Copyright (c) 2000, 2013 IBM Corporation and others.
This program and the accompanying materials
are made available under the terms of the Eclipse Public License 2.0
which accompanies this distribution, and is available at
https://www.eclipse.org/legal/epl-2.0/
SPDX-License-Identifier: EPL-2.0
Contributors:
    IBM Corporation - initial API and implementation
/*******************************************************************************
 * Copyright (c) 2000, 2013 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jdt.internal.core.dom.rewrite;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.jdt.core.formatter.IndentManipulation;
import org.eclipse.text.edits.ISourceModifier;
import org.eclipse.text.edits.ReplaceEdit;


@SuppressWarnings({"rawtypes", "unchecked"})
public class SourceModifier implements ISourceModifier {

	private final String destinationIndent;
	private final int sourceIndentLevel;
	private final int tabWidth;
	private final int indentWidth;

	public SourceModifier(int sourceIndentLevel, String destinationIndent, int tabWidth, int indentWidth) {
		this.destinationIndent= destinationIndent;
		this.sourceIndentLevel= sourceIndentLevel;
		this.tabWidth= tabWidth;
		this.indentWidth= indentWidth;
	}

	@Override
	public ISourceModifier copy() {
		// We are state less
		return this;
	}

	@Override
	public ReplaceEdit[] getModifications(String source) {
		List result= new ArrayList();
		int destIndentLevel= IndentManipulation.measureIndentUnits(this.destinationIndent, this.tabWidth, this.indentWidth);
		if (destIndentLevel == this.sourceIndentLevel) {
			return (ReplaceEdit[])result.toArray(new ReplaceEdit[result.size()]);
		}
		return IndentManipulation.getChangeIndentEdits(source, this.sourceIndentLevel, this.tabWidth, this.indentWidth, this.destinationIndent);
	}
}