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/*
 * Copyright 2010-2016, Sikuli.org, sikulix.com
 * Released under the MIT License.
 *
 * added Kelthuzad 2013
 */
package org.sikuli.script.compare;

import java.util.Comparator;

import org.sikuli.script.Region;

/**
 * Compares the Regions by y-position.
 */
public class VerticalComparator implements Comparator {

    /**
     * Compares the Y-Position of two {@link Region} objects.
     * @param region1 The first {@link Region} object
     * @param region2 The second {@link Region} object
     * @return
     * 
     * -1 if the y-position of region1 is smaller
     * 0 if the y-positions are equal
     * 1 if the y-position of region2 is smaller
     * 
     */
    @Override
    public int compare(Region region1, Region region2) {
        if (region1 == region2) {
            return 0;
        }

        if (region1.getY() == region2.getY()) {
            return 0;
        }

        return region1.getY() < region2.getY() ? -1 : 1;
    }

}