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
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
|
/*
* Copyright (C) 2006 The Android Open Source Project
*
* Licensed 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.
*/
package android.text;
import android.content.res.Resources;
import android.os.Parcel;
import android.os.Parcelable;
import android.os.SystemProperties;
import android.provider.Settings;
import android.text.style.AbsoluteSizeSpan;
import android.text.style.AlignmentSpan;
import android.text.style.BackgroundColorSpan;
import android.text.style.BulletSpan;
import android.text.style.CharacterStyle;
import android.text.style.EasyEditSpan;
import android.text.style.ForegroundColorSpan;
import android.text.style.LeadingMarginSpan;
import android.text.style.LocaleSpan;
import android.text.style.MetricAffectingSpan;
import android.text.style.QuoteSpan;
import android.text.style.RelativeSizeSpan;
import android.text.style.ReplacementSpan;
import android.text.style.ScaleXSpan;
import android.text.style.SpellCheckSpan;
import android.text.style.StrikethroughSpan;
import android.text.style.StyleSpan;
import android.text.style.SubscriptSpan;
import android.text.style.SuggestionRangeSpan;
import android.text.style.SuggestionSpan;
import android.text.style.SuperscriptSpan;
import android.text.style.TextAppearanceSpan;
import android.text.style.TtsSpan;
import android.text.style.TypefaceSpan;
import android.text.style.URLSpan;
import android.text.style.UnderlineSpan;
import android.util.Log;
import android.util.Printer;
import android.view.View;
import com.android.internal.R;
import com.android.internal.util.ArrayUtils;
import libcore.icu.ICU;
import java.lang.reflect.Array;
import java.util.Iterator;
import java.util.Locale;
import java.util.regex.Pattern;
public class TextUtils {
private static final String TAG = "TextUtils";
/* package */ static final char[] ELLIPSIS_NORMAL = { '\u2026' }; // this is "..."
private static final String ELLIPSIS_STRING = new String(ELLIPSIS_NORMAL);
/* package */ static final char[] ELLIPSIS_TWO_DOTS = { '\u2025' }; // this is ".."
private static final String ELLIPSIS_TWO_DOTS_STRING = new String(ELLIPSIS_TWO_DOTS);
private TextUtils() { /* cannot be instantiated */ }
public static void getChars(CharSequence s, int start, int end,
char[] dest, int destoff) {
Class<? extends CharSequence> c = s.getClass();
if (c == String.class)
((String) s).getChars(start, end, dest, destoff);
else if (c == StringBuffer.class)
((StringBuffer) s).getChars(start, end, dest, destoff);
else if (c == StringBuilder.class)
((StringBuilder) s).getChars(start, end, dest, destoff);
else if (s instanceof GetChars)
((GetChars) s).getChars(start, end, dest, destoff);
else {
for (int i = start; i < end; i++)
dest[destoff++] = s.charAt(i);
}
}
public static int indexOf(CharSequence s, char ch) {
return indexOf(s, ch, 0);
}
public static int indexOf(CharSequence s, char ch, int start) {
Class<? extends CharSequence> c = s.getClass();
if (c == String.class)
return ((String) s).indexOf(ch, start);
return indexOf(s, ch, start, s.length());
}
public static int indexOf(CharSequence s, char ch, int start, int end) {
Class<? extends CharSequence> c = s.getClass();
if (s instanceof GetChars || c == StringBuffer.class ||
c == StringBuilder.class || c == String.class) {
final int INDEX_INCREMENT = 500;
char[] temp = obtain(INDEX_INCREMENT);
while (start < end) {
int segend = start + INDEX_INCREMENT;
if (segend > end)
segend = end;
getChars(s, start, segend, temp, 0);
int count = segend - start;
for (int i = 0; i < count; i++) {
if (temp[i] == ch) {
recycle(temp);
return i + start;
}
}
start = segend;
}
recycle(temp);
return -1;
}
for (int i = start; i < end; i++)
if (s.charAt(i) == ch)
return i;
return -1;
}
public static int lastIndexOf(CharSequence s, char ch) {
return lastIndexOf(s, ch, s.length() - 1);
}
public static int lastIndexOf(CharSequence s, char ch, int last) {
Class<? extends CharSequence> c = s.getClass();
if (c == String.class)
return ((String) s).lastIndexOf(ch, last);
return lastIndexOf(s, ch, 0, last);
}
public static int lastIndexOf(CharSequence s, char ch,
int start, int last) {
if (last < 0)
return -1;
if (last >= s.length())
last = s.length() - 1;
int end = last + 1;
Class<? extends CharSequence> c = s.getClass();
if (s instanceof GetChars || c == StringBuffer.class ||
c == StringBuilder.class || c == String.class) {
final int INDEX_INCREMENT = 500;
char[] temp = obtain(INDEX_INCREMENT);
while (start < end) {
int segstart = end - INDEX_INCREMENT;
if (segstart < start)
segstart = start;
getChars(s, segstart, end, temp, 0);
int count = end - segstart;
for (int i = count - 1; i >= 0; i--) {
if (temp[i] == ch) {
recycle(temp);
return i + segstart;
}
}
end = segstart;
}
recycle(temp);
return -1;
}
for (int i = end - 1; i >= start; i--)
if (s.charAt(i) == ch)
return i;
return -1;
}
public static int indexOf(CharSequence s, CharSequence needle) {
return indexOf(s, needle, 0, s.length());
}
public static int indexOf(CharSequence s, CharSequence needle, int start) {
return indexOf(s, needle, start, s.length());
}
public static int indexOf(CharSequence s, CharSequence needle,
int start, int end) {
int nlen = needle.length();
if (nlen == 0)
return start;
char c = needle.charAt(0);
for (;;) {
start = indexOf(s, c, start);
if (start > end - nlen) {
break;
}
if (start < 0) {
return -1;
}
if (regionMatches(s, start, needle, 0, nlen)) {
return start;
}
start++;
}
return -1;
}
public static boolean regionMatches(CharSequence one, int toffset,
CharSequence two, int ooffset,
int len) {
int tempLen = 2 * len;
if (tempLen < len) {
// Integer overflow; len is unreasonably large
throw new IndexOutOfBoundsException();
}
char[] temp = obtain(tempLen);
getChars(one, toffset, toffset + len, temp, 0);
getChars(two, ooffset, ooffset + len, temp, len);
boolean match = true;
for (int i = 0; i < len; i++) {
if (temp[i] != temp[i + len]) {
match = false;
break;
}
}
recycle(temp);
return match;
}
/**
* Create a new String object containing the given range of characters
* from the source string. This is different than simply calling
* {@link CharSequence#subSequence(int, int) CharSequence.subSequence}
* in that it does not preserve any style runs in the source sequence,
* allowing a more efficient implementation.
