/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you 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 org.apache.myfaces.buildtools.maven2.plugin.builder.io;

import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.Writer;

public class PrettyWriter extends PrintWriter
{
    public PrettyWriter(OutputStream out)
    {
        super(out);
    }

    public PrettyWriter(OutputStream out, boolean autoFlush)
    {
        super(out, autoFlush);
    }

    public PrettyWriter(Writer out)
    {
        super(out);
    }

    public PrettyWriter(Writer out, boolean autoFlush)
    {
        super(out, autoFlush);
    }

    public void indent()
    {
        _indentation++;
    }

    public void unindent()
    {
        _indentation--;
    }

    public void write(String string, int offset, int length)
    {
        if (_unlatchPending())
        {
            for (int i = 0; i < _indentation; i++)
            {
                super.write(TAB_INDENT, 0, 2);
            }
        }

        super.write(string, offset, length);
    }

    public void write(char[] chars, int offset, int length)
    {
        if (_unlatchPending())
        {
            for (int i = 0; i < _indentation; i++)
            {
                super.write(TAB_INDENT_CHARS, 0, 2);
            }
        }

        super.write(chars, offset, length);
    }

    public void println()
    {
        super.println();
        _latchPending();
    }

    public void println(boolean x)
    {
        super.println(x);
        _latchPending();
    }

    public void println(char x)
    {
        super.println(x);
        _latchPending();
    }

    public void println(int x)
    {
        super.println(x);
        _latchPending();
    }

    public void println(long x)
    {
        super.println(x);
        _latchPending();
    }

    public void println(float x)
    {
        super.println(x);
        _latchPending();
    }

    public void println(double x)
    {
        super.println(x);
        _latchPending();
    }

    public void println(char[] x)
    {
        super.println(x);
        _latchPending();
    }

    public void println(String x)
    {
        int fromIndex = 0;
        for (int index = x.indexOf('\n'); index != -1 && index + 1 < x.length(); fromIndex = index + 1, index = x
                .indexOf('\n', fromIndex))
        {
            super.println(x.substring(fromIndex, index));
            _latchPending();
        }

        super.println(x.substring(fromIndex));
        _latchPending();
    }

    public void println(Object x)
    {
        super.println(x);
        _latchPending();
    }

    private boolean _unlatchPending()
    {
        boolean pending = _pending;
        if (pending)
        {
            _pending = false;
        }

        return pending;
    }

    private boolean _latchPending()
    {
        boolean pending = _pending;
        if (!pending)
        {
            _pending = true;
        }

        return !pending;
    }

    private int _indentation;
    private boolean _pending = true;

    private static final String TAB_INDENT = "  ";
    private static final char[] TAB_INDENT_CHARS = TAB_INDENT.toCharArray();
}