/*
* This file is part of lanterna (http://code.google.com/p/lanterna/).
*
* lanterna 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 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see .
*
* Copyright (C) 2010-2015 Martin
*/
package com.googlecode.lanterna.input;
import java.util.List;
/**
* Character pattern that matches one character as one KeyStroke with the character that was read
*
* @author Martin, Andreas
*/
public class NormalCharacterPattern implements CharacterPattern {
@Override
public Matching match(List seq) {
if (seq.size() != 1) {
return null; // nope
}
char ch = seq.get(0);
if (isPrintableChar(ch)) {
KeyStroke ks = new KeyStroke(ch, false, false);
return new Matching( ks );
} else {
return null; // nope
}
}
/**
* From http://stackoverflow.com/questions/220547/printable-char-in-java
* @param c character to test
* @return True if this is a 'normal', printable character, false otherwise
*/
private static boolean isPrintableChar(char c) {
if (Character.isISOControl(c)) { return false; }
Character.UnicodeBlock block = Character.UnicodeBlock.of(c);
return block != null && block != Character.UnicodeBlock.SPECIALS;
}
}