X-Git-Url: http://git.heureux-cyclage.org/?a=blobdiff_plain;f=includes%2FEditPage.php;h=8f4761ca7f81c81cd1f23369dac7eae031e349e4;hb=2a642ad44a223fe76f61cd6cca822edabb497f71;hp=a14871e21d52abe0227069f706a588e1857c7f6c;hpb=73085da1b1af9f0d2f9664b2f793755c6e1144c3;p=lhc%2Fweb%2Fwiklou.git

diff --git a/includes/EditPage.php b/includes/EditPage.php
index a14871e21d..8f4761ca7f 100644
--- a/includes/EditPage.php
+++ b/includes/EditPage.php
@@ -15,31 +15,133 @@
  * 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 {
+
+	/**
+	 * 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: The filter function set in $wgFilterCallback returned true (= block it)
+	 */
 	const AS_FILTERING                 = 211;
+
+	/**
+	 * Status: A hook function returned an error
+	 */
 	const AS_HOOK_ERROR_EXPECTED       = 212;
+
+	/**
+	 * Status: User is blocked from editting this page
+	 */
 	const AS_BLOCKED_PAGE_FOR_USER     = 215;
+
+	/**
+	 * Status: Content too big (> $wgMaxArticleSize)
+	 */
 	const AS_CONTENT_TOO_BIG           = 216;
+
+	/**
+	 * Status: User cannot edit? (not used)
+	 */
 	const AS_USER_CANNOT_EDIT          = 217;
+
+	/**
+	 * 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 editting 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
+	 */
 	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
+	 * editting 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;
+
+	/**
+	 * not used
+	 */
 	const AS_OK                        = 230;
+
+	/**
+	 * Status: WikiPage::doEdit() was unsuccessfull
+	 */
 	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;
 
 	/**
@@ -52,7 +154,7 @@ class EditPage {
 	 */
 	var $mTitle;
 	private $mContextTitle = null;
-	var $action;
+	var $action = 'submit';
 	var $isConflict = false;
 	var $isCssJsSubpage = false;
 	var $isCssSubpage = false;
@@ -81,6 +183,12 @@ class EditPage {
 	 */
 	var $mParserOutput;
 
+	/**
+	 * Has a summary been preset using GET parameter &summary= ?
+	 * @var Bool
+	 */
+	var $hasPresetSummary = false;
+
 	var $mBaseRevision = false;
 	var $mShowSummaryField = true;
 
@@ -88,20 +196,20 @@ class EditPage {
 	var $save = false, $preview = false, $diff = false;
 	var $minoredit = false, $watchthis = false, $recreate = false;
 	var $textbox1 = '', $textbox2 = '', $summary = '', $nosummary = false;
-	var $edittime = '', $section = '', $starttime = '';
+	var $edittime = '', $section = '', $sectiontitle = '', $starttime = '';
 	var $oldid = 0, $editintro = '', $scrolltop = null, $bot = true;
 
 	# Placeholders for text injection by hooks (must be HTML)
 	# extensions should take care to _append_ to the present value
-	public $editFormPageTop; // Before even the preview
-	public $editFormTextTop;
-	public $editFormTextBeforeContent;
-	public $editFormTextAfterWarn;
-	public $editFormTextAfterTools;
-	public $editFormTextBottom;
-	public $editFormTextAfterContent;
-	public $previewTextAfterContent;
-	public $mPreloadText;
+	public $editFormPageTop = ''; // Before even the preview
+	public $editFormTextTop = '';
+	public $editFormTextBeforeContent = '';
+	public $editFormTextAfterWarn = '';
+	public $editFormTextAfterTools = '';
+	public $editFormTextBottom = '';
+	public $editFormTextAfterContent = '';
+	public $previewTextAfterContent = '';
+	public $mPreloadText = '';
 
 	/* $didSave should be set to true whenever an article was succesfully altered. */
 	public $didSave = false;
@@ -110,33 +218,28 @@ class EditPage {
 	public $suppressIntro = false;
 
 	/**
-	 * @todo document
 	 * @param $article Article
 	 */
-	function __construct( $article ) {
-		$this->mArticle =& $article;
+	public function __construct( Article $article ) {
+		$this->mArticle = $article;
 		$this->mTitle = $article->getTitle();
-		$this->action = 'submit';
-
-		# Placeholders for text injection by hooks (empty per default)
-		$this->editFormPageTop =
-		$this->editFormTextTop =
-		$this->editFormTextBeforeContent =
-		$this->editFormTextAfterWarn =
-		$this->editFormTextAfterTools =
-		$this->editFormTextBottom =
-		$this->editFormTextAfterContent =
-		$this->previewTextAfterContent =
-		$this->mPreloadText = "";
 	}
 
 	/**
 	 * @return Article
 	 */
-	function getArticle() {
+	public function getArticle() {
 		return $this->mArticle;
 	}
 
+	/**
+	 * @since 1.19
+	 * @return Title
+	 */
+	public function getTitle() {
+		return $this->mTitle;
+	}
+
 	/**
 	 * Set the context Title object
 	 *
@@ -162,193 +265,6 @@ class EditPage {
 		}
 	}
 
-	/**
-	 * Fetch initial editing page content.
-	 *
-	 * @param $def_text string
-	 * @returns mixed string on success, $def_text for invalid sections
-	 * @private
-	 */
-	function getContent( $def_text = '' ) {
-		global $wgOut, $wgRequest, $wgParser;
-
-		wfProfileIn( __METHOD__ );
-		# Get variables from query string :P
-		$section = $wgRequest->getVal( 'section' );
-
-		$preload = $wgRequest->getVal( 'preload',
-			// Custom preload text for new sections
-			$section === 'new' ? 'MediaWiki:addsection-preload' : '' );
-		$undoafter = $wgRequest->getVal( 'undoafter' );
-		$undo = $wgRequest->getVal( 'undo' );
-
-		// For message page not locally set, use the i18n message.
-		// For other non-existent articles, use preload text if any.
-		if ( !$this->mTitle->exists() ) {
-			if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
-				# If this is a system message, get the default text.
-				$text = $this->mTitle->getDefaultMessageText();
-				if( $text === false ) {
-					$text = $this->getPreloadedText( $preload );
-				}
-			} else {
-				# If requested, preload some text.
-				$text = $this->getPreloadedText( $preload );
-			}
-		// For existing pages, get text based on "undo" or section parameters.
-		} else {
-			$text = $this->mArticle->getContent();
-			if ( $undo > 0 && $undoafter > 0 && $undo < $undoafter ) {
-				# If they got undoafter and undo round the wrong way, switch them
-				list( $undo, $undoafter ) = array( $undoafter, $undo );
-			}
-			if ( $undo > 0 && $undo > $undoafter ) {
-				# Undoing a specific edit overrides section editing; section-editing
-				# doesn't work with undoing.
-				if ( $undoafter ) {
-					$undorev = Revision::newFromId( $undo );
-					$oldrev = Revision::newFromId( $undoafter );
-				} else {
-					$undorev = Revision::newFromId( $undo );
-					$oldrev = $undorev ? $undorev->getPrevious() : null;
-				}
-
-				# Sanity check, make sure it's the right page,
-				# the revisions exist and they were not deleted.
-				# Otherwise, $text will be left as-is.
-				if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
-					$undorev->getPage() == $oldrev->getPage() &&
-					$undorev->getPage() == $this->mArticle->getID() &&
-					!$undorev->isDeleted( Revision::DELETED_TEXT ) &&
-					!$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
-
-					$undotext = $this->mArticle->getUndoText( $undorev, $oldrev );
-					if ( $undotext === false ) {
-						# Warn the user that something went wrong
-						$this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-failure">' . wfMsgNoTrans( 'undo-failure' ) . '</div>' );
-					} else {
-						$text = $undotext;
-						# Inform the user of our success and set an automatic edit summary
-						$this->editFormPageTop .= $wgOut->parse( '<div class="mw-undo-success">' . wfMsgNoTrans( 'undo-success' ) . '</div>' );
-						$firstrev = $oldrev->getNext();
-						# If we just undid one rev, use an autosummary
-						if ( $firstrev->mId == $undo ) {
-							$this->summary = wfMsgForContent( 'undo-summary', $undo, $undorev->getUserText() );
-							$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.
-					$this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-norev">' . wfMsgNoTrans( 'undo-norev' ) . '</div>' );
-				}
-			} elseif ( $section != '' ) {
-				if ( $section == 'new' ) {
-					$text = $this->getPreloadedText( $preload );
-				} else {
-					// Get section edit text (returns $def_text for invalid sections)
-					$text = $wgParser->getSection( $text, $section, $def_text );
-				}
-			}
-		}
-
-		wfProfileOut( __METHOD__ );
-		return $text;
-	}
-
-	/**
-	 * Use this method before edit() to preload some text into the edit box
-	 *
-	 * @param $text string
-	 */
-	public function setPreloadedText( $text ) {
-		$this->mPreloadText = $text;
-	}
-
-	/**
-	 * Get the contents to be preloaded into the box, either set by
-	 * an earlier setPreloadText() or by loading the given page.
-	 *
-	 * @param $preload String: representing the title to preload from.
-	 * @return String
-	 */
-	protected function getPreloadedText( $preload ) {
-		global $wgUser, $wgParser;
-		if ( !empty( $this->mPreloadText ) ) {
-			return $this->mPreloadText;
-		} elseif ( $preload !== '' ) {
-			$title = Title::newFromText( $preload );
-			# Check for existence to avoid getting MediaWiki:Noarticletext
-			if ( isset( $title ) && $title->exists() && $title->userCanRead() ) {
-				$article = new Article( $title );
-
-				if ( $article->isRedirect() ) {
-					$title = Title::newFromRedirectRecurse( $article->getContent() );
-					# Redirects to missing titles are displayed, to hidden pages are followed
-					# Copying observed behaviour from ?action=view
-					if ( $title->exists() ) {
-						if ($title->userCanRead() ) {
-							$article = new Article( $title );
-						} else {
-							return "";
-						}
-					}
-				}
-				$parserOptions = ParserOptions::newFromUser( $wgUser );
-				return $wgParser->getPreloadText( $article->getContent(), $title, $parserOptions );
-			}
-		}
-		return '';
-	}
-
-	/**
-	 * 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.
-	 */
-	protected function wasDeletedSinceLastEdit() {
-		if ( $this->deletedSinceEdit !== null ) {
-			return $this->deletedSinceEdit;
-		}
-
-		$this->deletedSinceEdit = false;
-
-		if ( $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;
-	}
-
-	/**
-	 * Checks whether the user entered a skin name in uppercase,
-	 * e.g. "User:Example/Monobook.css" instead of "monobook.css"
-	 *
-	 * @return bool
-	 */
-	protected function isWrongCaseCssJsPage() {
-		if( $this->mTitle->isCssJsSubpage() ) {
-			$name = $this->mTitle->getSkinFromCssJsSubpage();
-			$skins = array_merge(
-				array_keys( Skin::getSkinNames() ),
-				array( 'common' )
-			);
-			return !in_array( $name, $skins )
-				&& in_array( strtolower( $name ), $skins );
-		} else {
-			return false;
-		}
-	}
-
 	function submit() {
 		$this->edit();
 	}
@@ -372,7 +288,14 @@ class EditPage {
 		}
 
 		wfProfileIn( __METHOD__ );
-		wfDebug( __METHOD__.": enter\n" );
+		wfDebug( __METHOD__ . ": enter\n" );
+
+		// If they used redlink=1 and the page exists, redirect to the main article
+		if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
+			$wgOut->redirect( $this->mTitle->getFullURL() );
+			wfProfileOut( __METHOD__ );
+			return;
+		}
 
 		$this->importFormData( $wgRequest );
 		$this->firsttime = false;
@@ -389,45 +312,34 @@ class EditPage {
 			$this->preview = true;
 		}
 
-		$wgOut->addModules( array( 'mediawiki.action.edit' ) );
-
-		if ( $wgUser->getOption( 'uselivepreview', false ) ) {
-			$wgOut->addModules( 'mediawiki.legacy.preview' );
+		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';
+			}
 		}
-		// Bug #19334: textarea jumps when editing articles in IE8
-		$wgOut->addStyle( 'common/IE80Fixes.css', 'screen', 'IE 8' );
 
 		$permErrors = $this->getEditPermissionErrors();
 		if ( $permErrors ) {
 			wfDebug( __METHOD__ . ": User can't edit\n" );
-			$content = $this->getContent( null );
-			$content = $content === '' ? null : $content;
-			$this->readOnlyPage( $content, true, $permErrors, 'edit' );
+			// Auto-block user's IP if the account was "hard" blocked
+			$wgUser->spreadAnyEditBlock();
+
+			$this->displayPermissionsError( $permErrors );
+
 			wfProfileOut( __METHOD__ );
 			return;
-		} else {
-			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';
-				}
-			}
-		}
-
-		// If they used redlink=1 and the page exists, redirect to the main article
-		if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
-			$wgOut->redirect( $this->mTitle->getFullURL() );
 		}
 
-		wfProfileIn( __METHOD__."-business-end" );
+		wfProfileIn( __METHOD__ . "-business-end" );
 
 		$this->isConflict = false;
 		// css / js subpages of user pages get a special treatment
@@ -438,29 +350,8 @@ class EditPage {
 		$this->isNew                = !$this->mTitle->exists() || $this->section == 'new';
 
