Source

mozilla-central / widget / src / cocoa / nsChildView.mm

The fennec branch has multiple heads

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
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499
4500
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
4522
4523
4524
4525
4526
4527
4528
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
4575
4576
4577
4578
4579
4580
4581
4582
4583
4584
4585
4586
4587
4588
4589
4590
4591
4592
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
4616
4617
4618
4619
4620
4621
4622
4623
4624
4625
4626
4627
4628
4629
4630
4631
4632
4633
4634
4635
4636
4637
4638
4639
4640
4641
4642
4643
4644
4645
4646
4647
4648
4649
4650
4651
4652
4653
4654
4655
4656
4657
4658
4659
4660
4661
4662
4663
4664
4665
4666
4667
4668
4669
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
4687
4688
4689
4690
4691
4692
4693
4694
4695
4696
4697
4698
4699
4700
4701
4702
4703
4704
4705
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715
4716
4717
4718
4719
4720
4721
4722
4723
4724
4725
4726
4727
4728
4729
4730
4731
4732
4733
4734
4735
4736
4737
4738
4739
4740
4741
4742
4743
4744
4745
4746
4747
4748
4749
4750
4751
4752
4753
4754
4755
4756
4757
4758
4759
4760
4761
4762
4763
4764
4765
4766
4767
4768
4769
4770
4771
4772
4773
4774
4775
4776
4777
4778
4779
4780
4781
4782
4783
4784
4785
4786
4787
4788
4789
4790
4791
4792
4793
4794
4795
4796
4797
4798
4799
4800
4801
4802
4803
4804
4805
4806
4807
4808
4809
4810
4811
4812
4813
4814
4815
4816
4817
4818
4819
4820
4821
4822
4823
4824
4825
4826
4827
4828
4829
4830
4831
4832
4833
4834
4835
4836
4837
4838
4839
4840
4841
4842
4843
4844
4845
4846
4847
4848
4849
4850
4851
4852
4853
4854
4855
4856
4857
4858
4859
4860
4861
4862
4863
4864
4865
4866
4867
4868
4869
4870
4871
4872
4873
4874
4875
4876
4877
4878
4879
4880
4881
4882
4883
4884
4885
4886
4887
4888
4889
4890
4891
4892
4893
4894
4895
4896
4897
4898
4899
4900
4901
4902
4903
4904
4905
4906
4907
4908
4909
4910
4911
4912
4913
4914
4915
4916
4917
4918
4919
4920
4921
4922
4923
4924
4925
4926
4927
4928
4929
4930
4931
4932
4933
4934
4935
4936
4937
4938
4939
4940
4941
4942
4943
4944
4945
4946
4947
4948
4949
4950
4951
4952
4953
4954
4955
4956
4957
4958
4959
4960
4961
4962
4963
4964
4965
4966
4967
4968
4969
4970
4971
4972
4973
4974
4975
4976
4977
4978
4979
4980
4981
4982
4983
4984
4985
4986
4987
4988
4989
4990
4991
4992
4993
4994
4995
4996
4997
4998
4999
5000
5001
5002
5003
5004
5005
5006
5007
5008
5009
5010
5011
5012
5013
5014
5015
5016
5017
5018
5019
5020
5021
5022
5023
5024
5025
5026
5027
5028
5029
5030
5031
5032
5033
5034
5035
5036
5037
5038
5039
5040
5041
5042
5043
5044
5045
5046
5047
5048
5049
5050
5051
5052
5053
5054
5055
5056
5057
5058
5059
5060
5061
5062
5063
5064
5065
5066
5067
5068
5069
5070
5071
5072
5073
5074
5075
5076
5077
5078
5079
5080
5081
5082
5083
5084
5085
5086
5087
5088
5089
5090
5091
5092
5093
5094
5095
5096
5097
5098
5099
5100
5101
5102
5103
5104
5105
5106
5107
5108
5109
5110
5111
5112
5113
5114
5115
5116
5117
5118
5119
5120
5121
5122
5123
5124
5125
5126
5127
5128
5129
5130
5131
5132
5133
5134
5135
5136
5137
5138
5139
5140
5141
5142
5143
5144
5145
5146
5147
5148
5149
5150
5151
5152
5153
5154
5155
5156
5157
5158
5159
5160
5161
5162
5163
5164
5165
/* -*- Mode: objc; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is 
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Josh Aas <josh@mozilla.com>
 *   Mark Mentovai <mark@moxienet.com>
 *   Håkan Waara <hwaara@gmail.com>
 *   Stuart Morgan <stuart.morgan@alumni.case.edu>
 *   Mats Palmgren <matspal@gmail.com>
 *   Thomas K. Dyas <tdyas@zecador.org>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or 
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#ifdef MOZ_LOGGING
#define FORCE_PR_LOG
#endif
#include "prlog.h"

#include <unistd.h>
#include <math.h>
 
#include "nsChildView.h"
#include "nsCocoaWindow.h"

#include "nsObjCExceptions.h"
#include "nsCOMPtr.h"
#include "nsToolkit.h"
#include "nsCRT.h"

#include "nsFontMetrics.h"
#include "nsIRollupListener.h"
#include "nsIViewManager.h"
#include "nsIInterfaceRequestor.h"
#include "nsILocalFile.h"
#include "nsILocalFileMac.h"
#include "nsGfxCIID.h"
#include "nsIMenuRollup.h"
#include "nsIDOMSimpleGestureEvent.h"
#include "nsNPAPIPluginInstance.h"
#include "nsThemeConstants.h"

#include "nsDragService.h"
#include "nsClipboard.h"
#include "nsCursorManager.h"
#include "nsWindowMap.h"
#include "nsCocoaUtils.h"
#include "nsMenuUtilsX.h"
#include "nsMenuBarX.h"
#ifdef __LP64__
#include "ComplexTextInputPanel.h"
#endif

#include "gfxContext.h"
#include "gfxQuartzSurface.h"
#include "nsRegion.h"
#include "Layers.h"
#include "LayerManagerOGL.h"
#include "GLContext.h"

#include "mozilla/Preferences.h"

#include <dlfcn.h>

#include <ApplicationServices/ApplicationServices.h>

using namespace mozilla::layers;
using namespace mozilla::gl;
using namespace mozilla::widget;
using namespace mozilla;

#undef DEBUG_UPDATE
#undef INVALIDATE_DEBUGGING  // flash areas as they are invalidated

// Don't put more than this many rects in the dirty region, just fluff
// out to the bounding-box if there are more
#define MAX_RECTS_IN_REGION 100

#ifdef PR_LOGGING
PRLogModuleInfo* sCocoaLog = nsnull;
#endif

extern "C" {
  CG_EXTERN void CGContextResetCTM(CGContextRef);
  CG_EXTERN void CGContextSetCTM(CGContextRef, CGAffineTransform);
  CG_EXTERN void CGContextResetClip(CGContextRef);
}

// defined in nsMenuBarX.mm
extern NSMenu* sApplicationMenu; // Application menu shared by all menubars

// these are defined in nsCocoaWindow.mm
extern PRBool gConsumeRollupEvent;

PRBool gChildViewMethodsSwizzled = PR_FALSE;

extern nsISupportsArray *gDraggedTransferables;

ChildView* ChildViewMouseTracker::sLastMouseEventView = nil;
NSEvent* ChildViewMouseTracker::sLastMouseMoveEvent = nil;
NSWindow* ChildViewMouseTracker::sWindowUnderMouse = nil;
NSPoint ChildViewMouseTracker::sLastScrollEventScreenLocation = NSZeroPoint;

#ifdef INVALIDATE_DEBUGGING
static void blinkRect(Rect* r);
static void blinkRgn(RgnHandle rgn);
#endif

nsIRollupListener * gRollupListener = nsnull;
nsIMenuRollup     * gMenuRollup = nsnull;
nsIWidget         * gRollupWidget   = nsnull;

PRBool gUserCancelledDrag = PR_FALSE;

PRUint32 nsChildView::sLastInputEventCount = 0;

@interface ChildView(Private)

// sets up our view, attaching it to its owning gecko view
- (id)initWithFrame:(NSRect)inFrame geckoChild:(nsChildView*)inChild;
- (void)forceRefreshOpenGL;

// do generic gecko event setup with a generic cocoa event. accepts nil inEvent.
- (void) convertGenericCocoaEvent:(NSEvent*)inEvent toGeckoEvent:(nsInputEvent*)outGeckoEvent;

// set up a gecko mouse event based on a cocoa mouse event
- (void) convertCocoaMouseEvent:(NSEvent*)aMouseEvent toGeckoEvent:(nsInputEvent*)outGeckoEvent;

- (NSMenu*)contextMenu;

- (void)setIsPluginView:(BOOL)aIsPlugin;
- (void)setPluginEventModel:(NPEventModel)eventModel;
- (void)setPluginDrawingModel:(NPDrawingModel)drawingModel;
- (NPDrawingModel)pluginDrawingModel;

- (BOOL)isRectObscuredBySubview:(NSRect)inRect;

- (void)processPendingRedraws;

- (void)drawRect:(NSRect)aRect inContext:(CGContextRef)aContext;

// Called using performSelector:withObject:afterDelay:0 to release
// aWidgetArray (and its contents) the next time through the run loop.
- (void)releaseWidgets:(NSArray*)aWidgetArray;

#if USE_CLICK_HOLD_CONTEXTMENU
 // called on a timer two seconds after a mouse down to see if we should display
 // a context menu (click-hold)
- (void)clickHoldCallback:(id)inEvent;
#endif

#ifdef ACCESSIBILITY
- (id<mozAccessible>)accessible;
#endif

- (BOOL)inactiveWindowAcceptsMouseEvent:(NSEvent*)aEvent;

@end

#pragma mark -

/* Convenience routines to go from a gecko rect to cocoa NSRects and back
 *
 * Gecko rects (nsRect) contain an origin (x,y) in a coordinate
 * system with (0,0) in the top-left of the screen. Cocoa rects
 * (NSRect) contain an origin (x,y) in a coordinate system with
 * (0,0) in the bottom-left of the screen. Both nsRect and NSRect
 * contain width/height info, with no difference in their use.
 * If a Cocoa rect is from a flipped view, there is no need to
 * convert coordinate systems.
 */

static inline void
NSRectToGeckoRect(const NSRect & inCocoaRect, nsIntRect & outGeckoRect)
{
  outGeckoRect.x = NSToIntRound(inCocoaRect.origin.x);
  outGeckoRect.y = NSToIntRound(inCocoaRect.origin.y);
  outGeckoRect.width = NSToIntRound(inCocoaRect.origin.x + inCocoaRect.size.width) - outGeckoRect.x;
  outGeckoRect.height = NSToIntRound(inCocoaRect.origin.y + inCocoaRect.size.height) - outGeckoRect.y;
}

static inline void 
ConvertGeckoRectToMacRect(const nsIntRect& aRect, Rect& outMacRect)
{
  outMacRect.left = aRect.x;
  outMacRect.top = aRect.y;
  outMacRect.right = aRect.x + aRect.width;
  outMacRect.bottom = aRect.y + aRect.height;
}

// Flips a screen coordinate from a point in the cocoa coordinate system (bottom-left rect) to a point
// that is a "flipped" cocoa coordinate system (starts in the top-left).
static inline void
FlipCocoaScreenCoordinate(NSPoint &inPoint)
{  
  inPoint.y = nsCocoaUtils::FlippedScreenY(inPoint.y);
}

void EnsureLogInitialized()
{
#ifdef PR_LOGGING
  if (!sCocoaLog) {
    sCocoaLog = PR_NewLogModule("nsCocoaWidgets");
  }
#endif // PR_LOGGING
}

#pragma mark -

nsChildView::nsChildView() : nsBaseWidget()
, mView(nsnull)
, mParentView(nsnull)
, mParentWidget(nsnull)
, mVisible(PR_FALSE)
, mDrawing(PR_FALSE)
, mPluginDrawing(PR_FALSE)
, mIsDispatchPaint(PR_FALSE)
, mPluginInstanceOwner(nsnull)
{
  EnsureLogInitialized();

  memset(&mPluginCGContext, 0, sizeof(mPluginCGContext));
#ifndef NP_NO_QUICKDRAW
  memset(&mPluginQDPort, 0, sizeof(mPluginQDPort));
#endif

  SetBackgroundColor(NS_RGB(255, 255, 255));
  SetForegroundColor(NS_RGB(0, 0, 0));
}

nsChildView::~nsChildView()
{
  // Notify the children that we're gone.  childView->ResetParent() can change
  // our list of children while it's being iterated, so the way we iterate the
  // list must allow for this.
  for (nsIWidget* kid = mLastChild; kid;) {
    nsChildView* childView = static_cast<nsChildView*>(kid);
    kid = kid->GetPrevSibling();
    childView->ResetParent();
  }

  NS_WARN_IF_FALSE(mOnDestroyCalled, "nsChildView object destroyed without calling Destroy()");

  mResizerImage = nsnull;

  // An nsChildView object that was in use can be destroyed without Destroy()
  // ever being called on it.  So we also need to do a quick, safe cleanup
  // here (it's too late to just call Destroy(), which can cause crashes).
  // It's particularly important to make sure widgetDestroyed is called on our
  // mView -- this method NULLs mView's mGeckoChild, and NULL checks on
  // mGeckoChild are used throughout the ChildView class to tell if it's safe
  // to use a ChildView object.
  [mView widgetDestroyed]; // Safe if mView is nil.
  mParentWidget = nil;
  TearDownView(); // Safe if called twice.
}

NS_IMPL_ISUPPORTS_INHERITED1(nsChildView, nsBaseWidget, nsIPluginWidget)

nsresult nsChildView::Create(nsIWidget *aParent,
                             nsNativeWidget aNativeParent,
                             const nsIntRect &aRect,
                             EVENT_CALLBACK aHandleEventFunction,
                             nsDeviceContext *aContext,
                             nsIAppShell *aAppShell,
                             nsIToolkit *aToolkit,
                             nsWidgetInitData *aInitData)
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

  // Because the hidden window is created outside of an event loop,
  // we need to provide an autorelease pool to avoid leaking cocoa objects
  // (see bug 559075).
  nsAutoreleasePool localPool;

  // See NSView (MethodSwizzling) below.
  if (!gChildViewMethodsSwizzled) {
    nsToolkit::SwizzleMethods([NSView class], @selector(mouseDownCanMoveWindow),
                              @selector(nsChildView_NSView_mouseDownCanMoveWindow));
#ifdef __LP64__
    if (nsToolkit::OnLionOrLater()) {
      nsToolkit::SwizzleMethods([NSEvent class], @selector(addLocalMonitorForEventsMatchingMask:handler:),
                                @selector(nsChildView_NSEvent_addLocalMonitorForEventsMatchingMask:handler:),
                                PR_TRUE);
      nsToolkit::SwizzleMethods([NSEvent class], @selector(removeMonitor:),
                                @selector(nsChildView_NSEvent_removeMonitor:), PR_TRUE);
    }
#endif
#ifndef NP_NO_CARBON
    TextInputHandler::SwizzleMethods();
#endif
    gChildViewMethodsSwizzled = PR_TRUE;
  }

  mBounds = aRect;

  BaseCreate(aParent, aRect, aHandleEventFunction, 
             aContext, aAppShell, aToolkit, aInitData);

  // inherit things from the parent view and create our parallel 
  // NSView in the Cocoa display system
  mParentView = nil;
  if (aParent) {
    // This is the case when we're the popup content view of a popup window.
    SetBackgroundColor(aParent->GetBackgroundColor());
    SetForegroundColor(aParent->GetForegroundColor());

    // inherit the top-level window. NS_NATIVE_WIDGET is always a NSView
    // regardless of if we're asking a window or a view (for compatibility
    // with windows).
    mParentView = (NSView*)aParent->GetNativeData(NS_NATIVE_WIDGET); 
    mParentWidget = aParent;   
  } else {
    // This is the normal case. When we're the root widget of the view hiararchy,
    // aNativeParent will be the contentView of our window, since that's what
    // nsCocoaWindow returns when asked for an NS_NATIVE_VIEW.
    mParentView = reinterpret_cast<NSView*>(aNativeParent);
  }
  
  // create our parallel NSView and hook it up to our parent. Recall
  // that NS_NATIVE_WIDGET is the NSView.
  NSRect r;
  nsCocoaUtils::GeckoRectToNSRect(mBounds, r);
  mView = [CreateCocoaView(r) retain];
  if (!mView) return NS_ERROR_FAILURE;

  [(ChildView*)mView setIsPluginView:(mWindowType == eWindowType_plugin)];

  // If this view was created in a Gecko view hierarchy, the initial state
  // is hidden.  If the view is attached only to a native NSView but has
  // no Gecko parent (as in embedding), the initial state is visible.
  if (mParentWidget)
    [mView setHidden:YES];
  else
    mVisible = PR_TRUE;

  // Hook it up in the NSView hierarchy.
  if (mParentView) {
    [mParentView addSubview:mView];
  }

  // if this is a ChildView, make sure that our per-window data
  // is set up
  if ([mView isKindOfClass:[ChildView class]])
    [[WindowDataMap sharedWindowDataMap] ensureDataForWindow:[mView window]];

  NS_ASSERTION(!mTextInputHandler, "mTextInputHandler has already existed");
  mTextInputHandler = new TextInputHandler(this, mView);

  return NS_OK;

  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}

// Creates the appropriate child view. Override to create something other than
// our |ChildView| object. Autoreleases, so caller must retain.
NSView*
nsChildView::CreateCocoaView(NSRect inFrame)
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;

  return [[[ChildView alloc] initWithFrame:inFrame geckoChild:this] autorelease];

  NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}

void nsChildView::TearDownView()
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  if (!mView)
    return;

  NSWindow* win = [mView window];
  NSResponder* responder = [win firstResponder];

  // We're being unhooked from the view hierarchy, don't leave our view
  // or a child view as the window first responder.
  if (responder && [responder isKindOfClass:[NSView class]] &&
      [(NSView*)responder isDescendantOf:mView]) {
    [win makeFirstResponder:[mView superview]];
  }

  // If mView is win's contentView, win (mView's NSWindow) "owns" mView --
  // win has retained mView, and will detach it from the view hierarchy and
  // release it when necessary (when win is itself destroyed (in a call to
  // [win dealloc])).  So all we need to do here is call [mView release] (to
  // match the call to [mView retain] in nsChildView::StandardCreate()).
  // Also calling [mView removeFromSuperviewWithoutNeedingDisplay] causes
  // mView to be released again and dealloced, while remaining win's
  // contentView.  So if we do that here, win will (for a short while) have
  // an invalid contentView (for the consequences see bmo bugs 381087 and
  // 374260).
  if ([mView isEqual:[win contentView]]) {
    [mView release];
  } else {
    // Stop NSView hierarchy being changed during [ChildView drawRect:]
    [mView performSelectorOnMainThread:@selector(delayedTearDown) withObject:nil waitUntilDone:false];
  }
  mView = nil;

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

nsCocoaWindow*
nsChildView::GetXULWindowWidget()
{
  id windowDelegate = [[mView window] delegate];
  if (windowDelegate && [windowDelegate isKindOfClass:[WindowDelegate class]]) {
    return [(WindowDelegate *)windowDelegate geckoWidget];
  }
  return nsnull;
}

NS_IMETHODIMP nsChildView::Destroy()
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

  if (mOnDestroyCalled)
    return NS_OK;
  mOnDestroyCalled = PR_TRUE;

  [mView widgetDestroyed];

  nsBaseWidget::Destroy();

  ReportDestroyEvent(); 
  mParentWidget = nil;

  TearDownView();

  nsBaseWidget::OnDestroy();

  return NS_OK;

  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}

#pragma mark -

#if 0
static void PrintViewHierarchy(NSView *view)
{
  while (view) {
    NSLog(@"  view is %x, frame %@", view, NSStringFromRect([view frame]));
    view = [view superview];
  }
}
#endif

// Return native data according to aDataType
void* nsChildView::GetNativeData(PRUint32 aDataType)
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSNULL;

  void* retVal = nsnull;

  switch (aDataType) 
  {
    case NS_NATIVE_WIDGET:
    case NS_NATIVE_DISPLAY:
      retVal = (void*)mView;
      break;

    case NS_NATIVE_WINDOW:
      retVal = [mView window];
      break;

    case NS_NATIVE_GRAPHIC:
      NS_ERROR("Requesting NS_NATIVE_GRAPHIC on a Mac OS X child view!");
      retVal = nsnull;
      break;

    case NS_NATIVE_OFFSETX:
      retVal = 0;
      break;

    case NS_NATIVE_OFFSETY:
      retVal = 0;
      break;

    case NS_NATIVE_PLUGIN_PORT:
    case NS_NATIVE_PLUGIN_PORT_QD:
    case NS_NATIVE_PLUGIN_PORT_CG:
    {
      // The NP_CGContext pointer should always be NULL in the Cocoa event model.
      if ([(ChildView*)mView pluginEventModel] == NPEventModelCocoa)
        return nsnull;

