File: gtkfont.c

package info (click to toggle)
putty 0.62-9+deb7u3
  • links: PTS, VCS
  • area: main
  • in suites: wheezy
  • size: 9,348 kB
  • sloc: ansic: 79,830; objc: 3,101; perl: 1,600; python: 908; sh: 479; makefile: 153
file content (2580 lines) | stat: -rw-r--r-- 78,282 bytes parent folder | download
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
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
/*
 * Unified font management for GTK.
 * 
 * PuTTY is willing to use both old-style X server-side bitmap
 * fonts _and_ GTK2/Pango client-side fonts. This requires us to
 * do a bit of work to wrap the two wildly different APIs into
 * forms the rest of the code can switch between seamlessly, and
 * also requires a custom font selector capable of handling both
 * types of font.
 */

#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include <gdk/gdkx.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>

#include "putty.h"
#include "gtkfont.h"
#include "tree234.h"

/*
 * Future work:
 * 
 *  - it would be nice to have a display of the current font name,
 *    and in particular whether it's client- or server-side,
 *    during the progress of the font selector.
 * 
 *  - all the GDK font functions used in the x11font subclass are
 *    deprecated, so one day they may go away. When this happens -
 *    or before, if I'm feeling proactive - it oughtn't to be too
 *    difficult in principle to convert the whole thing to use
 *    actual Xlib font calls.
 * 
 *  - it would be nice if we could move the processing of
 *    underline and VT100 double width into this module, so that
 *    instead of using the ghastly pixmap-stretching technique
 *    everywhere we could tell the Pango backend to scale its
 *    fonts to double size properly and at full resolution.
 *    However, this requires me to learn how to make Pango stretch
 *    text to an arbitrary aspect ratio (for double-width only
 *    text, which perversely is harder than DW+DH), and right now
 *    I haven't the energy.
 */

#if !GLIB_CHECK_VERSION(1,3,7)
#define g_ascii_strcasecmp g_strcasecmp
#define g_ascii_strncasecmp g_strncasecmp
#endif

/*
 * Ad-hoc vtable mechanism to allow font structures to be
 * polymorphic.
 * 
 * Any instance of `unifont' used in the vtable functions will
 * actually be the first element of a larger structure containing
 * data specific to the subtype. This is permitted by the ISO C
 * provision that one may safely cast between a pointer to a
 * structure and a pointer to its first element.
 */

#define FONTFLAG_CLIENTSIDE    0x0001
#define FONTFLAG_SERVERSIDE    0x0002
#define FONTFLAG_SERVERALIAS   0x0004
#define FONTFLAG_NONMONOSPACED 0x0008

#define FONTFLAG_SORT_MASK     0x0007 /* used to disambiguate font families */

typedef void (*fontsel_add_entry)(void *ctx, const char *realfontname,
				  const char *family, const char *charset,
				  const char *style, const char *stylekey,
				  int size, int flags,
				  const struct unifont_vtable *fontclass);

struct unifont_vtable {
    /*
     * `Methods' of the `class'.
     */
    unifont *(*create)(GtkWidget *widget, const char *name, int wide, int bold,
		       int shadowoffset, int shadowalways);
    void (*destroy)(unifont *font);
    void (*draw_text)(GdkDrawable *target, GdkGC *gc, unifont *font,
		      int x, int y, const char *string, int len, int wide,
		      int bold, int cellwidth);
    void (*enum_fonts)(GtkWidget *widget,
		       fontsel_add_entry callback, void *callback_ctx);
    char *(*canonify_fontname)(GtkWidget *widget, const char *name, int *size,
			       int *flags, int resolve_aliases);
    char *(*scale_fontname)(GtkWidget *widget, const char *name, int size);

    /*
     * `Static data members' of the `class'.
     */
    const char *prefix;
};

/* ----------------------------------------------------------------------
 * GDK-based X11 font implementation.
 */

static void x11font_draw_text(GdkDrawable *target, GdkGC *gc, unifont *font,
			      int x, int y, const char *string, int len,
			      int wide, int bold, int cellwidth);
static unifont *x11font_create(GtkWidget *widget, const char *name,
			       int wide, int bold,
			       int shadowoffset, int shadowalways);
static void x11font_destroy(unifont *font);
static void x11font_enum_fonts(GtkWidget *widget,
			       fontsel_add_entry callback, void *callback_ctx);
static char *x11font_canonify_fontname(GtkWidget *widget, const char *name,
				       int *size, int *flags,
				       int resolve_aliases);
static char *x11font_scale_fontname(GtkWidget *widget, const char *name,
				    int size);

struct x11font {
    struct unifont u;
    /*
     * Actual font objects. We store a number of these, for
     * automatically guessed bold and wide variants.
     * 
     * The parallel array `allocated' indicates whether we've
     * tried to fetch a subfont already (thus distinguishing NULL
     * because we haven't tried yet from NULL because we tried and
     * failed, so that we don't keep trying and failing
     * subsequently).
     */
    GdkFont *fonts[4];
    int allocated[4];
    /*
     * `sixteen_bit' is true iff the font object is indexed by
     * values larger than a byte. That is, this flag tells us
     * whether we use gdk_draw_text_wc() or gdk_draw_text().
     */
    int sixteen_bit;
    /*
     * `variable' is true iff the font is non-fixed-pitch. This
     * enables some code which takes greater care over character
     * positioning during text drawing.
     */
    int variable;
    /*
     * Data passed in to unifont_create().
     */
    int wide, bold, shadowoffset, shadowalways;
};

static const struct unifont_vtable x11font_vtable = {
    x11font_create,
    x11font_destroy,
    x11font_draw_text,
    x11font_enum_fonts,
    x11font_canonify_fontname,
    x11font_scale_fontname,
    "server",
};

char *x11_guess_derived_font_name(GdkFont *font, int bold, int wide)
{
    XFontStruct *xfs = GDK_FONT_XFONT(font);
    Display *disp = GDK_FONT_XDISPLAY(font);
    Atom fontprop = XInternAtom(disp, "FONT", False);
    unsigned long ret;
    if (XGetFontProperty(xfs, fontprop, &ret)) {
	char *name = XGetAtomName(disp, (Atom)ret);
	if (name && name[0] == '-') {
	    char *strings[13];
	    char *dupname, *extrafree = NULL, *ret;
	    char *p, *q;
	    int nstr;

	    p = q = dupname = dupstr(name); /* skip initial minus */
	    nstr = 0;

	    while (*p && nstr < lenof(strings)) {
		if (*p == '-') {
		    *p = '\0';
		    strings[nstr++] = p+1;
		}
		p++;
	    }

	    if (nstr < lenof(strings))
		return NULL;	       /* XLFD was malformed */

	    if (bold)
		strings[2] = "bold";

	    if (wide) {
		/* 4 is `wideness', which obviously may have changed. */
		/* 5 is additional style, which may be e.g. `ja' or `ko'. */
		strings[4] = strings[5] = "*";
		strings[11] = extrafree = dupprintf("%d", 2*atoi(strings[11]));
	    }

	    ret = dupcat("-", strings[ 0], "-", strings[ 1], "-", strings[ 2],
			 "-", strings[ 3], "-", strings[ 4], "-", strings[ 5],
			 "-", strings[ 6], "-", strings[ 7], "-", strings[ 8],
			 "-", strings[ 9], "-", strings[10], "-", strings[11],
			 "-", strings[12], NULL);
	    sfree(extrafree);
	    sfree(dupname);

	    return ret;
	}
    }
    return NULL;
}

static int x11_font_width(GdkFont *font, int sixteen_bit)
{
    if (sixteen_bit) {
	XChar2b space;
	space.byte1 = 0;
	space.byte2 = '0';
	return gdk_text_width(font, (const gchar *)&space, 2);
    } else {
	return gdk_char_width(font, '0');
    }
}

static unifont *x11font_create(GtkWidget *widget, const char *name,
			       int wide, int bold,
			       int shadowoffset, int shadowalways)
{
    struct x11font *xfont;
    GdkFont *font;
    XFontStruct *xfs;
    Display *disp;
    Atom charset_registry, charset_encoding, spacing;
    unsigned long registry_ret, encoding_ret, spacing_ret;
    int pubcs, realcs, sixteen_bit, variable;
    int i;

    font = gdk_font_load(name);
    if (!font)
	return NULL;

    xfs = GDK_FONT_XFONT(font);
    disp = GDK_FONT_XDISPLAY(font);

    charset_registry = XInternAtom(disp, "CHARSET_REGISTRY", False);
    charset_encoding = XInternAtom(disp, "CHARSET_ENCODING", False);

    pubcs = realcs = CS_NONE;
    sixteen_bit = FALSE;
    variable = TRUE;

    if (XGetFontProperty(xfs, charset_registry, &registry_ret) &&
	XGetFontProperty(xfs, charset_encoding, &encoding_ret)) {
	char *reg, *enc;
	reg = XGetAtomName(disp, (Atom)registry_ret);
	enc = XGetAtomName(disp, (Atom)encoding_ret);
	if (reg && enc) {
	    char *encoding = dupcat(reg, "-", enc, NULL);
	    pubcs = realcs = charset_from_xenc(encoding);

	    /*
	     * iso10646-1 is the only wide font encoding we
	     * support. In this case, we expect clients to give us
	     * UTF-8, which this module must internally convert
	     * into 16-bit Unicode.
	     */
	    if (!strcasecmp(encoding, "iso10646-1")) {
		sixteen_bit = TRUE;
		pubcs = realcs = CS_UTF8;
	    }

	    /*
	     * Hack for X line-drawing characters: if the primary
	     * font is encoded as ISO-8859-1, and has valid glyphs
	     * in the first 32 char positions, it is assumed that
	     * those glyphs are the VT100 line-drawing character
	     * set.
	     * 
	     * Actually, we'll hack even harder by only checking
	     * position 0x19 (vertical line, VT100 linedrawing
	     * `x'). Then we can check it easily by seeing if the
	     * ascent and descent differ.
	     */
	    if (pubcs == CS_ISO8859_1) {
		int lb, rb, wid, asc, desc;
		gchar text[2];

		text[1] = '\0';
		text[0] = '\x12';
		gdk_string_extents(font, text, &lb, &rb, &wid, &asc, &desc);
		if (asc != desc)
		    realcs = CS_ISO8859_1_X11;
	    }

	    sfree(encoding);
	}
    }

    spacing = XInternAtom(disp, "SPACING", False);
    if (XGetFontProperty(xfs, spacing, &spacing_ret)) {
	char *spc;
	spc = XGetAtomName(disp, (Atom)spacing_ret);

	if (spc && strchr("CcMm", spc[0]))
	    variable = FALSE;
    }

    xfont = snew(struct x11font);
    xfont->u.vt = &x11font_vtable;
    xfont->u.width = x11_font_width(font, sixteen_bit);
    xfont->u.ascent = font->ascent;
    xfont->u.descent = font->descent;
    xfont->u.height = xfont->u.ascent + xfont->u.descent;
    xfont->u.public_charset = pubcs;
    xfont->u.real_charset = realcs;
    xfont->fonts[0] = font;
    xfont->allocated[0] = TRUE;
    xfont->sixteen_bit = sixteen_bit;
    xfont->variable = variable;
    xfont->wide = wide;
    xfont->bold = bold;
    xfont->shadowoffset = shadowoffset;
    xfont->shadowalways = shadowalways;

