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/* ====================================================================
   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.
==================================================================== */

package org.apache.poi.ss.formula.ptg;

/**
 * Common interface for AreaPtg and Area3DPtg, and their child classes.
 */
public interface AreaI {
	/**
	 * @return the first row in the area
	 */
	int getFirstRow();

	/**
	 * @return last row in the range (x2 in x1,y1-x2,y2)
	 */
	int getLastRow();

	/**
	 * @return the first column number in the area.
	 */
	int getFirstColumn();

	/**
	 * @return lastcolumn in the area
	 */
	int getLastColumn();

	class OffsetArea implements AreaI {

		private final int _firstColumn;
		private final int _firstRow;
		private final int _lastColumn;
		private final int _lastRow;

		public OffsetArea(int baseRow, int baseColumn, int relFirstRowIx, int relLastRowIx,
				int relFirstColIx, int relLastColIx) {
			_firstRow = baseRow + Math.min(relFirstRowIx, relLastRowIx);
			_lastRow = baseRow + Math.max(relFirstRowIx, relLastRowIx);
			_firstColumn = baseColumn + Math.min(relFirstColIx, relLastColIx);
			_lastColumn = baseColumn + Math.max(relFirstColIx, relLastColIx);
		}

		public int getFirstColumn() {
			return _firstColumn;
		}

		public int getFirstRow() {
			return _firstRow;
		}

		public int getLastColumn() {
			return _lastColumn;
		}

		public int getLastRow() {
			return _lastRow;
		}
	}
}