summaryrefslogtreecommitdiffstats
path: root/tdecore/kurl.h
blob: 9cfac28856bc09815d7f20cf049d706adc755969 (plain)
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
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
/* This file is part of the KDE libraries
 *  Copyright (C) 1999 Torben Weis <weis@kde.org>
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Library General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Library General Public License for more details.
 *
 *  You should have received a copy of the GNU Library General Public License
 *  along with this library; see the file COPYING.LIB.  If not, write to
 *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 *  Boston, MA 02110-1301, USA.
 **/

#ifndef __kurl_h__
#define __kurl_h__

#include <tqstring.h>
#include <tqvaluelist.h>
#include "tdelibs_export.h"

class TQUrl;
class TQStringList;
template <typename K, typename V> class TQMap;

class KURLPrivate;

// Defines that file-urls look like file:///path/file instead of file:/path/file
#define KURL_TRIPLE_SLASH_FILE_PROT

/**
 * @brief Represents and parses a URL
 *
 * A prototypical URL looks like:
 * @code
 *   protocol://user:password@hostname:port/path/to/file.ext#reference
 * @endcode
 *
 * KURL handles escaping of URLs. This means that the specification
 * of a full URL will differ from the corresponding string that would specify a
 * local file or directory in file-operations like fopen. This is because an URL
 * doesn't allow certain characters and escapes them.
 *
 * For examle:
 * - '#' -> "%23"
 *  (In a URL the hash-character @c '#' is used to specify a "reference", i.e.
 *  the position within a document)
 * - space -> "%20"
 *
 * The constructor KURL(const TQString&) expects a string properly escaped,
 * or at least non-ambiguous.
 * For instance a local file or directory <tt>"/bar/#foo#"</tt> would have the
 * URL <tt>"file:///bar/%23foo%23"</tt>.
 * If you have the absolute path and need the URL-escaping you should create
 * KURL via the default-constructor and then call setPath(const TQString&):
 * @code
 *     KURL kurl;
 *     kurl.setPath( "/bar/#foo#" );
 *     TQString url = kurl.url();    // -> "file:///bar/%23foo%23"
 * @endcode
 *
 * If you have the URL of a local file or directory and need the absolute path,
 * you would use path().
 * @code
 *    KURL url( "file:///bar/%23foo%23" );
 *    ...
 *    if ( url.isLocalFile() )
 *       TQString path = url.path();       // -> "/bar/#foo#"
 * @endcode
 *
 * The other way round: if the user can enter a string, that can be either a
 * path or a URL, then you need to use KURL::fromPathOrURL() to build a KURL.
 *
 * This must also be considered, when you have separated directory and file
 * strings and need to put them together.
 * While you can simply concatenate normal path strings, you must take care if
 * the directory-part is already an escaped URL.
 * (This might be needed if the user specifies a relative path, and your
 * program supplies the rest from elsewhere.)
 *
 * Wrong:
 * @code
 *    TQString dirUrl = "file:///bar/";
 *    TQString fileName = "#foo#";
 *    TQString invalidURL = dirUrl + fileName;   // -> "file:///bar/#foo#" won't behave like you would expect.
 * @endcode
 * Instead you should use addPath().
 *
 * Right:
 * @code
 *    KURL url( "file:///bar/" );
 *    TQString fileName = "#foo#";
 *    url.addPath( fileName );
 *    TQString validURL = url.url();    // -> "file:///bar/%23foo%23"
 * @endcode
 *
 * Also consider that some URLs contain the password, but this shouldn't be
 * visible. Your program should use prettyURL() every time it displays a
 * URL, whether in the GUI or in debug output or...
 *
 * @code
 *    KURL url( "ftp://name:password@ftp.faraway.org/bar/%23foo%23");
 *    TQString visibleURL = url.prettyURL(); // -> "ftp://name@ftp.faraway.org/bar/%23foo%23"
 * @endcode
 * Note that prettyURL() doesn't change the character escapes (like <tt>"%23"</tt>).
 * Otherwise the URL would be invalid and the user wouldn't be able to use it in another
 * context.
 *
 * KURL has some restrictions regarding the path
 * encoding. KURL works internally with the decoded path and
 * and encoded query. For example,
 * @code
 *    http://localhost/cgi-bin/test%20me.pl?cmd=Hello%20you
 * @endcode
 * would result in a decoded path <tt>"/cgi-bin/test me.pl"</tt>
 * and in the encoded query <tt>"?cmd=Hello%20you"</tt>.
 * Since path is internally always encoded you may @em not use
 * <tt>"%00"</tt> in the path, although this is OK for the query.
 *
 *  @author  Torben Weis <weis@kde.org>
 */
class TDECORE_EXPORT KURL
{
public:
  /**
   * Flags to choose how file: URLs are treated when creating their QString
   * representation with prettyURL(int,AdjustementFlags)
   *
   * However it is recommended to use pathOrURL() instead of this variant of prettyURL()
   */
  enum AdjustementFlags
  {
     /**
     * Do not treat file: URLs differently
     */
    NoAdjustements = 0,
    /**
     * Strip the file: protocol from the string, i.e. return only the path and
     * filename as a local path
     */
    StripFileProtocol = 1
  };

  /**
   * Defines the type of URI we are processing.
   */
  enum URIMode
  {
    /**
     * Automatically detected. Using this mode, an appropriate processing
     * mode will be selected when the URI is first processed.
     */
    Auto,
    /**
     * Invalid URI. This is something that can't be parsed as a URI at all.
     * The contents are accessible through the protocol() method.
     */
    Invalid,
    /**
     * Raw URI. This type of URI should not be processed in any way.
     * Contents are accessible through the path() method.
     */
    RawURI,
    /**
     * Standards compliant URL. Process as a syntactically correct URL.
     */
    URL,
    /**
     * Mailto URI. path() contains an email address which should have its
     * domain part processed as a DNS name. The email address is accessible
     * through the path() method.
     */
    Mailto
  };

  /**
   * KURL::List is a TQValueList that contains KURLs with a few
   * convenience methods.
   * @see KURL
   * @see QValueList
   */
  class TDECORE_EXPORT List : public TQValueList<KURL>
  {
  public:
    /**
     * Creates an empty List.
     */
      List() { }
      /**
       * @brief Creates a list that contains the given URL as only item
       *
       * @param url the URL to add
       */
      List(const KURL &url);
      /**
       * @brief Creates a list that contains the URLs from the given list
       *
       * This equivalent to iterating over the input list and using each item
       * as the argument to KURL's constructor, i.e. the resulting list will
       * have as many elements as the input list, but not all entries might
       * be valid.
       *
       * @param list the list containing the URLs as strings
       *
       * @see KURL(const TQString &, int)
       */
      List(const TQStringList &list);
      /**
       * @brief Converts the URLs of this list to a list of strings
       *
       * This is equivalent to iterating over the list and calling url() on
       * each item.
       * If you need a list of user visible URLs, i.e. not containing password
       * information, iterate over the list yourself and call prettyURL() on
       * each item instead.
       *
       * @return the list of strings
       *
       * @see KURL::url()
       */
      TQStringList toStringList() const;
  };
  /**
   * @brief Constructs an empty URL
   *
   * The created instance will also be invalid, see isValid()
   */
  KURL();

