summaryrefslogtreecommitdiff
path: root/src/tabs.py
blob: e04f330e321581204ad754535f266ad5c1c59640 (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
# Copyright 2010-2011 Le Coz Florent <louiz@louiz.org>
#
# This file is part of Poezio.
#
# Poezio is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, version 3 of the License.
#
# Poezio 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Poezio.  If not, see <http://www.gnu.org/licenses/>.

"""
a Tab object is a way to organize various Windows (see windows.py)
around the screen at once.
A tab is then composed of multiple Buffer.
Each Tab object has different refresh() and resize() methods, defining how its
Windows are displayed, resized, etc
"""

MIN_WIDTH = 50
MIN_HEIGHT = 16

import logging
log = logging.getLogger(__name__)

from gettext import gettext as _

import windows
import theme
import curses
import difflib
import text_buffer
import string
import common
import core
import singleton
import xhtml
import weakref
import timed_events

import multiuserchat as muc

from sleekxmpp.xmlstream.stanzabase import JID
from config import config
from roster import RosterGroup, roster
from contact import Contact, Resource
from user import User
from os import getenv, path
from logger import logger

from datetime import datetime, timedelta

SHOW_NAME = {
    'dnd': _('busy'),
    'away': _('away'),
    'xa': _('not available'),
    'chat': _('chatty'),
    '': _('available')
    }

NS_MUC_USER = 'http://jabber.org/protocol/muc#user'

class Tab(object):
    number = 0
    tab_core = None
    def __init__(self):
        self.input = None
        self._color_state = theme.COLOR_TAB_NORMAL
        self.need_resize = False
        self.nb = Tab.number
        Tab.number += 1
        self.need_resize = False
        self.key_func = {}      # each tab should add their keys in there
                                # and use them in on_input
        self.commands = {}      # and their own commands

    @property
    def core(self):
        if not Tab.tab_core:
            Tab.tab_core = singleton.Singleton(core.Core)
        return Tab.tab_core

    @property
    def info_win(self):
        return self.core.information_win

    @staticmethod
    def resize(scr):
        Tab.size = (Tab.height, Tab.width) = scr.getmaxyx()

    def complete_commands(self, the_input):
        """
        Does command completion on the specified input for both global and tab-specific
        commands.
        This should be called from the completion method (on tab, for example), passing
        the input where completion is to be made.
        It can completion the command name itself or an argument of the command.
        Returns True if a completion was made, False else.
        """
        txt = the_input.get_text()
        # check if this is a command
        if txt.startswith('/') and not txt.startswith('//'):
            # check if we are in the middle of the command name
            if len(txt.split()) > 1 or\
                    (txt.endswith(' ') and not the_input.last_completion):
                command_name = txt.split()[0][1:]
                if command_name in self.core.commands:
                    command = self.core.commands[command_name]
                elif command_name in self.commands:
                    command = self.commands[command_name]
                else:           # Unknown command, cannot complete
                    return False
                if command[2] is None:
                    return False # There's no completion function
                else:
                    return command[2](the_input)
            else:
                # complete the command's name
                words = ['/%s'% (name) for name in self.core.commands] +\
                    ['/%s' % (name) for name in self.commands]
                the_input.auto_completion(words, '')
                return True
        return False

    def execute_command(self, provided_text):
        """
        Execute the command in the input and return False if
        the input didn't contain a command
        """
        txt = provided_text or self.input.key_enter()
        if txt.startswith('/') and not txt.startswith('//') and\
                not txt.startswith('/me '):
            command = txt.strip().split()[0][1:]
            arg = txt[2+len(command):] # jump the '/' and the ' '
            if command in self.commands: # check tab-specific commands
                self.commands[command][0](arg)
            elif command in self.core.commands: # check global commands
                self.core.commands[command][0](arg)
            else:
                low = command.lower()
                if low in self.commands:
                    self.commands[low][0](arg)
                elif low in self.core.commands:
                    self.core.commands[low][0](arg)
                else:
                    self.core.information(_("Unknown command (%s)") % (command), _('Error'))
            return True
        else:
            return False

    def refresh(self):
        """
        Called on each screen refresh (when something has changed)
        """
        raise NotImplementedError

    def get_color_state(self):
        """
        returns the color that should be used in the GlobalInfoBar
        """
        return self._color_state

    def set_color_state(self, color):
        """
        set the color state
        """
        pass

    def get_name(self):
        """
        get the name of the tab
        """
        return self.__class__.__name__

    def get_text_window(self):
        """
        Returns the principal TextWin window, if there's one
        """
        return None

    def on_input(self, key):
        pass

    def on_lose_focus(self):
        """
        called when this tab loses the focus.
        """
        self._color_state = theme.COLOR_TAB_NORMAL

    def on_gain_focus(self):
        """
        called when this tab gains the focus.
        """
        self._color_state = theme.COLOR_TAB_CURRENT

    def add_message(self):
        """
        Adds a message in the tab.
        If the tab cannot add a message in itself (for example
        FormTab, where text is not intented to be appened), it returns False.
        If the tab can, it returns True
        """
        return False

    def on_scroll_down(self):
        """
        Defines what happens when we scrol down
        """
        pass

    def on_scroll_up(self):
        """
        Defines what happens when we scrol down
        """
        pass

    def on_info_win_size_changed(self):
        """
        Called when the window with the informations is resized
        """
        pass

    def just_before_refresh(self):
        """
        Method called just before the screen refresh.
        Particularly useful to move the cursor at the
        correct position.
        """
        pass

    def on_close(self):
        """
        Called when the tab is to be closed
        """
        if self.input:
            self.input.on_delete()

    def __del__(self):
        log.debug('------ Closing tab %s' % self.__class__.__name__)

class ChatTab(Tab):
    """
    A tab containing a chat of any type.
    Just use this class instead of Tab if the tab needs a recent-words completion
    Also, ^M is already bound to on_enter
    And also, add the /say command
    """
    def __init__(self, room):
        Tab.__init__(self)
        self._room = room
        self.remote_wants_chatstates = None # change this to True or False when
        # we know that the remote user wants chatstates, or not.
        # None means we don’t know yet, and we send only "active" chatstates
        self.chatstate = None   # can be "active", "composing", "paused", "gone", "inactive"
        # We keep a weakref of the event that will set our chatstate to "paused", so that
        # we can delete it or change it if we need to
        self.timed_event_paused = None
        # if that’s None, then no paused chatstate was sent recently
        # if that’s a weakref returning None, then a paused chatstate was sent
        # since the last input
        self.key_func['M-v'] = self.move_separator
        self.key_func['M-/'] = self.last_words_completion
        self.key_func['^M'] = self.on_enter
        self.commands['say'] =  (self.command_say,
                                 _("""Usage: /say <message>\nSay: Just send the message.
                                        Useful if you want your message to begin with a '/'"""), None)
        self.chat_state = None

    def last_words_completion(self):
        """
        Complete the input with words recently said
        """
        # build the list of the recent words
        char_we_dont_want = string.punctuation+' '
        words = list()
        for msg in self._room.messages[:-40:-1]:
            if not msg:
                continue
            txt = msg.txt
            for char in char_we_dont_want:
                txt = txt.replace(char, ' ')
            for word in txt.split():
                if len(word) >= 4 and word not in words:
                    words.append(word)
        self.input.auto_completion(words, ' ')

    def on_enter(self):
        txt = self.input.key_enter()
        if txt:
            clean_text = xhtml.clean_text(txt)
            if not self.execute_command(clean_text):
                if txt.startswith('//'):
                    txt = txt[1:]
                self.command_say(txt)
        self.cancel_paused_delay()

    def send_chat_state(self, state):
        """
        Send an empty chatstate message
        """
        if not isinstance(self, MucTab) or self.get_room().joined:
            if state in ('active', 'inactive', 'gone') and self.core.status.show in ('xa', 'away'):
                return
            msg = self.core.xmpp.make_message(self.get_name())
            msg['type'] = self.message_type
            msg['chat_state'] = state
            self.chat_state = state
            msg.send()

