1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
|
/*
* 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;
/**
* An Object Environment Group (OEG) may be associated with an object and is contained
* within the object's begin-end envelope.
* The object environment group defines the object's origin and orientation on the page,
* and can contain font and color attribute table information. The scope of an object
* environment group is the scope of its containing object.
*
* An application that creates a data-stream document may omit some of the parameters
* normally contained in the object environment group, or it may specify that one or
* more default values are to be used.
*/
public final class ObjectEnvironmentGroup extends AbstractNamedAFPObject {
/**
* Default name for the object environment group
*/
private static final String DEFAULT_NAME = "OEG00001";
/**
* The ObjectAreaDescriptor for the object environment group
*/
private ObjectAreaDescriptor _objectAreaDescriptor = null;
/**
* The ObjectAreaPosition for the object environment group
*/
private ObjectAreaPosition _objectAreaPosition = null;
/**
* The ImageDataDescriptor for the object environment group
*/
private ImageDataDescriptor _imageDataDescriptor = null;
/**
* Default constructor for the ObjectEnvironmentGroup.
*/
public ObjectEnvironmentGroup() {
this(DEFAULT_NAME);
}
/**
* Constructor for the ObjectEnvironmentGroup, this takes a
* name parameter which must be 8 characters long.
* @param name the object environment group name
*/
public ObjectEnvironmentGroup(String name) {
super(name);
}
/**
* Sets the object area parameters.
* @param x the x position of the object
* @param y the y position of the object
* @param width the object width
* @param height the object height
* @param rotation the object orientation
*/
public void setObjectArea(int x, int y, int width, int height, int rotation) {
_objectAreaDescriptor = new ObjectAreaDescriptor(width, height);
_objectAreaPosition = new ObjectAreaPosition(x, y, rotation);
}
/**
* Set the dimensions of the image.
* @param xresol the x resolution of the image
* @param yresol the y resolution of the image
* @param width the image width
* @param height the image height
*/
public void setImageData(int xresol, int yresol, int width, int height) {
_imageDataDescriptor = new ImageDataDescriptor(xresol, yresol, width, height);
}
/**
* Accessor method to obtain write the AFP datastream for
* the object environment group.
* @param os The stream to write to
* @throws java.io.IOException
*/
public void writeDataStream(OutputStream os)
throws IOException {
writeStart(os);
_objectAreaDescriptor.writeDataStream(os);
_objectAreaPosition.writeDataStream(os);
if (_imageDataDescriptor != null) {
_imageDataDescriptor.writeDataStream(os);
}
writeEnd(os);
}
/**
* Helper method to write the start of the object environment group.
* @param os The stream to write to
*/
private void writeStart(OutputStream os)
throws IOException {
byte[] data = new byte[] {
0x5A, // Structured field identifier
0x00, // Length byte 1
0x10, // Length byte 2
(byte) 0xD3, // Structured field id byte 1
(byte) 0xA8, // Structured field id byte 2
(byte) 0xC7, // Structured field id byte 3
0x00, // Flags
0x00, // Reserved
0x00, // Reserved
0x00, // Name
0x00, //
0x00, //
0x00, //
0x00, //
0x00, //
0x00, //
0x00, //
};
for (int i = 0; i < _nameBytes.length; i++) {
data[9 + i] = _nameBytes[i];
}
os.write(data);
}
/**
* Helper method to write the end of the object environment group.
* @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) 0xC7; // 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);
}
}
|