 		# Show applicable editing introductions
-		if ( $this->formtype == 'initial' || $this->firsttime )
+		if ( $this->formtype == 'initial' || $this->firsttime ) {
 			$this->showIntro();
-
-		if ( $this->mTitle->isTalkPage() ) {
-			$wgOut->addWikiMsg( 'talkpagetext' );
-		}
-
-		# Optional notices on a per-namespace and per-page basis
-		$editnotice_ns   = 'editnotice-'.$this->mTitle->getNamespace();
-		$editnotice_ns_message = wfMessage( $editnotice_ns )->inContentLanguage();
-		if ( $editnotice_ns_message->exists() ) {
-			$wgOut->addWikiText( $editnotice_ns_message->plain() );
-		}
-		if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
-			$parts = explode( '/', $this->mTitle->getDBkey() );
-			$editnotice_base = $editnotice_ns;
-			while ( count( $parts ) > 0 ) {
-				$editnotice_base .= '-'.array_shift( $parts );
-				$editnotice_base_msg = wfMessage( $editnotice_base )->inContentLanguage();
-				if ( $editnotice_base_msg->exists() ) {
-					$wgOut->addWikiText( $editnotice_base_msg->plain()  );
-				}
-			}
 		}
 
 		# Attempt submission here.  This will check for edit conflicts,
@@ -470,7 +361,7 @@ class EditPage {
 
 		if ( 'save' == $this->formtype ) {
 			if ( !$this->attemptSave() ) {
-				wfProfileOut( __METHOD__."-business-end" );
+				wfProfileOut( __METHOD__ . "-business-end" );
 				wfProfileOut( __METHOD__ );
 				return;
 			}
@@ -481,18 +372,18 @@ class EditPage {
 		if ( 'initial' == $this->formtype || $this->firsttime ) {
 			if ( $this->initialiseForm() === false ) {
 				$this->noSuchSectionPage();
-				wfProfileOut( __METHOD__."-business-end" );
+				wfProfileOut( __METHOD__ . "-business-end" );
 				wfProfileOut( __METHOD__ );
 				return;
 			}
-			if ( !$this->mTitle->getArticleId() )
+			if ( !$this->mTitle->getArticleID() )
 				wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 			else
 				wfRunHooks( 'EditFormInitialText', array( $this ) );
 		}
 
 		$this->showEditForm();
-		wfProfileOut( __METHOD__."-business-end" );
+		wfProfileOut( __METHOD__ . "-business-end" );
 		wfProfileOut( __METHOD__ );
 	}
 
@@ -509,7 +400,7 @@ class EditPage {
 		}
 		# Ignore some permissions errors when a user is just previewing/viewing diffs
 		$remove = array();
-		foreach( $permErrors as $error ) {
+		foreach ( $permErrors as $error ) {
 			if ( ( $this->preview || $this->diff ) &&
 				( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' ) )
 			{
@@ -521,24 +412,83 @@ class EditPage {
 	}
 
 	/**
-	 * Show a read-only error
-	 * Parameters are the same as OutputPage:readOnlyPage()
-	 * Redirect to the article page if redlink=1
+	 * 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 $permErrors Array of permissions errors, as returned by
+	 *                    Title::getUserPermissionsErrors().
 	 */
-	function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
+	protected function displayPermissionsError( array $permErrors ) {
 		global $wgRequest, $wgOut;
+
 		if ( $wgRequest->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.
 			$wgOut->redirect( $this->mTitle->getFullUrl() );
-		} else {
-			$wgOut->readOnlyPage( $source, $protected, $reasons, $action );
+			return;
 		}
-	}
 
-	/**
-	 * Should we show a preview when the edit form is first shown?
+		$content = $this->getContent();
+
+		# Use the normal message if there's nothing to display
+		if ( $this->firsttime && $content === '' ) {
+			$action = $this->mTitle->exists() ? 'edit' :
+				( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
+			throw new PermissionsError( $action, $permErrors );
+		}
+
+		$wgOut->setPageTitle( wfMessage( 'viewsource-title', $this->getContextTitle()->getPrefixedText() ) );
+		$wgOut->addBacklinkSubtitle( $this->getContextTitle() );
+		$wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
+		$wgOut->addHTML( "<hr />\n" );
+
+		# If the user made changes, preserve them when showing the markup
+		# (This happens when a user is blocked during edit, for instance)
+		if ( !$this->firsttime ) {
+			$content = $this->textbox1;
+			$wgOut->addWikiMsg( 'viewyourtext' );
+		} else {
+			$wgOut->addWikiMsg( 'viewsourcetext' );
+		}
+
+		$this->showTextbox( $content, 'wpTextbox1', array( 'readonly' ) );
+
+		$wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
+			Linker::formatTemplates( $this->getTemplates() ) ) );
+
+		if ( $this->mTitle->exists() ) {
+			$wgOut->returnToMain( null, $this->mTitle );
+		}
+	}
+
+	/**
+	 * Show a read-only error
+	 * Parameters are the same as OutputPage:readOnlyPage()
+	 * Redirect to the article page if redlink=1
+	 * @deprecated in 1.19; use displayPermissionsError() instead
+	 */
+	function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
+		wfDeprecated( __METHOD__, '1.19' );
+
+		global $wgRequest, $wgOut;
+		if ( $wgRequest->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.
+			$wgOut->redirect( $this->mTitle->getFullUrl() );
+		} else {
+			$wgOut->readOnlyPage( $source, $protected, $reasons, $action );
+		}
+	}
+
+	/**
+	 * Should we show a preview when the edit form is first shown?
 	 *
 	 * @return bool
 	 */
@@ -557,7 +507,7 @@ class EditPage {
 			// Standard preference behaviour
 			return true;
 		} elseif ( !$this->mTitle->exists() &&
-		  isset($wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]) &&
+		  isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] ) &&
 		  $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 		{
 			// Categories are special
@@ -568,30 +518,37 @@ class EditPage {
 	}
 
 	/**
-	 * Does this EditPage class support section editing?
-	 * This is used by EditPage subclasses to indicate their ui cannot handle section edits
+	 * Checks whether the user entered a skin name in uppercase,
+	 * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 	 *
 	 * @return bool
 	 */
-	protected function isSectionEditSupported() {
-		return true;
+	protected function isWrongCaseCssJsPage() {
+		if ( $this->mTitle->isCssJsSubpage() ) {
+			$name = $this->mTitle->getSkinFromCssJsSubpage();
+			$skins = array_merge(
+				array_keys( Skin::getSkinNames() ),
+				array( 'common' )
+			);
+			return !in_array( $name, $skins )
+				&& in_array( strtolower( $name ), $skins );
+		} else {
+			return false;
+		}
 	}
 
 	/**
-	 * 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.
+	 * Does this EditPage class support section editing?
+	 * This is used by EditPage subclasses to indicate their ui cannot handle section edits
 	 *
-	 * @param $title Title object for which is being edited (where we go to for &action= links)
-	 * @return string
+	 * @return bool
 	 */
-	protected function getActionURL( Title $title ) {
-		return $title->getLocalURL( array( 'action' => $this->action ) );
+	protected function isSectionEditSupported() {
+		return true;
 	}
 
 	/**
-	 * @todo document
+	 * This function collects the form data and uses it to populate various member variables.
 	 * @param $request WebRequest
 	 */
 	function importFormData( &$request ) {
@@ -607,29 +564,39 @@ class EditPage {
 			# Also remove trailing whitespace, but don't remove _initial_
 			# whitespace from the text boxes. This may be significant formatting.
 			$this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
-			if ( !$request->getCheck('wpTextbox2') ) {
+			if ( !$request->getCheck( 'wpTextbox2' ) ) {
 				// Skip this if wpTextbox2 has input, it indicates that we came
 				// from a conflict page with raw page text, not a custom form
 				// modified by subclasses
-				wfProfileIn( get_class($this)."::importContentFormData" );
+				wfProfileIn( get_class( $this ) . "::importContentFormData" );
 				$textbox1 = $this->importContentFormData( $request );
-				if ( isset($textbox1) )
+				if ( isset( $textbox1 ) )
 					$this->textbox1 = $textbox1;
-				wfProfileOut( get_class($this)."::importContentFormData" );
+				wfProfileOut( get_class( $this ) . "::importContentFormData" );
 			}
 
 			# Truncate for whole multibyte characters. +5 bytes for ellipsis
 			$this->summary = $wgLang->truncate( $request->getText( 'wpSummary' ), 250 );
 
-			# Remove extra headings from summaries and new sections.
-			$this->summary = preg_replace('/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary);
+			# 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 = $wgLang->truncate( $request->getText( 'wpSectionTitle' ), 250 );
+			$this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 
 			$this->edittime = $request->getVal( 'wpEdittime' );
 			$this->starttime = $request->getVal( 'wpStarttime' );
 
 			$this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 
-			if ($this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null) {
+			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)
@@ -689,30 +656,38 @@ class EditPage {
 			{
 				$this->allowBlankSummary = true;
 			} else {
-				$this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary');
+				$this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary' );
 			}
 
 			$this->autoSumm = $request->getText( 'wpAutoSummary' );
 		} else {
 			# Not a posted form? Start with nothing.
 			wfDebug( __METHOD__ . ": Not a posted form.\n" );
-			$this->textbox1  = '';
-			$this->summary   = '';
-			$this->edittime  = '';
-			$this->starttime = wfTimestampNow();
-			$this->edit      = false;
-			$this->preview   = false;
-			$this->save      = false;
-			$this->diff      = false;
-			$this->minoredit = false;
-			$this->watchthis = $request->getBool( 'watchthis', false ); // Watch may be overriden by request parameters
-			$this->recreate  = false;
-
+			$this->textbox1     = '';
+			$this->summary      = '';
+			$this->sectiontitle = '';
+			$this->edittime     = '';
+			$this->starttime    = wfTimestampNow();
+			$this->edit         = false;
+			$this->preview      = false;
+			$this->save         = false;
+			$this->diff         = false;
+			$this->minoredit    = false;
+			$this->watchthis    = $request->getBool( 'watchthis', false ); // Watch may be overriden by request parameters
+			$this->recreate     = false;
+
+			// When creating a new section, we can preload a section title by passing it as the
+			// preloadtitle parameter in the URL (Bug 13100)
 			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' ) ) {
@@ -723,7 +698,6 @@ class EditPage {
 		$this->bot = $request->getBool( 'bot', true );
 		$this->nosummary = $request->getBool( 'nosummary' );
 
-		// @todo FIXME: Unused variable?
 		$this->oldid = $request->getInt( 'oldid' );
 
 		$this->live = $request->getCheck( 'live' );
@@ -750,213 +724,466 @@ class EditPage {
 	}
 
 	/**
-	 * Make sure the form isn't faking a user's credentials.
-	 *
-	 * @param $request WebRequest
-	 * @return bool
-	 * @private
+	 * Initialise form fields in the object
+	 * Called on the first invocation, e.g. when a user clicks an edit link
+	 * @return bool -- if the requested section is valid
 	 */
-	function tokenOk( &$request ) {
+	function initialiseForm() {
 		global $wgUser;
-		$token = $request->getVal( 'wpEditToken' );
-		$this->mTokenOk = $wgUser->matchEditToken( $token );
-		$this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
-		return $this->mTokenOk;
+		$this->edittime = $this->mArticle->getTimestamp();
+		$this->textbox1 = $this->getContent( false );
+		// activate checkboxes if user wants them to be always active
+		# Sort out the "watch" checkbox
+		if ( $wgUser->getOption( 'watchdefault' ) ) {
+			# Watch all edits
+			$this->watchthis = true;
+		} elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
+			# Watch creations
+			$this->watchthis = true;
+		} elseif ( $this->mTitle->userIsWatching() ) {
+			# Already watched
+			$this->watchthis = true;
+		}
+		if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
+			$this->minoredit = true;
+		}
+		if ( $this->textbox1 === false ) {
+			return false;
+		}
+		wfProxyCheck();
+		return true;
 	}
 
 	/**
-	 * Show all applicable editing introductions
+	 * Fetch initial editing page content.
+	 *
+	 * @param $def_text string
+	 * @return mixed string on success, $def_text for invalid sections
+	 * @private
 	 */
-	protected function showIntro() {
-		global $wgOut, $wgUser;
-		if ( $this->suppressIntro ) {
-			return;
-		}
+	function getContent( $def_text = '' ) {
+		global $wgOut, $wgRequest, $wgParser;
 
-		$namespace = $this->mTitle->getNamespace();
+		wfProfileIn( __METHOD__ );
 
-		if ( $namespace == NS_MEDIAWIKI ) {
-			# Show a warning if editing an interface message
-			$wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
-		}
+		$text = false;
 
