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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.
- */
-
- /* $Id$ */
-
- package org.apache.fop.util;
-
- import org.apache.fop.fo.Constants;
-
- /**
- * A utility class for manipulating break classes (the break-before and break-after properties).
- */
- public final class BreakUtil {
-
- private BreakUtil() { }
-
- // TODO replace that with a proper 1.5 enumeration ASAP
- private static int getBreakClassPriority(int breakClass) {
- switch (breakClass) {
- case Constants.EN_AUTO: return 0;
- case Constants.EN_COLUMN: return 1;
- case Constants.EN_PAGE: return 2;
- case Constants.EN_EVEN_PAGE: return 3;
- case Constants.EN_ODD_PAGE: return 3;
- default: throw new IllegalArgumentException(
- "Illegal value for breakClass: " + breakClass);
- }
- }
-
- /**
- * Compares the given break classes and return the one that wins. even-page and
- * odd-page win over page, which wins over column, which wins over auto. If even-page
- * and odd-page are compared to each other, which one will be returned is undefined.
- *
- * @param break1 a break class, one of {@link Constants#EN_AUTO},
- * {@link Constants#EN_COLUMN}, {@link Constants#EN_PAGE},
- * {@link Constants#EN_EVEN_PAGE}, {@link Constants#EN_ODD_PAGE}
- * @param break2 another break class
- * @return the break class that wins the comparison
- */
- public static int compareBreakClasses(int break1, int break2) {
- // TODO implement some warning mechanism if even-page and odd-page are being compared
- int p1 = getBreakClassPriority(break1);
- int p2 = getBreakClassPriority(break2);
- if (p1 < p2) {
- return break2;
- } else {
- return break1;
- }
- }
-
- }
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