*/
public static String substring(CharSequence source, int start, int end) {
if (source instanceof String)
return ((String) source).substring(start, end);
if (source instanceof StringBuilder)
return ((StringBuilder) source).substring(start, end);
if (source instanceof StringBuffer)
return ((StringBuffer) source).substring(start, end);
char[] temp = obtain(end - start);
getChars(source, start, end, temp, 0);
String ret = new String(temp, 0, end - start);
recycle(temp);
return ret;
}
/**
* Returns list of multiple {@link CharSequence} joined into a single
* {@link CharSequence} separated by localized delimiter such as ", ".
*
* @hide
*/
public static CharSequence join(Iterable<CharSequence> list) {
final CharSequence delimiter = Resources.getSystem().getText(R.string.list_delimeter);
return join(delimiter, list);
}
/**
* Returns a string containing the tokens joined by delimiters.
* @param tokens an array objects to be joined. Strings will be formed from
* the objects by calling object.toString().
*/
public static String join(CharSequence delimiter, Object[] tokens) {
StringBuilder sb = new StringBuilder();
boolean firstTime = true;
for (Object token: tokens) {
if (firstTime) {
firstTime = false;
} else {
sb.append(delimiter);
}
sb.append(token);
}
return sb.toString();
}
/**
* Returns a string containing the tokens joined by delimiters.
* @param tokens an array objects to be joined. Strings will be formed from
* the objects by calling object.toString().
*/
public static String join(CharSequence delimiter, Iterable tokens) {
StringBuilder sb = new StringBuilder();
boolean firstTime = true;
for (Object token: tokens) {
if (firstTime) {
firstTime = false;
} else {
sb.append(delimiter);
}
sb.append(token);
}
return sb.toString();
}
/**
* String.split() returns [''] when the string to be split is empty. This returns []. This does
* not remove any empty strings from the result. For example split("a,", "," ) returns {"a", ""}.
*
* @param text the string to split
* @param expression the regular expression to match
* @return an array of strings. The array will be empty if text is empty
*
* @throws NullPointerException if expression or text is null
*/
public static String[] split(String text, String expression) {
if (text.length() == 0) {
return EMPTY_STRING_ARRAY;
} else {
return text.split(expression, -1);
}
}
/**
* Splits a string on a pattern. String.split() returns [''] when the string to be
* split is empty. This returns []. This does not remove any empty strings from the result.
* @param text the string to split
* @param pattern the regular expression to match
* @return an array of strings. The array will be empty if text is empty
*
* @throws NullPointerException if expression or text is null
*/
public static String[] split(String text, Pattern pattern) {
if (text.length() == 0) {
return EMPTY_STRING_ARRAY;
} else {
return pattern.split(text, -1);
}
}
/**
* An interface for splitting strings according to rules that are opaque to the user of this
* interface. This also has less overhead than split, which uses regular expressions and
* allocates an array to hold the results.
*
* <p>The most efficient way to use this class is:
*
* <pre>
* // Once
* TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(delimiter);
*
* // Once per string to split
* splitter.setString(string);
* for (String s : splitter) {
* ...
* }
* </pre>
*/
public interface StringSplitter extends Iterable<String> {
public void setString(String string);
}
/**
* A simple string splitter.
*
* <p>If the final character in the string to split is the delimiter then no empty string will
* be returned for the empty string after that delimeter. That is, splitting <tt>"a,b,"</tt> on
* comma will return <tt>"a", "b"</tt>, not <tt>"a", "b", ""</tt>.
*/
public static class SimpleStringSplitter implements StringSplitter, Iterator<String> {
private String mString;
private char mDelimiter;
private int mPosition;
private int mLength;
/**
* Initializes the splitter. setString may be called later.
* @param delimiter the delimeter on which to split
*/
public SimpleStringSplitter(char delimiter) {
mDelimiter = delimiter;
}
/**
* Sets the string to split
* @param string the string to split
*/
public void setString(String string) {
mString = string;
mPosition = 0;
mLength = mString.length();
}
public Iterator<String> iterator() {
return this;
}
public boolean hasNext() {
return mPosition < mLength;
}
public String next() {
int end = mString.indexOf(mDelimiter, mPosition);
if (end == -1) {
end = mLength;
}
String nextString = mString.substring(mPosition, end);
mPosition = end + 1; // Skip the delimiter.
return nextString;
}
public void remove() {
throw new UnsupportedOperationException();
}
}
public static CharSequence stringOrSpannedString(CharSequence source) {
if (source == null)
return null;
if (source instanceof SpannedString)
return source;
if (source instanceof Spanned)
return new SpannedString(source);
return source.toString();
}
/**
* Returns true if the string is null or 0-length.
* @param str the string to be examined
* @return true if str is null or zero length
*/
public static boolean isEmpty(CharSequence str) {
if (str == null || str.length() == 0)
return true;
else
return false;
}
/**
* Returns the length that the specified CharSequence would have if
* spaces and control characters were trimmed from the start and end,
* as by {@link String#trim}.
*/
public static int getTrimmedLength(CharSequence s) {
int len = s.length();
int start = 0;
while (start < len && s.charAt(start) <= ' ') {
start++;
}
int end = len;
while (end > start && s.charAt(end - 1) <= ' ') {
end--;
}
return end - start;
}
/**
* Returns true if a and b are equal, including if they are both null.