-		# 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 ) {
-			$parts = explode( '/', $this->mTitle->getText(), 2 );
-			$username = $parts[0];
-			$user = User::newFromName( $username, false /* allow IP users*/ );
-			$ip = User::isIP( $username );
-			if ( !$user->isLoggedIn() && !$ip ) { # User does not exist
-				$wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
-					array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
-			} elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
-				LogEventsList::showLogExtract(
-					$wgOut,
-					'block',
-					$user->getUserPage()->getPrefixedText(),
-					'',
-					array(
-						'lim' => 1,
-						'showIfEmpty' => false,
-						'msgKey' => array(
-							'blocked-notice-logextract',
-							$user->getName() # Support GENDER in notice
-						)
-					)
-				);
+		// For message page not locally set, use the i18n message.
+		// For other non-existent articles, use preload text if any.
+		if ( !$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.
+				$text = $this->mTitle->getDefaultMessageText();
 			}
-		}
-		# Try to add a custom edit intro, or use the standard one if this is not possible.
-		if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
-			if ( $wgUser->isLoggedIn() ) {
-				$wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
+			if ( $text === false ) {
+				# If requested, preload some text.
+				$preload = $wgRequest->getVal( 'preload',
+					// Custom preload text for new sections
+					$this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
+				$text = $this->getPreloadedText( $preload );
+			}
+		// 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)
+				$text = $wgParser->getSection( $this->getOriginalContent(), $this->section, $def_text );
 			} else {
-				$wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
+				$undoafter = $wgRequest->getInt( 'undoafter' );
+				$undo = $wgRequest->getInt( 'undo' );
+
+				if ( $undo > 0 && $undoafter > 0 ) {
+					if ( $undo < $undoafter ) {
+						# If they got undoafter and undo round the wrong way, switch them
+						list( $undo, $undoafter ) = array( $undoafter, $undo );
+					}
+
+					$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, $text will be left as-is.
+					if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
+						$undorev->getPage() == $oldrev->getPage() &&
+						$undorev->getPage() == $this->mTitle->getArticleID() &&
+						!$undorev->isDeleted( Revision::DELETED_TEXT ) &&
+						!$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
+
+						$text = $this->mArticle->getUndoText( $undorev, $oldrev );
+						if ( $text === false ) {
+							# Warn the user that something went wrong
+							$undoMsg = 'failure';
+						} 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->getId() == $undo ) {
+								$undoSummary = wfMsgForContent( 'undo-summary', $undo, $undorev->getUserText() );
+								if ( $this->summary === '' ) {
+									$this->summary = $undoSummary;
+								} else {
+									$this->summary = $undoSummary . wfMsgForContent( 'colon-separator' ) . $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';
+					}
+
+					$class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
+					$this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
+						wfMsgNoTrans( 'undo-' . $undoMsg ) . '</div>', true, /* interface */true );
+				}
+
+				if ( $text === false ) {
+					$text = $this->getOriginalContent();
+				}
 			}
 		}
-		# Give a notice if the user is editing a deleted/moved page...
-		if ( !$this->mTitle->exists() ) {
-			LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle->getPrefixedText(),
-				'', array( 'lim' => 10,
-					   'conds' => array( "log_action != 'revision'" ),
-					   'showIfEmpty' => false,
-					   'msgKey' => array( 'recreate-moveddeleted-warn') )
-			);
+
+		wfProfileOut( __METHOD__ );
+		return $text;
+	}
+
+	/**
+	 * 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::replaceSection())
+	 * to the original text of the edit.
+	 *
+	 * This difers from Article::getContent() that when a missing revision is
+	 * encountered the result will be an empty string and not the
+	 * 'missing-article' message.
+	 *
+	 * @since 1.19
+	 * @return string
+	 */
+	private function getOriginalContent() {
+		if ( $this->section == 'new' ) {
+			return $this->getCurrentText();
 		}
+		$revision = $this->mArticle->getRevisionFetched();
+		if ( $revision === null ) {
+			return '';
+		}
+		return $this->mArticle->getContent();
 	}
 
 	/**
-	 * Attempt to show a custom editing introduction, if supplied
+	 * Get the actual text of the page. This is basically similar to
+	 * WikiPage::getRawText() except that when the page doesn't exist an empty
+	 * string is returned instead of false.
 	 *
-	 * @return bool
+	 * @since 1.19
+	 * @return string
 	 */
-	protected function showCustomIntro() {
-		if ( $this->editintro ) {
-			$title = Title::newFromText( $this->editintro );
-			if ( $title instanceof Title && $title->exists() && $title->userCanRead() ) {
-				global $wgOut;
-				// Added using template syntax, to take <noinclude>'s into account.
-				$wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
-				return true;
-			} else {
-				return false;
-			}
+	private function getCurrentText() {
+		$text = $this->mArticle->getRawText();
+		if ( $text === false ) {
+			return '';
 		} else {
-			return false;
+			return $text;
 		}
 	}
 
 	/**
-	 * Attempt submission (no UI)
-	 *
-	 * @param $result
-	 * @param $bot bool
+	 * Use this method before edit() to preload some text into the edit box
 	 *
-	 * @return int one of the constants describing the result
+	 * @param $text string
 	 */
-	function internalAttemptSave( &$result, $bot = false ) {
-		global $wgFilterCallback, $wgUser, $wgParser;
-		global $wgMaxArticleSize;
+	public function setPreloadedText( $text ) {
+		$this->mPreloadText = $text;
+	}
 
-		wfProfileIn( __METHOD__  );
-		wfProfileIn( __METHOD__ . '-checks' );
+	/**
+	 * Get the contents to be preloaded into the box, either set by
+	 * an earlier setPreloadText() or by loading the given page.
+	 *
+	 * @param $preload String: representing the title to preload from.
+	 * @return String
+	 */
+	protected function getPreloadedText( $preload ) {
+		global $wgUser, $wgParser;
 
-		if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
-			wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
-			wfProfileOut( __METHOD__ . '-checks' );
-			wfProfileOut( __METHOD__  );
-			return self::AS_HOOK_ERROR;
+		if ( !empty( $this->mPreloadText ) ) {
+			return $this->mPreloadText;
 		}
 
-		# Check image redirect
-		if ( $this->mTitle->getNamespace() == NS_FILE &&
-			Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
-			!$wgUser->isAllowed( 'upload' ) ) {
-				$isAnon = $wgUser->isAnon();
-
-				wfProfileOut( __METHOD__ . '-checks' );
-				wfProfileOut( __METHOD__  );
-
-				return $isAnon ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
+		if ( $preload === '' ) {
+			return '';
 		}
 
-		# Check for spam
-		$match = self::matchSummarySpamRegex( $this->summary );
-		if ( $match === false ) {
-			$match = self::matchSpamRegex( $this->textbox1 );
+		$title = Title::newFromText( $preload );
+		# Check for existence to avoid getting MediaWiki:Noarticletext
+		if ( $title === null || !$title->exists() || !$title->userCan( 'read' ) ) {
+			return '';
 		}
-		if ( $match !== false ) {
-			$result['spam'] = $match;
-			$ip = wfGetIP();
-			$pdbk = $this->mTitle->getPrefixedDBkey();
-			$match = str_replace( "\n", '', $match );
-			wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
-			wfProfileOut( __METHOD__ . '-checks' );
-			wfProfileOut( __METHOD__ );
-			return self::AS_SPAM_ERROR;
+
+		$page = WikiPage::factory( $title );
+		if ( $page->isRedirect() ) {
+			$title = $page->getRedirectTarget();
+			# Same as before
+			if ( $title === null || !$title->exists() || !$title->userCan( 'read' ) ) {
+				return '';
+			}
+			$page = WikiPage::factory( $title );
 		}
-		if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
+
+		$parserOptions = ParserOptions::newFromUser( $wgUser );
+		return $wgParser->getPreloadText( $page->getRawText(), $title, $parserOptions );
+	}
+
+	/**
+	 * Make sure the form isn't faking a user's credentials.
+	 *
+	 * @param $request WebRequest
+	 * @return bool
+	 * @private
+	 */
+	function tokenOk( &$request ) {
+		global $wgUser;
+		$token = $request->getVal( 'wpEditToken' );
+		$this->mTokenOk = $wgUser->matchEditToken( $token );
+		$this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
+		return $this->mTokenOk;
+	}
+
+	/**
+	 * Attempt submission
+	 * @return bool false if output is done, true if the rest of the form should be displayed
+	 */
+	function attemptSave() {
+		global $wgUser, $wgOut;
+
+		$resultDetails = false;
+		# Allow bots to exempt some edits from bot flagging
+		$bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
+		$status = $this->internalAttemptSave( $resultDetails, $bot );
+		// 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->didSave = true;
+		}
+
+		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:
+				return true;
+
+			case self::AS_HOOK_ERROR:
+			case self::AS_FILTERING:
+				return false;
+
+			case self::AS_SUCCESS_NEW_ARTICLE:
+				$query = $resultDetails['redirect'] ? 'redirect=no' : '';
+				$anchor = isset ( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
+				$wgOut->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
+				wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this->mArticle, &$sectionanchor, &$extraQuery ) );
+
+				if ( $resultDetails['redirect'] ) {
+					if ( $extraQuery == '' ) {
+						$extraQuery = 'redirect=no';
+					} else {
+						$extraQuery = 'redirect=no&' . $extraQuery;
+					}
+				}
+				$wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
+				return false;
+
+			case self::AS_BLANK_ARTICLE:
+				$wgOut->redirect( $this->getContextTitle()->getFullURL() );
+				return false;
+
+			case self::AS_SPAM_ERROR:
+				$this->spamPageWithContent( $resultDetails['spam'] );
+				return false;
+
+			case self::AS_BLOCKED_PAGE_FOR_USER:
+				throw new UserBlockedError( $wgUser->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 );
+
+		}
+		return false;
+	}
+
+	/**
+	 * Attempt submission (no UI)
+	 *
+	 * @param $result
+	 * @param $bot bool
+	 *
+	 * @return Status object, possibly with a message, but always with one of the AS_* constants in $status->value,
+	 *
+	 * FIXME: This interface is TERRIBLE, but hard to get rid of due to various error display idiosyncrasies. There are
+	 * also lots of cases where error metadata is set in the object and retrieved later instead of being returned, e.g.
+	 * AS_CONTENT_TOO_BIG and AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some time.
+	 */
+	function internalAttemptSave( &$result, $bot = false ) {
+		global $wgFilterCallback, $wgUser, $wgRequest, $wgParser;
+		global $wgMaxArticleSize;
+
+		$status = Status::newGood();
+
+		wfProfileIn( __METHOD__  );
+		wfProfileIn( __METHOD__ . '-checks' );
+
+		if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
+			wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
+			$status->fatal( 'hookaborted' );
+			$status->value = self::AS_HOOK_ERROR;
+			wfProfileOut( __METHOD__ . '-checks' );
+			wfProfileOut( __METHOD__  );
+			return $status;
+		}
+
+		# Check image redirect
+		if ( $this->mTitle->getNamespace() == NS_FILE &&
+			Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
+			!$wgUser->isAllowed( 'upload' ) ) {
+				$code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
+				$status->setResult( false, $code );
+
+				wfProfileOut( __METHOD__ . '-checks' );
+				wfProfileOut( __METHOD__  );
+
+				return $status;
+		}
+
+		# Check for spam
+		$match = self::matchSummarySpamRegex( $this->summary );
+		if ( $match === false ) {
+			$match = self::matchSpamRegex( $this->textbox1 );
+		}
+		if ( $match !== false ) {
+			$result['spam'] = $match;
+			$ip = $wgRequest->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;
+			wfProfileOut( __METHOD__ . '-checks' );
+			wfProfileOut( __METHOD__ );
+			return $status;
+		}
+		if ( $wgFilterCallback && is_callable( $wgFilterCallback ) && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
 			# Error messages or other handling should be performed by the filter function
+			$status->setResult( false, self::AS_FILTERING );
 			wfProfileOut( __METHOD__ . '-checks' );
 			wfProfileOut( __METHOD__ );
-			return self::AS_FILTERING;
+			return $status;
 		}
 		if ( !wfRunHooks( 'EditFilter', array( $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;
 			wfProfileOut( __METHOD__ . '-checks' );
 			wfProfileOut( __METHOD__ );
-			return 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;
 			wfProfileOut( __METHOD__ . '-checks' );
 			wfProfileOut( __METHOD__ );
-			return self::AS_HOOK_ERROR_EXPECTED;
+			return $status;
 		}
+
 		if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
+			// Auto-block user's IP if the account was "hard" blocked
+			$wgUser->spreadAnyEditBlock();
 			# Check block state against master, thus 'false'.
+			$status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
 			wfProfileOut( __METHOD__ . '-checks' );
 			wfProfileOut( __METHOD__ );
-			return self::AS_BLOCKED_PAGE_FOR_USER;
+			return $status;
 		}
+
 		$this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
 		if ( $this->kblength > $wgMaxArticleSize ) {
 			// Error will be displayed by showEditForm()
 			$this->tooBig = true;
+			$status->setResult( false, self::AS_CONTENT_TOO_BIG );
 			wfProfileOut( __METHOD__ . '-checks' );
 			wfProfileOut( __METHOD__ );
-			return self::AS_CONTENT_TOO_BIG;
+			return $status;
 		}
 
 		if ( !$wgUser->isAllowed( 'edit' ) ) {
 			if ( $wgUser->isAnon() ) {
+				$status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
 				wfProfileOut( __METHOD__ . '-checks' );
 				wfProfileOut( __METHOD__ );
-				return self::AS_READ_ONLY_PAGE_ANON;
+				return $status;
 			} else {
+				$status->fatal( 'readonlytext' );
+				$status->value = self::AS_READ_ONLY_PAGE_LOGGED;
 				wfProfileOut( __METHOD__ . '-checks' );
 				wfProfileOut( __METHOD__ );
-				return self::AS_READ_ONLY_PAGE_LOGGED;
+				return $status;
 			}
 		}
 
 		if ( wfReadOnly() ) {
+			$status->fatal( 'readonlytext' );
+			$status->value = self::AS_READ_ONLY_PAGE;
 			wfProfileOut( __METHOD__ . '-checks' );
 			wfProfileOut( __METHOD__ );
-			return self::AS_READ_ONLY_PAGE;
+			return $status;
 		}
 		if ( $wgUser->pingLimiter() ) {
+			$status->fatal( 'actionthrottledtext' );
+			$status->value = self::AS_RATE_LIMITED;
 			wfProfileOut( __METHOD__ . '-checks' );
 			wfProfileOut( __METHOD__ );
-			return 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 );
 			wfProfileOut( __METHOD__ . '-checks' );
 			wfProfileOut( __METHOD__ );
-			return self::AS_ARTICLE_WAS_DELETED;
+			return $status;
 		}
 
 		wfProfileOut( __METHOD__ . '-checks' );
@@ -968,53 +1195,77 @@ class EditPage {
 		if ( $new ) {
 			// Late check for create permission, just in case *PARANOIA*
 			if ( !$this->mTitle->userCan( 'create' ) ) {
+				$status->fatal( 'nocreatetext' );
+				$status->value = self::AS_NO_CREATE_PERMISSION;
 				wfDebug( __METHOD__ . ": no create permission\n" );
 				wfProfileOut( __METHOD__ );
-				return self::AS_NO_CREATE_PERMISSION;
+				return $status;
 			}
 
