content: /*******************************************************************************
   * Copyright (c) 2000, 2007 IBM Corporation and others.
   * All rights reserved. This program and the accompanying materials
   * are made available under the terms of the Eclipse Public License v1.0
   * which accompanies this distribution, and is available at
   * http://www.eclipse.org/legal/epl-v10.html
   *
   * Contributors:
   *     IBM Corporation - initial API and implementation
   *******************************************************************************/
  package org.eclipse.wst.jsdt.internal.ui.text;
  
  
  import org.eclipse.jface.text.BadLocationException;
  import org.eclipse.jface.text.IDocument;
  import org.eclipse.jface.text.IRegion;
  import org.eclipse.jface.text.Region;
  
  public class JavaWordFinder {
  	
  	public static IRegion findWord(IDocument document, int offset) {
  
  		int start= -2;
  		int end= -1;
  		
  		try {
  			int pos= offset;
  			char c;
  
  			while (pos >= 0) {
  				c= document.getChar(pos);
  				if (!Character.isJavaIdentifierPart(c))
  					break;
  				--pos;
  			}
  			start= pos;
  
  			pos= offset;
  			int length= document.getLength();
  
  			while (pos < length) {
  				c= document.getChar(pos);
  				if (!Character.isJavaIdentifierPart(c))
  					break;
  				++pos;
  			}
  			end= pos;
  
  		} catch (BadLocationException x) {
  		}
  
  		if (start >= -1 && end > -1) {
  			if (start == offset && end == offset)
  				return new Region(offset, 0);
  			else if (start == offset)
  				return new Region(start, end - start);
  			else
  				return new Region(start + 1, end - start - 1);
  		}
  
  		return null;
  	}
  }
  