org.apache.fop.pdf.PDFParentTree 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: PDFParentTree.java 1411352 2012-11-19 18:53:11Z vhennebert $ */
package org.apache.fop.pdf;
/**
* Class representing a PDF /ParentTree.
*/
public class PDFParentTree extends PDFNumberTreeNode {
private static final int MAX_NUMS_ARRAY_SIZE = 50;
public PDFParentTree() {
put("Kids", new PDFArray());
}
@Override
public void addToNums(int num, Object object) {
int arrayIndex = num / MAX_NUMS_ARRAY_SIZE;
setNumOfKidsArrays(arrayIndex + 1);
insertItemToNumsArray(arrayIndex, num, object);
}
private void setNumOfKidsArrays(int numKids) {
for (int i = getKids().length(); i < numKids; i++) {
PDFNumberTreeNode newArray = new PDFNumberTreeNode();
newArray.setNums(new PDFNumsArray(newArray));
newArray.setLowerLimit(i * MAX_NUMS_ARRAY_SIZE);
newArray.setUpperLimit(i * MAX_NUMS_ARRAY_SIZE);
addKid(newArray);
}
}
/**
* Registers a child object and adds it to the Kids array.
* @param kid The child PDF object to be added
*/
private void addKid(PDFObject kid) {
assert getDocument() != null;
getDocument().assignObjectNumber(kid);
getDocument().addTrailerObject(kid);
((PDFArray) get("Kids")).add(kid);
}
private void insertItemToNumsArray(int array, int num, Object object) {
assert getKids().get(array) instanceof PDFNumberTreeNode;
PDFNumberTreeNode numsArray = (PDFNumberTreeNode) getKids().get(array);
numsArray.addToNums(num, object);
}
}