* <p><i>Note: In platform versions 1.1 and earlier, this method only worked well if
* both the arguments were instances of String.</i></p>
* @param a first CharSequence to check
* @param b second CharSequence to check
* @return true if a and b are equal
*/
public static boolean equals(CharSequence a, CharSequence b) {
if (a == b) return true;
int length;
if (a != null && b != null && (length = a.length()) == b.length()) {
if (a instanceof String && b instanceof String) {
return a.equals(b);
} else {
for (int i = 0; i < length; i++) {
if (a.charAt(i) != b.charAt(i)) return false;
}
return true;
}
}
return false;
}
// XXX currently this only reverses chars, not spans
public static CharSequence getReverse(CharSequence source,
int start, int end) {
return new Reverser(source, start, end);
}
private static class Reverser
implements CharSequence, GetChars
{
public Reverser(CharSequence source, int start, int end) {
mSource = source;
mStart = start;
mEnd = end;
}
public int length() {
return mEnd - mStart;
}
public CharSequence subSequence(int start, int end) {
char[] buf = new char[end - start];
getChars(start, end, buf, 0);
return new String(buf);
}
@Override
public String toString() {
return subSequence(0, length()).toString();
}
public char charAt(int off) {
return AndroidCharacter.getMirror(mSource.charAt(mEnd - 1 - off));
}
public void getChars(int start, int end, char[] dest, int destoff) {
TextUtils.getChars(mSource, start + mStart, end + mStart,
dest, destoff);
AndroidCharacter.mirror(dest, 0, end - start);
int len = end - start;
int n = (end - start) / 2;
for (int i = 0; i < n; i++) {
char tmp = dest[destoff + i];
dest[destoff + i] = dest[destoff + len - i - 1];
dest[destoff + len - i - 1] = tmp;
}
}
private CharSequence mSource;
private int mStart;
private int mEnd;
}
/** @hide */
public static final int ALIGNMENT_SPAN = 1;
/** @hide */
public static final int FIRST_SPAN = ALIGNMENT_SPAN;
/** @hide */
public static final int FOREGROUND_COLOR_SPAN = 2;
/** @hide */
public static final int RELATIVE_SIZE_SPAN = 3;
/** @hide */
public static final int SCALE_X_SPAN = 4;
/** @hide */
public static final int STRIKETHROUGH_SPAN = 5;
/** @hide */
public static final int UNDERLINE_SPAN = 6;
/** @hide */
public static final int STYLE_SPAN = 7;
/** @hide */
public static final int BULLET_SPAN = 8;
/** @hide */
public static final int QUOTE_SPAN = 9;
/** @hide */
public static final int LEADING_MARGIN_SPAN = 10;
/** @hide */
public static final int URL_SPAN = 11;
/** @hide */
public static final int BACKGROUND_COLOR_SPAN = 12;
/** @hide */
public static final int TYPEFACE_SPAN = 13;
/** @hide */
public static final int SUPERSCRIPT_SPAN = 14;
/** @hide */
public static final int SUBSCRIPT_SPAN = 15;
/** @hide */
public static final int ABSOLUTE_SIZE_SPAN = 16;
/** @hide */
public static final int TEXT_APPEARANCE_SPAN = 17;
/** @hide */
public static final int ANNOTATION = 18;
/** @hide */
public static final int SUGGESTION_SPAN = 19;
/** @hide */
public static final int SPELL_CHECK_SPAN = 20;
/** @hide */
public static final int SUGGESTION_RANGE_SPAN = 21;
/** @hide */
public static final int EASY_EDIT_SPAN = 22;
/** @hide */
public static final int LOCALE_SPAN = 23;
/** @hide */
public static final int TTS_SPAN = 24;
/** @hide */
public static final int LAST_SPAN = TTS_SPAN;
/**
* Flatten a CharSequence and whatever styles can be copied across processes
* into the parcel.
*/
public static void writeToParcel(CharSequence cs, Parcel p,
int parcelableFlags) {
if (cs instanceof Spanned) {
p.writeInt(0);
p.writeString(cs.toString());
Spanned sp = (Spanned) cs;
Object[] os = sp.getSpans(0, cs.length(), Object.class);
// note to people adding to this: check more specific types
// before more generic types. also notice that it uses
// "if" instead of "else if" where there are interfaces
// so one object can be several.
for (int i = 0; i < os.length; i++) {
Object o = os[i];
Object prop = os[i];
if (prop instanceof CharacterStyle) {
prop = ((CharacterStyle) prop).getUnderlying();
}
if (prop instanceof ParcelableSpan) {
ParcelableSpan ps = (ParcelableSpan)prop;
int spanTypeId = ps.getSpanTypeId();
if (spanTypeId < FIRST_SPAN || spanTypeId > LAST_SPAN) {
Log.e(TAG, "external class \"" + ps.getClass().getSimpleName()
+ "\" is attempting to use the frameworks-only ParcelableSpan"
+ " interface");
} else {
p.writeInt(spanTypeId);
ps.writeToParcel(p, parcelableFlags);
writeWhere(p, sp, o);
}
}
}
p.writeInt(0);
} else {
p.writeInt(1);
if (cs != null) {
p.writeString(cs.toString());
} else {
p.writeString(null);
}
}
}
private static void writeWhere(Parcel p, Spanned sp, Object o) {
p.writeInt(sp.getSpanStart(o));
p.writeInt(sp.getSpanEnd(o));
p.writeInt(sp.getSpanFlags(o));
}
public static final Parcelable.Creator<CharSequence> CHAR_SEQUENCE_CREATOR
= new Parcelable.Creator<CharSequence>() {
/**
* Read and return a new CharSequence, possibly with styles,
* from the parcel.