    for (i = 1; i < lenof(xfont->fonts); i++) {
	xfont->fonts[i] = NULL;
	xfont->allocated[i] = FALSE;
    }

    return (unifont *)xfont;
}

static void x11font_destroy(unifont *font)
{
    struct x11font *xfont = (struct x11font *)font;
    int i;

    for (i = 0; i < lenof(xfont->fonts); i++)
	if (xfont->fonts[i])
	    gdk_font_unref(xfont->fonts[i]);
    sfree(font);
}

static void x11_alloc_subfont(struct x11font *xfont, int sfid)
{
    char *derived_name = x11_guess_derived_font_name
	(xfont->fonts[0], sfid & 1, !!(sfid & 2));
    xfont->fonts[sfid] = gdk_font_load(derived_name);   /* may be NULL */
    xfont->allocated[sfid] = TRUE;
    sfree(derived_name);
}

static void x11font_really_draw_text(GdkDrawable *target, GdkFont *font,
				     GdkGC *gc, int x, int y,
				     const gchar *string, int clen, int nchars,
				     int shadowbold, int shadowoffset,
				     int fontvariable, int cellwidth)
{
    int step = clen * nchars, nsteps = 1, centre = FALSE;

    if (fontvariable) {
	/*
	 * In a variable-pitch font, we draw one character at a
	 * time, and centre it in the character cell.
	 */
	step = clen;
	nsteps = nchars;
	centre = TRUE;
    }

    while (nsteps-- > 0) {
	int X = x;
	if (centre)
	    X += (cellwidth - gdk_text_width(font, string, step)) / 2;

	gdk_draw_text(target, font, gc, X, y, string, step);
	if (shadowbold)
	    gdk_draw_text(target, font, gc, X + shadowoffset, y, string, step);

	x += cellwidth;
	string += step;
    }
}

static void x11font_draw_text(GdkDrawable *target, GdkGC *gc, unifont *font,
			      int x, int y, const char *string, int len,
			      int wide, int bold, int cellwidth)
{
    struct x11font *xfont = (struct x11font *)font;
    int sfid;
    int shadowbold = FALSE;
    int mult = (wide ? 2 : 1);

    wide -= xfont->wide;
    bold -= xfont->bold;

    /*
     * Decide which subfont we're using, and whether we have to
     * use shadow bold.
     */
    if (xfont->shadowalways && bold) {
	shadowbold = TRUE;
	bold = 0;
    }
    sfid = 2 * wide + bold;
    if (!xfont->allocated[sfid])
	x11_alloc_subfont(xfont, sfid);
    if (bold && !xfont->fonts[sfid]) {
	bold = 0;
	shadowbold = TRUE;
	sfid = 2 * wide + bold;
	if (!xfont->allocated[sfid])
	    x11_alloc_subfont(xfont, sfid);
    }

    if (!xfont->fonts[sfid])
	return;			       /* we've tried our best, but no luck */

    if (xfont->sixteen_bit) {
	/*
	 * This X font has 16-bit character indices, which means
	 * we expect our string to have been passed in UTF-8.
	 */
	XChar2b *xcs;
	wchar_t *wcs;
	int nchars, maxchars, i;

	/*
	 * Convert the input string to wide-character Unicode.
	 */
	maxchars = 0;
	for (i = 0; i < len; i++)
	    if ((unsigned char)string[i] <= 0x7F ||
		(unsigned char)string[i] >= 0xC0)
		maxchars++;
	wcs = snewn(maxchars+1, wchar_t);
	nchars = charset_to_unicode((char **)&string, &len, wcs, maxchars,
				    CS_UTF8, NULL, NULL, 0);
	assert(nchars <= maxchars);
	wcs[nchars] = L'\0';

	xcs = snewn(nchars, XChar2b);
	for (i = 0; i < nchars; i++) {
	    xcs[i].byte1 = wcs[i] >> 8;
	    xcs[i].byte2 = wcs[i];
	}

	x11font_really_draw_text(target, xfont->fonts[sfid], gc, x, y,
				 (gchar *)xcs, 2, nchars,
				 shadowbold, xfont->shadowoffset,
 				 xfont->variable, cellwidth * mult);
	sfree(xcs);
	sfree(wcs);
    } else {
	x11font_really_draw_text(target, xfont->fonts[sfid], gc, x, y,
				 string, 1, len,
				 shadowbold, xfont->shadowoffset,
				 xfont->variable, cellwidth * mult);
    }
}

static void x11font_enum_fonts(GtkWidget *widget,
			       fontsel_add_entry callback, void *callback_ctx)
{
    char **fontnames;
    char *tmp = NULL;
    int nnames, i, max, tmpsize;

    max = 32768;
    while (1) {
	fontnames = XListFonts(GDK_DISPLAY(), "*", max, &nnames);
	if (nnames >= max) {
	    XFreeFontNames(fontnames);
	    max *= 2;
	} else
	    break;
    }

    tmpsize = 0;

    for (i = 0; i < nnames; i++) {
	if (fontnames[i][0] == '-') {
	    /*
	     * Dismember an XLFD and convert it into the format
	     * we'll be using in the font selector.
	     */
	    char *components[14];
	    char *p, *font, *style, *stylekey, *charset;
	    int j, weightkey, slantkey, setwidthkey;
	    int thistmpsize, fontsize, flags;

	    thistmpsize = 4 * strlen(fontnames[i]) + 256;
	    if (tmpsize < thistmpsize) {
		tmpsize = thistmpsize;
		tmp = sresize(tmp, tmpsize, char);
	    }
	    strcpy(tmp, fontnames[i]);

	    p = tmp;
	    for (j = 0; j < 14; j++) {
		if (*p)
		    *p++ = '\0';
		components[j] = p;
		while (*p && *p != '-')
		    p++;
	    }
	    *p++ = '\0';

	    /*
	     * Font name is made up of fields 0 and 1, in reverse
	     * order with parentheses. (This is what the GTK 1.2 X
	     * font selector does, and it seems to come out
	     * looking reasonably sensible.)
	     */
	    font = p;
	    p += 1 + sprintf(p, "%s (%s)", components[1], components[0]);

	    /*
	     * Charset is made up of fields 12 and 13.
	     */
	    charset = p;
	    p += 1 + sprintf(p, "%s-%s", components[12], components[13]);

	    /*
	     * Style is a mixture of quite a lot of the fields,
	     * with some strange formatting.
	     */
	    style = p;
	    p += sprintf(p, "%s", components[2][0] ? components[2] :
			 "regular");
	    if (!g_ascii_strcasecmp(components[3], "i"))
		p += sprintf(p, " italic");
	    else if (!g_ascii_strcasecmp(components[3], "o"))
		p += sprintf(p, " oblique");
	    else if (!g_ascii_strcasecmp(components[3], "ri"))
		p += sprintf(p, " reverse italic");
	    else if (!g_ascii_strcasecmp(components[3], "ro"))
		p += sprintf(p, " reverse oblique");
	    else if (!g_ascii_strcasecmp(components[3], "ot"))
		p += sprintf(p, " other-slant");
	    if (components[4][0] && g_ascii_strcasecmp(components[4], "normal"))
		p += sprintf(p, " %s", components[4]);
	    if (!g_ascii_strcasecmp(components[10], "m"))
		p += sprintf(p, " [M]");
	    if (!g_ascii_strcasecmp(components[10], "c"))
		p += sprintf(p, " [C]");
	    if (components[5][0])
		p += sprintf(p, " %s", components[5]);

	    /*
	     * Style key is the same stuff as above, but with a
	     * couple of transformations done on it to make it
	     * sort more sensibly.
	     */
	    p++;
	    stylekey = p;
	    if (!g_ascii_strcasecmp(components[2], "medium") ||
		!g_ascii_strcasecmp(components[2], "regular") ||
		!g_ascii_strcasecmp(components[2], "normal") ||
		!g_ascii_strcasecmp(components[2], "book"))
		weightkey = 0;
	    else if (!g_ascii_strncasecmp(components[2], "demi", 4) ||
		     !g_ascii_strncasecmp(components[2], "semi", 4))
		weightkey = 1;
	    else
		weightkey = 2;
	    if (!g_ascii_strcasecmp(components[3], "r"))
		slantkey = 0;
	    else if (!g_ascii_strncasecmp(components[3], "r", 1))
		slantkey = 2;
	    else
		slantkey = 1;
	    if (!g_ascii_strcasecmp(components[4], "normal"))
		setwidthkey = 0;
	    else
		setwidthkey = 1;

	    p += sprintf(p, "%04d%04d%s%04d%04d%s%04d%04d%s%04d%s%04d%s",
			 weightkey,
			 (int)strlen(components[2]), components[2],
			 slantkey,
			 (int)strlen(components[3]), components[3],
			 setwidthkey,
			 (int)strlen(components[4]), components[4],
			 (int)strlen(components[10]), components[10],
			 (int)strlen(components[5]), components[5]);

	    assert(p - tmp < thistmpsize);

	    /*
	     * Size is in pixels, for our application, so we
	     * derive it directly from the pixel size field,
	     * number 6.
	     */
	    fontsize = atoi(components[6]);

	    /*
	     * Flags: we need to know whether this is a monospaced
	     * font, which we do by examining the spacing field
	     * again.
	     */
	    flags = FONTFLAG_SERVERSIDE;
	    if (!strchr("CcMm", components[10][0]))
		flags |= FONTFLAG_NONMONOSPACED;

	    /*
	     * Not sure why, but sometimes the X server will
	     * deliver dummy font types in which fontsize comes
	     * out as zero. Filter those out.
	     */
	    if (fontsize)
		callback(callback_ctx, fontnames[i], font, charset,
			 style, stylekey, fontsize, flags, &x11font_vtable);
	} else {
	    /*
	     * This isn't an XLFD, so it must be an alias.
	     * Transmit it with mostly null data.
	     * 
	     * It would be nice to work out if it's monospaced
	     * here, but at the moment I can't see that being
	     * anything but computationally hideous. Ah well.
	     */
	    callback(callback_ctx, fontnames[i], fontnames[i], NULL,
		     NULL, NULL, 0, FONTFLAG_SERVERALIAS, &x11font_vtable);
	}
    }
    XFreeFontNames(fontnames);
}

static char *x11font_canonify_fontname(GtkWidget *widget, const char *name,
				       int *size, int *flags,
				       int resolve_aliases)
{
    /*
     * When given an X11 font name to try to make sense of for a
     * font selector, we must attempt to load it (to see if it
     * exists), and then canonify it by extracting its FONT
     * property, which should give its full XLFD even if what we
     * originally had was a wildcard.
     * 
     * However, we must carefully avoid canonifying font
     * _aliases_, unless specifically asked to, because the font
     * selector treats them as worthwhile in their own right.
     */
    GdkFont *font = gdk_font_load(name);
    XFontStruct *xfs;
    Display *disp;
    Atom fontprop, fontprop2;
    unsigned long ret;

    if (!font)
	return NULL;		       /* didn't make sense to us, sorry */

    gdk_font_ref(font);

    xfs = GDK_FONT_XFONT(font);
    disp = GDK_FONT_XDISPLAY(font);
    fontprop = XInternAtom(disp, "FONT", False);

    if (XGetFontProperty(xfs, fontprop, &ret)) {
	char *newname = XGetAtomName(disp, (Atom)ret);
	if (newname) {
	    unsigned long fsize = 12;

	    fontprop2 = XInternAtom(disp, "PIXEL_SIZE", False);
	    if (XGetFontProperty(xfs, fontprop2, &fsize) && fsize > 0) {
		*size = fsize;
		gdk_font_unref(font);
		if (flags) {
		    if (name[0] == '-' || resolve_aliases)
			*flags = FONTFLAG_SERVERSIDE;
		    else
			*flags = FONTFLAG_SERVERALIAS;
		}
		return dupstr(name[0] == '-' || resolve_aliases ?
			      newname : name);
	    }
	}
    }

    gdk_font_unref(font);
    return NULL;		       /* something went wrong */
}

static char *x11font_scale_fontname(GtkWidget *widget, const char *name,
				    int size)
{
    return NULL;		       /* shan't */
}

