summaryrefslogtreecommitdiffstats
path: root/generic/tkBind.c
blob: e77667f3d0a6a52583a428ee43db1ff16dce29d9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
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
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
/*
 * tkBind.c --
 *
 *	This file provides functions that associate Tcl commands with X events
 *	or sequences of X events.
 *
 * Copyright (c) 1989-1994 The Regents of the University of California.
 * Copyright (c) 1994-1997 Sun Microsystems, Inc.
 * Copyright (c) 1998 by Scriptics Corporation.
 *
 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * RCS: @(#) $Id: tkBind.c,v 1.68 2010/06/21 12:14:08 nijtmans Exp $
 */

#include "tkInt.h"

#ifdef __WIN32__
#include "tkWinInt.h"
#endif

#if !(defined(__WIN32__) || defined(MAC_OSX_TK)) /* UNIX */
#include "tkUnixInt.h"
#endif

/*
 * File structure:
 *
 * Structure definitions and static variables.
 *
 * Init/Free this package.
 *
 * Tcl "bind" command (actually located in tkCmds.c) core implementation, plus
 * helpers.
 *
 * Tcl "event" command implementation, plus helpers.
 *
 * Package-specific common helpers.
 *
 * Non-package-specific helpers.
 */

/*
 * The following union is used to hold the detail information from an XEvent
 * (including Tk's XVirtualEvent extension).
 */

typedef union {
    KeySym keySym;		/* KeySym that corresponds to xkey.keycode. */
    int button;			/* Button that was pressed (xbutton.button). */
    Tk_Uid name;		/* Tk_Uid of virtual event. */
    ClientData clientData;	/* Used when type of Detail is unknown, and to
				 * ensure that all bytes of Detail are
				 * initialized when this structure is used in
				 * a hash key. */
} Detail;

/*
 * The structure below represents a binding table. A binding table represents
 * a domain in which event bindings may occur. It includes a space of objects
 * relative to which events occur (usually windows, but not always), a history
 * of recent events in the domain, and a set of mappings that associate
 * particular Tcl commands with sequences of events in the domain. Multiple
 * binding tables may exist at once, either because there are multiple
 * applications open, or because there are multiple domains within an
 * application with separate event bindings for each (for example, each canvas
 * widget has a separate binding table for associating events with the items
 * in the canvas).
 *
 * Note: it is probably a bad idea to reduce EVENT_BUFFER_SIZE much below 30.
 * To see this, consider a triple mouse button click while the Shift key is
 * down (and auto-repeating). There may be as many as 3 auto-repeat events
 * after each mouse button press or release (see the first large comment block
 * within Tk_BindEvent for more on this), for a total of 20 events to cover
 * the three button presses and two intervening releases. If you reduce
 * EVENT_BUFFER_SIZE too much, shift multi-clicks will be lost.
 */

#define EVENT_BUFFER_SIZE 30
typedef struct Tk_BindingTable_ {
    XEvent eventRing[EVENT_BUFFER_SIZE];
				/* Circular queue of recent events (higher
				 * indices are for more recent events). */
    Detail detailRing[EVENT_BUFFER_SIZE];
				/* "Detail" information (keySym, button,
				 * Tk_Uid, or 0) for each entry in
				 * eventRing. */
    int curEvent;		/* Index in eventRing of most recent event.
				 * Newer events have higher indices. */
    Tcl_HashTable patternTable;	/* Used to map from an event to a list of
				 * patterns that may match that event. Keys
				 * are PatternTableKey structs, values are
				 * (PatSeq *). */
    Tcl_HashTable objectTable;	/* Used to map from an object to a list of
				 * patterns associated with that object. Keys
				 * are ClientData, values are (PatSeq *). */
    Tcl_Interp *interp;		/* Interpreter in which commands are
				 * executed. */
} BindingTable;

/*
 * The following structure represents virtual event table. A virtual event
 * table provides a way to map from platform-specific physical events such as
 * button clicks or key presses to virtual events such as <<Paste>>,
 * <<Close>>, or <<ScrollWindow>>.
 *
 * A virtual event is usually never part of the event stream, but instead is
 * synthesized inline by matching low-level events. However, a virtual event
 * may be generated by platform-specific code or by Tcl commands. In that case,
 * no lookup of the virtual event will need to be done using this table,
 * because the virtual event is actually in the event stream.
 */

typedef struct {
    Tcl_HashTable patternTable;	/* Used to map from a physical event to a list
				 * of patterns that may match that event. Keys
				 * are PatternTableKey structs, values are
				 * (PatSeq *). */
    Tcl_HashTable nameTable;	/* Used to map a virtual event name to the
				 * array of physical events that can trigger
				 * it. Keys are the Tk_Uid names of the
				 * virtual events, values are PhysicalsOwned
				 * structs. */
} VirtualEventTable;

/*
 * The following structure is used as a key in a patternTable for both binding
 * tables and a virtual event tables.
 *
 * In a binding table, the object field corresponds to the binding tag for the
 * widget whose bindings are being accessed.
 *
 * In a virtual event table, the object field is always NULL. Virtual events
 * are a global definiton and are not tied to a particular binding tag.
 *
 * The same key is used for both types of pattern tables so that the helper
 * functions that traverse and match patterns will work for both binding
 * tables and virtual event tables.
 */

typedef struct {
    ClientData object;		/* For binding table, identifies the binding
				 * tag of the object (or class of objects)
				 * relative to which the event occurred. For
				 * virtual event table, always NULL. */
    int type;			/* Type of event (from X). */
    Detail detail;		/* Additional information, such as keysym,
				 * button, Tk_Uid, or 0 if nothing
				 * additional. */
} PatternTableKey;

/*
 * The following structure defines a pattern, which is matched against X
 * events as part of the process of converting X events into Tcl commands.
 */

typedef struct {
    int eventType;		/* Type of X event, e.g. ButtonPress. */
    int needMods;		/* Mask of modifiers that must be present (0
				 * means no modifiers are required). */
    Detail detail;		/* Additional information that must match
				 * event. Normally this is 0, meaning no
				 * additional information must match. For
				 * KeyPress and KeyRelease events, a keySym
				 * may be specified to select a particular
				 * keystroke (0 means any keystrokes). For
				 * button events, specifies a particular
				 * button (0 means any buttons are OK). For
				 * virtual events, specifies the Tk_Uid of the
				 * virtual event name (never 0). */
} Pattern;

/*
 * The following structure defines a pattern sequence, which consists of one
 * or more patterns. In order to trigger, a pattern sequence must match the
 * most recent X events (first pattern to most recent event, next pattern to
 * next event, and so on). It is used as the hash value in a patternTable for
 * both binding tables and virtual event tables.
 *
 * In a binding table, it is the sequence of physical events that make up a
 * binding for an object.
 *
 * In a virtual event table, it is the sequence of physical events that define
 * a virtual event.
 *
 * The same structure is used for both types of pattern tables so that the
 * helper functions that traverse and match patterns will work for both
 * binding tables and virtual event tables.
 */

typedef struct PatSeq {
    int numPats;		/* Number of patterns in sequence (usually
				 * 1). */
    char *script;		/* Binding script to evaluate when sequence
				 * matches (ckalloc()ed) */
    int flags;			/* Miscellaneous flag values; see below for
				 * definitions. */
    struct PatSeq *nextSeqPtr;	/* Next in list of all pattern sequences that
				 * have the same initial pattern. NULL means
				 * end of list. */
    Tcl_HashEntry *hPtr;	/* Pointer to hash table entry for the initial
				 * pattern. This is the head of the list of
				 * which nextSeqPtr forms a part. */
    struct VirtualOwners *voPtr;/* In a binding table, always NULL. In a
				 * virtual event table, identifies the array
				 * of virtual events that can be triggered by
				 * this event. */
    struct PatSeq *nextObjPtr;	/* In a binding table, next in list of all
				 * pattern sequences for the same object (NULL
				 * for end of list). Needed to implement
				 * Tk_DeleteAllBindings. In a virtual event
				 * table, always NULL. */
    Pattern pats[1];		/* Array of "numPats" patterns. Only one
				 * element is declared here but in actuality
				 * enough space will be allocated for
				 * "numPats" patterns. To match, pats[0] must
				 * match event n, pats[1] must match event
				 * n-1, etc. */
} PatSeq;

/*
 * Flag values for PatSeq structures:
 *
 * PAT_NEARBY		1 means that all of the events matching this sequence
 *			must occur with nearby X and Y mouse coordinates and
 *			close in time. This is typically used to restrict
 *			multiple button presses.
 */

#define PAT_NEARBY		0x1

/*
 * Constants that define how close together two events must be in milliseconds
 * or pixels to meet the PAT_NEARBY constraint:
 */

#define NEARBY_PIXELS		5
#define NEARBY_MS		500

/*
 * The following structure keeps track of all the virtual events that are
 * associated with a particular physical event. It is pointed to by the voPtr
 * field in a PatSeq in the patternTable of a virtual event table.
 */

typedef struct VirtualOwners {
    int numOwners;		/* Number of virtual events to trigger. */
    Tcl_HashEntry *owners[1];	/* Array of pointers to entries in nameTable.
				 * Enough space will actually be allocated for
				 * numOwners hash entries. */
} VirtualOwners;

/*
 * The following structure is used in the nameTable of a virtual event table
 * to associate a virtual event with all the physical events that can trigger
 * it.
 */
typedef struct {
    int numOwned;		/* Number of physical events owned. */
    PatSeq *patSeqs[1];		/* Array of pointers to physical event
				 * patterns. Enough space will actually be
				 * allocated to hold numOwned. */
} PhysicalsOwned;

/*
 * One of the following structures exists for each interpreter. This structure
 * keeps track of the current display and screen in the interpreter, so that a
 * command can be invoked whenever the display/screen changes (the command does
 * things like point tk::Priv at a display-specific structure).
 */

typedef struct {
    TkDisplay *curDispPtr;	/* Display for last binding command invoked in
				 * this application. */
    int curScreenIndex;		/* Index of screen for last binding command */
    int bindingDepth;		/* Number of active instances of Tk_BindEvent
				 * in this application. */
} ScreenInfo;

/*
 * The following structure keeps track of all the information local to the
 * binding package on a per interpreter basis.
 */

typedef struct TkBindInfo_ {
    VirtualEventTable virtualEventTable;
				/* The virtual events that exist in this
				 * interpreter. */
    ScreenInfo screenInfo;	/* Keeps track of the current display and
				 * screen, so it can be restored after a
				 * binding has executed. */
    int deleted;		/* 1 the application has been deleted but the
				 * structure has been preserved. */
} BindInfo;

/*
 * In X11R4 and earlier versions, XStringToKeysym is ridiculously slow. The
 * data structure and hash table below, along with the code that uses them,
 * implement a fast mapping from strings to keysyms. In X11R5 and later
 * releases XStringToKeysym is plenty fast so this stuff isn't needed. The
 * #define REDO_KEYSYM_LOOKUP is normally undefined, so that XStringToKeysym
 * gets used. It can be set in the Makefile to enable the use of the hash
 * table below.
 */

#ifdef REDO_KEYSYM_LOOKUP
typedef struct {
    const char *name;			/* Name of keysym. */
    KeySym value;		/* Numeric identifier for keysym. */
} KeySymInfo;
static const KeySymInfo keyArray[] = {
#ifndef lint
#include "ks_names.h"
#endif
    {NULL, 0}
};
static Tcl_HashTable keySymTable; /* keyArray hashed by keysym value. */
static Tcl_HashTable nameTable;	/* keyArray hashed by keysym name. */
#endif /* REDO_KEYSYM_LOOKUP */

/*
 * Set to non-zero when the package-wide static variables have been
 * initialized.
 */

static int initialized = 0;
TCL_DECLARE_MUTEX(bindMutex)

/*
 * A hash table is kept to map from the string names of event modifiers to
 * information about those modifiers. The structure for storing this
 * information, and the hash table built at initialization time, are defined
 * below.
 */

typedef struct {
    const char *name; /* Name of modifier. */
    int mask;			/* Button/modifier mask value, such as
				 * Button1Mask. */
    int flags;			/* Various flags; see below for
				 * definitions. */
} ModInfo;

/*
 * Flags for ModInfo structures:
 *
 * DOUBLE -		Non-zero means duplicate this event,
 *			e.g. for double-clicks.
 * TRIPLE -		Non-zero means triplicate this event,
 *			e.g. for triple-clicks.
 * QUADRUPLE -		Non-zero means quadruple this event,
 *			e.g. for 4-fold-clicks.
 * MULT_CLICKS -	Combination of all of above.
 */

#define DOUBLE		1
#define TRIPLE		2
#define QUADRUPLE	4
#define MULT_CLICKS	7

static const ModInfo modArray[] = {
    {"Control",		ControlMask,	0},
    {"Shift",		ShiftMask,	0},
    {"Lock",		LockMask,	0},
    {"Meta",		META_MASK,	0},
    {"M",		META_MASK,	0},
    {"Alt",		ALT_MASK,	0},
    {"Extended",	EXTENDED_MASK,	0},
    {"B1",		Button1Mask,	0},
    {"Button1",		Button1Mask,	0},
    {"B2",		Button2Mask,	0},
    {"Button2",		Button2Mask,	0},
    {"B3",		Button3Mask,	0},
    {"Button3",		Button3Mask,	0},
    {"B4",		Button4Mask,	0},
    {"Button4",		Button4Mask,	0},
    {"B5",		Button5Mask,	0},
    {"Button5",		Button5Mask,	0},
    {"Mod1",		Mod1Mask,	0},
    {"M1",		Mod1Mask,	0},
    {"Command",		Mod1Mask,	0},
    {"Mod2",		Mod2Mask,	0},
    {"M2",		Mod2Mask,	0},
    {"Option",		Mod2Mask,	0},
    {"Mod3",		Mod3Mask,	0},
    {"M3",		Mod3Mask,	0},
    {"Mod4",		Mod4Mask,	0},
    {"M4",		Mod4Mask,	0},
    {"Mod5",		Mod5Mask,	0},
    {"M5",		Mod5Mask,	0},
    {"Double",		0,		DOUBLE},
    {"Triple",		0,		TRIPLE},
    {"Quadruple",	0,		QUADRUPLE},
    {"Any",		0,		0},	/* Ignored: historical relic */
    {NULL,		0,		0}
};
static Tcl_HashTable modTable;

/*
 * This module also keeps a hash table mapping from event names to information
 * about those events. The structure, an array to use to initialize the hash
 * table, and the hash table are all defined below.
 */

typedef struct {
    const char *name;	/* Name of event. */
    int type;			/* Event type for X, such as ButtonPress. */
    int eventMask;		/* Mask bits (for XSelectInput) for this event
				 * type. */
} EventInfo;

/*
 * Note: some of the masks below are an OR-ed combination of several masks.
 * This is necessary because X doesn't report up events unless you also ask
 * for down events. Also, X doesn't report button state in motion events
 * unless you've asked about button events.
 */

static const EventInfo eventArray[] = {
    {"Key",		KeyPress,		KeyPressMask},
    {"KeyPress",	KeyPress,		KeyPressMask},
    {"KeyRelease",	KeyRelease,		KeyPressMask|KeyReleaseMask},
    {"Button",		ButtonPress,		ButtonPressMask},
    {"ButtonPress",	ButtonPress,		ButtonPressMask},
    {"ButtonRelease",	ButtonRelease,
	    ButtonPressMask|ButtonReleaseMask},
    {"Motion",		MotionNotify,
	    ButtonPressMask|PointerMotionMask},
    {"Enter",		EnterNotify,		EnterWindowMask},
    {"Leave",		LeaveNotify,		LeaveWindowMask},
    {"FocusIn",		FocusIn,		FocusChangeMask},
    {"FocusOut",	FocusOut,		FocusChangeMask},
    {"Expose",		Expose,			ExposureMask},
    {"Visibility",	VisibilityNotify,	VisibilityChangeMask},
    {"Destroy",		DestroyNotify,		StructureNotifyMask},
    {"Unmap",		UnmapNotify,		StructureNotifyMask},
    {"Map",		MapNotify,		StructureNotifyMask},
    {"Reparent",	ReparentNotify,		StructureNotifyMask},
    {"Configure",	ConfigureNotify,	StructureNotifyMask},
    {"Gravity",		GravityNotify,		StructureNotifyMask},
    {"Circulate",	CirculateNotify,	StructureNotifyMask},
    {"Property",	PropertyNotify,		PropertyChangeMask},
    {"Colormap",	ColormapNotify,		ColormapChangeMask},
    {"Activate",	ActivateNotify,		ActivateMask},
    {"Deactivate",	DeactivateNotify,	ActivateMask},
    {"MouseWheel",	MouseWheelEvent,	MouseWheelMask},
    {"CirculateRequest", CirculateRequest,	SubstructureRedirectMask},
    {"ConfigureRequest", ConfigureRequest,	SubstructureRedirectMask},
    {"Create",		CreateNotify,		SubstructureNotifyMask},
    {"MapRequest",	MapRequest,		SubstructureRedirectMask},
    {"ResizeRequest",	ResizeRequest,		ResizeRedirectMask},
    {NULL,		0,			0}
};
static Tcl_HashTable eventTable;

/*
 * The defines and table below are used to classify events into various
 * groups. The reason for this is that logically identical fields (e.g.
 * "state") appear at different places in different types of events. The
 * classification masks can be used to figure out quickly where to extract
 * information from events.
 */