    def send_composing_chat_state(self, empty_before, empty_after):
        """
        Send the "active" or "composing" chatstate, depending
        on the the current status of the input
        """
        if config.get('send_chat_states', 'true') == 'true' and self.remote_wants_chatstates:
            if self.chat_state == "composing" and not empty_after:
                self.cancel_paused_delay()
                self.set_paused_delay(True)
            elif empty_after and not self.chat_state == 'active':
                self.cancel_paused_delay()
                self.send_chat_state("active")
            elif empty_after:
                self.cancel_paused_delay()
            elif empty_before or (self.timed_event_paused is not None and not self.timed_event_paused()):
                self.cancel_paused_delay()
                self.send_chat_state("composing")
                self.set_paused_delay(True)

    def set_paused_delay(self, composing):
        """
        we create a timed event that will put us to paused
        in a few seconds
        """
        if config.get('send_chat_states', 'true') != 'true':
            return
        if self.timed_event_paused:
            # check the weakref
            event = self.timed_event_paused()
            if event:
                # the event already exists: we just update
                # its date
                event.change_date(datetime.now() + timedelta(seconds=4))
                return
        new_event = timed_events.DelayedEvent(4, self.send_chat_state, 'paused')
        self.core.add_timed_event(new_event)
        self.timed_event_paused = weakref.ref(new_event)

    def cancel_paused_delay(self):
        """
        Remove that event from the list and set it to None.
        Called for example when the input is emptied, or when the message
        is sent
        """
        if self.timed_event_paused:
            event = self.timed_event_paused()
            if event:
                self.core.remove_timed_event(event)
                del event
        self.timed_event_paused = None

    def move_separator(self):
        self.text_win.remove_line_separator()
        self.text_win.add_line_separator()
        self.text_win.refresh(self._room)
        self.input.refresh()

    def command_say(self, line):
        raise NotImplementedError

class MucTab(ChatTab):
    """
    The tab containing a multi-user-chat room.
    It contains an userlist, an input, a topic, an information and a chat zone
    """
    message_type = 'groupchat'
    def __init__(self, room):
        ChatTab.__init__(self, room)
        self.remote_wants_chatstates = True
        # We send active, composing and paused states to the MUC because
        # the chatstate may or may not be filtered by the MUC,
        # that’s not our problem.
        self.topic_win = windows.Topic()
        self.text_win = windows.TextWin()
        room.add_window(self.text_win)
        self.v_separator = windows.VerticalSeparator()
        self.user_win = windows.UserList()
        self.info_header = windows.MucInfoWin()
        self.tab_win = windows.GlobalInfoBar()
        self.input = windows.MessageInput()
        self.ignores = []       # set of Users
        # keys
        self.key_func['^I'] = self.completion
        self.key_func['M-u'] = self.scroll_user_list_down
        self.key_func['M-y'] = self.scroll_user_list_up
        # commands
        self.commands['ignore'] = (self.command_ignore, _("Usage: /ignore <nickname> \nIgnore: Ignore a specified nickname."), None)
        self.commands['unignore'] = (self.command_unignore, _("Usage: /unignore <nickname>\nUnignore: Remove the specified nickname from the ignore list."), self.completion_unignore)
        self.commands['kick'] =  (self.command_kick, _("Usage: /kick <nick> [reason]\nKick: Kick the user with the specified nickname. You also can give an optional reason."), None)
        self.commands['topic'] = (self.command_topic, _("Usage: /topic <subject>\nTopic: Change the subject of the room"), self.completion_topic)
        self.commands['query'] = (self.command_query, _('Usage: /query <nick> [message]\nQuery: Open a private conversation with <nick>. This nick has to be present in the room you\'re currently in. If you specified a message after the nickname, it will immediately be sent to this user'), None)
        self.commands['part'] = (self.command_part, _("Usage: /part [message]\nPart: disconnect from a room. You can specify an optional message."), None)
        self.commands['nick'] = (self.command_nick, _("Usage: /nick <nickname>\nNick: Change your nickname in the current room"), None)
        self.commands['recolor'] = (self.command_recolor, _('Usage: /recolor\nRecolor: Re-assign a color to all participants of the current room, based on the last time they talked. Use this if the participants currently talking have too many identical colors.'), None)
        self.commands['cycle'] = (self.command_cycle, _('Usage: /cycle [message]\nCycle: Leaves the current room and rejoin it immediately'), None)
        self.commands['info'] = (self.command_info, _('Usage: /info <nickname>\nInfo: Display some information about the user in the MUC: his/here role, affiliation, status and status message.'), None)
        self.commands['configure'] = (self.command_configure, _('Usage: /configure\nConfigure: Configure the current room, through a form.'), None)
        self.commands['version'] = (self.command_version, _('Usage: /version <jid or nick>\nVersion: get the software version of the given JID or nick in room (usually its XMPP client and Operating System)'), None)
        self.commands['names'] = (self.command_names, _('Usage: /names\nNames: get the list of the users in the room, and the list of the people assuming the different roles.'), None)
        self.resize()

    def scroll_user_list_up(self):
        self.user_win.scroll_up()
        self.user_win.refresh(self._room.users)
        self.input.refresh()

    def scroll_user_list_down(self):
        self.user_win.scroll_down()
        self.user_win.refresh(self._room.users)
        self.input.refresh()

    def command_info(self, arg):
        args = common.shell_split(arg)
        if len(args) != 1:
            return self.core.information("Info command takes only 1 argument")
        user = self.get_room().get_user_by_name(args[0])
        if not user:
            return self.core.information("Unknown user: %s" % args[0])
        self.get_room().add_message("%s%s: show: %s, affiliation: %s, role: %s%s"% (args[0], ' (%s)'%user.jid if user.jid else '', user.show or 'Available', user.role or 'None', user.affiliation or 'None', '\n%s' % user.status if user.status else ''))
        self.text_win.refresh(self._room)
        self.input.refresh()

    def command_configure(self, arg):
        form = self.core.xmpp.plugin['xep_0045'].getRoomForm(self.get_name())
        if not form:
            return
        self.core.open_new_form(form, self.cancel_config, self.send_config)

    def cancel_config(self, form):
        """
        The user do not want to send his/her config, send an iq cancel
        """
        self.core.xmpp.plugin['xep_0045'].cancelConfig(self.get_name())
        self.core.close_tab()

    def send_config(self, form):
        """
        The user sends his/her config to the server
        """
        self.core.xmpp.plugin['xep_0045'].configureRoom(self.get_name(), form)
        self.core.close_tab()

    def command_cycle(self, arg):
        if self.get_room().joined:
            muc.leave_groupchat(self.core.xmpp, self.get_name(), self.get_room().own_nick, arg)
        self.get_room().disconnect()
        self.core.command_join('/', "0")

    def command_recolor(self, arg):
        """
        Re-assign color to the participants of the room
        """
        room = self.get_room()
        compare_users = lambda x: x.last_talked
        users = list(room.users)
        # search our own user, to remove it from the room
        for user in users:
            if user.nick == room.own_nick:
                users.remove(user)
        nb_color = len(theme.LIST_COLOR_NICKNAMES)
        for i, user in enumerate(sorted(users, key=compare_users, reverse=True)):
            user.color = theme.LIST_COLOR_NICKNAMES[i % nb_color]
        self.text_win.rebuild_everything(self._room)
        self.text_win.refresh(self._room)
        self.input.refresh()

    def command_version(self, arg):
        """
        /version <jid or nick>
        """
        def callback(res):
            if not res:
                return self.core.information('Could not get the software version from %s' % (jid,), 'Warning')
            version = '%s is running %s version %s on %s' % (jid,
                                                             res.get('name') or _('an unknown software'),
                                                             res.get('version') or _('unknown'),
                                                             res.get('os') or _('on an unknown platform'))
            self.core.information(version, 'Info')

        args = common.shell_split(arg)
        if len(args) < 1:
            return
        if args[0] in [user.nick for user in self.get_room().users]:
            jid = self._room.name + '/' + args[0]
        else:
            jid = args[0]
        self.core.xmpp.plugin['xep_0092'].get_version(jid, callback=callback)