*/
public CharSequence createFromParcel(Parcel p) {
int kind = p.readInt();
String string = p.readString();
if (string == null) {
return null;
}
if (kind == 1) {
return string;
}
SpannableString sp = new SpannableString(string);
while (true) {
kind = p.readInt();
if (kind == 0)
break;
switch (kind) {
case ALIGNMENT_SPAN:
readSpan(p, sp, new AlignmentSpan.Standard(p));
break;
case FOREGROUND_COLOR_SPAN:
readSpan(p, sp, new ForegroundColorSpan(p));
break;
case RELATIVE_SIZE_SPAN:
readSpan(p, sp, new RelativeSizeSpan(p));
break;
case SCALE_X_SPAN:
readSpan(p, sp, new ScaleXSpan(p));
break;
case STRIKETHROUGH_SPAN:
readSpan(p, sp, new StrikethroughSpan(p));
break;
case UNDERLINE_SPAN:
readSpan(p, sp, new UnderlineSpan(p));
break;
case STYLE_SPAN:
readSpan(p, sp, new StyleSpan(p));
break;
case BULLET_SPAN:
readSpan(p, sp, new BulletSpan(p));
break;
case QUOTE_SPAN:
readSpan(p, sp, new QuoteSpan(p));
break;
case LEADING_MARGIN_SPAN:
readSpan(p, sp, new LeadingMarginSpan.Standard(p));
break;
case URL_SPAN:
readSpan(p, sp, new URLSpan(p));
break;
case BACKGROUND_COLOR_SPAN:
readSpan(p, sp, new BackgroundColorSpan(p));
break;
case TYPEFACE_SPAN:
readSpan(p, sp, new TypefaceSpan(p));
break;
case SUPERSCRIPT_SPAN:
readSpan(p, sp, new SuperscriptSpan(p));
break;
case SUBSCRIPT_SPAN:
readSpan(p, sp, new SubscriptSpan(p));
break;
case ABSOLUTE_SIZE_SPAN:
readSpan(p, sp, new AbsoluteSizeSpan(p));
break;
case TEXT_APPEARANCE_SPAN:
readSpan(p, sp, new TextAppearanceSpan(p));
break;
case ANNOTATION:
readSpan(p, sp, new Annotation(p));
break;
case SUGGESTION_SPAN:
readSpan(p, sp, new SuggestionSpan(p));
break;
case SPELL_CHECK_SPAN:
readSpan(p, sp, new SpellCheckSpan(p));
break;
case SUGGESTION_RANGE_SPAN:
readSpan(p, sp, new SuggestionRangeSpan(p));
break;
case EASY_EDIT_SPAN:
readSpan(p, sp, new EasyEditSpan(p));
break;
case LOCALE_SPAN:
readSpan(p, sp, new LocaleSpan(p));
break;
case TTS_SPAN:
readSpan(p, sp, new TtsSpan(p));
break;
default:
throw new RuntimeException("bogus span encoding " + kind);
}
}
return sp;
}
public CharSequence[] newArray(int size)
{
return new CharSequence[size];
}
};
/**
* Debugging tool to print the spans in a CharSequence. The output will
* be printed one span per line. If the CharSequence is not a Spanned,
* then the entire string will be printed on a single line.
*/
public static void dumpSpans(CharSequence cs, Printer printer, String prefix) {
if (cs instanceof Spanned) {
Spanned sp = (Spanned) cs;
Object[] os = sp.getSpans(0, cs.length(), Object.class);
for (int i = 0; i < os.length; i++) {
Object o = os[i];
printer.println(prefix + cs.subSequence(sp.getSpanStart(o),
sp.getSpanEnd(o)) + ": "
+ Integer.toHexString(System.identityHashCode(o))
+ " " + o.getClass().getCanonicalName()
+ " (" + sp.getSpanStart(o) + "-" + sp.getSpanEnd(o)
+ ") fl=#" + sp.getSpanFlags(o));
}
} else {
printer.println(prefix + cs + ": (no spans)");
}
}
/**
* Return a new CharSequence in which each of the source strings is
* replaced by the corresponding element of the destinations.
*/
public static CharSequence replace(CharSequence template,
String[] sources,
CharSequence[] destinations) {
SpannableStringBuilder tb = new SpannableStringBuilder(template);
for (int i = 0; i < sources.length; i++) {
int where = indexOf(tb, sources[i]);
if (where >= 0)
tb.setSpan(sources[i], where, where + sources[i].length(),
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
for (int i = 0; i < sources.length; i++) {
int start = tb.getSpanStart(sources[i]);
int end = tb.getSpanEnd(sources[i]);
if (start >= 0) {
tb.replace(start, end, destinations[i]);
}
}
return tb;
}
/**
* Replace instances of "^1", "^2", etc. in the
* <code>template</code> CharSequence with the corresponding
* <code>values</code>. "^^" is used to produce a single caret in
* the output. Only up to 9 replacement values are supported,
* "^10" will be produce the first replacement value followed by a
* '0'.
*
* @param template the input text containing "^1"-style
* placeholder values. This object is not modified; a copy is
* returned.
*
* @param values CharSequences substituted into the template. The
* first is substituted for "^1", the second for "^2", and so on.
*
* @return the new CharSequence produced by doing the replacement
*
* @throws IllegalArgumentException if the template requests a
* value that was not provided, or if more than 9 values are
* provided.
*/
public static CharSequence expandTemplate(CharSequence template,
CharSequence... values) {
if (values.length > 9) {
throw new IllegalArgumentException("max of 9 values are supported");
}
SpannableStringBuilder ssb = new SpannableStringBuilder(template);
try {
int i = 0;
while (i < ssb.length()) {
if (ssb.charAt(i) == '^') {
char next = ssb.charAt(i+1);
if (next == '^') {
ssb.delete(i+1, i+2);
++i;
continue;
} else if (Character.isDigit(next)) {
int which = Character.getNumericValue(next) - 1;
if (which < 0) {
throw new IllegalArgumentException(
"template requests value ^" + (which+1));
}
if (which >= values.length) {
throw new IllegalArgumentException(
"template requests value ^" + (which+1) +
"; only " + values.length + " provided");
}
ssb.replace(i, i+2, values[which]);
i += values[which].length();
continue;
}
}
++i;
}
} catch (IndexOutOfBoundsException ignore) {
// happens when ^ is the last character in the string.
