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: ConditionalElementListener.java 679326 2008-07-24 09:35:34Z vhennebert $ */ 19 20 package org.apache.fop.layoutmgr; 21 22 import org.apache.fop.traits.MinOptMax; 23 24 /** 25 * This interface is used to notify layout managers about the situation around spaces, borders 26 * and padding just before the addArea() method is called when a part is being painted. 27 */ 28 public interface ConditionalElementListener { 29 30 /** 31 * Notifies the layout manager about the effective length of its space. 32 * @param side the side to which the space applies 33 * @param effectiveLength the effective length after space-resolution (null means zero length) 34 */ notifySpace(RelSide side, MinOptMax effectiveLength)35 void notifySpace(RelSide side, MinOptMax effectiveLength); 36 37 /** 38 * Notifies the layout manager about the effective length/width of its border. 39 * @param side the side to which the border applies 40 * @param effectiveLength the effective length in the current break situation 41 * (null means zero length) 42 */ notifyBorder(RelSide side, MinOptMax effectiveLength)43 void notifyBorder(RelSide side, MinOptMax effectiveLength); 44 45 /** 46 * Notifies the layout manager about the effective length/width of its padding. 47 * @param side the side to which the padding applies 48 * @param effectiveLength the effective length in the current break situation 49 * (null means zero length) 50 */ notifyPadding(RelSide side, MinOptMax effectiveLength)51 void notifyPadding(RelSide side, MinOptMax effectiveLength); 52 53 } 54