    def command_nick(self, arg):
        """
        /nick <nickname>
        """
        args = common.shell_split(arg)
        if len(args) != 1:
            return
        nick = args[0]
        room = self.get_room()
        if not room.joined:
            return
        current_status = self.core.get_status()
        muc.change_nick(self.core.xmpp, room.name, nick, current_status.message, current_status.show)

    def command_part(self, arg):
        """
        /part [msg]
        """
        args = arg.split()
        room = self.get_room()
        if len(args):
            msg = ' '.join(args)
        else:
            msg = None
        if self.get_room().joined:
            muc.leave_groupchat(self.core.xmpp, room.name, room.own_nick, arg)
        self.core.close_tab()

    def command_query(self, arg):
        """
        /query <nick> [message]
        """
        args = common.shell_split(arg)
        if len(args) < 1:
            return
        nick = args[0]
        room = self.get_room()
        r = None
        for user in room.users:
            if user.nick == nick:
                r = self.core.open_private_window(room.name, user.nick)
        if r and len(args) > 1:
            msg = arg[len(nick)+1:]
            muc.send_private_message(self.core.xmpp, r.name, msg)
            self.core.add_message_to_text_buffer(r, msg, None, r.own_nick)
        if not r:
            self.core.information(_("Cannot find user: %s" % nick), 'Error')

    def command_topic(self, arg):
        """
        /topic [new topic]
        """
        if not arg.strip():
            self.core.add_message_to_text_buffer(self.get_room(),
                                                 _("The subject of the room is: %s") % self.get_room().topic)
            self.text_win.refresh(self.get_room())
            self.input.refresh()
            return
        subject = arg
        muc.change_subject(self.core.xmpp, self.get_room().name, subject)

    def command_names(self, arg=None):
        """
        /names
        """
        room = self.get_room()
        if not room.joined:
            return
        users, visitors, moderators, participants, others = [], [], [], [], []
        for user in room.users:
            if user.role == 'visitor':
                visitors.append(user.nick)
            elif user.role == 'participant':
                participants.append(user.nick)
            elif user.role == 'moderator':
                moderators.append(user.nick)
            else:
                others.append(user.nick)
            users.append(user.nick)

        message = ''
        roles = (('Users', users), ('Visitors', visitors), ('Participants', participants), ('Moderators', moderators), ('Others', others))
        for role in roles:
            if role[1]:
                role[1].sort()
                message += '%s: %i\n    ' % (role[0], len(role[1]))
                last = role[1].pop()
                for item in role[1]:
                    message += '%s, ' % item
                message += '%s\n' % last

        self.core.add_message_to_text_buffer(room, message)
        self.text_win.refresh(self.get_room())
        self.input.refresh()

    def completion_topic(self, the_input):
        current_topic = self.get_room().topic
        return the_input.auto_completion([current_topic], ' ')

    def command_kick(self, arg):
        """
        /kick <nick> [reason]
        """
        args = common.shell_split(arg)
        if len(args) < 1:
            self.core.command_help('kick')
            return
        nick = args[0]
        if len(args) >= 2:
            reason = ' '.join(args[1:])
        else:
            reason = ''
        if not self.get_room().joined:
            return
        res = muc.eject_user(self.core.xmpp, self.get_name(), nick, reason)
        if res['type'] == 'error':
            self.core.room_error(res, self.get_name())

    def command_say(self, line):
        msg = self.core.xmpp.make_message(self.get_name())
        msg['type'] = 'groupchat'
        if line.find('\x19') == -1:
            msg['body'] = line
        else:
            msg['body'] = xhtml.clean_text(line)
            msg['xhtml_im'] = xhtml.poezio_colors_to_html(line)
        if config.get('send_chat_states', 'true') == 'true' and self.remote_wants_chatstates is not False:
            msg['chat_state'] = 'active'
        self.cancel_paused_delay()
        msg.send()

    def command_ignore(self, arg):
        """
        /ignore <nick>
        """
        args = common.shell_split(arg)
        if len(args) != 1:
            self.core.command_help('ignore')
            return
        nick = args[0]
        user = self._room.get_user_by_name(nick)
        if not user:
            self.core.information(_('%s is not in the room') % nick)
        elif user in self.ignores:
            self.core.information(_('%s is already ignored') % nick)
        else:
            self.ignores.append(user)
            self.core.information(_("%s is now ignored") % nick, 'info')

    def command_unignore(self, arg):
        """
        /unignore <nick>
        """
        args = common.shell_split(arg)
        if len(args) != 1:
            self.core.command_help('unignore')
            return
        nick = args[0]
        user = self._room.get_user_by_name(nick)
        if not user:
            self.core.information(_('%s is not in the room') % nick)
        elif user not in self.ignores:
            self.core.information(_('%s is not ignored') % nick)
        else:
            self.ignores.remove(user)
            self.core.information(_('%s is now unignored') % nick)

    def completion_unignore(self, the_input):
        return the_input.auto_completion([user.nick for user in self.ignores], ' ')

    def resize(self):
        """
        Resize the whole window. i.e. all its sub-windows
        """
        text_width = (self.width//10)*9
        self.topic_win.resize(1, self.width, 0, 0)
        self.v_separator.resize(self.height-3, 1, 1, 9*(self.width//10))
        self.text_win.resize(self.height-4-self.core.information_win_size, text_width, 1, 0)
        self.text_win.rebuild_everything(self._room)
        self.user_win.resize(self.height-3-self.core.information_win_size-1, self.width-text_width-1, 1, text_width+1)
        self.info_header.resize(1, self.width, self.height-3-self.core.information_win_size, 0)
        self.tab_win.resize(1, self.width, self.height-2, 0)
        self.input.resize(1, self.width, self.height-1, 0)

    def refresh(self):
        if self.need_resize:
            self.resize()
        log.debug('  TAB   Refresh: %s'%self.__class__.__name__)
        self.topic_win.refresh(self._room.get_single_line_topic())
        self.text_win.refresh(self._room)
        self.v_separator.refresh()
        self.user_win.refresh(self._room.users)
        self.info_header.refresh(self._room, self.text_win)
        self.tab_win.refresh()
        self.info_win.refresh(self.core.informations)
        self.input.refresh()

    def on_input(self, key):
        if key in self.key_func:
            self.key_func[key]()
            return False
        empty_before = self.input.get_text() == '' or (self.input.get_text().startswith('/') and not self.input.get_text().startswith('//'))
        self.input.do_command(key)
        empty_after = self.input.get_text() == '' or (self.input.get_text().startswith('/') and not self.input.get_text().startswith('//'))
        self.send_composing_chat_state(empty_before, empty_after)
        return False

    def completion(self):
        """
        Called when Tab is pressed, complete the nickname in the input
        """
        if self.complete_commands(self.input):
            return

        # If we are not completing a command or a command's argument, complete a nick
        compare_users = lambda x: x.last_talked
        word_list = [user.nick for user in sorted(self._room.users, key=compare_users, reverse=True)\
                         if user.nick != self._room.own_nick]
        after = config.get('after_completion', ',')+" "
        if ' ' not in self.input.get_text() or (self.input.last_completion and\
                     self.input.get_text()[:-len(after)] == self.input.last_completion):
            add_after = after
        else:
            add_after = ' '

        empty_before = self.input.get_text() == '' or (self.input.get_text().startswith('/') and not self.input.get_text().startswith('//'))
        self.input.auto_completion(word_list, add_after)
        empty_after = self.input.get_text() == '' or (self.input.get_text().startswith('/') and not self.input.get_text().startswith('//'))
        self.send_composing_chat_state(empty_before, empty_after)

    def get_color_state(self):
        return self._room.color_state

    def set_color_state(self, color):
        self._room.set_color_state(color)

    def get_name(self):
        return self._room.name

    def get_text_window(self):
        return self.text_win

    def get_room(self):
        return self._room

    def on_lose_focus(self):
        self._room.set_color_state(theme.COLOR_TAB_NORMAL)
        self.text_win.remove_line_separator()
        self.text_win.add_line_separator()
        if config.get('send_chat_states', 'true') == 'true' and not self.input.get_text():
            self.send_chat_state('inactive')

