net.darkmist.alib.console.StatusLine Maven / Gradle / Ivy

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/*
 *  Copyright (C) 2012 Ed Schaller 
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package net.darkmist.alib.console;

// not changed since qcomm
// added lock object since then.

public class StatusLine
{
	private static boolean enabled = false;
	private static int lastLineLength = 0;
	private static Object lock = new Object();

	public static void update(CharSequence msg)
	{
		synchronized (lock)
		{
			if(!enabled)
				return;
			System.err.print('\r');
			System.err.print(msg);
			if(msg.length() < lastLineLength)
			{
				int diff = lastLineLength - msg.length();
	
				for(int c=0;c