  /**
   * @brief Destructs the KURL object
   */
  ~KURL();

  /**
   * @brief Usual constructor, to construct from a string
   *
   * @warning It is dangerous to feed UNIX filenames into this function,
   * this will work most of the time but not always.
   *
   * For example <tt>"/home/Torben%20Weis"</tt> will be considered a URL
   * pointing to the file <tt>"/home/Torben Weis"</tt> instead
   * of to the file <tt>"/home/Torben%20Weis"</tt>.
   *
   * This means that if you have a usual UNIX like path you should not use
   * this constructor. Instead use fromPathOrURL()
   *
   * @param url a URL, not a filename. If the URL does not have a protocol
   *            part, @c "file:" is assumed
   * @param encoding_hint MIB of original encoding of URL.
   *        See TQTextCodec::mibEnum()
   *
   * @see fromPathOrURL()
   */
  KURL( const TQString& url, int encoding_hint = 0 );
  /**
   * @brief Constructor taking an URL encoded in a C string
   *
   * Constructor taking a char * @p url, which is an @em encoded representation
   * of the URL, exactly like the usual constructor. This is useful when
   * the URL, in its encoded form, is strictly ASCII.
   *
   * @warning It is dangerous to feed UNIX filenames into this function,
   * this will work most of the time but not always.
   *
   * For example <tt>"/home/Torben%20Weis"</tt> will be considered a URL
   * pointing to the file <tt>"/home/Torben Weis"</tt> instead
   * of to the file <tt>"/home/Torben%20Weis"</tt>.
   *
   * This means that if you have a usual UNIX like path you should not use
   * this constructor. Instead use fromPathOrURL()
   *
   * @param url an encoded URL. If the URL does not have a protocol part,
   *            @c "file:" is assumed
   * @param encoding_hint MIB of original encoding of URL.
   *        See TQTextCodec::mibEnum()
   *
   * @see fromPathOrURL()
   * @see TQString::tqfromLatin1()
   */
  KURL( const char * url, int encoding_hint = 0 );
  /**
   * @brief Constructor taking an URL encoded in a QCString
   *
   * Constructor taking a TQCString @p url, which is an @em encoded
   * representation of the URL, exactly like the usual constructor. This is
   * useful when the URL, in its encoded form, is strictly ASCII.
   *
   * @warning It is dangerous to feed UNIX filenames into this function,
   * this will work most of the time but not always.
   *
   * For example <tt>"/home/Torben%20Weis"</tt> will be considered a URL
   * pointing to the file <tt>"/home/Torben Weis"</tt> instead
   * of to the file <tt>"/home/Torben%20Weis"</tt>.
   *
   * This means that if you have a usual UNIX like path you should not use
   * this constructor. Instead use fromPathOrURL()
   *
   * @param url A encoded URL. If the URL does not have a protocol part,
   *            @c "file:" is assumed
   * @param encoding_hint MIB of original encoding of URL.
   *        See TQTextCodec::mibEnum()
   *
   * @see fromPathOrURL()
   * @see TQString::tqfromLatin1()
   */
  KURL( const TQCString& url, int encoding_hint = 0 );

  /**
   * @brief Copy constructor
   *
   * @param u the KURL to copy
   */
  KURL( const KURL& u );
  /**
   * @brief Constructor taking a Qt URL
   *
   * Converts from a Qt URL.
   *
   * @param u the QUrl
   */
  KURL( const TQUrl &u );
  /**
   * @brief Constructor allowing relative URLs
   *
   * @warning It is dangerous to feed UNIX filenames into this function,
   * this will work most of the time but not always.
   *
   * For example <tt>"/home/Torben%20Weis"</tt> will be considered a URL
   * pointing to the file <tt>"/home/Torben Weis"</tt> instead
   * of to the file <tt>"/home/Torben%20Weis"</tt>.
   *
   * This means that if you have a usual UNIX like path you should not use
   * this constructor. Instead use fromPathOrURL()
   *
   * @param _baseurl The base url.
   * @param _rel_url A relative or absolute URL.
   *        If this is an absolute URL then @p _baseurl will be ignored.
   *        If this is a relative URL it will be combined with @p _baseurl.
   *        Note that @p _rel_url should be encoded too, in any case.
   *        So do NOT pass a path here (use setPath() or addPath() or
   *        fromPathOrURL() instead)
   * @param encoding_hint MIB of original encoding of URL.
   *        See TQTextCodec::mibEnum()
   *
   * @see fromPathOrURL()
   */
  KURL( const KURL& _baseurl, const TQString& _rel_url, int encoding_hint=0 );

  /**
   * @brief Returns the protocol for the URL
   *
   * Examples for a protocol string are @c "file", @c "http", etc. but also
   * @c "mailto:" and other pseudo protocols.
   *
   * @return the protocol of the URL, does not include the colon. If the
   *         URL is malformed, @c TQString::null will be returned
   *
   * @see setProtocol()
   * @see isValid()
   */
  TQString protocol() const { return m_bIsMalformed ? TQString::null : m_strProtocol; }
  /**
   * @brief Sets the protocol for the URL
   *
   * Examples for a protocol string are @c "file", @c "http", etc. but also
   * @c "mailto:" and other pseudo protocols.
   *
   * @param _txt the new protocol of the URL (without colon)
   *
   * @see protocol()
   */
  void setProtocol( const TQString& _txt );

  /**
   * @brief Returns the URI processing mode for the URL
   *
   * @return the URI processing mode set for this URL
   *
   * @see URIMode
   * @see uriModeForProtocol()
   *
   * @since 3.2
   */
  int uriMode() const;

  /**
   * @brief Returns the decoded user name (login, user id, etc) included in
   *        the URL
   *
   * @return the user name or @c TQString::null if there is no user name
   *
   * @see setUser()
   * @see hasUser()
   */
  TQString user() const { return m_strUser; }
  /**
   * @brief Sets the user name (login, user id, etc) to include in the URL
   *
   * Special characters in the user name will appear encoded in the URL.
   * If there is a password associated with the user, it can be set using
   * setPass().
   *
   * @param _txt the name of the user or @c TQString::null to remove the user
   *
   * @see user()
   * @see hasUser()
   * @see hasPass()
   */
  void setUser( const TQString& _txt );
  /**
   * @brief Tests if this URL has a user name included in it
   *
   * @return @c true if the URL has an non-empty user name
   *
   * @see user()
   * @see setUser()
   * @see hasPass()
   */
  bool hasUser() const { return !m_strUser.isEmpty(); }

