $this->doPreviewParse( $content );
+			$parserOutput = $parserResult['parserOutput'];
+			$previewHTML = $parserResult['html'];
+			$this->mParserOutput = $parserOutput;
+			$out->addParserOutputMetadata( $parserOutput );
+
+			if ( count( $parserOutput->getWarnings() ) ) {
+				$note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
+			}
+
+		} catch ( MWContentSerializationException $ex ) {
+			$m = $this->context->msg(
+				'content-failed-to-parse',
+				$this->contentModel,
+				$this->contentFormat,
+				$ex->getMessage()
+			);
+			$note .= "\n\n" . $m->parse();
+			$previewHTML = '';
+		}
+
+		if ( $this->isConflict ) {
+			$conflict = '<h2 id="mw-previewconflict">'
+				. $this->context->msg( 'previewconflict' )->escaped() . "</h2>\n";
+		} else {
+			$conflict = '<hr />';
+		}
+
+		$previewhead = "<div class='previewnote'>\n" .
+			'<h2 id="mw-previewheader">' . $this->context->msg( 'preview' )->escaped() . "</h2>" .
+			$out->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
+
+		$pageViewLang = $this->mTitle->getPageViewLanguage();
+		$attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
+			'class' => 'mw-content-' . $pageViewLang->getDir() ];
+		$previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
+
+		return $previewhead . $previewHTML . $this->previewTextAfterContent;
+	}
+
+	private function incrementEditFailureStats( $failureType ) {
+		$stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
+		$stats->increment( 'edit.failures.' . $failureType );
+	}
+
+	/**
+	 * Get parser options for a preview
+	 * @return ParserOptions
+	 */
+	protected function getPreviewParserOptions() {
+		$parserOptions = $this->page->makeParserOptions( $this->context );
+		$parserOptions->setIsPreview( true );
+		$parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
+		$parserOptions->enableLimitReport();
+		return $parserOptions;
+	}
+
+	/**
+	 * Parse the page for a preview. Subclasses may override this class, in order
+	 * to parse with different options, or to otherwise modify the preview HTML.
+	 *
+	 * @param Content $content The page content
+	 * @return array with keys:
+	 *   - parserOutput: The ParserOutput object
+	 *   - html: The HTML to be displayed
+	 */
+	protected function doPreviewParse( Content $content ) {
+		$user = $this->context->getUser();
+		$parserOptions = $this->getPreviewParserOptions();
+		$pstContent = $content->preSaveTransform( $this->mTitle, $user, $parserOptions );
+		$scopedCallback = $parserOptions->setupFakeRevision(
+			$this->mTitle, $pstContent, $user );
+		$parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
+		ScopedCallback::consume( $scopedCallback );
+		return [
+			'parserOutput' => $parserOutput,
+			'html' => $parserOutput->getText( [
+				'enableSectionEditLinks' => false
+			] )
+		];
+	}
+
+	/**
+	 * @return array
+	 */
+	public function getTemplates() {
+		if ( $this->preview || $this->section != '' ) {
+			$templates = [];
+			if ( !isset( $this->mParserOutput ) ) {
+				return $templates;
+			}
+			foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
+				foreach ( array_keys( $template ) as $dbk ) {
+					$templates[] = Title::makeTitle( $ns, $dbk );
+				}
+			}
+			return $templates;
+		} else {
+			return $this->mTitle->getTemplateLinksFrom();
+		}
+	}
+
+	/**
+	 * Shows a bulletin board style toolbar for common editing functions.
+	 * It can be disabled in the user preferences.
+	 *
+	 * @param Title $title Title object for the page being edited (optional)
+	 * @return string
+	 */
+	public static function getEditToolbar( $title = null ) {
+		global $wgContLang, $wgOut;
+		global $wgEnableUploads, $wgForeignFileRepos;
+
+		$imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
+		$showSignature = true;
+		if ( $title ) {
+			$showSignature = MWNamespace::wantSignatures( $title->getNamespace() );
+		}
+
+		/**
+		 * $toolarray is an array of arrays each of which includes the
+		 * opening tag, the closing tag, optionally a sample text that is
+		 * inserted between the two when no selection is highlighted
+		 * and.  The tip text is shown when the user moves the mouse
+		 * over the button.
+		 *
+		 * Images are defined in ResourceLoaderEditToolbarModule.
