/* * 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; } } }