    def on_gain_focus(self):
        self._room.set_color_state(theme.COLOR_TAB_CURRENT)
        if self.text_win.built_lines and self.text_win.built_lines[-1] is None:
            self.text_win.remove_line_separator()
        curses.curs_set(1)
        if self.get_room().joined and config.get('send_chat_states', 'true') == 'true' and not self.input.get_text():
            self.send_chat_state('active')

    def on_scroll_up(self):
        self.text_win.scroll_up(self.text_win.height-1)

    def on_scroll_down(self):
        self.text_win.scroll_down(self.text_win.height-1)

    def on_info_win_size_changed(self):
        if self.core.information_win_size >= self.height-3:
            return
        text_width = (self.width//10)*9
        self.text_win.resize(self.height-4-self.core.information_win_size, text_width, 1, 0)
        self.info_header.resize(1, self.width, self.height-3-self.core.information_win_size, 0)
        self.user_win.resize(self.height-3-self.core.information_win_size-1, self.width-text_width-1, 1, text_width+1)

    def handle_presence(self, presence):
        from_nick = presence['from'].resource
        from_room = presence['from'].bare
        status_codes = set([s.attrib['code'] for s in presence.findall('{%s}x/{%s}status' % (NS_MUC_USER, NS_MUC_USER))])
        # Check if it's not an error presence.
        if presence['type'] == 'error':
            return self.core.room_error(presence, from_room)
        affiliation = presence['muc']['affiliation']
        show = presence['show']
        status = presence['status']
        role = presence['muc']['role']
        jid = presence['muc']['jid']
        typ = presence['type']
        room = self.get_room()
        if not room.joined:     # user in the room BEFORE us.
            # ignore redondant presence message, see bug #1509
            if from_nick not in [user.nick for user in room.users] and typ != "unavailable":
                new_user = User(from_nick, affiliation, show, status, role, jid)
                room.users.append(new_user)
                if from_nick == room.own_nick:
                    room.joined = True
                    new_user.color = theme.COLOR_OWN_NICK
                    room.add_message(_("\x195Your nickname is \x193%s") % (from_nick))
                    if '170' in status_codes:
                        room.add_message('\x191Warning: \x195this room is publicly logged')
        else:
            change_nick = '303' in status_codes
            kick = '307' in status_codes and typ == 'unavailable'
            ban = '301' in status_codes and typ == 'unavailable'
            user = room.get_user_by_name(from_nick)
            # New user
            if not user:
                self.on_user_join(room, from_nick, affiliation, show, status, role, jid)
            # nick change
            elif change_nick:
                self.on_user_nick_change(room, presence, user, from_nick, from_room)
            elif ban:
                self.on_user_banned(room, presence, user, from_nick)
            # kick
            elif kick:
                self.on_user_kicked(room, presence, user, from_nick)
            # user quit
            elif typ == 'unavailable':
                self.on_user_leave_groupchat(room, user, jid, status, from_nick, from_room)
            # status change
            else:
                self.on_user_change_status(room, user, from_nick, from_room, affiliation, role, show, status)
        if self.core.current_tab() is self:
            self.text_win.refresh(self._room)
            self.user_win.refresh(self._room.users)
            self.info_header.refresh(self._room, self.text_win)
            self.input.refresh()
            self.core.doupdate()

    def on_user_join(self, room, from_nick, affiliation, show, status, role, jid):
        """
        When a new user joins the groupchat
        """
        room.users.append(User(from_nick, affiliation,
                               show, status, role, jid))
        hide_exit_join = config.get('hide_exit_join', -1)
        if hide_exit_join != 0:
            if not jid.full:
                room.add_message('\x194%(spec)s \x193%(nick)s\x195 joined the room' % {'nick':from_nick, 'spec':theme.CHAR_JOIN})
            else:
                room.add_message('\x194%(spec)s \x193%(nick)s \x195(\x194%(jid)s\x195) joined the room' % {'spec':theme.CHAR_JOIN, 'nick':from_nick, 'jid':jid.full})

    def on_user_nick_change(self, room, presence, user, from_nick, from_room):
        new_nick = presence.find('{%s}x/{%s}item' % (NS_MUC_USER, NS_MUC_USER)).attrib['nick']
        if user.nick == room.own_nick:
            room.own_nick = new_nick
            # also change our nick in all private discussion of this room
            for _tab in self.core.tabs:
                if isinstance(_tab, PrivateTab) and JID(_tab.get_name()).bare == room.name:
                    _tab.get_room().own_nick = new_nick
        user.change_nick(new_nick)
        room.add_message('\x193%(old)s\x195 is now known as \x193%(new)s' % {'old':from_nick, 'new':new_nick})
        # rename the private tabs if needed
        self.core.rename_private_tabs(room.name, from_nick, new_nick)

    def on_user_banned(self, room, presence, user, from_nick):
        """
        When someone is banned from a muc
        """
        room.users.remove(user)
        by = presence.find('{%s}x/{%s}item/{%s}actor' % (NS_MUC_USER, NS_MUC_USER, NS_MUC_USER))
        reason = presence.find('{%s}x/{%s}item/{%s}reason' % (NS_MUC_USER, NS_MUC_USER, NS_MUC_USER))
        by = by.attrib['jid'] if by is not None else None
        if from_nick == room.own_nick: # we are banned
            room.disconnect()
            if by:
                kick_msg = _('\x191%(spec)s \x193You\x195 have been banned by \x194%(by)s') % {'spec': theme.CHAR_KICK, 'by':by}
            else:
                kick_msg = _('\x191%(spec)s \x193You\x195 have been banned.') % {'spec':theme.CHAR_KICK}
        else:
            if by:
                kick_msg = _('\x191%(spec)s \x193%(nick)s\x195 has been banned by \x194%(by)s') % {'spec':theme.CHAR_KICK, 'nick':from_nick, 'by':by}
            else:
                kick_msg = _('\x191%(spec)s \x193%(nick)s\x195 has been banned') % {'spec':theme.CHAR_KICK, 'nick':from_nick.replace('"', '\\"')}
        if reason is not None and reason.text:
            kick_msg += _('\x195 Reason: \x196%(reason)s\x195') % {'reason': reason.text}
        room.add_message(kick_msg)

    def on_user_kicked(self, room, presence, user, from_nick):
        """
        When someone is kicked from a muc
        """
        room.users.remove(user)
        by = presence.find('{%s}x/{%s}item/{%s}actor' % (NS_MUC_USER, NS_MUC_USER, NS_MUC_USER))
        reason = presence.find('{%s}x/{%s}item/{%s}reason' % (NS_MUC_USER, NS_MUC_USER, NS_MUC_USER))
        by = by.attrib['jid'] if by is not None else None
        if from_nick == room.own_nick: # we are kicked
            room.disconnect()
            if by:
                kick_msg = _('\x191%(spec)s \x193You\x195 have been kicked by \x193%(by)s') % {'spec': theme.CHAR_KICK, 'by':by}
            else:
                kick_msg = _('\x191%(spec)s \x193You\x195 have been kicked.') % {'spec':theme.CHAR_KICK}
            # try to auto-rejoin
            if config.get('autorejoin', 'false') == 'true':
                muc.join_groupchat(self.core.xmpp, room.name, room.own_nick)
        else:
            if by:
                kick_msg = _('\x191%(spec)s \x193%(nick)s\x195 has been kicked by \x193%(by)s') % {'spec':theme.CHAR_KICK.replace('"', '\\"'), 'nick':from_nick.replace('"', '\\"'), 'by':by.replace('"', '\\"')}
            else:
                kick_msg = _('\x191%(spec)s \x193%(nick)s\x195 has been kicked') % {'spec':theme.CHAR_KICK, 'nick':from_nick.replace('"', '\\"')}
        if reason is not None and reason.text:
            kick_msg += _('\x195 Reason: \x196%(reason)s') % {'reason': reason.text}
        room.add_message(kick_msg)

