Bug 43032 Autoindent/Smart Tab in case statement
... case label: { <press Enter here> I <new cursor position> Indentation level should be one less.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/JavaIndenter.java
/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jdt.internal.ui.text;
import org.eclipse.jface.text.Assert;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jdt.internal.corext.util.CodeFormatterUtil;
import org.eclipse.jdt.internal.ui.JavaPlugin;
/**
 * Uses the {@link org.eclipse.jdt.internal.ui.text.JavaHeuristicScanner} to get the indentation
 * level for a certain position in a document.
 * 
 * <p>An instance holds some internal position in the document and is therefore not threadsafe.</p>
 * 
 * @since 3.0
 */
public class JavaIndenter {