      UpdatePluginPort();
#ifndef NP_NO_QUICKDRAW
      if (aDataType != NS_NATIVE_PLUGIN_PORT_CG) {
        retVal = (void*)&mPluginQDPort;
        break;
      }
#endif
      retVal = (void*)&mPluginCGContext;
      break;
    }
  }

  return retVal;

  NS_OBJC_END_TRY_ABORT_BLOCK_NSNULL;
}

#pragma mark -

nsTransparencyMode nsChildView::GetTransparencyMode()
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN;

  nsCocoaWindow* windowWidget = GetXULWindowWidget();
  return windowWidget ? windowWidget->GetTransparencyMode() : eTransparencyOpaque;

  NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(eTransparencyOpaque);
}

// This is called by nsContainerFrame on the root widget for all window types
// except popup windows (when nsCocoaWindow::SetTransparencyMode is used instead).
void nsChildView::SetTransparencyMode(nsTransparencyMode aMode)
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  nsCocoaWindow* windowWidget = GetXULWindowWidget();
  if (windowWidget) {
    windowWidget->SetTransparencyMode(aMode);
  }

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

NS_IMETHODIMP nsChildView::IsVisible(PRBool& outState)
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

  if (!mVisible) {
    outState = mVisible;
  }
  else {
    // mVisible does not accurately reflect the state of a hidden tabbed view
    // so verify that the view has a window as well
    outState = ([mView window] != nil);
    // now check native widget hierarchy visibility
    if (outState && NSIsEmptyRect([mView visibleRect])) {
      outState = PR_FALSE;
    }
  }

  return NS_OK;

  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}

void nsChildView::HidePlugin()
{
  NS_ASSERTION(mWindowType == eWindowType_plugin,
               "HidePlugin called on non-plugin view");

#ifndef NP_NO_QUICKDRAW
  if (mPluginInstanceOwner && mView &&
      [(ChildView*)mView pluginDrawingModel] == NPDrawingModelQuickDraw) {
    NPWindow* window;
    mPluginInstanceOwner->GetWindow(window);
    nsRefPtr<nsNPAPIPluginInstance> instance;
    mPluginInstanceOwner->GetInstance(getter_AddRefs(instance));
    if (window && instance) {
       window->clipRect.top = 0;
       window->clipRect.left = 0;
       window->clipRect.bottom = 0;
       window->clipRect.right = 0;
       instance->SetWindow(window);
    }
  }
#endif
}

void nsChildView::UpdatePluginPort()
{
  NS_ASSERTION(mWindowType == eWindowType_plugin,
               "UpdatePluginPort called on non-plugin view");

#if !defined(NP_NO_CARBON) || !defined(NP_NO_QUICKDRAW)
  NSWindow* cocoaWindow = [mView window];
  WindowRef carbonWindow = cocoaWindow ? (WindowRef)[cocoaWindow windowRef] : NULL;
#endif

  if (!mView
#ifndef NP_NO_QUICKDRAW
    || [(ChildView*)mView pluginDrawingModel] != NPDrawingModelQuickDraw
#endif
    ) {
    // [NSGraphicsContext currentContext] is supposed to "return the
    // current graphics context of the current thread."  But sometimes
    // (when called while mView isn't focused for drawing) it returns a
    // graphics context for the wrong window.  [window graphicsContext]
    // (which "provides the graphics context associated with the window
    // for the current thread") seems always to return the "right"
    // graphics context.  See bug 500130.
    mPluginCGContext.context = NULL;
    mPluginCGContext.window = NULL;
#ifndef NP_NO_CARBON
    if (carbonWindow) {
      mPluginCGContext.context = (CGContextRef)[[cocoaWindow graphicsContext] graphicsPort];
      mPluginCGContext.window = carbonWindow;
    }
#endif
  }
#ifndef NP_NO_QUICKDRAW
  else {
    if (carbonWindow) {
      mPluginQDPort.port = ::GetWindowPort(carbonWindow);

      NSPoint viewOrigin = [mView convertPoint:NSZeroPoint toView:nil];
      NSRect frame = [[cocoaWindow contentView] frame];
      viewOrigin.y = frame.size.height - viewOrigin.y;

      // need to convert view's origin to window coordinates.
      // then, encode as "SetOrigin" ready values.
      mPluginQDPort.portx = (PRInt32)-viewOrigin.x;
      mPluginQDPort.porty = (PRInt32)-viewOrigin.y;
    } else {
      mPluginQDPort.port = NULL;
    }
  }
#endif
}

static void HideChildPluginViews(NSView* aView)
{
  NSArray* subviews = [aView subviews];

  for (unsigned int i = 0; i < [subviews count]; ++i) {
    NSView* view = [subviews objectAtIndex: i];

    if (![view isKindOfClass:[ChildView class]])
      continue;

    ChildView* childview = static_cast<ChildView*>(view);
    if ([childview isPluginView]) {
      nsChildView* widget = static_cast<nsChildView*>([childview widget]);
      if (widget) {
        widget->HidePlugin();
      }
    } else {
      HideChildPluginViews(view);
    }
  }
}

// Hide or show this component
NS_IMETHODIMP nsChildView::Show(PRBool aState)
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

  if (aState != mVisible) {
    // Provide an autorelease pool because this gets called during startup
    // on the "hidden window", resulting in cocoa object leakage if there's
    // no pool in place.
    nsAutoreleasePool localPool;

    [mView setHidden:!aState];
    mVisible = aState;
    if (!mVisible && IsPluginView())
      HidePlugin();
  }
  return NS_OK;

  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}

// Change the parent of this widget
NS_IMETHODIMP
nsChildView::SetParent(nsIWidget* aNewParent)
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

  NS_ENSURE_ARG(aNewParent);

  if (mOnDestroyCalled)
    return NS_OK;

  // make sure we stay alive
  nsCOMPtr<nsIWidget> kungFuDeathGrip(this);
  
  // remove us from our existing parent
  if (mParentWidget)
    mParentWidget->RemoveChild(this);

  nsresult rv = ReparentNativeWidget(aNewParent);
  if (NS_SUCCEEDED(rv))
    mParentWidget = aNewParent;

  // add us to the new parent
  mParentWidget->AddChild(this);
  return NS_OK;
  
  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}

NS_IMETHODIMP
nsChildView::ReparentNativeWidget(nsIWidget* aNewParent)
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

  NS_PRECONDITION(aNewParent, "");

  if (mOnDestroyCalled)
    return NS_OK;

  NSView<mozView>* newParentView =
   (NSView*)aNewParent->GetNativeData(NS_NATIVE_WIDGET); 
  NS_ENSURE_TRUE(newParentView, NS_ERROR_FAILURE);

  // we hold a ref to mView, so this is safe
  [mView removeFromSuperview];
  mParentView   = newParentView;
  [mParentView addSubview:mView];
  return NS_OK;

  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}

void nsChildView::ResetParent()
{
  if (!mOnDestroyCalled) {
    if (mParentWidget)
      mParentWidget->RemoveChild(this);
    if (mView)
      [mView removeFromSuperview];
  }
  mParentWidget = nsnull;
}

nsIWidget*
nsChildView::GetParent()
{
  return mParentWidget;
}

float
nsChildView::GetDPI()
{
  NSWindow* window = [mView window];
  if (window && [window isKindOfClass:[BaseWindow class]]) {
    return [(BaseWindow*)window getDPI];
  }

  return 96.0;
}

NS_IMETHODIMP nsChildView::Enable(PRBool aState)
{
  return NS_OK;
}

NS_IMETHODIMP nsChildView::IsEnabled(PRBool *aState)
{
  // unimplemented
  if (aState)
   *aState = PR_TRUE;
  return NS_OK;
}

NS_IMETHODIMP nsChildView::SetFocus(PRBool aRaise)
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

  NSWindow* window = [mView window];
  if (window)
    [window makeFirstResponder:mView];
  return NS_OK;

  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}

// Override to set the cursor on the mac
NS_IMETHODIMP nsChildView::SetCursor(nsCursor aCursor)
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

  if ([mView isDragInProgress])
    return NS_OK; // Don't change the cursor during dragging.

  nsBaseWidget::SetCursor(aCursor);
  return [[nsCursorManager sharedInstance] setCursor:aCursor];

  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}

// implement to fix "hidden virtual function" warning
NS_IMETHODIMP nsChildView::SetCursor(imgIContainer* aCursor,
                                      PRUint32 aHotspotX, PRUint32 aHotspotY)
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

  nsBaseWidget::SetCursor(aCursor, aHotspotX, aHotspotY);
  return [[nsCursorManager sharedInstance] setCursorWithImage:aCursor hotSpotX:aHotspotX hotSpotY:aHotspotY];

  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}

#pragma mark -

// Get this component dimension
NS_IMETHODIMP nsChildView::GetBounds(nsIntRect &aRect)
{
  if (!mView) {
    aRect = mBounds;
  } else {
    NSRect frame = [mView frame];
    NSRectToGeckoRect(frame, aRect);
  }
  return NS_OK;
}

NS_IMETHODIMP nsChildView::ConstrainPosition(PRBool aAllowSlop,
                                             PRInt32 *aX, PRInt32 *aY)
{
  return NS_OK;
}

// Move this component, aX and aY are in the parent widget coordinate system
NS_IMETHODIMP nsChildView::Move(PRInt32 aX, PRInt32 aY)
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

  if (!mView || (mBounds.x == aX && mBounds.y == aY))
    return NS_OK;

  mBounds.x = aX;
  mBounds.y = aY;

  NSRect r;
  nsCocoaUtils::GeckoRectToNSRect(mBounds, r);
  [mView setFrame:r];

  if (mVisible)
    [mView setNeedsDisplay:YES];

  ReportMoveEvent();

  return NS_OK;

  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}

NS_IMETHODIMP nsChildView::Resize(PRInt32 aWidth, PRInt32 aHeight, PRBool aRepaint)
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

  if (!mView || (mBounds.width == aWidth && mBounds.height == aHeight))
    return NS_OK;

  mBounds.width  = aWidth;
  mBounds.height = aHeight;

  NSRect r;
  nsCocoaUtils::GeckoRectToNSRect(mBounds, r);
  [mView setFrame:r];

  if (mVisible && aRepaint)
    [mView setNeedsDisplay:YES];

  ReportSizeEvent();

  return NS_OK;

  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}

NS_IMETHODIMP nsChildView::Resize(PRInt32 aX, PRInt32 aY, PRInt32 aWidth, PRInt32 aHeight, PRBool aRepaint)
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

  BOOL isMoving = (mBounds.x != aX || mBounds.y != aY);
  BOOL isResizing = (mBounds.width != aWidth || mBounds.height != aHeight);
  if (!mView || (!isMoving && !isResizing))
    return NS_OK;

  if (isMoving) {
    mBounds.x = aX;
    mBounds.y = aY;
  }
  if (isResizing) {
    mBounds.width  = aWidth;
    mBounds.height = aHeight;
  }

  NSRect r;
  nsCocoaUtils::GeckoRectToNSRect(mBounds, r);
  [mView setFrame:r];

  if (mVisible && aRepaint)
    [mView setNeedsDisplay:YES];

  if (isMoving) {
    ReportMoveEvent();
    if (mOnDestroyCalled)
      return NS_OK;
  }
  if (isResizing)
    ReportSizeEvent();

  return NS_OK;

  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}

static const PRInt32 resizeIndicatorWidth = 15;
static const PRInt32 resizeIndicatorHeight = 15;
PRBool nsChildView::ShowsResizeIndicator(nsIntRect* aResizerRect)
{
  NSView *topLevelView = mView, *superView = nil;
  while ((superView = [topLevelView superview]))
    topLevelView = superView;

  if (![[topLevelView window] showsResizeIndicator] ||
      !([[topLevelView window] styleMask] & NSResizableWindowMask))
    return PR_FALSE;

  if (aResizerRect) {
    NSSize bounds = [topLevelView bounds].size;
    NSPoint corner = NSMakePoint(bounds.width, [topLevelView isFlipped] ? bounds.height : 0);
    corner = [topLevelView convertPoint:corner toView:mView];
    aResizerRect->SetRect(NSToIntRound(corner.x) - resizeIndicatorWidth,
                          NSToIntRound(corner.y) - resizeIndicatorHeight,
                          resizeIndicatorWidth, resizeIndicatorHeight);
  }
  return PR_TRUE;
}

// In QuickDraw mode the coordinate system used here should be that of the
// browser window's content region (defined as everything but the 22-pixel
// high titlebar).  But in CoreGraphics mode the coordinate system should be
// that of the browser window as a whole (including its titlebar).  Both
// coordinate systems have a top-left origin.  See bmo bug 474491.
//
// There's a bug in this method's code -- it currently uses the QuickDraw
// coordinate system for both the QuickDraw and CoreGraphics drawing modes.
// This bug is fixed by the patch for bug 474491.  But the Flash plugin (both
// version 10.0.12.36 from Adobe and version 9.0 r151 from Apple) has Mozilla-
// specific code to work around this bug, which breaks when we fix it (see bmo
// bug 477077).  So we'll need to coordinate releasing a fix for this bug with
// Adobe and other major plugin vendors that support the CoreGraphics mode.
NS_IMETHODIMP nsChildView::GetPluginClipRect(nsIntRect& outClipRect, nsIntPoint& outOrigin, PRBool& outWidgetVisible)
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

  NS_ASSERTION(mWindowType == eWindowType_plugin,
               "GetPluginClipRect must only be called on a plugin widget");
  if (mWindowType != eWindowType_plugin) return NS_ERROR_FAILURE;
  
  NSWindow* window = [mView window];
  if (!window) return NS_ERROR_FAILURE;
  
  NSPoint viewOrigin = [mView convertPoint:NSZeroPoint toView:nil];
  NSRect frame = [[window contentView] frame];
  viewOrigin.y = frame.size.height - viewOrigin.y;
  
  // set up the clipping region for plugins.
  NSRect visibleBounds = [mView visibleRect];
  NSPoint clipOrigin   = [mView convertPoint:visibleBounds.origin toView:nil];
  
  // Convert from cocoa to QuickDraw coordinates
  clipOrigin.y = frame.size.height - clipOrigin.y;
  
  outClipRect.x = NSToIntRound(clipOrigin.x);
  outClipRect.y = NSToIntRound(clipOrigin.y);

  // need to convert view's origin to window coordinates.
  // then, encode as "SetOrigin" ready values.
  outOrigin.x = -NSToIntRound(viewOrigin.x);
  outOrigin.y = -NSToIntRound(viewOrigin.y);

  PRBool isVisible;
  IsVisible(isVisible);
  if (isVisible && [mView window] != nil) {
    outClipRect.width  = NSToIntRound(visibleBounds.origin.x + visibleBounds.size.width) - NSToIntRound(visibleBounds.origin.x);
    outClipRect.height = NSToIntRound(visibleBounds.origin.y + visibleBounds.size.height) - NSToIntRound(visibleBounds.origin.y);

    if (mClipRects) {
      nsIntRect clipBounds;
      for (PRUint32 i = 0; i < mClipRectCount; ++i) {
        clipBounds.UnionRect(clipBounds, mClipRects[i]);
      }
      outClipRect.IntersectRect(outClipRect, clipBounds - outOrigin);
    }

    // XXXroc should this be !outClipRect.IsEmpty()?
    outWidgetVisible = PR_TRUE;
  }
  else {
    outClipRect.width = 0;
    outClipRect.height = 0;
    outWidgetVisible = PR_FALSE;
  }

  return NS_OK;

  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}

#ifndef NP_NO_CARBON
static void InitializeEventRecord(EventRecord* event, Point* aMousePosition)
{
  memset(event, 0, sizeof(EventRecord));
  if (aMousePosition) {
    event->where = *aMousePosition;
  } else {
    ::GetGlobalMouse(&event->where);
  }
  event->when = ::TickCount();
  event->modifiers = ::GetCurrentKeyModifiers();
}
#endif

void nsChildView::PaintQD()
{
#ifndef NP_NO_CARBON
  void *pluginPort = this->GetNativeData(NS_NATIVE_PLUGIN_PORT_QD);
  void *window = ::GetWindowFromPort(static_cast<NP_Port*>(pluginPort)->port);

  NS_SUCCEEDED(StartDrawPlugin());
  EventRecord updateEvent;
  InitializeEventRecord(&updateEvent, nsnull);
  updateEvent.what = updateEvt;
  updateEvent.message = UInt32(window);

  nsRefPtr<nsNPAPIPluginInstance> instance;
  mPluginInstanceOwner->GetInstance(getter_AddRefs(instance));

  instance->HandleEvent(&updateEvent, nsnull);
  EndDrawPlugin();
#endif
}

NS_IMETHODIMP nsChildView::StartDrawPlugin()
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

  NS_ASSERTION(mWindowType == eWindowType_plugin,
               "StartDrawPlugin must only be called on a plugin widget");
  if (mWindowType != eWindowType_plugin) return NS_ERROR_FAILURE;

  // This code is necessary for both Quickdraw and CoreGraphics in 32-bit builds.
  // See comments below about why. In 64-bit CoreGraphics mode we will not keep
  // this region up to date, plugins should not depend on it.
#ifndef __LP64__
  NSWindow* window = [mView window];
  if (!window)
    return NS_ERROR_FAILURE;

  // In QuickDraw drawing mode, prevent reentrant handling of any plugin event
  // (this emulates behavior on the 1.8 branch, where only QuickDraw mode is
  // supported).  But in CoreGraphics drawing mode only do this if the current
  // plugin event isn't an update/paint event.  This allows popupcontextmenu()
  // to work properly from a plugin that supports the Cocoa event model,
  // without regressing bug 409615.  See bug 435041.  (StartDrawPlugin() and
  // EndDrawPlugin() wrap every call to nsIPluginInstance::HandleEvent() --
  // not just calls that "draw" or paint.)
  PRBool isQDPlugin = [(ChildView*)mView pluginDrawingModel] == NPDrawingModelQuickDraw;
  if (isQDPlugin || mIsDispatchPaint) {
    if (mPluginDrawing)
      return NS_ERROR_FAILURE;
  }

  // It appears that the WindowRef from which we get the plugin port undergoes the
  // traditional BeginUpdate/EndUpdate cycle, which, if you recall, sets the visible
  // region to the intersection of the visible region and the update region. Since
  // we don't know here if we're being drawn inside a BeginUpdate/EndUpdate pair
  // (which seem to occur in [NSWindow display]), and we don't want to have the burden
  // of correctly doing Carbon invalidates of the plugin rect, we manually set the
  // visible region to be the entire port every time. It is necessary to set up our
  // window's port even for CoreGraphics plugins, because they may still use Carbon
  // internally (see bug #420527 for details).
  //
  // Don't use this code if any of the QuickDraw APIs it currently requires are
  // missing (as they probably will be on OS X 10.8 and up).
  if (::NewRgn && ::GetQDGlobalsThePort && ::GetGWorld && ::SetGWorld &&
      ::IsPortOffscreen && ::GetMainDevice && ::SetOrigin && ::RectRgn &&
      ::SetPortVisibleRegion && ::SetPortClipRegion && ::DisposeRgn) {
    CGrafPtr port = ::GetWindowPort(WindowRef([window windowRef]));
    if (isQDPlugin) {
      port = mPluginQDPort.port;
    }

    RgnHandle pluginRegion = ::NewRgn();
    if (pluginRegion) {
      PRBool portChanged = (port != CGrafPtr(::GetQDGlobalsThePort()));
      CGrafPtr oldPort;
      GDHandle oldDevice;

      if (portChanged) {
        ::GetGWorld(&oldPort, &oldDevice);
        ::SetGWorld(port, ::IsPortOffscreen(port) ? nsnull : ::GetMainDevice());
      }

      ::SetOrigin(0, 0);

      nsIntRect clipRect; // this is in native window coordinates
      nsIntPoint origin;
      PRBool visible;
      GetPluginClipRect(clipRect, origin, visible);

      // XXX if we're not visible, set an empty clip region?
      Rect pluginRect;
      ConvertGeckoRectToMacRect(clipRect, pluginRect);

      ::RectRgn(pluginRegion, &pluginRect);
      ::SetPortVisibleRegion(port, pluginRegion);
      ::SetPortClipRegion(port, pluginRegion);

      // now set up the origin for the plugin
      ::SetOrigin(origin.x, origin.y);

