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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.IOException;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import org.apache.fop.render.afp.tools.BinaryUtils;
/**
* The Include Page Segment structured field references a page segment resource
* object that is to be presented on the page or overlay presentation space. The IPS
* specifies a reference point on the including page or overlay coordinate system that
* may be used to position objects contained in the page segment. A page segment
* can be referenced at any time during page or overlay state, but not during an
* object state. The page segment inherits the active environment group definition of
* the including page or overlay.
*
* Note : No use for Triplets.
*
* A 'real' example for where this will be used is for
* the dynamic placing of overlay objects, such as signatures
* that may have to be placed at different positions on a document.
*
*/
public class IncludePageSegment extends AbstractNamedAFPObject{
/**
* The x position where we need to put this object on the page
*/
private byte [] _xCoor;
/**
* The y position where we need to put this object on the page
*/
private byte [] _yCoor;
/**
* Constructor for the Include Page Segment
* @param name Name of the page segment
* @param xVal The x position
* @param yVal The y position
*/
public IncludePageSegment(String name, int xVal, int yVal){
super(name);
_xCoor = BinaryUtils.convert(xVal, 3);
_yCoor = BinaryUtils.convert(yVal, 3);
}
/**
* Accessor method to write the AFP datastream for the Include Page Segment
* @param os The stream to write to
* @throws java.io.IOException
*/
public void writeDataStream(OutputStream os)
throws IOException {
byte[] data = new byte[23]; //(9 +14)
data[0] = 0x5A;
// Set the total record length
byte[] rl1 = BinaryUtils.convert(22, 2); //Ignore first byte
data[1] = rl1[0];
data[2] = rl1[1];
// Structured field ID for a IPS
data[3] = (byte) 0xD3;
data[4] = (byte) 0xAF;
data[5] = (byte) 0x5F;
data[6] = 0x00; // Reserved
data[7] = 0x00; // Reserved
data[8] = 0x00; // Reserved
for (int i = 0; i < _nameBytes.length; i++) {
data[9 + i] = _nameBytes[i];
}
data[17] = _xCoor[0]; // x coordinate
data[18] = _xCoor[1];
data[19] = _xCoor[2];
data[20] = _yCoor[0]; // y coordinate
data[21] = _yCoor[1];
data[22] = _yCoor[2];
os.write(data);
}
}
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