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
020 package org.crsh.text;
021
022 import org.crsh.shell.ScreenContext;
023
024 import java.io.IOException;
025 import java.util.LinkedList;
026
027 public class ChunkAdapter implements ScreenContext<Object> {
028
029 /** . */
030 private final LinkedList<Object> buffer = new LinkedList<Object>();
031
032 /** . */
033 private Renderable renderable = null;
034
035 /** . */
036 private final RenderAppendable out;
037
038 public ChunkAdapter(ScreenContext<Chunk> out) {
039 this.out = new RenderAppendable(out);
040 }
041
042 public int getWidth() {
043 return out.getWidth();
044 }
045
046 public int getHeight() {
047 return out.getHeight();
048 }
049
050 public Class<Object> getConsumedType() {
051 return Object.class;
052 }
053
054 public void provide(Object element) throws IOException {
055 Renderable current = Renderable.getRenderable(element.getClass());
056 if (current == null) {
057 send();
058 if (element instanceof Chunk) {
059 out.provide((Chunk)element);
060 } else {
061 out.provide(Text.create(element.toString()));
062 }
063 } else {
064 if (renderable != null && !current.equals(renderable)) {
065 send();
066 }
067 buffer.addLast(element);
068 renderable = current;
069 }
070 }
071
072 public void flush() throws IOException {
073 send();
074 out.flush();
075 }
076
077 public void send() throws IOException {
078 if (buffer.size() > 0) {
079 Renderer renderer = renderable.renderer(buffer.iterator());
080 renderer.render(out);
081 buffer.clear();
082 renderable = null;
083 }
084 }
085 }