package org.freehep.util.io;

import java.io.*;
import java.util.*;

/**
 * A PrintWriter that keeps track of an indentation level
 * and indents the output appropriately.
 *
 * @author Tony Johnson
 * @author Mark Donszelmann
 * @version $Id: IndentPrintWriter.java,v 1.3 2003/05/18 06:43:21 duns Exp $
 */
public class IndentPrintWriter extends PrintWriter
{
	public IndentPrintWriter(Writer w, int level)
	{
		super(w);
		setIndent(level);
	}
	public IndentPrintWriter(Writer w)
	{
		this(w, 0);
	}
	public void print(boolean s)
	{
		doIndent();
		super.print(s);
	}
	public void print(char s)
	{
		doIndent();
		super.print(s);
	}
	public void print(char[] s)
	{
		doIndent();
		super.print(s);
	}
	public void print(double s)
	{
		doIndent();
		super.print(s);
	}
	public void print(float s)
	{
		doIndent();
		super.print(s);
	}
	public void print(int s)
	{
		doIndent();
		super.print(s);
	}
	public void print(long s)
	{
		doIndent();
		super.print(s);
	}
	public void print(Object s)
	{
		doIndent();
		super.print(s);
	}
	public void print(String s)
	{
		doIndent();
		super.print(s);
	}
	public void println()
	{
		indented = false;
		super.println();
	}

    // all other println's are implemented by the superclass in terms of print's

	private void doIndent()
	{
	    if (indented) return;
		indented = true;
		for (int i=0; i<indent; i++) super.print(indentString);
	}
	/**
	 * Increase the indentation
	 */
	public void indent() { indent++; }
	/**
	 * Decrease the indentation
	 */
	public void outdent() { indent--; }
	/**
	 * Return the current indent count
	 */
	public int getIndent() { return indent; }
	/**
	 * Set the current indent count
	 */
	public void setIndent(int level) { indent = level; }
	/**
	 * Return the current indentString
	 * @see #setIndentString(String)
	 */
	public String getIndentString()
	{
		return indentString;
	}
	/**
	 * Set the current indentString. Default is a single tab per indent level.
	 * @param indentString The characters to prefix each line with (repeated for each indent level)
	 */
	public void setIndentString(String indentString)
	{
		this.indentString = indentString;
	}

	private int indent = 0;
	private boolean indented = false;
	private String indentString = "  ";

}