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: SpaceElement.java 893238 2009-12-22 17:20:51Z vhennebert $ */ 19 20 package org.apache.fop.layoutmgr; 21 22 import org.apache.fop.datatypes.PercentBaseContext; 23 import org.apache.fop.fo.Constants; 24 import org.apache.fop.fo.properties.SpaceProperty; 25 import org.apache.fop.traits.MinOptMax; 26 27 /** 28 * This class represents an unresolved space element. 29 */ 30 public class SpaceElement extends UnresolvedListElementWithLength { 31 32 private int precedence; 33 34 /** 35 * Main constructor 36 * @param position the Position instance needed by the addAreas stage of the LMs. 37 * @param space the space property 38 * @param side the side to which this space element applies. 39 * @param isFirst true if this is a space-before of the first area generated. 40 * @param isLast true if this is a space-after of the last area generated. 41 * @param context the property evaluation context 42 */ SpaceElement(Position position, SpaceProperty space, RelSide side, boolean isFirst, boolean isLast, PercentBaseContext context)43 public SpaceElement(Position position, SpaceProperty space, RelSide side, boolean isFirst, 44 boolean isLast, PercentBaseContext context) { 45 super(position, space.getSpace().getLengthRange().toMinOptMax(context), side, 46 space.isDiscard(), isFirst, isLast); 47 int en = space.getSpace().getPrecedence().getEnum(); 48 if (en == Constants.EN_FORCE) { 49 this.precedence = Integer.MAX_VALUE; 50 } else { 51 this.precedence = space.getSpace().getPrecedence().getNumber().intValue(); 52 } 53 } 54 55 /** @return true if the space is forcing. */ isForcing()56 public boolean isForcing() { 57 return this.precedence == Integer.MAX_VALUE; 58 } 59 60 /** @return the precedence of the space */ getPrecedence()61 public int getPrecedence() { 62 return this.precedence; 63 } 64 65 /** {@inheritDoc} */ notifyLayoutManager(MinOptMax effectiveLength)66 public void notifyLayoutManager(MinOptMax effectiveLength) { 67 LayoutManager lm = getOriginatingLayoutManager(); 68 if (lm instanceof ConditionalElementListener) { 69 ((ConditionalElementListener)lm).notifySpace( 70 getSide(), effectiveLength); 71 } else { 72 log.warn("Cannot notify LM. It does not implement ConditionalElementListener:" 73 + lm.getClass().getName()); 74 } 75 } 76 77 /** {@inheritDoc} */ toString()78 public String toString() { 79 StringBuffer sb = new StringBuffer("Space["); 80 sb.append(super.toString()); 81 sb.append(", precedence="); 82 if (isForcing()) { 83 sb.append("forcing"); 84 } else { 85 sb.append(getPrecedence()); 86 } 87 sb.append("]"); 88 return sb.toString(); 89 } 90 91 } 92