    def on_user_leave_groupchat(self, room, user, jid, status, from_nick, from_room):
        """
        When an user leaves a groupchat
        """
        room.users.remove(user)
        if room.own_nick == user.nick:
            # We are now out of the room. Happens with some buggy (? not sure) servers
            room.disconnect()
        hide_exit_join = config.get('hide_exit_join', -1) if config.get('hide_exit_join', -1) >= -1 else -1
        if hide_exit_join == -1 or user.has_talked_since(hide_exit_join):
            if not jid.full:
                leave_msg = _('\x191%(spec)s \x193%(nick)s\x195 has left the room') % {'nick':from_nick, 'spec':theme.CHAR_QUIT}
            else:
                leave_msg = _('\x191%(spec)s \x193%(nick)s\x195 (\x194%(jid)s\x195) has left the room') % {'spec':theme.CHAR_QUIT, 'nick':from_nick, 'jid':jid.full}
            if status:
                leave_msg += ' (%s)' % status
            room.add_message(leave_msg)
            self.core.refresh_window()
        self.core.on_user_left_private_conversation(from_room, from_nick, status)

    def on_user_change_status(self, room, user, from_nick, from_room, affiliation, role, show, status):
        """
        When an user changes her status
        """
        # build the message
        display_message = False # flag to know if something significant enough
        # to be displayed has changed
        msg = _('\x193%s\x195 changed: ')% from_nick.replace('"', '\\"')
        if show not in SHOW_NAME:
            self.core.information("%s from room %s sent an invalid show: %s" %\
                                      (from_nick, from_room, show), "warning")
        if affiliation != user.affiliation:
            msg += _('affiliation: %s, ') % affiliation
            display_message = True
        if role != user.role:
            msg += _('role: %s, ') % role
            display_message = True
        if show != user.show and show in SHOW_NAME:
            msg += _('show: %s, ') % SHOW_NAME[show]
            display_message = True
        if status != user.status:
            # if the user sets his status to nothing
            if not status and show in SHOW_NAME:
                msg += _('show: %s, ') % SHOW_NAME[show]
            else:
                msg += _('status: %s, ') % status
            display_message = True

        if not display_message:
            return
        msg = msg[:-2] # remove the last ", "
        hide_status_change = config.get('hide_status_change', -1) if config.get('hide_status_change', -1) >= -1 else -1
        if (hide_status_change == -1 or \
                user.has_talked_since(hide_status_change) or\
                user.nick == room.own_nick)\
                and\
                (affiliation != user.affiliation or\
                    role != user.role or\
                    show != user.show or\
                    status != user.status):
            # display the message in the room
            room.add_message(msg)
        self.core.on_user_changed_status_in_private('%s/%s' % (from_room, from_nick), msg)
        # finally, effectively change the user status
        user.update(affiliation, show, status, role)

class PrivateTab(ChatTab):
    """
    The tab containg a private conversation (someone from a MUC)
    """
    message_type = 'chat'
    def __init__(self, room):
        ChatTab.__init__(self, room)
        self.text_win = windows.TextWin()
        room.add_window(self.text_win)
        self.info_header = windows.PrivateInfoWin()
        self.tab_win = windows.GlobalInfoBar()
        self.input = windows.MessageInput()
        # keys
        self.key_func['^I'] = self.completion
        # commands
        #self.commands['info'] = (self.command_info, _('Usage: /info\nInfo: Display some information about the user in the MUC: '), None)
        self.commands['unquery'] = (self.command_unquery, _("Usage: /unquery\nUnquery: close the tab"), None)
        self.commands['part'] = (self.command_unquery, _("Usage: /part\nPart: close the tab"), None)
        self.resize()

    def completion(self):
        self.complete_commands(self.input)

    def command_say(self, line):
        msg = self.core.xmpp.make_message(self.get_name())
        msg['type'] = 'chat'
        if line.find('\x19') == -1:
            msg['body'] = line
        else:
            msg['body'] = xhtml.clean_text(line)
            msg['xhtml_im'] = xhtml.poezio_colors_to_html(line)
        if config.get('send_chat_states', 'true') == 'true' and self.remote_wants_chatstates is not False:
            msg['chat_state'] = 'active'
        msg.send()
        self.core.add_message_to_text_buffer(self.get_room(), line, None, self.core.own_nick)
        logger.log_message(JID(self.get_name()).bare, self.core.own_nick, line)
        self.cancel_paused_delay()
        self.text_win.refresh(self._room)
        self.input.refresh()

    def command_unquery(self, arg):
        """
        /unquery
        """
        self.core.close_tab()

    def resize(self):
        if self.core.information_win_size >= self.height-3:
            return
        self.text_win.resize(self.height-3-self.core.information_win_size, self.width, 0, 0)
        self.text_win.rebuild_everything(self._room)
        self.info_header.resize(1, self.width, self.height-3-self.core.information_win_size, 0)
        self.tab_win.resize(1, self.width, self.height-2, 0)
        self.input.resize(1, self.width, self.height-1, 0)

    def refresh(self):
        if self.need_resize:
            self.resize()
        log.debug('  TAB   Refresh: %s'%self.__class__.__name__)
        self.text_win.refresh(self._room)
        self.info_header.refresh(self._room, self.text_win, self.chatstate)
        self.info_win.refresh(self.core.informations)
        self.tab_win.refresh()
        self.input.refresh()

    def refresh_info_header(self):
        self.info_header.refresh(self._room, self.text_win, self.chatstate)
        self.input.refresh()

    def get_color_state(self):
        if self._room.color_state == theme.COLOR_TAB_NORMAL or\
                self._room.color_state == theme.COLOR_TAB_CURRENT:
            return self._room.color_state
        return theme.COLOR_TAB_PRIVATE

    def set_color_state(self, color):
        self._room.color_state = color

    def get_name(self):
        return self._room.name

    def on_input(self, key):
        if key in self.key_func:
            self.key_func[key]()
            return False
        empty_before = self.input.get_text() == '' or (self.input.get_text().startswith('/') and not self.input.get_text().startswith('//'))
        self.input.do_command(key)
        empty_after = self.input.get_text() == '' or (self.input.get_text().startswith('/') and not self.input.get_text().startswith('//'))
        tab = self.core.get_tab_by_name(JID(self.get_room().name).bare, MucTab)
        if tab and tab.get_room().joined:
            self.send_composing_chat_state(empty_before, empty_after)
        return False

    def on_lose_focus(self):
        self._room.set_color_state(theme.COLOR_TAB_NORMAL)
        self.text_win.remove_line_separator()
        self.text_win.add_line_separator()
        if self.get_room().joined and config.get('send_chat_states', 'true') == 'true' and not self.input.get_text():
            self.send_chat_state('inactive')

    def on_gain_focus(self):
        self._room.set_color_state(theme.COLOR_TAB_CURRENT)
        curses.curs_set(1)
        if self.get_room().joined and config.get('send_chat_states', 'true') == 'true' and not self.input.get_text():
            self.send_chat_state('active')

    def on_scroll_up(self):
        self.text_win.scroll_up(self.text_win.height-1)

    def on_scroll_down(self):
        self.text_win.scroll_down(self.text_win.height-1)

    def on_info_win_size_changed(self):
        if self.core.information_win_size >= self.height-3:
            return
        self.text_win.resize(self.height-3-self.core.information_win_size, self.width, 0, 0)
        self.info_header.resize(1, self.width, self.height-3-self.core.information_win_size, 0)

    def get_room(self):
        return self._room

    def get_text_window(self):
        return self.text_win

    def rename_user(self, old_nick, new_nick):
        """
        The user changed her nick in the corresponding muc: update the tab’s name and
        display a message.
        """
        self.get_room().add_message(_('"[%(old_nick)s]" is now known as "[%(new_nick)s]"') % {'old_nick':old_nick.replace('"', '\\"'), 'new_nick':new_nick.replace('"', '\\"')})
        new_jid = JID(self.get_room().name).bare+'/'+new_nick
        self.get_room().name = new_jid

    def user_left(self, status_message, from_nick):
        """
        The user left the associated MUC
        """
        if not status_message:
            self.get_room().add_message(_('\x191%(spec)s \x193%(nick)s\x195 has left the room') % {'nick':from_nick.replace('"', '\\"'), 'spec':theme.CHAR_QUIT.replace('"', '\\"')})
        else:
            self.get_room().add_message(_('\x191%(spec)s \x193%(nick)s\x195 has left the room (%(status)s)"') % {'nick':from_nick.replace('"', '\\"'), 'spec':theme.CHAR_QUIT, 'status': status_message.replace('"', '\\"')})

