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.ShellWriter;
023    
024    import java.io.IOException;
025    import java.util.ArrayList;
026    import java.util.List;
027    
028    /**
029     * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
030     * @version $Revision$
031     */
032    public class TreeElement extends Element {
033    
034      /** An optional value element. */
035      private Element value;
036    
037      /** . */
038      private List<Element> nodes = new ArrayList<Element>();
039    
040      public TreeElement() {
041        this(null);
042      }
043    
044      public TreeElement(Element value) {
045        this.value = value;
046      }
047    
048      public TreeElement addNode(Element node) {
049        nodes.add(node);
050        return this;
051      }
052    
053      public int getSize() {
054        return nodes.size();
055      }
056    
057      public Element getValue() {
058        return value;
059      }
060    
061      public Element getNode(int index) {
062        return nodes.get(index);
063      }
064    
065      @Override
066      void doPrint(UIWriterContext ctx, ShellWriter writer) throws IOException {
067    
068        //
069        if (value != null) {
070          value.print(ctx, writer);
071          writer.append(ctx, '\n');
072        }
073    
074        //
075        for (int i = 0;i < nodes.size();i++) {
076    
077          // Add the padding ?
078          ctx.stack.add(i == nodes.size() - 1 ? Pad.LAST_BRANCH : Pad.BRANCH);
079    //      ctx.stack.add(Foo.TRUE);
080    
081          //
082          Element node = nodes.get(i);
083          node.print(ctx, writer);
084          if (ctx.needLF) {
085            writer.append(ctx, '\n');
086          }
087          ctx.stack.remove(ctx.stack.size() - 1);
088        }
089      }
090    
091      @Override
092      int width() {
093        return 0;
094      }
095    }