 			# Don't save a new article if it's blank.
 			if ( $this->textbox1 == '' ) {
+				$status->setResult( false, self::AS_BLANK_ARTICLE );
 				wfProfileOut( __METHOD__ );
-				return self::AS_BLANK_ARTICLE;
+				return $status;
 			}
 
 			// Run post-section-merge edit filter
 			if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
 				# Error messages etc. could be handled within the hook...
+				$status->fatal( 'hookaborted' );
+				$status->value = self::AS_HOOK_ERROR;
 				wfProfileOut( __METHOD__ );
-				return self::AS_HOOK_ERROR;
+				return $status;
 			} elseif ( $this->hookError != '' ) {
 				# ...or the hook could be expecting us to produce an error
+				$status->fatal( 'hookaborted' );
+				$status->value = self::AS_HOOK_ERROR_EXPECTED;
 				wfProfileOut( __METHOD__ );
-				return self::AS_HOOK_ERROR_EXPECTED;
-			}
-
-			# Handle the user preference to force summaries here. Check if it's not a redirect.
-			if ( !$this->allowBlankSummary && !Title::newFromRedirect( $this->textbox1 ) ) {
-				if ( md5( $this->summary ) == $this->autoSumm ) {
-					$this->missingSummary = true;
-					wfProfileOut( __METHOD__ );
-					return self::AS_SUMMARY_NEEDED;
-				}
+				return $status;
 			}
 
 			$text = $this->textbox1;
-			if ( $this->section == 'new' && $this->summary != '' ) {
-				$text = wfMsgForContent( 'newsectionheaderdefaultlevel', $this->summary ) . "\n\n" . $text;
+			$result['sectionanchor'] = '';
+			if ( $this->section == 'new' ) {
+				if ( $this->sectiontitle !== '' ) {
+					// Insert the section title above the content.
+					$text = wfMsgForContent( 'newsectionheaderdefaultlevel', $this->sectiontitle ) . "\n\n" . $text;
+
+					// Jump to the new section
+					$result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $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 );
+						$this->summary = wfMsgForContent( 'newsectionsummary', $cleanSectionTitle );
+					}
+				} elseif ( $this->summary !== '' ) {
+					// Insert the section title above the content.
+					$text = wfMsgForContent( 'newsectionheaderdefaultlevel', $this->summary ) . "\n\n" . $text;
+
+					// Jump to the new section
+					$result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
+
+					// Create a link to the new section from the edit summary.
+					$cleanSummary = $wgParser->stripSectionName( $this->summary );
+					$this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
+				}
 			}
 
-			$retval = self::AS_SUCCESS_NEW_ARTICLE;
+			$status->value = self::AS_SUCCESS_NEW_ARTICLE;
 
 		} else {
 
 			# Article exists. Check for edit conflict.
 
 			$this->mArticle->clear(); # Force reload of dates, etc.
+			$timestamp = $this->mArticle->getTimestamp();
 
-			wfDebug( "timestamp: {$this->mArticle->getTimestamp()}, edittime: {$this->edittime}\n" );
+			wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
 
-			if ( $this->mArticle->getTimestamp() != $this->edittime ) {
+			if ( $timestamp != $this->edittime ) {
 				$this->isConflict = true;
 				if ( $this->section == 'new' ) {
 					if ( $this->mArticle->getUserText() == $wgUser->getName() &&
@@ -1026,7 +1277,7 @@ class EditPage {
 					} else {
 						// New comment; suppress conflict.
 						$this->isConflict = false;
-						wfDebug( __METHOD__ .": conflict suppressed; new section\n" );
+						wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
 					}
 				} elseif ( $this->section == '' && $this->userWasLastToEdit( $wgUser->getId(), $this->edittime ) ) {
 					# Suppress edit conflict with self, except for section edits where merging is required.
@@ -1035,13 +1286,20 @@ class EditPage {
 				}
 			}
 
+			// If sectiontitle is set, use it, otherwise use the summary as the section title (for
+			// backwards compatibility with old forms/bots).
+			if ( $this->sectiontitle !== '' ) {
+				$sectionTitle = $this->sectiontitle;
+			} else {
+				$sectionTitle = $this->summary;
+			}
+
 			if ( $this->isConflict ) {
-				wfDebug( __METHOD__ . ": conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
-					$this->mArticle->getTimestamp() . "')\n" );
-				$text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime );
+				wfDebug( __METHOD__ . ": conflict! getting section '$this->section' for time '$this->edittime' (article time '{$timestamp}')\n" );
+				$text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $sectionTitle, $this->edittime );
 			} else {
 				wfDebug( __METHOD__ . ": getting section '$this->section'\n" );
-				$text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary );
+				$text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $sectionTitle );
 			}
 			if ( is_null( $text ) ) {
 				wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
@@ -1061,30 +1319,37 @@ class EditPage {
 			}
 
 			if ( $this->isConflict ) {
+				$status->setResult( false, self::AS_CONFLICT_DETECTED );
 				wfProfileOut( __METHOD__ );
-				return self::AS_CONFLICT_DETECTED;
+				return $status;
 			}
 
 			// Run post-section-merge edit filter
 			if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError, $this->summary ) ) ) {
 				# Error messages etc. could be handled within the hook...
+				$status->fatal( 'hookaborted' );
+				$status->value = self::AS_HOOK_ERROR;
 				wfProfileOut( __METHOD__ );
-				return 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;
 				wfProfileOut( __METHOD__ );
-				return self::AS_HOOK_ERROR_EXPECTED;
+				return $status;
 			}
 
 			# Handle the user preference to force summaries here, but not for null edits
 			if ( $this->section != 'new' && !$this->allowBlankSummary
-				&& 0 != strcmp( $this->mArticle->getContent(), $text )
+				&& $this->getOriginalContent() != $text
 				&& !Title::newFromRedirect( $text ) ) # check if it's not a redirect
 			{
 				if ( md5( $this->summary ) == $this->autoSumm ) {
 					$this->missingSummary = true;
+					$status->fatal( 'missingsummary' );
+					$status->value = self::AS_SUMMARY_NEEDED;
 					wfProfileOut( __METHOD__ );
-					return self::AS_SUMMARY_NEEDED;
+					return $status;
 				}
 			}
 
@@ -1092,8 +1357,10 @@ class EditPage {
 			if ( $this->section == 'new' && !$this->allowBlankSummary ) {
 				if ( trim( $this->summary ) == '' ) {
 					$this->missingSummary = true;
+					$status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
+					$status->value = self::AS_SUMMARY_NEEDED;
 					wfProfileOut( __METHOD__ );
-					return self::AS_SUMMARY_NEEDED;
+					return $status;
 				}
 			}
 
@@ -1103,11 +1370,22 @@ class EditPage {
 			if ( $this->section == 'new' ) {
 				if ( $this->textbox1 == '' ) {
 					$this->missingComment = true;
+					$status->fatal( 'missingcommenttext' );
+					$status->value = self::AS_TEXTBOX_EMPTY;
 					wfProfileOut( __METHOD__ . '-sectionanchor' );
 					wfProfileOut( __METHOD__ );
-					return self::AS_TEXTBOX_EMPTY;
+					return $status;
 				}
-				if ( $this->summary != '' ) {
+				if ( $this->sectiontitle !== '' ) {
+					$sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $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 );
+						$this->summary = wfMsgForContent( 'newsectionsummary', $cleanSectionTitle );
+					}
+				} elseif ( $this->summary !== '' ) {
 					$sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
 					# This is a new section, so create a link to the new section
 					# in the revision summary.
@@ -1135,15 +1413,16 @@ class EditPage {
 			$this->textbox1 = $text;
 			$this->section = '';
 
-			$retval = self::AS_SUCCESS_UPDATE;
+			$status->value = self::AS_SUCCESS_UPDATE;
 		}
 
 		// Check for length errors again now that the section is merged in
 		$this->kblength = (int)( strlen( $text ) / 1024 );
 		if ( $this->kblength > $wgMaxArticleSize ) {
 			$this->tooBig = true;
+			$status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
 			wfProfileOut( __METHOD__ );
-			return self::AS_MAX_ARTICLE_SIZE_EXCEEDED;
+			return $status;
 		}
 
 		$flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
@@ -1151,17 +1430,18 @@ class EditPage {
 			( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
 			( $bot ? EDIT_FORCE_BOT : 0 );
 
-		$status = $this->mArticle->doEdit( $text, $this->summary, $flags );
+		$doEditStatus = $this->mArticle->doEdit( $text, $this->summary, $flags );
 
-		if ( $status->isOK() ) {
+		if ( $doEditStatus->isOK() ) {
 			$result['redirect'] = Title::newFromRedirect( $text ) !== null;
 			$this->commitWatch();
 			wfProfileOut( __METHOD__ );
-			return $retval;
+			return $status;
 		} else {
 			$this->isConflict = true;
+			$doEditStatus->value = self::AS_END; // Destroys data doEdit() put in $status->value but who cares
 			wfProfileOut( __METHOD__ );
-			return self::AS_END;
+			return $doEditStatus;
 		}
 	}
 
@@ -1172,13 +1452,13 @@ class EditPage {
 		global $wgUser;
 		if ( $this->watchthis xor $this->mTitle->userIsWatching() ) {
 			$dbw = wfGetDB( DB_MASTER );
-			$dbw->begin();
+			$dbw->begin( __METHOD__ );
 			if ( $this->watchthis ) {
 				WatchAction::doWatch( $this->mTitle, $wgUser );
 			} else {
 				WatchAction::doUnwatch( $this->mTitle, $wgUser );
 			}
-			$dbw->commit();
+			$dbw->commit( __METHOD__ );
 		}
 	}
 
@@ -1193,30 +1473,84 @@ class EditPage {
 	 * @return bool
 	 */
 	protected function userWasLastToEdit( $id, $edittime ) {
-		if( !$id ) return false;
+		if ( !$id ) return false;
 		$dbw = wfGetDB( DB_MASTER );
 		$res = $dbw->select( 'revision',
 			'rev_user',
 			array(
-				'rev_page' => $this->mArticle->getId(),
-				'rev_timestamp > '.$dbw->addQuotes( $dbw->timestamp($edittime) )
+				'rev_page' => $this->mTitle->getArticleID(),
+				'rev_timestamp > ' . $dbw->addQuotes( $dbw->timestamp( $edittime ) )
 			),
 			__METHOD__,
 			array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
 		foreach ( $res as $row ) {
-			if( $row->rev_user != $id ) {
+			if ( $row->rev_user != $id ) {
 				return false;
 			}
 		}
 		return true;
 	}
 
+	/**
+	 * @private
+	 * @todo document
+	 *
+	 * @parma $editText string
+	 *
+	 * @return bool
+	 */
+	function mergeChangesInto( &$editText ) {
+		wfProfileIn( __METHOD__ );
+
+		$db = wfGetDB( DB_MASTER );
+
+		// This is the revision the editor started from
+		$baseRevision = $this->getBaseRevision();
+		if ( is_null( $baseRevision ) ) {
+			wfProfileOut( __METHOD__ );
+			return false;
+		}
+		$baseText = $baseRevision->getText();
+
+		// The current state, we want to merge updates into it
+		$currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
+		if ( is_null( $currentRevision ) ) {
+			wfProfileOut( __METHOD__ );
+			return false;
+		}
+		$currentText = $currentRevision->getText();
+
+		$result = '';
+		if ( wfMerge( $baseText, $editText, $currentText, $result ) ) {
+			$editText = $result;
+			wfProfileOut( __METHOD__ );
+			return true;
+		} else {
+			wfProfileOut( __METHOD__ );
+			return false;
+		}
+	}
+
+	/**
+	 * @return Revision
+	 */
+	function getBaseRevision() {
+		if ( !$this->mBaseRevision ) {
+			$db = wfGetDB( DB_MASTER );
+			$baseRevision = Revision::loadFromTimestamp(
+				$db, $this->mTitle, $this->edittime );
+			return $this->mBaseRevision = $baseRevision;
+		} else {
+			return $this->mBaseRevision;
+		}
+	}
+
 	/**
 	 * Check given input text against $wgSpamRegex, and return the text of the first match.
 	 *
 	 * @param $text string
 	 *
-	 * @return string|false matching string or false
+	 * @return string|bool matching string or false
 	 */
 	public static function matchSpamRegex( $text ) {
 		global $wgSpamRegex;
@@ -1230,7 +1564,7 @@ class EditPage {
 	 *
 	 * @parma $text string
 	 *
-	 * @return string|false  matching string or false
+	 * @return string|bool  matching string or false
 	 */
 	public static function matchSummarySpamRegex( $text ) {
 		global $wgSummarySpamRegex;
@@ -1244,57 +1578,36 @@ class EditPage {
 	 * @return bool|string
 	 */
 	protected static function matchSpamRegexInternal( $text, $regexes ) {
-		foreach( $regexes as $regex ) {
+		foreach ( $regexes as $regex ) {
 			$matches = array();
-			if( preg_match( $regex, $text, $matches ) ) {
+			if ( preg_match( $regex, $text, $matches ) ) {
 				return $matches[0];
 			}
 		}
 		return false;
 	}
 
