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package com.thoughtworks.qdox.writer.impl;

/*
 * 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.
 */

public class IndentBuffer
{

    private String eol = "\n";
    private String indentation = "\t";
    private StringBuffer buffer = new StringBuffer();

    private int depth = 0;

    private boolean newLine;
    
    public void setEol( String eol )
    {
        this.eol = eol;
    }
    
    public void setIndentation( String indentation )
    {
        this.indentation = indentation;
    }

    public void write( String s )
    {
        checkNewLine();
        buffer.append( s );
    }

    public void write( char s )
    {
        checkNewLine();
        buffer.append( s );
    }

    public void newline()
    {
        buffer.append( eol );
        newLine = true;
    }

    public void indent()
    {
        depth++;
    }

    public void deindent()
    {
        depth--;
    }

    @Override
    public String toString()
    {
        return buffer.toString();
    }

    private void checkNewLine()
    {
        if ( newLine )
        {
            for ( int i = 0; i < depth; i++ )
            {
                buffer.append( indentation );
            }
            newLine = false;
        }
    }
}