org.apache.fop.fo.properties.LengthProperty Maven / Gradle / Ivy
/*
* 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: LengthProperty.java 1303891 2012-03-22 17:04:12Z vhennebert $ */
package org.apache.fop.fo.properties;
import org.apache.xmlgraphics.util.UnitConv;
import org.apache.fop.datatypes.Length;
import org.apache.fop.datatypes.Numeric;
import org.apache.fop.fo.FObj;
import org.apache.fop.fo.PropertyList;
import org.apache.fop.fo.expr.PropertyException;
/**
* Superclass for properties wrapping a Length value.
*/
public abstract class LengthProperty extends Property
implements Length, Numeric {
/**
* Inner class for making instances of LengthProperty
*/
public static class Maker extends PropertyMaker {
/**
* Constructor
*
* @param propId the id of the property for which a Maker should be created
*/
public Maker(int propId) {
super(propId);
}
/** {@inheritDoc} */
@Override
public Property convertProperty(Property p,
PropertyList propertyList,
FObj fo) throws PropertyException {
if (p instanceof EnumProperty) {
return new EnumLength(p);
}
if (p instanceof LengthProperty) {
return p;
}
if (p instanceof NumberProperty) {
//Assume pixels (like in HTML) when there's no unit
float resolution = propertyList.getFObj().getUserAgent().getSourceResolution();
return FixedLength.getInstance(
p.getNumeric().getNumericValue(), "px",
UnitConv.IN2PT / resolution);
}
Length val = p.getLength();
if (val != null) {
return (Property) val;
}
/* always null ?? */
return convertPropertyDatatype(p, propertyList, fo);
}
}
/** @return the numeric dimension. Length always a dimension of 1 */
public int getDimension() {
return 1;
}
/** @return this.length cast as a Numeric */
@Override
public Numeric getNumeric() {
return this;
}
/** @return this.length */
@Override
public Length getLength() {
return this;
}
/** @return this.length cast as an Object */
@Override
public Object getObject() {
return this;
}
}