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/*
* Copyright 1999-2004 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.traits;
/**
* This class holds the resolved (as mpoints) form of a LengthRange or
* Space type Property value.
* MinOptMax values are used during layout calculations. The instance
* variables are package visible.
*/
public class MinOptMax implements java.io.Serializable, Cloneable {
/** Publicly visible min(imum), opt(imum) and max(imum) values.*/
public int min;
public int opt;
public int max;
/**
* New min/opt/max with zero values.
*/
public MinOptMax() {
this(0);
}
/**
* New min/opt/max with one fixed value.
*
* @param val the value for min, opt and max
*/
public MinOptMax(int val) {
this(val, val, val);
}
/**
* New min/opt/max with the three values.
*
* @param min the minimum value
* @param opt the optimum value
* @param max the maximum value
*/
public MinOptMax(int min, int opt, int max) {
this.min = min;
this.opt = opt;
this.max = max;
}
/**
* @see java.lang.Object#clone()
*/
public Object clone() {
try {
return super.clone();
} catch (CloneNotSupportedException ex) {
// SHOULD NEVER OCCUR - all members are primitive types!
return null;
}
}
/**
* Subtracts one MinOptMax instance from another returning a new one.
* @param op1 first instance to subtract from
* @param op2 second instance
* @return MinOptMax new instance
*/
public static MinOptMax subtract(MinOptMax op1, MinOptMax op2) {
return new MinOptMax(op1.min - op2.max, op1.opt - op2.opt,
op1.max - op2.min);
}
/**
* Adds one MinOptMax instance to another returning a new one.
* @param op1 first instance
* @param op2 second instance
* @return MinOptMax new instance
*/
public static MinOptMax add(MinOptMax op1, MinOptMax op2) {
return new MinOptMax(op1.min + op2.min, op1.opt + op2.opt,
op1.max + op2.max);
}
/**
* Multiplies a MinOptMax instance with a factor returning a new instance.
* @param op1 MinOptMax instance
* @param mult multiplier
* @return MinOptMax new instance
*/
public static MinOptMax multiply(MinOptMax op1, double mult) {
return new MinOptMax((int)(op1.min * mult),
(int)(op1.opt * mult), (int)(op1.max * mult));
}
/**
* Adds another MinOptMax instance to this one.
* @param op the other instance
*/
public void add(MinOptMax op) {
min += op.min;
opt += op.opt;
max += op.max;
}
/**
* Subtracts from this instance using another.
* @param op the other instance
*/
public void subtract(MinOptMax op) {
min -= op.max;
opt -= op.opt;
max -= op.min;
}
public String toString() {
return "MinOptMax: min=" + min + "; opt=" + opt + "; max=" + max;
}
}
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