fop/src/java/org/apache/fop/fo/properties/SpacePropertyMaker.java

/*
 * Copyright 2005 The Apache Software Foundation.
 *
 * Licensed 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.fo.properties;

import org.apache.fop.fo.Constants;
import org.apache.fop.fo.PropertyList;
import org.apache.fop.fo.expr.PropertyException;

/**
 * Special CorrespondingPropertyMaker that sets the conditionality subproperty
 * correctly for space-* properties.
 */
public class SpacePropertyMaker extends CorrespondingPropertyMaker {

    /**
     * @param baseMaker base property maker
     */
    public SpacePropertyMaker(PropertyMaker baseMaker) {
        super(baseMaker);
    }

    /**
     * @see org.apache.fop.fo.properties.CorrespondingPropertyMaker#compute(PropertyList)
     */
    public Property compute(PropertyList propertyList) throws PropertyException {
        Property prop = super.compute(propertyList);
        if (prop != null && prop instanceof SpaceProperty) {
            ((SpaceProperty)prop).setConditionality(
                    new EnumProperty(Constants.EN_RETAIN, "RETAIN"), false);
        }
        return prop;
    }
}