/*
* $Id: PercentLength.java,v 1.4.2.1 2003/02/25 10:48:28 jeremias Exp $
* ============================================================================
* The Apache Software License, Version 1.1
* ============================================================================
*
* Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modifica-
* tion, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. The end-user documentation included with the redistribution, if any, must
* include the following acknowledgment: "This product includes software
* developed by the Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself, if
* and wherever such third-party acknowledgments normally appear.
*
* 4. The names "FOP" and "Apache Software Foundation" must not be used to
* endorse or promote products derived from this software without prior
* written permission. For written permission, please contact
* apache@apache.org.
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* 5. Products derived from this software may not be called "Apache", nor may
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* ============================================================================
*
* This software consists of voluntary contributions made by many individuals
* on behalf of the Apache Software Foundation and was originally created by
* James Tauber <jtauber@jtauber.com>. For more information on the Apache
* Software Foundation, please see <http://www.apache.org/>.
*/
package org.apache.fop.datatypes;
import org.apache.fop.fo.expr.Numeric;
/**
* a percent specified length quantity in XSL
*/
public class PercentLength extends Length {
private double factor;
private PercentBase lbase = null;
/**
* construct an object based on a factor (the percent, as a
* a factor) and an object which has a method to return the
* Length which provides the "base" for this calculation.
*/
public PercentLength(double factor) {
this(factor, null);
}
public PercentLength(double factor, PercentBase lbase) {
this.factor = factor;
this.lbase = lbase;
}
public void setBaseLength(PercentBase lbase) {
this.lbase = lbase;
}
public PercentBase getBaseLength() {
return this.lbase;
}
/**
* Return the computed value in millipoints. This assumes that the
* base length has been resolved to an absolute length value.
*/
protected void computeValue() {
setComputedValue((int)(factor * (double)lbase.getBaseLength()));
}
public double value() {
return factor;
}
public String toString() {
// return the factor as a percent
// What about the base value?
return (new Double(factor * 100.0).toString()) + "%";
}
public Numeric asNumeric() {
return new Numeric(this);
}
}