+		 */
+		$toolarray = [
+			[
+				'id'     => 'mw-editbutton-bold',
+				'open'   => '\'\'\'',
+				'close'  => '\'\'\'',
+				'sample' => wfMessage( 'bold_sample' )->text(),
+				'tip'    => wfMessage( 'bold_tip' )->text(),
+			],
+			[
+				'id'     => 'mw-editbutton-italic',
+				'open'   => '\'\'',
+				'close'  => '\'\'',
+				'sample' => wfMessage( 'italic_sample' )->text(),
+				'tip'    => wfMessage( 'italic_tip' )->text(),
+			],
+			[
+				'id'     => 'mw-editbutton-link',
+				'open'   => '[[',
+				'close'  => ']]',
+				'sample' => wfMessage( 'link_sample' )->text(),
+				'tip'    => wfMessage( 'link_tip' )->text(),
+			],
+			[
+				'id'     => 'mw-editbutton-extlink',
+				'open'   => '[',
+				'close'  => ']',
+				'sample' => wfMessage( 'extlink_sample' )->text(),
+				'tip'    => wfMessage( 'extlink_tip' )->text(),
+			],
+			[
+				'id'     => 'mw-editbutton-headline',
+				'open'   => "\n== ",
+				'close'  => " ==\n",
+				'sample' => wfMessage( 'headline_sample' )->text(),
+				'tip'    => wfMessage( 'headline_tip' )->text(),
+			],
+			$imagesAvailable ? [
+				'id'     => 'mw-editbutton-image',
+				'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
+				'close'  => ']]',
+				'sample' => wfMessage( 'image_sample' )->text(),
+				'tip'    => wfMessage( 'image_tip' )->text(),
+			] : false,
+			$imagesAvailable ? [
+				'id'     => 'mw-editbutton-media',
+				'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
+				'close'  => ']]',
+				'sample' => wfMessage( 'media_sample' )->text(),
+				'tip'    => wfMessage( 'media_tip' )->text(),
+			] : false,
+			[
+				'id'     => 'mw-editbutton-nowiki',
+				'open'   => "<nowiki>",
+				'close'  => "</nowiki>",
+				'sample' => wfMessage( 'nowiki_sample' )->text(),
+				'tip'    => wfMessage( 'nowiki_tip' )->text(),
+			],
+			$showSignature ? [
+				'id'     => 'mw-editbutton-signature',
+				'open'   => wfMessage( 'sig-text', '~~~~' )->inContentLanguage()->text(),
+				'close'  => '',
+				'sample' => '',
+				'tip'    => wfMessage( 'sig_tip' )->text(),
+			] : false,
+			[
+				'id'     => 'mw-editbutton-hr',
+				'open'   => "\n----\n",
+				'close'  => '',
+				'sample' => '',
+				'tip'    => wfMessage( 'hr_tip' )->text(),
+			]
+		];
+
+		$script = 'mw.loader.using("mediawiki.toolbar", function () {';
+		foreach ( $toolarray as $tool ) {
+			if ( !$tool ) {
+				continue;
+			}
+
+			$params = [
+				// Images are defined in ResourceLoaderEditToolbarModule
+				false,
+				// Note that we use the tip both for the ALT tag and the TITLE tag of the image.
+				// Older browsers show a "speedtip" type message only for ALT.
+				// Ideally these should be different, realistically they
+				// probably don't need to be.
+				$tool['tip'],
+				$tool['open'],
+				$tool['close'],
+				$tool['sample'],
+				$tool['id'],
+			];
+
+			$script .= Xml::encodeJsCall(
+				'mw.toolbar.addButton',
+				$params,
+				ResourceLoader::inDebugMode()
+			);
+		}
+
+		$script .= '});';
+
+		$toolbar = '<div id="toolbar"></div>';
+
+		if ( Hooks::run( 'EditPageBeforeEditToolbar', [ &$toolbar ] ) ) {
+			// Only add the old toolbar cruft to the page payload if the toolbar has not
+			// been over-written by a hook caller
+			$wgOut->addScript( ResourceLoader::makeInlineScript( $script ) );
+		};
+
+		return $toolbar;
+	}
+
+	/**
+	 * Return an array of checkbox definitions.
+	 *
+	 * Array keys correspond to the `<input>` 'name' attribute to use for each checkbox.