}
return ssb;
}
public static int getOffsetBefore(CharSequence text, int offset) {
if (offset == 0)
return 0;
if (offset == 1)
return 0;
char c = text.charAt(offset - 1);
if (c >= '\uDC00' && c <= '\uDFFF') {
char c1 = text.charAt(offset - 2);
if (c1 >= '\uD800' && c1 <= '\uDBFF')
offset -= 2;
else
offset -= 1;
} else {
offset -= 1;
}
if (text instanceof Spanned) {
ReplacementSpan[] spans = ((Spanned) text).getSpans(offset, offset,
ReplacementSpan.class);
for (int i = 0; i < spans.length; i++) {
int start = ((Spanned) text).getSpanStart(spans[i]);
int end = ((Spanned) text).getSpanEnd(spans[i]);
if (start < offset && end > offset)
offset = start;
}
}
return offset;
}
public static int getOffsetAfter(CharSequence text, int offset) {
int len = text.length();
if (offset == len)
return len;
if (offset == len - 1)
return len;
char c = text.charAt(offset);
if (c >= '\uD800' && c <= '\uDBFF') {
char c1 = text.charAt(offset + 1);
if (c1 >= '\uDC00' && c1 <= '\uDFFF')
offset += 2;
else
offset += 1;
} else {
offset += 1;
}
if (text instanceof Spanned) {
ReplacementSpan[] spans = ((Spanned) text).getSpans(offset, offset,
ReplacementSpan.class);
for (int i = 0; i < spans.length; i++) {
int start = ((Spanned) text).getSpanStart(spans[i]);
int end = ((Spanned) text).getSpanEnd(spans[i]);
if (start < offset && end > offset)
offset = end;
}
}
return offset;
}
private static void readSpan(Parcel p, Spannable sp, Object o) {
sp.setSpan(o, p.readInt(), p.readInt(), p.readInt());
}
/**
* Copies the spans from the region <code>start...end</code> in
* <code>source</code> to the region
* <code>destoff...destoff+end-start</code> in <code>dest</code>.
* Spans in <code>source</code> that begin before <code>start</code>
* or end after <code>end</code> but overlap this range are trimmed
* as if they began at <code>start</code> or ended at <code>end</code>.
*
* @throws IndexOutOfBoundsException if any of the copied spans
* are out of range in <code>dest</code>.
*/
public static void copySpansFrom(Spanned source, int start, int end,
Class kind,
Spannable dest, int destoff) {
if (kind == null) {
kind = Object.class;
}
Object[] spans = source.getSpans(start, end, kind);
for (int i = 0; i < spans.length; i++) {
int st = source.getSpanStart(spans[i]);
int en = source.getSpanEnd(spans[i]);
int fl = source.getSpanFlags(spans[i]);
if (st < start)
st = start;
if (en > end)
en = end;
dest.setSpan(spans[i], st - start + destoff, en - start + destoff,
fl);
}
}
public enum TruncateAt {
START,
MIDDLE,
END,
MARQUEE,
/**
* @hide
*/
END_SMALL
}
public interface EllipsizeCallback {
/**
* This method is called to report that the specified region of
* text was ellipsized away by a call to {@link #ellipsize}.
*/
public void ellipsized(int start, int end);
}
/**
* Returns the original text if it fits in the specified width
* given the properties of the specified Paint,
* or, if it does not fit, a truncated
* copy with ellipsis character added at the specified edge or center.
*/
public static CharSequence ellipsize(CharSequence text,
TextPaint p,
float avail, TruncateAt where) {
return ellipsize(text, p, avail, where, false, null);
}
/**
* Returns the original text if it fits in the specified width
* given the properties of the specified Paint,
* or, if it does not fit, a copy with ellipsis character added
* at the specified edge or center.
* If <code>preserveLength</code> is specified, the returned copy
* will be padded with zero-width spaces to preserve the original
* length and offsets instead of truncating.
* If <code>callback</code> is non-null, it will be called to
* report the start and end of the ellipsized range. TextDirection
* is determined by the first strong directional character.
*/
public static CharSequence ellipsize(CharSequence text,
TextPaint paint,
float avail, TruncateAt where,
boolean preserveLength,
EllipsizeCallback callback) {
return ellipsize(text, paint, avail, where, preserveLength, callback,
TextDirectionHeuristics.FIRSTSTRONG_LTR,
(where == TruncateAt.END_SMALL) ? ELLIPSIS_TWO_DOTS_STRING : ELLIPSIS_STRING);
}
/**
* Returns the original text if it fits in the specified width
* given the properties of the specified Paint,
* or, if it does not fit, a copy with ellipsis character added
* at the specified edge or center.
* If <code>preserveLength</code> is specified, the returned copy
* will be padded with zero-width spaces to preserve the original
* length and offsets instead of truncating.
* If <code>callback</code> is non-null, it will be called to
* report the start and end of the ellipsized range.
*
* @hide
*/
public static CharSequence ellipsize(CharSequence text,
TextPaint paint,
float avail, TruncateAt where,
boolean preserveLength,
EllipsizeCallback callback,
TextDirectionHeuristic textDir, String ellipsis) {
int len = text.length();
MeasuredText mt = MeasuredText.obtain();
try {
float width = setPara(mt, paint, text, 0, text.length(), textDir);
if (width <= avail) {
if (callback != null) {
callback.ellipsized(0, 0);
}
return text;
}
// XXX assumes ellipsis string does not require shaping and
// is unaffected by style
float ellipsiswid = paint.measureText(ellipsis);
avail -= ellipsiswid;
int left = 0;
int right = len;
if (avail < 0) {
// it all goes
} else if (where == TruncateAt.START) {
right = len - mt.breakText(len, false, avail);
} else if (where == TruncateAt.END || where == TruncateAt.END_SMALL) {
left = mt.breakText(len, true, avail);
} else {
right = len - mt.breakText(len, false, avail / 2);
avail -= mt.measure(right, len);
left = mt.breakText(right, true, avail);
}
if (callback != null) {
callback.ellipsized(left, right);
}
char[] buf = mt.mChars;
Spanned sp = text instanceof Spanned ? (Spanned) text : null;
int remaining = len - (right - left);
if (preserveLength) {
if (remaining > 0) { // else eliminate the ellipsis too
buf[left++] = ellipsis.charAt(0);
}
for (int i = left; i < right; i++) {
buf[i] = ZWNBS_CHAR;
}
String s = new String(buf, 0, len);
if (sp == null) {
return s;
}
SpannableString ss = new SpannableString(s);
copySpansFrom(sp, 0, len, Object.class, ss, 0);
return ss;
}
if (remaining == 0) {
return "";
}
if (sp == null) {
StringBuilder sb = new StringBuilder(remaining + ellipsis.length());
sb.append(buf, 0, left);
sb.append(ellipsis);
sb.append(buf, right, len - right);
return sb.toString();
}
SpannableStringBuilder ssb = new SpannableStringBuilder();
ssb.append(text, 0, left);
ssb.append(ellipsis);
ssb.append(text, right, len);
return ssb;
} finally {
MeasuredText.recycle(mt);
}
}
/**
* Converts a CharSequence of the comma-separated form "Andy, Bob,
* Charles, David" that is too wide to fit into the specified width
* into one like "Andy, Bob, 2 more".