#if GTK_CHECK_VERSION(2,0,0)

/* ----------------------------------------------------------------------
 * Pango font implementation (for GTK 2 only).
 */

#if defined PANGO_PRE_1POINT4 && !defined PANGO_PRE_1POINT6
#define PANGO_PRE_1POINT6	       /* make life easier for pre-1.4 folk */
#endif

static void pangofont_draw_text(GdkDrawable *target, GdkGC *gc, unifont *font,
				int x, int y, const char *string, int len,
				int wide, int bold, int cellwidth);
static unifont *pangofont_create(GtkWidget *widget, const char *name,
				 int wide, int bold,
				 int shadowoffset, int shadowalways);
static void pangofont_destroy(unifont *font);
static void pangofont_enum_fonts(GtkWidget *widget, fontsel_add_entry callback,
				 void *callback_ctx);
static char *pangofont_canonify_fontname(GtkWidget *widget, const char *name,
					 int *size, int *flags,
					 int resolve_aliases);
static char *pangofont_scale_fontname(GtkWidget *widget, const char *name,
				      int size);

struct pangofont {
    struct unifont u;
    /*
     * Pango objects.
     */
    PangoFontDescription *desc;
    PangoFontset *fset;
    /*
     * The containing widget.
     */
    GtkWidget *widget;
    /*
     * Data passed in to unifont_create().
     */
    int bold, shadowoffset, shadowalways;
};

static const struct unifont_vtable pangofont_vtable = {
    pangofont_create,
    pangofont_destroy,
    pangofont_draw_text,
    pangofont_enum_fonts,
    pangofont_canonify_fontname,
    pangofont_scale_fontname,
    "client",
};

/*
 * This function is used to rigorously validate a
 * PangoFontDescription. Later versions of Pango have a nasty
 * habit of accepting _any_ old string as input to
 * pango_font_description_from_string and returning a font
 * description which can actually be used to display text, even if
 * they have to do it by falling back to their most default font.
 * This is doubtless helpful in some situations, but not here,
 * because we need to know if a Pango font string actually _makes
 * sense_ in order to fall back to treating it as an X font name
 * if it doesn't. So we check that the font family is actually one
 * supported by Pango.
 */
static int pangofont_check_desc_makes_sense(PangoContext *ctx,
					    PangoFontDescription *desc)
{
#ifndef PANGO_PRE_1POINT6
    PangoFontMap *map;
#endif
    PangoFontFamily **families;
    int i, nfamilies, matched;

    /*
     * Ask Pango for a list of font families, and iterate through
     * them to see if one of them matches the family in the
     * PangoFontDescription.
     */
#ifndef PANGO_PRE_1POINT6
    map = pango_context_get_font_map(ctx);
    if (!map)
	return FALSE;
    pango_font_map_list_families(map, &families, &nfamilies);
#else
    pango_context_list_families(ctx, &families, &nfamilies);
#endif

    matched = FALSE;
    for (i = 0; i < nfamilies; i++) {
	if (!g_ascii_strcasecmp(pango_font_family_get_name(families[i]),
				pango_font_description_get_family(desc))) {
	    matched = TRUE;
	    break;
	}
    }
    g_free(families);

    return matched;
}

static unifont *pangofont_create(GtkWidget *widget, const char *name,
				 int wide, int bold,
				 int shadowoffset, int shadowalways)
{
    struct pangofont *pfont;
    PangoContext *ctx;
#ifndef PANGO_PRE_1POINT6
    PangoFontMap *map;
#endif
    PangoFontDescription *desc;
    PangoFontset *fset;
    PangoFontMetrics *metrics;

    desc = pango_font_description_from_string(name);
    if (!desc)
	return NULL;
    ctx = gtk_widget_get_pango_context(widget);
    if (!ctx) {
	pango_font_description_free(desc);
	return NULL;
    }
    if (!pangofont_check_desc_makes_sense(ctx, desc)) {
	pango_font_description_free(desc);
	return NULL;
    }
#ifndef PANGO_PRE_1POINT6
    map = pango_context_get_font_map(ctx);
    if (!map) {
	pango_font_description_free(desc);
	return NULL;
    }
    fset = pango_font_map_load_fontset(map, ctx, desc,
				       pango_context_get_language(ctx));
#else
    fset = pango_context_load_fontset(ctx, desc,
                                      pango_context_get_language(ctx));
#endif
    if (!fset) {
	pango_font_description_free(desc);
	return NULL;
    }
    metrics = pango_fontset_get_metrics(fset);
    if (!metrics ||
	pango_font_metrics_get_approximate_digit_width(metrics) == 0) {
	pango_font_description_free(desc);
	g_object_unref(fset);
	return NULL;
    }

    pfont = snew(struct pangofont);
    pfont->u.vt = &pangofont_vtable;
    pfont->u.width =
	PANGO_PIXELS(pango_font_metrics_get_approximate_digit_width(metrics));
    pfont->u.ascent = PANGO_PIXELS(pango_font_metrics_get_ascent(metrics));
    pfont->u.descent = PANGO_PIXELS(pango_font_metrics_get_descent(metrics));
    pfont->u.height = pfont->u.ascent + pfont->u.descent;
    /* The Pango API is hardwired to UTF-8 */
    pfont->u.public_charset = CS_UTF8;
    pfont->u.real_charset = CS_UTF8;
    pfont->desc = desc;
    pfont->fset = fset;
    pfont->widget = widget;
    pfont->bold = bold;
    pfont->shadowoffset = shadowoffset;
    pfont->shadowalways = shadowalways;

    pango_font_metrics_unref(metrics);

    return (unifont *)pfont;
}

static void pangofont_destroy(unifont *font)
{
    struct pangofont *pfont = (struct pangofont *)font;
    pango_font_description_free(pfont->desc);
    g_object_unref(pfont->fset);
    sfree(font);
}

static void pangofont_draw_text(GdkDrawable *target, GdkGC *gc, unifont *font,
				int x, int y, const char *string, int len,
				int wide, int bold, int cellwidth)
{
    struct pangofont *pfont = (struct pangofont *)font;
    PangoLayout *layout;
    PangoRectangle rect;
    int shadowbold = FALSE;

    if (wide)
	cellwidth *= 2;

    y -= pfont->u.ascent;

    layout = pango_layout_new(gtk_widget_get_pango_context(pfont->widget));
    pango_layout_set_font_description(layout, pfont->desc);
    if (bold > pfont->bold) {
	if (pfont->shadowalways)
	    shadowbold = TRUE;
	else {
	    PangoFontDescription *desc2 =
		pango_font_description_copy_static(pfont->desc);
	    pango_font_description_set_weight(desc2, PANGO_WEIGHT_BOLD);
	    pango_layout_set_font_description(layout, desc2);
	}
    }

    while (len > 0) {
	int clen, n;

	/*
	 * We want to display every character from this string in
	 * the centre of its own character cell. In the worst case,
	 * this requires a separate text-drawing call for each
	 * character; but in the common case where the font is
	 * properly fixed-width, we can draw many characters in one
	 * go which is much faster.
	 *
	 * This still isn't really ideal. If you look at what
	 * happens in the X protocol as a result of all of this, you
	 * find - naturally enough - that each call to
	 * gdk_draw_layout() generates a separate set of X RENDER
	 * operations involving creating a picture, setting a clip
	 * rectangle, doing some drawing and undoing the whole lot.
	 * In an ideal world, we should _always_ be able to turn the
	 * contents of this loop into a single RenderCompositeGlyphs
	 * operation which internally specifies inter-character
	 * deltas to get the spacing right, which would give us full
	 * speed _even_ in the worst case of a non-fixed-width font.
	 * However, Pango's architecture and documentation are so
	 * unhelpful that I have no idea how if at all to persuade
	 * them to do that.
	 */

	/*
	 * Start by extracting a single UTF-8 character from the
	 * string.
	 */
	clen = 1;
	while (clen < len &&
	       (unsigned char)string[clen] >= 0x80 &&
	       (unsigned char)string[clen] < 0xC0)
	    clen++;
	n = 1;

	/*
	 * See if that character has the width we expect.
	 */
	pango_layout_set_text(layout, string, clen);
	pango_layout_get_pixel_extents(layout, NULL, &rect);

	if (rect.width == cellwidth) {
	    /*
	     * Try extracting more characters, for as long as they
	     * stay well-behaved.
	     */
	    while (clen < len) {
		int oldclen = clen;
		clen++;		       /* skip UTF-8 introducer byte */
		while (clen < len &&
		       (unsigned char)string[clen] >= 0x80 &&
		       (unsigned char)string[clen] < 0xC0)
		    clen++;
		n++;
		pango_layout_set_text(layout, string, clen);
		pango_layout_get_pixel_extents(layout, NULL, &rect);
		if (rect.width != n * cellwidth) {
		    clen = oldclen;
		    n--;
		    break;
		}
	    }
	}

	pango_layout_set_text(layout, string, clen);
	pango_layout_get_pixel_extents(layout, NULL, &rect);
	gdk_draw_layout(target, gc, x + (n*cellwidth - rect.width)/2,
			y + (pfont->u.height - rect.height)/2, layout);
	if (shadowbold)
	    gdk_draw_layout(target, gc, x + (n*cellwidth - rect.width)/2 + pfont->shadowoffset,
			    y + (pfont->u.height - rect.height)/2, layout);

	len -= clen;
	string += clen;
	x += n * cellwidth;
    }

    g_object_unref(layout);
}

/*
 * Dummy size value to be used when converting a
 * PangoFontDescription of a scalable font to a string for
 * internal use.
 */
#define PANGO_DUMMY_SIZE 12

static void pangofont_enum_fonts(GtkWidget *widget, fontsel_add_entry callback,
				 void *callback_ctx)
{
    PangoContext *ctx;
#ifndef PANGO_PRE_1POINT6
    PangoFontMap *map;
#endif
    PangoFontFamily **families;
    int i, nfamilies;

    ctx = gtk_widget_get_pango_context(widget);
    if (!ctx)
	return;