+	 *
+	 * Array values are associative arrays with the following keys:
+	 *  - 'label-message' (required): message for label text
+	 *  - 'id' (required): 'id' attribute for the `<input>`
+	 *  - 'default' (required): default checkedness (true or false)
+	 *  - 'title-message' (optional): used to generate 'title' attribute for the `<label>`
+	 *  - 'tooltip' (optional): used to generate 'title' and 'accesskey' attributes
+	 *    from messages like 'tooltip-foo', 'accesskey-foo'
+	 *  - 'label-id' (optional): 'id' attribute for the `<label>`
+	 *  - 'legacy-name' (optional): short name for backwards-compatibility
+	 * @param array $checked Array of checkbox name (matching the 'legacy-name') => bool,
+	 *   where bool indicates the checked status of the checkbox
+	 * @return array
+	 */
+	public function getCheckboxesDefinition( $checked ) {
+		$checkboxes = [];
+
+		$user = $this->context->getUser();
+		// don't show the minor edit checkbox if it's a new page or section
+		if ( !$this->isNew && $user->isAllowed( 'minoredit' ) ) {
+			$checkboxes['wpMinoredit'] = [
+				'id' => 'wpMinoredit',
+				'label-message' => 'minoredit',
+				// Uses messages: tooltip-minoredit, accesskey-minoredit
+				'tooltip' => 'minoredit',
+				'label-id' => 'mw-editpage-minoredit',
+				'legacy-name' => 'minor',
+				'default' => $checked['minor'],
+			];
+		}
+
+		if ( $user->isLoggedIn() ) {
+			$checkboxes['wpWatchthis'] = [
+				'id' => 'wpWatchthis',
+				'label-message' => 'watchthis',
+				// Uses messages: tooltip-watch, accesskey-watch
+				'tooltip' => 'watch',
+				'label-id' => 'mw-editpage-watch',
+				'legacy-name' => 'watch',
+				'default' => $checked['watch'],
+			];
+		}
+
+		$editPage = $this;
+		Hooks::run( 'EditPageGetCheckboxesDefinition', [ $editPage, &$checkboxes ] );
+
+		return $checkboxes;
+	}
+
+	/**
+	 * Returns an array of checkboxes for the edit form, including 'minor' and 'watch' checkboxes and
+	 * any other added by extensions.
+	 *
+	 * @param int &$tabindex Current tabindex
+	 * @param array $checked Array of checkbox => bool, where bool indicates the checked
+	 *                 status of the checkbox
+	 *
+	 * @return array Associative array of string keys to OOUI\FieldLayout instances
+	 */
+	public function getCheckboxesWidget( &$tabindex, $checked ) {
+		$checkboxes = [];
+		$checkboxesDef = $this->getCheckboxesDefinition( $checked );
+
+		foreach ( $checkboxesDef as $name => $options ) {
+			$legacyName = isset( $options['legacy-name'] ) ? $options['legacy-name'] : $name;
+
+			$title = null;
+			$accesskey = null;
+			if ( isset( $options['tooltip'] ) ) {
+				$accesskey = $this->context->msg( "accesskey-{$options['tooltip']}" )->text();
+				$title = Linker::titleAttrib( $options['tooltip'] );
+			}
+			if ( isset( $options['title-message'] ) ) {
+				$title = $this->context->msg( $options['title-message'] )->text();
+			}
+
+			$checkboxes[ $legacyName ] = new OOUI\FieldLayout(
+				new OOUI\CheckboxInputWidget( [
+					'tabIndex' => ++$tabindex,
+					'accessKey' => $accesskey,
+					'id' => $options['id'] . 'Widget',
+					'inputId' => $options['id'],
+					'name' => $name,
+					'selected' => $options['default'],
+					'infusable' => true,
+				] ),
+				[
+					'align' => 'inline',
+					'label' => new OOUI\HtmlSnippet( $this->context->msg( $options['label-message'] )->parse() ),
+					'title' => $title,
+					'id' => isset( $options['label-id'] ) ? $options['label-id'] : null,
+				]
+			);
+		}
+
+		// Backwards-compatibility hack to run the EditPageBeforeEditChecks hook. It's important,
+		// people have used it for the weirdest things completely unrelated to checkboxes...
+		// And if we're gonna run it, might as well allow its legacy checkboxes to be shown.