-	/**
-	 * 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
-	 */
-	function initialiseForm() {
-		global $wgUser;
-		$this->edittime = $this->mArticle->getTimestamp();
-		$this->textbox1 = $this->getContent( false );
-		// activate checkboxes if user wants them to be always active
-		# Sort out the "watch" checkbox
-		if ( $wgUser->getOption( 'watchdefault' ) ) {
-			# Watch all edits
-			$this->watchthis = true;
-		} elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
-			# Watch creations
-			$this->watchthis = true;
-		} elseif ( $this->mTitle->userIsWatching() ) {
-			# Already watched
-			$this->watchthis = true;
-		}
-		if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
-			$this->minoredit = true;
-		}
-		if ( $this->textbox1 === false ) {
-			return false;
+	function setHeaders() {
+		global $wgOut, $wgUser;
+
+		$wgOut->addModules( 'mediawiki.action.edit' );
+
+		if ( $wgUser->getOption( 'uselivepreview', false ) ) {
+			$wgOut->addModules( 'mediawiki.legacy.preview' );
 		}
-		wfProxyCheck();
-		return true;
-	}
+		// Bug #19334: textarea jumps when editing articles in IE8
+		$wgOut->addStyle( 'common/IE80Fixes.css', 'screen', 'IE 8' );
 
-	function setHeaders() {
-		global $wgOut;
 		$wgOut->setRobotPolicy( 'noindex,nofollow' );
-		if ( $this->formtype == 'preview' ) {
-			$wgOut->setPageTitleActionText( wfMsg( 'preview' ) );
-		}
+
+		# Enabled article-related sidebar, toplinks, etc.
+		$wgOut->setArticleRelated( true );
+
 		if ( $this->isConflict ) {
-			$wgOut->setPageTitle( wfMsg( 'editconflict', $this->getContextTitle()->getPrefixedText() ) );
+			$wgOut->setPageTitle( wfMessage( 'editconflict', $this->getContextTitle()->getPrefixedText() ) );
 		} elseif ( $this->section != '' ) {
 			$msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
-			$wgOut->setPageTitle( wfMsg( $msg, $this->getContextTitle()->getPrefixedText() ) );
+			$wgOut->setPageTitle( wfMessage( $msg, $this->getContextTitle()->getPrefixedText() ) );
 		} else {
 			# Use the title defined by DISPLAYTITLE magic word when present
 			if ( isset( $this->mParserOutput )
@@ -1303,12 +1616,95 @@ class EditPage {
 			} else {
 				$title = $this->getContextTitle()->getPrefixedText();
 			}
-			$wgOut->setPageTitle( wfMsg( 'editing', $title ) );
+			$wgOut->setPageTitle( wfMessage( 'editing', $title ) );
 		}
 	}
 
 	/**
-	 * Send the edit form and related headers to $wgOut
+	 * Show all applicable editing introductions
+	 */
+	protected function showIntro() {
+		global $wgOut, $wgUser;
+		if ( $this->suppressIntro ) {
+			return;
+		}
+
+		$namespace = $this->mTitle->getNamespace();
+
+		if ( $namespace == NS_MEDIAWIKI ) {
+			# Show a warning if editing an interface message
+			$wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
+		}
+
+		# 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 ) {
+			$parts = explode( '/', $this->mTitle->getText(), 2 );
+			$username = $parts[0];
+			$user = User::newFromName( $username, false /* allow IP users*/ );
+			$ip = User::isIP( $username );
+			if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
+				$wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
+					array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
+			} elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
+				LogEventsList::showLogExtract(
+					$wgOut,
+					'block',
+					$user->getUserPage(),
+					'',
+					array(
+						'lim' => 1,
+						'showIfEmpty' => false,
+						'msgKey' => array(
+							'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() ) {
+			if ( $wgUser->isLoggedIn() ) {
+				$wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
+			} else {
+				$wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
+			}
+		}
+		# Give a notice if the user is editing a deleted/moved page...
+		if ( !$this->mTitle->exists() ) {
+			LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
+				'', array( 'lim' => 10,
+					   'conds' => array( "log_action != 'revision'" ),
+					   'showIfEmpty' => false,
+					   'msgKey' => array( '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' ) ) {
+				global $wgOut;
+				// Added using template syntax, to take <noinclude>'s into account.
+				$wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
+				return true;
+			} else {
+				return false;
+			}
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 * Send the edit form and related headers to $wgOut
 	 * @param $formCallback Callback that takes an OutputPage parameter; will be called
 	 *     during form output near the top, for captchas and the like.
 	 */
@@ -1317,37 +1713,24 @@ class EditPage {
 
 		wfProfileIn( __METHOD__ );
 
-		#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
+		# 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();
 		}
 
-		wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) );
+		wfRunHooks( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
 
 		$this->setHeaders();
 
-		# Enabled article-related sidebar, toplinks, etc.
-		$wgOut->setArticleRelated( true );
-
 		if ( $this->showHeader() === false ) {
 			wfProfileOut( __METHOD__ );
 			return;
 		}
 
-		$action = htmlspecialchars( $this->getActionURL( $this->getContextTitle() ) );
-
-		if ( $wgUser->getOption( 'showtoolbar' ) and !$this->isCssJsSubpage ) {
-			# prepare toolbar for edit buttons
-			$toolbar = EditPage::getEditToolbar();
-		} else {
-			$toolbar = '';
-		}
-
-
 		$wgOut->addHTML( $this->editFormPageTop );
 
 		if ( $wgUser->getOption( 'previewontop' ) ) {
@@ -1356,26 +1739,21 @@ class EditPage {
 
 		$wgOut->addHTML( $this->editFormTextTop );
 
-		$templates = $this->getTemplates();
-		$formattedtemplates = Linker::formatTemplates( $templates, $this->preview, $this->section != '');
-
-		$hiddencats = $this->mArticle->getHiddenCategories();
-		$formattedhiddencats = Linker::formatHiddenCategories( $hiddencats );
-
-		if ( $this->wasDeletedSinceLastEdit() && 'save' != $this->formtype ) {
-			$wgOut->wrapWikiMsg(
-				"<div class='error mw-deleted-while-editing'>\n$1\n</div>",
-				'deletedwhileediting' );
-		} elseif ( $this->wasDeletedSinceLastEdit() ) {
-			// Hide the toolbar and edit area, user can click preview to get it back
-			// Add an confirmation checkbox and explanation.
-			$toolbar = '';
-			// @todo move this to a cleaner conditional instead of blanking a variable
+		$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 {
+				$wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
+					'deletedwhileediting' );
+			}
 		}
-		$wgOut->addHTML( <<<HTML
-<form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
-HTML
-);
+
+		$wgOut->addHTML( Html::openElement( 'form', array( 'id' => 'editform', 'name' => 'editform',
+			'method' => 'post', 'action' => $this->getActionURL( $this->getContextTitle() ),
+			'enctype' => 'multipart/form-data' ) ) );
 
 		if ( is_callable( $formCallback ) ) {
 			call_user_func_array( $formCallback, array( &$wgOut ) );
@@ -1412,13 +1790,21 @@ HTML
 		#####
 		# 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 ) )
-				$wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
+		if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
+			$wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
+		}
+
+		if ( $this->hasPresetSummary ) {
+			// If a summary has been preset using &summary= we dont want to prompt for
+			// a different summary. Only prompt for a summary if the summary is blanked.
+			// (Bug 17416)
+			$this->autoSumm = md5( '' );
+		}
+
 		$autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
 		$wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
 
-		$wgOut->addHTML( Html::hidden( 'oldid', $this->mArticle->getOldID() ) );
+		$wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
 
 		if ( $this->section == 'new' ) {
 			$this->showSummaryInput( true, $this->summary );
@@ -1427,14 +1813,19 @@ HTML
 
 		$wgOut->addHTML( $this->editFormTextBeforeContent );
 
-		$wgOut->addHTML( $toolbar );
+		if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
+			$wgOut->addHTML( EditPage::getEditToolbar() );
+		}
 
 		if ( $this->isConflict ) {
 			// In an edit conflict bypass the overrideable 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.
-			$this->showTextbox1( null, $this->getContent() );
+			$this->textbox2 = $this->textbox1;
+			$this->textbox1 = $this->getCurrentText();
+
+			$this->showTextbox1();
 		} else {
 			$this->showContentForm();
 		}
@@ -1442,32 +1833,31 @@ HTML
 		$wgOut->addHTML( $this->editFormTextAfterContent );
 
 		$wgOut->addWikiText( $this->getCopywarn() );
-		if ( isset($this->editFormTextAfterWarn) && $this->editFormTextAfterWarn !== '' )
-			$wgOut->addHTML( $this->editFormTextAfterWarn );
+
+		$wgOut->addHTML( $this->editFormTextAfterWarn );
 
 		$this->showStandardInputs();
 
 		$this->showFormAfterText();
 
 		$this->showTosSummary();
+
 		$this->showEditTools();
 
-		$wgOut->addHTML( <<<HTML
-{$this->editFormTextAfterTools}
-<div class='templatesUsed'>
-{$formattedtemplates}
-</div>
-<div class='hiddencats'>
-{$formattedhiddencats}
-</div>
-HTML
-);
+		$wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
+
+		$wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
+			Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
+
+		$wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
+			Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
 
-		if ( $this->isConflict )
+		if ( $this->isConflict ) {
 			$this->showConflict();
+		}
+
+		$wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
 
-		$wgOut->addHTML( $this->editFormTextBottom );
-		$wgOut->addHTML( "</form>\n" );
 		if ( !$wgUser->getOption( 'previewontop' ) ) {
 			$this->displayPreviewArea( $previewOutput, false );
 		}
@@ -1475,8 +1865,54 @@ HTML
 		wfProfileOut( __METHOD__ );
 	}
 
+	/**
+	 * Extract the section title from current section text, if any.
+	 *
+	 * @param string $text
+	 * @return Mixed|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() {
 		global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
+
+		if ( $this->mTitle->isTalkPage() ) {
+			$wgOut->addWikiMsg( 'talkpagetext' );
+		}
+
+		# Optional notices on a per-namespace and per-page basis
+		$editnotice_ns = 'editnotice-' . $this->mTitle->getNamespace();
+		$editnotice_ns_message = wfMessage( $editnotice_ns )->inContentLanguage();
+		if ( $editnotice_ns_message->exists() ) {
+			$wgOut->addWikiText( $editnotice_ns_message->plain() );
+		}
+		if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
+			$parts = explode( '/', $this->mTitle->getDBkey() );
+			$editnotice_base = $editnotice_ns;
+			while ( count( $parts ) > 0 ) {
+				$editnotice_base .= '-' . array_shift( $parts );
+				$editnotice_base_msg = wfMessage( $editnotice_base )->inContentLanguage();
+				if ( $editnotice_base_msg->exists() ) {
+					$wgOut->addWikiText( $editnotice_base_msg->plain() );
+				}
+			}
+		} else {
+			# Even if there are no subpages in namespace, we still don't want / in MW ns.
+			$editnoticeText = $editnotice_ns . '-' . str_replace( '/', '-', $this->mTitle->getDBkey() );
+			$editnoticeMsg = wfMessage( $editnoticeText )->inContentLanguage();
+			if ( $editnoticeMsg->exists() ) {
+				$wgOut->addWikiText( $editnoticeMsg->plain() );
+			}
+		}
+
 		if ( $this->isConflict ) {
 			$wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
 			$this->edittime = $this->mArticle->getTimestamp();
@@ -1490,14 +1926,10 @@ HTML
 			}
 
 			if ( $this->section != '' && $this->section != 'new' ) {
-				$matches = array();
 				if ( !$this->summary && !$this->preview && !$this->diff ) {
-					preg_match( "/^(=+)(.+)\\1/mi", $this->textbox1, $matches );
-					if ( !empty( $matches[2] ) ) {
-						global $wgParser;
-						$this->summary = "/* " .
-							$wgParser->stripSectionName(trim($matches[2])) .
-							" */ ";
+					$sectionTitle = self::extractSectionTitle( $this->textbox1 );
+					if ( $sectionTitle !== false ) {
+						$this->summary = "/* $sectionTitle */ ";
 					}
 				}
 			}
@@ -1522,18 +1954,27 @@ HTML
 				$wgOut->addWikiMsg( 'nonunicodebrowser' );
 			}
 
-			if ( isset( $this->mArticle ) && isset( $this->mArticle->mRevision ) ) {
-			// Let sysop know that this will make private content public if saved
+			if ( $this->section != 'new' ) {
+				$revision = $this->mArticle->getRevisionFetched();
+				if ( $revision ) {
+					// Let sysop know that this will make private content public if saved
 
-				if ( !$this->mArticle->mRevision->userCan( Revision::DELETED_TEXT ) ) {
-					$wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
-				} elseif ( $this->mArticle->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
-					$wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
-				}
+					if ( !$revision->userCan( Revision::DELETED_TEXT ) ) {
+						$wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
+					} elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
+						$wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
+					}
 