    /*
     * Ask Pango for a list of font families, and iterate through
     * them.
     */
#ifndef PANGO_PRE_1POINT6
    map = pango_context_get_font_map(ctx);
    if (!map)
	return;
    pango_font_map_list_families(map, &families, &nfamilies);
#else
    pango_context_list_families(ctx, &families, &nfamilies);
#endif
    for (i = 0; i < nfamilies; i++) {
	PangoFontFamily *family = families[i];
	const char *familyname;
	int flags;
	PangoFontFace **faces;
	int j, nfaces;

	/*
	 * Set up our flags for this font family, and get the name
	 * string.
	 */
	flags = FONTFLAG_CLIENTSIDE;
#ifndef PANGO_PRE_1POINT4
        /*
         * In very early versions of Pango, we can't tell
         * monospaced fonts from non-monospaced.
         */
	if (!pango_font_family_is_monospace(family))
	    flags |= FONTFLAG_NONMONOSPACED;
#endif
	familyname = pango_font_family_get_name(family);

	/*
	 * Go through the available font faces in this family.
	 */
	pango_font_family_list_faces(family, &faces, &nfaces);
	for (j = 0; j < nfaces; j++) {
	    PangoFontFace *face = faces[j];
	    PangoFontDescription *desc;
	    const char *facename;
	    int *sizes;
	    int k, nsizes, dummysize;

	    /*
	     * Get the face name string.
	     */
	    facename = pango_font_face_get_face_name(face);

	    /*
	     * Set up a font description with what we've got so
	     * far. We'll fill in the size field manually and then
	     * call pango_font_description_to_string() to give the
	     * full real name of the specific font.
	     */
	    desc = pango_font_face_describe(face);

	    /*
	     * See if this font has a list of specific sizes.
	     */
#ifndef PANGO_PRE_1POINT4
	    pango_font_face_list_sizes(face, &sizes, &nsizes);
#else
            /*
             * In early versions of Pango, that call wasn't
             * supported; we just have to assume everything is
             * scalable.
             */
            sizes = NULL;
#endif
	    if (!sizes) {
		/*
		 * Write a single entry with a dummy size.
		 */
		dummysize = PANGO_DUMMY_SIZE * PANGO_SCALE;
		sizes = &dummysize;
		nsizes = 1;
	    }

	    /*
	     * If so, go through them one by one.
	     */
	    for (k = 0; k < nsizes; k++) {
		char *fullname;
		char stylekey[128];

		pango_font_description_set_size(desc, sizes[k]);

		fullname = pango_font_description_to_string(desc);

		/*
		 * Construct the sorting key for font styles.
		 */
		{
		    char *p = stylekey;
		    int n;

		    n = pango_font_description_get_weight(desc);
		    /* Weight: normal, then lighter, then bolder */
		    if (n <= PANGO_WEIGHT_NORMAL)
			n = PANGO_WEIGHT_NORMAL - n;
		    p += sprintf(p, "%4d", n);

		    n = pango_font_description_get_style(desc);
		    p += sprintf(p, " %2d", n);

		    n = pango_font_description_get_stretch(desc);
		    /* Stretch: closer to normal sorts earlier */
		    n = 2 * abs(PANGO_STRETCH_NORMAL - n) +
			(n < PANGO_STRETCH_NORMAL);
		    p += sprintf(p, " %2d", n);

		    n = pango_font_description_get_variant(desc);
		    p += sprintf(p, " %2d", n);
		    
		}

		/*
		 * Got everything. Hand off to the callback.
		 * (The charset string is NULL, because only
		 * server-side X fonts use it.)
		 */
		callback(callback_ctx, fullname, familyname, NULL, facename,
			 stylekey,
			 (sizes == &dummysize ? 0 : PANGO_PIXELS(sizes[k])),
			 flags, &pangofont_vtable);

		g_free(fullname);
	    }
	    if (sizes != &dummysize)
		g_free(sizes);

	    pango_font_description_free(desc);
	}
	g_free(faces);
    }
    g_free(families);
}

static char *pangofont_canonify_fontname(GtkWidget *widget, const char *name,
					 int *size, int *flags,
					 int resolve_aliases)
{
    /*
     * When given a Pango font name to try to make sense of for a
     * font selector, we must normalise it to PANGO_DUMMY_SIZE and
     * extract its original size (in pixels) into the `size' field.
     */
    PangoContext *ctx;
#ifndef PANGO_PRE_1POINT6
    PangoFontMap *map;
#endif
    PangoFontDescription *desc;
    PangoFontset *fset;
    PangoFontMetrics *metrics;
    char *newname, *retname;

    desc = pango_font_description_from_string(name);
    if (!desc)
	return NULL;
    ctx = gtk_widget_get_pango_context(widget);
    if (!ctx) {
	pango_font_description_free(desc);
	return NULL;
    }
    if (!pangofont_check_desc_makes_sense(ctx, desc)) {
	pango_font_description_free(desc);
	return NULL;
    }
#ifndef PANGO_PRE_1POINT6
    map = pango_context_get_font_map(ctx);
    if (!map) {
	pango_font_description_free(desc);
	return NULL;
    }
    fset = pango_font_map_load_fontset(map, ctx, desc,
				       pango_context_get_language(ctx));
#else
    fset = pango_context_load_fontset(ctx, desc,
                                      pango_context_get_language(ctx));
#endif
    if (!fset) {
	pango_font_description_free(desc);
	return NULL;
    }
    metrics = pango_fontset_get_metrics(fset);
    if (!metrics ||
	pango_font_metrics_get_approximate_digit_width(metrics) == 0) {
	pango_font_description_free(desc);
	g_object_unref(fset);
	return NULL;
    }

    *size = PANGO_PIXELS(pango_font_description_get_size(desc));
    *flags = FONTFLAG_CLIENTSIDE;
    pango_font_description_set_size(desc, PANGO_DUMMY_SIZE * PANGO_SCALE);
    newname = pango_font_description_to_string(desc);
    retname = dupstr(newname);
    g_free(newname);

    pango_font_metrics_unref(metrics);
    pango_font_description_free(desc);
    g_object_unref(fset);

    return retname;
}

static char *pangofont_scale_fontname(GtkWidget *widget, const char *name,
				      int size)
{
    PangoFontDescription *desc;
    char *newname, *retname;

    desc = pango_font_description_from_string(name);
    if (!desc)
	return NULL;
    pango_font_description_set_size(desc, size * PANGO_SCALE);
    newname = pango_font_description_to_string(desc);
    retname = dupstr(newname);
    g_free(newname);
    pango_font_description_free(desc);

    return retname;
}

#endif /* GTK_CHECK_VERSION(2,0,0) */

/* ----------------------------------------------------------------------
 * Outermost functions which do the vtable dispatch.
 */

/*
 * Complete list of font-type subclasses. Listed in preference
 * order for unifont_create(). (That is, in the extremely unlikely
 * event that the same font name is valid as both a Pango and an
 * X11 font, it will be interpreted as the former in the absence
 * of an explicit type-disambiguating prefix.)
 */
static const struct unifont_vtable *unifont_types[] = {
#if GTK_CHECK_VERSION(2,0,0)
    &pangofont_vtable,
#endif
    &x11font_vtable,
};

/*
 * Function which takes a font name and processes the optional
 * scheme prefix. Returns the tail of the font name suitable for
 * passing to individual font scheme functions, and also provides
 * a subrange of the unifont_types[] array above.
 * 
 * The return values `start' and `end' denote a half-open interval
 * in unifont_types[]; that is, the correct way to iterate over
 * them is
 * 
 *   for (i = start; i < end; i++) {...}
 */
static const char *unifont_do_prefix(const char *name, int *start, int *end)
{
    int colonpos = strcspn(name, ":");
    int i;

    if (name[colonpos]) {
	/*
	 * There's a colon prefix on the font name. Use it to work
	 * out which subclass to use.
	 */
	for (i = 0; i < lenof(unifont_types); i++) {
	    if (strlen(unifont_types[i]->prefix) == colonpos &&
		!strncmp(unifont_types[i]->prefix, name, colonpos)) {
		*start = i;
		*end = i+1;
		return name + colonpos + 1;
	    }
	}
	/*
	 * None matched, so return an empty scheme list to prevent
	 * any scheme from being called at all.
	 */
	*start = *end = 0;
	return name + colonpos + 1;
    } else {
	/*
	 * No colon prefix, so just use all the subclasses.
	 */
	*start = 0;
	*end = lenof(unifont_types);
	return name;
    }
}

unifont *unifont_create(GtkWidget *widget, const char *name, int wide,
			int bold, int shadowoffset, int shadowalways)
{
    int i, start, end;

    name = unifont_do_prefix(name, &start, &end);

    for (i = start; i < end; i++) {
	unifont *ret = unifont_types[i]->create(widget, name, wide, bold,
						shadowoffset, shadowalways);
	if (ret)
	    return ret;
    }
    return NULL;		       /* font not found in any scheme */
}

void unifont_destroy(unifont *font)
{
    font->vt->destroy(font);
}

void unifont_draw_text(GdkDrawable *target, GdkGC *gc, unifont *font,
		       int x, int y, const char *string, int len,
		       int wide, int bold, int cellwidth)
{
    font->vt->draw_text(target, gc, font, x, y, string, len,
			wide, bold, cellwidth);
}

#if GTK_CHECK_VERSION(2,0,0)

/* ----------------------------------------------------------------------
 * Implementation of a unified font selector. Used on GTK 2 only;
 * for GTK 1 we still use the standard font selector.
 */

typedef struct fontinfo fontinfo;

typedef struct unifontsel_internal {
    /* This must be the structure's first element, for cross-casting */
    unifontsel u;
    GtkListStore *family_model, *style_model, *size_model;
    GtkWidget *family_list, *style_list, *size_entry, *size_list;
    GtkWidget *filter_buttons[4];
    GtkWidget *preview_area;
    GdkPixmap *preview_pixmap;
    int preview_width, preview_height;
    GdkColor preview_fg, preview_bg;
    int filter_flags;
    tree234 *fonts_by_realname, *fonts_by_selorder;
    fontinfo *selected;
    int selsize, intendedsize;
    int inhibit_response;  /* inhibit callbacks when we change GUI controls */
} unifontsel_internal;

/*
 * The structure held in the tree234s. All the string members are
 * part of the same allocated area, so don't need freeing
 * separately.
 */
struct fontinfo {
    char *realname;
    char *family, *charset, *style, *stylekey;
    int size, flags;
    /*
     * Fallback sorting key, to permit multiple identical entries
     * to exist in the selorder tree.
     */
    int index;
    /*
     * Indices mapping fontinfo structures to indices in the list
     * boxes. sizeindex is irrelevant if the font is scalable
     * (size==0).
     */
    int familyindex, styleindex, sizeindex;
    /*
     * The class of font.
     */
    const struct unifont_vtable *fontclass;
};

struct fontinfo_realname_find {
    const char *realname;
    int flags;
};

static int strnullcasecmp(const char *a, const char *b)
{
    int i;

    /*
     * If exactly one of the inputs is NULL, it compares before
     * the other one.
     */
    if ((i = (!b) - (!a)) != 0)
	return i;

    /*
     * NULL compares equal.
     */
    if (!a)
	return 0;