+		$legacyCheckboxes = [];
+		if ( !$this->isNew ) {
+			$legacyCheckboxes['minor'] = '';
+		}
+		$legacyCheckboxes['watch'] = '';
+		// Copy new-style checkboxes into an old-style structure
+		foreach ( $checkboxes as $name => $oouiLayout ) {
+			$legacyCheckboxes[$name] = (string)$oouiLayout;
+		}
+		// Avoid PHP 7.1 warning of passing $this by reference
+		$ep = $this;
+		Hooks::run( 'EditPageBeforeEditChecks', [ &$ep, &$legacyCheckboxes, &$tabindex ], '1.29' );
+		// Copy back any additional old-style checkboxes into the new-style structure
+		foreach ( $legacyCheckboxes as $name => $html ) {
+			if ( $html && !isset( $checkboxes[$name] ) ) {
+				$checkboxes[$name] = new OOUI\Widget( [ 'content' => new OOUI\HtmlSnippet( $html ) ] );
+			}
+		}
+
+		return $checkboxes;
+	}
+
+	/**
+	 * Get the message key of the label for the button to save the page
+	 *
+	 * @since 1.30
+	 * @return string
+	 */
+	protected function getSubmitButtonLabel() {
+		$labelAsPublish =
+			$this->context->getConfig()->get( 'EditSubmitButtonLabelPublish' );
+
+		// Can't use $this->isNew as that's also true if we're adding a new section to an extant page
+		$newPage = !$this->mTitle->exists();
+
+		if ( $labelAsPublish ) {
+			$buttonLabelKey = $newPage ? 'publishpage' : 'publishchanges';
+		} else {
+			$buttonLabelKey = $newPage ? 'savearticle' : 'savechanges';
+		}
+
+		return $buttonLabelKey;
+	}
+
+	/**
+	 * Returns an array of html code of the following buttons:
+	 * save, diff and preview
+	 *
+	 * @param int &$tabindex Current tabindex
+	 *
+	 * @return array
+	 */
+	public function getEditButtons( &$tabindex ) {
+		$buttons = [];
+
+		$labelAsPublish =
+			$this->context->getConfig()->get( 'EditSubmitButtonLabelPublish' );
+
+		$buttonLabel = $this->context->msg( $this->getSubmitButtonLabel() )->text();
+		$buttonTooltip = $labelAsPublish ? 'publish' : 'save';
+
+		$buttons['save'] = new OOUI\ButtonInputWidget( [
+			'name' => 'wpSave',
+			'tabIndex' => ++$tabindex,
+			'id' => 'wpSaveWidget',
+			'inputId' => 'wpSave',
+			// Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
+			'useInputTag' => true,
+			'flags' => [ 'progressive', 'primary' ],
+			'label' => $buttonLabel,
+			'infusable' => true,
+			'type' => 'submit',
+			// Messages used: tooltip-save, tooltip-publish
+			'title' => Linker::titleAttrib( $buttonTooltip ),
+			// Messages used: accesskey-save, accesskey-publish
+			'accessKey' => Linker::accesskey( $buttonTooltip ),
+		] );
+
+		$buttons['preview'] = new OOUI\ButtonInputWidget( [
+			'name' => 'wpPreview',
+			'tabIndex' => ++$tabindex,
+			'id' => 'wpPreviewWidget',
+			'inputId' => 'wpPreview',
+			// Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
+			'useInputTag' => true,
+			'label' => $this->context->msg( 'showpreview' )->text(),
+			'infusable' => true,
+			'type' => 'submit',
+			// Message used: tooltip-preview
+			'title' => Linker::titleAttrib( 'preview' ),
+			// Message used: accesskey-preview
+			'accessKey' => Linker::accesskey( 'preview' ),
+		] );
+
+		$buttons['diff'] = new OOUI\ButtonInputWidget( [
+			'name' => 'wpDiff',
+			'tabIndex' => ++$tabindex,
+			'id' => 'wpDiffWidget',
+			'inputId' => 'wpDiff',
+			// Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
+			'useInputTag' => true,
+			'label' => $this->context->msg( 'showdiff' )->text(),
+			'infusable' => true,
+			'type' => 'submit',
+			// Message used: tooltip-diff
+			'title' => Linker::titleAttrib( 'diff' ),
+			// Message used: accesskey-diff
+			'accessKey' => Linker::accesskey( 'diff' ),
+		] );
+
+		// Avoid PHP 7.1 warning of passing $this by reference
+		$editPage = $this;
+		Hooks::run( 'EditPageBeforeEditButtons', [ &$editPage, &$buttons, &$tabindex ] );
+
+		return $buttons;
+	}
+
+	/**
+	 * Creates a basic error page which informs the user that
+	 * they have attempted to edit a nonexistent section.
