org.conqat.lib.commons.string.LineOffsetUtils Maven / Gradle / Ivy

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Provides common utility functions

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/*
 * Copyright (c) CQSE GmbH
 *
 * 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 org.conqat.lib.commons.string;

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

import org.conqat.lib.commons.region.LineBasedRegion;
import org.conqat.lib.commons.region.OffsetBasedRegion;

/**
 * Utilities to convert character-based regions to line-based regions
 */
public class LineOffsetUtils {

	/**
	 * Converts the given regions from offset-based to line-based using the given text.
	 */
	public static List convertToLineRegions(List regions, String text) {
		LineOffsetConverter lineOffsetConverter = new LineOffsetConverter(text);
		List result = new ArrayList<>();
		for (OffsetBasedRegion region : regions) {
			result.add(convertToLineRegion(region, lineOffsetConverter));
		}
		return result;
	}

	/** Creates a new line-based region from a offset-based region. */
	public static LineBasedRegion convertToLineRegion(OffsetBasedRegion region,
			LineOffsetConverter lineOffsetConverter) {
		int startLine = lineOffsetConverter.getLine(region.getStart());
		int endLine = lineOffsetConverter.getLine(region.getEnd());
		return new LineBasedRegion(startLine, endLine);
	}
}