src/com/googlecode/lanterna/input/AltAndCharacterPattern.java

   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 ALT key is held down
  25  *
  26  * @author Martin, Andreas
  27  */
  28 public class AltAndCharacterPattern implements CharacterPattern {
  29
  30     @Override
  31     public Matching match(List<Character> seq) {
  32         int size = seq.size();
  33         if (size > 2 || seq.get(0) != KeyDecodingProfile.ESC_CODE) {
  34             return null; // nope
  35         }
  36         if (size == 1) {
  37             return Matching.NOT_YET; // maybe later
  38         }
  39         if ( Character.isISOControl(seq.get(1)) ) {
  40             return null; // nope
  41         }
  42         KeyStroke ks = new KeyStroke(seq.get(1), false, true);
  43         return new Matching( ks ); // yep
  44     }
  45 }