/*
* 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: BodyStartFunction.java 1328964 2012-04-22 20:09:49Z gadams $ */
package org.apache.fop.fo.expr;
import org.apache.fop.datatypes.Numeric;
import org.apache.fop.fo.Constants;
import org.apache.fop.fo.PropertyList;
import org.apache.fop.fo.flow.ListItem;
import org.apache.fop.fo.properties.Property;
/**
* Class corresponding to the body-start Property Value function. See Sec.
* 5.10.4 of the XSL-FO spec.
*/
public class BodyStartFunction extends FunctionBase {
/** {@inheritDoc} */
public int getRequiredArgsCount() {
return 0;
}
/** {@inheritDoc} */
public Property eval(Property[] args, PropertyInfo pInfo) throws PropertyException {
Numeric distance
= pInfo.getPropertyList()
.get(Constants.PR_PROVISIONAL_DISTANCE_BETWEEN_STARTS).getNumeric();
PropertyList pList = pInfo.getPropertyList();
while (pList != null && !(pList.getFObj() instanceof ListItem)) {
pList = pList.getParentPropertyList();
}
if (pList == null) {
throw new PropertyException("body-start() called from outside an fo:list-item");
}
Numeric startIndent = pList.get(Constants.PR_START_INDENT).getNumeric();
return (Property) NumericOp.addition(distance, startIndent);
}
}