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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;
/**
* This is the super class for KnuthBox, KnuthGlue and KnuthPenalty.
*
* It stores information common to all sub classes, and the methods to get it:
* the width, a Position and a boolean marking KnuthElements used for some
* special feature (for example, the additional elements used to represent
* a space when text alignment is right, left or center).
*/
public abstract class KnuthElement extends ListElement {
/** The value used as an infinite indicator. */
public static final int INFINITE = 1000;
private int width;
private boolean bIsAuxiliary;
/**
* Create a new KnuthElement.
* This class being abstract, this can be called only by subclasses.
*
* @param w the width of this element
* @param pos the Position stored in this element
* @param bAux is this an auxiliary element?
*/
protected KnuthElement(int w, Position pos, boolean bAux) {
super(pos);
width = w;
bIsAuxiliary = bAux;
}
/** @return true if this element is an auxiliary one. */
public boolean isAuxiliary() {
return bIsAuxiliary;
}
/** @return the width of this element. */
public int getW() {
return width;
}
/** @return the penalty value of this element, if applicable. */
public int getP() {
throw new RuntimeException("Element is not a penalty");
}
/** @return the stretch value of this element, if applicable. */
public int getY() {
throw new RuntimeException("Element is not a glue");
}
/** @return the shrink value of this element, if applicable. */
public int getZ() {
throw new RuntimeException("Element is not a glue");
}
/** @see org.apache.fop.layoutmgr.ListElement#isUnresolvedElement() */
public boolean isUnresolvedElement() {
return false;
}
}
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