      ::DisposeRgn(pluginRegion);

      if (portChanged) {
        ::SetGWorld(oldPort, oldDevice);
      }
    }
  } else {
    NS_WARNING("Cannot set plugin's visible region -- required QuickDraw APIs are missing!");
  }
#endif

  mPluginDrawing = PR_TRUE;
  return NS_OK;

  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}

NS_IMETHODIMP nsChildView::EndDrawPlugin()
{
  NS_ASSERTION(mWindowType == eWindowType_plugin,
               "EndDrawPlugin must only be called on a plugin widget");
  if (mWindowType != eWindowType_plugin) return NS_ERROR_FAILURE;

  mPluginDrawing = PR_FALSE;
  return NS_OK;
}

NS_IMETHODIMP nsChildView::SetPluginInstanceOwner(nsIPluginInstanceOwner* aInstanceOwner)
{
  mPluginInstanceOwner = aInstanceOwner;

  return NS_OK;
}

NS_IMETHODIMP nsChildView::SetPluginEventModel(int inEventModel)
{
  [(ChildView*)mView setPluginEventModel:(NPEventModel)inEventModel];
  return NS_OK;
}

NS_IMETHODIMP nsChildView::GetPluginEventModel(int* outEventModel)
{
  *outEventModel = [(ChildView*)mView pluginEventModel];
  return NS_OK;
}

NS_IMETHODIMP nsChildView::SetPluginDrawingModel(int inDrawingModel)
{
  [(ChildView*)mView setPluginDrawingModel:(NPDrawingModel)inDrawingModel];
  return NS_OK;
}

NS_IMETHODIMP nsChildView::StartComplexTextInputForCurrentEvent()
{
  return mTextInputHandler->StartComplexTextInputForCurrentEvent();
}

nsresult nsChildView::SynthesizeNativeKeyEvent(PRInt32 aNativeKeyboardLayout,
                                               PRInt32 aNativeKeyCode,
                                               PRUint32 aModifierFlags,
                                               const nsAString& aCharacters,
                                               const nsAString& aUnmodifiedCharacters)
{
  return mTextInputHandler->SynthesizeNativeKeyEvent(aNativeKeyboardLayout,
                                                     aNativeKeyCode,
                                                     aModifierFlags,
                                                     aCharacters,
                                                     aUnmodifiedCharacters);
}

nsresult nsChildView::SynthesizeNativeMouseEvent(nsIntPoint aPoint,
                                                 PRUint32 aNativeMessage,
                                                 PRUint32 aModifierFlags)
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

  // Move the mouse cursor to the requested position and reconnect it to the mouse.
  CGWarpMouseCursorPosition(CGPointMake(aPoint.x, aPoint.y));
  CGAssociateMouseAndMouseCursorPosition(true);

  // aPoint is given with the origin on the top left, but convertScreenToBase
  // expects a point in a coordinate system that has its origin on the bottom left.
  NSPoint screenPoint = NSMakePoint(aPoint.x, [[NSScreen mainScreen] frame].size.height - aPoint.y);
  NSPoint windowPoint = [[mView window] convertScreenToBase:screenPoint];

  NSEvent* event = [NSEvent mouseEventWithType:aNativeMessage
                                      location:windowPoint
                                 modifierFlags:aModifierFlags
                                     timestamp:[NSDate timeIntervalSinceReferenceDate]
                                  windowNumber:[[mView window] windowNumber]
                                       context:nil
                                   eventNumber:0
                                    clickCount:1
                                      pressure:0.0];

  if (!event)
    return NS_ERROR_FAILURE;

  if ([[mView window] isKindOfClass:[BaseWindow class]]) {
    // Tracking area events don't end up in their tracking areas when sent
    // through [NSApp sendEvent:], so pass them directly to the right methods.
    BaseWindow* window = (BaseWindow*)[mView window];
    if (aNativeMessage == NSMouseEntered) {
      [window mouseEntered:event];
      return NS_OK;
    }
    if (aNativeMessage == NSMouseExited) {
      [window mouseExited:event];
      return NS_OK;
    }
    if (aNativeMessage == NSMouseMoved) {
      [window mouseMoved:event];
      return NS_OK;
    }
  }

  [NSApp sendEvent:event];
  return NS_OK;

  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}

// First argument has to be an NSMenu representing the application's top-level
// menu bar. The returned item is *not* retained.
static NSMenuItem* NativeMenuItemWithLocation(NSMenu* menubar, NSString* locationString)
{
  NSArray* indexes = [locationString componentsSeparatedByString:@"|"];
  unsigned int indexCount = [indexes count];
  if (indexCount == 0)
    return nil;

  NSMenu* currentSubmenu = [NSApp mainMenu];
  for (unsigned int i = 0; i < indexCount; i++) {
    int targetIndex;
    // We remove the application menu from consideration for the top-level menu
    if (i == 0)
      targetIndex = [[indexes objectAtIndex:i] intValue] + 1;
    else
      targetIndex = [[indexes objectAtIndex:i] intValue];
    int itemCount = [currentSubmenu numberOfItems];
    if (targetIndex < itemCount) {
      NSMenuItem* menuItem = [currentSubmenu itemAtIndex:targetIndex];
      // if this is the last index just return the menu item
      if (i == (indexCount - 1))
        return menuItem;
      // if this is not the last index find the submenu and keep going
      if ([menuItem hasSubmenu])
        currentSubmenu = [menuItem submenu];
      else
        return nil;
    }
  }

  return nil;
}

// Used for testing native menu system structure and event handling.
NS_IMETHODIMP nsChildView::ActivateNativeMenuItemAt(const nsAString& indexString)
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

  NSString* locationString = [NSString stringWithCharacters:indexString.BeginReading() length:indexString.Length()];
  NSMenuItem* item = NativeMenuItemWithLocation([NSApp mainMenu], locationString);
  // We can't perform an action on an item with a submenu, that will raise
  // an obj-c exception.
  if (item && ![item hasSubmenu]) {
    NSMenu* parent = [item menu];
    if (parent) {
      // NSLog(@"Performing action for native menu item titled: %@\n",
      //       [[currentSubmenu itemAtIndex:targetIndex] title]);
      [parent performActionForItemAtIndex:[parent indexOfItem:item]];
      return NS_OK;
    }
  }
  return NS_ERROR_FAILURE;

  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}

// Used for testing native menu system structure and event handling.
NS_IMETHODIMP nsChildView::ForceUpdateNativeMenuAt(const nsAString& indexString)
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

  nsCocoaWindow *widget = GetXULWindowWidget();
  if (widget) {
    nsMenuBarX* mb = widget->GetMenuBar();
    if (mb) {
      if (indexString.IsEmpty())
        mb->ForceNativeMenuReload();
      else
        mb->ForceUpdateNativeMenuAt(indexString);
    }
  }
  return NS_OK;

  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}

#pragma mark -

#ifdef INVALIDATE_DEBUGGING

static Boolean KeyDown(const UInt8 theKey)
{
  KeyMap map;
  GetKeys(map);
  return ((*((UInt8 *)map + (theKey >> 3)) >> (theKey & 7)) & 1) != 0;
}

static Boolean caps_lock()
{
  return KeyDown(0x39);
}

static void blinkRect(Rect* r)
{
  StRegionFromPool oldClip;
  if (oldClip != NULL)
    ::GetClip(oldClip);

  ::ClipRect(r);
  ::InvertRect(r);
  UInt32 end = ::TickCount() + 5;
  while (::TickCount() < end) ;
  ::InvertRect(r);

  if (oldClip != NULL)
    ::SetClip(oldClip);
}

static void blinkRgn(RgnHandle rgn)
{
  StRegionFromPool oldClip;
  if (oldClip != NULL)
    ::GetClip(oldClip);

  ::SetClip(rgn);
  ::InvertRgn(rgn);
  UInt32 end = ::TickCount() + 5;
  while (::TickCount() < end) ;
  ::InvertRgn(rgn);

  if (oldClip != NULL)
    ::SetClip(oldClip);
}

#endif

// Invalidate this component's visible area
NS_IMETHODIMP nsChildView::Invalidate(const nsIntRect &aRect, PRBool aIsSynchronous)
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

  if (!mView || !mVisible)
    return NS_OK;

  NSRect r;
  nsCocoaUtils::GeckoRectToNSRect(aRect, r);
  
  if (aIsSynchronous) {
    [mView displayRect:r];
  }
  else if ([NSView focusView]) {
    // if a view is focussed (i.e. being drawn), then postpone the invalidate so that we
    // don't lose it.
    [mView setNeedsPendingDisplayInRect:r];
  }
  else {
    [mView setNeedsDisplayInRect:r];
  }

  return NS_OK;

  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}

PRBool
nsChildView::GetShouldAccelerate()
{
  // Don't use OpenGL for transparent windows or for popup windows.
  if (!mView || ![[mView window] isOpaque] ||
      [[mView window] isKindOfClass:[PopupWindow class]])
    return PR_FALSE;

  return nsBaseWidget::GetShouldAccelerate();
}

inline PRUint16 COLOR8TOCOLOR16(PRUint8 color8)
{
  // return (color8 == 0xFF ? 0xFFFF : (color8 << 8));
  return (color8 << 8) | color8;  /* (color8 * 257) == (color8 * 0x0101) */
}

// The OS manages repaints well enough on its own, so we don't have to
// flush them out here.  In other words, the OS will automatically call
// displayIfNeeded at the appropriate times, so we don't need to do it
// ourselves.  See bmo bug 459319.
NS_IMETHODIMP nsChildView::Update()
{
  return NS_OK;
}

#pragma mark -

nsresult nsChildView::ConfigureChildren(const nsTArray<Configuration>& aConfigurations)
{
  for (PRUint32 i = 0; i < aConfigurations.Length(); ++i) {
    const Configuration& config = aConfigurations[i];
    nsChildView* child = static_cast<nsChildView*>(config.mChild);
#ifdef DEBUG
    nsWindowType kidType;
    child->GetWindowType(kidType);
#endif
    NS_ASSERTION(kidType == eWindowType_plugin,
                 "Configured widget is not a plugin type");
    NS_ASSERTION(child->GetParent() == this,
                 "Configured widget is not a child of the right widget");

    // nsIWidget::Show() doesn't get called on plugin widgets unless we call
    // it from here.  See bug 592563.
    child->Show(!config.mClipRegion.IsEmpty());

    PRBool repaint = PR_FALSE;
#ifndef NP_NO_QUICKDRAW
    repaint = child->mView &&
      [(ChildView*)child->mView pluginDrawingModel] == NPDrawingModelQuickDraw;
#endif
    child->Resize(
        config.mBounds.x, config.mBounds.y,
        config.mBounds.width, config.mBounds.height,
        repaint);

    // Store the clip region here in case GetPluginClipRect needs it.
    child->StoreWindowClipRegion(config.mClipRegion);
  }
  return NS_OK;
}

// Invokes callback and ProcessEvent methods on Event Listener object
NS_IMETHODIMP nsChildView::DispatchEvent(nsGUIEvent* event, nsEventStatus& aStatus)
{
#ifdef DEBUG
  debug_DumpEvent(stdout, event->widget, event, nsCAutoString("something"), 0);
#endif

  NS_ASSERTION(!(mTextInputHandler && mTextInputHandler->IsIMEComposing() &&
                 NS_IS_KEY_EVENT(event)),
    "Any key events should not be fired during IME composing");

  aStatus = nsEventStatus_eIgnore;

  nsCOMPtr<nsIWidget> kungFuDeathGrip = do_QueryInterface(mParentWidget ? mParentWidget : this);
  if (mParentWidget) {
    nsWindowType type;
    mParentWidget->GetWindowType(type);
    if (type == eWindowType_popup) {
      // use the parent popup's widget if there is no view
      void* clientData = nsnull;
      if (event->widget)
        event->widget->GetClientData(clientData);
      if (!clientData)
        event->widget = mParentWidget;
    }
  }

  PRBool restoreIsDispatchPaint = mIsDispatchPaint;
  mIsDispatchPaint = mIsDispatchPaint || event->eventStructType == NS_PAINT_EVENT;

  if (mEventCallback)
    aStatus = (*mEventCallback)(event);

  mIsDispatchPaint = restoreIsDispatchPaint;

  return NS_OK;
}

PRBool nsChildView::DispatchWindowEvent(nsGUIEvent &event)
{
  nsEventStatus status;
  DispatchEvent(&event, status);
  return ConvertStatus(status);
}

#pragma mark -

PRBool nsChildView::ReportDestroyEvent()
{
  nsGUIEvent event(PR_TRUE, NS_DESTROY, this);
  event.time = PR_IntervalNow();
  return DispatchWindowEvent(event);
}

PRBool nsChildView::ReportMoveEvent()
{
  nsGUIEvent moveEvent(PR_TRUE, NS_MOVE, this);
  moveEvent.refPoint.x = mBounds.x;
  moveEvent.refPoint.y = mBounds.y;
  moveEvent.time       = PR_IntervalNow();
  return DispatchWindowEvent(moveEvent);
}

PRBool nsChildView::ReportSizeEvent()
{
  nsSizeEvent sizeEvent(PR_TRUE, NS_SIZE, this);
  sizeEvent.time        = PR_IntervalNow();
  sizeEvent.windowSize  = &mBounds;
  sizeEvent.mWinWidth   = mBounds.width;
  sizeEvent.mWinHeight  = mBounds.height;
  return DispatchWindowEvent(sizeEvent);
}

#pragma mark -

//    Return the offset between this child view and the screen.
//    @return       -- widget origin in screen coordinates
nsIntPoint nsChildView::WidgetToScreenOffset()
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN;

  NSPoint temp;
  temp.x = 0;
  temp.y = 0;
  
  // 1. First translate this point into window coords. The returned point is always in
  //    bottom-left coordinates.
  temp = [mView convertPoint:temp toView:nil];  
  
  // 2. We turn the window-coord rect's origin into screen (still bottom-left) coords.
  temp = [[mView window] convertBaseToScreen:temp];
  
  // 3. Since we're dealing in bottom-left coords, we need to make it top-left coords
  //    before we pass it back to Gecko.
  FlipCocoaScreenCoordinate(temp);
  
  return nsIntPoint(NSToIntRound(temp.x), NSToIntRound(temp.y));

  NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(nsIntPoint(0,0));
}

NS_IMETHODIMP nsChildView::CaptureRollupEvents(nsIRollupListener * aListener, 
                                               nsIMenuRollup * aMenuRollup,
                                               PRBool aDoCapture, 
                                               PRBool aConsumeRollupEvent)
{
  // this never gets called, only top-level windows can be rollup widgets
  return NS_OK;
}

NS_IMETHODIMP nsChildView::SetTitle(const nsAString& title)
{
  // child views don't have titles
  return NS_OK;
}

NS_IMETHODIMP nsChildView::GetAttention(PRInt32 aCycleCount)
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

  [NSApp requestUserAttention:NSInformationalRequest];
  return NS_OK;

  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}

/* static */
PRBool nsChildView::DoHasPendingInputEvent()
{
  return sLastInputEventCount != GetCurrentInputEventCount(); 
}

/* static */
PRUint32 nsChildView::GetCurrentInputEventCount()
{
  // Can't use kCGAnyInputEventType because that updates too rarely for us (and
  // always in increments of 30+!) and because apparently it's sort of broken
  // on Tiger.  So just go ahead and query the counters we care about.
  static const CGEventType eventTypes[] = {
    kCGEventLeftMouseDown,
    kCGEventLeftMouseUp,
    kCGEventRightMouseDown,
    kCGEventRightMouseUp,
    kCGEventMouseMoved,
    kCGEventLeftMouseDragged,
    kCGEventRightMouseDragged,
    kCGEventKeyDown,
    kCGEventKeyUp,
    kCGEventScrollWheel,
    kCGEventTabletPointer,
    kCGEventOtherMouseDown,
    kCGEventOtherMouseUp,
    kCGEventOtherMouseDragged
  };

  PRUint32 eventCount = 0;
  for (PRUint32 i = 0; i < NS_ARRAY_LENGTH(eventTypes); ++i) {
    eventCount +=
      CGEventSourceCounterForEventType(kCGEventSourceStateCombinedSessionState,
                                       eventTypes[i]);
  }
  return eventCount;
}

/* static */
void nsChildView::UpdateCurrentInputEventCount()
{
  sLastInputEventCount = GetCurrentInputEventCount();
}

PRBool nsChildView::HasPendingInputEvent()
{
  return DoHasPendingInputEvent();
}

#pragma mark -

// Force Input Method Editor to commit the uncommitted input
// Note that this and other IME methods don't necessarily
// get called on the same ChildView that input is going through.
NS_IMETHODIMP nsChildView::ResetInputState()
{
  NS_ENSURE_TRUE(mTextInputHandler, NS_ERROR_NOT_AVAILABLE);
  mTextInputHandler->CommitIMEComposition();
  return NS_OK;
}

// 'open' means that it can take non-ASCII chars
NS_IMETHODIMP nsChildView::SetIMEOpenState(PRBool aState)
{
  NS_ENSURE_TRUE(mTextInputHandler, NS_ERROR_NOT_AVAILABLE);
  mTextInputHandler->SetIMEOpenState(aState);
  return NS_OK;
}

// 'open' means that it can take non-ASCII chars
NS_IMETHODIMP nsChildView::GetIMEOpenState(PRBool* aState)
{
  NS_ENSURE_TRUE(mTextInputHandler, NS_ERROR_NOT_AVAILABLE);
  *aState = mTextInputHandler->IsIMEOpened();
  return NS_OK;
}

NS_IMETHODIMP nsChildView::SetInputMode(const IMEContext& aContext)
{
  NS_ENSURE_TRUE(mTextInputHandler, NS_ERROR_NOT_AVAILABLE);
  mIMEContext = aContext;
  switch (aContext.mStatus) {
    case nsIWidget::IME_STATUS_ENABLED:
    case nsIWidget::IME_STATUS_PLUGIN:
      mTextInputHandler->SetASCIICapableOnly(PR_FALSE);
      mTextInputHandler->EnableIME(PR_TRUE);
      break;
    case nsIWidget::IME_STATUS_DISABLED:
      mTextInputHandler->SetASCIICapableOnly(PR_FALSE);
      mTextInputHandler->EnableIME(PR_FALSE);
      break;
    case nsIWidget::IME_STATUS_PASSWORD:
      mTextInputHandler->SetASCIICapableOnly(PR_TRUE);
      mTextInputHandler->EnableIME(PR_FALSE);
      break;
    default:
      NS_ERROR("not implemented!");
  }
  return NS_OK;
}

NS_IMETHODIMP nsChildView::GetInputMode(IMEContext& aContext)
{
  aContext = mIMEContext;
  return NS_OK;
}

// Destruct and don't commit the IME composition string.
NS_IMETHODIMP nsChildView::CancelIMEComposition()
{
  NS_ENSURE_TRUE(mTextInputHandler, NS_ERROR_NOT_AVAILABLE);
  mTextInputHandler->CancelIMEComposition();
  return NS_OK;
}

NS_IMETHODIMP nsChildView::GetToggledKeyState(PRUint32 aKeyCode,
                                              PRBool* aLEDState)
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

  NS_ENSURE_ARG_POINTER(aLEDState);
  PRUint32 key;
  switch (aKeyCode) {
    case NS_VK_CAPS_LOCK:
      key = alphaLock;
      break;
    case NS_VK_NUM_LOCK:
      key = kEventKeyModifierNumLockMask;
      break;
    // Mac doesn't support SCROLL_LOCK state.
    default:
      return NS_ERROR_NOT_IMPLEMENTED;
  }
  PRUint32 modifierFlags = ::GetCurrentKeyModifiers();
  *aLEDState = (modifierFlags & key) != 0;
  return NS_OK;

  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}

NS_IMETHODIMP nsChildView::OnIMEFocusChange(PRBool aFocus)
{
  NS_ENSURE_TRUE(mTextInputHandler, NS_ERROR_NOT_AVAILABLE);
  mTextInputHandler->OnFocusChangeInGecko(aFocus);
  // XXX Return NS_ERROR_NOT_IMPLEMENTED, see bug 496360.
  return NS_ERROR_NOT_IMPLEMENTED;
}

NSView<mozView>* nsChildView::GetEditorView()
{
  NSView<mozView>* editorView = mView;
  // We need to get editor's view. E.g., when the focus is in the bookmark
  // dialog, the view is <panel> element of the dialog.  At this time, the key
  // events are processed the parent window's view that has native focus.
  nsQueryContentEvent textContent(PR_TRUE, NS_QUERY_TEXT_CONTENT, this);
  textContent.InitForQueryTextContent(0, 0);
  DispatchWindowEvent(textContent);
  if (textContent.mSucceeded && textContent.mReply.mFocusedWidget) {
    NSView<mozView>* view = static_cast<NSView<mozView>*>(
      textContent.mReply.mFocusedWidget->GetNativeData(NS_NATIVE_WIDGET));
    if (view)
      editorView = view;
  }
  return editorView;
}