    /*
     * Otherwise, ordinary strcasecmp.
     */
    return g_ascii_strcasecmp(a, b);
}

static int fontinfo_realname_compare(void *av, void *bv)
{
    fontinfo *a = (fontinfo *)av;
    fontinfo *b = (fontinfo *)bv;
    int i;

    if ((i = strnullcasecmp(a->realname, b->realname)) != 0)
	return i;
    if ((a->flags & FONTFLAG_SORT_MASK) != (b->flags & FONTFLAG_SORT_MASK))
	return ((a->flags & FONTFLAG_SORT_MASK) <
		(b->flags & FONTFLAG_SORT_MASK) ? -1 : +1);
    return 0;
}

static int fontinfo_realname_find(void *av, void *bv)
{
    struct fontinfo_realname_find *a = (struct fontinfo_realname_find *)av;
    fontinfo *b = (fontinfo *)bv;
    int i;

    if ((i = strnullcasecmp(a->realname, b->realname)) != 0)
	return i;
    if ((a->flags & FONTFLAG_SORT_MASK) != (b->flags & FONTFLAG_SORT_MASK))
	return ((a->flags & FONTFLAG_SORT_MASK) <
		(b->flags & FONTFLAG_SORT_MASK) ? -1 : +1);
    return 0;
}

static int fontinfo_selorder_compare(void *av, void *bv)
{
    fontinfo *a = (fontinfo *)av;
    fontinfo *b = (fontinfo *)bv;
    int i;
    if ((i = strnullcasecmp(a->family, b->family)) != 0)
	return i;
    /*
     * Font class comes immediately after family, so that fonts
     * from different classes with the same family
     */
    if ((a->flags & FONTFLAG_SORT_MASK) != (b->flags & FONTFLAG_SORT_MASK))
	return ((a->flags & FONTFLAG_SORT_MASK) <
		(b->flags & FONTFLAG_SORT_MASK) ? -1 : +1);
    if ((i = strnullcasecmp(a->charset, b->charset)) != 0)
	return i;
    if ((i = strnullcasecmp(a->stylekey, b->stylekey)) != 0)
	return i;
    if ((i = strnullcasecmp(a->style, b->style)) != 0)
	return i;
    if (a->size != b->size)
	return (a->size < b->size ? -1 : +1);
    if (a->index != b->index)
	return (a->index < b->index ? -1 : +1);
    return 0;
}

static void unifontsel_deselect(unifontsel_internal *fs)
{
    fs->selected = NULL;
    gtk_list_store_clear(fs->style_model);
    gtk_list_store_clear(fs->size_model);
    gtk_widget_set_sensitive(fs->u.ok_button, FALSE);
    gtk_widget_set_sensitive(fs->size_entry, FALSE);
}

static void unifontsel_setup_familylist(unifontsel_internal *fs)
{
    GtkTreeIter iter;
    int i, listindex, minpos = -1, maxpos = -1;
    char *currfamily = NULL;
    int currflags = -1;
    fontinfo *info;

    gtk_list_store_clear(fs->family_model);
    listindex = 0;

    /*
     * Search through the font tree for anything matching our
     * current filter criteria. When we find one, add its font
     * name to the list box.
     */
    for (i = 0 ;; i++) {
	info = (fontinfo *)index234(fs->fonts_by_selorder, i);
	/*
	 * info may be NULL if we've just run off the end of the
	 * tree. We must still do a processing pass in that
	 * situation, in case we had an unfinished font record in
	 * progress.
	 */
	if (info && (info->flags &~ fs->filter_flags)) {
	    info->familyindex = -1;
	    continue;		       /* we're filtering out this font */
	}
	if (!info || strnullcasecmp(currfamily, info->family) ||
	    currflags != (info->flags & FONTFLAG_SORT_MASK)) {
	    /*
	     * We've either finished a family, or started a new
	     * one, or both.
	     */
	    if (currfamily) {
		gtk_list_store_append(fs->family_model, &iter);
		gtk_list_store_set(fs->family_model, &iter,
				   0, currfamily, 1, minpos, 2, maxpos+1, -1);
		listindex++;
	    }
	    if (info) {
		minpos = i;
		currfamily = info->family;
		currflags = info->flags & FONTFLAG_SORT_MASK;
	    }
	}
	if (!info)
	    break;		       /* now we're done */
	info->familyindex = listindex;
	maxpos = i;
    }

    /*
     * If we've just filtered out the previously selected font,
     * deselect it thoroughly.
     */
    if (fs->selected && fs->selected->familyindex < 0)
	unifontsel_deselect(fs);
}

static void unifontsel_setup_stylelist(unifontsel_internal *fs,
				       int start, int end)
{
    GtkTreeIter iter;
    int i, listindex, minpos = -1, maxpos = -1, started = FALSE;
    char *currcs = NULL, *currstyle = NULL;
    fontinfo *info;

    gtk_list_store_clear(fs->style_model);
    listindex = 0;
    started = FALSE;

    /*
     * Search through the font tree for anything matching our
     * current filter criteria. When we find one, add its charset
     * and/or style name to the list box.
     */
    for (i = start; i <= end; i++) {
	if (i == end)
	    info = NULL;
	else
	    info = (fontinfo *)index234(fs->fonts_by_selorder, i);
	/*
	 * info may be NULL if we've just run off the end of the
	 * relevant data. We must still do a processing pass in
	 * that situation, in case we had an unfinished font
	 * record in progress.
	 */
	if (info && (info->flags &~ fs->filter_flags)) {
	    info->styleindex = -1;
	    continue;		       /* we're filtering out this font */
	}
	if (!info || !started || strnullcasecmp(currcs, info->charset) ||
	     strnullcasecmp(currstyle, info->style)) {
	    /*
	     * We've either finished a style/charset, or started a
	     * new one, or both.
	     */
	    started = TRUE;
	    if (currstyle) {
		gtk_list_store_append(fs->style_model, &iter);
		gtk_list_store_set(fs->style_model, &iter,
				   0, currstyle, 1, minpos, 2, maxpos+1,
				   3, TRUE, -1);
		listindex++;
	    }
	    if (info) {
		minpos = i;
		if (info->charset && strnullcasecmp(currcs, info->charset)) {
		    gtk_list_store_append(fs->style_model, &iter);
		    gtk_list_store_set(fs->style_model, &iter,
				       0, info->charset, 1, -1, 2, -1,
				       3, FALSE, -1);
		    listindex++;
		}
		currcs = info->charset;
		currstyle = info->style;
	    }
	}
	if (!info)
	    break;		       /* now we're done */
	info->styleindex = listindex;
	maxpos = i;
    }
}

static const int unifontsel_default_sizes[] = { 10, 12, 14, 16, 20, 24, 32 };

static void unifontsel_setup_sizelist(unifontsel_internal *fs,
				      int start, int end)
{
    GtkTreeIter iter;
    int i, listindex;
    char sizetext[40];
    fontinfo *info;

    gtk_list_store_clear(fs->size_model);
    listindex = 0;

    /*
     * Search through the font tree for anything matching our
     * current filter criteria. When we find one, add its font
     * name to the list box.
     */
    for (i = start; i < end; i++) {
	info = (fontinfo *)index234(fs->fonts_by_selorder, i);
	if (info->flags &~ fs->filter_flags) {
	    info->sizeindex = -1;
	    continue;		       /* we're filtering out this font */
	}
	if (info->size) {
	    sprintf(sizetext, "%d", info->size);
	    info->sizeindex = listindex;
	    gtk_list_store_append(fs->size_model, &iter);
	    gtk_list_store_set(fs->size_model, &iter,
			       0, sizetext, 1, i, 2, info->size, -1);
	    listindex++;
	} else {
	    int j;

	    assert(i == start);
	    assert(i+1 == end);

	    for (j = 0; j < lenof(unifontsel_default_sizes); j++) {
		sprintf(sizetext, "%d", unifontsel_default_sizes[j]);
		gtk_list_store_append(fs->size_model, &iter);
		gtk_list_store_set(fs->size_model, &iter, 0, sizetext, 1, i,
				   2, unifontsel_default_sizes[j], -1);
		listindex++;
	    }
	}
    }
}

static void unifontsel_set_filter_buttons(unifontsel_internal *fs)
{
    int i;

    for (i = 0; i < lenof(fs->filter_buttons); i++) {
	int flagbit = GPOINTER_TO_INT(gtk_object_get_data
				      (GTK_OBJECT(fs->filter_buttons[i]),
				       "user-data"));
	gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(fs->filter_buttons[i]),
				     !!(fs->filter_flags & flagbit));
    }
}

static void unifontsel_draw_preview_text(unifontsel_internal *fs)
{
    unifont *font;
    char *sizename = NULL;
    fontinfo *info = fs->selected;

    if (info) {
	sizename = info->fontclass->scale_fontname
	    (GTK_WIDGET(fs->u.window), info->realname, fs->selsize);
	font = info->fontclass->create(GTK_WIDGET(fs->u.window),
				       sizename ? sizename : info->realname,
				       FALSE, FALSE, 0, 0);
    } else
	font = NULL;

    if (fs->preview_pixmap) {
	GdkGC *gc = gdk_gc_new(fs->preview_pixmap);
	gdk_gc_set_foreground(gc, &fs->preview_bg);
	gdk_draw_rectangle(fs->preview_pixmap, gc, 1, 0, 0,
			   fs->preview_width, fs->preview_height);
	gdk_gc_set_foreground(gc, &fs->preview_fg);
	if (font) {
	    /*
	     * The pangram used here is rather carefully
	     * constructed: it contains a sequence of very narrow
	     * letters (`jil') and a pair of adjacent very wide
	     * letters (`wm').
	     *
	     * If the user selects a proportional font, it will be
	     * coerced into fixed-width character cells when used
	     * in the actual terminal window. We therefore display
	     * it the same way in the preview pane, so as to show
	     * it the way it will actually be displayed - and we
	     * deliberately pick a pangram which will show the
	     * resulting miskerning at its worst.
	     *
	     * We aren't trying to sell people these fonts; we're
	     * trying to let them make an informed choice. Better
	     * that they find out the problems with using
	     * proportional fonts in terminal windows here than
	     * that they go to the effort of selecting their font
	     * and _then_ realise it was a mistake.
	     */
	    info->fontclass->draw_text(fs->preview_pixmap, gc, font,
				       0, font->ascent,
				       "bankrupt jilted showmen quiz convex fogey",
				       41, FALSE, FALSE, font->width);
	    info->fontclass->draw_text(fs->preview_pixmap, gc, font,
				       0, font->ascent + font->height,
				       "BANKRUPT JILTED SHOWMEN QUIZ CONVEX FOGEY",
				       41, FALSE, FALSE, font->width);
	    /*
	     * The ordering of punctuation here is also selected
	     * with some specific aims in mind. I put ` and '
	     * together because some software (and people) still
	     * use them as matched quotes no matter what Unicode
	     * might say on the matter, so people can quickly
	     * check whether they look silly in a candidate font.
	     * The sequence #_@ is there to let people judge the
	     * suitability of the underscore as an effectively
	     * alphabetic character (since that's how it's often
	     * used in practice, at least by programmers).
	     */
	    info->fontclass->draw_text(fs->preview_pixmap, gc, font,
				       0, font->ascent + font->height * 2,
				       "0123456789!?,.:;<>()[]{}\\/`'\"+*-=~#_@|%&^$",
				       42, FALSE, FALSE, font->width);
	}
	gdk_gc_unref(gc);
	gdk_window_invalidate_rect(fs->preview_area->window, NULL, FALSE);
    }
    if (font)
	info->fontclass->destroy(font);

    sfree(sizename);
}

static void unifontsel_select_font(unifontsel_internal *fs,
				   fontinfo *info, int size, int leftlist,
				   int size_is_explicit)
{
    int index;
    int minval, maxval;
    GtkTreePath *treepath;
    GtkTreeIter iter;

    fs->inhibit_response = TRUE;

    fs->selected = info;
    fs->selsize = size;
    if (size_is_explicit)
	fs->intendedsize = size;

    gtk_widget_set_sensitive(fs->u.ok_button, TRUE);

