| 1 | /* |
| 2 | * This file is part of lanterna (http://code.google.com/p/lanterna/). |
| 3 | * |
| 4 | * lanterna is free software: you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU Lesser General Public License as published by |
| 6 | * the Free Software Foundation, either version 3 of the License, or |
| 7 | * (at your option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU Lesser General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU Lesser General Public License |
| 15 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 16 | * |
| 17 | * Copyright (C) 2010-2015 Martin |
| 18 | */ |
| 19 | package com.googlecode.lanterna.input; |
| 20 | |
| 21 | import java.util.List; |
| 22 | |
| 23 | /** |
| 24 | * Character pattern that matches one character as one KeyStroke with the character that was read |
| 25 | * |
| 26 | * @author Martin, Andreas |
| 27 | */ |
| 28 | public class NormalCharacterPattern implements CharacterPattern { |
| 29 | @Override |
| 30 | public Matching match(List<Character> seq) { |
| 31 | if (seq.size() != 1) { |
| 32 | return null; // nope |
| 33 | } |
| 34 | char ch = seq.get(0); |
| 35 | if (isPrintableChar(ch)) { |
| 36 | KeyStroke ks = new KeyStroke(ch, false, false); |
| 37 | return new Matching( ks ); |
| 38 | } else { |
| 39 | return null; // nope |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | /** |
| 44 | * From http://stackoverflow.com/questions/220547/printable-char-in-java |
| 45 | * @param c character to test |
| 46 | * @return True if this is a 'normal', printable character, false otherwise |
| 47 | */ |
| 48 | private static boolean isPrintableChar(char c) { |
| 49 | if (Character.isISOControl(c)) { return false; } |
| 50 | Character.UnicodeBlock block = Character.UnicodeBlock.of(c); |
| 51 | return block != null && block != Character.UnicodeBlock.SPECIALS; |
| 52 | } |
| 53 | } |