#pragma mark -

gfxASurface*
nsChildView::GetThebesSurface()
{
  if (!mTempThebesSurface) {
    mTempThebesSurface = new gfxQuartzSurface(gfxSize(1, 1), gfxASurface::ImageFormatARGB32);
  }

  return mTempThebesSurface;
}

static void
DrawResizer(CGContextRef aCtx)
{
  CGContextSetShouldAntialias(aCtx, false);
  CGPoint points[6];
  points[0] = CGPointMake(13.0f, 4.0f);
  points[1] = CGPointMake(3.0f, 14.0f);
  points[2] = CGPointMake(13.0f, 8.0f);
  points[3] = CGPointMake(7.0f, 14.0f);
  points[4] = CGPointMake(13.0f, 12.0f);
  points[5] = CGPointMake(11.0f, 14.0f);
  CGContextSetRGBStrokeColor(aCtx, 0.00f, 0.00f, 0.00f, 0.15f);
  CGContextStrokeLineSegments(aCtx, points, 6);

  points[0] = CGPointMake(13.0f, 5.0f);
  points[1] = CGPointMake(4.0f, 14.0f);
  points[2] = CGPointMake(13.0f, 9.0f);
  points[3] = CGPointMake(8.0f, 14.0f);
  points[4] = CGPointMake(13.0f, 13.0f);
  points[5] = CGPointMake(12.0f, 14.0f);
  CGContextSetRGBStrokeColor(aCtx, 0.13f, 0.13f, 0.13f, 0.54f);
  CGContextStrokeLineSegments(aCtx, points, 6);

  points[0] = CGPointMake(13.0f, 6.0f);
  points[1] = CGPointMake(5.0f, 14.0f);
  points[2] = CGPointMake(13.0f, 10.0f);
  points[3] = CGPointMake(9.0f, 14.0f);
  points[5] = CGPointMake(13.0f, 13.9f);
  points[4] = CGPointMake(13.0f, 14.0f);
  CGContextSetRGBStrokeColor(aCtx, 0.84f, 0.84f, 0.84f, 0.55f);
  CGContextStrokeLineSegments(aCtx, points, 6);
}

void
nsChildView::DrawOver(LayerManager* aManager, nsIntRect aRect)
{
  if (!ShowsResizeIndicator(nsnull)) {
    return;
  }

  nsRefPtr<LayerManagerOGL> manager(static_cast<LayerManagerOGL*>(aManager));
  if (!manager) {
    return;
  }

  if (!mResizerImage) {
    mResizerImage = manager->gl()->CreateTextureImage(nsIntSize(15, 15),
                                                      gfxASurface::CONTENT_COLOR_ALPHA,
                                                      LOCAL_GL_CLAMP_TO_EDGE,
                                                      /* aUseNearestFilter = */ PR_TRUE);

    // Creation of texture images can fail.
    if (!mResizerImage)
      return;

    nsIntRegion update(nsIntRect(0, 0, 15, 15));
    gfxASurface *asurf = mResizerImage->BeginUpdate(update);
    if (!asurf) {
      mResizerImage = nsnull;
      return;
    }

    NS_ABORT_IF_FALSE(asurf->GetType() == gfxASurface::SurfaceTypeQuartz,
                  "BeginUpdate must return a Quartz surface!");

    nsRefPtr<gfxQuartzSurface> image = static_cast<gfxQuartzSurface*>(asurf);
    DrawResizer(image->GetCGContext());

    mResizerImage->EndUpdate();
  }

  NS_ABORT_IF_FALSE(mResizerImage, "Must have a texture allocated by now!");

  float bottomX = aRect.x + aRect.width;
  float bottomY = aRect.y + aRect.height;

  TextureImage::ScopedBindTexture texBind(mResizerImage, LOCAL_GL_TEXTURE0);

  ColorTextureLayerProgram *program =
    manager->GetColorTextureLayerProgram(mResizerImage->GetShaderProgramType());
  program->Activate();
  program->SetLayerQuadRect(nsIntRect(bottomX - 15,
                                      bottomY - 15,
                                      15,
                                      15));
  program->SetLayerTransform(gfx3DMatrix());
  program->SetLayerOpacity(1.0);
  program->SetRenderOffset(nsIntPoint(0,0));
  program->SetTextureUnit(0);

  manager->BindAndDrawQuad(program);
}

void
nsChildView::UpdateThemeGeometries(const nsTArray<ThemeGeometry>& aThemeGeometries)
{
  NSWindow* win = [mView window];
  if (!win || ![win isKindOfClass:[ToolbarWindow class]])
    return;

  float unifiedToolbarHeight = 0;
  nsIntRect topPixelStrip(0, 0, [win frame].size.width, 1);

  for (PRUint32 i = 0; i < aThemeGeometries.Length(); ++i) {
    const ThemeGeometry& g = aThemeGeometries[i];
    if ((g.mWidgetType == NS_THEME_MOZ_MAC_UNIFIED_TOOLBAR ||
         g.mWidgetType == NS_THEME_TOOLBAR) &&
        g.mRect.Contains(topPixelStrip)) {
      unifiedToolbarHeight = g.mRect.YMost();
    }
  }
  [(ToolbarWindow*)win setUnifiedToolbarHeight:unifiedToolbarHeight];
}

NS_IMETHODIMP
nsChildView::BeginSecureKeyboardInput()
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

  nsresult rv = nsBaseWidget::BeginSecureKeyboardInput();
  if (NS_SUCCEEDED(rv)) {
    ::EnableSecureEventInput();
  }
  return rv;

  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}

NS_IMETHODIMP
nsChildView::EndSecureKeyboardInput()
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

  nsresult rv = nsBaseWidget::EndSecureKeyboardInput();
  if (NS_SUCCEEDED(rv)) {
    ::DisableSecureEventInput();
  }
  return rv;

  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}

#ifdef ACCESSIBILITY
already_AddRefed<nsAccessible>
nsChildView::GetDocumentAccessible()
{
  nsAccessible *docAccessible = nsnull;
  if (mAccessible) {
    CallQueryReferent(mAccessible.get(), &docAccessible);
    return docAccessible;
  }

  // need to fetch the accessible anew, because it has gone away.
  nsEventStatus status;
  nsAccessibleEvent event(PR_TRUE, NS_GETACCESSIBLE, this);
  DispatchEvent(&event, status);

  // cache the accessible in our weak ptr
  mAccessible =
    do_GetWeakReference(static_cast<nsIAccessible*>(event.mAccessible));

  NS_IF_ADDREF(event.mAccessible);
  return event.mAccessible;
}
#endif

#pragma mark -

@implementation ChildView

// globalDragPboard is non-null during native drag sessions that did not originate
// in our native NSView (it is set in |draggingEntered:|). It is unset when the
// drag session ends for this view, either with the mouse exiting or when a drop
// occurs in this view.
NSPasteboard* globalDragPboard = nil;

// gLastDragView and gLastDragMouseDownEvent are used to communicate information
// to the drag service during drag invocation (starting a drag in from the view).
// gLastDragView is only non-null while mouseDragged is on the call stack.
NSView* gLastDragView = nil;
NSEvent* gLastDragMouseDownEvent = nil;

+ (void)initialize
{
  static BOOL initialized = NO;

  if (!initialized) {
    // Inform the OS about the types of services (from the "Services" menu)
    // that we can handle.

    NSArray *sendTypes = [[NSArray alloc] initWithObjects:NSStringPboardType,NSHTMLPboardType,nil];
    NSArray *returnTypes = [[NSArray alloc] initWithObjects:NSStringPboardType,NSHTMLPboardType,nil];
    
    [NSApp registerServicesMenuSendTypes:sendTypes returnTypes:returnTypes];

    [sendTypes release];
    [returnTypes release];

    initialized = YES;
  }
}

// initWithFrame:geckoChild:
- (id)initWithFrame:(NSRect)inFrame geckoChild:(nsChildView*)inChild
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;

  if ((self = [super initWithFrame:inFrame])) {
    mGeckoChild = inChild;
    mIsPluginView = NO;
#ifndef NP_NO_CARBON
    mPluginEventModel = NPEventModelCarbon;
#else
    mPluginEventModel = NPEventModelCocoa;
#endif
#ifndef NP_NO_QUICKDRAW
    mPluginDrawingModel = NPDrawingModelQuickDraw;
#else
    mPluginDrawingModel = NPDrawingModelCoreGraphics;
#endif
    mPendingDisplay = NO;
    mBlockedLastMouseDown = NO;

    mLastMouseDownEvent = nil;
    mClickThroughMouseDownEvent = nil;
    mDragService = nsnull;

    mGestureState = eGestureState_None;
    mCumulativeMagnification = 0.0;
    mCumulativeRotation = 0.0;

    // We can't call forceRefreshOpenGL here because, in order to work around
    // the bug, it seems we need to have a draw already happening. Therefore,
    // we call it in drawRect:inContext:, when we know that a draw is in
    // progress.
    mDidForceRefreshOpenGL = NO;

    [self setFocusRingType:NSFocusRingTypeNone];

#ifdef __LP64__
    mSwipeAnimationCancelled = nil;
#endif
  }
  
  // register for things we'll take from other applications
  PR_LOG(sCocoaLog, PR_LOG_ALWAYS, ("ChildView initWithFrame: registering drag types\n"));
  [self registerForDraggedTypes:[NSArray arrayWithObjects:NSFilenamesPboardType,
                                                          NSStringPboardType,
                                                          NSHTMLPboardType,
                                                          NSURLPboardType,
                                                          NSFilesPromisePboardType,
                                                          kWildcardPboardType,
                                                          kCorePboardType_url,
                                                          kCorePboardType_urld,
                                                          kCorePboardType_urln,
                                                          nil]];
  [[NSNotificationCenter defaultCenter] addObserver:self
                                           selector:@selector(windowBecameMain:)
                                               name:NSWindowDidBecomeMainNotification
                                             object:nil];
  [[NSNotificationCenter defaultCenter] addObserver:self
                                           selector:@selector(windowResignedMain:)
                                               name:NSWindowDidResignMainNotification
                                             object:nil];
  [[NSNotificationCenter defaultCenter] addObserver:self
                                           selector:@selector(systemMetricsChanged)
                                               name:NSControlTintDidChangeNotification
                                             object:nil];
  [[NSNotificationCenter defaultCenter] addObserver:self
                                           selector:@selector(systemMetricsChanged)
                                               name:NSSystemColorsDidChangeNotification
                                             object:nil];
  [[NSDistributedNotificationCenter defaultCenter] addObserver:self
                                                      selector:@selector(systemMetricsChanged)
                                                          name:@"AppleAquaScrollBarVariantChanged"
                                                        object:nil
                                            suspensionBehavior:NSNotificationSuspensionBehaviorDeliverImmediately]; 
  [[NSNotificationCenter defaultCenter] addObserver:self
                                           selector:@selector(_surfaceNeedsUpdate:)
                                               name:NSViewGlobalFrameDidChangeNotification
                                             object:self];

  return self;

  NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}

- (void)installTextInputHandler:(TextInputHandler*)aHandler
{
  mTextInputHandler = aHandler;
}

- (void)uninstallTextInputHandler
{
  mTextInputHandler = nsnull;
}

// Work around bug 603134.
// OS X has a bug that causes new OpenGL windows to only paint once or twice,
// then stop painting altogether. By clearing the drawable from the GL context,
// and then resetting the view to ourselves, we convince OS X to start updating
// again.
// This can cause a flash in new windows - bug 631339 - but it's very hard to
// fix that while maintaining this workaround.
- (void)forceRefreshOpenGL
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  [mGLContext clearDrawable];
  [mGLContext setView:self];

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

- (void)dealloc
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  [mGLContext release];
  [mPendingDirtyRects release];
  [mLastMouseDownEvent release];
  [mClickThroughMouseDownEvent release];
  ChildViewMouseTracker::OnDestroyView(self);

  [[NSNotificationCenter defaultCenter] removeObserver:self];
  [[NSDistributedNotificationCenter defaultCenter] removeObserver:self];

  [super dealloc];    

#ifndef NP_NO_QUICKDRAW
  // This sets the current port to _savePort.
  // todo: Only do if a Quickdraw plugin is present in the hierarchy!
  // Check if ::SetPort() is available -- it probably won't be on
  // OS X 10.8 and up.
  if (::SetPort) {
    ::SetPort(NULL);
  }
#endif

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

- (void)updatePluginTopLevelWindowStatus:(BOOL)hasMain
{
  if (!mGeckoChild)
    return;

  nsPluginEvent pluginEvent(PR_TRUE, NS_PLUGIN_FOCUS_EVENT, mGeckoChild);
  NPCocoaEvent cocoaEvent;
  nsCocoaUtils::InitNPCocoaEvent(&cocoaEvent);
  cocoaEvent.type = NPCocoaEventWindowFocusChanged;
  cocoaEvent.data.focus.hasFocus = hasMain;
  nsCocoaUtils::InitPluginEvent(pluginEvent, cocoaEvent);
  mGeckoChild->DispatchWindowEvent(pluginEvent);
}

- (void)windowBecameMain:(NSNotification*)inNotification
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  if (mIsPluginView && mPluginEventModel == NPEventModelCocoa) {
    if ((NSWindow*)[inNotification object] == [self window]) {
      [self updatePluginTopLevelWindowStatus:YES];
    }
  }

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

- (void)windowResignedMain:(NSNotification*)inNotification
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  if (mIsPluginView && mPluginEventModel == NPEventModelCocoa) {
    if ((NSWindow*)[inNotification object] == [self window]) {
      [self updatePluginTopLevelWindowStatus:NO];
    }
  }

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

- (void)widgetDestroyed
{
  if (mTextInputHandler) {
    mTextInputHandler->OnDestroyWidget(mGeckoChild);
    mTextInputHandler = nsnull;
  }
  mGeckoChild = nsnull;

  // Just in case we're destroyed abruptly and missed the draggingExited
  // or performDragOperation message.
  NS_IF_RELEASE(mDragService);
}

// mozView method, return our gecko child view widget. Note this does not AddRef.
- (nsIWidget*) widget
{
  return static_cast<nsIWidget*>(mGeckoChild);
}

- (void)systemMetricsChanged
{
  if (!mGeckoChild)
    return;

  nsGUIEvent guiEvent(PR_TRUE, NS_THEMECHANGED, mGeckoChild);
  mGeckoChild->DispatchWindowEvent(guiEvent);
}

- (void)setNeedsPendingDisplay
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  mPendingFullDisplay = YES;
  if (!mPendingDisplay) {
    [self performSelector:@selector(processPendingRedraws) withObject:nil afterDelay:0];
    mPendingDisplay = YES;
  }

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

- (void)setNeedsPendingDisplayInRect:(NSRect)invalidRect
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  if (!mPendingDirtyRects)
    mPendingDirtyRects = [[NSMutableArray alloc] initWithCapacity:1];
  [mPendingDirtyRects addObject:[NSValue valueWithRect:invalidRect]];
  if (!mPendingDisplay) {
    [self performSelector:@selector(processPendingRedraws) withObject:nil afterDelay:0];
    mPendingDisplay = YES;
  }

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

// Clears the queue of any pending invalides
- (void)processPendingRedraws
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  if (mPendingFullDisplay) {
    [self setNeedsDisplay:YES];
  }
  else if (mPendingDirtyRects) {
    unsigned int count = [mPendingDirtyRects count];
    for (unsigned int i = 0; i < count; ++i) {
      [self setNeedsDisplayInRect:[[mPendingDirtyRects objectAtIndex:i] rectValue]];
    }
  }
  mPendingFullDisplay = NO;
  mPendingDisplay = NO;
  [mPendingDirtyRects release];
  mPendingDirtyRects = nil;

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

- (void)setNeedsDisplayInRect:(NSRect)aRect
{
  [super setNeedsDisplayInRect:aRect];

  if ([[self window] isKindOfClass:[ToolbarWindow class]]) {
    ToolbarWindow* window = (ToolbarWindow*)[self window];
    if ([window drawsContentsIntoWindowFrame]) {
      // Tell it to mark the rect in the titlebar as dirty.
      NSView* borderView = [[window contentView] superview];
      [window setTitlebarNeedsDisplayInRect:[self convertRect:aRect toView:borderView]];
    }
  }
}

- (NSString*)description
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;

  return [NSString stringWithFormat:@"ChildView %p, gecko child %p, frame %@", self, mGeckoChild, NSStringFromRect([self frame])];

  NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}

// Make the origin of this view the topLeft corner (gecko origin) rather
// than the bottomLeft corner (standard cocoa origin).
- (BOOL)isFlipped
{
  return YES;
}

- (BOOL)isOpaque
{
  return [[self window] isOpaque] && !mIsPluginView;
}

-(void)setIsPluginView:(BOOL)aIsPlugin
{
  mIsPluginView = aIsPlugin;
}

-(BOOL)isPluginView
{
  return mIsPluginView;
}

// Are we processing an NSLeftMouseDown event that will fail to click through?
// If so, we shouldn't focus or unfocus a plugin.
- (BOOL)isInFailingLeftClickThrough
{
  if (!mGeckoChild)
    return NO;

  if (!mClickThroughMouseDownEvent ||
      [mClickThroughMouseDownEvent type] != NSLeftMouseDown)
    return NO;

  BOOL retval =
    !ChildViewMouseTracker::WindowAcceptsEvent([self window],
                                               mClickThroughMouseDownEvent,
                                               self, PR_TRUE);

  // If we return YES here, this will result in us not being focused,
  // which will stop us receiving mClickThroughMouseDownEvent in
  // [ChildView mouseDown:].  So we need to release and null-out
  // mClickThroughMouseDownEvent here.
  if (retval) {
    [mClickThroughMouseDownEvent release];
    mClickThroughMouseDownEvent = nil;
  }

  return retval;
}

- (void)setPluginEventModel:(NPEventModel)eventModel
{
  mPluginEventModel = eventModel;
}

- (void)setPluginDrawingModel:(NPDrawingModel)drawingModel
{
  mPluginDrawingModel = drawingModel;
}

- (NPEventModel)pluginEventModel
{
  return mPluginEventModel;
}

- (NPDrawingModel)pluginDrawingModel
{
  return mPluginDrawingModel;
}

- (void)sendFocusEvent:(PRUint32)eventType
{
  if (!mGeckoChild)
    return;

  nsEventStatus status = nsEventStatus_eIgnore;
  nsGUIEvent focusGuiEvent(PR_TRUE, eventType, mGeckoChild);
  focusGuiEvent.time = PR_IntervalNow();
  mGeckoChild->DispatchEvent(&focusGuiEvent, status);
}

// We accept key and mouse events, so don't keep passing them up the chain. Allow
// this to be a 'focused' widget for event dispatch.
- (BOOL)acceptsFirstResponder
{
  return YES;
}

// Accept mouse down events on background windows
- (BOOL)acceptsFirstMouse:(NSEvent*)aEvent
{
  if (![[self window] isKindOfClass:[PopupWindow class]]) {
    // We rely on this function to tell us that the mousedown was on a
    // background window. Inside mouseDown we can't tell whether we were
    // inactive because at that point we've already been made active.
    // Unfortunately, acceptsFirstMouse is called for PopupWindows even when
    // their parent window is active, so ignore this on them for now.
    mClickThroughMouseDownEvent = [aEvent retain];
  }
  return YES;
}

- (void)viewWillMoveToWindow:(NSWindow *)newWindow
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  if (!newWindow)
    HideChildPluginViews(self);

  [super viewWillMoveToWindow:newWindow];

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

- (void)viewDidMoveToWindow
{
  if (mPluginEventModel == NPEventModelCocoa &&
      [self window] && [self isPluginView] && mGeckoChild) {
    mGeckoChild->UpdatePluginPort();
  }

  [super viewDidMoveToWindow];
}

- (void)scrollRect:(NSRect)aRect by:(NSSize)offset
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  // Update any pending dirty rects to reflect the new scroll position
  if (mPendingDirtyRects) {
    unsigned int count = [mPendingDirtyRects count];
    for (unsigned int i = 0; i < count; ++i) {
      NSRect oldRect = [[mPendingDirtyRects objectAtIndex:i] rectValue];
      NSRect newRect = NSOffsetRect(oldRect, offset.width, offset.height);
      [mPendingDirtyRects replaceObjectAtIndex:i
                                    withObject:[NSValue valueWithRect:newRect]];
    }
  }
  [super scrollRect:aRect by:offset];

