001 /*
002 $Id: IndentPrinter.java,v 1.1 2003/10/09 17:24:19 jstrachan Exp $
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: 1.1 $
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 }