001    /*
002     * Copyright (C) 2012 eXo Platform SAS.
003     *
004     * This is free software; you can redistribute it and/or modify it
005     * under the terms of the GNU Lesser General Public License as
006     * published by the Free Software Foundation; either version 2.1 of
007     * the License, or (at your option) any later version.
008     *
009     * This software is distributed in the hope that it will be useful,
010     * but WITHOUT ANY WARRANTY; without even the implied warranty of
011     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012     * Lesser General Public License for more details.
013     *
014     * You should have received a copy of the GNU Lesser General Public
015     * License along with this software; if not, write to the Free
016     * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
017     * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
018     */
019    package org.crsh.ssh.term;
020    
021    import org.apache.sshd.common.PtyMode;
022    import org.apache.sshd.server.Environment;
023    
024    import java.util.logging.Level;
025    import java.util.logging.Logger;
026    
027    public class SSHContext {
028    
029      /** . */
030      private static final Logger log = Logger.getLogger(SSHContext.class.getName());
031    
032      /** . */
033      public final int verase;
034    
035      /** . */
036      private final Environment env;
037    
038      public SSHContext(Environment env) {
039        if (env == null) {
040          throw new NullPointerException("No null env");
041        }
042    
043        //
044        Integer verase = env.getPtyModes().get(PtyMode.VERASE);
045    
046        //
047        this.env = env;
048        this.verase = verase != null ? verase : -1;
049      }
050    
051      public int getWidth() {
052        String s = env.getEnv().get(Environment.ENV_COLUMNS);
053        int width = -1;
054        if (s != null) {
055          try {
056            width = Integer.parseInt(s);
057          }
058          catch (NumberFormatException e) {
059            log.log(Level.WARNING, "Could not parse ssh term width " + s);
060          }
061        }
062        return width;
063      }
064    
065      public int getHeight() {
066        String s = env.getEnv().get(Environment.ENV_LINES);
067        int height = -1;
068        if (s != null) {
069          try {
070            height = Integer.parseInt(s);
071          }
072          catch (NumberFormatException e) {
073            log.log(Level.WARNING, "Could not parse ssh term height " + s);
074          }
075        }
076        return height;
077      }
078    
079      public String getProperty(String key)
080      {
081        return env.getEnv().get(key);
082      }
083    }