#define KEY			0x1
#define BUTTON			0x2
#define MOTION			0x4
#define CROSSING		0x8
#define FOCUS			0x10
#define EXPOSE			0x20
#define VISIBILITY		0x40
#define CREATE			0x80
#define DESTROY			0x100
#define UNMAP			0x200
#define MAP			0x400
#define REPARENT		0x800
#define CONFIG			0x1000
#define GRAVITY			0x2000
#define CIRC			0x4000
#define PROP			0x8000
#define COLORMAP		0x10000
#define VIRTUAL			0x20000
#define ACTIVATE		0x40000
#define	MAPREQ			0x80000
#define	CONFIGREQ		0x100000
#define	RESIZEREQ		0x200000
#define CIRCREQ			0x400000

#define KEY_BUTTON_MOTION_VIRTUAL	(KEY|BUTTON|MOTION|VIRTUAL)
#define KEY_BUTTON_MOTION_CROSSING	(KEY|BUTTON|MOTION|VIRTUAL|CROSSING)

static const int flagArray[TK_LASTEVENT] = {
   /* Not used */		0,
   /* Not used */		0,
   /* KeyPress */		KEY,
   /* KeyRelease */		KEY,
   /* ButtonPress */		BUTTON,
   /* ButtonRelease */		BUTTON,
   /* MotionNotify */		MOTION,
   /* EnterNotify */		CROSSING,
   /* LeaveNotify */		CROSSING,
   /* FocusIn */		FOCUS,
   /* FocusOut */		FOCUS,
   /* KeymapNotify */		0,
   /* Expose */			EXPOSE,
   /* GraphicsExpose */		EXPOSE,
   /* NoExpose */		0,
   /* VisibilityNotify */	VISIBILITY,
   /* CreateNotify */		CREATE,
   /* DestroyNotify */		DESTROY,
   /* UnmapNotify */		UNMAP,
   /* MapNotify */		MAP,
   /* MapRequest */		MAPREQ,
   /* ReparentNotify */		REPARENT,
   /* ConfigureNotify */	CONFIG,
   /* ConfigureRequest */	CONFIGREQ,
   /* GravityNotify */		GRAVITY,
   /* ResizeRequest */		RESIZEREQ,
   /* CirculateNotify */	CIRC,
   /* CirculateRequest */	0,
   /* PropertyNotify */		PROP,
   /* SelectionClear */		0,
   /* SelectionRequest */	0,
   /* SelectionNotify */	0,
   /* ColormapNotify */		COLORMAP,
   /* ClientMessage */		0,
   /* MappingNotify */		0,
   /* VirtualEvent */		VIRTUAL,
   /* Activate */		ACTIVATE,
   /* Deactivate */		ACTIVATE,
   /* MouseWheel */		KEY
};

/*
 * The following table is used to map between the location where an generated
 * event should be queued and the string used to specify the location.
 */

static const TkStateMap queuePosition[] = {
    {-1,			"now"},
    {TCL_QUEUE_HEAD,		"head"},
    {TCL_QUEUE_MARK,		"mark"},
    {TCL_QUEUE_TAIL,		"tail"},
    {-2,			NULL}
};

/*
 * The following tables are used as a two-way map between X's internal numeric
 * values for fields in an XEvent and the strings used in Tcl. The tables are
 * used both when constructing an XEvent from user input and when providing
 * data from an XEvent to the user.
 */

static const TkStateMap notifyMode[] = {
    {NotifyNormal,		"NotifyNormal"},
    {NotifyGrab,		"NotifyGrab"},
    {NotifyUngrab,		"NotifyUngrab"},
    {NotifyWhileGrabbed,	"NotifyWhileGrabbed"},
    {-1, NULL}
};

static const TkStateMap notifyDetail[] = {
    {NotifyAncestor,		"NotifyAncestor"},
    {NotifyVirtual,		"NotifyVirtual"},
    {NotifyInferior,		"NotifyInferior"},
    {NotifyNonlinear,		"NotifyNonlinear"},
    {NotifyNonlinearVirtual,	"NotifyNonlinearVirtual"},
    {NotifyPointer,		"NotifyPointer"},
    {NotifyPointerRoot,		"NotifyPointerRoot"},
    {NotifyDetailNone,		"NotifyDetailNone"},
    {-1, NULL}
};

static const TkStateMap circPlace[] = {
    {PlaceOnTop,		"PlaceOnTop"},
    {PlaceOnBottom,		"PlaceOnBottom"},
    {-1, NULL}
};

static const TkStateMap visNotify[] = {
    {VisibilityUnobscured,	  "VisibilityUnobscured"},
    {VisibilityPartiallyObscured, "VisibilityPartiallyObscured"},
    {VisibilityFullyObscured,	  "VisibilityFullyObscured"},
    {-1, NULL}
};

static const TkStateMap configureRequestDetail[] = {
    {None,		"None"},
    {Above,		"Above"},
    {Below,		"Below"},
    {BottomIf,		"BottomIf"},
    {TopIf,		"TopIf"},
    {Opposite,		"Opposite"},
    {-1, NULL}
};

static const TkStateMap propNotify[] = {
    {PropertyNewValue,	"NewValue"},
    {PropertyDelete,	"Delete"},
    {-1, NULL}
};

/*
 * Prototypes for local functions defined in this file:
 */

static void		ChangeScreen(Tcl_Interp *interp, char *dispName,
			    int screenIndex);
static int		CreateVirtualEvent(Tcl_Interp *interp,
			    VirtualEventTable *vetPtr, char *virtString,
			    const char *eventString);
static int		DeleteVirtualEvent(Tcl_Interp *interp,
			    VirtualEventTable *vetPtr, char *virtString,
			    const char *eventString);
static void		DeleteVirtualEventTable(VirtualEventTable *vetPtr);
static void		ExpandPercents(TkWindow *winPtr, const char *before,
			    XEvent *eventPtr,KeySym keySym,Tcl_DString *dsPtr);
static PatSeq *		FindSequence(Tcl_Interp *interp,
			    Tcl_HashTable *patternTablePtr, ClientData object,
			    const char *eventString, int create,
			    int allowVirtual, unsigned long *maskPtr);
static void		GetAllVirtualEvents(Tcl_Interp *interp,
			    VirtualEventTable *vetPtr);
static char *		GetField(char *p, char *copy, int size);
static void		GetPatternString(PatSeq *psPtr, Tcl_DString *dsPtr);
static int		GetVirtualEvent(Tcl_Interp *interp,
			    VirtualEventTable *vetPtr, Tcl_Obj *virtName);
static Tk_Uid		GetVirtualEventUid(Tcl_Interp *interp,
			    char *virtString);
static int		HandleEventGenerate(Tcl_Interp *interp, Tk_Window main,
			    int objc, Tcl_Obj *const objv[]);
static void		InitVirtualEventTable(VirtualEventTable *vetPtr);
static PatSeq *		MatchPatterns(TkDisplay *dispPtr,
			    BindingTable *bindPtr, PatSeq *psPtr,
			    PatSeq *bestPtr, ClientData *objectPtr,
			    PatSeq **sourcePtrPtr);
static int		NameToWindow(Tcl_Interp *interp, Tk_Window main,
			    Tcl_Obj *objPtr, Tk_Window *tkwinPtr);
static int		ParseEventDescription(Tcl_Interp *interp,
			    const char **eventStringPtr, Pattern *patPtr,
			    unsigned long *eventMaskPtr);
static void		DoWarp(ClientData clientData);

/*
 *---------------------------------------------------------------------------
 *
 * TkBindInit --
 *
 *	This function is called when an application is created. It initializes
 *	all the structures used by bindings and virtual events. It must be
 *	called before any other functions in this file are called.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Memory allocated.
 *
 *---------------------------------------------------------------------------
 */

void
TkBindInit(
    TkMainInfo *mainPtr)	/* The newly created application. */
{
    BindInfo *bindInfoPtr;

    if (sizeof(XEvent) < sizeof(XVirtualEvent)) {
	Tcl_Panic("TkBindInit: virtual events can't be supported");
    }

    /*
     * Initialize the static data structures used by the binding package. They
     * are only initialized once, no matter how many interps are created.
     */

    if (!initialized) {
	Tcl_MutexLock(&bindMutex);
	if (!initialized) {
	    Tcl_HashEntry *hPtr;
	    const ModInfo *modPtr;
	    const EventInfo *eiPtr;
	    int newEntry;
#ifdef REDO_KEYSYM_LOOKUP
	    const KeySymInfo *kPtr;

	    Tcl_InitHashTable(&keySymTable, TCL_STRING_KEYS);
	    Tcl_InitHashTable(&nameTable, TCL_ONE_WORD_KEYS);
	    for (kPtr = keyArray; kPtr->name != NULL; kPtr++) {
		hPtr = Tcl_CreateHashEntry(&keySymTable, kPtr->name, &newEntry);
		Tcl_SetHashValue(hPtr, kPtr->value);
		hPtr = Tcl_CreateHashEntry(&nameTable, (char *) kPtr->value,
			&newEntry);
		if (newEntry) {
		    Tcl_SetHashValue(hPtr, kPtr->name);
		}
	    }
#endif /* REDO_KEYSYM_LOOKUP */

	    Tcl_InitHashTable(&modTable, TCL_STRING_KEYS);
	    for (modPtr = modArray; modPtr->name != NULL; modPtr++) {
		hPtr = Tcl_CreateHashEntry(&modTable, modPtr->name, &newEntry);
		Tcl_SetHashValue(hPtr, modPtr);
	    }

	    Tcl_InitHashTable(&eventTable, TCL_STRING_KEYS);
	    for (eiPtr = eventArray; eiPtr->name != NULL; eiPtr++) {
		hPtr = Tcl_CreateHashEntry(&eventTable, eiPtr->name, &newEntry);
		Tcl_SetHashValue(hPtr, eiPtr);
	    }
	    initialized = 1;
	}
	Tcl_MutexUnlock(&bindMutex);
    }

    mainPtr->bindingTable = Tk_CreateBindingTable(mainPtr->interp);

    bindInfoPtr = ckalloc(sizeof(BindInfo));
    InitVirtualEventTable(&bindInfoPtr->virtualEventTable);
    bindInfoPtr->screenInfo.curDispPtr = NULL;
    bindInfoPtr->screenInfo.curScreenIndex = -1;
    bindInfoPtr->screenInfo.bindingDepth = 0;
    bindInfoPtr->deleted = 0;
    mainPtr->bindInfo = bindInfoPtr;

    TkpInitializeMenuBindings(mainPtr->interp, mainPtr->bindingTable);
}

/*
 *---------------------------------------------------------------------------
 *
 * TkBindFree --
 *
 *	This function is called when an application is deleted. It deletes all
 *	the structures used by bindings and virtual events.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Memory freed.
 *
 *---------------------------------------------------------------------------
 */

void
TkBindFree(
    TkMainInfo *mainPtr)	/* The newly created application. */
{
    BindInfo *bindInfoPtr;

    Tk_DeleteBindingTable(mainPtr->bindingTable);
    mainPtr->bindingTable = NULL;

    bindInfoPtr = mainPtr->bindInfo;
    DeleteVirtualEventTable(&bindInfoPtr->virtualEventTable);
    bindInfoPtr->deleted = 1;
    Tcl_EventuallyFree(bindInfoPtr, TCL_DYNAMIC);
    mainPtr->bindInfo = NULL;
}

/*
 *--------------------------------------------------------------
 *
 * Tk_CreateBindingTable --
 *
 *	Set up a new domain in which event bindings may be created.
 *
 * Results:
 *	The return value is a token for the new table, which must be passed to
 *	functions like Tk_CreateBinding.
 *
 * Side effects:
 *	Memory is allocated for the new table.
 *
 *--------------------------------------------------------------
 */

Tk_BindingTable
Tk_CreateBindingTable(
    Tcl_Interp *interp)		/* Interpreter to associate with the binding
				 * table: commands are executed in this
				 * interpreter. */
{
    BindingTable *bindPtr = ckalloc(sizeof(BindingTable));
    int i;

    /*
     * Create and initialize a new binding table.
     */

    for (i = 0; i < EVENT_BUFFER_SIZE; i++) {
	bindPtr->eventRing[i].type = -1;
    }
    bindPtr->curEvent = 0;
    Tcl_InitHashTable(&bindPtr->patternTable,
	    sizeof(PatternTableKey)/sizeof(int));
    Tcl_InitHashTable(&bindPtr->objectTable, TCL_ONE_WORD_KEYS);
    bindPtr->interp = interp;
    return bindPtr;
}

/*
 *--------------------------------------------------------------
 *
 * Tk_DeleteBindingTable --
 *
 *	Destroy a binding table and free up all its memory. The caller should
 *	not use bindingTable again after this function returns.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Memory is freed.
 *
 *--------------------------------------------------------------
 */

void
Tk_DeleteBindingTable(
    Tk_BindingTable bindPtr)	/* Token for the binding table to destroy. */
{
    PatSeq *psPtr, *nextPtr;
    Tcl_HashEntry *hPtr;
    Tcl_HashSearch search;

    /*
     * Find and delete all of the patterns associated with the binding table.
     */

    for (hPtr = Tcl_FirstHashEntry(&bindPtr->patternTable, &search);
	    hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
	for (psPtr = Tcl_GetHashValue(hPtr); psPtr != NULL; psPtr = nextPtr) {
	    nextPtr = psPtr->nextSeqPtr;
	    ckfree(psPtr->script);
	    ckfree(psPtr);
	}
    }

    /*
     * Clean up the rest of the information associated with the binding table.
     */

    Tcl_DeleteHashTable(&bindPtr->patternTable);
    Tcl_DeleteHashTable(&bindPtr->objectTable);
    ckfree(bindPtr);
}

/*
 *--------------------------------------------------------------
 *
 * Tk_CreateBinding --
 *
 *	Add a binding to a binding table, so that future calls to Tk_BindEvent
 *	may execute the command in the binding.
 *
 * Results:
 *	The return value is 0 if an error occurred while setting up the
 *	binding. In this case, an error message will be left in the interp's
 *	result. If all went well then the return value is a mask of the event
 *	types that must be made available to Tk_BindEvent in order to properly
 *	detect when this binding triggers. This value can be used to determine
 *	what events to select for in a window, for example.
 *
 * Side effects:
 *	An existing binding on the same event sequence may be replaced. The
 *	new binding may cause future calls to Tk_BindEvent to behave
 *	differently than they did previously.
 *
 *--------------------------------------------------------------
 */

unsigned long
Tk_CreateBinding(
    Tcl_Interp *interp,		/* Used for error reporting. */
    Tk_BindingTable bindPtr,	/* Table in which to create binding. */
    ClientData object,		/* Token for object with which binding is
				 * associated. */
    const char *eventString,	/* String describing event sequence that
				 * triggers binding. */
    const char *script,		/* Contains Tcl script to execute when
				 * binding triggers. */
    int append)			/* 0 means replace any existing binding for
				 * eventString; 1 means append to that
				 * binding. If the existing binding is for a
				 * callback function and not a Tcl command
				 * string, the existing binding will always be
				 * replaced. */
{
    PatSeq *psPtr;
    unsigned long eventMask;
    char *newStr, *oldStr;

    if (!*script) {
	/* Silently ignore empty scripts -- see SF#3006842 */
	return 1;
    }
    psPtr = FindSequence(interp, &bindPtr->patternTable, object, eventString,
	    1, 1, &eventMask);
    if (psPtr == NULL) {
	return 0;
    }
    if (psPtr->script == NULL) {
	int isNew;
	Tcl_HashEntry *hPtr;

	/*
	 * This pattern sequence was just created. Link the pattern into the
	 * list associated with the object, so that if the object goes away,
	 * these bindings will all automatically be deleted.
	 */

	hPtr = Tcl_CreateHashEntry(&bindPtr->objectTable, (char *) object,
		&isNew);
	if (isNew) {
	    psPtr->nextObjPtr = NULL;
	} else {
	    psPtr->nextObjPtr = Tcl_GetHashValue(hPtr);
	}
	Tcl_SetHashValue(hPtr, psPtr);
    }

    oldStr = psPtr->script;
    if ((append != 0) && (oldStr != NULL)) {
	size_t length1 = strlen(oldStr), length2 = strlen(script);

	newStr = ckalloc(length1 + length2 + 2);
	memcpy(newStr, oldStr, length1);
	newStr[length1] = '\n';
	memcpy(newStr+length1+1, script, length2+1);
    } else {
	size_t length = strlen(script);

	newStr = ckalloc(length + 1);
	memcpy(newStr, script, length+1);
    }
    if (oldStr != NULL) {
	ckfree(oldStr);
    }
    psPtr->script = newStr;
    return eventMask;
}

/*
 *--------------------------------------------------------------
 *
 * Tk_DeleteBinding --
 *
 *	Remove an event binding from a binding table.
 *
 * Results:
 *	The result is a standard Tcl return value. If an error occurs then the
 *	interp's result will contain an error message.
 *
 * Side effects:
 *	The binding given by object and eventString is removed from
 *	bindingTable.
 *
 *--------------------------------------------------------------
 */

int
Tk_DeleteBinding(
    Tcl_Interp *interp,		/* Used for error reporting. */
    Tk_BindingTable bindPtr,	/* Table in which to delete binding. */
    ClientData object,		/* Token for object with which binding is
				 * associated. */
    const char *eventString)	/* String describing event sequence that
				 * triggers binding. */
{
    PatSeq *psPtr, *prevPtr;
    unsigned long eventMask;
    Tcl_HashEntry *hPtr;

    psPtr = FindSequence(interp, &bindPtr->patternTable, object, eventString,
	    0, 1, &eventMask);
    if (psPtr == NULL) {
	Tcl_ResetResult(interp);
	return TCL_OK;
    }

