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    import org.slf4j.Logger;
024    import org.slf4j.LoggerFactory;
025    
026    public class SSHContext {
027    
028      /** . */
029      private static final Logger log = LoggerFactory.getLogger(SSHContext.class);
030    
031      /** . */
032      public final int verase;
033    
034      /** . */
035      private final Environment env;
036    
037      public SSHContext(Environment env) {
038        if (env == null) {
039          throw new NullPointerException("No null env");
040        }
041    
042        //
043        Integer verase = env.getPtyModes().get(PtyMode.VERASE);
044    
045        //
046        this.env = env;
047        this.verase = verase != null ? verase : -1;
048      }
049    
050      public int getWidth() {
051        String s = env.getEnv().get(Environment.ENV_COLUMNS);
052        int width = 0;
053        if (s != null) {
054          try {
055            width = Integer.parseInt(s);
056          }
057          catch (NumberFormatException e) {
058            log.warn("Could not parse ssh term width " + s);
059          }
060        }
061        return width;
062      }
063    
064      public int getHeight() {
065        String s = env.getEnv().get(Environment.ENV_LINES);
066        int height = 0;
067        if (s != null) {
068          try {
069            height = Integer.parseInt(s);
070          }
071          catch (NumberFormatException e) {
072            log.warn("Could not parse ssh term height " + s);
073          }
074        }
075        return height;
076      }
077    
078      public String getProperty(String key)
079      {
080        return env.getEnv().get(key);
081      }
082    }