/*
 * @(#)MouseEventCodec.java 1.00 2005-9-1
 *
 * Copyright 2005 BeanSoft Studio. All rights reserved.
 * PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
package studio.beansoft.remotecontrol;

import java.awt.Component;
import java.awt.Label;
import java.awt.event.MouseEvent;
import java.util.ArrayList;
import java.util.StringTokenizer;

/**
 * MouseEventCodec
 * Encode or decode java.awt.event.MouseEvent to string. The format is:
 * {x},{y},{button},{event id},{when}|{next event...
 * eg: 632,51,1,501,1125548623674|632,51,1,502,1125548623804|
 * 
 * Chinese documents:
 * 編碼或者解碼 java.awt.event.MouseEvent 為字符串. 編碼格式為:
 * {x},{y},{按鍵},{事件 id},{發生時間}|{下一事件...
 * 示例: 632,51,1,501,1125548623674|632,51,1,502,1125548623804|
 * @author BeanSoft
 * @version 1.00 2005-9-1
 */
public class MouseEventCodec {
	
	/** A component used to be a event source to avoid null constructors */
	private static final Component source = new Label();
	
	/**
	 * Encoding a series mouse events to a long string.
	 * @param eventList an ArrayList contains MouseEvent
	 * @return String contains encoded mouse events
	 */
	public static String mouseEventToString(ArrayList eventList) {
		if(eventList == null || eventList.size() == 0) return "";
		
		StringBuffer buff = new StringBuffer();
		
		for(int i = 0; i < eventList.size(); i++) {
			MouseEvent e = (MouseEvent) eventList.get(i);
			
			buff.append(e.getX()).append(",");
			buff.append(e.getY()).append(",");
			buff.append(e.getButton()).append(",");
			buff.append(e.getID()).append(",");
			buff.append(e.getWhen());
			buff.append("|");
		}
		
		return buff.toString();
	}
	
	/**
	 * Decode string to mouse event list.
	 * @param events String contains encoded mouse events
	 * @return an ArrayList contains MouseEvent
	 */
	public static ArrayList stringToMouseEvent(String events) {
		if(events == null || events.length() == 0) {
			return null;
		}
		
		ArrayList list = new ArrayList();
		
		StringTokenizer token = new StringTokenizer(events, "|");
		
		while(token.hasMoreElements()) {
			StringTokenizer stringTokenizer = new StringTokenizer(token.nextElement().toString(), ",");
			
			int x = 0, y = 0, button = 0, id = 0, when = 0;
			
			if(stringTokenizer.hasMoreElements()) {
				x = KeyEventCodec.parseInt(stringTokenizer.nextElement().toString());
			}
			
			if(stringTokenizer.hasMoreElements()) {
				y = KeyEventCodec.parseInt(stringTokenizer.nextElement().toString());
			}

			if(stringTokenizer.hasMoreElements()) {
				button = KeyEventCodec.parseInt(stringTokenizer.nextElement().toString());
			}
			
			if(stringTokenizer.hasMoreElements()) {
				id = KeyEventCodec.parseInt(stringTokenizer.nextElement().toString());
			}			
			
			if(stringTokenizer.hasMoreElements()) {
				when = KeyEventCodec.parseInt(stringTokenizer.nextElement().toString());
			}
			
			MouseEvent event = new MouseEvent(source, id, when, 0, x, y, 0, false, button);
			
			list.add(event);
		}
		
		return list;
	}

}