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1
51 package org.apache.fop.pdf;
52
53 import java.io.UnsupportedEncodingException  ;
55 import java.util.ArrayList ;
56
57
58
66
67 public class PDFOutline extends PDFObject {
68
69
72 private ArrayList _subentries;
73
74
77 private PDFOutline _parent;
78
79 private PDFOutline _prev;
80 private PDFOutline _next;
81
82 private PDFOutline _first;
83 private PDFOutline _last;
84
85 private int _count;
86
87
88
91 private String _title;
92
93 String _actionRef;
94
95
96
97
102 public PDFOutline(int number, String title, String action) {
103 super(number);
104 _subentries = new ArrayList ();
105 _count = 0;
106 _parent = null;
107 _prev = null;
108 _next = null;
109 _first = null;
110 _last = null;
111 _title = title;
112 _actionRef = action;
113
114
115 }
116
117 public void setTitle(String title) {
118 _title = title;
119 }
120
121
124 public void addOutline(PDFOutline outline) {
125 if (_subentries.size() > 0) {
126 outline._prev =
127 (PDFOutline)_subentries.get(_subentries.size() - 1);
128 outline._prev._next = outline;
129 } else {
130 _first = outline;
131 }
132
133 _subentries.add(outline);
134 outline._parent = this;
135
136 incrementCount();
138 _last = outline;
139
140 }
141
142 private void incrementCount() {
143 _count++;
145 if (_parent != null) {
146 _parent.incrementCount();
147 }
148 }
149
150
151
154 protected byte[] toPDF() {
155 StringBuffer result = new StringBuffer (this.number + " "
156 + this.generation
157 + " obj\n<<\n");
158 if (_parent == null) {
159 if (_first != null && _last != null) {
161 result.append(" /First " + _first.referencePDF() + "\n");
162 result.append(" /Last " + _last.referencePDF() + "\n");
163 }
165 } else {
166 result.append(" /Title (" + escapeString(_title) + ")\n");
168 result.append(" /Parent " + _parent.referencePDF() + "\n");
169 if (_first != null && _last != null) {
170 result.append(" /First " + _first.referencePDF() + "\n");
171 result.append(" /Last " + _last.referencePDF() + "\n");
172 }
173 if (_prev != null) {
174 result.append(" /Prev " + _prev.referencePDF() + "\n");
175 }
176 if (_next != null) {
177 result.append(" /Next " + _next.referencePDF() + "\n");
178 }
179 if (_count > 0) {
180 result.append(" /Count -" + _count + "\n");
181 }
182
183 if (_actionRef != null) {
184 result.append(" /A " + _actionRef + "\n");
185 }
186
187
188 }
189 result.append(">> endobj\n");
190
191 try {
192 return result.toString().getBytes(PDFDocument.ENCODING);
193 } catch (UnsupportedEncodingException ue) {
194 return result.toString().getBytes();
195 }
196 }
197
198
201 private String escapeString(String s) {
202 StringBuffer result = new StringBuffer ();
203 if (s != null) {
204 int l = s.length();
205
206 result.append("\\376\\377");
208
209 for (int i = 0; i < l; i++) {
210 char ch = s.charAt(i);
211 int high = (ch & 0xff00) >>> 8;
212 int low = ch & 0xff;
213 result.append("\\");
214 result.append(Integer.toOctalString(high));
215 result.append("\\");
216 result.append(Integer.toOctalString(low));
217 }
218 }
219
220 return result.toString();
221 }
222
223 }
224 |
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