-				if ( !$this->mArticle->mRevision->isCurrent() ) {
-					$this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
-					$wgOut->addWikiMsg( 'editingold' );
+					if ( !$revision->isCurrent() ) {
+						$this->mArticle->setOldSubtitle( $revision->getId() );
+						$wgOut->addWikiMsg( 'editingold' );
+					}
+				} elseif ( $this->mTitle->exists() ) {
+					// Something went wrong
+
+					$wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
+						array( 'missing-article', $this->mTitle->getPrefixedText(),
+						wfMsgNoTrans( 'missingarticle-rev', $this->oldid ) ) );
 				}
 			}
 		}
@@ -1550,7 +1991,7 @@ HTML
 			if ( $this->isCssJsSubpage ) {
 				# Check the skin exists
 				if ( $this->isWrongCaseCssJsPage ) {
-					$wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $this->getContextTitle()->getSkinFromCssJsSubpage() ) );
+					$wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
 				}
 				if ( $this->formtype !== 'preview' ) {
 					if ( $this->isCssSubpage )
@@ -1569,17 +2010,17 @@ HTML
 				# Then it must be protected based on static groups (regular)
 				$noticeMsg = 'protectedpagewarning';
 			}
-			LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle->getPrefixedText(), '',
+			LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
 				array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
 		}
 		if ( $this->mTitle->isCascadeProtected() ) {
 			# Is this page under cascading protection from some source pages?
-			list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
+			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 ) {
+				foreach ( $cascadeSources as $page ) {
 					$notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
 				}
 			}
@@ -1587,8 +2028,8 @@ HTML
 			$wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
 		}
 		if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
-			LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle->getPrefixedText(), '',
-				array(  'lim' => 1,
+			LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
+				array( 'lim' => 1,
 					'showIfEmpty' => false,
 					'msgKey' => array( 'titleprotectedwarning' ),
 					'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
@@ -1602,7 +2043,7 @@ HTML
 			$wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
 				array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
 		} else {
-			if( !wfMessage('longpage-hint')->isDisabled() ) {
+			if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
 				$wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
 					array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
 				);
@@ -1624,9 +2065,9 @@ HTML
 	 *
 	 * @return array An array in the format array( $label, $input )
 	 */
-	function getSummaryInput($summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null) {
-		//Note: the maxlength is overriden in JS to 250 and to make it use UTF-8 bytes, not characters.
-		$inputAttrs = ( is_array($inputAttrs) ? $inputAttrs : array() ) + array(
+	function getSummaryInput( $summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null ) {
+		// Note: the maxlength is overriden in JS to 250 and to make it use UTF-8 bytes, not characters.
+		$inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
 			'id' => 'wpSummary',
 			'maxlength' => '200',
 			'tabindex' => '1',
@@ -1634,7 +2075,7 @@ HTML
 			'spellcheck' => 'true',
 		) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
 
-		$spanLabelAttrs = ( is_array($spanLabelAttrs) ? $spanLabelAttrs : array() ) + array(
+		$spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
 			'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
 			'id' => "wpSummaryLabel"
 		);
@@ -1672,8 +2113,8 @@ HTML
 		}
 		$summary = $wgContLang->recodeForEdit( $summary );
 		$labelText = wfMsgExt( $isSubjectPreview ? 'subject' : 'summary', 'parseinline' );
-		list($label, $input) = $this->getSummaryInput($summary, $labelText, array( 'class' => $summaryClass ), array());
-		$wgOut->addHTML("{$label} {$input}");
+		list( $label, $input ) = $this->getSummaryInput( $summary, $labelText, array( 'class' => $summaryClass ), array() );
+		$wgOut->addHTML( "{$label} {$input}" );
 	}
 
 	/**
@@ -1710,7 +2151,7 @@ HTML
 HTML
 		);
 		if ( !$this->checkUnicodeCompliantBrowser() )
-			$wgOut->addHTML(Html::hidden( 'safemode', '1' ));
+			$wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
 	}
 
 	protected function showFormAfterText() {
@@ -1727,7 +2168,7 @@ HTML
 		 * include the constant suffix to prevent editing from
 		 * broken text-mangling proxies.
 		 */
-		$wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->editToken() ) . "\n" );
+		$wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
 	}
 
 	/**
@@ -1747,37 +2188,43 @@ HTML
 	 * The $textoverride method can be used by subclasses overriding showContentForm
 	 * to pass back to this method.
 	 *
-	 * @param $customAttribs An array of html attributes to use in the textarea
+	 * @param $customAttribs array of html attributes to use in the textarea
 	 * @param $textoverride String: optional text to override $this->textarea1 with
 	 */
-	protected function showTextbox1($customAttribs = null, $textoverride = null) {
-		$classes = array(); // Textarea CSS
-		if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
-			# Is the title semi-protected?
-			if ( $this->mTitle->isSemiProtected() ) {
-				$classes[] = 'mw-textarea-sprotected';
-			} else {
-				# Then it must be protected based on static groups (regular)
-				$classes[] = 'mw-textarea-protected';
+	protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
+		if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
+			$attribs = array( 'style' => 'display:none;' );
+		} else {
+			$classes = array(); // Textarea CSS
+			if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
+				# Is the title semi-protected?
+				if ( $this->mTitle->isSemiProtected() ) {
+					$classes[] = 'mw-textarea-sprotected';
+				} else {
+					# Then it must be protected based on static groups (regular)
+					$classes[] = 'mw-textarea-protected';
+				}
+				# Is the title cascade-protected?
+				if ( $this->mTitle->isCascadeProtected() ) {
+					$classes[] = 'mw-textarea-cprotected';
+				}
 			}
-			# Is the title cascade-protected?
-			if ( $this->mTitle->isCascadeProtected() ) {
-				$classes[] = 'mw-textarea-cprotected';
+
+			$attribs = array( 'tabindex' => 1 );
+
+			if ( is_array( $customAttribs ) ) {
+				$attribs += $customAttribs;
 			}
-		}
-		$attribs = array( 'tabindex' => 1 );
-		if ( is_array($customAttribs) )
-			$attribs += $customAttribs;
 
-		if ( $this->wasDeletedSinceLastEdit() )
-			$attribs['type'] = 'hidden';
-		if ( !empty( $classes ) ) {
-			if ( isset($attribs['class']) )
-				$classes[] = $attribs['class'];
-			$attribs['class'] = implode( ' ', $classes );
+			if ( count( $classes ) ) {
+				if ( isset( $attribs['class'] ) ) {
+					$classes[] = $attribs['class'];
+				}
+				$attribs['class'] = implode( ' ', $classes );
+			}
 		}
 
-		$this->showTextbox( isset($textoverride) ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
+		$this->showTextbox( $textoverride !== null ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
 	}
 
 	protected function showTextbox2() {
@@ -1788,7 +2235,7 @@ HTML
 		global $wgOut, $wgUser;
 
 		$wikitext = $this->safeUnicodeOutput( $content );
-		if ( $wikitext !== '' ) {
+		if ( strval( $wikitext ) !== '' ) {
 			// Ensure there's a newline at the end, otherwise adding lines
 			// is awkward.
 			// But don't add a newline if the ext is empty, or Firefox in XHTML
@@ -1830,7 +2277,7 @@ HTML
 
 		$wgOut->addHTML( '</div>' );
 
-		if ( $this->formtype == 'diff') {
+		if ( $this->formtype == 'diff' ) {
 			$this->showDiff();
 		}
 	}
@@ -1843,18 +2290,52 @@ HTML
 	 */
 	protected function showPreview( $text ) {
 		global $wgOut;
-		if ( $this->mTitle->getNamespace() == NS_CATEGORY) {
+		if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
 			$this->mArticle->openShowCategory();
 		}
 		# This hook seems slightly odd here, but makes things more
 		# consistent for extensions.
-		wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
+		wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
 		$wgOut->addHTML( $text );
 		if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
 			$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.
+	 */
+	function showDiff() {
+		global $wgUser, $wgContLang, $wgParser, $wgOut;
+
+		$oldtext = $this->mArticle->getRawText();
+		$newtext = $this->mArticle->replaceSection(
+			$this->section, $this->textbox1, $this->summary, $this->edittime );
+
+		wfRunHooks( 'EditPageGetDiffText', array( $this, &$newtext ) );
+
+		$popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
+		$newtext = $wgParser->preSaveTransform( $newtext, $this->mTitle, $wgUser, $popts );
+
+		if ( $oldtext !== false  || $newtext != '' ) {
+			$oldtitle = wfMsgExt( 'currentrev', array( 'parseinline' ) );
+			$newtitle = wfMsgExt( 'yourtext', array( 'parseinline' ) );
+
+			$de = new DifferenceEngine( $this->mArticle->getContext() );
+			$de->setText( $oldtext, $newtext );
+			$difftext = $de->getDiff( $oldtitle, $newtitle );
+			$de->showDiffStyle();
+		} else {
+			$difftext = '';
+		}
+
+		$wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
+	}
+
 	/**
 	 * Give a chance for site and per-namespace customizations of
 	 * terms of service summary link that might exist separately
@@ -1866,7 +2347,7 @@ HTML
 	protected function showTosSummary() {
 		$msg = 'editpage-tos-summary';
 		wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
-		if( !wfMessage( $msg )->isDisabled() ) {
+		if ( !wfMessage( $msg )->isDisabled() ) {
 			global $wgOut;
 			$wgOut->addHTML( '<div class="mw-tos-summary">' );
 			$wgOut->addWikiMsg( $msg );
@@ -1895,7 +2376,7 @@ HTML
 		wfRunHooks( 'EditPageCopyrightWarning', array( $this->mTitle, &$copywarnMsg ) );
 
 		return "<div id=\"editpage-copywarn\">\n" .
-			call_user_func_array("wfMsgNoTrans", $copywarnMsg) . "\n</div>";
+			call_user_func_array( "wfMsgNoTrans", $copywarnMsg ) . "\n</div>";
 	}
 
 	protected function showStandardInputs( &$tabindex = 2 ) {
@@ -1918,8 +2399,8 @@ HTML
 			$cancel .= wfMsgExt( 'pipe-separator' , 'escapenoentities' );
 		}
 		$edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ) );
-		$edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
-			htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
+		$edithelp = '<a target="helpwindow" href="' . $edithelpurl . '">' .
+			htmlspecialchars( wfMsg( 'edithelp' ) ) . '</a> ' .
 			htmlspecialchars( wfMsg( 'newwindow' ) );
 		$wgOut->addHTML( "	<span class='editHelp'>{$cancel}{$edithelp}</span>\n" );
 		$wgOut->addHTML( "</div><!-- editButtons -->\n</div><!-- editOptions -->\n" );
@@ -1931,20 +2412,75 @@ HTML
 	 */
 	protected function showConflict() {
 		global $wgOut;
-		$this->textbox2 = $this->textbox1;
-		$this->textbox1 = $this->getContent();
+
 		if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
 			$wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
 
-			$de = new DifferenceEngine( $this->mTitle );
+			$de = new DifferenceEngine( $this->mArticle->getContext() );
 			$de->setText( $this->textbox2, $this->textbox1 );
-			$de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
+			$de->showDiff( wfMsgExt( 'yourtext', 'parseinline' ), wfMsg( 'storedversion' ) );
 
 			$wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
 			$this->showTextbox2();
 		}
 	}
 
+	/**
+	 * @return string
+	 */
+	public function getCancelLink() {
+		$cancelParams = array();
+		if ( !$this->isConflict && $this->oldid > 0 ) {
+			$cancelParams['oldid'] = $this->oldid;
+		}
+
+		return Linker::linkKnown(
+			$this->getContextTitle(),
+			wfMsgExt( 'cancel', array( 'parseinline' ) ),
+			array( 'id' => 'mw-editform-cancel' ),
+			$cancelParams
+		);
+	}
+
+	/**
+	 * 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 object for which is being edited (where we go to for &action= links)
+	 * @return string
+	 */
+	protected function getActionURL( Title $title ) {
+		return $title->getLocalURL( array( '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.
+	 */
+	protected function wasDeletedSinceLastEdit() {
+		if ( $this->deletedSinceEdit !== null ) {
+			return $this->deletedSinceEdit;
+		}
+
+		$this->deletedSinceEdit = false;
+
+		if ( $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;
+	}
+
 	protected function getLastDelete() {
 		$dbr = wfGetDB( DB_SLAVE );
 		$data = $dbr->selectRow(
@@ -1968,10 +2504,10 @@ HTML
 			array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
 		);
 		// Quick paranoid permission checks...
-		if( is_object( $data ) ) {
-			if( $data->log_deleted & LogPage::DELETED_USER )
+		if ( is_object( $data ) ) {
+			if ( $data->log_deleted & LogPage::DELETED_USER )
 				$data->user_name = wfMsgHtml( 'rev-deleted-user' );
-			if( $data->log_deleted & LogPage::DELETED_COMMENT )
+			if ( $data->log_deleted & LogPage::DELETED_COMMENT )
 				$data->log_comment = wfMsgHtml( 'rev-deleted-comment' );
 		}
 		return $data;
@@ -1982,10 +2518,25 @@ HTML
 	 * @return string
 	 */
 	function getPreviewText() {
-		global $wgOut, $wgUser, $wgParser;
+		global $wgOut, $wgUser, $wgParser, $wgRawHtml;
 
 		wfProfileIn( __METHOD__ );
 
+		if ( $wgRawHtml && !$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 = $wgOut->parse( "<div class='previewnote'>" .
+					wfMsg( 'session_fail_preview_html' ) . "</div>", true, /* interface */true );
+			}
+			wfProfileOut( __METHOD__ );
+			return $parsedNote;
+		}
+
 		if ( $this->mTriedSave && !$this->mTokenOk ) {
 			if ( $this->mTokenOkExceptSuffix ) {
 				$note = wfMsg( 'token_suffix_mismatch' );
@@ -2000,309 +2551,107 @@ HTML
 
 		$parserOptions = ParserOptions::newFromUser( $wgUser );
 		$parserOptions->setEditSection( false );
+		$parserOptions->setTidy( true );
 		$parserOptions->setIsPreview( true );
-		$parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
-
-		global $wgRawHtml;
-		if ( $wgRawHtml && !$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 = $wgOut->parse( "<div class='previewnote'>" .
-					wfMsg( 'session_fail_preview_html' ) . "</div>" );
-			}
-			wfProfileOut( __METHOD__ );
-			return $parsedNote;
-		}
+		$parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
 
-		# don't parse user css/js, show message about preview
+		# don't parse non-wikitext pages, show message about preview
 		# XXX: stupid php bug won't let us use $this->getContextTitle()->isCssJsSubpage() here -- This note has been there since r3530. Sure the bug was fixed time ago?
 