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

- (BOOL)mouseDownCanMoveWindow
{
  return NO;
}

- (void)lockFocus
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

#ifndef NP_NO_QUICKDRAW
  // Set the current GrafPort to a "safe" port before calling [NSQuickDrawView lockFocus],
  // so that the NSQuickDrawView stashes a pointer to this known-good port internally.
  // It will set the port back to this port on destruction.
  // Check if ::SetPort() is available -- it probably won't be on OS X 10.8 and up.
  if (::SetPort) {
    ::SetPort(NULL);  // todo: only do if a Quickdraw plugin is present in the hierarchy!
  }
#endif

  [super lockFocus];

  if (mGLContext) {
    if ([mGLContext view] != self) {
      [mGLContext setView:self];
    }

    [mGLContext makeCurrentContext];
  }

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

-(void)update
{
  if (mGLContext) {
    [mGLContext update];
  }
}

- (void) _surfaceNeedsUpdate:(NSNotification*)notification
{
   [self update];
}

// The display system has told us that a portion of our view is dirty. Tell
// gecko to paint it
- (void)drawRect:(NSRect)aRect
{
  CGContextRef cgContext = (CGContextRef)[[NSGraphicsContext currentContext] graphicsPort];
  [self drawRect:aRect inContext:cgContext];

  // If we're a transparent window and our contents have changed, we need
  // to make sure the shadow is updated to the new contents.
  if ([[self window] isKindOfClass:[BaseWindow class]]) {
    [(BaseWindow*)[self window] deferredInvalidateShadow];
  }
}

- (void)drawRect:(NSRect)aRect inTitlebarContext:(CGContextRef)aContext
{
  if (!mGeckoChild)
    return;

  // Title bar drawing only works if we really draw into aContext, which only
  // the basic layer manager will do.
  nsBaseWidget::AutoUseBasicLayerManager setupLayerManager(mGeckoChild);
  [self drawRect:aRect inContext:aContext];
}

- (void)drawRect:(NSRect)aRect inContext:(CGContextRef)aContext
{
  PRBool isVisible;
  if (!mGeckoChild || NS_FAILED(mGeckoChild->IsVisible(isVisible)) ||
      !isVisible)
    return;

#ifndef NP_NO_QUICKDRAW
  if (mIsPluginView && mPluginDrawingModel == NPDrawingModelQuickDraw) {
    mGeckoChild->PaintQD();
    return;
  }
#endif

  // Don't ever draw non-QuickDraw plugin views explicitly; they'll be drawn as
  // part of their parent widget.
  if (mIsPluginView)
    return;

#ifdef DEBUG_UPDATE
  nsIntRect geckoBounds;
  mGeckoChild->GetBounds(geckoBounds);

  fprintf (stderr, "---- Update[%p][%p] [%f %f %f %f] cgc: %p\n  gecko bounds: [%d %d %d %d]\n",
           self, mGeckoChild,
           aRect.origin.x, aRect.origin.y, aRect.size.width, aRect.size.height, aContext,
           geckoBounds.x, geckoBounds.y, geckoBounds.width, geckoBounds.height);

  CGAffineTransform xform = CGContextGetCTM(aContext);
  fprintf (stderr, "  xform in: [%f %f %f %f %f %f]\n", xform.a, xform.b, xform.c, xform.d, xform.tx, xform.ty);
#endif
  // Create the event so we can fill in its region
  nsPaintEvent paintEvent(PR_TRUE, NS_PAINT, mGeckoChild);

  nsIntRect boundingRect =
    nsIntRect(aRect.origin.x, aRect.origin.y, aRect.size.width, aRect.size.height);
  const NSRect *rects;
  NSInteger count, i;
  [[NSView focusView] getRectsBeingDrawn:&rects count:&count];
  if (count < MAX_RECTS_IN_REGION) {
    for (i = 0; i < count; ++i) {
      // Add the rect to the region.
      const NSRect& r = [self convertRect:rects[i] fromView:[NSView focusView]];
      paintEvent.region.Or(paintEvent.region,
        nsIntRect(r.origin.x, r.origin.y, r.size.width, r.size.height));
    }
    paintEvent.region.And(paintEvent.region, boundingRect);
  } else {
    paintEvent.region = boundingRect;
  }

#ifndef NP_NO_QUICKDRAW
  // Subtract quickdraw plugin rectangles from the region
  NSArray* subviews = [self subviews];
  for (int i = 0; i < int([subviews count]); ++i) {
    NSView* view = [subviews objectAtIndex:i];
    if (![view isKindOfClass:[ChildView class]] || [view isHidden])
      continue;
    ChildView* cview = (ChildView*) view;
    if ([cview isPluginView] && [cview pluginDrawingModel] == NPDrawingModelQuickDraw) {
      NSRect frame = [view frame];
      paintEvent.region.Sub(paintEvent.region,
        nsIntRect(frame.origin.x, frame.origin.y, frame.size.width, frame.size.height));
    }
  }
#endif

  if (mGeckoChild->GetLayerManager(nsnull)->GetBackendType() == LayerManager::LAYERS_OPENGL) {
    LayerManagerOGL *manager = static_cast<LayerManagerOGL*>(mGeckoChild->GetLayerManager(nsnull));
    manager->SetClippingRegion(paintEvent.region); 
    if (!mGLContext) {
      mGLContext = (NSOpenGLContext *)manager->gl()->GetNativeData(mozilla::gl::GLContext::NativeGLContext);
      [mGLContext retain];
    }
    mGeckoChild->DispatchWindowEvent(paintEvent);

    // Force OpenGL to refresh the very first time we draw. This works around a
    // Mac OS X bug that stops windows updating on OS X when we use OpenGL.
    if (!mDidForceRefreshOpenGL) {
      [self performSelector:@selector(forceRefreshOpenGL) withObject:nil afterDelay:0];
      mDidForceRefreshOpenGL = YES;
    }

    return;
  }

  // Create Cairo objects.
  NSSize bufferSize = [self bounds].size;
  nsRefPtr<gfxQuartzSurface> targetSurface =
    new gfxQuartzSurface(aContext, gfxSize(bufferSize.width, bufferSize.height));
  targetSurface->SetAllowUseAsSource(PR_FALSE);

  nsRefPtr<gfxContext> targetContext = new gfxContext(targetSurface);

  // Set up the clip region.
  nsIntRegionRectIterator iter(paintEvent.region);
  targetContext->NewPath();
  for (;;) {
    const nsIntRect* r = iter.Next();
    if (!r)
      break;
    targetContext->Rectangle(gfxRect(r->x, r->y, r->width, r->height));
  }
  targetContext->Clip();

  nsAutoRetainCocoaObject kungFuDeathGrip(self);
  PRBool painted;
  {
    nsBaseWidget::AutoLayerManagerSetup
      setupLayerManager(mGeckoChild, targetContext, BasicLayerManager::BUFFER_NONE);
    painted = mGeckoChild->DispatchWindowEvent(paintEvent);
  }

  if (!painted && [self isOpaque]) {
    // Gecko refused to draw, but we've claimed to be opaque, so we have to
    // draw something--fill with white.
    CGContextSetRGBFillColor(aContext, 1, 1, 1, 1);
    CGContextFillRect(aContext, CGRectMake(aRect.origin.x, aRect.origin.y,
                                           aRect.size.width, aRect.size.height));
  }

  // note that the cairo surface *MUST* be destroyed at this point,
  // or bad things will happen (since we can't keep the cgContext around
  // beyond this drawRect message handler)

#ifdef DEBUG_UPDATE
  fprintf (stderr, "---- update done ----\n");

#if 0
  CGContextSetRGBStrokeColor (aContext,
                            ((((unsigned long)self) & 0xff)) / 255.0,
                            ((((unsigned long)self) & 0xff00) >> 8) / 255.0,
                            ((((unsigned long)self) & 0xff0000) >> 16) / 255.0,
                            0.5);
#endif 
  CGContextSetRGBStrokeColor(aContext, 1, 0, 0, 0.8);
  CGContextSetLineWidth(aContext, 4.0);
  CGContextStrokeRect(aContext,
                      CGRectMake(aRect.origin.x, aRect.origin.y, aRect.size.width, aRect.size.height));
#endif
}

- (void)releaseWidgets:(NSArray*)aWidgetArray
{
  if (!aWidgetArray) {
    return;
  }
  NSInteger count = [aWidgetArray count];
  for (NSInteger i = 0; i < count; ++i) {
    NSNumber* pointer = (NSNumber*) [aWidgetArray objectAtIndex:i];
    nsIWidget* widget = (nsIWidget*) [pointer unsignedIntegerValue];
    NS_RELEASE(widget);
  }
}

- (void)viewWillDraw
{
  if (mGeckoChild) {
    // The OS normally *will* draw our NSWindow, no matter what we do here.
    // But Gecko can delete our parent widget(s) (along with mGeckoChild)
    // while processing an NS_WILL_PAINT event, which closes our NSWindow and
    // makes the OS throw an NSInternalInconsistencyException assertion when
    // it tries to draw it.  Sometimes the OS also aborts the browser process.
    // So we need to retain our parent(s) here and not release it/them until
    // the next time through the main thread's run loop.  When we do this we
    // also need to retain and release mGeckoChild, which holds a strong
    // reference to us (otherwise we might have been deleted by the time
    // releaseWidgets: is called on us).  See bug 550392.
    nsIWidget* parent = mGeckoChild->GetParent();
    if (parent) {
      NSMutableArray* widgetArray = [NSMutableArray arrayWithCapacity:3];
      while (parent) {
        NS_ADDREF(parent);
        [widgetArray addObject:[NSNumber numberWithUnsignedInteger:(NSUInteger)parent]];
        parent = parent->GetParent();
      }
      NS_ADDREF(mGeckoChild);
      [widgetArray addObject:[NSNumber numberWithUnsignedInteger:(NSUInteger)mGeckoChild]];
      [self performSelector:@selector(releaseWidgets:)
                 withObject:widgetArray
                 afterDelay:0];
    }
    nsPaintEvent paintEvent(PR_TRUE, NS_WILL_PAINT, mGeckoChild);
    mGeckoChild->DispatchWindowEvent(paintEvent);
  }
  [super viewWillDraw];
}

// Allows us to turn off setting up the clip region
// before each drawRect. We already clip within gecko.
- (BOOL)wantsDefaultClipping
{
  return NO;
}

#if USE_CLICK_HOLD_CONTEXTMENU
//
// -clickHoldCallback:
//
// called from a timer two seconds after a mouse down to see if we should display
// a context menu (click-hold). |anEvent| is the original mouseDown event. If we're
// still in that mouseDown by this time, put up the context menu, otherwise just
// fuhgeddaboutit. |anEvent| has been retained by the OS until after this callback
// fires so we're ok there.
//
// This code currently messes in a bunch of edge cases (bugs 234751, 232964, 232314)
// so removing it until we get it straightened out.
//
- (void)clickHoldCallback:(id)theEvent;
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  if( theEvent == [NSApp currentEvent] ) {
    // we're still in the middle of the same mousedown event here, activate
    // click-hold context menu by triggering the right mouseDown action.
    NSEvent* clickHoldEvent = [NSEvent mouseEventWithType:NSRightMouseDown
                                                  location:[theEvent locationInWindow]
                                             modifierFlags:[theEvent modifierFlags]
                                                 timestamp:[theEvent timestamp]
                                              windowNumber:[theEvent windowNumber]
                                                   context:[theEvent context]
                                               eventNumber:[theEvent eventNumber]
                                                clickCount:[theEvent clickCount]
                                                  pressure:[theEvent pressure]];
    [self rightMouseDown:clickHoldEvent];
  }

  NS_OBJC_END_TRY_ABORT_BLOCK;
}
#endif

// If we've just created a non-native context menu, we need to mark it as
// such and let the OS (and other programs) know when it opens and closes
// (this is how the OS knows to close other programs' context menus when
// ours open).  We send the initial notification here, but others are sent
// in nsCocoaWindow::Show().
- (void)maybeInitContextMenuTracking
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  if (!gRollupWidget)
    return;

#ifdef MOZ_USE_NATIVE_POPUP_WINDOWS
  return;
#endif /* MOZ_USE_NATIVE_POPUP_WINDOWS */

  NSWindow *popupWindow = (NSWindow*)gRollupWidget->GetNativeData(NS_NATIVE_WINDOW);
  if (!popupWindow || ![popupWindow isKindOfClass:[PopupWindow class]])
    return;

  [[NSDistributedNotificationCenter defaultCenter]
    postNotificationName:@"com.apple.HIToolbox.beginMenuTrackingNotification"
                  object:@"org.mozilla.gecko.PopupWindow"];
  [(PopupWindow*)popupWindow setIsContextMenu:YES];

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

// Returns true if the event should no longer be processed, false otherwise.
// This does not return whether or not anything was rolled up.
- (BOOL)maybeRollup:(NSEvent*)theEvent
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN;

  BOOL consumeEvent = NO;

  if (gRollupWidget && gRollupListener) {
    NSWindow* currentPopup = static_cast<NSWindow*>(gRollupWidget->GetNativeData(NS_NATIVE_WINDOW));
    if (!nsCocoaUtils::IsEventOverWindow(theEvent, currentPopup)) {
      // event is not over the rollup window, default is to roll up
      PRBool shouldRollup = PR_TRUE;

      // check to see if scroll events should roll up the popup
      if ([theEvent type] == NSScrollWheel) {
        gRollupListener->ShouldRollupOnMouseWheelEvent(&shouldRollup);
        // always consume scroll events that aren't over the popup
        consumeEvent = YES;
      }

      // if we're dealing with menus, we probably have submenus and
      // we don't want to rollup if the click is in a parent menu of
      // the current submenu
      PRUint32 popupsToRollup = PR_UINT32_MAX;
      if (gMenuRollup) {
        nsAutoTArray<nsIWidget*, 5> widgetChain;
        gMenuRollup->GetSubmenuWidgetChain(&widgetChain);
        PRUint32 sameTypeCount = gMenuRollup->GetSubmenuWidgetChain(&widgetChain);
        for (PRUint32 i = 0; i < widgetChain.Length(); i++) {
          nsIWidget* widget = widgetChain[i];
          NSWindow* currWindow = (NSWindow*)widget->GetNativeData(NS_NATIVE_WINDOW);
          if (nsCocoaUtils::IsEventOverWindow(theEvent, currWindow)) {
            // don't roll up if the mouse event occurred within a menu of the
            // same type. If the mouse event occurred in a menu higher than
            // that, roll up, but pass the number of popups to Rollup so
            // that only those of the same type close up.
            if (i < sameTypeCount) {
              shouldRollup = PR_FALSE;
            }
            else {
              popupsToRollup = sameTypeCount;
            }
            break;
          }
        }
      }

      if (shouldRollup) {
        gRollupListener->Rollup(popupsToRollup, nsnull);
        consumeEvent = (BOOL)gConsumeRollupEvent;
      }
    }
  }

  return consumeEvent;

  NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(NO);
}

/*
 * XXX - The swipeWithEvent, beginGestureWithEvent, magnifyWithEvent,
 * rotateWithEvent, and endGestureWithEvent methods are part of a
 * PRIVATE interface exported by nsResponder and reverse-engineering
 * was necessary to obtain the methods' prototypes. Thus, Apple may
 * change the interface in the future without notice.
 *
 * The prototypes were obtained from the following link:
 * http://cocoadex.com/2008/02/nsevent-modifications-swipe-ro.html
 */

- (void)swipeWithEvent:(NSEvent *)anEvent
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  if (!anEvent || !mGeckoChild)
    return;

  nsAutoRetainCocoaObject kungFuDeathGrip(self);

  float deltaX = [anEvent deltaX];  // left=1.0, right=-1.0
  float deltaY = [anEvent deltaY];  // up=1.0, down=-1.0

  // Setup the "swipe" event.
  nsSimpleGestureEvent geckoEvent(PR_TRUE, NS_SIMPLE_GESTURE_SWIPE, mGeckoChild, 0, 0.0);
  [self convertCocoaMouseEvent:anEvent toGeckoEvent:&geckoEvent];

  // Record the left/right direction.
  if (deltaX > 0.0)
    geckoEvent.direction |= nsIDOMSimpleGestureEvent::DIRECTION_LEFT;
  else if (deltaX < 0.0)
    geckoEvent.direction |= nsIDOMSimpleGestureEvent::DIRECTION_RIGHT;

  // Record the up/down direction.
  if (deltaY > 0.0)
    geckoEvent.direction |= nsIDOMSimpleGestureEvent::DIRECTION_UP;
  else if (deltaY < 0.0)
    geckoEvent.direction |= nsIDOMSimpleGestureEvent::DIRECTION_DOWN;

  // Send the event.
  mGeckoChild->DispatchWindowEvent(geckoEvent);

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

- (void)beginGestureWithEvent:(NSEvent *)anEvent
{
  NS_ASSERTION(mGestureState == eGestureState_None, "mGestureState should be eGestureState_None");

  if (!anEvent)
    return;

  mGestureState = eGestureState_StartGesture;
  mCumulativeMagnification = 0;
  mCumulativeRotation = 0.0;
}

- (void)magnifyWithEvent:(NSEvent *)anEvent
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  if (!anEvent || !mGeckoChild)
    return;

  nsAutoRetainCocoaObject kungFuDeathGrip(self);

  float deltaZ = [anEvent deltaZ];

  PRUint32 msg;
  switch (mGestureState) {
  case eGestureState_StartGesture:
    msg = NS_SIMPLE_GESTURE_MAGNIFY_START;
    mGestureState = eGestureState_MagnifyGesture;
    break;

  case eGestureState_MagnifyGesture:
    msg = NS_SIMPLE_GESTURE_MAGNIFY_UPDATE;
    break;

  case eGestureState_None:
  case eGestureState_RotateGesture:
  default:
    return;
  }

  // Setup the event.
  nsSimpleGestureEvent geckoEvent(PR_TRUE, msg, mGeckoChild, 0, deltaZ);
  [self convertCocoaMouseEvent:anEvent toGeckoEvent:&geckoEvent];

  // Send the event.
  mGeckoChild->DispatchWindowEvent(geckoEvent);

  // Keep track of the cumulative magnification for the final "magnify" event.
  mCumulativeMagnification += deltaZ;
  
  NS_OBJC_END_TRY_ABORT_BLOCK;
}

- (void)rotateWithEvent:(NSEvent *)anEvent
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  if (!anEvent || !mGeckoChild)
    return;

  nsAutoRetainCocoaObject kungFuDeathGrip(self);

  float rotation = [anEvent rotation];

  PRUint32 msg;
  switch (mGestureState) {
  case eGestureState_StartGesture:
    msg = NS_SIMPLE_GESTURE_ROTATE_START;
    mGestureState = eGestureState_RotateGesture;
    break;

  case eGestureState_RotateGesture:
    msg = NS_SIMPLE_GESTURE_ROTATE_UPDATE;
    break;

  case eGestureState_None:
  case eGestureState_MagnifyGesture:
  default:
    return;
  }

  // Setup the event.
  nsSimpleGestureEvent geckoEvent(PR_TRUE, msg, mGeckoChild, 0, 0.0);
  [self convertCocoaMouseEvent:anEvent toGeckoEvent:&geckoEvent];
  geckoEvent.delta = -rotation;
  if (rotation > 0.0) {
    geckoEvent.direction = nsIDOMSimpleGestureEvent::ROTATION_COUNTERCLOCKWISE;
  } else {
    geckoEvent.direction = nsIDOMSimpleGestureEvent::ROTATION_CLOCKWISE;
  }

  // Send the event.
  mGeckoChild->DispatchWindowEvent(geckoEvent);

  // Keep track of the cumulative rotation for the final "rotate" event.
  mCumulativeRotation += rotation;

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

- (void)endGestureWithEvent:(NSEvent *)anEvent
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  if (!anEvent || !mGeckoChild) {
    // Clear the gestures state if we cannot send an event.
    mGestureState = eGestureState_None;
    mCumulativeMagnification = 0.0;
    mCumulativeRotation = 0.0;
    return;
  }

  nsAutoRetainCocoaObject kungFuDeathGrip(self);

  switch (mGestureState) {
  case eGestureState_MagnifyGesture:
    {
      // Setup the "magnify" event.
      nsSimpleGestureEvent geckoEvent(PR_TRUE, NS_SIMPLE_GESTURE_MAGNIFY,
                                      mGeckoChild, 0, mCumulativeMagnification);
      [self convertCocoaMouseEvent:anEvent toGeckoEvent:&geckoEvent];