    /*
     * Find the index of this fontinfo in the selorder list. 
     */
    index = -1;
    findpos234(fs->fonts_by_selorder, info, NULL, &index);
    assert(index >= 0);

    /*
     * Adjust the font selector flags and redo the font family
     * list box, if necessary.
     */
    if (leftlist <= 0 &&
	(fs->filter_flags | info->flags) != fs->filter_flags) {
	fs->filter_flags |= info->flags;
	unifontsel_set_filter_buttons(fs);
	unifontsel_setup_familylist(fs);
    }

    /*
     * Find the appropriate family name and select it in the list.
     */
    assert(info->familyindex >= 0);
    treepath = gtk_tree_path_new_from_indices(info->familyindex, -1);
    gtk_tree_selection_select_path
	(gtk_tree_view_get_selection(GTK_TREE_VIEW(fs->family_list)),
	 treepath);
    gtk_tree_view_scroll_to_cell(GTK_TREE_VIEW(fs->family_list),
				 treepath, NULL, FALSE, 0.0, 0.0);
    gtk_tree_model_get_iter(GTK_TREE_MODEL(fs->family_model), &iter, treepath);
    gtk_tree_path_free(treepath);

    /*
     * Now set up the font style list.
     */
    gtk_tree_model_get(GTK_TREE_MODEL(fs->family_model), &iter,
		       1, &minval, 2, &maxval, -1);
    if (leftlist <= 1)
	unifontsel_setup_stylelist(fs, minval, maxval);

    /*
     * Find the appropriate style name and select it in the list.
     */
    if (info->style) {
	assert(info->styleindex >= 0);
	treepath = gtk_tree_path_new_from_indices(info->styleindex, -1);
	gtk_tree_selection_select_path
	    (gtk_tree_view_get_selection(GTK_TREE_VIEW(fs->style_list)),
	     treepath);
	gtk_tree_view_scroll_to_cell(GTK_TREE_VIEW(fs->style_list),
				     treepath, NULL, FALSE, 0.0, 0.0);
	gtk_tree_model_get_iter(GTK_TREE_MODEL(fs->style_model),
				&iter, treepath);
	gtk_tree_path_free(treepath);

	/*
	 * And set up the size list.
	 */
	gtk_tree_model_get(GTK_TREE_MODEL(fs->style_model), &iter,
			   1, &minval, 2, &maxval, -1);
	if (leftlist <= 2)
	    unifontsel_setup_sizelist(fs, minval, maxval);

	/*
	 * Find the appropriate size, and select it in the list.
	 */
	if (info->size) {
	    assert(info->sizeindex >= 0);
	    treepath = gtk_tree_path_new_from_indices(info->sizeindex, -1);
	    gtk_tree_selection_select_path
		(gtk_tree_view_get_selection(GTK_TREE_VIEW(fs->size_list)),
		 treepath);
	    gtk_tree_view_scroll_to_cell(GTK_TREE_VIEW(fs->size_list),
					 treepath, NULL, FALSE, 0.0, 0.0);
	    gtk_tree_path_free(treepath);
	    size = info->size;
	} else {
	    int j;
	    for (j = 0; j < lenof(unifontsel_default_sizes); j++)
		if (unifontsel_default_sizes[j] == size) {
		    treepath = gtk_tree_path_new_from_indices(j, -1);
		    gtk_tree_view_set_cursor(GTK_TREE_VIEW(fs->size_list),
					     treepath, NULL, FALSE);
		    gtk_tree_view_scroll_to_cell(GTK_TREE_VIEW(fs->size_list),
						 treepath, NULL, FALSE, 0.0,
						 0.0);
		    gtk_tree_path_free(treepath);
		}
	}

	/*
	 * And set up the font size text entry box.
	 */
	{
	    char sizetext[40];
	    sprintf(sizetext, "%d", size);
	    gtk_entry_set_text(GTK_ENTRY(fs->size_entry), sizetext);
	}
    } else {
	if (leftlist <= 2)
	    unifontsel_setup_sizelist(fs, 0, 0);
	gtk_entry_set_text(GTK_ENTRY(fs->size_entry), "");
    }

    /*
     * Grey out the font size edit box if we're not using a
     * scalable font.
     */
    gtk_entry_set_editable(GTK_ENTRY(fs->size_entry), fs->selected->size == 0);
    gtk_widget_set_sensitive(fs->size_entry, fs->selected->size == 0);

    unifontsel_draw_preview_text(fs);

    fs->inhibit_response = FALSE;
}

static void unifontsel_button_toggled(GtkToggleButton *tb, gpointer data)
{
    unifontsel_internal *fs = (unifontsel_internal *)data;
    int newstate = gtk_toggle_button_get_active(tb);
    int newflags;
    int flagbit = GPOINTER_TO_INT(gtk_object_get_data(GTK_OBJECT(tb),
						      "user-data"));

    if (newstate)
	newflags = fs->filter_flags | flagbit;
    else
	newflags = fs->filter_flags & ~flagbit;

    if (fs->filter_flags != newflags) {
	fs->filter_flags = newflags;
	unifontsel_setup_familylist(fs);
    }
}

static void unifontsel_add_entry(void *ctx, const char *realfontname,
				 const char *family, const char *charset,
				 const char *style, const char *stylekey,
				 int size, int flags,
				 const struct unifont_vtable *fontclass)
{
    unifontsel_internal *fs = (unifontsel_internal *)ctx;
    fontinfo *info;
    int totalsize;
    char *p;

    totalsize = sizeof(fontinfo) + strlen(realfontname) +
	(family ? strlen(family) : 0) + (charset ? strlen(charset) : 0) +
	(style ? strlen(style) : 0) + (stylekey ? strlen(stylekey) : 0) + 10;
    info = (fontinfo *)smalloc(totalsize);
    info->fontclass = fontclass;
    p = (char *)info + sizeof(fontinfo);
    info->realname = p;
    strcpy(p, realfontname);
    p += 1+strlen(p);
    if (family) {
	info->family = p;
	strcpy(p, family);
	p += 1+strlen(p);
    } else
	info->family = NULL;
    if (charset) {
	info->charset = p;
	strcpy(p, charset);
	p += 1+strlen(p);
    } else
	info->charset = NULL;
    if (style) {
	info->style = p;
	strcpy(p, style);
	p += 1+strlen(p);
    } else
	info->style = NULL;
    if (stylekey) {
	info->stylekey = p;
	strcpy(p, stylekey);
	p += 1+strlen(p);
    } else
	info->stylekey = NULL;
    assert(p - (char *)info <= totalsize);
    info->size = size;
    info->flags = flags;
    info->index = count234(fs->fonts_by_selorder);

    /*
     * It's just conceivable that a misbehaving font enumerator
     * might tell us about the same font real name more than once,
     * in which case we should silently drop the new one.
     */
    if (add234(fs->fonts_by_realname, info) != info) {
	sfree(info);
	return;
    }
    /*
     * However, we should never get a duplicate key in the
     * selorder tree, because the index field carefully
     * disambiguates otherwise identical records.
     */
    add234(fs->fonts_by_selorder, info);
}

static fontinfo *update_for_intended_size(unifontsel_internal *fs,
					  fontinfo *info)
{
    fontinfo info2, *below, *above;
    int pos;

    /*
     * Copy the info structure. This doesn't copy its dynamic
     * string fields, but that's unimportant because all we're
     * going to do is to adjust the size field and use it in one
     * tree search.
     */
    info2 = *info;
    info2.size = fs->intendedsize;

    /*
     * Search in the tree to find the fontinfo structure which
     * best approximates the size the user last requested.
     */
    below = findrelpos234(fs->fonts_by_selorder, &info2, NULL,
			  REL234_LE, &pos);
    above = index234(fs->fonts_by_selorder, pos+1);

    /*
     * See if we've found it exactly, which is an easy special
     * case. If we have, it'll be in `below' and not `above',
     * because we did a REL234_LE rather than REL234_LT search.
     */
    if (!fontinfo_selorder_compare(&info2, below))
	return below;

    /*
     * Now we've either found two suitable fonts, one smaller and
     * one larger, or we're at one or other extreme end of the
     * scale. Find out which, by NULLing out either of below and
     * above if it differs from this one in any respect but size
     * (and the disambiguating index field). Bear in mind, also,
     * that either one might _already_ be NULL if we're at the
     * extreme ends of the font list.
     */
    if (below) {
	info2.size = below->size;
	info2.index = below->index;
	if (fontinfo_selorder_compare(&info2, below))
	    below = NULL;
    }
    if (above) {
	info2.size = above->size;
	info2.index = above->index;
	if (fontinfo_selorder_compare(&info2, above))
	    above = NULL;
    }

    /*
     * Now return whichever of above and below is non-NULL, if
     * that's unambiguous.
     */
    if (!above)
	return below;
    if (!below)
	return above;

