/*
 * 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: KnuthPenalty.java 198474 2005-03-08 15:03:06Z jeremias $ */

package org.apache.fop.layoutmgr;

/**
 * An instance of this class represents information about a feasible
 * breaking point; it does not represent any piece of content.
 * 
 * A KnuthPenalty is a feasible breaking point unless its value is infinity;
 * a KnuthPenalty whose value is -infinity represents a forced break.
 * 
 * A KnuthPenalty is suppressed, and its width is ignored, if it is not a
 * chosen breaking point; for example, a KnuthPenalty representing a
 * hyphenation point has a width (the "-" width), which must be ignored if
 * that point is not chosen as a breaking point.
 * 
 * Besides the inherited methods and attributes, this class has two more
 * attributes and the methods used to get them: the penalty value, which is
 * a kind of "aesthetic cost" (the higher the value, the more unsightly the
 * breaking point), and a boolean that marks KnuthPenalties which should not
 * be chosen as breaking points for consecutive lines.
 */
public class KnuthPenalty extends KnuthElement {
    private int penalty;
    private boolean bFlagged; 

    /**
     * Create a new KnuthPenalty.
     *
     * @param w the width of this penalty
     * @param p the penalty value of this penalty
     * @param f is this penalty flagged?
     * @param pos the Position stored in this penalty
     * @param bAux is this penalty auxiliary?
     */
    public KnuthPenalty(int w, int p, boolean f, Position pos, boolean bAux) {
        super(w, pos, bAux);
        penalty = p;
        bFlagged = f;
    }

    public boolean isPenalty() {
        return true;
    }

    /**
     * Return the penalty value of this penalty.
     */
    public int getP() {
        return penalty;
    }

    /**
     * Return true is this penalty is a flagged one.
     */
    public boolean isFlagged() {
        return bFlagged;
    }

    public boolean isForcedBreak() {
        return penalty == -KnuthElement.INFINITE;
    }
}