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- /*
- * 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.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 {
-
- /**
- * @return 0 (there are no arguments for body-start)
- */
- public int nbArgs() {
- return 0;
- }
-
- /**
- * @param args array of arguments (none are used, but this is required by
- * the Function interface)
- * @param pInfo PropertyInfo object to be evaluated
- * @return numeric object containing the calculated body-start value
- * @throws PropertyException if called from outside of an fo:list-item
- */
- 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);
- }
-
- }
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