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Groovy: A powerful, dynamic language for the JVM
/*
* Copyright 2003-2007 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package groovy.util;
import java.io.PrintWriter;
/**
* A helper class for printing indented text.
*
* @author James Strachan
* @version $Revision: 17424 $
*/
public class IndentPrinter {
private int indentLevel;
private String indent;
private PrintWriter out;
private final boolean addNewlines;
/**
* Creates a PrintWriter pointing to System.out, with an indent of two
* spaces.
* @see #IndentPrinter(PrintWriter, String)
*/
public IndentPrinter() {
this(new PrintWriter(System.out), " ");
}
/**
* Create an IndentPrinter to the given PrintWriter, with an indent of two
* spaces.
* @param out PrintWriter to output to
* @see #IndentPrinter(PrintWriter, String)
*/
public IndentPrinter(PrintWriter out) {
this(out, " ");
}
/**
* Create an IndentPrinter to the given PrintWriter
* @param out PrintWriter to output to
* @param indent character(s) used to indent each line
*/
public IndentPrinter(PrintWriter out, String indent) {
this(out, indent, true);
}
public IndentPrinter(PrintWriter out, String indent, boolean addNewlines) {
this.addNewlines = addNewlines;
if (out == null) {
/** @todo temporary hack */
out = new PrintWriter(System.out);
//throw new IllegalArgumentException("Must specify a PrintWriter");
}
this.out = out;
this.indent = indent;
}
public void println(String text) {
out.print(text);
println();
}
public void print(String text) {
out.print(text);
}
public void print(char c) {
out.print(c);
}
public void printIndent() {
for (int i = 0; i < indentLevel; i++) {
out.print(indent);
}
}
public void println() {
if (addNewlines) out.print("\n");
}
public void incrementIndent() {
++indentLevel;
}
public void decrementIndent() {
--indentLevel;
}
public int getIndentLevel() {
return indentLevel;
}
public void setIndentLevel(int indentLevel) {
this.indentLevel = indentLevel;
}
public void flush() {
out.flush();
}
}