IndentingDescription.java

/*******************************************************************************
 * Copyright 2014 JHC Systems Limited
 *
 * 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 jhc.redsniff.internal.util;

import org.apache.commons.lang3.StringUtils;
import org.hamcrest.StringDescription;

public class IndentingDescription extends StringDescription{

	private int indentLevel;
	
	@Override
	protected void append(String str) {
		if(indentLevel>0 && str!=null){
			String indented = str.replaceAll("\\n", indentedNewLine());
			super.append(indented);
		}
		else
			super.append(str);
	}

	private String indentedNewLine() {
		return "\n"+StringUtils.leftPad("",indentLevel,"\t");
	}

	@Override
	protected void append(char c) {
		if(c=='\n')
			super.append(indentedNewLine());
		else
			super.append(c);
	}

	public void increaseIndentLevel() {
		indentLevel++;
	}
	
	public void decreaseIndentLevel() {
		indentLevel--;
	}
	
}