*
* @param text the text to truncate
* @param p the Paint with which to measure the text
* @param avail the horizontal width available for the text
* @param oneMore the string for "1 more" in the current locale
* @param more the string for "%d more" in the current locale
*/
public static CharSequence commaEllipsize(CharSequence text,
TextPaint p, float avail,
String oneMore,
String more) {
return commaEllipsize(text, p, avail, oneMore, more,
TextDirectionHeuristics.FIRSTSTRONG_LTR);
}
/**
* @hide
*/
public static CharSequence commaEllipsize(CharSequence text, TextPaint p,
float avail, String oneMore, String more, TextDirectionHeuristic textDir) {
MeasuredText mt = MeasuredText.obtain();
try {
int len = text.length();
float width = setPara(mt, p, text, 0, len, textDir);
if (width <= avail) {
return text;
}
char[] buf = mt.mChars;
int commaCount = 0;
for (int i = 0; i < len; i++) {
if (buf[i] == ',') {
commaCount++;
}
}
int remaining = commaCount + 1;
int ok = 0;
String okFormat = "";
int w = 0;
int count = 0;
float[] widths = mt.mWidths;
MeasuredText tempMt = MeasuredText.obtain();
for (int i = 0; i < len; i++) {
w += widths[i];
if (buf[i] == ',') {
count++;
String format;
// XXX should not insert spaces, should be part of string
// XXX should use plural rules and not assume English plurals
if (--remaining == 1) {
format = " " + oneMore;
} else {
format = " " + String.format(more, remaining);
}
// XXX this is probably ok, but need to look at it more
tempMt.setPara(format, 0, format.length(), textDir);
float moreWid = tempMt.addStyleRun(p, tempMt.mLen, null);
if (w + moreWid <= avail) {
ok = i + 1;
okFormat = format;
}
}
}
MeasuredText.recycle(tempMt);
SpannableStringBuilder out = new SpannableStringBuilder(okFormat);
out.insert(0, text, 0, ok);
return out;
} finally {
MeasuredText.recycle(mt);
}
}
private static float setPara(MeasuredText mt, TextPaint paint,
CharSequence text, int start, int end, TextDirectionHeuristic textDir) {
mt.setPara(text, start, end, textDir);
float width;
Spanned sp = text instanceof Spanned ? (Spanned) text : null;
int len = end - start;
if (sp == null) {
width = mt.addStyleRun(paint, len, null);
} else {
width = 0;
int spanEnd;
for (int spanStart = 0; spanStart < len; spanStart = spanEnd) {
spanEnd = sp.nextSpanTransition(spanStart, len,
MetricAffectingSpan.class);
MetricAffectingSpan[] spans = sp.getSpans(
spanStart, spanEnd, MetricAffectingSpan.class);
spans = TextUtils.removeEmptySpans(spans, sp, MetricAffectingSpan.class);
width += mt.addStyleRun(paint, spans, spanEnd - spanStart, null);
}
}
return width;
}
private static final char FIRST_RIGHT_TO_LEFT = '\u0590';
/* package */
static boolean doesNotNeedBidi(CharSequence s, int start, int end) {
for (int i = start; i < end; i++) {
if (s.charAt(i) >= FIRST_RIGHT_TO_LEFT) {
return false;
}
}
return true;
}
/* package */
static boolean doesNotNeedBidi(char[] text, int start, int len) {
for (int i = start, e = i + len; i < e; i++) {
if (text[i] >= FIRST_RIGHT_TO_LEFT) {
return false;
}
}
return true;
}
/* package */ static char[] obtain(int len) {
char[] buf;
synchronized (sLock) {
buf = sTemp;
sTemp = null;
}
if (buf == null || buf.length < len)
buf = ArrayUtils.newUnpaddedCharArray(len);
return buf;
}
/* package */ static void recycle(char[] temp) {
if (temp.length > 1000)
return;
synchronized (sLock) {
sTemp = temp;
}
}
/**
* Html-encode the string.
* @param s the string to be encoded
* @return the encoded string
*/
public static String htmlEncode(String s) {
StringBuilder sb = new StringBuilder();
char c;
for (int i = 0; i < s.length(); i++) {
c = s.charAt(i);
switch (c) {
case '<':
sb.append("<"); //$NON-NLS-1$
break;
case '>':
sb.append(">"); //$NON-NLS-1$
break;
case '&':
sb.append("&"); //$NON-NLS-1$
break;
case '\'':
//http://www.w3.org/TR/xhtml1
// The named character reference ' (the apostrophe, U+0027) was introduced in
// XML 1.0 but does not appear in HTML. Authors should therefore use ' instead
// of ' to work as expected in HTML 4 user agents.
sb.append("'"); //$NON-NLS-1$
break;
case '"':
sb.append("""); //$NON-NLS-1$
break;
default:
sb.append(c);
}
}
return sb.toString();
}
/**
* Returns a CharSequence concatenating the specified CharSequences,
* retaining their spans if any.
