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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 org.apache.fop.datatypes.CompoundDatatype;
import org.apache.fop.datatypes.Length;
import org.apache.fop.datatypes.PercentBaseContext;
import org.apache.fop.fo.Constants;
import org.apache.fop.fo.FObj;
import org.apache.fop.fo.PropertyList;
import org.apache.fop.fo.expr.PropertyException;
/**
* Superclass for properties that have conditional lengths
*/
public class CondLengthProperty extends Property implements CompoundDatatype {
private Property length;
private EnumProperty conditionality;
/**
* Inner class for creating instances of CondLengthProperty
*/
public static class Maker extends CompoundPropertyMaker {
/**
* @param propId the id of the property for which a Maker should be created
*/
public Maker(int propId) {
super(propId);
}
/**
* Create a new empty instance of CondLengthProperty.
* @return the new instance.
*/
public Property makeNewProperty() {
return new CondLengthProperty();
}
/**
* {@inheritDoc}
*/
public Property convertProperty(Property p, PropertyList propertyList, FObj fo)
throws PropertyException {
if (p instanceof KeepProperty) {
return p;
}
return super.convertProperty(p, propertyList, fo);
}
}
/**
* {@inheritDoc}
*/
public void setComponent(int cmpId, Property cmpnValue,
boolean bIsDefault) {
if (cmpId == CP_LENGTH) {
length = cmpnValue;
} else if (cmpId == CP_CONDITIONALITY) {
conditionality = (EnumProperty)cmpnValue;
}
}
/**
* {@inheritDoc}
*/
public Property getComponent(int cmpId) {
if (cmpId == CP_LENGTH) {
return length;
} else if (cmpId == CP_CONDITIONALITY) {
return conditionality;
} else {
return null;
}
}
/**
* Returns the conditionality.
* @return the conditionality
*/
public Property getConditionality() {
return this.conditionality;
}
/**
* Returns the length.
* @return the length
*/
public Property getLengthComponent() {
return this.length;
}
/**
* Indicates if the length can be discarded on certain conditions.
* @return true if the length can be discarded.
*/
public boolean isDiscard() {
return this.conditionality.getEnum() == Constants.EN_DISCARD;
}
/**
* Returns the computed length value.
* @return the length in millipoints
*/
public int getLengthValue() {
return this.length.getLength().getValue();
}
/**
* Returns the computed length value.
* @param context The context for the length calculation (for percentage based lengths)
* @return the length in millipoints
*/
public int getLengthValue(PercentBaseContext context) {
return this.length.getLength().getValue(context);
}
/** {@inheritDoc} */
public String toString() {
return "CondLength[" + length.getObject().toString()
+ ", " + (isDiscard()
? conditionality.toString().toLowerCase()
: conditionality.toString()) + "]";
}
/**
* @return this.condLength
*/
public CondLengthProperty getCondLength() {
return this;
}
/**
* TODO: Should we allow this?
* @return this.condLength cast as a Length
*/
public Length getLength() {
return length.getLength();
}
/**
* @return this.condLength cast as an Object
*/
public Object getObject() {
return this;
}
}
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