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a3b510ab NR |
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 characters pressed while CTRL key is held down | |
25 | * | |
26 | * @author Martin, Andreas | |
27 | */ | |
28 | public class CtrlAndCharacterPattern implements CharacterPattern { | |
29 | @Override | |
30 | public Matching match(List<Character> seq) { | |
31 | int size = seq.size(); char ch = seq.get(0); | |
32 | if (size != 1) { | |
33 | return null; // nope | |
34 | } | |
35 | if (ch < 32) { | |
36 | // Control-chars: exclude lf,cr,Tab,Esc(^[), but still include ^\, ^], ^^ and ^_ | |
37 | char ctrlCode; | |
38 | switch (ch) { | |
39 | case '\n': case '\r': case '\t': | |
40 | case KeyDecodingProfile.ESC_CODE: return null; // nope | |
41 | case 0: /* ^@ */ ctrlCode = ' '; break; | |
42 | case 28: /* ^\ */ ctrlCode = '\\'; break; | |
43 | case 29: /* ^] */ ctrlCode = ']'; break; | |
44 | case 30: /* ^^ */ ctrlCode = '^'; break; | |
45 | case 31: /* ^_ */ ctrlCode = '_'; break; | |
46 | default: ctrlCode = (char)('a' - 1 + ch); | |
47 | } | |
48 | KeyStroke ks = new KeyStroke( ctrlCode, true, false); | |
49 | return new Matching( ks ); // yep | |
50 | } else { | |
51 | return null; // nope | |
52 | } | |
53 | } | |
54 | } |