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 }