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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.pdf;
import java.io.IOException;
import java.io.OutputStream;
/**
* Navigation Node Dictionary, which we call a 'navigator'.
* This class is used to for sub-page navigation.
*/
public class PDFNavigator extends PDFIdentifiedDictionary {
public abstract static class Resolver {
private boolean resolved;
private PDFNavigator navigator;
private Object extension;
public Resolver(PDFNavigator navigator, Object extension) {
this.navigator = navigator;
this.extension = extension;
}
public PDFNavigator getNavigator() {
return navigator;
}
public Object getExtension() {
return extension;
}
public void resolve() {
if (!resolved) {
performResolution();
resolved = true;
}
}
protected void performResolution() {
}
}
private Resolver resolver;
public PDFNavigator(String id) {
super(id);
put("Type", new PDFName("NavNode"));
}
@Override
public int output(OutputStream stream) throws IOException {
if (resolver != null) {
resolver.resolve();
}
return super.output(stream);
}
public void setResolver(Resolver resolver) {
this.resolver = resolver;
}
public void populate(Object nextAction, Object nextNode, Object prevAction, Object prevNode, Object duration) {
if (nextAction != null) {
put("NA", nextAction);
}
if (nextNode != null) {
put("Next", nextNode);
}
if (prevAction != null) {
put("PA", prevAction);
}
if (prevNode != null) {
put("Prev", prevNode);
}
if (duration != null) {
put("Dur", duration);
}
}
}
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