*/
public static CharSequence concat(CharSequence... text) {
if (text.length == 0) {
return "";
}
if (text.length == 1) {
return text[0];
}
boolean spanned = false;
for (int i = 0; i < text.length; i++) {
if (text[i] instanceof Spanned) {
spanned = true;
break;
}
}
StringBuilder sb = new StringBuilder();
for (int i = 0; i < text.length; i++) {
sb.append(text[i]);
}
if (!spanned) {
return sb.toString();
}
SpannableString ss = new SpannableString(sb);
int off = 0;
for (int i = 0; i < text.length; i++) {
int len = text[i].length();
if (text[i] instanceof Spanned) {
copySpansFrom((Spanned) text[i], 0, len, Object.class, ss, off);
}
off += len;
}
return new SpannedString(ss);
}
/**
* Returns whether the given CharSequence contains any printable characters.
*/
public static boolean isGraphic(CharSequence str) {
final int len = str.length();
for (int i=0; i<len; i++) {
int gc = Character.getType(str.charAt(i));
if (gc != Character.CONTROL
&& gc != Character.FORMAT
&& gc != Character.SURROGATE
&& gc != Character.UNASSIGNED
&& gc != Character.LINE_SEPARATOR
&& gc != Character.PARAGRAPH_SEPARATOR
&& gc != Character.SPACE_SEPARATOR) {
return true;
}
}
return false;
}
/**
* Returns whether this character is a printable character.
*/
public static boolean isGraphic(char c) {
int gc = Character.getType(c);
return gc != Character.CONTROL
&& gc != Character.FORMAT
&& gc != Character.SURROGATE
&& gc != Character.UNASSIGNED
&& gc != Character.LINE_SEPARATOR
&& gc != Character.PARAGRAPH_SEPARATOR
&& gc != Character.SPACE_SEPARATOR;
}
/**
* Returns whether the given CharSequence contains only digits.
*/
public static boolean isDigitsOnly(CharSequence str) {
final int len = str.length();
for (int i = 0; i < len; i++) {
if (!Character.isDigit(str.charAt(i))) {
return false;
}
}
return true;
}
/**
* @hide
*/
public static boolean isPrintableAscii(final char c) {
final int asciiFirst = 0x20;
final int asciiLast = 0x7E; // included
return (asciiFirst <= c && c <= asciiLast) || c == '\r' || c == '\n';
}
/**
* @hide
*/
public static boolean isPrintableAsciiOnly(final CharSequence str) {
final int len = str.length();
for (int i = 0; i < len; i++) {
if (!isPrintableAscii(str.charAt(i))) {
return false;
}
}
return true;
}
/**
* Capitalization mode for {@link #getCapsMode}: capitalize all
* characters. This value is explicitly defined to be the same as
* {@link InputType#TYPE_TEXT_FLAG_CAP_CHARACTERS}.
*/
public static final int CAP_MODE_CHARACTERS
= InputType.TYPE_TEXT_FLAG_CAP_CHARACTERS;
/**
* Capitalization mode for {@link #getCapsMode}: capitalize the first
* character of all words. This value is explicitly defined to be the same as
* {@link InputType#TYPE_TEXT_FLAG_CAP_WORDS}.
*/
public static final int CAP_MODE_WORDS
= InputType.TYPE_TEXT_FLAG_CAP_WORDS;
/**
* Capitalization mode for {@link #getCapsMode}: capitalize the first
* character of each sentence. This value is explicitly defined to be the same as
* {@link InputType#TYPE_TEXT_FLAG_CAP_SENTENCES}.
*/
public static final int CAP_MODE_SENTENCES
= InputType.TYPE_TEXT_FLAG_CAP_SENTENCES;
/**
* Determine what caps mode should be in effect at the current offset in
* the text. Only the mode bits set in <var>reqModes</var> will be
* checked. Note that the caps mode flags here are explicitly defined
* to match those in {@link InputType}.
*
* @param cs The text that should be checked for caps modes.
* @param off Location in the text at which to check.
* @param reqModes The modes to be checked: may be any combination of
* {@link #CAP_MODE_CHARACTERS}, {@link #CAP_MODE_WORDS}, and
* {@link #CAP_MODE_SENTENCES}.
*
* @return Returns the actual capitalization modes that can be in effect
* at the current position, which is any combination of
* {@link #CAP_MODE_CHARACTERS}, {@link #CAP_MODE_WORDS}, and
* {@link #CAP_MODE_SENTENCES}.
*/
public static int getCapsMode(CharSequence cs, int off, int reqModes) {
if (off < 0) {
return 0;
}
int i;
char c;
int mode = 0;
if ((reqModes&CAP_MODE_CHARACTERS) != 0) {
mode |= CAP_MODE_CHARACTERS;
}
if ((reqModes&(CAP_MODE_WORDS|CAP_MODE_SENTENCES)) == 0) {
return mode;
}
// Back over allowed opening punctuation.
for (i = off; i > 0; i--) {
c = cs.charAt(i - 1);
if (c != '"' && c != '\'' &&
Character.getType(c) != Character.START_PUNCTUATION) {
break;
}
}
// Start of paragraph, with optional whitespace.
int j = i;
while (j > 0 && ((c = cs.charAt(j - 1)) == ' ' || c == '\t')) {
j--;
}
if (j == 0 || cs.charAt(j - 1) == '\n') {
return mode | CAP_MODE_WORDS;
}
// Or start of word if we are that style.
if ((reqModes&CAP_MODE_SENTENCES) == 0) {
if (i != j) mode |= CAP_MODE_WORDS;
return mode;
}
// There must be a space if not the start of paragraph.
if (i == j) {
return mode;
}
// Back over allowed closing punctuation.
for (; j > 0; j--) {
c = cs.charAt(j - 1);
if (c != '"' && c != '\'' &&
Character.getType(c) != Character.END_PUNCTUATION) {
break;
}
}
if (j > 0) {
c = cs.charAt(j - 1);
if (c == '.' || c == '?' || c == '!') {
// Do not capitalize if the word ends with a period but
// also contains a period, in which case it is an abbreviation.
if (c == '.') {
for (int k = j - 2; k >= 0; k--) {
c = cs.charAt(k);
if (c == '.') {
return mode;
}
if (!Character.isLetter(c)) {
break;
}
}
}
return mode | CAP_MODE_SENTENCES;
}
}
return mode;
}
/**
* Does a comma-delimited list 'delimitedString' contain a certain item?
