001    /*
002     * Copyright (C) 2010 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    
020    package org.crsh.shell.ui;
021    
022    import org.crsh.shell.io.ShellWriterContext;
023    
024    import java.io.IOException;
025    import java.util.ArrayList;
026    
027    /**
028     * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
029     * @version $Revision$
030     */
031    class UIWriterContext implements ShellWriterContext {
032    
033      /** . */
034      final ArrayList<Boolean> stack;
035    
036      /** . */
037      boolean needLF;
038    
039      UIWriterContext() {
040        this.stack = new ArrayList<Boolean>();
041        this.needLF = false;
042      }
043    
044      public void pad(Appendable appendable) throws IOException {
045        for (int i = 0;i < stack.size();i++) {
046          appendable.append(stack.get(i) ? "+-" : "| ");
047          stack.set(i, false);
048        }
049      }
050    
051      public void text(CharSequence csq, int off, int end) {
052        needLF = true;
053      }
054    
055      public void lineFeed() {
056        needLF = false;
057      }
058    }