| /* |
| * 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.layoutmgr; |
| |
| import org.apache.fop.datatypes.PercentBaseContext; |
| import org.apache.fop.fo.Constants; |
| import org.apache.fop.fo.properties.SpaceProperty; |
| import org.apache.fop.traits.MinOptMax; |
| |
| /** |
| * This class represents an unresolved space element. |
| */ |
| public class SpaceElement extends UnresolvedListElementWithLength { |
| |
| private int precedence; |
| |
| /** |
| * Main constructor |
| * @param position the Position instance needed by the addAreas stage of the LMs. |
| * @param space the space property |
| * @param side the side to which this space element applies. |
| * @param isFirst true if this is a space-before of the first area generated. |
| * @param isLast true if this is a space-after of the last area generated. |
| * @param context the property evaluation context |
| */ |
| public SpaceElement(Position position, SpaceProperty space, RelSide side, |
| boolean isFirst, boolean isLast, |
| PercentBaseContext context) { |
| super(position, |
| MinOptMaxUtil.toMinOptMax( |
| space.getSpace().getLengthRange(), |
| context), side, space.isDiscard(), isFirst, isLast); |
| int en = space.getSpace().getPrecedence().getEnum(); |
| if (en == Constants.EN_FORCE) { |
| this.precedence = Integer.MAX_VALUE; |
| } else { |
| this.precedence = space.getSpace().getPrecedence().getNumber().intValue(); |
| } |
| } |
| |
| /** @return true if the space is forcing. */ |
| public boolean isForcing() { |
| return this.precedence == Integer.MAX_VALUE; |
| } |
| |
| /** @return the precedence of the space */ |
| public int getPrecedence() { |
| return this.precedence; |
| } |
| |
| /** {@inheritDoc} */ |
| public void notifyLayoutManager(MinOptMax effectiveLength) { |
| LayoutManager lm = getOriginatingLayoutManager(); |
| if (lm instanceof ConditionalElementListener) { |
| ((ConditionalElementListener)lm).notifySpace( |
| getSide(), effectiveLength); |
| } else { |
| log.warn("Cannot notify LM. It does not implement ConditionalElementListener:" |
| + lm.getClass().getName()); |
| } |
| } |
| |
| /** {@inheritDoc} */ |
| public String toString() { |
| StringBuffer sb = new StringBuffer("Space["); |
| sb.append(super.toString()); |
| sb.append(", precedence="); |
| if (isForcing()) { |
| sb.append("forcing"); |
| } else { |
| sb.append(getPrecedence()); |
| } |
| sb.append("]"); |
| return sb.toString(); |
| } |
| |
| } |