    /*
     * Unlink the binding from the list for its object, then from the list for
     * its pattern.
     */

    hPtr = Tcl_FindHashEntry(&bindPtr->objectTable, (char *) object);
    if (hPtr == NULL) {
	Tcl_Panic("Tk_DeleteBinding couldn't find object table entry");
    }
    prevPtr = Tcl_GetHashValue(hPtr);
    if (prevPtr == psPtr) {
	Tcl_SetHashValue(hPtr, psPtr->nextObjPtr);
    } else {
	for ( ; ; prevPtr = prevPtr->nextObjPtr) {
	    if (prevPtr == NULL) {
		Tcl_Panic("Tk_DeleteBinding couldn't find on object list");
	    }
	    if (prevPtr->nextObjPtr == psPtr) {
		prevPtr->nextObjPtr = psPtr->nextObjPtr;
		break;
	    }
	}
    }
    prevPtr = Tcl_GetHashValue(psPtr->hPtr);
    if (prevPtr == psPtr) {
	if (psPtr->nextSeqPtr == NULL) {
	    Tcl_DeleteHashEntry(psPtr->hPtr);
	} else {
	    Tcl_SetHashValue(psPtr->hPtr, psPtr->nextSeqPtr);
	}
    } else {
	for ( ; ; prevPtr = prevPtr->nextSeqPtr) {
	    if (prevPtr == NULL) {
		Tcl_Panic("Tk_DeleteBinding couldn't find on hash chain");
	    }
	    if (prevPtr->nextSeqPtr == psPtr) {
		prevPtr->nextSeqPtr = psPtr->nextSeqPtr;
		break;
	    }
	}
    }

    ckfree(psPtr->script);
    ckfree(psPtr);
    return TCL_OK;
}

/*
 *--------------------------------------------------------------
 *
 * Tk_GetBinding --
 *
 *	Return the script associated with a given event string.
 *
 * Results:
 *	The return value is a pointer to the script associated with
 *	eventString for object in the domain given by bindingTable. If there
 *	is no binding for eventString, or if eventString is improperly formed,
 *	then NULL is returned and an error message is left in the interp's
 *	result. The return value is semi-static: it will persist until the
 *	binding is changed or deleted.
 *
 * Side effects:
 *	None.
 *
 *--------------------------------------------------------------
 */

const char *
Tk_GetBinding(
    Tcl_Interp *interp,		/* Interpreter for error reporting. */
    Tk_BindingTable bindPtr,	/* Table in which to look for binding. */
    ClientData object,		/* Token for object with which binding is
				 * associated. */
    const char *eventString)	/* String describing event sequence that
				 * triggers binding. */
{
    PatSeq *psPtr;
    unsigned long eventMask;

    psPtr = FindSequence(interp, &bindPtr->patternTable, object, eventString,
	    0, 1, &eventMask);
    if (psPtr == NULL) {
	return NULL;
    }
    return psPtr->script;
}

/*
 *--------------------------------------------------------------
 *
 * Tk_GetAllBindings --
 *
 *	Return a list of event strings for all the bindings associated with a
 *	given object.
 *
 * Results:
 *	There is no return value. The interp's result is modified to hold a
 *	Tcl list with one entry for each binding associated with object in
 *	bindingTable. Each entry in the list contains the event string
 *	associated with one binding.
 *
 * Side effects:
 *	None.
 *
 *--------------------------------------------------------------
 */

void
Tk_GetAllBindings(
    Tcl_Interp *interp,		/* Interpreter returning result or error. */
    Tk_BindingTable bindPtr,	/* Table in which to look for bindings. */
    ClientData object)		/* Token for object. */
{
    PatSeq *psPtr;
    Tcl_HashEntry *hPtr;
    Tcl_DString ds;

    hPtr = Tcl_FindHashEntry(&bindPtr->objectTable, (char *) object);
    if (hPtr == NULL) {
	return;
    }
    Tcl_DStringInit(&ds);
    for (psPtr = Tcl_GetHashValue(hPtr); psPtr != NULL;
	    psPtr = psPtr->nextObjPtr) {
	/*
	 * For each binding, output information about each of the patterns in
	 * its sequence.
	 */

	Tcl_DStringSetLength(&ds, 0);
	GetPatternString(psPtr, &ds);
	Tcl_AppendElement(interp, Tcl_DStringValue(&ds));
    }
    Tcl_DStringFree(&ds);
}

/*
 *--------------------------------------------------------------
 *
 * Tk_DeleteAllBindings --
 *
 *	Remove all bindings associated with a given object in a given binding
 *	table.
 *
 * Results:
 *	All bindings associated with object are removed from bindingTable.
 *
 * Side effects:
 *	None.
 *
 *--------------------------------------------------------------
 */

void
Tk_DeleteAllBindings(
    Tk_BindingTable bindPtr,	/* Table in which to delete bindings. */
    ClientData object)		/* Token for object. */
{
    PatSeq *psPtr, *prevPtr;
    PatSeq *nextPtr;
    Tcl_HashEntry *hPtr;

    hPtr = Tcl_FindHashEntry(&bindPtr->objectTable, (char *) object);
    if (hPtr == NULL) {
	return;
    }
    for (psPtr = Tcl_GetHashValue(hPtr); psPtr != NULL;
	    psPtr = nextPtr) {
	nextPtr = psPtr->nextObjPtr;

	/*
	 * Be sure to remove each binding from its hash chain in the pattern
	 * table. If this is the last pattern in the chain, then delete the
	 * hash entry too.
	 */

	prevPtr = Tcl_GetHashValue(psPtr->hPtr);
	if (prevPtr == psPtr) {
	    if (psPtr->nextSeqPtr == NULL) {
		Tcl_DeleteHashEntry(psPtr->hPtr);
	    } else {
		Tcl_SetHashValue(psPtr->hPtr, psPtr->nextSeqPtr);
	    }
	} else {
	    for ( ; ; prevPtr = prevPtr->nextSeqPtr) {
		if (prevPtr == NULL) {
		    Tcl_Panic("Tk_DeleteAllBindings couldn't find on hash chain");
		}
		if (prevPtr->nextSeqPtr == psPtr) {
		    prevPtr->nextSeqPtr = psPtr->nextSeqPtr;
		    break;
		}
	    }
	}
	ckfree(psPtr->script);
	ckfree(psPtr);
    }
    Tcl_DeleteHashEntry(hPtr);
}

/*
 *---------------------------------------------------------------------------
 *
 * Tk_BindEvent --
 *
 *	This function is invoked to process an X event. The event is added to
 *	those recorded for the binding table. Then each of the objects at
 *	*objectPtr is checked in order to see if it has a binding that matches
 *	the recent events. If so, the most specific binding is invoked for
 *	each object.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Depends on the script associated with the matching binding.
 *
 *	All Tcl binding scripts for each object are accumulated before the
 *	first binding is evaluated. If the action of a Tcl binding is to
 *	change or delete a binding, or delete the window associated with the
 *	binding, all the original Tcl binding scripts will still fire.
 *
 *---------------------------------------------------------------------------
 */

void
Tk_BindEvent(
    Tk_BindingTable bindPtr,	/* Table in which to look for bindings. */
    XEvent *eventPtr,		/* What actually happened. */
    Tk_Window tkwin,		/* Window on display where event occurred
				 * (needed in order to locate display
				 * information). */
    int numObjects,		/* Number of objects at *objectPtr. */
    ClientData *objectPtr)	/* Array of one or more objects to check for a
				 * matching binding. */
{
    TkDisplay *dispPtr;
    ScreenInfo *screenPtr;
    BindInfo *bindInfoPtr;
    TkDisplay *oldDispPtr;
    XEvent *ringPtr;
    PatSeq *vMatchDetailList, *vMatchNoDetailList;
    int flags, oldScreen;
    Tcl_Interp *interp;
    Tcl_DString scripts, savedResult;
    Detail detail;
    char *p, *end;
    TkWindow *winPtr = (TkWindow *) tkwin;
    PatternTableKey key;

    /*
     * Ignore events on windows that don't have names: these are windows like
     * wrapper windows that shouldn't be visible to the application.
     */

    if (winPtr->pathName == NULL) {
	return;
    }

    /*
     * Ignore the event completely if it is an Enter, Leave, FocusIn, or
     * FocusOut event with detail NotifyInferior. The reason for ignoring
     * these events is that we don't want transitions between a window and its
     * children to visible to bindings on the parent: this would cause
     * problems for mega-widgets, since the internal structure of a
     * mega-widget isn't supposed to be visible to people watching the parent.
     */

    if ((eventPtr->type == EnterNotify) || (eventPtr->type == LeaveNotify)) {
	if (eventPtr->xcrossing.detail == NotifyInferior) {
	    return;
	}
    }
    if ((eventPtr->type == FocusIn) || (eventPtr->type == FocusOut)) {
	if (eventPtr->xfocus.detail == NotifyInferior) {
	    return;
	}
    }

    dispPtr = ((TkWindow *) tkwin)->dispPtr;
    bindInfoPtr = winPtr->mainPtr->bindInfo;

    /*
     * Add the new event to the ring of saved events for the binding table.
     * Two tricky points:
     *
     * 1. Combine consecutive MotionNotify events. Do this by putting the new
     *    event *on top* of the previous event.
     * 2. If a modifier key is held down, it auto-repeats to generate
     *    continuous KeyPress and KeyRelease events. These can flush the event
     *    ring so that valuable information is lost (such as repeated button
     *    clicks). To handle this, check for the special case of a modifier
     *    KeyPress arriving when the previous two events are a KeyRelease and
     *    KeyPress of the same key. If this happens, mark the most recent
     *    event (the KeyRelease) invalid and put the new event on top of the
     *    event before that (the KeyPress).
     */

    if ((eventPtr->type == MotionNotify)
	    && (bindPtr->eventRing[bindPtr->curEvent].type == MotionNotify)) {
	/*
	 * Don't advance the ring pointer.
	 */
    } else if (eventPtr->type == KeyPress) {
	int i;

	for (i = 0; ; i++) {
	    if (i >= dispPtr->numModKeyCodes) {
		goto advanceRingPointer;
	    }
	    if (dispPtr->modKeyCodes[i] == eventPtr->xkey.keycode) {
		break;
	    }
	}
	ringPtr = &bindPtr->eventRing[bindPtr->curEvent];
	if ((ringPtr->type != KeyRelease)
		|| (ringPtr->xkey.keycode != eventPtr->xkey.keycode)) {
	    goto advanceRingPointer;
	}
	if (bindPtr->curEvent <= 0) {
	    i = EVENT_BUFFER_SIZE - 1;
	} else {
	    i = bindPtr->curEvent - 1;
	}
	ringPtr = &bindPtr->eventRing[i];
	if ((ringPtr->type != KeyPress)
		|| (ringPtr->xkey.keycode != eventPtr->xkey.keycode)) {
	    goto advanceRingPointer;
	}
	bindPtr->eventRing[bindPtr->curEvent].type = -1;
	bindPtr->curEvent = i;
    } else {

    advanceRingPointer:
	bindPtr->curEvent++;
	if (bindPtr->curEvent >= EVENT_BUFFER_SIZE) {
	    bindPtr->curEvent = 0;
	}
    }
    ringPtr = &bindPtr->eventRing[bindPtr->curEvent];
    memcpy(ringPtr, eventPtr, sizeof(XEvent));
    detail.clientData = 0;
    flags = flagArray[ringPtr->type];
    if (flags & KEY) {
	detail.keySym = TkpGetKeySym(dispPtr, ringPtr);
	if (detail.keySym == NoSymbol) {
	    detail.keySym = 0;
	}
    } else if (flags & BUTTON) {
	detail.button = ringPtr->xbutton.button;
    } else if (flags & VIRTUAL) {
	detail.name = ((XVirtualEvent *) ringPtr)->name;
    }
    bindPtr->detailRing[bindPtr->curEvent] = detail;

    /*
     * Find out if there are any virtual events that correspond to this
     * physical event (or sequence of physical events).
     */

    vMatchDetailList = NULL;
    vMatchNoDetailList = NULL;
    memset(&key, 0, sizeof(key));

    if (ringPtr->type != VirtualEvent) {
	Tcl_HashTable *veptPtr = &bindInfoPtr->virtualEventTable.patternTable;
	Tcl_HashEntry *hPtr;

	key.object = NULL;
	key.type = ringPtr->type;
	key.detail = detail;

	hPtr = Tcl_FindHashEntry(veptPtr, (char *) &key);
	if (hPtr != NULL) {
	    vMatchDetailList = Tcl_GetHashValue(hPtr);
	}

	if (key.detail.clientData != 0) {
	    key.detail.clientData = 0;
	    hPtr = Tcl_FindHashEntry(veptPtr, (char *) &key);
	    if (hPtr != NULL) {
		vMatchNoDetailList = Tcl_GetHashValue(hPtr);
	    }
	}
    }

    /*
     * Loop over all the binding tags, finding the binding script or callback
     * for each one. Append all of the binding scripts, with %-sequences
     * expanded, to "scripts", with null characters separating the scripts for
     * each object.
     */

    Tcl_DStringInit(&scripts);

    for ( ; numObjects > 0; numObjects--, objectPtr++) {
	PatSeq *matchPtr = NULL, *sourcePtr = NULL;
	Tcl_HashEntry *hPtr;

	/*
	 * Match the new event against those recorded in the pattern table,
	 * saving the longest matching pattern. For events with details
	 * (button and key events), look for a binding for the specific key or
	 * button. First see if the event matches a physical event that the
	 * object is interested in, then look for a virtual event.
	 */

	key.object = *objectPtr;
	key.type = ringPtr->type;
	key.detail = detail;
	hPtr = Tcl_FindHashEntry(&bindPtr->patternTable, (char *) &key);
	if (hPtr != NULL) {
	    matchPtr = MatchPatterns(dispPtr, bindPtr, Tcl_GetHashValue(hPtr),
		    matchPtr, NULL, &sourcePtr);
	}

	if (vMatchDetailList != NULL) {
	    matchPtr = MatchPatterns(dispPtr, bindPtr, vMatchDetailList,
		    matchPtr, objectPtr, &sourcePtr);
	}

	/*
	 * If no match was found, look for a binding for all keys or buttons
	 * (detail of 0). Again, first match on a virtual event.
	 */

	if ((detail.clientData != 0) && (matchPtr == NULL)) {
	    key.detail.clientData = 0;
	    hPtr = Tcl_FindHashEntry(&bindPtr->patternTable, (char *) &key);
	    if (hPtr != NULL) {
		matchPtr = MatchPatterns(dispPtr, bindPtr,
			Tcl_GetHashValue(hPtr), matchPtr, NULL, &sourcePtr);
	    }

	    if (vMatchNoDetailList != NULL) {
		matchPtr = MatchPatterns(dispPtr, bindPtr, vMatchNoDetailList,
			matchPtr, objectPtr, &sourcePtr);
	    }
	}

	if (matchPtr != NULL) {
	    ExpandPercents(winPtr, sourcePtr->script, eventPtr,
		    detail.keySym, &scripts);

	    /*
	     * A "" is added to the scripts string to separate the various
	     * scripts that should be invoked.
	     */

	    Tcl_DStringAppend(&scripts, "", 1);
	}
    }
    if (Tcl_DStringLength(&scripts) == 0) {
	return;
    }

    /*
     * Now go back through and evaluate the binding for each object, in order,
     * dealing with "break" and "continue" exceptions appropriately.
     *
     * There are two tricks here:
     * 1. Bindings can be invoked from in the middle of Tcl commands, where
     *    the interp's result is significant (for example, a widget might be
     *    deleted because of an error in creating it, so the result contains
     *    an error message that is eventually going to be returned by the
     *    creating command). To preserve the result, we save it in a dynamic
     *    string.
     * 2. The binding's action can potentially delete the binding, so bindPtr
     *    may not point to anything valid once the action completes. Thus we
     *    have to save bindPtr->interp in a local variable in order to restore
     *    the result.
     */

    interp = bindPtr->interp;
    Tcl_DStringInit(&savedResult);

    /*
     * Save information about the current screen, then invoke a script if the
     * screen has changed.
     */

    Tcl_DStringGetResult(interp, &savedResult);
    screenPtr = &bindInfoPtr->screenInfo;
    oldDispPtr = screenPtr->curDispPtr;
    oldScreen = screenPtr->curScreenIndex;
    if ((dispPtr != screenPtr->curDispPtr)
	    || (Tk_ScreenNumber(tkwin) != screenPtr->curScreenIndex)) {
	screenPtr->curDispPtr = dispPtr;
	screenPtr->curScreenIndex = Tk_ScreenNumber(tkwin);
	ChangeScreen(interp, dispPtr->name, screenPtr->curScreenIndex);
    }

    p = Tcl_DStringValue(&scripts);
    end = p + Tcl_DStringLength(&scripts);

    /*
     * Be carefule when dereferencing screenPtr or bindInfoPtr. If we evaluate
     * something that destroys ".", bindInfoPtr would have been freed, but we
     * can tell that by first checking to see if winPtr->mainPtr == NULL.
     */