+	 */
+	public function noSuchSectionPage() {
+		$out = $this->context->getOutput();
+		$out->prepareErrorPage( $this->context->msg( 'nosuchsectiontitle' ) );
+
+		$res = $this->context->msg( 'nosuchsectiontext', $this->section )->parseAsBlock();
+
+		// Avoid PHP 7.1 warning of passing $this by reference
+		$editPage = $this;
+		Hooks::run( 'EditPageNoSuchSection', [ &$editPage, &$res ] );
+		$out->addHTML( $res );
+
+		$out->returnToMain( false, $this->mTitle );
+	}
+
+	/**
+	 * Show "your edit contains spam" page with your diff and text
+	 *
+	 * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
+	 */
+	public function spamPageWithContent( $match = false ) {
+		$this->textbox2 = $this->textbox1;
+
+		if ( is_array( $match ) ) {
+			$match = $this->context->getLanguage()->listToText( $match );
+		}
+		$out = $this->context->getOutput();
+		$out->prepareErrorPage( $this->context->msg( 'spamprotectiontitle' ) );
+
+		$out->addHTML( '<div id="spamprotected">' );
+		$out->addWikiMsg( 'spamprotectiontext' );
+		if ( $match ) {
+			$out->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
+		}
+		$out->addHTML( '</div>' );
+
+		$out->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
+		$this->showDiff();
+
+		$out->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
+		$this->showTextbox2();
+
+		$out->addReturnTo( $this->getContextTitle(), [ 'action' => 'edit' ] );
+	}
+
+	/**
+	 * 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 ) {
+		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 $text;
+	}
+
+	/**
+	 * @since 1.29
+	 */
+	protected function addEditNotices() {
+		$out = $this->context->getOutput();
+		$editNotices = $this->mTitle->getEditNotices( $this->oldid );
+		if ( count( $editNotices ) ) {
+			$out->addHTML( implode( "\n", $editNotices ) );
+		} else {
+			$msg = $this->context->msg( 'editnotice-notext' );
+			if ( !$msg->isDisabled() ) {
+				$out->addHTML(
+					'<div class="mw-editnotice-notext">'
+					. $msg->parseAsBlock()
+					. '</div>'
+				);
+			}
+		}
+	}
+
+	/**
+	 * @since 1.29
+	 */
+	protected function addTalkPageText() {
+		if ( $this->mTitle->isTalkPage() ) {
+			$this->context->getOutput()->addWikiMsg( 'talkpagetext' );
+		}
+	}
+
+	/**
+	 * @since 1.29
+	 */
+	protected function addLongPageWarningHeader() {
+		if ( $this->contentLength === false ) {
+			$this->contentLength = strlen( $this->textbox1 );
+		}
+
+		$out = $this->context->getOutput();
+		$lang = $this->context->getLanguage();
+		$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( $maxArticleSize )
+				]
+			);
+		} else {
+			if ( !$this->context->msg( 'longpage-hint' )->isDisabled() ) {
+				$out->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
+					[
+						'longpage-hint',
+						$lang->formatSize( strlen( $this->textbox1 ) ),
+						strlen( $this->textbox1 )
+					]
+				);
+			}
+		}
+	}
+
+	/**
+	 * @since 1.29
+	 */
+	protected function addPageProtectionWarningHeaders() {
+		$out = $this->context->getOutput();
+		if ( $this->mTitle->isProtected( 'edit' ) &&
+			MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
+		) {
+			# Is the title semi-protected?
+			if ( $this->mTitle->isSemiProtected() ) {
+				$noticeMsg = 'semiprotectedpagewarning';
+			} else {
+				# Then it must be protected based on static groups (regular)
+				$noticeMsg = 'protectedpagewarning';
+			}
+			LogEventsList::showLogExtract( $out, 'protect', $this->mTitle, '',
+				[ 'lim' => 1, 'msgKey' => [ $noticeMsg ] ] );
+		}
+		if ( $this->mTitle->isCascadeProtected() ) {
+			# Is this page under cascading protection from some source pages?