-		if ( $this->isCssJsSubpage || $this->mTitle->isCssOrJsPage() ) {
-			$level = 'user';
-			if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
+		if ( $this->isCssJsSubpage || !$this->mTitle->isWikitextPage() ) {
+			if ( $this->mTitle->isCssJsSubpage() ) {
+				$level = 'user';
+			} elseif ( $this->mTitle->isCssOrJsPage() ) {
 				$level = 'site';
+			} else {
+				$level = false;
 			}
 
 			# Used messages to make sure grep find them:
 			# Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
-			if (preg_match( "/\\.css$/", $this->mTitle->getText() ) ) {
-				$previewtext = "<div id='mw-{$level}csspreview'>\n" . wfMsg( "{$level}csspreview" ) . "\n</div>";
-				$class = "mw-code mw-css";
-			} elseif (preg_match( "/\\.js$/", $this->mTitle->getText() ) ) {
-				$previewtext = "<div id='mw-{$level}jspreview'>\n" . wfMsg( "{$level}jspreview" ) . "\n</div>";
-				$class = "mw-code mw-js";
-			} else {
-				throw new MWException( 'A CSS/JS (sub)page but which is not css nor js!' );
+			if ( $level ) {
+				if ( preg_match( "/\\.css$/", $this->mTitle->getText() ) ) {
+					$previewtext = "<div id='mw-{$level}csspreview'>\n" . wfMsg( "{$level}csspreview" ) . "\n</div>";
+					$class = "mw-code mw-css";
+				} elseif ( preg_match( "/\\.js$/", $this->mTitle->getText() ) ) {
+					$previewtext = "<div id='mw-{$level}jspreview'>\n" . wfMsg( "{$level}jspreview" ) . "\n</div>";
+					$class = "mw-code mw-js";
+				} else {
+					throw new MWException( 'A CSS/JS (sub)page but which is not css nor js!' );
+				}
 			}
 
-			$parserOptions->setTidy( true );
 			$parserOutput = $wgParser->parse( $previewtext, $this->mTitle, $parserOptions );
 			$previewHTML = $parserOutput->mText;
 			$previewHTML .= "<pre class=\"$class\" dir=\"ltr\">\n" . htmlspecialchars( $this->textbox1 ) . "\n</pre>\n";
 		} else {
-			$rt = Title::newFromRedirectArray( $this->textbox1 );
-			if ( $rt ) {
-				$previewHTML = $this->mArticle->viewRedirect( $rt, false );
-			} else {
-				$toparse = $this->textbox1;
-
-				# If we're adding a comment, we need to show the
-				# summary as the headline
-				if ( $this->section == "new" && $this->summary != "" ) {
-					$toparse = "== {$this->summary} ==\n\n" . $toparse;
-				}
-
-				wfRunHooks( 'EditPageGetPreviewText', array( $this, &$toparse ) );
-
-				$parserOptions->setTidy( true );
-				$parserOptions->enableLimitReport();
-				$parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ),
-					$this->mTitle, $parserOptions );
-
-				$previewHTML = $parserOutput->getText();
-				$this->mParserOutput = $parserOutput;
-				$wgOut->addParserOutputNoText( $parserOutput );
+			$toparse = $this->textbox1;
 
-				if ( count( $parserOutput->getWarnings() ) ) {
-					$note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
-				}
+			# If we're adding a comment, we need to show the
+			# summary as the headline
+			if ( $this->section == "new" && $this->summary != "" ) {
+				$toparse = wfMsgForContent( 'newsectionheaderdefaultlevel', $this->summary ) . "\n\n" . $toparse;
 			}
-		}
 
-		if( $this->isConflict ) {
-			$conflict = '<h2 id="mw-previewconflict">' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
-		} else {
-			$conflict = '<hr />';
-		}
+			wfRunHooks( 'EditPageGetPreviewText', array( $this, &$toparse ) );
 
-		$previewhead = "<div class='previewnote'>\n" .
-			'<h2 id="mw-previewheader">' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>" .
-			$wgOut->parse( $note ) . $conflict . "</div>\n";
+			$parserOptions->enableLimitReport();
 
-		$pageLang = $this->mTitle->getPageLanguage();
-		$attribs = array( 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
-			'class' => 'mw-content-'.$pageLang->getDir() );
-		$previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
+			$toparse = $wgParser->preSaveTransform( $toparse, $this->mTitle, $wgUser, $parserOptions );
+			$parserOutput = $wgParser->parse( $toparse, $this->mTitle, $parserOptions );
 
-		wfProfileOut( __METHOD__ );
-		return $previewhead . $previewHTML . $this->previewTextAfterContent;
-	}
-
-	/**
-	 * @return Array
-	 */
-	function getTemplates() {
-		if ( $this->preview || $this->section != '' ) {
-			$templates = array();
-			if ( !isset( $this->mParserOutput ) ) {
-				return $templates;
-			}
-			foreach( $this->mParserOutput->getTemplates() as $ns => $template) {
-				foreach( array_keys( $template ) as $dbk ) {
-					$templates[] = Title::makeTitle($ns, $dbk);
-				}
+			$rt = Title::newFromRedirectArray( $this->textbox1 );
+			if ( $rt ) {
+				$previewHTML = $this->mArticle->viewRedirect( $rt, false );
+			} else {
+				$previewHTML = $parserOutput->getText();
 			}
-			return $templates;
-		} else {
-			return $this->mArticle->getUsedTemplates();
-		}
-	}
-
-	/**
-	 * Call the stock "user is blocked" page
-	 */
-	function blockedPage() {
-		global $wgOut;
-		$wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
-
-		# If the user made changes, preserve them when showing the markup
-		# (This happens when a user is blocked during edit, for instance)
-		$first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
-		if ( $first ) {
-			$source = $this->mTitle->exists() ? $this->getContent() : false;
-		} else {
-			$source = $this->textbox1;
-		}
-
-		# Spit out the source or the user's modified version
-		if ( $source !== false ) {
-			$wgOut->addHTML( '<hr />' );
-			$wgOut->addWikiMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() );
-			$this->showTextbox1( array( 'readonly' ), $source );
-		}
-	}
-
-	/**
-	 * Produce the stock "please login to edit pages" page
-	 */
-	function userNotLoggedInPage() {
-		global $wgOut;
-
-		$loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
-		$loginLink = Linker::linkKnown(
-			$loginTitle,
-			wfMsgHtml( 'loginreqlink' ),
-			array(),
-			array( 'returnto' => $this->getContextTitle()->getPrefixedText() )
-		);
-
-		$wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
-		$wgOut->setRobotPolicy( 'noindex,nofollow' );
-		$wgOut->setArticleRelated( false );
-
-		$wgOut->addHTML( wfMessage( 'whitelistedittext' )->rawParams( $loginLink )->parse() );
-		$wgOut->returnToMain( false, $this->getContextTitle() );
-	}
-
-	/**
-	 * Creates a basic error page which informs the user that
-	 * they have attempted to edit a nonexistent section.
-	 */
-	function noSuchSectionPage() {
-		global $wgOut;
-
-		$wgOut->setPageTitle( wfMsg( 'nosuchsectiontitle' ) );
-		$wgOut->setRobotPolicy( 'noindex,nofollow' );
-		$wgOut->setArticleRelated( false );
-
-		$res = wfMsgExt( 'nosuchsectiontext', 'parse', $this->section );
-		wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
-		$wgOut->addHTML( $res );
-
-		$wgOut->returnToMain( false, $this->mTitle );
-	}
-
-	/**
-	 * Produce the stock "your edit contains spam" page
-	 *
-	 * @param $match Text which triggered one or more filters
-	 * @deprecated since 1.17 Use method spamPageWithContent() instead
-	 */
-	static function spamPage( $match = false ) {
-		global $wgOut, $wgTitle;
-
-		$wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
-		$wgOut->setRobotPolicy( 'noindex,nofollow' );
-		$wgOut->setArticleRelated( false );
-
-		$wgOut->addHTML( '<div id="spamprotected">' );
-		$wgOut->addWikiMsg( 'spamprotectiontext' );
-		if ( $match ) {
-			$wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
-		}
-		$wgOut->addHTML( '</div>' );
-
-		$wgOut->returnToMain( false, $wgTitle );
-	}
-
-	/**
-	 * Show "your edit contains spam" page with your diff and text
-	 *
-	 * @param $match Text which triggered one or more filters
-	 */
-	public function spamPageWithContent( $match = false ) {
-		global $wgOut;
-		$this->textbox2 = $this->textbox1;
-
-		$wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
-		$wgOut->setRobotPolicy( 'noindex,nofollow' );
-		$wgOut->setArticleRelated( false );
-
-		$wgOut->addHTML( '<div id="spamprotected">' );
-		$wgOut->addWikiMsg( 'spamprotectiontext' );
-		if ( $match ) {
-			$wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
-		}
-		$wgOut->addHTML( '</div>' );
-
-		$wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
-		$de = new DifferenceEngine( $this->mTitle );
-		$de->setText( $this->getContent(), $this->textbox2 );
-		$de->showDiff( wfMsg( "storedversion" ), wfMsg( "yourtext" ) );
-
-		$wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
-		$this->showTextbox2();
-
-		$wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
-	}
 
+			$this->mParserOutput = $parserOutput;
+			$wgOut->addParserOutputNoText( $parserOutput );
 
-	/**
-	 * @private
-	 * @todo document
-	 *
-	 * @parma $editText string
-	 *
-	 * @return bool
-	 */
-	function mergeChangesInto( &$editText ){
-		wfProfileIn( __METHOD__ );
-
-		$db = wfGetDB( DB_MASTER );
-
-		// This is the revision the editor started from
-		$baseRevision = $this->getBaseRevision();
-		if ( is_null( $baseRevision ) ) {
-			wfProfileOut( __METHOD__ );
-			return false;
-		}
-		$baseText = $baseRevision->getText();
-
-		// The current state, we want to merge updates into it
-		$currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
-		if ( is_null( $currentRevision ) ) {
-			wfProfileOut( __METHOD__ );
-			return false;
-		}
-		$currentText = $currentRevision->getText();
-
-		$result = '';
-		if ( wfMerge( $baseText, $editText, $currentText, $result ) ) {
-			$editText = $result;
-			wfProfileOut( __METHOD__ );
-			return true;
-		} else {
-			wfProfileOut( __METHOD__ );
-			return false;
+			if ( count( $parserOutput->getWarnings() ) ) {
+				$note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
+			}
 		}
-	}
 
-	/**
-	 * Check if the browser is on a blacklist of user-agents known to
-	 * mangle UTF-8 data on form submission. Returns true if Unicode
-	 * should make it through, false if it's known to be a problem.
-	 * @return bool
-	 * @private
-	 */
-	function checkUnicodeCompliantBrowser() {
-		global $wgBrowserBlackList;
-		if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
-			// No User-Agent header sent? Trust it by default...
-			return true;
-		}
-		$currentbrowser = $_SERVER["HTTP_USER_AGENT"];
-		foreach ( $wgBrowserBlackList as $browser ) {
-			if ( preg_match($browser, $currentbrowser) ) {
-				return false;
-			}
+		if ( $this->isConflict ) {
+			$conflict = '<h2 id="mw-previewconflict">' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
+		} else {
+			$conflict = '<hr />';
 		}
-		return true;
+
+		$previewhead = "<div class='previewnote'>\n" .
+			'<h2 id="mw-previewheader">' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>" .
+			$wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
+
+		$pageLang = $this->mTitle->getPageLanguage();
+		$attribs = array( 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
+			'class' => 'mw-content-' . $pageLang->getDir() );
+		$previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
+
+		wfProfileOut( __METHOD__ );
+		return $previewhead . $previewHTML . $this->previewTextAfterContent;
 	}
 
 	/**
-	 * Format an anchor fragment as it would appear for a given section name
-	 * @param $text String
-	 * @return String
-	 * @private
+	 * @return Array
 	 */
-	function sectionAnchor( $text ) {
-		global $wgParser;
-		return $wgParser->guessSectionNameFromWikiText( $text );
+	function getTemplates() {
+		if ( $this->preview || $this->section != '' ) {
+			$templates = array();
+			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();
+		}
 	}
 