  /**
   * @brief Returns the decoded password (corresponding to user()) included
   *        in the URL
   *
   * @note a password can only appear in a URL string if you also set
   * a user, see setUser().
   *
   * @return the password or @c TQString::null if it does not exist
   *
   * @see setPass()
   * @see hasPass()
   * @see hasUser()
   */
  TQString pass() const { return m_strPass; }
  /**
   * @brief Sets the password (corresponding to user()) to include in the URL
   *
   * Special characters in the password will appear encoded in the URL.
   * @note a password can only appear in a URL string if you also set
   * a user, see setUser().
   *
   * @param _txt the password to set or @c TQString::null to remove the password
   *
   * @see pass()
   * @see hasPass()
   * @see hasUser()
   */
  void setPass( const TQString& _txt );
  /**
   * @brief Tests if this URL has a password included in it
   *
   * @note a password can only appear in a URL string if you also set
   * a user, see setUser().
   *
   * @return @c true if there is a non-empty password set
   *
   * @see pass()
   * @see setPass()
   * @see hasUser()
   */
  bool hasPass() const { return !m_strPass.isEmpty(); }

  /**
   * @brief Returns the decoded hostname included in the URL
   *
   * @return the name of the host or @c TQString::null if no host is set
   *
   * @see setHost()
   * @see hasHost()
   */
  TQString host() const { return m_strHost; }

  /**
   * @brief Sets the hostname to include in the URL
   *
   * Special characters in the hostname will appear encoded in the URL.
   *
   * @param _txt the new name of the host or TQString::null to remove the host
   *
   * @see host()
   * @see hasHost()
   */
  void setHost( const TQString& _txt );
  /**
   * @brief Tests if this URL has a hostname included in it
   *
   * @return @c true if the URL has a non-empty host
   *
   * @see host()
   * @see setHost()
   */
  bool hasHost() const { return !m_strHost.isEmpty(); }

  /**
   * @brief Returns the port number included in the URL
   *
   * @return the port number or @c 0 if there is no port number specified in
   *         the URL
   *
   * @see setPort()
   * @see host()
   */
  unsigned short int port() const { return m_iPort; }
  /**
   * @brief Sets the port number to include in the URL
   *
   * @param _p the new port number or @c 0 to have no port number
   *
   * @see port()
   * @see setHost()
   */
  void setPort( unsigned short int _p );

  /**
   * @brief Returns the current decoded path
   *
   * This does @em not include the query.
   *
   * @return the path of the URL (without query), or @c TQString::null if no
   *         path is set
   *
   * @see path(int)
   * @see setPath()
   * @see hasPath()
   */
  TQString path() const  { return m_strPath; }

  /**
   * @brief Returns the current decoded path
   *
   * This does @em not include the query, see query() for accessing it.
   *
   * The @p _trailing parameter allows to ensure the existance or absence of
   * the last (trailing) @c '/' character in the path.
   * If the URL has no path, then no @c '/' is added anyway.
   * And on the other side: if the path is just @c "/", then this character
   * won't be stripped.
   *
   * Reason: <tt>"ftp://weis@host"</tt> means something completely different
   * than <tt>"ftp://weis@host/"</tt>.
   * So adding or stripping the '/' would really alter the URL, while
   * <tt>"ftp://host/path"</tt> and <tt>"ftp://host/path/"</tt> mean the same
   * directory.
   *
   * @param _trailing May be ( @c -1, @c 0, @c +1 ). @c -1 strips a trailing
   *                  @c '/', @c +1 adds a trailing @c '/' if there is none yet
   *                  and @c 0 returns the path unchanged
   *
   * @return the path of the URL (without query), or @c TQString::null if no
   *         path is set
   *
   * @see path()
   * @see setPath()
   * @see hasPath()
   * @see adjustPath()
   */
  TQString path( int _trailing ) const;

  /**
   * @brief Sets the decoded path of the URL
   *
   * This does @em not changed the  query, see setQuery() for that.
   *
   * The @p path is considered to be decoded, i.e. characters not allowed in
   * path, for example @c '?' will be encoded and does not indicate the
   * beginning of the query part. Something that might look encoded,
   * like @c "%3f" will not become decoded.
   *
   * @param path the new, decoded, path or @c TQString::null to remove the path
   *
   * @see path()
   * @see path(int)
   * @see hasPath()
   */
  void setPath( const TQString& path );

  /**
   * @brief Tests if this URL has a path included in it
   *
   * @return @c true if there is a non-empty path
   *
   * @see path()
   * @see setPath()
   */
  bool hasPath() const { return !m_strPath.isEmpty(); }

  /**
   * @brief Resolves @c "." and @c ".." components in path
   *
   * Some servers seem not to like the removal of extra @c '/'
   * even though it is against the specification in RFC 2396.
   *
   * @param cleanDirSeparator if @c true, occurrences of consecutive
   *        directory separators (e.g. <tt>"/foo//bar"</tt>) are cleaned up as
   *        well
   *
   * @see hasPath()
   * @see adjustPath()
   */
  void cleanPath(bool cleanDirSeparator = true);

  /**
   * @brief Adds or removes a trailing slash to/from the path
   *
   * The @p _trailing parameter allows to ensure the existance or absence of
   * the last (trailing) @c '/' character in the path.
   * If the URL has no path, then no @c '/' is added anyway.
   * And on the other side: if the path is just @c "/", then this character
   * won't be stripped.
   *
   * Reason: <tt>"ftp://weis@host"</tt> means something completely different
   * than <tt>"ftp://weis@host/"</tt>.
   * So adding or stripping the '/' would really alter the URL, while
   * <tt>"ftp://host/path"</tt> and <tt>"ftp://host/path/"</tt> mean the same
   * directory.
   *
   * @param _trailing May be ( @c -1, @c 0, @c +1 ). @c -1 strips a trailing
   *                  @c '/', @c +1 adds a trailing @c '/' if there is none yet
   *                  and @c 0 returns the path unchanged
   *
   * @see hasPath()
   * @see cleanPath()
   */
  void adjustPath(int _trailing);

  /**
   * @brief Sets both path and query of the URL in their encoded form
   *
   * This is useful for HTTP. It looks first for @c '?' and decodes then,
   * see setEncodedPath().
   * The encoded path is the concatenation of the current path and the query.
   *
   * @param _txt the new encoded path and encoded query
   * @param encoding_hint MIB of original encoding of @p _txt .
   *        See TQTextCodec::mibEnum()
   *
   * @see encodedPathAndQuery()
   * @see setPath()
   * @see setQuery()
   */
  void setEncodedPathAndQuery( const TQString& _txt, int encoding_hint = 0 );

  /**
   * @brief Sets the (already encoded) path of the URL
   *
   * @param _txt the new encoded path
   * @param encoding_hint MIB of original encoding of @p _txt .
   *        See TQTextCodec::mibEnum()
   *
   * @see setEncodedPathAndQuery()
   * @see setPath()
   */
  void setEncodedPath(const TQString& _txt, int encoding_hint = 0 );

