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.lang.groovy;
020    
021    import org.crsh.cli.impl.line.LineParser;
022    import org.crsh.cli.impl.line.Quoting;
023    
024    /**
025     * Escape CRLF to '\\' + 'n' inside quotes.
026     *
027     * @author Julien Viet
028     */
029    class GroovyLineEscaper extends LineParser.Visitor {
030    
031      /** . */
032      final StringBuilder buffer = new StringBuilder();
033      
034      @Override
035      public void onChar(int index, Quoting quoting, boolean backslash, char c) {
036        if (quoting != null && c == '\n') {
037          buffer.append('\\').append('n');
038        } else {
039          if (backslash) {
040            buffer.append('\\');
041          }
042          buffer.append(c);
043        }
044      }
045    
046      @Override
047      public void openStrongQuote(int index) {
048        buffer.append("'");
049      }
050    
051      @Override
052      public void closeStrongQuote(int index) {
053        buffer.append("'");
054      }
055    
056      @Override
057      public void openWeakQuote(int index) {
058        buffer.append("\"");
059      }
060    
061      @Override
062      public void closeWeakQuote(int index) {
063        buffer.append("\"");
064      }
065    }