    Tcl_Preserve(bindInfoPtr);
    while (p < end) {
	int len = (int) strlen(p);
	int code;

	if (!bindInfoPtr->deleted) {
	    screenPtr->bindingDepth++;
	}
	Tcl_AllowExceptions(interp);

	code = Tcl_EvalEx(interp, p, len, TCL_EVAL_GLOBAL);
	p += len + 1;

	if (!bindInfoPtr->deleted) {
	    screenPtr->bindingDepth--;
	}
	if (code != TCL_OK) {
	    if (code == TCL_CONTINUE) {
		/*
		 * Do nothing: just go on to the next command.
		 */
	    } else if (code == TCL_BREAK) {
		break;
	    } else {
		Tcl_AddErrorInfo(interp, "\n    (command bound to event)");
		Tcl_BackgroundException(interp, code);
		break;
	    }
	}
    }

    if (!bindInfoPtr->deleted && (screenPtr->bindingDepth != 0)
	    && ((oldDispPtr != screenPtr->curDispPtr)
		    || (oldScreen != screenPtr->curScreenIndex))) {
	/*
	 * Some other binding script is currently executing, but its screen is
	 * no longer current. Change the current display back again.
	 */

	screenPtr->curDispPtr = oldDispPtr;
	screenPtr->curScreenIndex = oldScreen;
	ChangeScreen(interp, oldDispPtr->name, oldScreen);
    }
    Tcl_DStringResult(interp, &savedResult);
    Tcl_DStringFree(&scripts);

    Tcl_Release(bindInfoPtr);
}

/*
 *----------------------------------------------------------------------
 *
 * MatchPatterns --
 *
 *	Given a list of pattern sequences and a list of recent events, return
 *	the pattern sequence that best matches the event list, if there is
 *	one.
 *
 *	This function is used in two different ways. In the simplest use,
 *	"object" is NULL and psPtr is a list of pattern sequences, each of
 *	which corresponds to a binding. In this case, the function finds the
 *	pattern sequences that match the event list and returns the most
 *	specific of those, if there is more than one.
 *
 *	In the second case, psPtr is a list of pattern sequences, each of
 *	which corresponds to a definition for a virtual binding. In order for
 *	one of these sequences to "match", it must match the events (as above)
 *	but in addition there must be a binding for its associated virtual
 *	event on the current object. The "object" argument indicates which
 *	object the binding must be for.
 *
 * Results:

 *	The return value is NULL if bestPtr is NULL and no pattern matches the
 *	recent events from bindPtr. Otherwise the return value is the most
 *	specific pattern sequence among bestPtr and all those at psPtr that
 *	match the event list and object. If a pattern sequence other than
 *	bestPtr is returned, then *bestCommandPtr is filled in with a pointer
 *	to the command from the best sequence.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

static PatSeq *
MatchPatterns(
    TkDisplay *dispPtr,		/* Display from which the event came. */
    BindingTable *bindPtr,	/* Information about binding table, such as
				 * ring of recent events. */
    PatSeq *psPtr,		/* List of pattern sequences. */
    PatSeq *bestPtr,		/* The best match seen so far, from a previous
				 * call to this function. NULL means no prior
				 * best match. */
    ClientData *objectPtr,	/* If NULL, the sequences at psPtr correspond
				 * to "normal" bindings. If non-NULL, the
				 * sequences at psPtr correspond to virtual
				 * bindings; in order to match each sequence
				 * must correspond to a virtual binding for
				 * which a binding exists for object in
				 * bindPtr. */
    PatSeq **sourcePtrPtr)	/* Filled with the pattern sequence that
				 * contains the eventProc and clientData
				 * associated with the best match. If this
				 * differs from the return value, it is the
				 * virtual event that most closely matched the
				 * return value (a physical event). Not
				 * modified unless a result other than bestPtr
				 * is returned. */
{
    PatSeq *matchPtr, *bestSourcePtr, *sourcePtr;

    bestSourcePtr = *sourcePtrPtr;

    /*
     * Iterate over all the pattern sequences.
     */

    for ( ; psPtr != NULL; psPtr = psPtr->nextSeqPtr) {
	XEvent *eventPtr = &bindPtr->eventRing[bindPtr->curEvent];
	Detail *detailPtr = &bindPtr->detailRing[bindPtr->curEvent];
	Pattern *patPtr = psPtr->pats;
	Window window = eventPtr->xany.window;
	int patCount, ringCount, flags, state, modMask, i;

	/*
	 * Iterate over all the patterns in a sequence to be sure that they
	 * all match.
	 */

	patCount = psPtr->numPats;
	ringCount = EVENT_BUFFER_SIZE;
	while (patCount > 0) {
	    if (ringCount <= 0) {
		goto nextSequence;
	    }
	    if (eventPtr->xany.type != patPtr->eventType) {
		/*
		 * Most of the event types are considered superfluous in that
		 * they are ignored if they occur in the middle of a pattern
		 * sequence and have mismatching types. The only ones that
		 * cannot be ignored are ButtonPress and ButtonRelease events
		 * (if the next event in the pattern is a KeyPress or
		 * KeyRelease) and KeyPress and KeyRelease events (if the next
		 * pattern event is a ButtonPress or ButtonRelease). Here are
		 * some tricky cases to consider:
		 * 1. Double-Button or Double-Key events.
		 * 2. Double-ButtonRelease or Double-KeyRelease events.
		 * 3. The arrival of various events like Enter and Leave and
		 *    FocusIn and GraphicsExpose between two button presses or
		 *    key presses.
		 * 4. Modifier keys like Shift and Control shouldn't generate
		 *    conflicts with button events.
		 */

		if ((patPtr->eventType == KeyPress)
			|| (patPtr->eventType == KeyRelease)) {
		    if ((eventPtr->xany.type == ButtonPress)
			    || (eventPtr->xany.type == ButtonRelease)) {
			goto nextSequence;
		    }
		} else if ((patPtr->eventType == ButtonPress)
			|| (patPtr->eventType == ButtonRelease)) {
		    if ((eventPtr->xany.type == KeyPress)
			    || (eventPtr->xany.type == KeyRelease)) {
			/*
			 * Ignore key events if they are modifier keys.
			 */

			for (i = 0; i < dispPtr->numModKeyCodes; i++) {
			    if (dispPtr->modKeyCodes[i]
				    == eventPtr->xkey.keycode) {
				/*
				 * This key is a modifier key, so ignore it.
				 */

				goto nextEvent;
			    }
			}
			goto nextSequence;
		    }
		}
		goto nextEvent;
	    }
	    if (eventPtr->xany.type == CreateNotify
		    && eventPtr->xcreatewindow.parent != window) {
		goto nextSequence;
	    } else if (eventPtr->xany.window != window) {
		goto nextSequence;
	    }

	    /*
	     * Note: it's important for the keysym check to go before the
	     * modifier check, so we can ignore unwanted modifier keys before
	     * choking on the modifier check.
	     */

	    if ((patPtr->detail.clientData != 0)
		    && (patPtr->detail.clientData != detailPtr->clientData)) {
		/*
		 * The detail appears not to match. However, if the event is a
		 * KeyPress for a modifier key then just ignore the event.
		 * Otherwise event sequences like "aD" never match because the
		 * shift key goes down between the "a" and the "D".
		 */

		if (eventPtr->xany.type == KeyPress) {
		    for (i = 0; i < dispPtr->numModKeyCodes; i++) {
			if (dispPtr->modKeyCodes[i] == eventPtr->xkey.keycode) {
			    goto nextEvent;
			}
		    }
		}
		goto nextSequence;
	    }
	    flags = flagArray[eventPtr->type];
	    if (flags & KEY_BUTTON_MOTION_VIRTUAL) {
		state = eventPtr->xkey.state;
	    } else if (flags & CROSSING) {
		state = eventPtr->xcrossing.state;
	    } else {
		state = 0;
	    }
	    if (patPtr->needMods != 0) {
		modMask = patPtr->needMods;
		if ((modMask & META_MASK) && (dispPtr->metaModMask != 0)) {
		    modMask = (modMask & ~META_MASK) | dispPtr->metaModMask;
		}
		if ((modMask & ALT_MASK) && (dispPtr->altModMask != 0)) {
		    modMask = (modMask & ~ALT_MASK) | dispPtr->altModMask;
		}

		if ((state & META_MASK) && (dispPtr->metaModMask != 0)) {
		    state = (state & ~META_MASK) | dispPtr->metaModMask;
		}
		if ((state & ALT_MASK) && (dispPtr->altModMask != 0)) {
		    state = (state & ~ALT_MASK) | dispPtr->altModMask;
		}

		if ((state & modMask) != modMask) {
		    goto nextSequence;
		}
	    }
	    if (psPtr->flags & PAT_NEARBY) {
		XEvent *firstPtr = &bindPtr->eventRing[bindPtr->curEvent];
		int timeDiff;

		timeDiff = (Time) firstPtr->xkey.time - eventPtr->xkey.time;
		if ((firstPtr->xkey.x_root
			    < (eventPtr->xkey.x_root - NEARBY_PIXELS))
			|| (firstPtr->xkey.x_root
			    > (eventPtr->xkey.x_root + NEARBY_PIXELS))
			|| (firstPtr->xkey.y_root
			    < (eventPtr->xkey.y_root - NEARBY_PIXELS))
			|| (firstPtr->xkey.y_root
			    > (eventPtr->xkey.y_root + NEARBY_PIXELS))
			|| (timeDiff > NEARBY_MS)) {
		    goto nextSequence;
		}
	    }
	    patPtr++;
	    patCount--;
	nextEvent:
	    if (eventPtr == bindPtr->eventRing) {
		eventPtr = &bindPtr->eventRing[EVENT_BUFFER_SIZE-1];
		detailPtr = &bindPtr->detailRing[EVENT_BUFFER_SIZE-1];
	    } else {
		eventPtr--;
		detailPtr--;
	    }
	    ringCount--;
	}

	matchPtr = psPtr;
	sourcePtr = psPtr;

	if (objectPtr != NULL) {
	    int iVirt;
	    VirtualOwners *voPtr;
	    PatternTableKey key;

	    /*
	     * The sequence matches the physical constraints. Is this object
	     * interested in any of the virtual events that correspond to this
	     * sequence?
	     */

	    voPtr = psPtr->voPtr;

	    memset(&key, 0, sizeof(key));
	    key.object = *objectPtr;
	    key.type = VirtualEvent;
	    key.detail.clientData = 0;

	    for (iVirt = 0; iVirt < voPtr->numOwners; iVirt++) {
		Tcl_HashEntry *hPtr = voPtr->owners[iVirt];

		key.detail.name = (Tk_Uid) Tcl_GetHashKey(hPtr->tablePtr,
			hPtr);
		hPtr = Tcl_FindHashEntry(&bindPtr->patternTable,
			(char *) &key);
		if (hPtr != NULL) {
		    /*
		     * This tag is interested in this virtual event and its
		     * corresponding physical event is a good match with the
		     * virtual event's definition.
		     */

		    PatSeq *virtMatchPtr = Tcl_GetHashValue(hPtr);

		    if ((virtMatchPtr->numPats != 1)
			    || (virtMatchPtr->nextSeqPtr != NULL)) {
			Tcl_Panic("MatchPattern: badly constructed virtual event");
		    }
		    sourcePtr = virtMatchPtr;
		    goto match;
		}
	    }

	    /*
	     * The physical event matches a virtual event's definition, but
	     * the tag isn't interested in it.
	     */

	    goto nextSequence;
	}
    match:

	/*
	 * This sequence matches. If we've already got another match, pick
	 * whichever is most specific. Detail is most important, then
	 * needMods.
	 */

	if (bestPtr != NULL) {
	    Pattern *patPtr2;

	    if (matchPtr->numPats != bestPtr->numPats) {
		if (bestPtr->numPats > matchPtr->numPats) {
		    goto nextSequence;
		} else {
		    goto newBest;
		}
	    }
	    for (i = 0, patPtr = matchPtr->pats, patPtr2 = bestPtr->pats;
		    i < matchPtr->numPats; i++, patPtr++, patPtr2++) {
		if (patPtr->detail.clientData != patPtr2->detail.clientData) {
		    if (patPtr->detail.clientData == 0) {
			goto nextSequence;
		    } else {
			goto newBest;
		    }
		}
		if (patPtr->needMods != patPtr2->needMods) {
		    if ((patPtr->needMods & patPtr2->needMods)
			    == patPtr->needMods) {
			goto nextSequence;
		    } else if ((patPtr->needMods & patPtr2->needMods)
			    == patPtr2->needMods) {
			goto newBest;
		    }
		}
	    }

	    /*
	     * Tie goes to current best pattern.
	     *
	     * (1) For virtual vs. virtual, the least recently defined virtual
	     * wins, because virtuals are examined in order of definition.
	     * This order is _not_ guaranteed in the documentation.
	     *
	     * (2) For virtual vs. physical, the physical wins because all the
	     * physicals are examined before the virtuals. This order is
	     * guaranteed in the documentation.
	     *
	     * (3) For physical vs. physical pattern, the most recently
	     * defined physical wins, because physicals are examined in
	     * reverse order of definition. This order is guaranteed in the
	     * documentation.
	     */

	    goto nextSequence;
	}
    newBest:
	bestPtr = matchPtr;
	bestSourcePtr = sourcePtr;

    nextSequence:
	continue;
    }

    *sourcePtrPtr = bestSourcePtr;
    return bestPtr;
}

/*
 *--------------------------------------------------------------
 *
 * ExpandPercents --
 *
 *	Given a command and an event, produce a new command by replacing %
 *	constructs in the original command with information from the X event.
 *
 * Results:
 *	The new expanded command is appended to the dynamic string given by
 *	dsPtr.
 *
 * Side effects:
 *	None.
 *
 *--------------------------------------------------------------
 */

static void
ExpandPercents(
    TkWindow *winPtr,		/* Window where event occurred: needed to get
				 * input context. */
    const char *before,		/* Command containing percent expressions to
				 * be replaced. */
    XEvent *eventPtr,		/* X event containing information to be used
				 * in % replacements. */
    KeySym keySym,		/* KeySym: only relevant for KeyPress and
				 * KeyRelease events). */
    Tcl_DString *dsPtr)		/* Dynamic string in which to append new
				 * command. */
{
    int spaceNeeded, cvtFlags;	/* Used to substitute string as proper Tcl
				 * list element. */
    int number, flags, length;
#define NUM_SIZE 40
    const char *string;
    Tcl_DString buf;
    char numStorage[NUM_SIZE+1];

    Tcl_DStringInit(&buf);

    if (eventPtr->type < TK_LASTEVENT) {
	flags = flagArray[eventPtr->type];
    } else {
	flags = 0;
    }

    while (1) {
	/*
	 * Find everything up to the next % character and append it to the
	 * result string.
	 */

	for (string = before; (*string != 0) && (*string != '%'); string++) {
	    /* Empty loop body. */
	}
	if (string != before) {
	    Tcl_DStringAppend(dsPtr, before, (int) (string-before));
	    before = string;
	}
	if (*before == 0) {
	    break;
	}