class RosterInfoTab(Tab):
    """
    A tab, splitted in two, containing the roster and infos
    """
    def __init__(self):
        Tab.__init__(self)
        self.name = "Roster"
        self.v_separator = windows.VerticalSeparator()
        self.tab_win = windows.GlobalInfoBar()
        self.information_win = windows.TextWin()
        self.core.information_buffer.add_window(self.information_win)
        self.roster_win = windows.RosterWin()
        self.contact_info_win = windows.ContactInfoWin()
        self.default_help_message = windows.HelpText("Enter commands with “/”. “o”: toggle offline show")
        self.input = self.default_help_message
        self.set_color_state(theme.COLOR_TAB_NORMAL)
        self.key_func['^I'] = self.completion
        self.key_func[' '] = self.on_space
        self.key_func["/"] = self.on_slash
        self.key_func["KEY_UP"] = self.move_cursor_up
        self.key_func["KEY_DOWN"] = self.move_cursor_down
        self.key_func["M-u"] = self.move_cursor_to_next_group
        self.key_func["M-y"] = self.move_cursor_to_prev_group
        self.key_func["M-[1;5B"] = self.move_cursor_to_next_group
        self.key_func["M-[1;5A"] = self.move_cursor_to_prev_group
        self.key_func["o"] = self.toggle_offline_show
        self.key_func["s"] = self.start_search
        self.key_func["S"] = self.start_search_slow
        self.commands['deny'] = (self.command_deny, _("Usage: /deny [jid]\nDeny: Use this command to remove and deny your presence to the provided JID (or the selected contact in your roster), who is asking you to be in his/here roster"), self.completion_deny)
        self.commands['accept'] = (self.command_accept, _("Usage: /accept [jid]\nAccept: Use this command to authorize the provided JID (or the selected contact in your roster), to see your presence, and to ask to subscribe to it (mutual presence subscription)."), self.completion_deny)
        self.commands['add'] = (self.command_add, _("Usage: /add <jid>\nAdd: Use this command to add the specified JID to your roster. The reverse authorization will automatically be accepted if the remote JID accepts your subscription, leading to a mutual presence subscription."), None)
        self.commands['remove'] = (self.command_remove, _("Usage: /remove [jid]\nRemove: Use this command to remove the specified JID from your roster. This wil unsubscribe you from its presence, cancel its subscription to yours, and remove the item from your roster"), self.completion_remove)
        self.commands['export'] = (self.command_export, _("Usage: /export [/path/to/file]\nExport: Use this command to export your contacts into /path/to/file if specified, or $HOME/poezio_contacts if not."), None)
        self.commands['import'] = (self.command_import, _("Usage: /import [/path/to/file]\nImport: Use this command to import your contacts from /path/to/file if specified, or $HOME/poezio_contacts if not."), None)
        self.resize()

    def resize(self):
        roster_width = self.width//2
        info_width = self.width-roster_width-1
        self.v_separator.resize(self.height-2, 1, 0, roster_width)
        self.tab_win.resize(1, self.width, self.height-2, 0)
        self.information_win.resize(self.height-2-4, info_width, 0, roster_width+1, self.core.information_buffer)
        self.roster_win.resize(self.height-2, roster_width, 0, 0)
        self.contact_info_win.resize(4, info_width, self.height-2-4, roster_width+1)
        self.input.resize(1, self.width, self.height-1, 0)

    def completion(self):
        # Check if we are entering a command (with the '/' key)
        if isinstance(self.input, windows.CommandInput) and\
                not self.input.help_message:
            self.complete_commands(self.input)

    def command_deny(self, args):
        """
        Denies a JID from our roster
        """
        args = args.split()
        if not args:
            item = self.roster_win.selected_row
            if isinstance(item, Contact) and item.get_ask() == 'asked':
                jid = item.get_bare_jid()
            else:
                self.core.information('No subscription to deny')
                return
        else:
            jid = JID(args[0]).bare
        self.core.xmpp.sendPresence(pto=jid, ptype='unsubscribed')
        if self.core.xmpp.update_roster(jid, subscription='remove'):
            roster.remove_contact(jid)

    def command_add(self, args):
        """
        Add the specified JID to the roster, and set automatically
        accept the reverse subscription
        """
        jid = JID(args.strip()).bare
        if not jid:
            self.core.information(_('No JID specified'), 'Error')
            return
        self.core.xmpp.sendPresence(pto=jid, ptype='subscribe')

    def command_remove(self, args):
        """
        Remove the specified JID from the roster. i.e. : unsubscribe
        from its presence, and cancel its subscription to our.
        """
        if args.strip():
            jid = JID(args.strip()).bare
        else:
            item = self.roster_win.selected_row
            if isinstance(item, Contact):
                jid = item.get_bare_jid()
            else:
                self.core.information('No roster item to remove')
                return
        self.core.xmpp.sendPresence(pto=jid, ptype='unsubscribe')
        self.core.xmpp.sendPresence(pto=jid, ptype='unsubscribed')
        self.core.xmpp.del_roster_item(jid=jid)

    def command_import(self, arg):
        """
        Import the contacts
        """
        args = common.shell_split(arg)
        if len(args):
            if args[0].startswith('/'):
                filepath = args[0]
            else:
                filepath = path.join(getenv('HOME'), args[0])
        else:
            filepath = path.join(getenv('HOME'), 'poezio_contacts')
        if not path.isfile(filepath):
            self.core.information('The file %s does not exist' % filepath, 'Error')
            return
        try:
            handle = open(filepath, 'r')
            lines = handle.readlines()
            handle.close()
        except IOError:
            self.core.information('Could not open %s' % filepath, 'Error')
            return
        for jid in lines:
            self.command_add(jid.lstrip('\n'))
        self.core.information('Contacts imported from %s' % filepath, 'Info')


    def command_export(self, arg):
        """
        Export the contacts
        """
        args = common.shell_split(arg)
        if len(args):
            if args[0].startswith('/'):
                filepath = args[0]
            else:
                filepath = path.join(getenv('HOME'), args[0])
        else:
            filepath = path.join(getenv('HOME'), 'poezio_contacts')
        if path.isfile(filepath):
            self.core.information('The file already exists', 'Error')
            return
        elif not path.isdir(path.dirname(filepath)):
            self.core.information('Parent directory not found', 'Error')
            return
        if roster.export(filepath):
            self.core.information('Contacts exported to %s' % filepath, 'Info')
        else:
            self.core.information('Failed to export contacts to %s' % filepath, 'Info')

    def completion_remove(self, the_input):
        """
        From with any JID presence in the roster
        """
        jids = [contact.get_bare_jid() for contact in roster.get_contacts()]
        return the_input.auto_completion(jids, '')

    def completion_deny(self, the_input):
        """
        Complete the first argument from the list of the
        contact with ask=='subscribe'
        """
        jids = [contact.get_bare_jid() for contact in roster.get_contacts()\
             if contact.get_ask() == 'asked']
        return the_input.auto_completion(jids, '')

    def command_accept(self, args):
        """
        Accept a JID from in roster. Authorize it AND subscribe to it
        """
        args = args.split()
        if not args:
            item = self.roster_win.selected_row
            if isinstance(item, Contact) and item.get_ask() == 'asked':
                jid = item.get_bare_jid()
            else:
                self.core.information('No subscription to accept')
                return
        else:
            jid = args[0]
        self.core.xmpp.sendPresence(pto=jid, ptype='subscribed')
        self.core.xmpp.sendPresence(pto=jid, ptype='subscribe')

    def refresh(self):
        if self.need_resize:
            self.resize()
        log.debug('  TAB   Refresh: %s'%self.__class__.__name__)
        self.v_separator.refresh()
        self.roster_win.refresh(roster)
        self.contact_info_win.refresh(self.roster_win.get_selected_row())
        self.information_win.refresh(self.core.informations)
        self.tab_win.refresh()
        self.input.refresh()

    def get_name(self):
        return self.name

    def get_color_state(self):
        return self._color_state

    def set_color_state(self, color):
        self._color_state = color

    def on_input(self, key):
        if key == '^M':
            selected_row = self.roster_win.get_selected_row()
        res = self.input.do_command(key)
        if res:
            return True
        if key == '^M':
            self.core.on_roster_enter_key(selected_row)
            return selected_row
        elif key in self.key_func:
            return self.key_func[key]()

