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1
16
17 package swingwtx.swing.text;
18
19 import java.text.CharacterIterator  ;
20
21 public class Segment implements Cloneable , CharacterIterator {
22
23 public char[] array;
24 public int offset;
25 public int count;
26
27 private boolean partialReturn;
28
29 public Segment() {
30 this(null, 0, 0);
31 }
32 public Segment(char[] array, int offset, int count) {
33 this.array = array;
34 this.offset = offset;
35 this.count = count;
36 partialReturn = false;
37 }
38 public void setPartialReturn(boolean p) {
39 partialReturn = p;
40 }
41 public boolean isPartialReturn() {
42 return partialReturn;
43 }
44 public String toString() {
45 if (array != null) {
46 return new String (array, offset, count);
47 }
48 return new String ();
49 }
50
51 public char first() {
52 pos = offset;
53 if (count != 0) {
54 return array[pos];
55 }
56 return DONE;
57 }
58 public char last() {
59 pos = offset + count;
60 if (count != 0) {
61 pos -= 1;
62 return array[pos];
63 }
64 return DONE;
65 }
66 public char current() {
67 if (count != 0 && pos < offset + count) {
68 return array[pos];
69 }
70 return DONE;
71 }
72 public char next() {
73 pos += 1;
74 int end = offset + count;
75 if (pos >= end) {
76 pos = end;
77 return DONE;
78 }
79 return current();
80 }
81 public char previous() {
82 if (pos == offset) {
83 return DONE;
84 }
85 pos -= 1;
86 return current();
87 }
88 public char setIndex(int position) {
89 int end = offset + count;
90 if ((position < offset) || (position > end)) {
91 throw new IllegalArgumentException ("bad position: " + position);
92 }
93 pos = position;
94 if ((pos != end) && (count != 0)) {
95 return array[pos];
96 }
97 return DONE;
98 }
99 public int getBeginIndex() {
100 return offset;
101 }
102 public int getEndIndex() {
103 return offset + count;
104 }
105 public int getIndex() {
106 return pos;
107 }
108 public Object clone() {
109 Object o;
110 try {
111 o = super.clone();
112 } catch (CloneNotSupportedException cnse) {
113 o = null;
114 }
115 return o;
116 }
117
118 private int pos;
119 } |
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