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/*
* Copyright 2006 The Apache Software Foundation.
*
* Licensed 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.render.afp.modca;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Iterator;
/**
*/
public class Overlay extends AbstractPageObject{
/**
* Construct a new overlay object for the specified name argument, the overlay
* name should be an 8 character identifier.
*
* @param name
* the name of the page.
* @param width
* the width of the page.
* @param height
* the height of the page.
* @param rotation
* the rotation of the page.
*/
public Overlay(String name, int width, int height, int rotation) {
super(name, width, height, rotation);
}
/**
* Accessor method to write the AFP datastream for the overlay.
*
* @param os The stream to write to
* @throws java.io.IOException
*/
public void writeDataStream(OutputStream os)
throws IOException {
writeStart(os);
_activeEnvironmentGroup.writeDataStream(os);
writeObjectList(_segments, os);
writeObjectList(_tagLogicalElements, os);
writeObjectList(_objects, os);
writeEnd(os);
}
/**
* Helper method to write the start of the overlay.
* @param os The stream to write to
*/
private void writeStart(OutputStream os)
throws IOException {
byte[] data = new byte[17];
data[0] = 0x5A; // Structured field identifier
data[1] = 0x00; // Length byte 1
data[2] = 0x10; // Length byte 2
data[3] = (byte) 0xD3; // Structured field id byte 1
data[4] = (byte) 0xA8; // Structured field id byte 2
data[5] = (byte) 0xDF; // Structured field id byte 3
data[6] = 0x00; // Flags
data[7] = 0x00; // Reserved
data[8] = 0x00; // Reserved
for (int i = 0; i < _nameBytes.length; i++) {
data[9 + i] = _nameBytes[i];
}
os.write(data);
}
/**
* Helper method to write the end of the overlay.
* @param os The stream to write to
*/
private void writeEnd(OutputStream os)
throws IOException {
byte[] data = new byte[17];
data[0] = 0x5A; // Structured field identifier
data[1] = 0x00; // Length byte 1
data[2] = 0x10; // Length byte 2
data[3] = (byte) 0xD3; // Structured field id byte 1
data[4] = (byte) 0xA9; // Structured field id byte 2
data[5] = (byte) 0xDF; // Structured field id byte 3
data[6] = 0x00; // Flags
data[7] = 0x00; // Reserved
data[8] = 0x00; // Reserved
for (int i = 0; i < _nameBytes.length; i++) {
data[9 + i] = _nameBytes[i];
}
os.write(data);
}
}
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