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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.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 Overlay structured field references an overlay resource
* definition that is to be positioned on the page. A page overlay can be
* referenced at any time during the page state, but not during an object state.
* The overlay contains its own active environment group definition.
*
* Note: There is no need for the triplets, so I have ignored them.
*
* A real example of where this will be used is for static overlays, such as an
* address on the page.
*
*/
public class IncludePageOverlay extends AbstractNamedAFPObject {
/**
* The x coordinate
*/
private int _xCoor = 0;
/**
* The y coordinate
*/
private int _yCoor = 0;
/**
* The orientation
*/
private int _orientation = 0;
/**
* Constructor for the Include Page Overlay
* @param overlayName Name of the page segment
* @param x The x position
* @param y The y position
* @param orientation The orientation
*/
public IncludePageOverlay(String overlayName, int x, int y, int orientation) {
super(overlayName);
_xCoor = x;
_yCoor = y;
setOrientation(orientation);
}
/**
* Sets the orienation to use for the overlay.
*
* @param orientation
* The orientation (0,90, 180, 270)
*/
public void setOrientation(int orientation) {
if (orientation == 0 || orientation == 90 || orientation == 180
|| orientation == 270) {
_orientation = orientation;
} else {
throw new IllegalArgumentException(
"The orientation must be one of the values 0, 90, 180, 270");
}
}
/**
* Accessor method to write the AFP datastream for the Include Page Overlay
* @param os The stream to write to
* @throws java.io.IOException
*/
public void writeDataStream(OutputStream os)
throws IOException {
byte[] data = new byte[25]; //(9 +16)
data[0] = 0x5A;
// Set the total record length
byte[] rl1 = BinaryUtils.convert(24, 2); //Ignore first byte
data[1] = rl1[0];
data[2] = rl1[1];
// Structured field ID for a IPO
data[3] = (byte) 0xD3;
data[4] = (byte) 0xAF;
data[5] = (byte) 0xD8;
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];
}
byte[] r2 = BinaryUtils.convert(_xCoor, 3);
data[17] = r2[0]; // x coordinate
data[18] = r2[1];
data[19] = r2[2];
byte[] r3 = BinaryUtils.convert(_yCoor, 3);
data[20] = r3[0]; // y coordinate
data[21] = r3[1];
data[22] = r3[2];
switch (_orientation) {
case 90:
data[23] = 0x2D;
data[24] = 0x00;
break;
case 180:
data[23] = 0x5A;
data[24] = 0x00;
break;
case 270:
data[23] = (byte) 0x87;
data[24] = 0x00;
break;
default:
data[23] = 0x00;
data[24] = 0x00;
break;
}
os.write(data);
}
}
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