| /* |
| * 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; |
| } |
| } |
| |
| } |