+			/** @var Title[] $cascadeSources */
+			list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
+			$notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
+			$cascadeSourcesCount = count( $cascadeSources );
+			if ( $cascadeSourcesCount > 0 ) {
+				# Explain, and list the titles responsible
+				foreach ( $cascadeSources as $page ) {
+					$notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
+				}
+			}
+			$notice .= '</div>';
+			$out->wrapWikiMsg( $notice, [ 'cascadeprotectedwarning', $cascadeSourcesCount ] );
+		}
+		if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
+			LogEventsList::showLogExtract( $out, 'protect', $this->mTitle, '',
+				[ 'lim' => 1,
+					'showIfEmpty' => false,
+					'msgKey' => [ 'titleprotectedwarning' ],
+					'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ] );
+		}
+	}
+
+	/**
+	 * @param OutputPage $out
+	 * @since 1.29
+	 */
+	protected function addExplainConflictHeader( OutputPage $out ) {
+		$out->addHTML(
+			$this->getEditConflictHelper()->getExplainHeader()
+		);
+	}
+
+	/**
+	 * @param string $name
+	 * @param mixed[] $customAttribs
+	 * @param User $user
+	 * @return mixed[]
+	 * @since 1.29
+	 */
+	protected function buildTextboxAttribs( $name, array $customAttribs, User $user ) {
+		return ( new TextboxBuilder() )->buildTextboxAttribs(
+			$name, $customAttribs, $user, $this->mTitle
+		);
+	}
+
+	/**
+	 * @param string $wikitext
+	 * @return string
+	 * @since 1.29
+	 */
+	protected function addNewLineAtEnd( $wikitext ) {
+		return ( new TextboxBuilder() )->addNewLineAtEnd( $wikitext );
+	}
+
+	/**
+	 * Turns section name wikitext into anchors for use in HTTP redirects. Various
+	 * versions of Microsoft browsers misinterpret fragment encoding of Location: headers
+	 * resulting in mojibake in address bar. Redirect them to legacy section IDs,
+	 * if possible. All the other browsers get HTML5 if the wiki is configured for it, to
+	 * spread the new style links more efficiently.
+	 *
+	 * @param string $text
+	 * @return string
+	 */
+	private function guessSectionName( $text ) {
+		global $wgParser;
+
+		// Detect Microsoft browsers
+		$userAgent = $this->context->getRequest()->getHeader( 'User-Agent' );
+		if ( $userAgent && preg_match( '/MSIE|Edge/', $userAgent ) ) {
+			// ...and redirect them to legacy encoding, if available
+			return $wgParser->guessLegacySectionNameFromWikiText( $text );
+		}
+		// Meanwhile, real browsers get real anchors
+		$name = $wgParser->guessSectionNameFromWikiText( $text );
+		// With one little caveat: per T216029, fragments in HTTP redirects need to be urlencoded,
+		// otherwise Chrome double-escapes the rest of the URL.
+		return '#' . urlencode( mb_substr( $name, 1 ) );
+	}
+
+	/**
+	 * Set a factory function to create an EditConflictHelper
+	 *
+	 * @param callable $factory Factory function
+	 * @since 1.31
+	 */
+	public function setEditConflictHelperFactory( callable $factory ) {
+		$this->editConflictHelperFactory = $factory;
+		$this->editConflictHelper = null;
+	}
+
+	/**
+	 * @return TextConflictHelper
+	 */
+	private function getEditConflictHelper() {
+		if ( !$this->editConflictHelper ) {
+			$this->editConflictHelper = call_user_func(
+				$this->editConflictHelperFactory,
+				$this->getSubmitButtonLabel()
+			);
+		}
+
+		return $this->editConflictHelper;
+	}
+
+	/**
+	 * @param string $submitButtonLabel
+	 * @return TextConflictHelper
+	 */
+	private function newTextConflictHelper( $submitButtonLabel ) {
+		return new TextConflictHelper(
+			$this->getTitle(),
+			$this->getContext()->getOutput(),
+			MediaWikiServices::getInstance()->getStatsdDataFactory(),
+			$submitButtonLabel
+		);
+	}
+}