1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 /* $Id $ */ 19 20 package org.apache.fop.datatypes; 21 22 import org.apache.fop.fo.FObj; 23 24 /** 25 * This interface is used by the layout managers to provide relevant information 26 * back to the property percentage resolution logic, that is 27 * the percentages based property getValue() functions expect an object implementing 28 * this interface as an argument. 29 */ 30 public interface PercentBaseContext { 31 32 /** 33 * Returns the base length for the given length base. 34 * Length base should be one of the constants defined in {@link LengthBase}. 35 * @param lengthBase Indicates which type of the base length value is to be returned 36 * @param fobj The FO object against which the percentage should be evaluated 37 * @return The base length value of the given kind 38 */ 39 public int getBaseLength(int lengthBase, FObj fobj); 40 41 } 42