/* Commands.java{{IS_NOTE	Purpose:			Description:			History:		Sun Oct  2 11:48:07     2005, Created by tomyeh}}IS_NOTECopyright (C) 2004 Potix Corporation. All Rights Reserved.{{IS_RIGHT	This program is distributed under GPL Version 2.0 in the hope that	it will be useful, but WITHOUT ANY WARRANTY.}}IS_RIGHT*/package org.zkoss.zk.au.impl;import java.util.Set;import java.util.LinkedHashSet;import org.zkoss.zk.ui.Component;import org.zkoss.zk.ui.Desktop;import org.zkoss.zk.ui.UiException;import org.zkoss.zk.ui.event.MouseEvent;import org.zkoss.zk.au.AuRequest;/** * Utilities to implement {@link org.zkoss.zk.au.Command}. * * @author tomyeh */public class Commands {	/** Converts the data of the specified request to a set of Component.	 * The data is assumed to contain a list of item ID in the	 * comman-separated format	 *	 * @return a set of components.	 */	public static Set convertToItems(AuRequest request) {		final Set items = new LinkedHashSet();		final String[] data = request.getData();		String s = data != null && data.length > 0 ? data[0]: null;		if (s != null) {			s = s.trim();			if (s.length() > 0) {				final Desktop desktop = request.getDesktop();				for (int j = 0, k = 0; k >=0; j = k + 1) {					k = s.indexOf(',', j);					final String uuid =						k >= 0 ? s.substring(j, k): s.substring(j);					final Component item =						desktop.getComponentByUuid(uuid.trim());					items.add(item);				}			}		}		return items;	}	/** Parses the key flags of a mouse event.	 * @return a combination of {@link MouseEvent#ALT_KEY},	 * {@link MouseEvent#SHIFT_KEY} and {@link MouseEvent#CTRL_KEY},	 */	public static int parseKeys(String flags) {		int keys = 0;		if (flags != null) {			if (flags.indexOf("a") >= 0) keys |= MouseEvent.ALT_KEY;			if (flags.indexOf("c") >= 0) keys |= MouseEvent.CTRL_KEY;			if (flags.indexOf("s") >= 0) keys |= MouseEvent.SHIFT_KEY;		}		return keys;	}}