  /**
   * @brief Returns the encoded path and the query
   *
   * The @p _trailing parameter allows to ensure the existance or absence of
   * the last (trailing) @c '/' character in the path.
   * If the URL has no path, then no @c '/' is added anyway.
   * And on the other side: if the path is just @c "/", then this character
   * won't be stripped.
   *
   * Reason: <tt>"ftp://weis@host"</tt> means something completely different
   * than <tt>"ftp://weis@host/"</tt>.
   * So adding or stripping the '/' would really alter the URL, while
   * <tt>"ftp://host/path"</tt> and <tt>"ftp://host/path/"</tt> mean the same
   * directory.
   *
   * @param _trailing May be ( @c -1, @c 0, @c +1 ). @c -1 strips a trailing
   *                  @c '/', @c +1 adds a trailing @c '/' if there is none yet
   *                  and @c 0 returns the path unchanged
   * @param _no_empty_path if set to @c true then an empty path is substituted
   *        by @c "/"
   * @param encoding_hint MIB of desired encoding of URL.
   *        See TQTextCodec::mibEnum()
   *
   * @return the concatenation of the encoded path , @c '?' and the
   *         encoded query
   *
   * @see setEncodedPathAndQuery()
   * @see path()
   * @see query()
   */
  TQString encodedPathAndQuery( int _trailing = 0, bool _no_empty_path = false, int encoding_hint = 0) const;

  /**
   * @brief Sets the encoded query of the URL
   *
   * The query should start with a @c '?'. If it doesn't @c '?' is prepended.
   *
   * @param _txt this is considered to be encoded. This has a good reason:
   *             the query may contain the @c '0' character
   *
   * @param encoding_hint MIB of the encoding. Reserved, should be @c 0 .
   *        See TQTextCodec::mibEnum()
   *
   * @see query()
   */
  void setQuery( const TQString& _txt, int encoding_hint = 0);

  /**
   * @brief Returns the encoded query of the URL
   *
   * The query may contain the @c '0' character.
   * If a query is present it always starts with a @c '?'.
   * A single @c '?' means an empty query.
   * An empty string means no query.
   *
   * @return the encoded query or @c TQString::null if there is none
   *
   * @see setQuery()
   */
  TQString query() const;

  /**
   * @brief Returns the encoded reference of the URL
   *
   * The reference is @em never decoded automatically.
   *
   * @return the undecoded reference, or @c TQString::null if there is none
   *
   * @see setRef()
   * @see hasRef()
   * @see htmlRef()
   */
  TQString ref() const { return m_strRef_encoded; }

  /**
   * @brief Sets the encoded reference part (everything after @c '#')
   *
   * This is considered to be encoded, i.e. characters that are not allowed
   * as part of the reference will @em not be encoded.
   *
   * @param _txt the encoded reference or @c TQString::null to remove it
   *
   * @see ref()
   * @see hasRef()
   */
  void setRef( const TQString& _txt ) { m_strRef_encoded = _txt; }

  /**
   * @brief Tests if the URL has a reference part
   *
   * @return @c true if the URL has a reference part. In a URL like
   *         <tt>"http://www.kde.org/tdebase.tar#tar:/README"</tt> it would
   *         return @c true as well
   *
   * @see ref()
   * @see setRef()
   */
  bool hasRef() const { return !m_strRef_encoded.isNull(); }

  /**
   * @brief Returns decoded the HTML-style reference
   *        (the part of the URL after @c '#')
   *
   * @return the HTML-style reference
   *
   * @see encodedHtmlRef()
   * @see setHTMLRef()
   * @see hasHTMLRef()
   * @see split()
   * @see hasSubURL()
   * @see ref()
   */
  TQString htmlRef() const;

  /**
   * @brief Returns the encoded HTML-style reference
   *        (the part of the URL after @c '#')
   *
   * @return the HTML-style reference in its original, encoded, form
   *
   * @see htmlRef()
   * @see setHTMLRef()
   * @see hasHTMLRef()
   */
  TQString encodedHtmlRef() const;

  /**
   * @brief Sets the decoded HTML-style reference
   *
   * @param _ref the new reference. This is considered to be @em not encoded in
   *         contrast to setRef(). Use @c TQString::null to remove it
   *
   * @see htmlRef()
   * @see hasHTMLRef()
   */
  void setHTMLRef( const TQString& _ref );

  /**
   * @brief Tests if there is an HTML-style reference
   *
   * @return @c true if the URL has an HTML-style reference
   *
   * @see htmlRef()
   * @see encodedHtmlRef()
   * @see setHTMLRef()
   * @see hasRef()
   */
  bool hasHTMLRef() const;

  /**
   * @brief Tests if the URL is well formed
   *
   * @return @c false if the URL is malformed. This function does @em not test
   *         whether sub URLs are well-formed as well
   */
  bool isValid() const  { return !m_bIsMalformed; }
  /**
   * @brief Tests if the URL is malformed
   *
   * @return @c true if the URL is malformed. This function does @em not test
   *         whether sub URLs are well-formed as well
   *
   * @deprecated Use !isValid() instead
   *
   * @see isValid()
   */
  KDE_DEPRECATED bool isMalformed() const { return !isValid(); }

  /**
   * @brief Tests if the file is local
   *
   * @return @c true if the file is a plain local file and has no filter
   *         protocols attached to it
   */
  bool isLocalFile() const;

  /**
   * @brief Adds file encoding information
   *
   * Adds encoding information to the URL by adding a @c "charset" parameter.
   * If there is already a charset parameter, it will be replaced.
   *
   * @param encoding the encoding to add or @c TQString::null to remove the
   *                 encoding
   *
   * @see fileEncoding()
   * @see TQTextCodec::codecForName()
   */
  void setFileEncoding(const TQString &encoding);

  /**
   * @brief Returns encoding information of the URL
   *
   * The encoding information is the content of the @c "charset" parameter.
   *
   * @return an encoding suitable for TQTextCodec::codecForName()
   *         or @c TQString::null if not encoding was specified
   */
  TQString fileEncoding() const;

  /**
   * @brief Tests if the URL has any sub URLs
   *
   * See split() for examples for sub URLs.
   *
   * @return @c true if the file has at least one sub URL
   *
   * @see split()
   */
  bool hasSubURL() const;

  /**
   * @brief Adds to the current path
   *
   * Assumes that the current path is a directory. @p _txt is appended to the
   * current path. The function adds @c '/' if needed while concatenating.
   * This means it does not matter whether the current path has a trailing
   * @c '/' or not. If there is none, it becomes appended. If @p _txt
   * has a leading @c '/' then this one is stripped.
   *
   * @param txt the text to add. It is considered to be decoded
   *
   * @see setPath()
   * @see hasPath()
   */
  void addPath( const TQString& txt );

  /**
   * @brief Returns the value of a certain query item
   *
   * @param item item whose value we want
   *
   * @return the value of the given query item name or @c TQString::null if the
   *         specified item does not exist
   *
   * @see addQueryItem()
   * @see removeQueryItem()
   * @see queryItems()
   * @see query()
   */
  TQString queryItem( const TQString& item ) const;

  /**
   * @brief Returns the value of a certain query item
   *
   * @param item item whose value we want
   * @param encoding_hint MIB of encoding of query.
   *        See TQTextCodec::mibEnum()
   *
   * @return the value of the given query item name or @c TQString::null if the
   *         specified item does not exist
   *
   * @see addQueryItem()
   * @see removeQueryItem()
   * @see queryItems()
   * @see query()
   */
  TQString queryItem( const TQString& item, int encoding_hint ) const;

  /**
   * Options for queryItems()
   *
   * @since 3.1
   */
  enum QueryItemsOptions
  {
    /**
     * Normalize query keys to lowercase
     */
    CaseInsensitiveKeys = 1
  };

