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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.fo.properties;
import java.awt.Color;
import org.apache.fop.datatypes.Length;
import org.apache.fop.datatypes.Numeric;
import org.apache.fop.datatypes.PercentBaseContext;
import org.apache.fop.fo.FObj;
import org.apache.fop.fo.PropertyList;
import org.apache.fop.fo.expr.PropertyException;
/**
* Class for handling numeric properties
*/
public class NumberProperty extends Property implements Numeric {
/**
* Inner class for making NumberProperty objects
*/
public static class Maker extends PropertyMaker {
/**
* Constructor for NumberProperty.Maker
* @param propId the id of the property for which a Maker should be created
*/
public Maker(int propId) {
super(propId);
}
/**
* @throws PropertyException
* @see PropertyMaker#convertProperty
*/
public Property convertProperty(Property p,
PropertyList propertyList, FObj fo)
throws PropertyException {
if (p instanceof NumberProperty) {
return p;
}
if (p instanceof EnumProperty) {
return new EnumNumber(p);
}
Number val = p.getNumber();
if (val != null) {
return new NumberProperty(val);
}
return convertPropertyDatatype(p, propertyList, fo);
}
}
private Number number;
/**
* Constructor for Number input
* @param num Number object value for property
*/
public NumberProperty(Number num) {
this.number = num;
}
/**
* Constructor for double input
* @param num double numeric value for property
*/
public NumberProperty(double num) {
this.number = new Double(num);
}
/**
* Constructor for integer input
* @param num integer numeric value for property
*/
public NumberProperty(int num) {
this.number = new Integer(num);
}
/**
* Plain number always has a dimension of 0.
* @return a dimension of 0.
* @see Numeric#getDimension()
*/
public int getDimension() {
return 0;
}
/**
* Return the value of this Numeric.
* @return The value as a double.
* @see Numeric#getNumericValue()
*/
public double getNumericValue() {
return number.doubleValue();
}
/**
* Return the value of this Numeric.
* @param context Evaluation context
* @return The value as a double.
* @see Numeric#getNumericValue(PercentBaseContext)
*/
public double getNumericValue(PercentBaseContext context) {
return getNumericValue();
}
/** @see org.apache.fop.datatypes.Numeric#getValue() */
public int getValue() {
return number.intValue();
}
/**
* Return the value
* @param context Evaluation context
* @return The value as an int.
* @see Numeric#getValue(PercentBaseContext)
*/
public int getValue(PercentBaseContext context) {
return getValue();
}
/**
* Return true because all numbers are absolute.
* @return true.
* @see Numeric#isAbsolute()
*/
public boolean isAbsolute() {
return true;
}
/**
* @return this.number cast as a Number
*/
public Number getNumber() {
return this.number;
}
/**
* @return this.number cast as an Object
*/
public Object getObject() {
return this.number;
}
/**
* Convert NumberProperty to Numeric object
* @return Numeric object corresponding to this
*/
public Numeric getNumeric() {
return this;
}
/** @see org.apache.fop.fo.properties.Property#getLength() */
public Length getLength() {
//Assume pixels (like in HTML) when there's no unit
return new FixedLength(getNumericValue(), "px");
}
/**
* Convert NumberProperty to a Color. Not sure why this is needed.
* @return Color that corresponds to black
*/
public Color getColor() {
// TODO: Implement somehow
// Convert numeric value to color ???
// Convert to hexadecimal and then try to make it into a color?
return Color.black;
}
}
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