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.text;
020    
021    import java.io.IOException;
022    
023    /** @author Julien Viet */
024    public abstract class Format {
025    
026      /** . */
027      public static final Text TEXT = new Text();
028    
029      /** . */
030      public static final Ansi ANSI = new Ansi();
031    
032      /** . */
033      public static final PreHtml PRE_HTML = new PreHtml();
034    
035      public static class Text extends Format {
036        protected Text() {
037        }
038        @Override
039        public void begin(Appendable to) throws IOException {
040        }
041        @Override
042        public void write(CharSequence s, Appendable to) throws IOException {
043          if (s.length() > 0) {
044            to.append(s);
045          }
046        }
047        @Override
048        public void write(Style style, Appendable to) throws IOException {
049        }
050        @Override
051        public void cls(Appendable to) throws IOException {
052        }
053        @Override
054        public void end(Appendable to) throws IOException {
055        }
056      }
057    
058      public static class Ansi extends Format {
059        protected Ansi() {
060        }
061        @Override
062        public void begin(Appendable to) throws IOException {
063        }
064        @Override
065        public void write(CharSequence s, Appendable to) throws IOException {
066          if (s.length() > 0) {
067            to.append(s);
068          }
069        }
070        @Override
071        public void write(Style style, Appendable to) throws IOException {
072          style.writeAnsiTo(to);
073        }
074        @Override
075        public void cls(Appendable to) throws IOException {
076        }
077        @Override
078        public void end(Appendable to) throws IOException {
079        }
080      }
081    
082      public static class PreHtml extends Format {
083        protected PreHtml() {
084        }
085        @Override
086        public void begin(Appendable to) throws IOException {
087          to.append("<pre>");
088        }
089        @Override
090        public void write(CharSequence s, Appendable to) throws IOException {
091          if (s.length() > 0) {
092            for (int i = 0;i < s.length();i++) {
093              char c = s.charAt(i);
094              switch (c) {
095                case '>':
096                  to.append("&gt;");
097                  break;
098                case '<':
099                  to.append("&lt;");
100                  break;
101                case '&':
102                  to.append("&amp;");
103                  break;
104                case '\'':
105                  to.append("&#039;");
106                  break;
107                case '"':
108                  to.append("&#034;");
109                  break;
110                default:
111                  to.append(c);
112              }
113            }
114          }
115        }
116        @Override
117        public void write(Style style, Appendable to) throws IOException {
118        }
119        @Override
120        public void cls(Appendable to) throws IOException {
121        }
122        @Override
123        public void end(Appendable to) throws IOException {
124          to.append("</pre>");
125        }
126      }
127    
128      public abstract void begin(Appendable to) throws IOException;
129    
130      public abstract void write(CharSequence s, Appendable to) throws IOException;
131    
132      public abstract void write(Style style, Appendable to) throws IOException;
133    
134      public abstract void cls(Appendable to) throws IOException;
135    
136      public abstract void end(Appendable to) throws IOException;
137    }