JTextFieldLimit.java

/*
 * (C) Copyright 2014 Boni Garcia (http://bonigarcia.github.io/)
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package io.github.bonigarcia.dualsub.gui;

import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.PlainDocument;

/**
 * JTextFieldLimit.
 * 
 * @author Boni Garcia (boni.gg@gmail.com)
 * @since 1.0.0
 */
public class JTextFieldLimit extends PlainDocument {

	private static final long serialVersionUID = 1L;
	private int limit;
	private boolean toUppercase = false;

	JTextFieldLimit(int limit) {
		super();
		this.limit = limit;
	}

	JTextFieldLimit(int limit, boolean upper) {
		super();
		this.limit = limit;
		toUppercase = upper;
	}

	public void insertString(int offset, String str, AttributeSet attr)
			throws BadLocationException {
		if (str == null)
			return;

		if ((getLength() + str.length()) <= limit) {
			if (toUppercase)
				str = str.toUpperCase();
			super.insertString(offset, str, attr);
		}
	}
}