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/*
* Copyright 2004-2005 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.layoutmgr;
/**
* The interface for LayoutManagers which generate block areas
*/
public interface BlockLevelLayoutManager extends LayoutManager {
/** Adjustment class: no adjustment */
int NO_ADJUSTMENT = -1;
/** Adjustment class: adjustment for space-before */
int SPACE_BEFORE_ADJUSTMENT = 0;
/** Adjustment class: adjustment for space-after */
int SPACE_AFTER_ADJUSTMENT = 1;
/** Adjustment class: adjustment for number of lines */
int LINE_NUMBER_ADJUSTMENT = 2;
/** Adjustment class: adjustment for line height */
int LINE_HEIGHT_ADJUSTMENT = 3;
int negotiateBPDAdjustment(int adj, KnuthElement lastElement);
void discardSpace(KnuthGlue spaceGlue);
/**
* @return true if this element must be kept together
*/
boolean mustKeepTogether();
/**
* @return true if this element must be kept with the previous element.
*/
boolean mustKeepWithPrevious();
/**
* @return true if this element must be kept with the next element.
*/
boolean mustKeepWithNext();
}
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