	/*
	 * There's a percent sequence here. Process it.
	 */

	number = 0;
	string = "??";
	switch (before[1]) {
	case '#':
	    number = eventPtr->xany.serial;
	    goto doNumber;
	case 'a':
	    if (flags & CONFIG) {
		TkpPrintWindowId(numStorage, eventPtr->xconfigure.above);
		string = numStorage;
	    }
	    goto doString;
	case 'b':
	    if (flags & BUTTON) {
		number = eventPtr->xbutton.button;
		goto doNumber;
	    }
	    goto doString;
	case 'c':
	    if (flags & EXPOSE) {
		number = eventPtr->xexpose.count;
		goto doNumber;
	    }
	    goto doString;
	case 'd':
	    if (flags & (CROSSING|FOCUS)) {
		if (flags & FOCUS) {
		    number = eventPtr->xfocus.detail;
		} else {
		    number = eventPtr->xcrossing.detail;
		}
		string = TkFindStateString(notifyDetail, number);
	    } else if (flags & CONFIGREQ) {
		if (eventPtr->xconfigurerequest.value_mask & CWStackMode) {
		    string = TkFindStateString(configureRequestDetail,
			    eventPtr->xconfigurerequest.detail);
		} else {
		    string = "";
		}
	    } else if (flags & VIRTUAL) {
		XVirtualEvent *vePtr = (XVirtualEvent *) eventPtr;

		if (vePtr->user_data != NULL) {
		    string = Tcl_GetString(vePtr->user_data);
		} else {
		    string = "";
		}
	    }
	    goto doString;
	case 'f':
	    if (flags & CROSSING) {
		number = eventPtr->xcrossing.focus;
		goto doNumber;
	    }
	    goto doString;
	case 'h':
	    if (flags & EXPOSE) {
		number = eventPtr->xexpose.height;
	    } else if (flags & CONFIG) {
		number = eventPtr->xconfigure.height;
	    } else if (flags & CREATE) {
		number = eventPtr->xcreatewindow.height;
	    } else if (flags & CONFIGREQ) {
		number = eventPtr->xconfigurerequest.height;
	    } else if (flags & RESIZEREQ) {
		number = eventPtr->xresizerequest.height;
	    } else {
		goto doString;
	    }
	    goto doNumber;
	case 'i':
	    if (flags & CREATE) {
		TkpPrintWindowId(numStorage, eventPtr->xcreatewindow.window);
	    } else if (flags & CONFIGREQ) {
		TkpPrintWindowId(numStorage,
			eventPtr->xconfigurerequest.window);
	    } else if (flags & MAPREQ) {
		TkpPrintWindowId(numStorage, eventPtr->xmaprequest.window);
	    } else {
		TkpPrintWindowId(numStorage, eventPtr->xany.window);
	    }
	    string = numStorage;
	    goto doString;
	case 'k':
	    if (flags & KEY) {
		number = eventPtr->xkey.keycode;
		goto doNumber;
	    }
	    goto doString;
	case 'm':
	    if (flags & CROSSING) {
		number = eventPtr->xcrossing.mode;
		string = TkFindStateString(notifyMode, number);
	    } else if (flags & FOCUS) {
		number = eventPtr->xfocus.mode;
		string = TkFindStateString(notifyMode, number);
	    }
	    goto doString;
	case 'o':
	    if (flags & CREATE) {
		number = eventPtr->xcreatewindow.override_redirect;
	    } else if (flags & MAP) {
		number = eventPtr->xmap.override_redirect;
	    } else if (flags & REPARENT) {
		number = eventPtr->xreparent.override_redirect;
	    } else if (flags & CONFIG) {
		number = eventPtr->xconfigure.override_redirect;
	    } else {
		goto doString;
	    }
	    goto doNumber;
	case 'p':
	    if (flags & CIRC) {
		string = TkFindStateString(circPlace,
			eventPtr->xcirculate.place);
	    } else if (flags & CIRCREQ) {
		string = TkFindStateString(circPlace,
			eventPtr->xcirculaterequest.place);
	    }
	    goto doString;
	case 's':
	    if (flags & KEY_BUTTON_MOTION_VIRTUAL) {
		number = eventPtr->xkey.state;
		goto doNumber;
	    } else if (flags & CROSSING) {
		number = eventPtr->xcrossing.state;
		goto doNumber;
	    } else if (flags & PROP) {
		string = TkFindStateString(propNotify,
			eventPtr->xproperty.state);
	    } else if (flags & VISIBILITY) {
		string = TkFindStateString(visNotify,
			eventPtr->xvisibility.state);
	    }
	    goto doString;
	case 't':
	    if (flags & KEY_BUTTON_MOTION_VIRTUAL) {
		number = (int) eventPtr->xkey.time;
	    } else if (flags & CROSSING) {
		number = (int) eventPtr->xcrossing.time;
	    } else if (flags & PROP) {
		number = (int) eventPtr->xproperty.time;
	    } else {
		goto doString;
	    }
	    goto doNumber;
	case 'v':
	    number = eventPtr->xconfigurerequest.value_mask;
	    goto doNumber;
	case 'w':
	    if (flags & EXPOSE) {
		number = eventPtr->xexpose.width;
	    } else if (flags & CONFIG) {
		number = eventPtr->xconfigure.width;
	    } else if (flags & CREATE) {
		number = eventPtr->xcreatewindow.width;
	    } else if (flags & CONFIGREQ) {
		number = eventPtr->xconfigurerequest.width;
	    } else if (flags & RESIZEREQ) {
		number = eventPtr->xresizerequest.width;
	    } else {
		goto doString;
	    }
	    goto doNumber;
	case 'x':
	    if (flags & KEY_BUTTON_MOTION_VIRTUAL) {
		number = eventPtr->xkey.x;
	    } else if (flags & CROSSING) {
		number = eventPtr->xcrossing.x;
	    } else if (flags & EXPOSE) {
		number = eventPtr->xexpose.x;
	    } else if (flags & (CREATE|CONFIG|GRAVITY)) {
		number = eventPtr->xcreatewindow.x;
	    } else if (flags & REPARENT) {
		number = eventPtr->xreparent.x;
	    } else if (flags & CREATE) {
		number = eventPtr->xcreatewindow.x;
	    } else if (flags & CONFIGREQ) {
		number = eventPtr->xconfigurerequest.x;
	    } else {
		goto doString;
	    }
	    goto doNumber;
	case 'y':
	    if (flags & KEY_BUTTON_MOTION_VIRTUAL) {
		number = eventPtr->xkey.y;
	    } else if (flags & EXPOSE) {
		number = eventPtr->xexpose.y;
	    } else if (flags & (CREATE|CONFIG|GRAVITY)) {
		number = eventPtr->xcreatewindow.y;
	    } else if (flags & REPARENT) {
		number = eventPtr->xreparent.y;
	    } else if (flags & CROSSING) {
		number = eventPtr->xcrossing.y;
	    } else if (flags & CREATE) {
		number = eventPtr->xcreatewindow.y;
	    } else if (flags & CONFIGREQ) {
		number = eventPtr->xconfigurerequest.y;
	    } else {
		goto doString;
	    }
	    goto doNumber;
	case 'A':
	    if (flags & KEY) {
		Tcl_DStringFree(&buf);
		string = TkpGetString(winPtr, eventPtr, &buf);
	    }
	    goto doString;
	case 'B':
	    if (flags & CREATE) {
		number = eventPtr->xcreatewindow.border_width;
	    } else if (flags & CONFIGREQ) {
		number = eventPtr->xconfigurerequest.border_width;
	    } else if (flags & CONFIG) {
		number = eventPtr->xconfigure.border_width;
	    } else {
		goto doString;
	    }
	    goto doNumber;
	case 'D':
	    /*
	     * This is used only by the MouseWheel event.
	     */

	    if (flags & KEY) {
		number = eventPtr->xkey.keycode;
		goto doNumber;
	    }
	    goto doString;
	case 'E':
	    number = (int) eventPtr->xany.send_event;
	    goto doNumber;
	case 'K':
	    if (flags & KEY) {
		const char *name = TkKeysymToString(keySym);

		if (name != NULL) {
		    string = name;
		}
	    }
	    goto doString;
	case 'N':
	    if (flags & KEY) {
		number = (int) keySym;
		goto doNumber;
	    }
	    goto doString;
	case 'P':
	    if (flags & PROP) {
		string = Tk_GetAtomName((Tk_Window) winPtr,
			eventPtr->xproperty.atom);
	    }
	    goto doString;
	case 'R':
	    if (flags & KEY_BUTTON_MOTION_CROSSING) {
		TkpPrintWindowId(numStorage, eventPtr->xkey.root);
		string = numStorage;
	    }
	    goto doString;
	case 'S':
	    if (flags & KEY_BUTTON_MOTION_CROSSING) {
		TkpPrintWindowId(numStorage, eventPtr->xkey.subwindow);
		string = numStorage;
	    }
	    goto doString;
	case 'T':
	    number = eventPtr->type;
	    goto doNumber;
	case 'W': {
	    Tk_Window tkwin;

	    tkwin = Tk_IdToWindow(eventPtr->xany.display,
		    eventPtr->xany.window);
	    if (tkwin != NULL) {
		string = Tk_PathName(tkwin);
	    } else {
		string = "??";
	    }
	    goto doString;
	}
	case 'X':
	    if (flags & KEY_BUTTON_MOTION_CROSSING) {
		Tk_Window tkwin;
		int x, y;
		int width, height;

		number = eventPtr->xkey.x_root;
		tkwin = Tk_IdToWindow(eventPtr->xany.display,
			eventPtr->xany.window);
		if (tkwin != NULL) {
		    Tk_GetVRootGeometry(tkwin, &x, &y, &width, &height);
		    number -= x;
		}
		goto doNumber;
	    }
	    goto doString;
	case 'Y':
	    if (flags & KEY_BUTTON_MOTION_CROSSING) {
		Tk_Window tkwin;
		int x, y;
		int width, height;

		number = eventPtr->xkey.y_root;
		tkwin = Tk_IdToWindow(eventPtr->xany.display,
			eventPtr->xany.window);
		if (tkwin != NULL) {
		    Tk_GetVRootGeometry(tkwin, &x, &y, &width, &height);
		    number -= y;
		}
		goto doNumber;
	    }
	    goto doString;
	default:
	    numStorage[0] = before[1];
	    numStorage[1] = '\0';
	    string = numStorage;
	    goto doString;
	}

    doNumber:
	sprintf(numStorage, "%d", number);
	string = numStorage;

    doString:
	spaceNeeded = Tcl_ScanElement(string, &cvtFlags);
	length = Tcl_DStringLength(dsPtr);
	Tcl_DStringSetLength(dsPtr, length + spaceNeeded);
	spaceNeeded = Tcl_ConvertElement(string,
		Tcl_DStringValue(dsPtr) + length,
		cvtFlags | TCL_DONT_USE_BRACES);
	Tcl_DStringSetLength(dsPtr, length + spaceNeeded);
	before += 2;
    }
    Tcl_DStringFree(&buf);
}

/*
 *----------------------------------------------------------------------
 *
 * ChangeScreen --
 *
 *	This function is invoked whenever the current screen changes in an
 *	application. It invokes a Tcl command named "tk::ScreenChanged",
 *	passing it the screen name as argument. tk::ScreenChanged does things
 *	like making the tk::Priv variable point to an array for the current
 *	display.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Depends on what tk::ScreenChanged does. If an error occurs then
 *	bgerror will be invoked.
 *
 *----------------------------------------------------------------------
 */

static void
ChangeScreen(
    Tcl_Interp *interp,		/* Interpreter in which to invoke command. */
    char *dispName,		/* Name of new display. */
    int screenIndex)		/* Index of new screen. */
{
    Tcl_Obj *cmdObj = Tcl_ObjPrintf("::tk::ScreenChanged %s.%d",
	    dispName, screenIndex);
    int code;

    Tcl_IncrRefCount(cmdObj);
    code = Tcl_GlobalEvalObj(interp, cmdObj);
    if (code != TCL_OK) {
	Tcl_AddErrorInfo(interp,
		"\n    (changing screen in event binding)");
	Tcl_BackgroundException(interp, code);
    }
    Tcl_DecrRefCount(cmdObj);
}

/*
 *----------------------------------------------------------------------
 *
 * Tk_EventCmd --
 *
 *	This function is invoked to process the "event" Tcl command. It is
 *	used to define and generate events.
 *
 * Results:
 *	A standard Tcl result.
 *
 * Side effects:
 *	See the user documentation.
 *
 *----------------------------------------------------------------------
 */

int
Tk_EventObjCmd(
    ClientData clientData,	/* Main window associated with interpreter. */
    Tcl_Interp *interp,		/* Current interpreter. */
    int objc,			/* Number of arguments. */
    Tcl_Obj *const objv[])	/* Argument objects. */
{
    int index, i;
    char *name;
    const char *event;
    Tk_Window tkwin = clientData;
    TkBindInfo bindInfo = ((TkWindow *) tkwin)->mainPtr->bindInfo;
    VirtualEventTable *vetPtr = &bindInfo->virtualEventTable;
    static const char *const optionStrings[] = {
	"add",		"delete",	"generate",	"info",
	NULL
    };
    enum options {
	EVENT_ADD,	EVENT_DELETE,	EVENT_GENERATE,	EVENT_INFO
    };


    if (objc < 2) {
	Tcl_WrongNumArgs(interp, 1, objv, "option ?arg?");
	return TCL_ERROR;
    }
    if (Tcl_GetIndexFromObj(interp, objv[1], optionStrings, "option", 0,
	    &index) != TCL_OK) {
	return TCL_ERROR;
    }

    switch ((enum options) index) {
    case EVENT_ADD:
	if (objc < 4) {
	    Tcl_WrongNumArgs(interp, 2, objv,
		    "virtual sequence ?sequence ...?");
	    return TCL_ERROR;
	}
	name = Tcl_GetString(objv[2]);
	for (i = 3; i < objc; i++) {
	    event = Tcl_GetString(objv[i]);
	    if (CreateVirtualEvent(interp, vetPtr, name, event) != TCL_OK) {
		return TCL_ERROR;
	    }
	}
	break;
    case EVENT_DELETE:
	if (objc < 3) {
	    Tcl_WrongNumArgs(interp, 2, objv, "virtual ?sequence ...?");
	    return TCL_ERROR;
	}
	name = Tcl_GetString(objv[2]);
	if (objc == 3) {
	    return DeleteVirtualEvent(interp, vetPtr, name, NULL);
	}
	for (i = 3; i < objc; i++) {
	    event = Tcl_GetString(objv[i]);
	    if (DeleteVirtualEvent(interp, vetPtr, name, event) != TCL_OK) {
		return TCL_ERROR;
	    }
	}
	break;
    case EVENT_GENERATE:
	if (objc < 4) {
	    Tcl_WrongNumArgs(interp, 2, objv,
		    "window event ?-option value ...?");
	    return TCL_ERROR;
	}
	return HandleEventGenerate(interp, tkwin, objc - 2, objv + 2);
    case EVENT_INFO:
	if (objc == 2) {
	    GetAllVirtualEvents(interp, vetPtr);
	    return TCL_OK;
	} else if (objc == 3) {
	    return GetVirtualEvent(interp, vetPtr, objv[2]);
	} else {
	    Tcl_WrongNumArgs(interp, 2, objv, "?virtual?");
	    return TCL_ERROR;
	}
    }
    return TCL_OK;
}

/*
 *---------------------------------------------------------------------------
 *
 * InitVirtualEventTable --
 *
 *	Given storage for a virtual event table, set up the fields to prepare
 *	a new domain in which virtual events may be defined.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	*vetPtr is now initialized.
 *
 *---------------------------------------------------------------------------
 */

static void
InitVirtualEventTable(
    VirtualEventTable *vetPtr)	/* Pointer to virtual event table. Memory is
				 * supplied by the caller. */
{
    Tcl_InitHashTable(&vetPtr->patternTable,
	    sizeof(PatternTableKey) / sizeof(int));
    Tcl_InitHashTable(&vetPtr->nameTable, TCL_ONE_WORD_KEYS);
}

/*
 *---------------------------------------------------------------------------
 *
 * DeleteVirtualEventTable --
 *
 *	Delete the contents of a virtual event table. The caller is
 *	responsible for freeing any memory used by the table itself.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Memory is freed.
 *
 *---------------------------------------------------------------------------
 */

static void
DeleteVirtualEventTable(
    VirtualEventTable *vetPtr)	/* The virtual event table to delete. */
{
    Tcl_HashEntry *hPtr;
    Tcl_HashSearch search;
    PatSeq *psPtr, *nextPtr;

    hPtr = Tcl_FirstHashEntry(&vetPtr->patternTable, &search);
    for ( ; hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
	psPtr = Tcl_GetHashValue(hPtr);
	for ( ; psPtr != NULL; psPtr = nextPtr) {
	    nextPtr = psPtr->nextSeqPtr;
	    ckfree(psPtr->voPtr);
	    ckfree(psPtr);
	}
    }
    Tcl_DeleteHashTable(&vetPtr->patternTable);

    hPtr = Tcl_FirstHashEntry(&vetPtr->nameTable, &search);
    for ( ; hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
	ckfree(Tcl_GetHashValue(hPtr));
    }
    Tcl_DeleteHashTable(&vetPtr->nameTable);
}

/*
 *----------------------------------------------------------------------
 *
 * CreateVirtualEvent --
 *
 *	Add a new definition for a virtual event. If the virtual event is
 *	already defined, the new definition augments those that already exist.
 *
 * Results:
 *	The return value is TCL_ERROR if an error occured while creating the
 *	virtual binding. In this case, an error message will be left in the
 *	interp's result. If all went well then the return value is TCL_OK.
 *
 * Side effects:
 *	The virtual event may cause future calls to Tk_BindEvent to behave
 *	differently than they did previously.
 *
 *----------------------------------------------------------------------
 */

static int
CreateVirtualEvent(
    Tcl_Interp *interp,		/* Used for error reporting. */
    VirtualEventTable *vetPtr,	/* Table in which to augment virtual event. */
    char *virtString,		/* Name of new virtual event. */
    const char *eventString)		/* String describing physical event that
				 * triggers virtual event. */
{
    PatSeq *psPtr;
    int dummy;
    Tcl_HashEntry *vhPtr;
    unsigned long eventMask;
    PhysicalsOwned *poPtr;
    VirtualOwners *voPtr;
    Tk_Uid virtUid;

    virtUid = GetVirtualEventUid(interp, virtString);
    if (virtUid == NULL) {
	return TCL_ERROR;
    }

    /*
     * Find/create physical event
     */

    psPtr = FindSequence(interp, &vetPtr->patternTable, NULL, eventString,
	    1, 0, &eventMask);
    if (psPtr == NULL) {
	return TCL_ERROR;
    }

    /*
     * Find/create virtual event.
     */

    vhPtr = Tcl_CreateHashEntry(&vetPtr->nameTable, virtUid, &dummy);

    /*
     * Make virtual event own the physical event.
     */

    poPtr = Tcl_GetHashValue(vhPtr);
    if (poPtr == NULL) {
	poPtr = ckalloc(sizeof(PhysicalsOwned));
	poPtr->numOwned = 0;
    } else {
	/*
	 * See if this virtual event is already defined for this physical
	 * event and just return if it is.
	 */

	int i;

	for (i = 0; i < poPtr->numOwned; i++) {
	    if (poPtr->patSeqs[i] == psPtr) {
		return TCL_OK;
	    }
	}
	poPtr = ckrealloc(poPtr, sizeof(PhysicalsOwned)
		+ poPtr->numOwned * sizeof(PatSeq *));
    }
    Tcl_SetHashValue(vhPtr, poPtr);
    poPtr->patSeqs[poPtr->numOwned] = psPtr;
    poPtr->numOwned++;