    /*
     * And now we really do have to make a choice about whether to
     * round up or down. We'll do it by rounding to nearest,
     * breaking ties by rounding up.
     */
    if (above->size - fs->intendedsize <= fs->intendedsize - below->size)
	return above;
    else
	return below;
}

static void family_changed(GtkTreeSelection *treeselection, gpointer data)
{
    unifontsel_internal *fs = (unifontsel_internal *)data;
    GtkTreeModel *treemodel;
    GtkTreeIter treeiter;
    int minval;
    fontinfo *info;

    if (fs->inhibit_response)	       /* we made this change ourselves */
	return;

    if (!gtk_tree_selection_get_selected(treeselection, &treemodel, &treeiter))
	return;

    gtk_tree_model_get(treemodel, &treeiter, 1, &minval, -1);
    info = (fontinfo *)index234(fs->fonts_by_selorder, minval);
    info = update_for_intended_size(fs, info);
    if (!info)
	return; /* _shouldn't_ happen unless font list is completely funted */
    if (!info->size)
	fs->selsize = fs->intendedsize;   /* font is scalable */
    unifontsel_select_font(fs, info, info->size ? info->size : fs->selsize,
			   1, FALSE);
}

static void style_changed(GtkTreeSelection *treeselection, gpointer data)
{
    unifontsel_internal *fs = (unifontsel_internal *)data;
    GtkTreeModel *treemodel;
    GtkTreeIter treeiter;
    int minval;
    fontinfo *info;

    if (fs->inhibit_response)	       /* we made this change ourselves */
	return;

    if (!gtk_tree_selection_get_selected(treeselection, &treemodel, &treeiter))
	return;

    gtk_tree_model_get(treemodel, &treeiter, 1, &minval, -1);
    if (minval < 0)
        return;                    /* somehow a charset heading got clicked */
    info = (fontinfo *)index234(fs->fonts_by_selorder, minval);
    info = update_for_intended_size(fs, info);
    if (!info)
	return; /* _shouldn't_ happen unless font list is completely funted */
    if (!info->size)
	fs->selsize = fs->intendedsize;   /* font is scalable */
    unifontsel_select_font(fs, info, info->size ? info->size : fs->selsize,
			   2, FALSE);
}

static void size_changed(GtkTreeSelection *treeselection, gpointer data)
{
    unifontsel_internal *fs = (unifontsel_internal *)data;
    GtkTreeModel *treemodel;
    GtkTreeIter treeiter;
    int minval, size;
    fontinfo *info;

    if (fs->inhibit_response)	       /* we made this change ourselves */
	return;

    if (!gtk_tree_selection_get_selected(treeselection, &treemodel, &treeiter))
	return;

    gtk_tree_model_get(treemodel, &treeiter, 1, &minval, 2, &size, -1);
    info = (fontinfo *)index234(fs->fonts_by_selorder, minval);
    unifontsel_select_font(fs, info, info->size ? info->size : size, 3, TRUE);
}

static void size_entry_changed(GtkEditable *ed, gpointer data)
{
    unifontsel_internal *fs = (unifontsel_internal *)data;
    const char *text;
    int size;

    if (fs->inhibit_response)	       /* we made this change ourselves */
	return;

    text = gtk_entry_get_text(GTK_ENTRY(ed));
    size = atoi(text);

    if (size > 0) {
	assert(fs->selected->size == 0);
	unifontsel_select_font(fs, fs->selected, size, 3, TRUE);
    }
}

static void alias_resolve(GtkTreeView *treeview, GtkTreePath *path,
			  GtkTreeViewColumn *column, gpointer data)
{
    unifontsel_internal *fs = (unifontsel_internal *)data;
    GtkTreeIter iter;
    int minval, newsize;
    fontinfo *info, *newinfo;
    char *newname;

    if (fs->inhibit_response)	       /* we made this change ourselves */
	return;

    gtk_tree_model_get_iter(GTK_TREE_MODEL(fs->family_model), &iter, path);
    gtk_tree_model_get(GTK_TREE_MODEL(fs->family_model), &iter, 1,&minval, -1);
    info = (fontinfo *)index234(fs->fonts_by_selorder, minval);
    if (info) {
	int flags;
	struct fontinfo_realname_find f;

	newname = info->fontclass->canonify_fontname
	    (GTK_WIDGET(fs->u.window), info->realname, &newsize, &flags, TRUE);

	f.realname = newname;
	f.flags = flags;
	newinfo = find234(fs->fonts_by_realname, &f, fontinfo_realname_find);

	sfree(newname);
	if (!newinfo)
	    return;		       /* font name not in our index */
	if (newinfo == info)
	    return;   /* didn't change under canonification => not an alias */
	unifontsel_select_font(fs, newinfo,
			       newinfo->size ? newinfo->size : newsize,
			       1, TRUE);
    }
}

static gint unifontsel_expose_area(GtkWidget *widget, GdkEventExpose *event,
				   gpointer data)
{
    unifontsel_internal *fs = (unifontsel_internal *)data;

    if (fs->preview_pixmap) {
	gdk_draw_pixmap(widget->window,
			widget->style->fg_gc[GTK_WIDGET_STATE(widget)],
			fs->preview_pixmap,
			event->area.x, event->area.y,
			event->area.x, event->area.y,
			event->area.width, event->area.height);
    }
    return TRUE;
}

static gint unifontsel_configure_area(GtkWidget *widget,
				      GdkEventConfigure *event, gpointer data)
{
    unifontsel_internal *fs = (unifontsel_internal *)data;
    int ox, oy, nx, ny, x, y;

    /*
     * Enlarge the pixmap, but never shrink it.
     */
    ox = fs->preview_width;
    oy = fs->preview_height;
    x = event->width;
    y = event->height;
    if (x > ox || y > oy) {
	if (fs->preview_pixmap)
	    gdk_pixmap_unref(fs->preview_pixmap);
	
	nx = (x > ox ? x : ox);
	ny = (y > oy ? y : oy);
	fs->preview_pixmap = gdk_pixmap_new(widget->window, nx, ny, -1);
	fs->preview_width = nx;
	fs->preview_height = ny;

	unifontsel_draw_preview_text(fs);
    }

    gdk_window_invalidate_rect(widget->window, NULL, FALSE);

    return TRUE;
}

unifontsel *unifontsel_new(const char *wintitle)
{
    unifontsel_internal *fs = snew(unifontsel_internal);
    GtkWidget *table, *label, *w, *ww, *scroll;
    GtkListStore *model;
    GtkTreeViewColumn *column;
    int lists_height, preview_height, font_width, style_width, size_width;
    int i;

    fs->inhibit_response = FALSE;
    fs->selected = NULL;

    {
	/*
	 * Invent some magic size constants.
	 */
	GtkRequisition req;
	label = gtk_label_new("Quite Long Font Name (Foundry)");
	gtk_widget_size_request(label, &req);
	font_width = req.width;
	lists_height = 14 * req.height;
	preview_height = 5 * req.height;
	gtk_label_set_text(GTK_LABEL(label), "Italic Extra Condensed");
	gtk_widget_size_request(label, &req);
	style_width = req.width;
	gtk_label_set_text(GTK_LABEL(label), "48000");
	gtk_widget_size_request(label, &req);
	size_width = req.width;
#if GTK_CHECK_VERSION(2,10,0)
	g_object_ref_sink(label);
	g_object_unref(label);
#else
        gtk_object_sink(GTK_OBJECT(label));
#endif
    }

    /*
     * Create the dialog box and initialise the user-visible
     * fields in the returned structure.
     */
    fs->u.user_data = NULL;
    fs->u.window = GTK_WINDOW(gtk_dialog_new());
    gtk_window_set_title(fs->u.window, wintitle);
    fs->u.cancel_button = gtk_dialog_add_button
	(GTK_DIALOG(fs->u.window), GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL);
    fs->u.ok_button = gtk_dialog_add_button
	(GTK_DIALOG(fs->u.window), GTK_STOCK_OK, GTK_RESPONSE_OK);
    gtk_widget_grab_default(fs->u.ok_button);

    /*
     * Now set up the internal fields, including in particular all
     * the controls that actually allow the user to select fonts.
     */
    table = gtk_table_new(8, 3, FALSE);
    gtk_widget_show(table);
    gtk_table_set_col_spacings(GTK_TABLE(table), 8);
#if GTK_CHECK_VERSION(2,4,0)
    /* GtkAlignment seems to be the simplest way to put padding round things */
    w = gtk_alignment_new(0, 0, 1, 1);
    gtk_alignment_set_padding(GTK_ALIGNMENT(w), 8, 8, 8, 8);
    gtk_container_add(GTK_CONTAINER(w), table);
    gtk_widget_show(w);
#else
    w = table;
#endif
    gtk_box_pack_start(GTK_BOX(GTK_DIALOG(fs->u.window)->vbox),
		       w, TRUE, TRUE, 0);

    label = gtk_label_new_with_mnemonic("_Font:");
    gtk_widget_show(label);
    gtk_misc_set_alignment(GTK_MISC(label), 0.0, 0.0);
    gtk_table_attach(GTK_TABLE(table), label, 0, 1, 0, 1, GTK_FILL, 0, 0, 0);

    /*
     * The Font list box displays only a string, but additionally
     * stores two integers which give the limits within the
     * tree234 of the font entries covered by this list entry.
     */
    model = gtk_list_store_new(3, G_TYPE_STRING, G_TYPE_INT, G_TYPE_INT);
    w = gtk_tree_view_new_with_model(GTK_TREE_MODEL(model));
    gtk_tree_view_set_headers_visible(GTK_TREE_VIEW(w), FALSE);
    gtk_label_set_mnemonic_widget(GTK_LABEL(label), w);
    gtk_widget_show(w);
    column = gtk_tree_view_column_new_with_attributes
	("Font", gtk_cell_renderer_text_new(),
	 "text", 0, (char *)NULL);
    gtk_tree_view_column_set_sizing(column, GTK_TREE_VIEW_COLUMN_AUTOSIZE);
    gtk_tree_view_append_column(GTK_TREE_VIEW(w), column);
    g_signal_connect(G_OBJECT(gtk_tree_view_get_selection(GTK_TREE_VIEW(w))),
		     "changed", G_CALLBACK(family_changed), fs);
    g_signal_connect(G_OBJECT(w), "row-activated",
		     G_CALLBACK(alias_resolve), fs);

    scroll = gtk_scrolled_window_new(NULL, NULL);
    gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(scroll),
					GTK_SHADOW_IN);
    gtk_container_add(GTK_CONTAINER(scroll), w);
    gtk_widget_show(scroll);
    gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scroll),
				   GTK_POLICY_AUTOMATIC, GTK_POLICY_ALWAYS);
    gtk_widget_set_size_request(scroll, font_width, lists_height);
    gtk_table_attach(GTK_TABLE(table), scroll, 0, 1, 1, 3, GTK_FILL,
		     GTK_EXPAND | GTK_FILL, 0, 0);
    fs->family_model = model;
    fs->family_list = w;

    label = gtk_label_new_with_mnemonic("_Style:");
    gtk_widget_show(label);
    gtk_misc_set_alignment(GTK_MISC(label), 0.0, 0.0);
    gtk_table_attach(GTK_TABLE(table), label, 1, 2, 0, 1, GTK_FILL, 0, 0, 0);

    /*
     * The Style list box can contain insensitive elements
     * (character set headings for server-side fonts), so we add
     * an extra column to the list store to hold that information.
     */
    model = gtk_list_store_new(4, G_TYPE_STRING, G_TYPE_INT, G_TYPE_INT,
			       G_TYPE_BOOLEAN);
    w = gtk_tree_view_new_with_model(GTK_TREE_MODEL(model));
    gtk_tree_view_set_headers_visible(GTK_TREE_VIEW(w), FALSE);
    gtk_label_set_mnemonic_widget(GTK_LABEL(label), w);
    gtk_widget_show(w);
    column = gtk_tree_view_column_new_with_attributes
	("Style", gtk_cell_renderer_text_new(),
	 "text", 0, "sensitive", 3, (char *)NULL);
    gtk_tree_view_column_set_sizing(column, GTK_TREE_VIEW_COLUMN_AUTOSIZE);
    gtk_tree_view_append_column(GTK_TREE_VIEW(w), column);
    g_signal_connect(G_OBJECT(gtk_tree_view_get_selection(GTK_TREE_VIEW(w))),
		     "changed", G_CALLBACK(style_changed), fs);

    scroll = gtk_scrolled_window_new(NULL, NULL);
    gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(scroll),
					GTK_SHADOW_IN);
    gtk_container_add(GTK_CONTAINER(scroll), w);
    gtk_widget_show(scroll);
    gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scroll),
				   GTK_POLICY_AUTOMATIC, GTK_POLICY_ALWAYS);
    gtk_widget_set_size_request(scroll, style_width, lists_height);
    gtk_table_attach(GTK_TABLE(table), scroll, 1, 2, 1, 3, GTK_FILL,
		     GTK_EXPAND | GTK_FILL, 0, 0);
    fs->style_model = model;
    fs->style_list = w;

    label = gtk_label_new_with_mnemonic("Si_ze:");
    gtk_widget_show(label);
    gtk_misc_set_alignment(GTK_MISC(label), 0.0, 0.0);
    gtk_table_attach(GTK_TABLE(table), label, 2, 3, 0, 1, GTK_FILL, 0, 0, 0);