 	/**
@@ -2395,7 +2744,7 @@ HTML
 				'tip'    => wfMsg( 'media_tip' ),
 				'key'    => 'M'
 			) : false,
-			$wgUseTeX ?	array(
+			$wgUseTeX ? array(
 				'image'  => $wgLang->getImageFile( 'button-math' ),
 				'id'     => 'mw-editbutton-math',
 				'open'   => "<math>",
@@ -2432,9 +2781,8 @@ HTML
 				'key'    => 'R'
 			)
 		);
-		$toolbar = "<div id='toolbar'>\n";
 
-		$script = '';
+		$script = 'mw.loader.using("mediawiki.action.edit", function() {';
 		foreach ( $toolarray as $tool ) {
 			if ( !$tool ) {
 				continue;
@@ -2453,15 +2801,19 @@ HTML
 				$cssId = $tool['id'],
 			);
 
-			$paramList = implode( ',',
-				array_map( array( 'Xml', 'encodeJsVar' ), $params ) );
-			$script .= "mw.toolbar.addButton($paramList);\n";
+			$script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
 		}
-		$wgOut->addScript( Html::inlineScript(
-			"if ( window.mediaWiki ) {{$script}}"
-		) );
 
-		$toolbar .= "\n</div>";
+		// This used to be called on DOMReady from mediawiki.action.edit, which
+		// ended up causing race conditions with the setup code above.
+		$script .= "\n" .
+			"// Create button bar\n" .
+			"$(function() { mw.toolbar.init(); } );\n";
+
+		$script .= '});';
+		$wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
+
+		$toolbar = '<div id="toolbar"></div>';
 
 		wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
 
@@ -2472,7 +2824,7 @@ HTML
 	 * Returns an array of html code of the following checkboxes:
 	 * minor and watch
 	 *
-	 * @param $tabindex Current tabindex
+	 * @param $tabindex int Current tabindex
 	 * @param $checked Array of checkbox => bool, where bool indicates the checked
 	 *                 status of the checkbox
 	 *
@@ -2523,7 +2875,7 @@ HTML
 	 * Returns an array of html code of the following buttons:
 	 * save, diff, preview and live
 	 *
-	 * @param $tabindex Current tabindex
+	 * @param $tabindex int Current tabindex
 	 *
 	 * @return array
 	 */
@@ -2537,9 +2889,9 @@ HTML
 			'tabindex'  => ++$tabindex,
 			'value'     => wfMsg( 'savearticle' ),
 			'accesskey' => wfMsg( 'accesskey-save' ),
-			'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
+			'title'     => wfMsg( 'tooltip-save' ) . ' [' . wfMsg( 'accesskey-save' ) . ']',
 		);
-		$buttons['save'] = Xml::element('input', $temp, '');
+		$buttons['save'] = Xml::element( 'input', $temp, '' );
 
 		++$tabindex; // use the same for preview and live preview
 		$temp = array(
@@ -2600,50 +2952,136 @@ HTML
 	}
 
 	/**
-	 * @return string
+	 * Call the stock "user is blocked" page
+	 *
+	 * @deprecated in 1.19; throw an exception directly instead
 	 */
-	public function getCancelLink() {
-		$cancelParams = array();
-		if ( !$this->isConflict && $this->mArticle->getOldID() > 0 ) {
-			$cancelParams['oldid'] = $this->mArticle->getOldID();
-		}
+	function blockedPage() {
+		wfDeprecated( __METHOD__, '1.19' );
+		global $wgUser;
 
-		return Linker::linkKnown(
-			$this->getContextTitle(),
-			wfMsgExt( 'cancel', array( 'parseinline' ) ),
-			array( 'id' => 'mw-editform-cancel' ),
-			$cancelParams
-		);
+		throw new UserBlockedError( $wgUser->getBlock() );
 	}
 
 	/**
-	 * Get a diff between the current contents of the edit box and the
-	 * version of the page we're editing from.
+	 * Produce the stock "please login to edit pages" page
 	 *
-	 * If this is a section edit, we'll replace the section as for final
-	 * save and then make a comparison.
+	 * @deprecated in 1.19; throw an exception directly instead
 	 */
-	function showDiff() {
-		$oldtext = $this->mArticle->fetchContent();
-		$newtext = $this->mArticle->replaceSection(
-			$this->section, $this->textbox1, $this->summary, $this->edittime );
+	function userNotLoggedInPage() {
+		wfDeprecated( __METHOD__, '1.19' );
+		throw new PermissionsError( 'edit' );
+	}
 
-		wfRunHooks( 'EditPageGetDiffText', array( $this, &$newtext ) );
+	/**
+	 * Show an error page saying to the user that he has insufficient permissions
+	 * to create a new page
+	 *
+	 * @deprecated in 1.19; throw an exception directly instead
+	 */
+	function noCreatePermission() {
+		wfDeprecated( __METHOD__, '1.19' );
+		$permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
+		throw new PermissionsError( $permission );
+	}
 
-		$newtext = $this->mArticle->preSaveTransform( $newtext );
-		$oldtitle = wfMsgExt( 'currentrev', array( 'parseinline' ) );
-		$newtitle = wfMsgExt( 'yourtext', array( 'parseinline' ) );
-		if ( $oldtext !== false  || $newtext != '' ) {
-			$de = new DifferenceEngine( $this->mTitle );
-			$de->setText( $oldtext, $newtext );
-			$difftext = $de->getDiff( $oldtitle, $newtitle );
-			$de->showDiffStyle();
-		} else {
-			$difftext = '';
+	/**
+	 * Creates a basic error page which informs the user that
+	 * they have attempted to edit a nonexistent section.
+	 */
+	function noSuchSectionPage() {
+		global $wgOut;
+
+		$wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
+
+		$res = wfMsgExt( 'nosuchsectiontext', 'parse', $this->section );
+		wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
+		$wgOut->addHTML( $res );
+
+		$wgOut->returnToMain( false, $this->mTitle );
+	}
+
+	/**
+	 * Produce the stock "your edit contains spam" page
+	 *
+	 * @param $match string Text which triggered one or more filters
+	 * @deprecated since 1.17 Use method spamPageWithContent() instead
+	 */
+	static function spamPage( $match = false ) {
+		wfDeprecated( __METHOD__, '1.17' );
+
+		global $wgOut, $wgTitle;
+
+		$wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
+
+		$wgOut->addHTML( '<div id="spamprotected">' );
+		$wgOut->addWikiMsg( 'spamprotectiontext' );
+		if ( $match ) {
+			$wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
 		}
+		$wgOut->addHTML( '</div>' );
 
+		$wgOut->returnToMain( false, $wgTitle );
+	}
+
+	/**
+	 * Show "your edit contains spam" page with your diff and text
+	 *
+	 * @param $match string|bool Text which triggered one or more filters
+	 */
+	public function spamPageWithContent( $match = false ) {
 		global $wgOut;
-		$wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
+		$this->textbox2 = $this->textbox1;
+
+		$wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
+
+		$wgOut->addHTML( '<div id="spamprotected">' );
+		$wgOut->addWikiMsg( 'spamprotectiontext' );
+		if ( $match ) {
+			$wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
+		}
+		$wgOut->addHTML( '</div>' );
+
+		$wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
+		$this->showDiff();
+
+		$wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
+		$this->showTextbox2();
+
+		$wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
+	}
+
+	/**
+	 * Format an anchor fragment as it would appear for a given section name
+	 * @param $text String
+	 * @return String
+	 * @private
+	 */
+	function sectionAnchor( $text ) {
+		global $wgParser;
+		return $wgParser->guessSectionNameFromWikiText( $text );
+	}
+
+	/**
+	 * Check if the browser is on a blacklist of user-agents known to
+	 * mangle UTF-8 data on form submission. Returns true if Unicode
+	 * should make it through, false if it's known to be a problem.
+	 * @return bool
+	 * @private
+	 */
+	function checkUnicodeCompliantBrowser() {
+		global $wgBrowserBlackList;
+		if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
+			// No User-Agent header sent? Trust it by default...
+			return true;
+		}
+		$currentbrowser = $_SERVER["HTTP_USER_AGENT"];
+		foreach ( $wgBrowserBlackList as $browser ) {
+			if ( preg_match( $browser, $currentbrowser ) ) {
+				return false;
+			}
+		}
+		return true;
 	}
 
 	/**
@@ -2710,25 +3148,25 @@ HTML
 		$bytesleft = 0;
 		$result = "";
 		$working = 0;
-		for( $i = 0; $i < strlen( $invalue ); $i++ ) {
+		for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
 			$bytevalue = ord( $invalue[$i] );
-			if ( $bytevalue <= 0x7F ) { //0xxx xxxx
+			if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
 				$result .= chr( $bytevalue );
 				$bytesleft = 0;
-			} elseif ( $bytevalue <= 0xBF ) { //10xx xxxx
+			} elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
 				$working = $working << 6;
-				$working += ($bytevalue & 0x3F);
+				$working += ( $bytevalue & 0x3F );
 				$bytesleft--;
 				if ( $bytesleft <= 0 ) {
 					$result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
 				}
-			} elseif ( $bytevalue <= 0xDF ) { //110x xxxx
+			} elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
 				$working = $bytevalue & 0x1F;
 				$bytesleft = 1;
-			} elseif ( $bytevalue <= 0xEF ) { //1110 xxxx
+			} elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
 				$working = $bytevalue & 0x0F;
 				$bytesleft = 2;
-			} else { //1111 0xxx
+			} else { // 1111 0xxx
 				$working = $bytevalue & 0x07;
 				$bytesleft = 3;
 			}
@@ -2747,20 +3185,20 @@ HTML
 	 */
 	function unmakesafe( $invalue ) {
 		$result = "";
-		for( $i = 0; $i < strlen( $invalue ); $i++ ) {
-			if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i+3] != '0' ) ) {
+		for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
+			if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
 				$i += 3;
 				$hexstring = "";
 				do {
 					$hexstring .= $invalue[$i];
 					$i++;
-				} while( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
+				} while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
 
 				// Do some sanity checks. These aren't needed for reversability,
 				// but should help keep the breakage down if the editor
 				// breaks one of the entities whilst editing.
-				if ( (substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6) ) {
-					$codepoint = hexdec($hexstring);
+				if ( ( substr( $invalue, $i, 1 ) == ";" ) and ( strlen( $hexstring ) <= 6 ) ) {
+					$codepoint = hexdec( $hexstring );
 					$result .= codepointToUtf8( $codepoint );
 				} else {
 					$result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
@@ -2772,116 +3210,4 @@ HTML
 		// reverse the transform that we made for reversability reasons.
 		return strtr( $result, array( "&#x0" => "&#x" ) );
 	}
-
-	function noCreatePermission() {
-		global $wgOut;
-		$wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
-		$wgOut->addWikiMsg( 'nocreatetext' );
-	}
-
-	/**
-	 * Attempt submission
-	 * @return bool false if output is done, true if the rest of the form should be displayed
-	 */
-	function attemptSave() {
-		global $wgUser, $wgOut;
-
-		$resultDetails = false;
-		# Allow bots to exempt some edits from bot flagging
-		$bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
-		$value = $this->internalAttemptSave( $resultDetails, $bot );
-
-		if ( $value == self::AS_SUCCESS_UPDATE || $value == self::AS_SUCCESS_NEW_ARTICLE ) {
-			$this->didSave = true;
-		}
-
-		switch ( $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:
-				return true;
-
-			case self::AS_HOOK_ERROR:
-			case self::AS_FILTERING:
-				return false;
-
-			case self::AS_SUCCESS_NEW_ARTICLE:
-				$query = $resultDetails['redirect'] ? 'redirect=no' : '';
-				$wgOut->redirect( $this->mTitle->getFullURL( $query ) );
-				return false;
-
-			case self::AS_SUCCESS_UPDATE:
-				$extraQuery = '';
-				$sectionanchor = $resultDetails['sectionanchor'];
-
-				// Give extensions a chance to modify URL query on update
-				wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this->mArticle, &$sectionanchor, &$extraQuery ) );
-
-				if ( $resultDetails['redirect'] ) {
-					if ( $extraQuery == '' ) {
-						$extraQuery = 'redirect=no';
-					} else {
-						$extraQuery = 'redirect=no&' . $extraQuery;
-					}
-				}
-				$wgOut->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:
-				$this->blockedPage();
-				return false;
-
-			case self::AS_IMAGE_REDIRECT_ANON:
-				$wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
-				return false;
-
-			case self::AS_READ_ONLY_PAGE_ANON:
-				$this->userNotLoggedInPage();
-				return false;
-
-			case self::AS_READ_ONLY_PAGE_LOGGED:
-			case self::AS_READ_ONLY_PAGE:
-				$wgOut->readOnlyPage();
-				return false;
-
-			case self::AS_RATE_LIMITED:
-				$wgOut->rateLimited();
-				return false;
-
-			case self::AS_NO_CREATE_PERMISSION:
-				$this->noCreatePermission();
-				return false;
-
-			case self::AS_BLANK_ARTICLE:
-				$wgOut->redirect( $this->getContextTitle()->getFullURL() );
-				return false;
-
-			case self::AS_IMAGE_REDIRECT_LOGGED:
-				$wgOut->permissionRequired( 'upload' );
-				return false;
-		}
-	}
-
-	/**
-	 * @return Revision
-	 */
-	function getBaseRevision() {
-		if ( !$this->mBaseRevision ) {
-			$db = wfGetDB( DB_MASTER );
-			$baseRevision = Revision::loadFromTimestamp(
-				$db, $this->mTitle, $this->edittime );
-			return $this->mBaseRevision = $baseRevision;
-		} else {
-			return $this->mBaseRevision;
-		}
-	}
 }