    /*
     * Make physical event so it can trigger the virtual event.
     */

    voPtr = psPtr->voPtr;
    if (voPtr == NULL) {
	voPtr = ckalloc(sizeof(VirtualOwners));
	voPtr->numOwners = 0;
    } else {
	voPtr = ckrealloc(voPtr, sizeof(VirtualOwners)
		+ voPtr->numOwners * sizeof(Tcl_HashEntry *));
    }
    psPtr->voPtr = voPtr;
    voPtr->owners[voPtr->numOwners] = vhPtr;
    voPtr->numOwners++;

    return TCL_OK;
}

/*
 *--------------------------------------------------------------
 *
 * DeleteVirtualEvent --
 *
 *	Remove the definition of a given virtual event. If the event string is
 *	NULL, all definitions of the virtual event will be removed.
 *	Otherwise, just the specified definition of the virtual event will be
 *	removed.
 *
 * Results:
 *	The result is a standard Tcl return value. If an error occurs then the
 *	interp's result will contain an error message. It is not an error to
 *	attempt to delete a virtual event that does not exist or a definition
 *	that does not exist.
 *
 * Side effects:
 *	The virtual event given by virtString may be removed from the virtual
 *	event table.
 *
 *--------------------------------------------------------------
 */

static int
DeleteVirtualEvent(
    Tcl_Interp *interp,		/* Used for error reporting. */
    VirtualEventTable *vetPtr,	/* Table in which to delete event. */
    char *virtString,		/* String describing event sequence that
				 * triggers binding. */
    const char *eventString)		/* The event sequence that should be deleted,
				 * or NULL to delete all event sequences for
				 * the entire virtual event. */
{
    int iPhys;
    Tk_Uid virtUid;
    Tcl_HashEntry *vhPtr;
    PhysicalsOwned *poPtr;
    PatSeq *eventPSPtr;

    virtUid = GetVirtualEventUid(interp, virtString);
    if (virtUid == NULL) {
	return TCL_ERROR;
    }

    vhPtr = Tcl_FindHashEntry(&vetPtr->nameTable, virtUid);
    if (vhPtr == NULL) {
	return TCL_OK;
    }
    poPtr = Tcl_GetHashValue(vhPtr);

    eventPSPtr = NULL;
    if (eventString != NULL) {
	unsigned long eventMask;

	/*
	 * Delete only the specific physical event associated with the virtual
	 * event. If the physical event doesn't already exist, or the virtual
	 * event doesn't own that physical event, return w/o doing anything.
	 */

	eventPSPtr = FindSequence(interp, &vetPtr->patternTable, NULL,
		eventString, 0, 0, &eventMask);
	if (eventPSPtr == NULL) {
	    const char *string = Tcl_GetStringResult(interp);

	    return (string[0] != '\0') ? TCL_ERROR : TCL_OK;
	}
    }

    for (iPhys = poPtr->numOwned; --iPhys >= 0; ) {
	PatSeq *psPtr = poPtr->patSeqs[iPhys];

	if ((eventPSPtr == NULL) || (psPtr == eventPSPtr)) {
	    int iVirt;
	    VirtualOwners *voPtr;

	    /*
	     * Remove association between this physical event and the given
	     * virtual event that it triggers.
	     */

	    voPtr = psPtr->voPtr;
	    for (iVirt = 0; iVirt < voPtr->numOwners; iVirt++) {
		if (voPtr->owners[iVirt] == vhPtr) {
		    break;
		}
	    }
	    if (iVirt == voPtr->numOwners) {
		Tcl_Panic("DeleteVirtualEvent: couldn't find owner");
	    }
	    voPtr->numOwners--;
	    if (voPtr->numOwners == 0) {
		/*
		 * Removed last reference to this physical event, so remove it
		 * from physical->virtual map.
		 */

		PatSeq *prevPtr = Tcl_GetHashValue(psPtr->hPtr);

		if (prevPtr == psPtr) {
		    if (psPtr->nextSeqPtr == NULL) {
			Tcl_DeleteHashEntry(psPtr->hPtr);
		    } else {
			Tcl_SetHashValue(psPtr->hPtr,
				psPtr->nextSeqPtr);
		    }
		} else {
		    for ( ; ; prevPtr = prevPtr->nextSeqPtr) {
			if (prevPtr == NULL) {
			    Tcl_Panic("DeleteVirtualEvent couldn't find on hash chain");
			}
			if (prevPtr->nextSeqPtr == psPtr) {
			    prevPtr->nextSeqPtr = psPtr->nextSeqPtr;
			    break;
			}
		    }
		}
		ckfree(psPtr->voPtr);
		ckfree(psPtr);
	    } else {
		/*
		 * This physical event still triggers some other virtual
		 * event(s). Consolidate the list of virtual owners for this
		 * physical event so it no longer triggers the given virtual
		 * event.
		 */

		voPtr->owners[iVirt] = voPtr->owners[voPtr->numOwners];
	    }

	    /*
	     * Now delete the virtual event's reference to the physical event.
	     */

	    poPtr->numOwned--;
	    if (eventPSPtr != NULL && poPtr->numOwned != 0) {
		/*
		 * Just deleting this one physical event. Consolidate list of
		 * owned physical events and return.
		 */

		poPtr->patSeqs[iPhys] = poPtr->patSeqs[poPtr->numOwned];
		return TCL_OK;
	    }
	}
    }

    if (poPtr->numOwned == 0) {
	/*
	 * All the physical events for this virtual event were deleted, either
	 * because there was only one associated physical event or because the
	 * caller was deleting the entire virtual event. Now the virtual event
	 * itself should be deleted.
	 */

	ckfree(poPtr);
	Tcl_DeleteHashEntry(vhPtr);
    }
    return TCL_OK;
}

/*
 *---------------------------------------------------------------------------
 *
 * GetVirtualEvent --
 *
 *	Return the list of physical events that can invoke the given virtual
 *	event.
 *
 * Results:
 *	The return value is TCL_OK and the interp's result is filled with the
 *	string representation of the physical events associated with the
 *	virtual event; if there are no physical events for the given virtual
 *	event, the interp's result is filled with and empty string. If the
 *	virtual event string is improperly formed, then TCL_ERROR is returned
 *	and an error message is left in the interp's result.
 *
 * Side effects:
 *	None.
 *
 *---------------------------------------------------------------------------
 */

static int
GetVirtualEvent(
    Tcl_Interp *interp,		/* Interpreter for reporting. */
    VirtualEventTable *vetPtr,	/* Table in which to look for event. */
    Tcl_Obj *virtName)		/* String describing virtual event. */
{
    Tcl_HashEntry *vhPtr;
    Tcl_DString ds;
    int iPhys;
    PhysicalsOwned *poPtr;
    Tk_Uid virtUid;

    virtUid = GetVirtualEventUid(interp, Tcl_GetString(virtName));
    if (virtUid == NULL) {
	return TCL_ERROR;
    }

    vhPtr = Tcl_FindHashEntry(&vetPtr->nameTable, virtUid);
    if (vhPtr == NULL) {
	return TCL_OK;
    }

    Tcl_DStringInit(&ds);

    poPtr = Tcl_GetHashValue(vhPtr);
    for (iPhys = 0; iPhys < poPtr->numOwned; iPhys++) {
	Tcl_DStringSetLength(&ds, 0);
	GetPatternString(poPtr->patSeqs[iPhys], &ds);
	Tcl_AppendElement(interp, Tcl_DStringValue(&ds));
    }
    Tcl_DStringFree(&ds);

    return TCL_OK;
}

/*
 *--------------------------------------------------------------
 *
 * GetAllVirtualEvents --
 *
 *	Return a list that contains the names of all the virtual event
 *	defined.
 *
 * Results:
 *	There is no return value. The interp's result is modified to hold a
 *	Tcl list with one entry for each virtual event in nameTable.
 *
 * Side effects:
 *	None.
 *
 *--------------------------------------------------------------
 */

static void
GetAllVirtualEvents(
    Tcl_Interp *interp,		/* Interpreter returning result. */
    VirtualEventTable *vetPtr)	/* Table containing events. */
{
    Tcl_HashEntry *hPtr;
    Tcl_HashSearch search;
    Tcl_DString ds;

    Tcl_DStringInit(&ds);

    hPtr = Tcl_FirstHashEntry(&vetPtr->nameTable, &search);
    for ( ; hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
	Tcl_DStringSetLength(&ds, 0);
	Tcl_DStringAppend(&ds, "<<", 2);
	Tcl_DStringAppend(&ds, Tcl_GetHashKey(hPtr->tablePtr, hPtr), -1);
	Tcl_DStringAppend(&ds, ">>", 2);
	Tcl_AppendElement(interp, Tcl_DStringValue(&ds));
    }

    Tcl_DStringFree(&ds);
}

/*
 *---------------------------------------------------------------------------
 *
 * HandleEventGenerate --
 *
 *	Helper function for the "event generate" command. Generate and process
 *	an XEvent, constructed from information parsed from the event
 *	description string and its optional arguments.
 *
 *	argv[0] contains name of the target window.
 *	argv[1] contains pattern string for one event (e.g, <Control-v>).
 *	argv[2..argc-1] contains -field/option pairs for specifying additional
 *			detail in the generated event.
 *
 *	Either virtual or physical events can be generated this way. The event
 *	description string must contain the specification for only one event.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	When constructing the event,
 *	    event.xany.serial is filled with the current X serial number.
 *	    event.xany.window is filled with the target window.
 *	    event.xany.display is filled with the target window's display.
 *	Any other fields in eventPtr which are not specified by the pattern
 *	string or the optional arguments, are set to 0.
 *
 *	The event may be handled sychronously or asynchronously, depending on
 *	the value specified by the optional "-when" option. The default
 *	setting is synchronous.
 *
 *---------------------------------------------------------------------------
 */

static int
HandleEventGenerate(
    Tcl_Interp *interp,		/* Interp for errors return and name lookup. */
    Tk_Window mainWin,		/* Main window associated with interp. */
    int objc,			/* Number of arguments. */
    Tcl_Obj *const objv[])	/* Argument objects. */
{
    union {XEvent general; XVirtualEvent virtual;} event;
    const char *p;
    const char *name, *windowName;
    int count, flags, synch, i, number, warp;
    Tcl_QueuePosition pos;
    Pattern pat;
    Tk_Window tkwin, tkwin2;
    TkWindow *mainPtr;
    unsigned long eventMask;
    Tcl_Obj *userDataObj;

    static const char *const fieldStrings[] = {
	"-when",	"-above",	"-borderwidth",	"-button",
	"-count",	"-data",	"-delta",	"-detail",
	"-focus",	"-height",
	"-keycode",	"-keysym",	"-mode",	"-override",
	"-place",	"-root",	"-rootx",	"-rooty",
	"-sendevent",	"-serial",	"-state",	"-subwindow",
	"-time",	"-warp",	"-width",	"-window",
	"-x",		"-y",	NULL
    };
    enum field {
	EVENT_WHEN,	EVENT_ABOVE,	EVENT_BORDER,	EVENT_BUTTON,
	EVENT_COUNT,	EVENT_DATA,	EVENT_DELTA,	EVENT_DETAIL,
	EVENT_FOCUS,	EVENT_HEIGHT,
	EVENT_KEYCODE,	EVENT_KEYSYM,	EVENT_MODE,	EVENT_OVERRIDE,
	EVENT_PLACE,	EVENT_ROOT,	EVENT_ROOTX,	EVENT_ROOTY,
	EVENT_SEND,	EVENT_SERIAL,	EVENT_STATE,	EVENT_SUBWINDOW,
	EVENT_TIME,	EVENT_WARP,	EVENT_WIDTH,	EVENT_WINDOW,
	EVENT_X,	EVENT_Y
    };

    windowName = Tcl_GetString(objv[0]);
    if (!windowName[0]) {
	tkwin = mainWin;
    } else if (NameToWindow(interp, mainWin, objv[0], &tkwin) != TCL_OK) {
	return TCL_ERROR;
    }

    mainPtr = (TkWindow *) mainWin;
    if ((tkwin == NULL)
	    || (mainPtr->mainPtr != ((TkWindow *) tkwin)->mainPtr)) {
	Tcl_AppendResult(interp, "window id \"", Tcl_GetString(objv[0]),
		"\" doesn't exist in this application", NULL);
	return TCL_ERROR;
    }

    name = Tcl_GetString(objv[1]);

    p = name;
    eventMask = 0;
    userDataObj = NULL;
    count = ParseEventDescription(interp, &p, &pat, &eventMask);
    if (count == 0) {
	return TCL_ERROR;
    }
    if (count != 1) {
	Tcl_SetResult(interp, "Double or Triple modifier not allowed",
		TCL_STATIC);
	return TCL_ERROR;
    }
    if (*p != '\0') {
	Tcl_SetResult(interp, "only one event specification allowed",
		TCL_STATIC);
	return TCL_ERROR;
    }

    memset(&event, 0, sizeof(event));
    event.general.xany.type = pat.eventType;
    event.general.xany.serial = NextRequest(Tk_Display(tkwin));
    event.general.xany.send_event = False;
    if (windowName[0]) {
	event.general.xany.window = Tk_WindowId(tkwin);
    } else {
	event.general.xany.window =
		RootWindow(Tk_Display(tkwin), Tk_ScreenNumber(tkwin));
    }
    event.general.xany.display = Tk_Display(tkwin);

    flags = flagArray[event.general.xany.type];
    if (flags & DESTROY) {
	/*
	 * Event DestroyNotify should be generated by destroying the window.
	 */

	Tk_DestroyWindow(tkwin);
	return TCL_OK;
    }
    if (flags & KEY_BUTTON_MOTION_VIRTUAL) {
	event.general.xkey.state = pat.needMods;
	if ((flags & KEY) && (event.general.xany.type != MouseWheelEvent)) {
	    TkpSetKeycodeAndState(tkwin, pat.detail.keySym, &event.general);
	} else if (flags & BUTTON) {
	    event.general.xbutton.button = pat.detail.button;
	} else if (flags & VIRTUAL) {
	    event.virtual.name = pat.detail.name;
	}
    }
    if (flags & (CREATE|UNMAP|MAP|REPARENT|CONFIG|GRAVITY|CIRC)) {
	event.general.xcreatewindow.window = event.general.xany.window;
    }

    if (flags & KEY_BUTTON_MOTION_CROSSING) {
	event.general.xkey.x_root = -1;
	event.general.xkey.y_root = -1;
    }

    if (event.general.xany.type == FocusIn
	    || event.general.xany.type == FocusOut) {
	event.general.xany.send_event = GENERATED_FOCUS_EVENT_MAGIC;
    }

    /*
     * Process the remaining arguments to fill in additional fields of the
     * event.
     */

    synch = 1;
    warp = 0;
    pos = TCL_QUEUE_TAIL;
    for (i = 2; i < objc; i += 2) {
	Tcl_Obj *optionPtr, *valuePtr;
	int index;

	optionPtr = objv[i];
	valuePtr = objv[i + 1];

	if (Tcl_GetIndexFromObj(interp, optionPtr, fieldStrings, "option",
		TCL_EXACT, &index) != TCL_OK) {
	    return TCL_ERROR;
	}
	if (objc & 1) {
	    /*
	     * This test occurs after Tcl_GetIndexFromObj() so that "event
	     * generate <Button> -xyz" will return the error message that
	     * "-xyz" is a bad option, rather than that the value for "-xyz"
	     * is missing.
	     */

