001    /*
002     * Copyright (C) 2003-2009 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    import org.slf4j.Logger;
024    import org.slf4j.LoggerFactory;
025    
026    /**
027     * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
028     * @version $Revision$
029     */
030    public class SSHContext {
031    
032      /** . */
033      private static final Logger log = LoggerFactory.getLogger(SSHContext.class);
034    
035      /** . */
036      public final int verase;
037    
038      /** . */
039      private final Environment env;
040    
041      public SSHContext(Environment env) {
042        if (env == null) {
043          throw new NullPointerException("No null env");
044        }
045    
046        //
047        Integer verase = env.getPtyModes().get(PtyMode.VERASE);
048    
049        //
050        this.env = env;
051        this.verase = verase != null ? verase : -1;
052      }
053    
054      public int getWidth() {
055        String s = env.getEnv().get(Environment.ENV_COLUMNS);
056        int width = 0;
057        if (s != null) {
058          try {
059            width = Integer.parseInt(s);
060          }
061          catch (NumberFormatException e) {
062            log.warn("Could not parse ssh term width " + s);
063          }
064        }
065        return width;
066      }
067    
068      public String getProperty(String key)
069      {
070        return env.getEnv().get(key);
071      }
072    }