    def toggle_offline_show(self):
        """
        Show or hide offline contacts
        """
        option = 'roster_show_offline'
        if config.get(option, 'false') == 'false':
            config.set_and_save(option, 'true')
        else:
            config.set_and_save(option, 'false')
        return True

    def on_slash(self):
        """
        '/' is pressed, we enter "input mode"
        """
        curses.curs_set(1)
        self.input = windows.CommandInput("", self.reset_help_message, self.execute_slash_command)
        self.input.resize(1, self.width, self.height-1, 0)
        self.input.do_command("/") # we add the slash

    def reset_help_message(self, _=None):
        curses.curs_set(0)
        self.input = self.default_help_message
        self.input.refresh()
        self.core.doupdate()
        return True

    def execute_slash_command(self, txt):
        if txt.startswith('/'):
            self.execute_command(txt)
        return self.reset_help_message()

    def on_lose_focus(self):
        self._color_state = theme.COLOR_TAB_NORMAL

    def on_gain_focus(self):
        self._color_state = theme.COLOR_TAB_CURRENT
        if isinstance(self.input, windows.HelpText):
            curses.curs_set(0)
        else:
            curses.curs_set(1)

    def add_message(self):
        return False

    def move_cursor_down(self):
        self.roster_win.move_cursor_down()
        self.roster_win.refresh(roster)
        self.contact_info_win.refresh(self.roster_win.get_selected_row())
        self.input.refresh()
        self.core.doupdate()

    def move_cursor_up(self):
        self.roster_win.move_cursor_up()
        self.roster_win.refresh(roster)
        self.contact_info_win.refresh(self.roster_win.get_selected_row())
        self.input.refresh()
        self.core.doupdate()

    def move_cursor_to_prev_group(self):
        self.roster_win.move_cursor_up()
        while not isinstance(self.roster_win.get_selected_row(), RosterGroup):
            if not self.roster_win.move_cursor_up():
                break
        self.roster_win.refresh(roster)
        self.contact_info_win.refresh(self.roster_win.get_selected_row())
        self.input.refresh()
        self.core.doupdate()

    def move_cursor_to_next_group(self):
        self.roster_win.move_cursor_down()
        while not isinstance(self.roster_win.get_selected_row(), RosterGroup):
            if not self.roster_win.move_cursor_down():
                break
        self.roster_win.refresh(roster)
        self.contact_info_win.refresh(self.roster_win.get_selected_row())
        self.input.refresh()
        self.core.doupdate()

    def on_scroll_down(self):
        for i in range(self.height-1):
            self.roster_win.move_cursor_down()
        return True

    def on_scroll_up(self):
        for i in range(self.height-1):
            self.roster_win.move_cursor_up()
        return True

    def on_space(self):
        selected_row = self.roster_win.get_selected_row()
        if isinstance(selected_row, RosterGroup) or\
                isinstance(selected_row, Contact):
            selected_row.toggle_folded()
            return True

    def start_search(self):
        """
        Start the search. The input should appear with a short instruction
        in it.
        """
        curses.curs_set(1)
        self.input = windows.CommandInput("[Search]", self.on_search_terminate, self.on_search_terminate, self.set_roster_filter)
        self.input.resize(1, self.width, self.height-1, 0)
        return True

    def start_search_slow(self):
        curses.curs_set(1)
        self.input = windows.CommandInput("[Search]", self.on_search_terminate, self.on_search_terminate, self.set_roster_filter_slow)
        self.input.resize(1, self.width, self.height-1, 0)
        return True

    def set_roster_filter_slow(self, txt):
        roster._contact_filter = (jid_and_name_match_slow, txt)
        self.roster_win.refresh(roster)
        return False

    def set_roster_filter(self, txt):
        roster._contact_filter = (jid_and_name_match, txt)
        self.roster_win.refresh(roster)
        return False

    def on_search_terminate(self, txt):
        curses.curs_set(0)
        roster._contact_filter = None
        self.reset_help_message()
        return False

    def on_close(self):
        return

class ConversationTab(ChatTab):
    """
    The tab containg a normal conversation (not from a MUC)
    """
    message_type = 'chat'
    def __init__(self, jid):
        txt_buff = text_buffer.TextBuffer()
        ChatTab.__init__(self, txt_buff)
        self.color_state = theme.COLOR_TAB_NORMAL
        self._name = jid        # a conversation tab is linked to one specific full jid OR bare jid
        self.text_win = windows.TextWin()
        txt_buff.add_window(self.text_win)
        self.upper_bar = windows.ConversationStatusMessageWin()
        self.info_header = windows.ConversationInfoWin()
        self.tab_win = windows.GlobalInfoBar()
        self.input = windows.MessageInput()
        # keys
        self.key_func['^I'] = self.completion
        # commands
        self.commands['unquery'] = (self.command_unquery, _("Usage: /unquery\nUnquery: close the tab"), None)
        self.commands['part'] = (self.command_unquery, _("Usage: /part\Part: close the tab"), None)
        self.resize()

    def completion(self):
        self.complete_commands(self.input)

    def command_say(self, line):
        msg = self.core.xmpp.make_message(self.get_name())
        msg['type'] = 'chat'
        if line.find('\x19') == -1:
            msg['body'] = line
        else:
            msg['body'] = xhtml.clean_text(line)
            msg['xhtml_im'] = xhtml.poezio_colors_to_html(line)
        if config.get('send_chat_states', 'true') == 'true' and self.remote_wants_chatstates is not False:
            msg['chat_state'] = 'active'
        msg.send()
        self.core.add_message_to_text_buffer(self.get_room(), line, None, self.core.own_nick)
        logger.log_message(JID(self.get_name()).bare, self.core.own_nick, line)
        self.cancel_paused_delay()
        self.text_win.refresh(self._room)
        self.input.refresh()

    def command_unquery(self, arg):
        self.core.close_tab()

    def resize(self):
        if self.core.information_win_size >= self.height-3:
            return
        self.text_win.resize(self.height-4-self.core.information_win_size, self.width, 1, 0)
        self.text_win.rebuild_everything(self._room)
        self.upper_bar.resize(1, self.width, 0, 0)
        self.info_header.resize(1, self.width, self.height-3-self.core.information_win_size, 0)
        self.tab_win.resize(1, self.width, self.height-2, 0)
        self.input.resize(1, self.width, self.height-1, 0)

    def refresh(self):
        if self.need_resize:
            self.resize()
        log.debug('  TAB   Refresh: %s'%self.__class__.__name__)
        self.text_win.refresh(self._room)
        self.upper_bar.refresh(self.get_name(), roster.get_contact_by_jid(self.get_name()))
        self.info_header.refresh(self.get_name(), roster.get_contact_by_jid(self.get_name()), self._room, self.text_win, self.chatstate)
        self.info_win.refresh(self.core.informations)
        self.tab_win.refresh()
        self.input.refresh()

    def refresh_info_header(self):
        self.info_header.refresh(self.get_name(), roster.get_contact_by_jid(self.get_name()), self._room, self.text_win, self.chatstate)
        self.input.refresh()

    def get_color_state(self):
        if self.color_state == theme.COLOR_TAB_NORMAL or\
                self.color_state == theme.COLOR_TAB_CURRENT:
            return self.color_state
        return theme.COLOR_TAB_PRIVATE

    def set_color_state(self, color):
        self.color_state = color

    def get_name(self):
        return self._name

    def on_input(self, key):
        if key in self.key_func:
            self.key_func[key]()
            return False
        empty_before = self.input.get_text() == '' or (self.input.get_text().startswith('/') and not self.input.get_text().startswith('//'))
        self.input.do_command(key)
        empty_after = self.input.get_text() == '' or (self.input.get_text().startswith('/') and not self.input.get_text().startswith('//'))
        self.send_composing_chat_state(empty_before, empty_after)
        return False