	    Tcl_AppendResult(interp, "value for \"", Tcl_GetString(optionPtr),
		    "\" missing", NULL);
	    return TCL_ERROR;
	}

	switch ((enum field) index) {
	case EVENT_WARP:
	    if (Tcl_GetBooleanFromObj(interp, valuePtr, &warp) != TCL_OK) {
		return TCL_ERROR;
	    }
	    if (!(flags & KEY_BUTTON_MOTION_VIRTUAL)) {
		goto badopt;
	    }
	    break;
	case EVENT_WHEN:
	    pos = (Tcl_QueuePosition) TkFindStateNumObj(interp, optionPtr,
		    queuePosition, valuePtr);
	    if ((int) pos < -1) {
		return TCL_ERROR;
	    }
	    synch = 0;
	    if ((int) pos == -1) {
		synch = 1;
	    }
	    break;
	case EVENT_ABOVE:
	    if (NameToWindow(interp, tkwin, valuePtr, &tkwin2) != TCL_OK) {
		return TCL_ERROR;
	    }
	    if (flags & CONFIG) {
		event.general.xconfigure.above = Tk_WindowId(tkwin2);
	    } else {
		goto badopt;
	    }
	    break;
	case EVENT_BORDER:
	    if (Tk_GetPixelsFromObj(interp,tkwin,valuePtr,&number) != TCL_OK) {
		return TCL_ERROR;
	    }
	    if (flags & (CREATE|CONFIG)) {
		event.general.xcreatewindow.border_width = number;
	    } else {
		goto badopt;
	    }
	    break;
	case EVENT_BUTTON:
	    if (Tcl_GetIntFromObj(interp, valuePtr, &number) != TCL_OK) {
		return TCL_ERROR;
	    }
	    if (flags & BUTTON) {
		event.general.xbutton.button = number;
	    } else {
		goto badopt;
	    }
	    break;
	case EVENT_COUNT:
	    if (Tcl_GetIntFromObj(interp, valuePtr, &number) != TCL_OK) {
		return TCL_ERROR;
	    }
	    if (flags & EXPOSE) {
		event.general.xexpose.count = number;
	    } else {
		goto badopt;
	    }
	    break;
	case EVENT_DATA:
	    if (flags & VIRTUAL) {
		/*
		 * Do not increment reference count until after parsing
		 * completes and we know that the event generation is really
		 * going to happen.
		 */

		userDataObj = valuePtr;
	    } else {
		goto badopt;
	    }
	    break;
	case EVENT_DELTA:
	    if (Tcl_GetIntFromObj(interp, valuePtr, &number) != TCL_OK) {
		return TCL_ERROR;
	    }
	    if ((flags & KEY) && (event.general.xkey.type == MouseWheelEvent)) {
		event.general.xkey.keycode = number;
	    } else {
		goto badopt;
	    }
	    break;
	case EVENT_DETAIL:
	    number = TkFindStateNumObj(interp, optionPtr, notifyDetail,
		    valuePtr);
	    if (number < 0) {
		return TCL_ERROR;
	    }
	    if (flags & FOCUS) {
		event.general.xfocus.detail = number;
	    } else if (flags & CROSSING) {
		event.general.xcrossing.detail = number;
	    } else {
		goto badopt;
	    }
	    break;
	case EVENT_FOCUS:
	    if (Tcl_GetBooleanFromObj(interp, valuePtr, &number) != TCL_OK) {
		return TCL_ERROR;
	    }
	    if (flags & CROSSING) {
		event.general.xcrossing.focus = number;
	    } else {
		goto badopt;
	    }
	    break;
	case EVENT_HEIGHT:
	    if (Tk_GetPixelsFromObj(interp, tkwin, valuePtr,
		    &number) != TCL_OK) {
		return TCL_ERROR;
	    }
	    if (flags & EXPOSE) {
		event.general.xexpose.height = number;
	    } else if (flags & CONFIG) {
		event.general.xconfigure.height = number;
	    } else {
		goto badopt;
	    }
	    break;
	case EVENT_KEYCODE:
	    if (Tcl_GetIntFromObj(interp, valuePtr, &number) != TCL_OK) {
		return TCL_ERROR;
	    }
	    if ((flags & KEY) && (event.general.xkey.type != MouseWheelEvent)) {
		event.general.xkey.keycode = number;
	    } else {
		goto badopt;
	    }
	    break;
	case EVENT_KEYSYM: {
	    KeySym keysym;
	    const char *value;

	    value = Tcl_GetString(valuePtr);
	    keysym = TkStringToKeysym(value);
	    if (keysym == NoSymbol) {
		Tcl_AppendResult(interp, "unknown keysym \"", value, "\"",
			NULL);
		return TCL_ERROR;
	    }

	    TkpSetKeycodeAndState(tkwin, keysym, &event.general);
	    if (event.general.xkey.keycode == 0) {
		Tcl_AppendResult(interp, "no keycode for keysym \"", value,
			"\"", NULL);
		return TCL_ERROR;
	    }
	    if (!(flags & KEY)
		    || (event.general.xkey.type == MouseWheelEvent)) {
		goto badopt;
	    }
	    break;
	}
	case EVENT_MODE:
	    number = TkFindStateNumObj(interp,optionPtr,notifyMode,valuePtr);
	    if (number < 0) {
		return TCL_ERROR;
	    }
	    if (flags & CROSSING) {
		event.general.xcrossing.mode = number;
	    } else if (flags & FOCUS) {
		event.general.xfocus.mode = number;
	    } else {
		goto badopt;
	    }
	    break;
	case EVENT_OVERRIDE:
	    if (Tcl_GetBooleanFromObj(interp, valuePtr, &number) != TCL_OK) {
		return TCL_ERROR;
	    }
	    if (flags & CREATE) {
		event.general.xcreatewindow.override_redirect = number;
	    } else if (flags & MAP) {
		event.general.xmap.override_redirect = number;
	    } else if (flags & REPARENT) {
		event.general.xreparent.override_redirect = number;
	    } else if (flags & CONFIG) {
		event.general.xconfigure.override_redirect = number;
	    } else {
		goto badopt;
	    }
	    break;
	case EVENT_PLACE:
	    number = TkFindStateNumObj(interp, optionPtr, circPlace, valuePtr);
	    if (number < 0) {
		return TCL_ERROR;
	    }
	    if (flags & CIRC) {
		event.general.xcirculate.place = number;
	    } else {
		goto badopt;
	    }
	    break;
	case EVENT_ROOT:
	    if (NameToWindow(interp, tkwin, valuePtr, &tkwin2) != TCL_OK) {
		return TCL_ERROR;
	    }
	    if (flags & KEY_BUTTON_MOTION_CROSSING) {
		event.general.xkey.root = Tk_WindowId(tkwin2);
	    } else {
		goto badopt;
	    }
	    break;
	case EVENT_ROOTX:
	    if (Tk_GetPixelsFromObj(interp,tkwin,valuePtr,&number) != TCL_OK) {
		return TCL_ERROR;
	    }
	    if (flags & KEY_BUTTON_MOTION_CROSSING) {
		event.general.xkey.x_root = number;
	    } else {
		goto badopt;
	    }
	    break;
	case EVENT_ROOTY:
	    if (Tk_GetPixelsFromObj(interp,tkwin,valuePtr,&number) != TCL_OK) {
		return TCL_ERROR;
	    }
	    if (flags & KEY_BUTTON_MOTION_CROSSING) {
		event.general.xkey.y_root = number;
	    } else {
		goto badopt;
	    }
	    break;
	case EVENT_SEND: {
	    const char *value;

	    value = Tcl_GetString(valuePtr);
	    if (isdigit(UCHAR(value[0]))) {
		/*
		 * Allow arbitrary integer values for the field; they are
		 * needed by a few of the tests in the Tk test suite.
		 */

		if (Tcl_GetIntFromObj(interp, valuePtr, &number) != TCL_OK) {
		    return TCL_ERROR;
		}
	    } else {
		if (Tcl_GetBooleanFromObj(interp,valuePtr,&number) != TCL_OK) {
		    return TCL_ERROR;
		}
	    }
	    event.general.xany.send_event = number;
	    break;
	}
	case EVENT_SERIAL:
	    if (Tcl_GetIntFromObj(interp, valuePtr, &number) != TCL_OK) {
		return TCL_ERROR;
	    }
	    event.general.xany.serial = number;
	    break;
	case EVENT_STATE:
	    if (flags & KEY_BUTTON_MOTION_CROSSING) {
		if (Tcl_GetIntFromObj(interp, valuePtr, &number) != TCL_OK) {
		    return TCL_ERROR;
		}
		if (flags & KEY_BUTTON_MOTION_VIRTUAL) {
		    event.general.xkey.state = number;
		} else {
		    event.general.xcrossing.state = number;
		}
	    } else if (flags & VISIBILITY) {
		number = TkFindStateNumObj(interp, optionPtr, visNotify,
			valuePtr);
		if (number < 0) {
		    return TCL_ERROR;
		}
		event.general.xvisibility.state = number;
	    } else {
		goto badopt;
	    }
	    break;
	case EVENT_SUBWINDOW:
	    if (NameToWindow(interp, tkwin, valuePtr, &tkwin2) != TCL_OK) {
		return TCL_ERROR;
	    }
	    if (flags & KEY_BUTTON_MOTION_CROSSING) {
		event.general.xkey.subwindow = Tk_WindowId(tkwin2);
	    } else {
		goto badopt;
	    }
	    break;
	case EVENT_TIME:
	    if (Tcl_GetIntFromObj(interp, valuePtr, &number) != TCL_OK) {
		return TCL_ERROR;
	    }
	    if (flags & KEY_BUTTON_MOTION_CROSSING) {
		event.general.xkey.time = (Time) number;
	    } else if (flags & PROP) {
		event.general.xproperty.time = (Time) number;
	    } else {
		goto badopt;
	    }
	    break;
	case EVENT_WIDTH:
	    if (Tk_GetPixelsFromObj(interp,tkwin,valuePtr,&number) != TCL_OK) {
		return TCL_ERROR;
	    }
	    if (flags & EXPOSE) {
		event.general.xexpose.width = number;
	    } else if (flags & (CREATE|CONFIG)) {
		event.general.xcreatewindow.width = number;
	    } else {
		goto badopt;
	    }
	    break;
	case EVENT_WINDOW:
	    if (NameToWindow(interp, tkwin, valuePtr, &tkwin2) != TCL_OK) {
		return TCL_ERROR;
	    }
	    if (flags & (CREATE|UNMAP|MAP|REPARENT|CONFIG|GRAVITY|CIRC)) {
		event.general.xcreatewindow.window = Tk_WindowId(tkwin2);
	    } else {
		goto badopt;
	    }
	    break;
	case EVENT_X:
	    if (Tk_GetPixelsFromObj(interp,tkwin,valuePtr,&number) != TCL_OK) {
		return TCL_ERROR;
	    }
	    if (flags & KEY_BUTTON_MOTION_CROSSING) {
		event.general.xkey.x = number;

		/*
		 * Only modify rootx as well if it hasn't been changed.
		 */

		if (event.general.xkey.x_root == -1) {
		    int rootX, rootY;

		    Tk_GetRootCoords(tkwin, &rootX, &rootY);
		    event.general.xkey.x_root = rootX + number;
		}
	    } else if (flags & EXPOSE) {
		event.general.xexpose.x = number;
	    } else if (flags & (CREATE|CONFIG|GRAVITY)) {
		event.general.xcreatewindow.x = number;
	    } else if (flags & REPARENT) {
		event.general.xreparent.x = number;
	    } else {
		goto badopt;
	    }
	    break;
	case EVENT_Y:
	    if (Tk_GetPixelsFromObj(interp,tkwin,valuePtr,&number) != TCL_OK) {
		return TCL_ERROR;
	    }
	    if (flags & KEY_BUTTON_MOTION_CROSSING) {
		event.general.xkey.y = number;

		/*
		 * Only modify rooty as well if it hasn't been changed.
		 */

		if (event.general.xkey.y_root == -1) {
		    int rootX, rootY;

		    Tk_GetRootCoords(tkwin, &rootX, &rootY);
		    event.general.xkey.y_root = rootY + number;
		}
	    } else if (flags & EXPOSE) {
		event.general.xexpose.y = number;
	    } else if (flags & (CREATE|CONFIG|GRAVITY)) {
		event.general.xcreatewindow.y = number;
	    } else if (flags & REPARENT) {
		event.general.xreparent.y = number;
	    } else {
		goto badopt;
	    }
	    break;
	}
	continue;

    badopt:
	Tcl_AppendResult(interp, name, " event doesn't accept \"",
		Tcl_GetString(optionPtr), "\" option", NULL);
	return TCL_ERROR;
    }

    /*
     * Don't generate events for windows that don't exist yet.
     */

    if (!event.general.xany.window) {
	goto done;
    }

    if (userDataObj != NULL) {

	/*
	 * Must be virtual event to set that variable to non-NULL. Now we want
	 * to install the object into the event. Note that we must incr the
	 * refcount before firing it into the low-level event subsystem; the
	 * refcount will be decremented once the event has been processed.
	 */

	event.virtual.user_data = userDataObj;
	Tcl_IncrRefCount(userDataObj);
    }

    /*
     * Now we have constructed the event, inject it into the event handling
     * code.
     */

    if (synch != 0) {
	Tk_HandleEvent(&event.general);
    } else {
	Tk_QueueWindowEvent(&event.general, pos);
    }

    /*
     * We only allow warping if the window is mapped.
     */

    if ((warp != 0) && Tk_IsMapped(tkwin)) {
	TkDisplay *dispPtr = TkGetDisplay(event.general.xmotion.display);

	if (!(dispPtr->flags & TK_DISPLAY_IN_WARP)) {
	    Tcl_DoWhenIdle(DoWarp, dispPtr);
	    dispPtr->flags |= TK_DISPLAY_IN_WARP;
	}
	dispPtr->warpWindow = Tk_IdToWindow(Tk_Display(mainWin),
		event.general.xmotion.window);
	dispPtr->warpMainwin = mainWin;
	dispPtr->warpX = event.general.xmotion.x;
	dispPtr->warpY = event.general.xmotion.y;
    }

  done:
    Tcl_ResetResult(interp);
    return TCL_OK;
}

static int
NameToWindow(
    Tcl_Interp *interp,		/* Interp for error return and name lookup. */
    Tk_Window mainWin,		/* Main window of application. */
    Tcl_Obj *objPtr,		/* Contains name or id string of window. */
    Tk_Window *tkwinPtr)	/* Filled with token for window. */
{
    const char *name = Tcl_GetString(objPtr);
    Tk_Window tkwin;

    if (name[0] == '.') {
	tkwin = Tk_NameToWindow(interp, name, mainWin);
	if (tkwin == NULL) {
	    return TCL_ERROR;
	}
    } else {
	Window id;

	/*
	 * Check for the winPtr being valid, even if it looks ok to
	 * TkpScanWindowId. [Bug #411307]
	 */

	if (TkpScanWindowId(NULL, name, &id) != TCL_OK) {
	    goto badWindow;
	}
	tkwin = Tk_IdToWindow(Tk_Display(mainWin), id);
	if (tkwin == NULL) {
	    goto badWindow;
	}
    }
    *tkwinPtr = tkwin;
    return TCL_OK;

  badWindow:
    Tcl_AppendResult(interp, "bad window name/identifier \"",name,"\"", NULL);
    return TCL_ERROR;
}

/*
 *-------------------------------------------------------------------------
 *
 * DoWarp --
 *
 *	Perform Warping of X pointer. Executed as an idle handler only.
 *
 * Results:
 *	None
 *
 * Side effects:
 *	X Pointer will move to a new location.
 *
 *-------------------------------------------------------------------------
 */

static void
DoWarp(
    ClientData clientData)
{
    TkDisplay *dispPtr = clientData;

    TkpWarpPointer(dispPtr);
    XForceScreenSaver(dispPtr->display, ScreenSaverReset);
    dispPtr->flags &= ~TK_DISPLAY_IN_WARP;
}

/*
 *-------------------------------------------------------------------------
 *
 * GetVirtualEventUid --
 *
 *	Determine if the given string is in the proper format for a virtual
 *	event.
 *
 * Results:
 *	The return value is NULL if the virtual event string was not in the
 *	proper format. In this case, an error message will be left in the
 *	interp's result. Otherwise the return value is a Tk_Uid that
 *	represents the virtual event.
 *
 * Side effects:
 *	None.
 *
 *-------------------------------------------------------------------------
 */

static Tk_Uid
GetVirtualEventUid(
    Tcl_Interp *interp,
    char *virtString)
{
    Tk_Uid uid;
    size_t length;

    length = strlen(virtString);

    if (length < 5 || virtString[0] != '<' || virtString[1] != '<' ||
	    virtString[length - 2] != '>' || virtString[length - 1] != '>') {
	Tcl_AppendResult(interp, "virtual event \"", virtString,
		"\" is badly formed", NULL);
	return NULL;
    }
    virtString[length - 2] = '\0';
    uid = Tk_GetUid(virtString + 2);
    virtString[length - 2] = '>';

    return uid;
}

/*
 *----------------------------------------------------------------------
 *
 * FindSequence --
 *
 *	Find the entry in the pattern table that corresponds to a particular
 *	pattern string, and return a pointer to that entry.
 *
 * Results:
 *	The return value is normally a pointer to the PatSeq in patternTable
 *	that corresponds to eventString. If an error was found while parsing
 *	eventString, or if "create" is 0 and no pattern sequence previously
 *	existed, then NULL is returned and the interp's result contains a
 *	message describing the problem. If no pattern sequence previously
 *	existed for eventString, then a new one is created with a NULL command
 *	field. In a successful return, *maskPtr is filled in with a mask of
 *	the event types on which the pattern sequence depends.
 *
 * Side effects:
 *	A new pattern sequence may be allocated.
 *
 *----------------------------------------------------------------------
 */

static PatSeq *
FindSequence(
    Tcl_Interp *interp,		/* Interpreter to use for error reporting. */
    Tcl_HashTable *patternTablePtr,
				/* Table to use for lookup. */
    ClientData object,		/* For binding table, token for object with
				 * which binding is associated. For virtual
				 * event table, NULL. */
    const char *eventString,	/* String description of pattern to match on.
				 * See user documentation for details. */
    int create,			/* 0 means don't create the entry if it
				 * doesn't already exist. Non-zero means
				 * create. */
    int allowVirtual,		/* 0 means that virtual events are not allowed
				 * in the sequence. Non-zero otherwise. */
    unsigned long *maskPtr)	/* *maskPtr is filled in with the event types
				 * on which this pattern sequence depends. */
{
    Pattern pats[EVENT_BUFFER_SIZE];
    int numPats, virtualFound;
    const char *p;
    Pattern *patPtr;
    PatSeq *psPtr;
    Tcl_HashEntry *hPtr;
    int flags, count, isNew;
    size_t sequenceSize;
    unsigned long eventMask;
    PatternTableKey key;

    /*
     *-------------------------------------------------------------
     * Step 1: parse the pattern string to produce an array of Patterns. The
     * array is generated backwards, so that the lowest-indexed pattern
     * corresponds to the last event that must occur.
     *-------------------------------------------------------------
     */

    p = eventString;
    flags = 0;
    eventMask = 0;
    virtualFound = 0;

    patPtr = &pats[EVENT_BUFFER_SIZE-1];
    for (numPats = 0; numPats < EVENT_BUFFER_SIZE; numPats++, patPtr--) {
	while (isspace(UCHAR(*p))) {
	    p++;
	}
	if (*p == '\0') {
	    break;
	}

	count = ParseEventDescription(interp, &p, patPtr, &eventMask);
	if (count == 0) {
	    return NULL;
	}

	if (eventMask & VirtualEventMask) {
	    if (allowVirtual == 0) {
		Tcl_SetResult(interp,
			"virtual event not allowed in definition of another virtual event",
			TCL_STATIC);
		return NULL;
	    }
	    virtualFound = 1;
	}

