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.text;
021    
022    import org.crsh.util.AppendableWriter;
023    
024    import java.io.PrintWriter;
025    
026    /**
027     * The shell printer extends the {@link java.io.PrintWriter} and provides support for decorating a char stream.
028     *
029     * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
030     * @version $Revision$
031     */
032    public class ShellPrintWriter extends PrintWriter {
033    
034      /** . */
035      private final ShellAppendable out;
036    
037      public ShellPrintWriter(ShellAppendable out) {
038        super(new AppendableWriter(out));
039    
040        //
041        this.out = out;
042      }
043    
044      public final boolean isEmpty() {
045        return out.isEmpty();
046      }
047    
048      public final void print(Object obj, Color foreground) {
049        out.append(foreground.style);
050        print(obj);
051        out.append(Style.reset);
052      }
053    
054      public final void println(Object obj, Color foreground) {
055        print(obj, foreground.style);
056        println();
057      }
058    
059      public final void print(Object obj, Color foreground, Color background) {
060        out.append(Style.style(foreground, background));
061        print(obj);
062        out.append(Style.reset);
063      }
064    
065      public final void println(Object obj, Color foreground, Color background) {
066        print(obj, Style.style(foreground, background));
067        println();
068      }
069    
070      public final void print(Object obj, Decoration decoration) {
071        out.append(decoration.style);
072        print(obj);
073        out.append(Style.reset);
074      }
075    
076      public final void println(Object obj, Decoration decoration) {
077        print(obj, decoration.style);
078        println();
079      }
080    
081      public final void print(Object obj, Decoration decoration, Color foreground) {
082        print(obj, Style.style(decoration, foreground));
083        println();
084      }
085    
086      public final void println(Object obj, Decoration decoration, Color foreground) {
087        print(obj, Style.style(decoration, foreground, null));
088        println();
089      }
090    
091      public final void print(Object obj, Decoration decoration, Color foreground, Color background) {
092        print(obj, Style.style(decoration, foreground, background));
093        println();
094      }
095    
096      public final void println(Object obj, Decoration decoration, Color foreground, Color background) {
097        print(obj, Style.style(decoration, foreground, background));
098        println();
099      }
100    
101      public final void print(Object obj, Style style) {
102        out.append(style);
103        print(obj);
104        out.append(Style.reset);
105      }
106    
107      public final void println(Object obj, Style style) {
108        print(obj, style);
109        println();
110      }
111    
112      /**
113       * Groovy left shift operator.
114       *
115       * @param o the appended
116       * @return this object
117       */
118      public final ShellPrintWriter leftShift(Object o) {
119        if (o instanceof Style) {
120          out.append((Style)o);
121        } else if (o instanceof Decoration) {
122          out.append(((Decoration)o).style);
123        } else if (o instanceof Color) {
124          out.append(((Color)o).style);
125        } else {
126          print(o);
127        }
128        return this;
129      }
130    }