001    /*
002     $Id: IndentPrinter.java 206 2003-10-09 17:24:20Z jstrachan $
003    
004     Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
005    
006     Redistribution and use of this software and associated documentation
007     ("Software"), with or without modification, are permitted provided
008     that the following conditions are met:
009    
010     1. Redistributions of source code must retain copyright
011        statements and notices.  Redistributions must also contain a
012        copy of this document.
013    
014     2. Redistributions in binary form must reproduce the
015        above copyright notice, this list of conditions and the
016        following disclaimer in the documentation and/or other
017        materials provided with the distribution.
018    
019     3. The name "groovy" must not be used to endorse or promote
020        products derived from this Software without prior written
021        permission of The Codehaus.  For written permission,
022        please contact info@codehaus.org.
023    
024     4. Products derived from this Software may not be called "groovy"
025        nor may "groovy" appear in their names without prior written
026        permission of The Codehaus. "groovy" is a registered
027        trademark of The Codehaus.
028    
029     5. Due credit should be given to The Codehaus -
030        http://groovy.codehaus.org/
031    
032     THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
033     ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
034     NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
035     FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
036     THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
037     INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
038     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
039     SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
040     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
041     STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
042     ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
043     OF THE POSSIBILITY OF SUCH DAMAGE.
044    
045     */
046    package groovy.util;
047    
048    import java.io.PrintWriter;
049    
050    /**
051     * A helper class for printing indented text
052     * 
053     * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
054     * @version $Revision: 206 $
055     */
056    public class IndentPrinter {
057    
058        private int indentLevel;
059        private String indent;
060        private PrintWriter out;
061    
062        public IndentPrinter() {
063            this(new PrintWriter(System.out), "  ");
064        }
065    
066        public IndentPrinter(PrintWriter out) {
067            this(out, "  ");
068        }
069    
070        public IndentPrinter(PrintWriter out, String indent) {
071            if (out == null) {
072                /** @todo temporary hack */
073                out = new PrintWriter(System.out);
074                //throw new IllegalArgumentException("Must specify a PrintWriter");
075            }
076            this.out = out;
077            this.indent = indent;
078        }
079    
080        public void println(String text) {
081            out.print(text);
082            out.println();
083        }
084    
085        public void print(String text) {
086            out.print(text);
087        }
088    
089        public void printIndent() {
090            for (int i = 0; i < indentLevel; i++) {
091                out.print(indent);
092            }
093        }
094    
095        public void println() {
096            out.println();
097        }
098    
099        public void incrementIndent() {
100            ++indentLevel;
101        }
102    
103        public void decrementIndent() {
104            --indentLevel;
105        }
106    
107        public int getIndentLevel() {
108            return indentLevel;
109        }
110    
111        public void setIndentLevel(int indentLevel) {
112            this.indentLevel = indentLevel;
113        }
114    
115        public void flush() {
116            out.flush();
117        }
118    }