  /**
   * @internal, override for the below function
   */
  TQMap< TQString, TQString > queryItems( int options=0 ) const;

  /**
   * @brief Returns the list of query items as a map mapping keys to values
   *
   * @param options any of QueryItemsOptions <em>OR</em>ed together
   * @param encoding_hint MIB of encoding of query.
   *        See TQTextCodec::mibEnum()
   *
   * @return the map of query items or the empty map if the URL has no
   *         query items
   *
   * @see queryItem()
   * @see addQueryItem()
   * @see removeQueryItem()
   * @see query()
   *
   * @since 3.1
   */
  TQMap< TQString, TQString > queryItems( int options, int encoding_hint ) const;

  /**
   * @brief Adds an additional query item
   *
   * To replace an existing query item, the item should first be
   * removed with removeQueryItem()
   *
   * @param _item name of item to add
   * @param _value value of item to add
   * @param encoding_hint MIB of encoding to use for _value.
   *        See TQTextCodec::mibEnum()
   *
   * @see queryItem()
   * @see queryItems()
   * @see query()
   */
  void addQueryItem( const TQString& _item, const TQString& _value, int encoding_hint = 0 );

  /**
   * @brief Removea an item from the query
   *
   * @param _item name of item to remove
   *
   * @see addQueryItem()
   * @see queryItem()
   * @see queryItems()
   * @see query()
   */
  void removeQueryItem( const TQString& _item );

  /**
   * @brief Sets the filename of the path
   *
   * In comparison to addPath() this function does not assume that the current
   * path is a directory. This is only assumed if the current path ends
   * with @c '/'.
   *
   * If the current path ends with @c '/' then @p _txt is just appended,
   * otherwise all text behind the last @c '/' in the current path is erased
   * and @p _txt is appended then. It does not matter whether @p _txt starts
   * with @c '/' or not.
   *
   * Any reference is reset.
   *
   * @param _txt the filename to be set. It is considered to be decoded
   *
   * @see fileName()
   * @see setDirectory()
   * @see setPath()
   */
  void setFileName( const TQString&_txt );

  /**
   * @brief Returns the filename of the path
   *
   * @p _ignore_trailing_slash_in_path tells whether a trailing @c '/' should
   * be ignored. This means that the function would return @c "torben" for
   * <tt>"file:///hallo/torben/"</tt> and <tt>"file:///hallo/torben"</tt>.
   *
   * @param _ignore_trailing_slash_in_path if set to @c false, then everything
   *        behind the last @c '/' is considered to be the filename
   *
   * @return the filename of the current path. The returned string is decoded.
   *         @c TQString::null if there is no file (and thus no path)
   *
   * @see setFileName()
   * @see directory()
   * @see path()
   */
  TQString fileName( bool _ignore_trailing_slash_in_path = true ) const;

  /**
   * @brief Returns the directory of the path
   *
   * The directory is everything between the last and the second last @c '/'
   * is returned. For example <tt>"file:///hallo/torben/"</tt> would return
   * <tt>"/hallo/torben/"</tt> while <tt>"file:///hallo/torben"</tt> would
   * return <tt>"hallo/"</tt>.
   *
   * @p _ignore_trailing_slash_in_path tells whether a trailing @c '/' should
   * be ignored. This means that the function would return @c "/hallo"
   * (or @c "/hallo" depending on @p _strip_trailing_slash_from_result) for
   * <tt>"file:///hallo/torben/"</tt> and <tt>"file:///hallo/torben"</tt>.
   *
   * @param _strip_trailing_slash_from_result tells whether the returned result
   *        should end with @c '/' or not. If the path is empty or just @c "/"
   *        then this flag has no effect
   * @param _ignore_trailing_slash_in_path if set to @c false, then everything
   *        behind the last @c '/' is considered to be the filename
   *
   * @return the directory part of the current path or @c TQString::null when
   *         there is no path. The returned string is decoded
   *
   * @see setDirectory()
   * @see fileName()
   * @see path()
   */
  TQString directory( bool _strip_trailing_slash_from_result = true,
		     bool _ignore_trailing_slash_in_path = true ) const;

  /**
   * @brief Sets the directory of the path, leaving the filename empty
   *
   * @param dir the decoded directory to set
   *
   * @see directory()
   * @see setFileName()
   * @see setPath()
   */
  void setDirectory(const TQString &dir);

  /**
   * @brief Changes the directory by descending into the given directory
   *
   * It is assumed the current URL represents a directory.
   * If @p _dir starts with a @c '/' the current URL will be
   * <tt>"protocol://host/dir"</tt> otherwise @p _dir will be appended to the
   * path. @p _dir can be @c ".."
   *
   * This function won't strip protocols. That means that when you are in
   * <tt>"file:///dir/dir2/my.tgz#tar:/"</tt> and you do <tt>cd("..")</tt> you
   * will still be in <tt>"file:///dir/dir2/my.tgz#tar:/"</tt>
   *
   * @param _dir the directory to change to
   * @return @c true if successful
   *
   * @see directory()
   * @see path()
   */
  bool cd( const TQString& _dir );

  /**
   * @brief Returns the URL as string, with all escape sequences intact,
   *        encoded in a given charset
   *
   * This is used in particular for encoding URLs in UTF-8 before using them
   * in a drag and drop operation.
   *
   * @note that the string returned by url() will include the password of the
   * URL. If you want to show the URL to the user, use prettyURL().
   *
   * The @p _trailing parameter allows to ensure the existance or absence of
   * the last (trailing) @c '/' character in the path.
   * If the URL has no path, then no @c '/' is added anyway.
   * And on the other side: if the path is just @c "/", then this character
   * won't be stripped.
   *
   * Reason: <tt>"ftp://weis@host"</tt> means something completely different
   * than <tt>"ftp://weis@host/"</tt>.
   * So adding or stripping the '/' would really alter the URL, while
   * <tt>"ftp://host/path"</tt> and <tt>"ftp://host/path/"</tt> mean the same
   * directory.
   *
   * @param _trailing May be ( @c -1, @c 0, @c +1 ). @c -1 strips a trailing
   *                  @c '/', @c +1 adds a trailing @c '/' if there is none yet
   *                  and @c 0 returns the path unchanged
   * @param encoding_hint MIB of encoding to use.
   *        See TQTextCodec::mibEnum()
   *
   * @return the complete URL, with all escape sequences intact, encoded
   *         in a given charset
   *
   * @see prettyURL()
   * @see pathOrURL()
   * @see htmlURL()
   */
  TQString url( int _trailing = 0, int encoding_hint = 0) const;