    def on_lose_focus(self):
        self.set_color_state(theme.COLOR_TAB_NORMAL)
        self.text_win.remove_line_separator()
        self.text_win.add_line_separator()
        if config.get('send_chat_states', 'true') == 'true' and not self.input.get_text() or not self.input.get_text().startswith('//'):
            self.send_chat_state('inactive')

    def on_gain_focus(self):
        self.set_color_state(theme.COLOR_TAB_CURRENT)
        curses.curs_set(1)
        if config.get('send_chat_states', 'true') == 'true' and not self.input.get_text() or not self.input.get_text().startswith('//'):
            self.send_chat_state('active')

    def on_scroll_up(self):
        self.text_win.scroll_up(self.text_win.height-1)

    def on_scroll_down(self):
        self.text_win.scroll_down(self.text_win.height-1)

    def on_info_win_size_changed(self):
        if self.core.information_win_size >= self.height-3:
            return
        self.text_win.resize(self.height-4-self.core.information_win_size, self.width, 1, 0)
        self.info_header.resize(1, self.width, self.height-3-self.core.information_win_size, 0)

    def get_room(self):
        return self._room

    def get_text_window(self):
        return self.text_win

    def on_close(self):
        Tab.on_close(self)
        if config.get('send_chat_states', 'true') == 'true':
            self.send_chat_state('gone')

class MucListTab(Tab):
    """
    A tab listing rooms from a specific server, displaying various information,
    scrollable, and letting the user join them, etc
    """
    def __init__(self, server):
        Tab.__init__(self)
        self._color_state = theme.COLOR_TAB_NORMAL
        self.name = server
        self.upper_message = windows.Topic()
        self.upper_message.set_message('Chatroom list on server %s (Loading)' % self.name)
        columns = ('node-part', 'name', 'users')
        self.list_header = windows.ColumnHeaderWin(columns)
        self.listview = windows.ListWin(columns)
        self.tab_win = windows.GlobalInfoBar()
        self.default_help_message = windows.HelpText("“j”: join room.")
        self.input = self.default_help_message
        self.key_func["KEY_DOWN"] = self.listview.move_cursor_down
        self.key_func["KEY_UP"] = self.listview.move_cursor_up
        self.key_func['^I'] = self.completion
        self.key_func["/"] = self.on_slash
        self.key_func['j'] = self.join_selected
        self.key_func['J'] = self.join_selected_no_focus
        self.key_func['^M'] = self.join_selected
        self.commands['close'] = (self.close, _("Usage: /close\nClose: Just close this tab"), None)
        self.resize()

    def refresh(self):
        if self.need_resize:
            self.resize()
        log.debug('  TAB   Refresh: %s'%self.__class__.__name__)
        self.upper_message.refresh()
        self.list_header.refresh()
        self.listview.refresh()
        self.tab_win.refresh()
        self.input.refresh()

    def resize(self):
        self.upper_message.resize(1, self.width, 0, 0)
        column_size = {'node-part': (self.width-5)//4,
                       'name': (self.width-5)//4*3,
                       'users': 5}
        self.list_header.resize_columns(column_size)
        self.list_header.resize(1, self.width, 1, 0)
        self.listview.resize_columns(column_size)
        self.listview.resize(self.height-4, self.width, 2, 0)
        self.tab_win.resize(1, self.width, self.height-2, 0)
        self.input.resize(1, self.width, self.height-1, 0)

    def on_slash(self):
        """
        '/' is pressed, activate the input
        """
        curses.curs_set(1)
        self.input = windows.CommandInput("", self.reset_help_message, self.execute_slash_command)
        self.input.resize(1, self.width, self.height-1, 0)
        self.input.do_command("/") # we add the slash

    def close(self, arg=None):
        self.input.on_delete()
        self.core.close_tab(self)

    def join_selected_no_focus(self):
        return

    def set_error(self, msg, code, body):
        """
        If there's an error (retrieving the values etc)
        """
        self._error_message = _('Error: %(code)s - %(msg)s: %(body)s') % {'msg':msg, 'body':body, 'code':code}
        self.upper_message.set_message(self._error_message)
        self.upper_message.refresh()
        curses.doupdate()

    def on_muc_list_item_received(self, iq):
        """
        Callback called when a disco#items result is received
        Used with command_list
        """
        if iq['type'] == 'error':
            self.set_error(iq['error']['type'], iq['error']['code'], iq['error']['text'])
            return
        items = [{'node-part':JID(item[0]).user,
                  'jid': item[0],
                  'name': item[2]} for item in iq['disco_items'].get_items()]
        self.listview.add_lines(items)
        self.upper_message.set_message('Chatroom list on server %s' % self.name)
        self.upper_message.refresh()
        curses.doupdate()

    def join_selected(self):
        row = self.listview.get_selected_row()
        if not row:
            return
        self.core.command_join(row['jid'])

    def reset_help_message(self, _=None):
        curses.curs_set(0)
        self.input = self.default_help_message
        return True

    def execute_slash_command(self, txt):
        self.execute_command(txt)
        return self.reset_help_message()

    def get_name(self):
        return self.name

    def completion(self):
        if isinstance(self.input, windows.CommandInput):
            self.complete_commands(self.input)

    def on_input(self, key):
        res = self.input.do_command(key)
        if res:
            return True
        if key in self.key_func:
            return self.key_func[key]()

    def on_lose_focus(self):
        self._color_state = theme.COLOR_TAB_NORMAL

    def on_gain_focus(self):
        self._color_state = theme.COLOR_TAB_CURRENT
        curses.curs_set(0)

    def get_color_state(self):
        return self._color_state

class SimpleTextTab(Tab):
    """
    A very simple tab, with just a text displaying some
    information or whatever.
    For example used to display tracebacks
    """
    def __init__(self, text):
        Tab.__init__(self)
        self._color_state = theme.COLOR_TAB_NORMAL
        self.text_win = windows.SimpleTextWin(text)
        self.tab_win = windows.GlobalInfoBar()
        self.default_help_message = windows.HelpText("“Ctrl+q”: close")
        self.input = self.default_help_message
        self.key_func['^T'] = self.close
        self.key_func["/"] = self.on_slash
        self.resize()

    def on_slash(self):
        """
        '/' is pressed, activate the input
        """
        curses.curs_set(1)
        self.input = windows.CommandInput("", self.reset_help_message, self.execute_slash_command)
        self.input.resize(1, self.width, self.height-1, 0)
        self.input.do_command("/") # we add the slash

    def on_input(self, key):
        res = self.input.do_command(key)
        if res:
            return True
        if key in self.key_func:
            return self.key_func[key]()

    def close(self):
        self.core.close_tab()

    def resize(self):
        self.text_win.resize(self.height-2, self.width, 0, 0)
        self.tab_win.resize(1, self.width, self.height-2, 0)
        self.input.resize(1, self.width, self.height-1, 0)

    def refresh(self):
        if self.need_resize:
            self.resize()
        log.debug('  TAB   Refresh: %s'%self.__class__.__name__)
        self.text_win.refresh()
        self.tab_win.refresh()
        self.input.refresh()

    def on_lose_focus(self):
        self._color_state = theme.COLOR_TAB_NORMAL

    def on_gain_focus(self):
        self._color_state = theme.COLOR_TAB_CURRENT
        curses.curs_set(0)

    def get_color_state(self):
        return self._color_state

def diffmatch(search, string):
    """
    Use difflib and a loop to check if search_pattern can
    be 'almost' found INSIDE a string.
    'almost' being defined by difflib
    """
    l = len(search)
    ratio = 0.7
    for i in range(len(string) - l + 1):
        if difflib.SequenceMatcher(None, search, string[i:i+l]).ratio() >= ratio:
            return True
    return False

def jid_and_name_match(contact, txt):
    """
    Match jid with text precisely
    """
    if not txt:
        return True
    if txt in JID(contact.get_bare_jid()).user:
        return True
    return False

def jid_and_name_match_slow(contact, txt):
    """
    A function used to know if a contact in the roster should
    be shown in the roster
    """
    if not txt:
        return True             # Everything matches when search is empty
    user = JID(contact.get_bare_jid()).user
    if diffmatch(txt, user):
        return True
    if contact.get_name() and diffmatch(txt, contact.get_name()):
        return True
    return False