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1
28 package net.sf.jasperreports.engine.util;
29
30 import java.text.BreakIterator  ;
31 import java.text.CharacterIterator ;
32 import java.text.StringCharacterIterator ;
33
34 import net.sf.jasperreports.engine.JRRuntimeException;
35
36 import com.lowagie.text.SplitCharacter;
37 import com.lowagie.text.pdf.PdfChunk;
38
39
40
50 public class BreakIteratorSplitCharacter implements SplitCharacter
51 {
52
53 private char[] chars;
54 private int start, end;
55 private boolean[] boundary;
56 private int lastBoundary;
57 private final BreakIterator breakIter;
58
59 public BreakIteratorSplitCharacter()
60 {
61 this(BreakIterator.getLineInstance());
62 }
63
64 public BreakIteratorSplitCharacter(BreakIterator breakIter)
65 {
66 this.breakIter = breakIter;
67 }
68
69 public boolean isSplitCharacter(int startIdx, int current, int endIdx, char[] cc, PdfChunk[] ck)
70 {
71 ++current;
72 if (current == endIdx)
73 {
74 return true;
75 }
76
77 if (!(chars == cc && this.start == startIdx && this.end == endIdx))
78 {
79 chars = cc;
80 this.start = startIdx;
81 this.end = endIdx;
82
83 breakIter.setText(new ArrayCharIterator(cc, startIdx, endIdx));
84
85 boundary = new boolean[endIdx - startIdx + 1];
86
87 lastBoundary = breakIter.first();
88 if (lastBoundary != BreakIterator.DONE)
89 {
90 boundary[lastBoundary - startIdx] = true;
91 }
92 }
93
94 while (current > lastBoundary)
95 {
96 lastBoundary = breakIter.next();
97
98 if (lastBoundary == BreakIterator.DONE)
99 {
100 lastBoundary = Integer.MAX_VALUE;
101 }
102 else
103 {
104 boundary[lastBoundary - startIdx] = true;
105 }
106 }
107
108 return boundary[current - startIdx];
109 }
110
111 protected static class ArrayCharIterator implements CharacterIterator
112 {
113
114 private char[] chars;
115 private int start;
116 private int end;
117 private int curr;
118
119 public ArrayCharIterator(char[] chars, int start, int end)
120 {
121 this.chars = chars;
122 this.start = start;
123 this.end = end;
124 }
125
126 public char first()
127 {
128 curr = start;
129 return current();
130 }
131
132 public char last()
133 {
134 if (end == start)
135 {
136 curr = end;
137 }
138 else
139 {
140 curr = end - 1;
141 }
142 return current();
143 }
144
145 public char setIndex(int position)
146 {
147 if (position < start || position > end)
148 {
149 throw new JRRuntimeException("Invalid index " + position + " (start = " + start + ", end = " + end + ")");
150 }
151 curr = position;
152 return current();
153 }
154
155 public char current()
156 {
157 if (curr < start || curr >= end)
158 {
159 return DONE;
160 }
161 return chars[curr];
162 }
163
164 public char next()
165 {
166 if (curr >= end - 1)
167 {
168 curr = end;
169 return DONE;
170 }
171 curr++;
172 return chars[curr];
173 }
174
175 public char previous()
176 {
177 if (curr <= start)
178 {
179 return DONE;
180 }
181 curr--;
182 return chars[curr];
183 }
184
185 public int getBeginIndex()
186 {
187 return start;
188 }
189
190 public int getEndIndex()
191 {
192 return end;
193 }
194
195 public int getIndex()
196 {
197 return curr;
198 }
199
200 public Object clone()
201 {
202 try
203 {
204 StringCharacterIterator other = (StringCharacterIterator ) super.clone();
205 return other;
206 }
207 catch (CloneNotSupportedException e)
208 {
209 throw new InternalError ();
210 }
211 }
212 }
213
214 }
215 |
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