  /**
   * @brief Returns the URL as string in human-friendly format
   *
   * Example:
   * @code
   * http://localhost:8080/test.cgi?test=hello world&name=fred
   * @endcode
   *
   * Does @em not contain the password if the URL has one, use url() if you
   * need to have it in the string.
   *
   * The @p _trailing parameter allows to ensure the existance or absence of
   * the last (trailing) @c '/' character in the path.
   * If the URL has no path, then no @c '/' is added anyway.
   * And on the other side: if the path is just @c "/", then this character
   * won't be stripped.
   *
   * Reason: <tt>"ftp://weis@host"</tt> means something completely different
   * than <tt>"ftp://weis@host/"</tt>.
   * So adding or stripping the '/' would really alter the URL, while
   * <tt>"ftp://host/path"</tt> and <tt>"ftp://host/path/"</tt> mean the same
   * directory.
   *
   * @param _trailing May be ( @c -1, @c 0, @c +1 ). @c -1 strips a trailing
   *                  @c '/', @c +1 adds a trailing @c '/' if there is none yet
   *                  and @c 0 returns the path unchanged
   * @return a human readable URL, with no non-necessary encodings/escaped
   *         characters. Password will not be shown
   *
   * @see url()
   * @see pathOrURL()
   */
  TQString prettyURL( int _trailing = 0) const;

  /**
   * @brief Returns the URL as string in human-friendly format
   * Example:
   * @code
   * http://localhost:8080/test.cgi?test=hello world&name=fred
   * @endcode
   *
   * Does @em not contain the password if the URL has one, use url() if you
   * need to have it in the string.
   *
   * The @p _trailing parameter allows to ensure the existance or absence of
   * the last (trailing) @c '/' character in the path.
   * If the URL has no path, then no @c '/' is added anyway.
   * And on the other side: if the path is just @c "/", then this character
   * won't be stripped.
   *
   * Reason: <tt>"ftp://weis@host"</tt> means something completely different
   * than <tt>"ftp://weis@host/"</tt>.
   * So adding or stripping the '/' would really alter the URL, while
   * <tt>"ftp://host/path"</tt> and <tt>"ftp://host/path/"</tt> mean the same
   * directory.
   *
   * @param _trailing May be ( @c -1, @c 0, @c +1 ). @c -1 strips a trailing
   *                  @c '/', @c +1 adds a trailing @c '/' if there is none yet
   *                  and @c 0 returns the path unchanged
   * @param _flags if StripFileProtocol, @c "file://" will be stripped.
   *        The use of this method is now discouraged, better use pathOrURL().
   *
   * @return a human readable URL, with no non-necessary encodings/escaped
   *         characters. Password will not be shown
   *
   * @see prettyURL()
   * @see url()
   * @see pathOrURL()
   */
  TQString prettyURL( int _trailing, AdjustementFlags _flags) const;
  // ### BIC: Merge the two above + spell it as "Adjustment"
  // Or remove completely, and let people use pathOrURL() instead

  /**
   * @brief Returns the URL as a string depending if it is a local file
   *
   * It will be either the URL (as prettyURL() would return) or, when the URL
   * is a local file without query or ref, the path().
   *
   * Use this method, together with its opposite, fromPathOrURL(),
   * to display and even let the user edit URLs.
   *
   * @return the path or URL string depending on its properties
   *
   * @see prettyURL()
   * @see path()
   * @see url()
   * @see isLocalFile()
   *
   * @since 3.4
   */
  TQString pathOrURL() const;

  /**
   * @brief Returns the URL as string, escaped for HTML
   *
   * @return a human readable URL, with no non-necessary encodings/escaped
   *         characters which is HTML encoded for safe inclusion in HTML or
   *         rich text. Password will not be shown.
   *
   * @see prettyURL()
   * @see url()
   * @see pathOrURL()
   */
  TQString htmlURL() const;


  /**
   * @brief Tests if the KURL is empty
   *
   * An empty URL has neither path nor protocol set.
   *
   * @return @c true if the URL is empty
   *
   * @see hasPath()
   * @see protocol()
   * @see isValid()
   */
  bool isEmpty() const;

  /**
   * @brief Returns the URL that is the best possible candidate for on level
   *        higher in the path hierachy
   *
   * This function is useful to implement the "Up" button in a file manager for
   * example.
   * cd() never strips a sub-protocol. That means that if you are in
   * <tt>"file:///home/x.tgz#gzip:/#tar:/"</tt> and hit the up button you
   * expect to see <tt>"file:///home"</tt>. The algorithm tries to go up on the
   * right-most URL. If that is not possible it strips the right most URL. It
   * continues stripping URLs until it can go up.
   *
   * @return a URL that is a level higher
   *
   * @see cd()
   * @see split()
   * @see hasSubURL()
   * @see path()
   */
  KURL upURL( ) const;

  /**
   * @brief Tests if this URL is less than the given URL
   *
   * The current URL is consideres <tt>"less than"</tt> then @p _u if
   * (tested in this order):
   * - it is not valid but @p _u is. See isValid()
   * - its protocol is "less than" @p _u's protocol. See protocol()
   * - its host is "less than" @p _u's host. See host()
   * - its port is "less than" @p _u's port. See port()
   * - its path is "less than" @p _u's path. See path()
   * - its encoded query is "less than" @p _u's encoded query. See query()
   * - its endoded reference is "less than" @p _u's encoded reference.
   *   See ref()
   * - its username is "less than" @p _u's username. See user()
   * - its password is "less than" @p _u's password. See pass()
   *
   * Examples:
   * @code
   * KURL url1;
   * KURL url2;
   *
   * bool lessThan = url1 < url2; // false. Both invalid, no protocols
   *
   * url2.setProtocol( TQString::null );
   * lessThan = url1 < url2;            // true. url2 is valid because of setProtocol()
   *
   * url1.setProtocol( TQString::null );
   * lessThan = url1 < url2;            // false. Both valid and everything empty
   *
   * url1.setProtocol( "http" );
   * url2.setProtocol( "https" );
   * lessThan = url1 < url2;            // true. "http" < "https"
   *
   * url2.setHost( "api.kde.org" );
   * url2.setProtocol( "http" );
   * url2.setProtocol( "www.kde.org" );
   * lessThan = url1 < url2;            // true. protocols equal and "api" < "www"
   *
   * url1.setProtocol( "https" );
   * url2.setProtocol( "http" );
   * lessThan = url1 < url2;            // false. "https" > "http". host doesn't matter yet
   * @endcode
   *
   * @param _u the URL to compare to
   *
   * @return @c true if the URL is less than @p _u. Otherwise @c false
   *         (equal or greater than)
   *
   * @see operator==()
   * @see TQString::compare()
   */
  bool operator<(const KURL& _u) const;

  /**
   * @brief Copies the values of the given URL into this one
   *
   * Just assigns each member using the member's assignment operator.
   *
   * @param _u the URL to take the values from
   *
   * @return a reference to this URL (*this)
   *
   * @see equals()
   */
  KURL& operator=( const KURL& _u );

  /**
   * @brief Assigns the URL, given as a string, to this one
   *
   * This will reset the current URL and parse the given string.
   * See the similar constructor for known limitations.
   *
   * @param _url the TQString to parse for values
   *
   * @return a reference to this URL (*this)
   *
   * @see equals()
   * @see KURL(const TQString &, int)
   */
  KURL& operator=( const TQString& _url );

  /**
   * @brief Assigns the URL, given as a C string, to this one
   *
   * This will reset the current URL and parse the given string.
   * See the similar constructor for known limitations.
   *
   * @param _url the C string to parse for values
   *
   * @return a reference to this URL (*this)
   *
   * @see equals()
   * @see KURL(const char *, int)
   */
  KURL& operator=( const char * _url );