    /*
     * The Size label attaches primarily to a text input box so
     * that the user can select a size of their choice. The list
     * of available sizes is secondary.
     */
    fs->size_entry = w = gtk_entry_new();
    gtk_label_set_mnemonic_widget(GTK_LABEL(label), w);
    gtk_widget_set_size_request(w, size_width, -1);
    gtk_widget_show(w);
    gtk_table_attach(GTK_TABLE(table), w, 2, 3, 1, 2, GTK_FILL, 0, 0, 0);
    g_signal_connect(G_OBJECT(w), "changed", G_CALLBACK(size_entry_changed),
		     fs);

    model = gtk_list_store_new(3, G_TYPE_STRING, G_TYPE_INT, G_TYPE_INT);
    w = gtk_tree_view_new_with_model(GTK_TREE_MODEL(model));
    gtk_tree_view_set_headers_visible(GTK_TREE_VIEW(w), FALSE);
    gtk_widget_show(w);
    column = gtk_tree_view_column_new_with_attributes
	("Size", gtk_cell_renderer_text_new(),
	 "text", 0, (char *)NULL);
    gtk_tree_view_column_set_sizing(column, GTK_TREE_VIEW_COLUMN_AUTOSIZE);
    gtk_tree_view_append_column(GTK_TREE_VIEW(w), column);
    g_signal_connect(G_OBJECT(gtk_tree_view_get_selection(GTK_TREE_VIEW(w))),
		     "changed", G_CALLBACK(size_changed), fs);

    scroll = gtk_scrolled_window_new(NULL, NULL);
    gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(scroll),
					GTK_SHADOW_IN);
    gtk_container_add(GTK_CONTAINER(scroll), w);
    gtk_widget_show(scroll);
    gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scroll),
				   GTK_POLICY_AUTOMATIC, GTK_POLICY_ALWAYS);
    gtk_table_attach(GTK_TABLE(table), scroll, 2, 3, 2, 3, GTK_FILL,
		     GTK_EXPAND | GTK_FILL, 0, 0);
    fs->size_model = model;
    fs->size_list = w;

    /*
     * Preview widget.
     */
    fs->preview_area = gtk_drawing_area_new();
    fs->preview_pixmap = NULL;
    fs->preview_width = 0;
    fs->preview_height = 0;
    fs->preview_fg.pixel = fs->preview_bg.pixel = 0;
    fs->preview_fg.red = fs->preview_fg.green = fs->preview_fg.blue = 0x0000;
    fs->preview_bg.red = fs->preview_bg.green = fs->preview_bg.blue = 0xFFFF;
    gdk_colormap_alloc_color(gdk_colormap_get_system(), &fs->preview_fg,
			     FALSE, FALSE);
    gdk_colormap_alloc_color(gdk_colormap_get_system(), &fs->preview_bg,
			     FALSE, FALSE);
    gtk_signal_connect(GTK_OBJECT(fs->preview_area), "expose_event",
		       GTK_SIGNAL_FUNC(unifontsel_expose_area), fs);
    gtk_signal_connect(GTK_OBJECT(fs->preview_area), "configure_event",
		       GTK_SIGNAL_FUNC(unifontsel_configure_area), fs);
    gtk_widget_set_size_request(fs->preview_area, 1, preview_height);
    gtk_widget_show(fs->preview_area);
    ww = fs->preview_area;
    w = gtk_frame_new(NULL);
    gtk_container_add(GTK_CONTAINER(w), ww);
    gtk_widget_show(w);
#if GTK_CHECK_VERSION(2,4,0)
    ww = w;
    /* GtkAlignment seems to be the simplest way to put padding round things */
    w = gtk_alignment_new(0, 0, 1, 1);
    gtk_alignment_set_padding(GTK_ALIGNMENT(w), 8, 8, 8, 8);
    gtk_container_add(GTK_CONTAINER(w), ww);
    gtk_widget_show(w);
#endif
    ww = w;
    w = gtk_frame_new("Preview of font");
    gtk_container_add(GTK_CONTAINER(w), ww);
    gtk_widget_show(w);
    gtk_table_attach(GTK_TABLE(table), w, 0, 3, 3, 4,
		     GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 8);

    i = 0;
    w = gtk_check_button_new_with_label("Show client-side fonts");
    gtk_object_set_data(GTK_OBJECT(w), "user-data",
			GINT_TO_POINTER(FONTFLAG_CLIENTSIDE));
    gtk_signal_connect(GTK_OBJECT(w), "toggled",
		       GTK_SIGNAL_FUNC(unifontsel_button_toggled), fs);
    gtk_widget_show(w);
    fs->filter_buttons[i++] = w;
    gtk_table_attach(GTK_TABLE(table), w, 0, 3, 4, 5, GTK_FILL, 0, 0, 0);
    w = gtk_check_button_new_with_label("Show server-side fonts");
    gtk_object_set_data(GTK_OBJECT(w), "user-data",
			GINT_TO_POINTER(FONTFLAG_SERVERSIDE));
    gtk_signal_connect(GTK_OBJECT(w), "toggled",
		       GTK_SIGNAL_FUNC(unifontsel_button_toggled), fs);
    gtk_widget_show(w);
    fs->filter_buttons[i++] = w;
    gtk_table_attach(GTK_TABLE(table), w, 0, 3, 5, 6, GTK_FILL, 0, 0, 0);
    w = gtk_check_button_new_with_label("Show server-side font aliases");
    gtk_object_set_data(GTK_OBJECT(w), "user-data",
			GINT_TO_POINTER(FONTFLAG_SERVERALIAS));
    gtk_signal_connect(GTK_OBJECT(w), "toggled",
		       GTK_SIGNAL_FUNC(unifontsel_button_toggled), fs);
    gtk_widget_show(w);
    fs->filter_buttons[i++] = w;
    gtk_table_attach(GTK_TABLE(table), w, 0, 3, 6, 7, GTK_FILL, 0, 0, 0);
    w = gtk_check_button_new_with_label("Show non-monospaced fonts");
    gtk_object_set_data(GTK_OBJECT(w), "user-data",
			GINT_TO_POINTER(FONTFLAG_NONMONOSPACED));
    gtk_signal_connect(GTK_OBJECT(w), "toggled",
		       GTK_SIGNAL_FUNC(unifontsel_button_toggled), fs);
    gtk_widget_show(w);
    fs->filter_buttons[i++] = w;
    gtk_table_attach(GTK_TABLE(table), w, 0, 3, 7, 8, GTK_FILL, 0, 0, 0);

    assert(i == lenof(fs->filter_buttons));
    fs->filter_flags = FONTFLAG_CLIENTSIDE | FONTFLAG_SERVERSIDE |
	FONTFLAG_SERVERALIAS;
    unifontsel_set_filter_buttons(fs);

    /*
     * Go and find all the font names, and set up our master font
     * list.
     */
    fs->fonts_by_realname = newtree234(fontinfo_realname_compare);
    fs->fonts_by_selorder = newtree234(fontinfo_selorder_compare);
    for (i = 0; i < lenof(unifont_types); i++)
	unifont_types[i]->enum_fonts(GTK_WIDGET(fs->u.window),
				     unifontsel_add_entry, fs);

    /*
     * And set up the initial font names list.
     */
    unifontsel_setup_familylist(fs);

    fs->selsize = fs->intendedsize = 13;   /* random default */
    gtk_widget_set_sensitive(fs->u.ok_button, FALSE);

    return (unifontsel *)fs;
}

void unifontsel_destroy(unifontsel *fontsel)
{
    unifontsel_internal *fs = (unifontsel_internal *)fontsel;
    fontinfo *info;

    if (fs->preview_pixmap)
	gdk_pixmap_unref(fs->preview_pixmap);

    freetree234(fs->fonts_by_selorder);
    while ((info = delpos234(fs->fonts_by_realname, 0)) != NULL)
	sfree(info);
    freetree234(fs->fonts_by_realname);

    gtk_widget_destroy(GTK_WIDGET(fs->u.window));
    sfree(fs);
}

void unifontsel_set_name(unifontsel *fontsel, const char *fontname)
{
    unifontsel_internal *fs = (unifontsel_internal *)fontsel;
    int i, start, end, size, flags;
    const char *fontname2 = NULL;
    fontinfo *info;

    /*
     * Provide a default if given an empty or null font name.
     */
    if (!fontname || !*fontname)
	fontname = "server:fixed";

    /*
     * Call the canonify_fontname function.
     */
    fontname = unifont_do_prefix(fontname, &start, &end);
    for (i = start; i < end; i++) {
	fontname2 = unifont_types[i]->canonify_fontname
	    (GTK_WIDGET(fs->u.window), fontname, &size, &flags, FALSE);
	if (fontname2)
	    break;
    }
    if (i == end)
	return;			       /* font name not recognised */

    /*
     * Now look up the canonified font name in our index.
     */
    {
	struct fontinfo_realname_find f;
	f.realname = fontname2;
	f.flags = flags;
	info = find234(fs->fonts_by_realname, &f, fontinfo_realname_find);
    }

    /*
     * If we've found the font, and its size field is either
     * correct or zero (the latter indicating a scalable font),
     * then we're done. Otherwise, try looking up the original
     * font name instead.
     */
    if (!info || (info->size != size && info->size != 0)) {
	struct fontinfo_realname_find f;
	f.realname = fontname;
	f.flags = flags;

	info = find234(fs->fonts_by_realname, &f, fontinfo_realname_find);
	if (!info || info->size != size)
	    return;		       /* font name not in our index */
    }

    /*
     * Now we've got a fontinfo structure and a font size, so we
     * know everything we need to fill in all the fields in the
     * dialog.
     */
    unifontsel_select_font(fs, info, size, 0, TRUE);
}

char *unifontsel_get_name(unifontsel *fontsel)
{
    unifontsel_internal *fs = (unifontsel_internal *)fontsel;
    char *name;

    if (!fs->selected)
	return NULL;

    if (fs->selected->size == 0) {
	name = fs->selected->fontclass->scale_fontname
	    (GTK_WIDGET(fs->u.window), fs->selected->realname, fs->selsize);
	if (name) {
	    char *ret = dupcat(fs->selected->fontclass->prefix, ":",
			       name, NULL);
	    sfree(name);
	    return ret;
	}
    }

    return dupcat(fs->selected->fontclass->prefix, ":",
		  fs->selected->realname, NULL);
}

#endif /* GTK_CHECK_VERSION(2,0,0) */