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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.properties.KeepProperty;
/**
* The interface for LayoutManagers which generate block areas
*/
public interface BlockLevelLayoutManager extends LayoutManager {
/**
* Negotiate BPD adjustment.
* @param adj amount to adjust
* @param lastElement the last knuth element
* @return the resulting adjusted BPD
*/
int negotiateBPDAdjustment(int adj, KnuthElement lastElement);
/**
* Discard space.
* @param spaceGlue the space
*/
void discardSpace(KnuthGlue spaceGlue);
/**
* Returns the keep-together strength for this element.
* @return the keep-together strength
*/
Keep getKeepTogether();
/**
* @return true if this element must be kept together
*/
boolean mustKeepTogether();
/**
* Returns the keep-with-previous strength for this element.
* @return the keep-with-previous strength
*/
Keep getKeepWithPrevious();
/**
* @return true if this element must be kept with the previous element.
*/
boolean mustKeepWithPrevious();
/**
* Returns the keep-with-next strength for this element.
* @return the keep-with-next strength
*/
Keep getKeepWithNext();
/**
* @return true if this element must be kept with the next element.
*/
boolean mustKeepWithNext();
/**
* Returns the keep-together property specified on the FObj.
* @return the keep-together property
*/
KeepProperty getKeepTogetherProperty();
/**
* Returns the keep-with-previous property specified on the FObj.
* @return the keep-together property
*/
KeepProperty getKeepWithPreviousProperty();
/**
* Returns the keep-with-next property specified on the FObj.
* @return the keep-together property
*/
KeepProperty getKeepWithNextProperty();
}
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