  /**
   * @brief Assigns the URL, given as a Qt URL, to this one
   *
   * This will reset the current URL and parse the given string.
   *
   * @param u the Qt URL to take the values from
   *
   * @return a reference to this URL (*this)
   *
   * @see equals()
   * @see KURL(const TQUrl &)
   */
  KURL& operator=( const TQUrl & u );

  /**
   * @brief Tests if this URL is equal to the given one
   *
   * Tests each member for equality unless one of the URLs is invalid
   * in which case they are not considered equal (even if both are invalid).
   *
   * Same as equals() when used with @p ignore_trailing set to
   * @c false (default)
   *
   * @param _u the URL to compare to
   *
   * @return @c true if equal and neither this URL nor @p _u is malformed.
   *         Otherwise @c false
   *
   * @see equals()
   * @see isValid()
   * @see operator!=()
   * @see operator<()
   */
  bool operator==( const KURL& _u ) const;

  /**
   * @brief Tests if this URL is equal to the one given as a string
   *
   * Creates a KURL instance for @p _u and compares with that using
   * the equality operator for two KURLs.
   *
   * See the respective constructor for known limitations.
   *
   * @param _u the string to compare to
   *
   * @return @c true if equal and neither this URL nor @p _u is malformed.
   *         Otherwise @c false
   *
   * @see KURL(const TQString &, int)
   * @see operator==(const KURL &)
   * @see equals()
   * @see isValid()
   * @see operator!=()
   * @see operator<()
   */
  bool operator==( const TQString& _u ) const;

  /**
   * @brief Tests if this URL is different from the given one
   *
   * Tests by negating the result of operator==()
   *
   * @param _u the URL to compare to
   *
   * @return the negated result of operator==()
   *
   * @see operator==()
   * @see operator<()
   */
  bool operator!=( const KURL& _u ) const { return !( *this == _u ); }

  /**
   * @brief Tests if this URL is different from the one given as a string
   *
   * Tests by negating the result of operator==(const TQString &)
   *
   * @param _u the URL to compare to
   *
   * @return the negated result of operator==(const TQString &)
   *
   * @see operator==(const TQString &)
   * @see operator<()
   */
  bool operator!=( const TQString& _u ) const { return !( *this == _u ); }

  /**
   * @brief Compares this URL with another one
   *
   * The same as equals(), just with a less obvious name.
   *
   * @param u the URL to compare this one with
   * @param ignore_trailing set to @c true to ignore trailing @c '/' characters
   *
   * @return @c true if both URLs are the same
   *
   * @see operator==. This function should be used if you want to
   *      ignore trailing @c '/' characters
   *
   * @deprecated Use equals() instead.
   */
  bool cmp( const KURL &u, bool ignore_trailing = false ) const KDE_DEPRECATED;

  /**
   * @brief Compares this URL with another one
   *
   * @param u the URL to compare this one with
   * @param ignore_trailing set to @c true to ignore trailing @c '/' characters
   *
   * @return @c true if both urls are the same
   *
   * @see operator==. This function should be used if you want to
   *      ignore trailing @c '/' characters
   *
   * @since 3.1
   */
  bool equals( const KURL &u, bool ignore_trailing = false ) const; // TODO KDE4: add bool _ignore_ref = false

  /**
   * @brief Tests if the given URL is parent of this URL
   *
   * For instance, <tt>"ftp://host/dir/"</tt> is a parent of
   * <tt>"ftp://host/dir/subdir/subsubdir/"</tt>.
   *
   * @return @c true if this URL is a parent of @p u (or the same URL as @p u)
   *
   * @see equals()
   * @see cd()
   */
  bool isParentOf( const KURL& u ) const;

  /**
   * @brief Splits nested URLs into a list of URLs
   *
   * Example for a nested URL:
   * @code
   * file:///home/weis/kde.tgz#gzip:/#tar:/tdebase
   * @endcode
   * A URL like <tt>"http://www.kde.org#tar:/kde/README.hml#ref1"</tt> will be
   * split in <tt>"http://www.kde.org#ref1"</tt> and
   * <tt>"tar:/kde/README.html#ref1"</tt>.
   *
   * That means in turn that @c "#ref1" is an HTML-style reference and not a
   * new sub URL. Since HTML-style references mark a certain position in a
   * document this reference is appended to every URL.
   *
   * The idea behind this is that browsers, for example, only look at the first
   * URL while the rest is not of interest to them.
   *
   * @param _url the URL that has to be split
   *
   * @return an empty list on error or the list of split URLs
   *
   * @see hasSubURL()
   * @see KURL(const TQString&, int)
   * @see join()
   */
  static List split( const TQString& _url );

  /**
   * @brief Splits nested URLs into a list of URLs
   *
   * Example for a nested URL:
   * @code
   * file:///home/weis/kde.tgz#gzip:/#tar:/tdebase
   * @endcode
   * A URL like <tt>"http://www.kde.org#tar:/kde/README.hml#ref1"</tt> will be
   * split in <tt>"http://www.kde.org#ref1"</tt> and
   * <tt>"tar:/kde/README.html#ref1"</tt>.
   *
   * That means in turn that @c "#ref1" is an HTML-style reference and not a
   * new sub URL. Since HTML-style references mark a certain position in a
   * document this reference is appended to every URL.
   *
   * The idea behind this is that browsers, for example, only look at the first
   * URL while the rest is not of interest to them.
   *
   * @param _url the URL that has to be split
   *
   * @return an empty list on error or the list of split URLs
   *
   * @see hasSubURL()
   * @see join()
   */
  static List split( const KURL& _url );

  /**
   * @brief Joins a list of URLs into a single URL with sub URLs
   *
   * Reverses split(). Only the first URL may have a reference. This reference
   * is considered to be HTML-like and is appended at the end of the resulting
   * joined URL.
   *
   * @param _list the list to join
   *
   * @return the joined URL or an invalid URL if the list is empty
   *
   * @see split()
   */
  static KURL join( const List& _list );

  /**
   * @brief Creates a KURL object from a TQString representing either an
   *        absolute path or a real URL
   *
   * Use this method instead of
   * @code
   * TQString someDir = ...
   * KURL url = someDir;
   * @endcode
   *
   * Otherwise some characters (e.g. the '#') won't be encoded properly.
   *
   * @param text the string representation of the URL to convert
   *
   * @return the new KURL
   *
   * @see pathOrURL()
   * @see KURL(const TQString&, int)
   *
   * @since 3.1
   */
  static KURL fromPathOrURL( const TQString& text );

  /**
   * @brief Encodes a string for use in URLs
   *
   * Convenience function.
   *
   * Convert tqunicoded string to local encoding and use %%-style
   * encoding for all common delimiters / non-ascii characters.
   *
   * @param str the string to encode (can be @c TQString::null)
   * @param encoding_hint MIB of encoding to use.
   *        See TQTextCodec::mibEnum()
   *
   * @return the encoded string
   *
   * @see encode_string_no_slash()
   * @see decode_string()
   */
  static TQString encode_string(const TQString &str, int encoding_hint = 0);

