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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.layoutmgr;
import org.apache.fop.fo.Constants;
import org.apache.fop.fo.properties.BreakPropertySet;
import org.apache.fop.util.BreakUtil;
/**
* Helper implementations of the {@link BreakOpportunity} methods.
*/
public final class BreakOpportunityHelper {
private BreakOpportunityHelper() { }
/**
* Returns the break opportunity before the given layout manager. There is a break
* opportunity if the LM's FO has the break-before property set, or if there is a
* break opportunity before its first child LM.
*
* @return the break-before value (Constants.EN_*)
*/
public static int getBreakBefore(AbstractLayoutManager layoutManager) {
int breakBefore = Constants.EN_AUTO;
if (layoutManager.getFObj() instanceof BreakPropertySet) {
breakBefore = ((BreakPropertySet) layoutManager.getFObj()).getBreakBefore();
}
LayoutManager childLM = layoutManager.getChildLM();
// It is assumed this is only called when the first LM is active.
if (childLM instanceof BreakOpportunity) {
BreakOpportunity bo = (BreakOpportunity) childLM;
breakBefore = BreakUtil.compareBreakClasses(breakBefore, bo.getBreakBefore());
}
return breakBefore;
}
}
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