	/*
	 * Replicate events for DOUBLE, TRIPLE, QUADRUPLE.
	 */

	while ((count-- > 1) && (numPats < EVENT_BUFFER_SIZE-1)) {
	    flags |= PAT_NEARBY;
	    patPtr[-1] = patPtr[0];
	    patPtr--;
	    numPats++;
	}
    }

    /*
     *-------------------------------------------------------------
     * Step 2: find the sequence in the binding table if it exists, and add a
     * new sequence to the table if it doesn't.
     *-------------------------------------------------------------
     */

    if (numPats == 0) {
	Tcl_SetResult(interp, "no events specified in binding", TCL_STATIC);
	return NULL;
    }
    if ((numPats > 1) && (virtualFound != 0)) {
	Tcl_SetResult(interp, "virtual events may not be composed",
		TCL_STATIC);
	return NULL;
    }

    patPtr = &pats[EVENT_BUFFER_SIZE-numPats];
    memset(&key, 0, sizeof(key));
    key.object = object;
    key.type = patPtr->eventType;
    key.detail = patPtr->detail;
    hPtr = Tcl_CreateHashEntry(patternTablePtr, (char *) &key, &isNew);
    sequenceSize = numPats*sizeof(Pattern);
    if (!isNew) {
	for (psPtr = Tcl_GetHashValue(hPtr); psPtr != NULL;
		psPtr = psPtr->nextSeqPtr) {
	    if ((numPats == psPtr->numPats)
		    && ((flags & PAT_NEARBY) == (psPtr->flags & PAT_NEARBY))
		    && (memcmp(patPtr, psPtr->pats, sequenceSize) == 0)) {
		goto done;
	    }
	}
    }
    if (!create) {
	if (isNew) {
	    Tcl_DeleteHashEntry(hPtr);
	}

	/*
	 * No binding exists for the sequence, so return an empty error. This
	 * is a special error that the caller will check for in order to
	 * silently ignore this case. This is a hack that maintains backward
	 * compatibility for Tk_GetBinding but the various "bind" commands
	 * silently ignore missing bindings.
	 */

	return NULL;
    }
    psPtr = ckalloc(sizeof(PatSeq) + (numPats-1)*sizeof(Pattern));
    psPtr->numPats = numPats;
    psPtr->script = NULL;
    psPtr->flags = flags;
    psPtr->nextSeqPtr = Tcl_GetHashValue(hPtr);
    psPtr->hPtr = hPtr;
    psPtr->voPtr = NULL;
    psPtr->nextObjPtr = NULL;
    Tcl_SetHashValue(hPtr, psPtr);

    memcpy(psPtr->pats, patPtr, sequenceSize);

  done:
    *maskPtr = eventMask;
    return psPtr;
}

/*
 *---------------------------------------------------------------------------
 *
 * ParseEventDescription --
 *
 *	Fill Pattern buffer with information about event from event string.
 *
 * Results:
 *	Leaves error message in interp and returns 0 if there was an error due
 *	to a badly formed event string. Returns 1 if proper event was
 *	specified, 2 if Double modifier was used in event string, or 3 if
 *	Triple was used.
 *
 * Side effects:
 *	On exit, eventStringPtr points to rest of event string (after the
 *	closing '>', so that this function can be called repeatedly to parse
 *	all the events in the entire sequence.
 *
 *---------------------------------------------------------------------------
 */

static int
ParseEventDescription(
    Tcl_Interp *interp,		/* For error messages. */
    const char **eventStringPtr,/* On input, holds a pointer to start of event
				 * string. On exit, gets pointer to rest of
				 * string after parsed event. */
    Pattern *patPtr,		/* Filled with the pattern parsed from the
				 * event string. */
    unsigned long *eventMaskPtr)/* Filled with event mask of matched event. */
{
    char *p;
    unsigned long eventMask;
    int count, eventFlags;
#define FIELD_SIZE 48
    char field[FIELD_SIZE];
    Tcl_HashEntry *hPtr;
    Tcl_DString copy;

    Tcl_DStringInit(&copy);
    p = Tcl_DStringAppend(&copy, *eventStringPtr, -1);

    patPtr->eventType = -1;
    patPtr->needMods = 0;
    patPtr->detail.clientData = 0;

    eventMask = 0;
    count = 1;

    /*
     * Handle simple ASCII characters.
     */

    if (*p != '<') {
	char string[2];

	patPtr->eventType = KeyPress;
	eventMask = KeyPressMask;
	string[0] = *p;
	string[1] = 0;
	patPtr->detail.keySym = TkStringToKeysym(string);
	if (patPtr->detail.keySym == NoSymbol) {
	    if (isprint(UCHAR(*p))) {
		patPtr->detail.keySym = *p;
	    } else {
		Tcl_SetObjResult(interp, Tcl_ObjPrintf(
			"bad ASCII character 0x%x", UCHAR(*p)));
		count = 0;
		goto done;
	    }
	}
	p++;
	goto end;
    }

    /*
     * A fancier event description. This can be either a virtual event or a
     * physical event.
     *
     * A virtual event description consists of:
     *
     * 1. double open angle brackets.
     * 2. virtual event name.
     * 3. double close angle brackets.
     *
     * A physical event description consists of:
     *
     * 1. open angle bracket.
     * 2. any number of modifiers, each followed by spaces or dashes.
     * 3. an optional event name.
     * 4. an option button or keysym name. Either this or item 3 *must* be
     *	  present; if both are present then they are separated by spaces or
     *	  dashes.
     * 5. a close angle bracket.
     */

    p++;
    if (*p == '<') {
	/*
	 * This is a virtual event: soak up all the characters up to the next
	 * '>'.
	 */

	char *field = p + 1;

	p = strchr(field, '>');
	if (p == field) {
	    Tcl_SetResult(interp, "virtual event \"<<>>\" is badly formed",
		    TCL_STATIC);
	    count = 0;
	    goto done;
	}
	if ((p == NULL) || (p[1] != '>')) {
	    Tcl_SetResult(interp, "missing \">\" in virtual binding",
		    TCL_STATIC);
	    count = 0;
	    goto done;
	}
	*p = '\0';
	patPtr->eventType = VirtualEvent;
	eventMask = VirtualEventMask;
	patPtr->detail.name = Tk_GetUid(field);
	*p = '>';

	p += 2;
	goto end;
    }

    while (1) {
	ModInfo *modPtr;

	p = GetField(p, field, FIELD_SIZE);
	if (*p == '>') {
	    /*
	     * This solves the problem of, e.g., <Control-M> being
	     * misinterpreted as Control + Meta + missing keysym instead of
	     * Control + KeyPress + M.
	     */

	     break;
	}
	hPtr = Tcl_FindHashEntry(&modTable, field);
	if (hPtr == NULL) {
	    break;
	}
	modPtr = Tcl_GetHashValue(hPtr);
	patPtr->needMods |= modPtr->mask;
	if (modPtr->flags & MULT_CLICKS) {
	    int i = modPtr->flags & MULT_CLICKS;

	    count = 2;
	    while (i >>= 1) {
		count++;
	    }
	}
	while ((*p == '-') || isspace(UCHAR(*p))) {
	    p++;
	}
    }

    eventFlags = 0;
    hPtr = Tcl_FindHashEntry(&eventTable, field);
    if (hPtr != NULL) {
	const EventInfo *eiPtr = Tcl_GetHashValue(hPtr);

	patPtr->eventType = eiPtr->type;
	eventFlags = flagArray[eiPtr->type];
	eventMask = eiPtr->eventMask;
	while ((*p == '-') || isspace(UCHAR(*p))) {
	    p++;
	}
	p = GetField(p, field, FIELD_SIZE);
    }
    if (*field != '\0') {
	if ((*field >= '1') && (*field <= '5') && (field[1] == '\0')) {
	    if (eventFlags == 0) {
		patPtr->eventType = ButtonPress;
		eventMask = ButtonPressMask;
	    } else if (eventFlags & KEY) {
		goto getKeysym;
	    } else if ((eventFlags & BUTTON) == 0) {
		Tcl_AppendResult(interp, "specified button \"", field,
			"\" for non-button event", NULL);
		count = 0;
		goto done;
	    }
	    patPtr->detail.button = (*field - '0');
	} else {

	getKeysym:
	    patPtr->detail.keySym = TkStringToKeysym(field);
	    if (patPtr->detail.keySym == NoSymbol) {
		Tcl_AppendResult(interp, "bad event type or keysym \"",
			field, "\"", NULL);
		count = 0;
		goto done;
	    }
	    if (eventFlags == 0) {
		patPtr->eventType = KeyPress;
		eventMask = KeyPressMask;
	    } else if ((eventFlags & KEY) == 0) {
		Tcl_AppendResult(interp, "specified keysym \"", field,
			"\" for non-key event", NULL);
		count = 0;
		goto done;
	    }
	}
    } else if (eventFlags == 0) {
	Tcl_SetResult(interp, "no event type or button # or keysym",
		TCL_STATIC);
	count = 0;
	goto done;
    }

    while ((*p == '-') || isspace(UCHAR(*p))) {
	p++;
    }
    if (*p != '>') {
	while (*p != '\0') {
	    p++;
	    if (*p == '>') {
		Tcl_SetResult(interp,
			"extra characters after detail in binding",
			TCL_STATIC);
		count = 0;
		goto done;
	    }
	}
	Tcl_SetResult(interp, "missing \">\" in binding", TCL_STATIC);
	count = 0;
	goto done;
    }
    p++;

  end:
    *eventStringPtr += (p - Tcl_DStringValue(&copy));
    *eventMaskPtr |= eventMask;
  done:
    Tcl_DStringFree(&copy);
    return count;
}

/*
 *----------------------------------------------------------------------
 *
 * GetField --
 *
 *	Used to parse pattern descriptions. Copies up to size characters from
 *	p to copy, stopping at end of string, space, "-", ">", or whenever
 *	size is exceeded.
 *
 * Results:
 *	The return value is a pointer to the character just after the last one
 *	copied (usually "-" or space or ">", but could be anything if size was
 *	exceeded). Also places NULL-terminated string (up to size character,
 *	including NULL), at copy.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

static char *
GetField(
    char *p,			/* Pointer to part of pattern. */
    char *copy,			/* Place to copy field. */
    int size)			/* Maximum number of characters to copy. */
{
    while ((*p != '\0') && !isspace(UCHAR(*p)) && (*p != '>')
	    && (*p != '-') && (size > 1)) {
	*copy = *p;
	p++;
	copy++;
	size--;
    }
    *copy = '\0';
    return p;
}

/*
 *---------------------------------------------------------------------------
 *
 * GetPatternString --
 *
 *	Produce a string version of the given event, for displaying to the
 *	user.
 *
 * Results:
 *	The string is left in dsPtr.
 *
 * Side effects:
 *	It is the caller's responsibility to initialize the DString before and
 *	to free it after calling this function.
 *
 *---------------------------------------------------------------------------
 */

static void
GetPatternString(
    PatSeq *psPtr,
    Tcl_DString *dsPtr)
{
    Pattern *patPtr;
    char c, buffer[TCL_INTEGER_SPACE];
    int patsLeft, needMods;
    const ModInfo *modPtr;
    const EventInfo *eiPtr;

    /*
     * The order of the patterns in the sequence is backwards from the order
     * in which they must be output.
     */

    for (patsLeft = psPtr->numPats, patPtr = &psPtr->pats[psPtr->numPats - 1];
	    patsLeft > 0; patsLeft--, patPtr--) {
	/*
	 * Check for simple case of an ASCII character.
	 */

	if ((patPtr->eventType == KeyPress)
		&& ((psPtr->flags & PAT_NEARBY) == 0)
		&& (patPtr->needMods == 0)
		&& (patPtr->detail.keySym < 128)
		&& isprint(UCHAR(patPtr->detail.keySym))
		&& (patPtr->detail.keySym != '<')
		&& (patPtr->detail.keySym != ' ')) {
	    c = (char) patPtr->detail.keySym;
	    Tcl_DStringAppend(dsPtr, &c, 1);
	    continue;
	}

	/*
	 * Check for virtual event.
	 */

	if (patPtr->eventType == VirtualEvent) {
	    Tcl_DStringAppend(dsPtr, "<<", 2);
	    Tcl_DStringAppend(dsPtr, patPtr->detail.name, -1);
	    Tcl_DStringAppend(dsPtr, ">>", 2);
	    continue;
	}

	/*
	 * It's a more general event specification. First check for "Double",
	 * "Triple", "Quadruple", then modifiers, then event type, then keysym
	 * or button detail.
	 */

	Tcl_DStringAppend(dsPtr, "<", 1);

	if ((psPtr->flags & PAT_NEARBY) && (patsLeft > 1)
		&& (memcmp(patPtr, patPtr-1, sizeof(Pattern)) == 0)) {
	    patsLeft--;
	    patPtr--;
	    if ((patsLeft > 1) &&
		    (memcmp(patPtr, patPtr-1, sizeof(Pattern)) == 0)) {
		patsLeft--;
		patPtr--;
		if ((patsLeft > 1) &&
			(memcmp(patPtr, patPtr-1, sizeof(Pattern)) == 0)) {
		    patsLeft--;
		    patPtr--;
		    Tcl_DStringAppend(dsPtr, "Quadruple-", 10);
		} else {
		    Tcl_DStringAppend(dsPtr, "Triple-", 7);
		}
	    } else {
		Tcl_DStringAppend(dsPtr, "Double-", 7);
	    }
	}

	for (needMods = patPtr->needMods, modPtr = modArray;
		needMods != 0; modPtr++) {
	    if (modPtr->mask & needMods) {
		needMods &= ~modPtr->mask;
		Tcl_DStringAppend(dsPtr, modPtr->name, -1);
		Tcl_DStringAppend(dsPtr, "-", 1);
	    }
	}

	for (eiPtr = eventArray; eiPtr->name != NULL; eiPtr++) {
	    if (eiPtr->type == patPtr->eventType) {
		Tcl_DStringAppend(dsPtr, eiPtr->name, -1);
		if (patPtr->detail.clientData != 0) {
		    Tcl_DStringAppend(dsPtr, "-", 1);
		}
		break;
	    }
	}

	if (patPtr->detail.clientData != 0) {
	    if ((patPtr->eventType == KeyPress)
		    || (patPtr->eventType == KeyRelease)) {
		const char *string = TkKeysymToString(patPtr->detail.keySym);

		if (string != NULL) {
		    Tcl_DStringAppend(dsPtr, string, -1);
		}
	    } else {
		sprintf(buffer, "%d", patPtr->detail.button);
		Tcl_DStringAppend(dsPtr, buffer, -1);
	    }
	}

	Tcl_DStringAppend(dsPtr, ">", 1);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * TkStringToKeysym --
 *
 *	This function finds the keysym associated with a given keysym name.
 *
 * Results:
 *	The return value is the keysym that corresponds to name, or NoSymbol
 *	if there is no such keysym.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

KeySym
TkStringToKeysym(
    const char *name)		/* Name of a keysym. */
{
#ifdef REDO_KEYSYM_LOOKUP
    Tcl_HashEntry *hPtr = Tcl_FindHashEntry(&keySymTable, name);

    if (hPtr != NULL) {
	return (KeySym) Tcl_GetHashValue(hPtr);
    }
    if (strlen(name) == 1) {
	KeySym keysym = (KeySym) (unsigned char) name[0];

	if (TkKeysymToString(keysym) != NULL) {
	    return keysym;
	}
    }
#endif /* REDO_KEYSYM_LOOKUP */
    return XStringToKeysym(name);
}

/*
 *----------------------------------------------------------------------
 *
 * TkKeysymToString --
 *
 *	This function finds the keysym name associated with a given keysym.
 *
 * Results:
 *	The return value is a pointer to a static string containing the name
 *	of the given keysym, or NULL if there is no known name.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

const char *
TkKeysymToString(
    KeySym keysym)
{
#ifdef REDO_KEYSYM_LOOKUP
    Tcl_HashEntry *hPtr = Tcl_FindHashEntry(&nameTable, (char *)keysym);

    if (hPtr != NULL) {
	return Tcl_GetHashValue(hPtr);
    }
#endif /* REDO_KEYSYM_LOOKUP */

    return XKeysymToString(keysym);
}

/*
 *----------------------------------------------------------------------
 *
 * TkpGetBindingXEvent --
 *
 *	This function returns the XEvent associated with the currently
 *	executing binding. This function can only be invoked while a binding
 *	is executing.
 *
 * Results:
 *	Returns a pointer to the XEvent that caused the current binding code
 *	to be run.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

XEvent *
TkpGetBindingXEvent(
    Tcl_Interp *interp)		/* Interpreter. */
{
   TkWindow *winPtr = (TkWindow *) Tk_MainWindow(interp);
   BindingTable *bindPtr = winPtr->mainPtr->bindingTable;

   return &(bindPtr->eventRing[bindPtr->curEvent]);
}

/*
 * Local Variables:
 * mode: c
 * c-basic-offset: 4
 * fill-column: 78
 * End:
 */