      // Send the event.
      mGeckoChild->DispatchWindowEvent(geckoEvent);
    }
    break;

  case eGestureState_RotateGesture:
    {
      // Setup the "rotate" event.
      nsSimpleGestureEvent geckoEvent(PR_TRUE, NS_SIMPLE_GESTURE_ROTATE, mGeckoChild, 0, 0.0);
      [self convertCocoaMouseEvent:anEvent toGeckoEvent:&geckoEvent];
      geckoEvent.delta = -mCumulativeRotation;
      if (mCumulativeRotation > 0.0) {
        geckoEvent.direction = nsIDOMSimpleGestureEvent::ROTATION_COUNTERCLOCKWISE;
      } else {
        geckoEvent.direction = nsIDOMSimpleGestureEvent::ROTATION_CLOCKWISE;
      }

      // Send the event.
      mGeckoChild->DispatchWindowEvent(geckoEvent);
    }
    break;

  case eGestureState_None:
  case eGestureState_StartGesture:
  default:
    break;
  }

  // Clear the gestures state.
  mGestureState = eGestureState_None;
  mCumulativeMagnification = 0.0;
  mCumulativeRotation = 0.0;

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

// Support fluid swipe tracking on OS X 10.7 and higher.  We must be careful
// to only invoke this support on a horizontal two-finger gesture that really
// is a swipe (and not a scroll) -- in other words, the app is responsible
// for deciding which is which.  But once the decision is made, the OS tracks
// the swipe until it has finished, and decides whether or not it succeeded.
// A swipe has the same functionality as the Back and Forward buttons.  For
// now swipe animation is unsupported (e.g. no bounces).  This method is
// partly based on Apple sample code available at
// http://developer.apple.com/library/mac/#releasenotes/Cocoa/AppKit.html
// (under Fluid Swipe Tracking API).
#ifdef __LP64__
- (void)maybeTrackScrollEventAsSwipe:(NSEvent *)anEvent
                      scrollOverflow:(PRInt32)overflow
{
  if (!nsToolkit::OnLionOrLater()) {
    return;
  }
  // This method checks whether the AppleEnableSwipeNavigateWithScrolls global
  // preference is set.  If it isn't, fluid swipe tracking is disabled, and a
  // horizontal two-finger gesture is always a scroll (even in Safari).  This
  // preference can't (currently) be set from the Preferences UI -- only using
  // 'defaults write'.
  if (![NSEvent isSwipeTrackingFromScrollEventsEnabled]) {
    return;
  }
  if ([anEvent type] != NSScrollWheel) {
    return;
  }

  // If a swipe is currently being tracked kill it -- it's been interrupted by
  // another gesture or legacy scroll wheel event.
  if (mSwipeAnimationCancelled && (*mSwipeAnimationCancelled == NO)) {
    *mSwipeAnimationCancelled = YES;
    mSwipeAnimationCancelled = nil;
  }

  // Only initiate tracking if the user has tried to scroll past the edge of
  // the current page (as indicated by 'overflow' being non-zero).  Gecko only
  // sets nsMouseScrollEvent.scrollOverflow when it's processing
  // NS_MOUSE_PIXEL_SCROLL events (not NS_MOUSE_SCROLL events).
  // nsMouseScrollEvent.scrollOverflow only indicates left or right overflow
  // for horizontal NS_MOUSE_PIXEL_SCROLL events.
  if (!overflow) {
    return;
  }
  // Only initiate tracking for gestures that have just begun -- otherwise a
  // scroll to one side of the page can have a swipe tacked on to it.
  if ([anEvent phase] != NSEventPhaseBegan) {
    return;
  }
  CGFloat deltaX, deltaY;
  if ([anEvent hasPreciseScrollingDeltas]) {
    deltaX = [anEvent scrollingDeltaX];
    deltaY = [anEvent scrollingDeltaY];
  } else {
    deltaX = [anEvent deltaX];
    deltaY = [anEvent deltaY];
  }
  // Only initiate tracking for events whose horizontal element is at least
  // eight times larger than its vertical element.  This minimizes performance
  // problems with vertical scrolls (by minimizing the possibility that they'll
  // be misinterpreted as horizontal swipes), while still tolerating a small
  // vertical element to a true horizontal swipe.  The number '8' was arrived
  // at by trial and error.
  if ((deltaX == 0) || (fabs(deltaX) <= fabs(deltaY) * 8)) {
    return;
  }

  // geckoEvent must be initialized now (while anEvent is still available),
  // but we also need to access it (and modify it) in the following "block"
  // (the trackingHandler passed to [NSEvent trackSwipeEventWithOptions:...]).
  // Normally we'd give it the '__block' keyword, but this makes the compiler
  // crash :-(  Without the '__block' keyword, it becomes immutable from
  // trackingHandler.  So trackingHandler must make a copy of it and modify
  // that.
  nsSimpleGestureEvent geckoEvent(PR_TRUE, NS_SIMPLE_GESTURE_SWIPE, mGeckoChild, 0, 0.0);
  [self convertCocoaMouseEvent:anEvent toGeckoEvent:&geckoEvent];

  __block BOOL animationCancelled = NO;
  // At this point, anEvent is the first scroll wheel event in a two-finger
  // horizontal gesture that we've decided to treat as a swipe.  When we call
  // [NSEvent trackSwipeEventWithOptions:...], the OS interprets all
  // subsequent scroll wheel events that are part of this gesture as a swipe,
  // and stops sending them to us.  The OS calls the trackingHandler "block"
  // multiple times, asynchronously (sometimes after [NSEvent
  // maybeTrackScrollEventAsSwipe:...] has returned).  The OS determines when
  // the gesture has finished, and whether or not it was "successful" -- this
  // information is passed to trackingHandler.  We must be careful to only
  // call [NSEvent maybeTrackScrollEventAsSwipe:...] on a "real" swipe --
  // otherwise two-finger scrolling performance will suffer significantly.
  [anEvent trackSwipeEventWithOptions:0
             dampenAmountThresholdMin:-1
                                  max:1
                         usingHandler:^(CGFloat gestureAmount, NSEventPhase phase, BOOL isComplete, BOOL *stop) {
      if (animationCancelled) {
        *stop = YES;
        return;
      }
      // gestureAmount is documented to be '-1', '0' or '1' when isComplete
      // is TRUE, but the docs don't say anything about its value at other
      // times.  However, tests show that, when phase == NSEventPhaseEnded,
      // gestureAmount is negative when it will be '-1' at isComplete, and
      // positive when it will be '1'.  And phase is never equal to
      // NSEventPhaseEnded when gestureAmount will be '0' at isComplete.
      // Not waiting until isComplete is TRUE substantially reduces the
      // time it takes to change pages after a swipe, and helps resolve
      // bug 678891.
      if (phase == NSEventPhaseEnded) {
        if (gestureAmount) {
          nsSimpleGestureEvent geckoEventCopy(geckoEvent);
          if (gestureAmount > 0) {
            geckoEventCopy.direction |= nsIDOMSimpleGestureEvent::DIRECTION_LEFT;
          } else {
            geckoEventCopy.direction |= nsIDOMSimpleGestureEvent::DIRECTION_RIGHT;
          }
          mGeckoChild->DispatchWindowEvent(geckoEventCopy);
        }
        mSwipeAnimationCancelled = nil;
      } else if (phase == NSEventPhaseCancelled) {
        mSwipeAnimationCancelled = nil;
      }
    }];

  // We keep a pointer to the __block variable (animationCanceled) so we
  // can cancel our block handler at any time.  Note: We must assign
  // &animationCanceled after our block creation and copy -- its address
  // isn't resolved until then!
  mSwipeAnimationCancelled = &animationCancelled;
}
#endif // #ifdef __LP64__

// Returning NO from this method only disallows ordering on mousedown - in order
// to prevent it for mouseup too, we need to call [NSApp preventWindowOrdering]
// when handling the mousedown event.
- (BOOL)shouldDelayWindowOrderingForEvent:(NSEvent*)aEvent
{
  // Always using system-provided window ordering for normal windows.
  if (![[self window] isKindOfClass:[PopupWindow class]])
    return NO;

  // Don't reorder when we don't have a parent window, like when we're a
  // context menu or a tooltip.
  return ![[self window] parentWindow];
}

- (void)mouseDown:(NSEvent*)theEvent
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  if ([self shouldDelayWindowOrderingForEvent:theEvent]) {
    [NSApp preventWindowOrdering];
  }

  // If we've already seen this event due to direct dispatch from menuForEvent:
  // just bail; if not, remember it.
  if (mLastMouseDownEvent == theEvent) {
    [mLastMouseDownEvent release];
    mLastMouseDownEvent = nil;
    return;
  }
  else {
    [mLastMouseDownEvent release];
    mLastMouseDownEvent = [theEvent retain];
  }

  [gLastDragMouseDownEvent release];
  gLastDragMouseDownEvent = [theEvent retain];

  // We need isClickThrough because at this point the window we're in might
  // already have become main, so the check for isMainWindow in
  // WindowAcceptsEvent isn't enough. It also has to check isClickThrough.
  BOOL isClickThrough = (theEvent == mClickThroughMouseDownEvent);
  [mClickThroughMouseDownEvent release];
  mClickThroughMouseDownEvent = nil;

  nsAutoRetainCocoaObject kungFuDeathGrip(self);

  if ([self maybeRollup:theEvent] ||
      !ChildViewMouseTracker::WindowAcceptsEvent([self window], theEvent, self, isClickThrough)) {
    // Remember blocking because that means we want to block mouseup as well.
    mBlockedLastMouseDown = YES;
    return;
  }

#if USE_CLICK_HOLD_CONTEXTMENU
  // fire off timer to check for click-hold after two seconds. retains |theEvent|
  [self performSelector:@selector(clickHoldCallback:) withObject:theEvent afterDelay:2.0];
#endif

  // in order to send gecko events we'll need a gecko widget
  if (!mGeckoChild)
    return;

  NSUInteger modifierFlags = [theEvent modifierFlags];

  nsMouseEvent geckoEvent(PR_TRUE, NS_MOUSE_BUTTON_DOWN, nsnull, nsMouseEvent::eReal);
  [self convertCocoaMouseEvent:theEvent toGeckoEvent:&geckoEvent];

  NSInteger clickCount = [theEvent clickCount];
  if (mBlockedLastMouseDown && clickCount > 1) {
    // Don't send a double click if the first click of the double click was
    // blocked.
    clickCount--;
  }
  geckoEvent.clickCount = clickCount;

  if (modifierFlags & NSControlKeyMask)
    geckoEvent.button = nsMouseEvent::eRightButton;
  else
    geckoEvent.button = nsMouseEvent::eLeftButton;

  // Create event for use by plugins.
  // This is going to our child view so we don't need to look up the destination
  // event type.
#ifndef NP_NO_CARBON
  EventRecord carbonEvent;
  if (mPluginEventModel == NPEventModelCarbon) {
    carbonEvent.what = mouseDown;
    carbonEvent.message = 0;
    carbonEvent.when = ::TickCount();
    ::GetGlobalMouse(&carbonEvent.where);
    carbonEvent.modifiers = ::GetCurrentKeyModifiers();
    geckoEvent.pluginEvent = &carbonEvent;
  }
#endif
  NPCocoaEvent cocoaEvent;
  if (mPluginEventModel == NPEventModelCocoa) {
    nsCocoaUtils::InitNPCocoaEvent(&cocoaEvent);
    NSPoint point = [self convertPoint:[theEvent locationInWindow] fromView:nil];
    cocoaEvent.type = NPCocoaEventMouseDown;
    cocoaEvent.data.mouse.modifierFlags = modifierFlags;
    cocoaEvent.data.mouse.pluginX = point.x;
    cocoaEvent.data.mouse.pluginY = point.y;
    cocoaEvent.data.mouse.buttonNumber = [theEvent buttonNumber];
    cocoaEvent.data.mouse.clickCount = clickCount;
    cocoaEvent.data.mouse.deltaX = [theEvent deltaX];
    cocoaEvent.data.mouse.deltaY = [theEvent deltaY];
    cocoaEvent.data.mouse.deltaZ = [theEvent deltaZ];
    geckoEvent.pluginEvent = &cocoaEvent;
  }

  mGeckoChild->DispatchWindowEvent(geckoEvent);
  mBlockedLastMouseDown = NO;

  // XXX maybe call markedTextSelectionChanged:client: here?

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

- (void)mouseUp:(NSEvent *)theEvent
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  if (!mGeckoChild || mBlockedLastMouseDown)
    return;

  nsAutoRetainCocoaObject kungFuDeathGrip(self);

#ifndef NP_NO_CARBON
  EventRecord carbonEvent;
#endif // ifndef NP_NO_CARBON
  NPCocoaEvent cocoaEvent;
	
  nsMouseEvent geckoEvent(PR_TRUE, NS_MOUSE_BUTTON_UP, nsnull, nsMouseEvent::eReal);
  [self convertCocoaMouseEvent:theEvent toGeckoEvent:&geckoEvent];
  if ([theEvent modifierFlags] & NSControlKeyMask)
    geckoEvent.button = nsMouseEvent::eRightButton;
  else
    geckoEvent.button = nsMouseEvent::eLeftButton;

  // Create event for use by plugins.
  // This is going to our child view so we don't need to look up the destination
  // event type.
  if (mIsPluginView) {
#ifndef NP_NO_CARBON
    if (mPluginEventModel == NPEventModelCarbon) {
      carbonEvent.what = mouseUp;
      carbonEvent.message = 0;
      carbonEvent.when = ::TickCount();
      ::GetGlobalMouse(&carbonEvent.where);
      carbonEvent.modifiers = ::GetCurrentKeyModifiers();
      geckoEvent.pluginEvent = &carbonEvent;
    }
#endif
    if (mPluginEventModel == NPEventModelCocoa) {
      nsCocoaUtils::InitNPCocoaEvent(&cocoaEvent);
      NSPoint point = [self convertPoint:[theEvent locationInWindow] fromView:nil];
      cocoaEvent.type = NPCocoaEventMouseUp;
      cocoaEvent.data.mouse.modifierFlags = [theEvent modifierFlags];
      cocoaEvent.data.mouse.pluginX = point.x;
      cocoaEvent.data.mouse.pluginY = point.y;
      cocoaEvent.data.mouse.buttonNumber = [theEvent buttonNumber];
      cocoaEvent.data.mouse.clickCount = [theEvent clickCount];
      cocoaEvent.data.mouse.deltaX = [theEvent deltaX];
      cocoaEvent.data.mouse.deltaY = [theEvent deltaY];
      cocoaEvent.data.mouse.deltaZ = [theEvent deltaZ];
      geckoEvent.pluginEvent = &cocoaEvent;
    }
  }

  // This might destroy our widget (and null out mGeckoChild).
  mGeckoChild->DispatchWindowEvent(geckoEvent);

  // If our mouse-up event's location is over some other object (as might
  // happen if it came at the end of a dragging operation), also send our
  // Gecko frame a mouse-exit event.
  if (mGeckoChild && mIsPluginView) {
#ifndef NP_NO_CARBON
    if (mPluginEventModel == NPEventModelCocoa)
#endif
    {
      if (ChildViewMouseTracker::ViewForEvent(theEvent) != self) {
        nsMouseEvent geckoExitEvent(PR_TRUE, NS_MOUSE_EXIT, nsnull, nsMouseEvent::eReal);
        [self convertCocoaMouseEvent:theEvent toGeckoEvent:&geckoExitEvent];

        NPCocoaEvent cocoaEvent;
        nsCocoaUtils::InitNPCocoaEvent(&cocoaEvent);
        NSPoint point = [self convertPoint:[theEvent locationInWindow] fromView:nil];
        cocoaEvent.type = NPCocoaEventMouseExited;
        cocoaEvent.data.mouse.modifierFlags = [theEvent modifierFlags];
        cocoaEvent.data.mouse.pluginX = point.x;
        cocoaEvent.data.mouse.pluginY = point.y;
        cocoaEvent.data.mouse.buttonNumber = [theEvent buttonNumber];
        cocoaEvent.data.mouse.deltaX = [theEvent deltaX];
        cocoaEvent.data.mouse.deltaY = [theEvent deltaY];
        cocoaEvent.data.mouse.deltaZ = [theEvent deltaZ];
        geckoExitEvent.pluginEvent = &cocoaEvent;

        mGeckoChild->DispatchWindowEvent(geckoExitEvent);
      }
    }
  }

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

- (void)sendMouseEnterOrExitEvent:(NSEvent*)aEvent
                            enter:(BOOL)aEnter
                             type:(nsMouseEvent::exitType)aType
{
  if (!mGeckoChild)
    return;

  NSPoint windowEventLocation = nsCocoaUtils::EventLocationForWindow(aEvent, [self window]);
  NSPoint localEventLocation = [self convertPoint:windowEventLocation fromView:nil];

  PRUint32 msg = aEnter ? NS_MOUSE_ENTER : NS_MOUSE_EXIT;
  nsMouseEvent event(PR_TRUE, msg, mGeckoChild, nsMouseEvent::eReal);
  event.refPoint.x = nscoord((PRInt32)localEventLocation.x);
  event.refPoint.y = nscoord((PRInt32)localEventLocation.y);

  // Create event for use by plugins.
  // This is going to our child view so we don't need to look up the destination
  // event type.
#ifndef NP_NO_CARBON  
  EventRecord carbonEvent;
#endif
  NPCocoaEvent cocoaEvent;
  if (mIsPluginView) {
#ifndef NP_NO_CARBON  
    if (mPluginEventModel == NPEventModelCarbon) {
      carbonEvent.what = NPEventType_AdjustCursorEvent;
      carbonEvent.message = 0;
      carbonEvent.when = ::TickCount();
      ::GetGlobalMouse(&carbonEvent.where);
      carbonEvent.modifiers = ::GetCurrentKeyModifiers();
      event.pluginEvent = &carbonEvent;
    }
#endif
    if (mPluginEventModel == NPEventModelCocoa) {
      nsCocoaUtils::InitNPCocoaEvent(&cocoaEvent);
      cocoaEvent.type = ((msg == NS_MOUSE_ENTER) ? NPCocoaEventMouseEntered : NPCocoaEventMouseExited);
      cocoaEvent.data.mouse.modifierFlags = [aEvent modifierFlags];
      cocoaEvent.data.mouse.pluginX = 5;
      cocoaEvent.data.mouse.pluginY = 5;
      cocoaEvent.data.mouse.buttonNumber = [aEvent buttonNumber];
      cocoaEvent.data.mouse.deltaX = [aEvent deltaX];
      cocoaEvent.data.mouse.deltaY = [aEvent deltaY];
      cocoaEvent.data.mouse.deltaZ = [aEvent deltaZ];
      event.pluginEvent = &cocoaEvent;
    }
  }

  event.exit = aType;

  nsEventStatus status; // ignored
  mGeckoChild->DispatchEvent(&event, status);
}

- (void)handleMouseMoved:(NSEvent*)theEvent
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  if (!mGeckoChild)
    return;

  nsMouseEvent geckoEvent(PR_TRUE, NS_MOUSE_MOVE, nsnull, nsMouseEvent::eReal);
  [self convertCocoaMouseEvent:theEvent toGeckoEvent:&geckoEvent];

  // Create event for use by plugins.
  // This is going to our child view so we don't need to look up the destination
  // event type.
#ifndef NP_NO_CARBON
  EventRecord carbonEvent;
#endif
  NPCocoaEvent cocoaEvent;
  if (mIsPluginView) {
#ifndef NP_NO_CARBON
    if (mPluginEventModel == NPEventModelCarbon) {
      carbonEvent.what = NPEventType_AdjustCursorEvent;
      carbonEvent.message = 0;
      carbonEvent.when = ::TickCount();
      ::GetGlobalMouse(&carbonEvent.where);
      carbonEvent.modifiers = ::GetCurrentKeyModifiers();
      geckoEvent.pluginEvent = &carbonEvent;
    }
#endif
    if (mPluginEventModel == NPEventModelCocoa) {
      nsCocoaUtils::InitNPCocoaEvent(&cocoaEvent);
      NSPoint point = [self convertPoint:[theEvent locationInWindow] fromView:nil];
      cocoaEvent.type = NPCocoaEventMouseMoved;
      cocoaEvent.data.mouse.modifierFlags = [theEvent modifierFlags];
      cocoaEvent.data.mouse.pluginX = point.x;
      cocoaEvent.data.mouse.pluginY = point.y;
      cocoaEvent.data.mouse.buttonNumber = [theEvent buttonNumber];
      cocoaEvent.data.mouse.clickCount = [theEvent clickCount];
      cocoaEvent.data.mouse.deltaX = [theEvent deltaX];
      cocoaEvent.data.mouse.deltaY = [theEvent deltaY];
      cocoaEvent.data.mouse.deltaZ = [theEvent deltaZ];
      geckoEvent.pluginEvent = &cocoaEvent;
    }
  }
  mGeckoChild->DispatchWindowEvent(geckoEvent);

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

- (void)mouseDragged:(NSEvent*)theEvent
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  if (!mGeckoChild)
    return;

  gLastDragView = self;

#ifndef NP_NO_CARBON
  EventRecord carbonEvent;
#endif // ifndef NP_NO_CARBON
  NPCocoaEvent cocoaEvent;

  nsMouseEvent geckoEvent(PR_TRUE, NS_MOUSE_MOVE, nsnull, nsMouseEvent::eReal);
  [self convertCocoaMouseEvent:theEvent toGeckoEvent:&geckoEvent];

  // create event for use by plugins
  if (mIsPluginView) {
#ifndef NP_NO_CARBON
    if (mPluginEventModel == NPEventModelCarbon) {
      carbonEvent.what = NPEventType_AdjustCursorEvent;
      carbonEvent.message = 0;
      carbonEvent.when = ::TickCount();
      ::GetGlobalMouse(&carbonEvent.where);
      carbonEvent.modifiers = btnState | ::GetCurrentKeyModifiers();
      geckoEvent.pluginEvent = &carbonEvent;
    }
#endif
    if (mPluginEventModel == NPEventModelCocoa) {
      nsCocoaUtils::InitNPCocoaEvent(&cocoaEvent);
      NSPoint point = [self convertPoint:[theEvent locationInWindow] fromView:nil];
      cocoaEvent.type = NPCocoaEventMouseDragged;
      cocoaEvent.data.mouse.modifierFlags = [theEvent modifierFlags];
      cocoaEvent.data.mouse.pluginX = point.x;
      cocoaEvent.data.mouse.pluginY = point.y;
      cocoaEvent.data.mouse.buttonNumber = [theEvent buttonNumber];
      cocoaEvent.data.mouse.clickCount = [theEvent clickCount];
      cocoaEvent.data.mouse.deltaX = [theEvent deltaX];
      cocoaEvent.data.mouse.deltaY = [theEvent deltaY];
      cocoaEvent.data.mouse.deltaZ = [theEvent deltaZ];
      geckoEvent.pluginEvent = &cocoaEvent;
    }
  }

  mGeckoChild->DispatchWindowEvent(geckoEvent);

  // Note, sending the above event might have destroyed our widget since we didn't retain.
  // Fine so long as we don't access any local variables from here on.
  gLastDragView = nil;

  // XXX maybe call markedTextSelectionChanged:client: here?