* (without allocating memory)
*
* @hide
*/
public static boolean delimitedStringContains(
String delimitedString, char delimiter, String item) {
if (isEmpty(delimitedString) || isEmpty(item)) {
return false;
}
int pos = -1;
int length = delimitedString.length();
while ((pos = delimitedString.indexOf(item, pos + 1)) != -1) {
if (pos > 0 && delimitedString.charAt(pos - 1) != delimiter) {
continue;
}
int expectedDelimiterPos = pos + item.length();
if (expectedDelimiterPos == length) {
// Match at end of string.
return true;
}
if (delimitedString.charAt(expectedDelimiterPos) == delimiter) {
return true;
}
}
return false;
}
/**
* Removes empty spans from the <code>spans</code> array.
*
* When parsing a Spanned using {@link Spanned#nextSpanTransition(int, int, Class)}, empty spans
* will (correctly) create span transitions, and calling getSpans on a slice of text bounded by
* one of these transitions will (correctly) include the empty overlapping span.
*
* However, these empty spans should not be taken into account when layouting or rendering the
* string and this method provides a way to filter getSpans' results accordingly.
*
* @param spans A list of spans retrieved using {@link Spanned#getSpans(int, int, Class)} from
* the <code>spanned</code>
* @param spanned The Spanned from which spans were extracted
* @return A subset of spans where empty spans ({@link Spanned#getSpanStart(Object)} ==
* {@link Spanned#getSpanEnd(Object)} have been removed. The initial order is preserved
* @hide
*/
@SuppressWarnings("unchecked")
public static <T> T[] removeEmptySpans(T[] spans, Spanned spanned, Class<T> klass) {
T[] copy = null;
int count = 0;
for (int i = 0; i < spans.length; i++) {
final T span = spans[i];
final int start = spanned.getSpanStart(span);
final int end = spanned.getSpanEnd(span);
if (start == end) {
if (copy == null) {
copy = (T[]) Array.newInstance(klass, spans.length - 1);
System.arraycopy(spans, 0, copy, 0, i);
count = i;
}
} else {
if (copy != null) {
copy[count] = span;
count++;
}
}
}
if (copy != null) {
T[] result = (T[]) Array.newInstance(klass, count);
System.arraycopy(copy, 0, result, 0, count);
return result;
} else {
return spans;
}
}
/**
* Pack 2 int values into a long, useful as a return value for a range
* @see #unpackRangeStartFromLong(long)
* @see #unpackRangeEndFromLong(long)
* @hide
*/
public static long packRangeInLong(int start, int end) {
return (((long) start) << 32) | end;
}
/**
* Get the start value from a range packed in a long by {@link #packRangeInLong(int, int)}
* @see #unpackRangeEndFromLong(long)
* @see #packRangeInLong(int, int)
* @hide
*/
public static int unpackRangeStartFromLong(long range) {
return (int) (range >>> 32);
}
/**
* Get the end value from a range packed in a long by {@link #packRangeInLong(int, int)}
* @see #unpackRangeStartFromLong(long)
* @see #packRangeInLong(int, int)
* @hide
*/
public static int unpackRangeEndFromLong(long range) {
return (int) (range & 0x00000000FFFFFFFFL);
}
/**
* Return the layout direction for a given Locale
*
* @param locale the Locale for which we want the layout direction. Can be null.
* @return the layout direction. This may be one of:
* {@link android.view.View#LAYOUT_DIRECTION_LTR} or
* {@link android.view.View#LAYOUT_DIRECTION_RTL}.
*
* Be careful: this code will need to be updated when vertical scripts will be supported
*/
public static int getLayoutDirectionFromLocale(Locale locale) {
if (locale != null && !locale.equals(Locale.ROOT)) {
final String scriptSubtag = ICU.addLikelySubtags(locale).getScript();
if (scriptSubtag == null) return getLayoutDirectionFromFirstChar(locale);
if (scriptSubtag.equalsIgnoreCase(ARAB_SCRIPT_SUBTAG) ||
scriptSubtag.equalsIgnoreCase(HEBR_SCRIPT_SUBTAG)) {
return View.LAYOUT_DIRECTION_RTL;
}
}
// If forcing into RTL layout mode, return RTL as default, else LTR
return SystemProperties.getBoolean(Settings.Global.DEVELOPMENT_FORCE_RTL, false)
? View.LAYOUT_DIRECTION_RTL
: View.LAYOUT_DIRECTION_LTR;
}
/**
* Fallback algorithm to detect the locale direction. Rely on the fist char of the
* localized locale name. This will not work if the localized locale name is in English
* (this is the case for ICU 4.4 and "Urdu" script)
*
* @param locale
* @return the layout direction. This may be one of:
* {@link View#LAYOUT_DIRECTION_LTR} or
* {@link View#LAYOUT_DIRECTION_RTL}.
*
* Be careful: this code will need to be updated when vertical scripts will be supported
*
* @hide
*/
private static int getLayoutDirectionFromFirstChar(Locale locale) {
switch(Character.getDirectionality(locale.getDisplayName(locale).charAt(0))) {
case Character.DIRECTIONALITY_RIGHT_TO_LEFT:
case Character.DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC:
return View.LAYOUT_DIRECTION_RTL;
case Character.DIRECTIONALITY_LEFT_TO_RIGHT:
default:
return View.LAYOUT_DIRECTION_LTR;
}
}
private static Object sLock = new Object();
private static char[] sTemp = null;
private static String[] EMPTY_STRING_ARRAY = new String[]{};
private static final char ZWNBS_CHAR = '\uFEFF';
private static String ARAB_SCRIPT_SUBTAG = "Arab";
private static String HEBR_SCRIPT_SUBTAG = "Hebr";
}
|