  /**
   * @brief Encodes a string for use in URLs
   *
   * Convenience function.
   *
   * Convert tqunicoded string to local encoding and use %%-style
   * encoding for all common delimiters and non-ascii characters
   * as well as the slash @c '/'.
   *
   * @param str the string to encode (can be @c TQString::null)
   * @param encoding_hint MIB of encoding to use.
   *        See TQTextCodec::mibEnum()
   *
   * @see encode_string()
   * @see decode_string()
   */
  static TQString encode_string_no_slash(const TQString &str, int encoding_hint = 0);

  /**
   * @brief Decodes a string as used in URLs
   *
   * Convenience function.
   *
   * Decode %-style encoding and convert from local encoding to tqunicode.
   *
   * Reverse of encode_string()
   *
   * @param str the string to decode (can be @c TQString::null)
   * @param encoding_hint MIB of original encoding of @p str .
   *        See TQTextCodec::mibEnum()
   *
   * @return the decoded string
   *
   * @see encode_string()
   * @see encode_string_no_slash()
   */
  static TQString decode_string(const TQString &str, int encoding_hint = 0);

  /**
   * @brief Tests if a given URL is a relative as opposed to an absolute URL
   *
   * Convenience function.
   *
   * Returns whether @p _url is likely to be a "relative" URL instead of
   * an "absolute" URL.
   *
   * @param _url the URL to examine
   * @return @c true when the URL is likely to be "relative",
   *         @c false otherwise
   *
   * @see relativeURL()
   */
  static bool isRelativeURL(const TQString &_url);

  /**
   * @brief Creates an URL relative to a base URL for a given input URL
   *
   * Convenience function
   *
   * Returns a "relative URL" based on @p base_url that points to @p url.
   *
   * If no "relative URL" can be created, e.g. because the protocol
   * and/or hostname differ between @p base_url and @p url an absolute
   * URL is returned.
   *
   * @note if @p base_url represents a directory, it should contain
   *       a trailing slash
   *
   * @param base_url the URL to derive from
   * @param url the URL to point to relatively from @p base_url
   * @param encoding_hint MIB of original encoding of @p str .
   *        See TQTextCodec::mibEnum()
   *
   * @see isRelativeURL()
   * @see relativePath()
   * @see adjustPath()
   */
  static TQString relativeURL(const KURL &base_url, const KURL &url, int encoding_hint = 0);

  /**
   * @brief Creates a path relative to a base path for a given input path
   *
   * Convenience function
   *
   * Returns a relative path based on @p base_dir that points to @p path.
   *
   * @param base_dir the base directory to derive from
   * @param path the new target directory
   * @param isParent an optional pointer to a boolean which, if provided, will
   *        be set to reflect whether @p path has @p base_dir as a parent dir
   *
   * @see relativeURL()
   */
  static TQString relativePath(const TQString &base_dir, const TQString &path, bool *isParent=0);

  /**
   * @brief Determines which URI mode is suitable for processing URIs of a
   *        given protocol
   *
   * @param protocol the protocol name. See protocol()
   *
   * @return the URIMode suitable for the given protocol
   *
   * @see uriMode()
   *
   * @since 3.2
   */
  static URIMode uriModeForProtocol(const TQString& protocol);

#ifdef KDE_NO_COMPAT
private:
#endif
  /**
   * @deprecated change code to call fileName()
   */
	TQString filename( bool _ignore_trailing_slash_in_path = true ) const
  {
    return fileName(_ignore_trailing_slash_in_path);
  }

protected:
  /**
   * @brief Resets the members to their "null" state
   *
   * All TQString members get reset to @c TQString::null, the port to @c 0
   * the URIMode to @c Auto and the URL becomes invalid.
   *
   * This is like assigning a null URL, but more efficient as it doesn't
   * require the temporary object.
   *
   * Called by constructors, assignment operators and the parse methods in case
   * of a parsing error.
   *
   * @see isValid()
   * @see isEmpty()
   */
  void reset();
  
  /**
   * @brief Parses the given string and fills the URL's values on success
   *
   * Treats the string as an URL.
   *
   * @param _url the string to parse
   * @param encoding_hint MIB of original encoding of @p str .
   *        See TQTextCodec::mibEnum()
   */
  void parseURL( const TQString& _url, int encoding_hint = 0 );
  /**
   * @brief Parses the given string and fills the URL's values on success
   *
   * Treats the string as a generic URI.
   *
   * @param _url the string to parse
   * @param encoding_hint MIB of original encoding of @p str .
   *        See TQTextCodec::mibEnum()
   */
  void parseRawURI( const TQString& _url, int encoding_hint = 0 );
  /**
   * @brief Parses the given string and fills the URL's values on success
   *
   * Treats the string as a @c "mailto:" URI.
   *
   * @param _url the string to parse
   * @param encoding_hint MIB of original encoding of @p str .
   *        See TQTextCodec::mibEnum()
   */
  void parseMailto( const TQString& _url, int encoding_hint = 0 );
  /**
   * @brief Parses the given string and fills the URL's values on success
   *
   * @param _url the string to parse
   * @param encoding_hint MIB of original encoding of @p str .
   *        See TQTextCodec::mibEnum()
   */
  void parse( const TQString& _url, int encoding_hint = 0 );

private:
  void _setQuery( const TQString& _txt, int encoding_hint = 0);

  TQString m_strProtocol;
  TQString m_strUser;
  TQString m_strPass;
  TQString m_strHost;
  TQString m_strPath;
  TQString m_strRef_encoded;
  TQString m_strQuery_encoded;
  bool m_bIsMalformed : 1;
  enum URIMode m_iUriMode : 3;
  uint freeForUse     : 4;
  unsigned short int m_iPort;
  TQString m_strPath_encoded;

  friend TDECORE_EXPORT TQDataStream & operator<< (TQDataStream & s, const KURL & a);
  friend TDECORE_EXPORT TQDataStream & operator>> (TQDataStream & s, KURL & a);
private:
  KURLPrivate* d;
};

/**
 * \relates KURL
 * Compares URLs. They are parsed, split and compared.
 * Two malformed URLs with the same string representation
 * are nevertheless considered to be unequal.
 * That means no malformed URL equals anything else.
 */
TDECORE_EXPORT bool urlcmp( const TQString& _url1, const TQString& _url2 );

/**
 * \relates KURL
 * Compares URLs. They are parsed, split and compared.
 * Two malformed URLs with the same string representation
 * are nevertheless considered to be unequal.
 * That means no malformed URL equals anything else.
 *
 * @param _url1 A reference URL
 * @param _url2 A URL that will be compared with the reference URL
 * @param _ignore_trailing Described in KURL::cmp
 * @param _ignore_ref If true, disables comparison of HTML-style references.
 */
TDECORE_EXPORT bool urlcmp( const TQString& _url1, const TQString& _url2, bool _ignore_trailing, bool _ignore_ref );

TDECORE_EXPORT TQDataStream & operator<< (TQDataStream & s, const KURL & a);
TDECORE_EXPORT TQDataStream & operator>> (TQDataStream & s, KURL & a);

#endif