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

- (void)rightMouseDown:(NSEvent *)theEvent
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  nsAutoRetainCocoaObject kungFuDeathGrip(self);

  [self maybeRollup:theEvent];
  if (!mGeckoChild)
    return;

  // The right mouse went down, fire off a right mouse down event to gecko
  nsMouseEvent geckoEvent(PR_TRUE, NS_MOUSE_BUTTON_DOWN, nsnull, nsMouseEvent::eReal);
  [self convertCocoaMouseEvent:theEvent toGeckoEvent:&geckoEvent];
  geckoEvent.button = nsMouseEvent::eRightButton;
  geckoEvent.clickCount = [theEvent clickCount];

  // create event for use by plugins
#ifndef NP_NO_CARBON
  EventRecord carbonEvent;
  if (mPluginEventModel == NPEventModelCarbon) {
    carbonEvent.what = mouseDown;
    carbonEvent.message = 0;
    carbonEvent.when = ::TickCount();
    ::GetGlobalMouse(&carbonEvent.where);
    carbonEvent.modifiers = controlKey;  // fake a context menu click
    geckoEvent.pluginEvent = &carbonEvent;    
  }
#endif
  NPCocoaEvent cocoaEvent;
  if (mPluginEventModel == NPEventModelCocoa) {
    nsCocoaUtils::InitNPCocoaEvent(&cocoaEvent);
    NSPoint point = [self convertPoint:[theEvent locationInWindow] fromView:nil];
    cocoaEvent.type = NPCocoaEventMouseDown;
    cocoaEvent.data.mouse.modifierFlags = [theEvent modifierFlags];
    cocoaEvent.data.mouse.pluginX = point.x;
    cocoaEvent.data.mouse.pluginY = point.y;
    cocoaEvent.data.mouse.buttonNumber = [theEvent buttonNumber];
    cocoaEvent.data.mouse.clickCount = [theEvent clickCount];
    cocoaEvent.data.mouse.deltaX = [theEvent deltaX];
    cocoaEvent.data.mouse.deltaY = [theEvent deltaY];
    cocoaEvent.data.mouse.deltaZ = [theEvent deltaZ];
    geckoEvent.pluginEvent = &cocoaEvent;
  }

  mGeckoChild->DispatchWindowEvent(geckoEvent);
  if (!mGeckoChild)
    return;

  // Let the superclass do the context menu stuff.
  [super rightMouseDown:theEvent];

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

- (void)rightMouseUp:(NSEvent *)theEvent
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  if (!mGeckoChild)
    return;

#ifndef NP_NO_CARBON
  EventRecord carbonEvent;
#endif // ifndef NP_NO_CARBON
  NPCocoaEvent cocoaEvent;

  nsMouseEvent geckoEvent(PR_TRUE, NS_MOUSE_BUTTON_UP, nsnull, nsMouseEvent::eReal);
  [self convertCocoaMouseEvent:theEvent toGeckoEvent:&geckoEvent];
  geckoEvent.button = nsMouseEvent::eRightButton;
  geckoEvent.clickCount = [theEvent clickCount];

  // create event for use by plugins
  if (mIsPluginView) {
#ifndef NP_NO_CARBON
    if (mPluginEventModel == NPEventModelCarbon) {
      carbonEvent.what = mouseUp;
      carbonEvent.message = 0;
      carbonEvent.when = ::TickCount();
      ::GetGlobalMouse(&carbonEvent.where);
      carbonEvent.modifiers = controlKey;  // fake a context menu click
      geckoEvent.pluginEvent = &carbonEvent;
    }
#endif
    if (mPluginEventModel == NPEventModelCocoa) {
      nsCocoaUtils::InitNPCocoaEvent(&cocoaEvent);
      NSPoint point = [self convertPoint:[theEvent locationInWindow] fromView:nil];
      cocoaEvent.type = NPCocoaEventMouseUp;
      cocoaEvent.data.mouse.modifierFlags = [theEvent modifierFlags];
      cocoaEvent.data.mouse.pluginX = point.x;
      cocoaEvent.data.mouse.pluginY = point.y;
      cocoaEvent.data.mouse.buttonNumber = [theEvent buttonNumber];
      cocoaEvent.data.mouse.clickCount = [theEvent clickCount];
      cocoaEvent.data.mouse.deltaX = [theEvent deltaX];
      cocoaEvent.data.mouse.deltaY = [theEvent deltaY];
      cocoaEvent.data.mouse.deltaZ = [theEvent deltaZ];
      geckoEvent.pluginEvent = &cocoaEvent;
    }
  }

  nsAutoRetainCocoaObject kungFuDeathGrip(self);
  mGeckoChild->DispatchWindowEvent(geckoEvent);

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

- (void)rightMouseDragged:(NSEvent*)theEvent
{
  if (!mGeckoChild)
    return;

  nsMouseEvent geckoEvent(PR_TRUE, NS_MOUSE_MOVE, nsnull, nsMouseEvent::eReal);
  [self convertCocoaMouseEvent:theEvent toGeckoEvent:&geckoEvent];
  geckoEvent.button = nsMouseEvent::eRightButton;

  // send event into Gecko by going directly to the
  // the widget.
  mGeckoChild->DispatchWindowEvent(geckoEvent);
}

- (void)otherMouseDown:(NSEvent *)theEvent
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  nsAutoRetainCocoaObject kungFuDeathGrip(self);

  if ([self maybeRollup:theEvent] ||
      !ChildViewMouseTracker::WindowAcceptsEvent([self window], theEvent, self))
    return;

  if (!mGeckoChild)
    return;

  nsMouseEvent geckoEvent(PR_TRUE, NS_MOUSE_BUTTON_DOWN, nsnull, nsMouseEvent::eReal);
  [self convertCocoaMouseEvent:theEvent toGeckoEvent:&geckoEvent];
  geckoEvent.button = nsMouseEvent::eMiddleButton;
  geckoEvent.clickCount = [theEvent clickCount];

  mGeckoChild->DispatchWindowEvent(geckoEvent);

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

- (void)otherMouseUp:(NSEvent *)theEvent
{
  if (!mGeckoChild)
    return;

  nsMouseEvent geckoEvent(PR_TRUE, NS_MOUSE_BUTTON_UP, nsnull, nsMouseEvent::eReal);
  [self convertCocoaMouseEvent:theEvent toGeckoEvent:&geckoEvent];
  geckoEvent.button = nsMouseEvent::eMiddleButton;

  mGeckoChild->DispatchWindowEvent(geckoEvent);
}

- (void)otherMouseDragged:(NSEvent*)theEvent
{
  if (!mGeckoChild)
    return;

  nsMouseEvent geckoEvent(PR_TRUE, NS_MOUSE_MOVE, nsnull, nsMouseEvent::eReal);
  [self convertCocoaMouseEvent:theEvent toGeckoEvent:&geckoEvent];
  geckoEvent.button = nsMouseEvent::eMiddleButton;

  // send event into Gecko by going directly to the
  // the widget.
  mGeckoChild->DispatchWindowEvent(geckoEvent);
}

// Handle an NSScrollWheel event for a single axis only.
-(void)scrollWheel:(NSEvent*)theEvent forAxis:(enum nsMouseScrollEvent::nsMouseScrollFlags)inAxis
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  if (!mGeckoChild)
    return;

  float scrollDelta = 0;
  float scrollDeltaPixels = 0;
  PRBool checkPixels =
    Preferences::GetBool("mousewheel.enable_pixel_scrolling", PR_TRUE);

  // Calling deviceDeltaX or deviceDeltaY on theEvent will trigger a Cocoa
  // assertion and an Objective-C NSInternalInconsistencyException if the
  // underlying "Carbon" event doesn't contain pixel scrolling information.
  // For these events, carbonEventKind is kEventMouseWheelMoved instead of
  // kEventMouseScroll.
  if (checkPixels) {
    EventRef theCarbonEvent = [theEvent _eventRef];
    UInt32 carbonEventKind = theCarbonEvent ? ::GetEventKind(theCarbonEvent) : 0;
    if (carbonEventKind != kEventMouseScroll)
      checkPixels = PR_FALSE;
  }

  // Some scrolling devices supports pixel scrolling, e.g. a Macbook
  // touchpad or a Mighty Mouse. On those devices, [event deviceDeltaX/Y]
  // contains the amount of pixels to scroll. 
  if (inAxis & nsMouseScrollEvent::kIsVertical) {
    scrollDelta       = -[theEvent deltaY];
    if (checkPixels && (scrollDelta == 0 || scrollDelta != floor(scrollDelta))) {
      scrollDeltaPixels = -[theEvent deviceDeltaY];
    }
  } else if (inAxis & nsMouseScrollEvent::kIsHorizontal) {
    scrollDelta       = -[theEvent deltaX];
    if (checkPixels && (scrollDelta == 0 || scrollDelta != floor(scrollDelta))) {
      scrollDeltaPixels = -[theEvent deviceDeltaX];
    }
  } else {
    return; // caller screwed up
  }

  BOOL hasPixels = (scrollDeltaPixels != 0);

  if (!hasPixels && scrollDelta == 0)
    // No sense in firing off a Gecko event.
     return;

  BOOL isMomentumScroll = nsCocoaUtils::IsMomentumScrollEvent(theEvent);

  if (scrollDelta != 0) {
    // Send the line scroll event.
    nsMouseScrollEvent geckoEvent(PR_TRUE, NS_MOUSE_SCROLL, nsnull);
    [self convertCocoaMouseEvent:theEvent toGeckoEvent:&geckoEvent];
    geckoEvent.scrollFlags |= inAxis;

    if (hasPixels)
      geckoEvent.scrollFlags |= nsMouseScrollEvent::kHasPixels;

    if (isMomentumScroll)
      geckoEvent.scrollFlags |= nsMouseScrollEvent::kIsMomentum;

    // Gecko only understands how to scroll by an integer value. Using floor
    // and ceil is better than truncating the fraction, especially when
    // |delta| < 1.
    if (scrollDelta < 0)
      geckoEvent.delta = (PRInt32)floorf(scrollDelta);
    else
      geckoEvent.delta = (PRInt32)ceilf(scrollDelta);

    NPCocoaEvent cocoaEvent;
    if (mPluginEventModel == NPEventModelCocoa) {
      nsCocoaUtils::InitNPCocoaEvent(&cocoaEvent);
      NSPoint point = [self convertPoint:[theEvent locationInWindow] fromView:nil];
      cocoaEvent.type = NPCocoaEventScrollWheel;
      cocoaEvent.data.mouse.modifierFlags = [theEvent modifierFlags];
      cocoaEvent.data.mouse.pluginX = point.x;
      cocoaEvent.data.mouse.pluginY = point.y;
      cocoaEvent.data.mouse.buttonNumber = [theEvent buttonNumber];
      cocoaEvent.data.mouse.clickCount = 0;
      if (inAxis & nsMouseScrollEvent::kIsHorizontal)
        cocoaEvent.data.mouse.deltaX = [theEvent deltaX];
      else
        cocoaEvent.data.mouse.deltaX = 0.0;
      if (inAxis & nsMouseScrollEvent::kIsVertical)
        cocoaEvent.data.mouse.deltaY = [theEvent deltaY];
      else
        cocoaEvent.data.mouse.deltaY = 0.0;
      cocoaEvent.data.mouse.deltaZ = 0.0;
      geckoEvent.pluginEvent = &cocoaEvent;
    }

    nsAutoRetainCocoaObject kungFuDeathGrip(self);
    mGeckoChild->DispatchWindowEvent(geckoEvent);
    if (!mGeckoChild)
      return;

#ifndef NP_NO_CARBON
    // dispatch scroll wheel carbon event for plugins
    if (mPluginEventModel == NPEventModelCarbon) {
      EventRef theEvent;
      OSStatus err = ::CreateEvent(NULL,
                                   kEventClassMouse,
                                   kEventMouseWheelMoved,
                                   TicksToEventTime(TickCount()),
                                   kEventAttributeUserEvent,
                                   &theEvent);
      if (err == noErr) {
        EventMouseWheelAxis axis;
        if (inAxis & nsMouseScrollEvent::kIsVertical)
          axis = kEventMouseWheelAxisY;
        else if (inAxis & nsMouseScrollEvent::kIsHorizontal)
          axis = kEventMouseWheelAxisX;
        
        SetEventParameter(theEvent,
                          kEventParamMouseWheelAxis,
                          typeMouseWheelAxis,
                          sizeof(EventMouseWheelAxis),
                          &axis);
        
        SInt32 delta = (SInt32)-geckoEvent.delta;
        SetEventParameter(theEvent,
                          kEventParamMouseWheelDelta,
                          typeLongInteger,
                          sizeof(SInt32),
                          &delta);
        
        Point mouseLoc;
        ::GetGlobalMouse(&mouseLoc);
        SetEventParameter(theEvent,
                          kEventParamMouseLocation,
                          typeQDPoint,
                          sizeof(Point),
                          &mouseLoc);
        
        ::SendEventToEventTarget(theEvent, GetWindowEventTarget((WindowRef)[[self window] windowRef]));
        ReleaseEvent(theEvent);
      }
    }
#endif
  }

  if (hasPixels) {
    // Send the pixel scroll event.
    nsMouseScrollEvent geckoEvent(PR_TRUE, NS_MOUSE_PIXEL_SCROLL, nsnull);
    [self convertCocoaMouseEvent:theEvent toGeckoEvent:&geckoEvent];
    geckoEvent.scrollFlags |= inAxis;
    if (isMomentumScroll)
      geckoEvent.scrollFlags |= nsMouseScrollEvent::kIsMomentum;
    geckoEvent.delta = NSToIntRound(scrollDeltaPixels);
    nsAutoRetainCocoaObject kungFuDeathGrip(self);
    mGeckoChild->DispatchWindowEvent(geckoEvent);
#ifdef __LP64__
    // scrollOverflow tells us when the user has tried to scroll past the edge
    // of a page (in those cases it's non-zero).  Gecko only sets it when
    // processing NS_MOUSE_PIXEL_SCROLL events (not MS_MOUSE_SCROLL events).
    // It only means left/right overflow when Gecko is processing a horizontal
    // event.
    if (inAxis & nsMouseScrollEvent::kIsHorizontal) {
      [self maybeTrackScrollEventAsSwipe:theEvent
                          scrollOverflow:geckoEvent.scrollOverflow];
    }
#endif // #ifdef __LP64__
  }

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

-(void)scrollWheel:(NSEvent*)theEvent
{
  nsAutoRetainCocoaObject kungFuDeathGrip(self);

  ChildViewMouseTracker::MouseScrolled(theEvent);

  if ([self maybeRollup:theEvent])
    return;

  // It's possible for a single NSScrollWheel event to carry both useful
  // deltaX and deltaY, for example, when the "wheel" is a trackpad.
  // NSMouseScrollEvent can only carry one axis at a time, so the system
  // event will be split into two Gecko events if necessary.
  [self scrollWheel:theEvent forAxis:nsMouseScrollEvent::kIsVertical];
  [self scrollWheel:theEvent forAxis:nsMouseScrollEvent::kIsHorizontal];
}

-(NSMenu*)menuForEvent:(NSEvent*)theEvent
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;

  if (!mGeckoChild || [self isPluginView])
    return nil;

  nsAutoRetainCocoaObject kungFuDeathGrip(self);

  [self maybeRollup:theEvent];
  if (!mGeckoChild)
    return nil;

  // Cocoa doesn't always dispatch a mouseDown: for a control-click event,
  // depends on what we return from menuForEvent:. Gecko always expects one
  // and expects the mouse down event before the context menu event, so
  // get that event sent first if this is a left mouse click.
  if ([theEvent type] == NSLeftMouseDown) {
    [self mouseDown:theEvent];
    if (!mGeckoChild)
      return nil;
  }

  nsMouseEvent geckoEvent(PR_TRUE, NS_CONTEXTMENU, nsnull, nsMouseEvent::eReal);
  [self convertCocoaMouseEvent:theEvent toGeckoEvent:&geckoEvent];
  geckoEvent.button = nsMouseEvent::eRightButton;
  mGeckoChild->DispatchWindowEvent(geckoEvent);
  if (!mGeckoChild)
    return nil;

  [self maybeInitContextMenuTracking];

  // Go up our view chain to fetch the correct menu to return.
  return [self contextMenu];

  NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}

- (NSMenu*)contextMenu
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;

  NSView* superView = [self superview];
  if ([superView respondsToSelector:@selector(contextMenu)])
    return [(NSView<mozView>*)superView contextMenu];

  return nil;

  NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}

// Basic conversion for cocoa to gecko events, common to all conversions.
// Note that it is OK for inEvent to be nil.
- (void) convertGenericCocoaEvent:(NSEvent*)inEvent toGeckoEvent:(nsInputEvent*)outGeckoEvent
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  NS_ASSERTION(outGeckoEvent, "convertGenericCocoaEvent:toGeckoEvent: requires non-null outGeckoEvent");
  if (!outGeckoEvent)
    return;

  outGeckoEvent->widget = [self widget];
  outGeckoEvent->time = PR_IntervalNow();

  if (inEvent) {
    unsigned int modifiers = [inEvent modifierFlags];
    outGeckoEvent->isShift   = ((modifiers & NSShiftKeyMask) != 0);
    outGeckoEvent->isControl = ((modifiers & NSControlKeyMask) != 0);
    outGeckoEvent->isAlt     = ((modifiers & NSAlternateKeyMask) != 0);
    outGeckoEvent->isMeta    = ((modifiers & NSCommandKeyMask) != 0);
  }

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

- (void) convertCocoaMouseEvent:(NSEvent*)aMouseEvent toGeckoEvent:(nsInputEvent*)outGeckoEvent
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  NS_ASSERTION(outGeckoEvent, "convertCocoaMouseEvent:toGeckoEvent: requires non-null aoutGeckoEvent");
  if (!outGeckoEvent)
    return;

  [self convertGenericCocoaEvent:aMouseEvent toGeckoEvent:outGeckoEvent];

  // convert point to view coordinate system
  NSPoint locationInWindow = nsCocoaUtils::EventLocationForWindow(aMouseEvent, [self window]);
  NSPoint localPoint = [self convertPoint:locationInWindow fromView:nil];
  outGeckoEvent->refPoint.x = static_cast<nscoord>(localPoint.x);
  outGeckoEvent->refPoint.y = static_cast<nscoord>(localPoint.y);

  NS_OBJC_END_TRY_ABORT_BLOCK;
}


#pragma mark -
// NSTextInput implementation

- (void)insertText:(id)insertString
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  NS_ENSURE_TRUE(mGeckoChild, );

  nsAutoRetainCocoaObject kungFuDeathGrip(self);

  NSAttributedString* attrStr;
  if ([insertString isKindOfClass:[NSAttributedString class]]) {
    attrStr = static_cast<NSAttributedString*>(insertString);
  } else {
    attrStr =
      [[[NSAttributedString alloc] initWithString:insertString] autorelease];
  }

  mTextInputHandler->InsertText(attrStr);

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

- (void)insertNewline:(id)sender
{
  [self insertText:@"\n"];
}

- (void) doCommandBySelector:(SEL)aSelector
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  if (!mGeckoChild || !mTextInputHandler) {
    return;
  }

  const char* sel = reinterpret_cast<const char*>(aSelector);
  if (!mTextInputHandler->DoCommandBySelector(sel)) {
    [super doCommandBySelector:aSelector];
  }

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

- (void) setMarkedText:(id)aString selectedRange:(NSRange)selRange
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  NS_ENSURE_TRUE(mTextInputHandler, );

  nsAutoRetainCocoaObject kungFuDeathGrip(self);

  NSAttributedString* attrStr;
  if ([aString isKindOfClass:[NSAttributedString class]]) {
    attrStr = static_cast<NSAttributedString*>(aString);
  } else {
    attrStr = [[[NSAttributedString alloc] initWithString:aString] autorelease];
  }

  mTextInputHandler->SetMarkedText(attrStr, selRange);

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

- (void) unmarkText
{
  NS_ENSURE_TRUE(mTextInputHandler, );
  mTextInputHandler->CommitIMEComposition();
}

- (BOOL) hasMarkedText
{
  NS_ENSURE_TRUE(mTextInputHandler, NO);
  return mTextInputHandler->HasMarkedText();
}

- (NSInteger) conversationIdentifier
{
  NS_ENSURE_TRUE(mTextInputHandler, reinterpret_cast<NSInteger>(self));
  return mTextInputHandler->ConversationIdentifier();
}

- (NSAttributedString *) attributedSubstringFromRange:(NSRange)theRange
{
  NS_ENSURE_TRUE(mTextInputHandler, nil);
  return mTextInputHandler->GetAttributedSubstringFromRange(theRange);
}

- (NSRange) markedRange
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN;

  NS_ENSURE_TRUE(mTextInputHandler, NSMakeRange(NSNotFound, 0));
  return mTextInputHandler->MarkedRange();

  NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(NSMakeRange(0, 0));
}

- (NSRange) selectedRange
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN;

  NS_ENSURE_TRUE(mTextInputHandler, NSMakeRange(NSNotFound, 0));
  return mTextInputHandler->SelectedRange();

  NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(NSMakeRange(0, 0));
}

- (NSRect) firstRectForCharacterRange:(NSRange)theRange
{
  NSRect rect;
  NS_ENSURE_TRUE(mTextInputHandler, rect);
  return mTextInputHandler->FirstRectForCharacterRange(theRange);
}

- (NSUInteger)characterIndexForPoint:(NSPoint)thePoint
{
  NS_ENSURE_TRUE(mTextInputHandler, 0);
  return mTextInputHandler->CharacterIndexForPoint(thePoint);
}

- (NSArray*) validAttributesForMarkedText
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;

  NS_ENSURE_TRUE(mTextInputHandler, [NSArray array]);
  return mTextInputHandler->GetValidAttributesForMarkedText();

  NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}

#pragma mark -

#ifdef NP_NO_CARBON
- (NSTextInputContext *)inputContext
{
  if (mIsPluginView && mPluginEventModel == NPEventModelCocoa)
    return [[ComplexTextInputPanel sharedComplexTextInputPanel] inputContext];
  else
    return [super inputContext];
}
#endif

// This is a private API that Cocoa uses.
// Cocoa will call this after the menu system returns "NO" for "performKeyEquivalent:".
// We want all they key events we can get so just return YES. In particular, this fixes
// ctrl-tab - we don't get a "keyDown:" call for that without this.
- (BOOL)_wantsKeyDownForEvent:(NSEvent*)event
{
  return YES;
}

- (void)keyDown:(NSEvent*)theEvent
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  if (mGeckoChild && mTextInputHandler && mIsPluginView) {
    mTextInputHandler->HandleKeyDownEventForPlugin(theEvent);
    return;
  }

  nsAutoRetainCocoaObject kungFuDeathGrip(self);
  PRBool handled = PR_FALSE;
  if (mGeckoChild && mTextInputHandler) {
    handled = mTextInputHandler->HandleKeyDownEvent(theEvent);
  }

  // We always allow keyboard events to propagate to keyDown: but if they are not
  // handled we give special Application menu items a chance to act.
  if (!handled && sApplicationMenu) {
    [sApplicationMenu performKeyEquivalent:theEvent];
  }

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

- (void)keyUp:(NSEvent*)theEvent
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  NS_ENSURE_TRUE(mGeckoChild, );

  nsAutoRetainCocoaObject kungFuDeathGrip(self);

  if (mIsPluginView) {
    mTextInputHandler->HandleKeyUpEventForPlugin(theEvent);
    return;
  }

  mTextInputHandler->HandleKeyUpEvent(theEvent);

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

- (void)flagsChanged:(NSEvent*)theEvent
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  NS_ENSURE_TRUE(mGeckoChild, );

  nsAutoRetainCocoaObject kungFuDeathGrip(self);
  mTextInputHandler->HandleFlagsChanged(theEvent);

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

- (BOOL) isFirstResponder
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN;

  NSResponder* resp = [[self window] firstResponder];
  return (resp == (NSResponder*)self);

  NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(NO);
}

- (BOOL)isDragInProgress
{
  if (!mDragService)
    return NO;

  nsCOMPtr<nsIDragSession> dragSession;
  mDragService->GetCurrentSession(getter_AddRefs(dragSession));
  return dragSession != nsnull;
}

- (BOOL)inactiveWindowAcceptsMouseEvent:(NSEvent*)aEvent
{
  // If we're being destroyed assume the default -- return YES.
  if (!mGeckoChild)
    return YES;

  nsMouseEvent geckoEvent(PR_TRUE, NS_MOUSE_ACTIVATE, nsnull, nsMouseEvent::eReal);
  [self convertCocoaMouseEvent:aEvent toGeckoEvent:&geckoEvent];
  return !mGeckoChild->DispatchWindowEvent(geckoEvent);
}

// Don't focus a plugin if the user has clicked on a DOM element above it.
// In this case the user has actually clicked on the plugin's ChildView
// (underneath the non-plugin DOM element).  But we shouldn't allow the
// ChildView to be focused.  See bug 627649.
- (BOOL)currentEventShouldFocusPlugin
{
  if (!mGeckoChild)
    return NO;

  NSEvent* currentEvent = [NSApp currentEvent];
  if ([currentEvent type] != NSLeftMouseDown)
    return YES;

  nsAutoRetainCocoaObject kungFuDeathGrip(self);

  NSPoint eventLoc = nsCocoaUtils::ScreenLocationForEvent(currentEvent);
  eventLoc.y = nsCocoaUtils::FlippedScreenY(eventLoc.y);
  nsIntPoint widgetLoc(NSToIntRound(eventLoc.x), NSToIntRound(eventLoc.y));
  widgetLoc -= mGeckoChild->WidgetToScreenOffset();

  nsQueryContentEvent hitTest(PR_TRUE, NS_QUERY_DOM_WIDGET_HITTEST, mGeckoChild);
  hitTest.InitForQueryDOMWidgetHittest(widgetLoc);
  // This might destroy our widget (and null out mGeckoChild).
  mGeckoChild->DispatchWindowEvent(hitTest);
  if (!mGeckoChild)
    return NO;
  if (hitTest.mSucceeded && !hitTest.mReply.mWidgetIsHit)
    return NO;

  return YES;
}

// Don't focus a plugin if we're in a left click-through that will fail (see
// [ChildView isInFailingLeftClickThrough] above).
- (BOOL)shouldFocusPlugin:(BOOL)getFocus
{
  if (!mGeckoChild)
    return NO;

  nsCocoaWindow* windowWidget = mGeckoChild->GetXULWindowWidget();
  if (windowWidget && !windowWidget->ShouldFocusPlugin())
    return NO;

  if (getFocus && ![self currentEventShouldFocusPlugin])
    return NO;

  return YES;
}

// Returns NO if the plugin shouldn't be focused/unfocused.
- (BOOL)updatePluginFocusStatus:(BOOL)getFocus
{
  if (!mGeckoChild)
    return NO;

  if (![self shouldFocusPlugin:getFocus])
    return NO;

  if (mPluginEventModel == NPEventModelCocoa) {
    nsPluginEvent pluginEvent(PR_TRUE, NS_PLUGIN_FOCUS_EVENT, mGeckoChild);
    NPCocoaEvent cocoaEvent;
    nsCocoaUtils::InitNPCocoaEvent(&cocoaEvent);
    cocoaEvent.type = NPCocoaEventFocusChanged;
    cocoaEvent.data.focus.hasFocus = getFocus;
    nsCocoaUtils::InitPluginEvent(pluginEvent, cocoaEvent);
    mGeckoChild->DispatchWindowEvent(pluginEvent);

    if (getFocus)
      [self sendFocusEvent:NS_PLUGIN_FOCUS];
  }

  return YES;
}

// We must always call through to our superclass, even when mGeckoChild is
// nil -- otherwise the keyboard focus can end up in the wrong NSView.
- (BOOL)becomeFirstResponder
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN;

  if (mIsPluginView) {
    if (![self updatePluginFocusStatus:YES])
      return NO;
  }

  return [super becomeFirstResponder];

  NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(YES);
}

// We must always call through to our superclass, even when mGeckoChild is
// nil -- otherwise the keyboard focus can end up in the wrong NSView.
- (BOOL)resignFirstResponder
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN;

  if (mIsPluginView) {
    if (![self updatePluginFocusStatus:NO])
      return NO;
  }

  return [super resignFirstResponder];

  NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(YES);
}

- (void)viewsWindowDidBecomeKey
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  if (!mGeckoChild)
    return;

  nsAutoRetainCocoaObject kungFuDeathGrip(self);

  // check to see if the window implements the mozWindow protocol. This
  // allows embedders to avoid re-entrant calls to -makeKeyAndOrderFront,
  // which can happen because these activate calls propagate out
  // to the embedder via nsIEmbeddingSiteWindow::SetFocus().
  BOOL isMozWindow = [[self window] respondsToSelector:@selector(setSuppressMakeKeyFront:)];
  if (isMozWindow)
    [[self window] setSuppressMakeKeyFront:YES];

  [self sendFocusEvent:NS_ACTIVATE];

  if (isMozWindow)
    [[self window] setSuppressMakeKeyFront:NO];

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

- (void)viewsWindowDidResignKey
{
  if (!mGeckoChild)
    return;

  nsAutoRetainCocoaObject kungFuDeathGrip(self);

  [self sendFocusEvent:NS_DEACTIVATE];
}

// If the call to removeFromSuperview isn't delayed from nsChildView::
// TearDownView(), the NSView hierarchy might get changed during calls to
// [ChildView drawRect:], which leads to "beyond bounds" exceptions in
// NSCFArray.  For more info see bmo bug 373122.  Apple's docs claim that
// removeFromSuperviewWithoutNeedingDisplay "can be safely invoked during
// display" (whatever "display" means).  But it's _not_ true that it can be
// safely invoked during calls to [NSView drawRect:].  We use
// removeFromSuperview here because there's no longer any danger of being
// "invoked during display", and because doing do clears up bmo bug 384343.
- (void)delayedTearDown
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  [self removeFromSuperview];
  [self release];

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

#pragma mark -

// drag'n'drop stuff
#define kDragServiceContractID "@mozilla.org/widget/dragservice;1"

- (NSDragOperation)dragOperationForSession:(nsIDragSession*)aDragSession
{
  PRUint32 dragAction;
  aDragSession->GetDragAction(&dragAction);
  if (nsIDragService::DRAGDROP_ACTION_LINK & dragAction)
    return NSDragOperationLink;
  if (nsIDragService::DRAGDROP_ACTION_COPY & dragAction)
    return NSDragOperationCopy;
  if (nsIDragService::DRAGDROP_ACTION_MOVE & dragAction)
    return NSDragOperationGeneric;
  return NSDragOperationNone;
}

// This is a utility function used by NSView drag event methods
// to send events. It contains all of the logic needed for Gecko
// dragging to work. Returns the appropriate cocoa drag operation code.
- (NSDragOperation)doDragAction:(PRUint32)aMessage sender:(id)aSender
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN;

  if (!mGeckoChild)
    return NSDragOperationNone;

  PR_LOG(sCocoaLog, PR_LOG_ALWAYS, ("ChildView doDragAction: entered\n"));

  if (!mDragService) {
    CallGetService(kDragServiceContractID, &mDragService);
    NS_ASSERTION(mDragService, "Couldn't get a drag service - big problem!");
    if (!mDragService)
      return NSDragOperationNone;
  }

  if (aMessage == NS_DRAGDROP_ENTER)
    mDragService->StartDragSession();

  nsCOMPtr<nsIDragSession> dragSession;
  mDragService->GetCurrentSession(getter_AddRefs(dragSession));
  if (dragSession) {
    if (aMessage == NS_DRAGDROP_OVER) {
      // fire the drag event at the source. Just ignore whether it was
      // cancelled or not as there isn't actually a means to stop the drag
      mDragService->FireDragEventAtSource(NS_DRAGDROP_DRAG);
      dragSession->SetCanDrop(PR_FALSE);
    }
    else if (aMessage == NS_DRAGDROP_DROP) {
      // We make the assumption that the dragOver handlers have correctly set
      // the |canDrop| property of the Drag Session.
      PRBool canDrop = PR_FALSE;
      if (!NS_SUCCEEDED(dragSession->GetCanDrop(&canDrop)) || !canDrop) {
        [self doDragAction:NS_DRAGDROP_EXIT sender:aSender];

        nsCOMPtr<nsIDOMNode> sourceNode;
        dragSession->GetSourceNode(getter_AddRefs(sourceNode));
        if (!sourceNode) {
          mDragService->EndDragSession(PR_FALSE);
        }
        return NSDragOperationNone;
      }
    }
    
    unsigned int modifierFlags = [[NSApp currentEvent] modifierFlags];
    PRUint32 action = nsIDragService::DRAGDROP_ACTION_MOVE;
    // force copy = option, alias = cmd-option, default is move
    if (modifierFlags & NSAlternateKeyMask) {
      if (modifierFlags & NSCommandKeyMask)
        action = nsIDragService::DRAGDROP_ACTION_LINK;
      else
        action = nsIDragService::DRAGDROP_ACTION_COPY;
    }
    dragSession->SetDragAction(action);
  }

  // set up gecko event
  nsDragEvent geckoEvent(PR_TRUE, aMessage, nsnull);
  [self convertGenericCocoaEvent:[NSApp currentEvent] toGeckoEvent:&geckoEvent];

  // Use our own coordinates in the gecko event.
  // Convert event from gecko global coords to gecko view coords.
  NSPoint localPoint = [self convertPoint:[aSender draggingLocation] fromView:nil];
  geckoEvent.refPoint.x = static_cast<nscoord>(localPoint.x);
  geckoEvent.refPoint.y = static_cast<nscoord>(localPoint.y);

  nsAutoRetainCocoaObject kungFuDeathGrip(self);
  mGeckoChild->DispatchWindowEvent(geckoEvent);
  if (!mGeckoChild)
    return NSDragOperationNone;

  if (dragSession) {
    switch (aMessage) {
      case NS_DRAGDROP_ENTER:
      case NS_DRAGDROP_OVER:
        return [self dragOperationForSession:dragSession];
      case NS_DRAGDROP_EXIT:
      case NS_DRAGDROP_DROP: {
        nsCOMPtr<nsIDOMNode> sourceNode;
        dragSession->GetSourceNode(getter_AddRefs(sourceNode));
        if (!sourceNode) {
          // We're leaving a window while doing a drag that was
          // initiated in a different app. End the drag session,
          // since we're done with it for now (until the user
          // drags back into mozilla).
          mDragService->EndDragSession(PR_FALSE);
        }
      }
    }
  }

  return NSDragOperationGeneric;

  NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(NSDragOperationNone);
}

- (NSDragOperation)draggingEntered:(id <NSDraggingInfo>)sender
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN;

  PR_LOG(sCocoaLog, PR_LOG_ALWAYS, ("ChildView draggingEntered: entered\n"));
  
  // there should never be a globalDragPboard when "draggingEntered:" is
  // called, but just in case we'll take care of it here.
  [globalDragPboard release];

  // Set the global drag pasteboard that will be used for this drag session.
  // This will be set back to nil when the drag session ends (mouse exits
  // the view or a drop happens within the view).
  globalDragPboard = [[sender draggingPasteboard] retain];

  return [self doDragAction:NS_DRAGDROP_ENTER sender:sender];

  NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(NSDragOperationNone);
}

- (NSDragOperation)draggingUpdated:(id <NSDraggingInfo>)sender
{
  PR_LOG(sCocoaLog, PR_LOG_ALWAYS, ("ChildView draggingUpdated: entered\n"));

  return [self doDragAction:NS_DRAGDROP_OVER sender:sender];
}

- (void)draggingExited:(id <NSDraggingInfo>)sender
{
  PR_LOG(sCocoaLog, PR_LOG_ALWAYS, ("ChildView draggingExited: entered\n"));

  nsAutoRetainCocoaObject kungFuDeathGrip(self);
  [self doDragAction:NS_DRAGDROP_EXIT sender:sender];
  NS_IF_RELEASE(mDragService);
}

- (BOOL)performDragOperation:(id <NSDraggingInfo>)sender
{
  nsAutoRetainCocoaObject kungFuDeathGrip(self);
  BOOL handled = [self doDragAction:NS_DRAGDROP_DROP sender:sender] != NSDragOperationNone;
  NS_IF_RELEASE(mDragService);
  return handled;
}

// NSDraggingSource
- (void)draggedImage:(NSImage *)anImage movedTo:(NSPoint)aPoint
{
  // Get the drag service if it isn't already cached. The drag service
  // isn't cached when dragging over a different application.
  nsCOMPtr<nsIDragService> dragService = mDragService;
  if (!dragService) {
    dragService = do_GetService(kDragServiceContractID);
  }

  if (dragService) {
    NSPoint pnt = [NSEvent mouseLocation];
    FlipCocoaScreenCoordinate(pnt);
    dragService->DragMoved(NSToIntRound(pnt.x), NSToIntRound(pnt.y));
  }
}

// NSDraggingSource
- (void)draggedImage:(NSImage *)anImage endedAt:(NSPoint)aPoint operation:(NSDragOperation)operation
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  gDraggedTransferables = nsnull;

  NSEvent *currentEvent = [NSApp currentEvent];
  gUserCancelledDrag = ([currentEvent type] == NSKeyDown &&
                        [currentEvent keyCode] == kEscapeKeyCode);

  if (!mDragService) {
    CallGetService(kDragServiceContractID, &mDragService);
    NS_ASSERTION(mDragService, "Couldn't get a drag service - big problem!");
  }

  if (mDragService) {
    // set the dragend point from the current mouse location
    nsDragService* dragService = static_cast<nsDragService *>(mDragService);
    NSPoint pnt = [NSEvent mouseLocation];
    FlipCocoaScreenCoordinate(pnt);
    dragService->SetDragEndPoint(nsIntPoint(NSToIntRound(pnt.x), NSToIntRound(pnt.y)));

    // XXX: dropEffect should be updated per |operation|. 
    // As things stand though, |operation| isn't well handled within "our"
    // events, that is, when the drop happens within the window: it is set
    // either to NSDragOperationGeneric or to NSDragOperationNone.
    // For that reason, it's not yet possible to override dropEffect per the
    // given OS value, and it's also unclear what's the correct dropEffect 
    // value for NSDragOperationGeneric that is passed by other applications.
    // All that said, NSDragOperationNone is still reliable.
    if (operation == NSDragOperationNone) {
      nsCOMPtr<nsIDOMDataTransfer> dataTransfer;
      dragService->GetDataTransfer(getter_AddRefs(dataTransfer));
      nsCOMPtr<nsIDOMNSDataTransfer> dataTransferNS =
        do_QueryInterface(dataTransfer);

      if (dataTransferNS)
        dataTransferNS->SetDropEffectInt(nsIDragService::DRAGDROP_ACTION_NONE);
    }

    mDragService->EndDragSession(PR_TRUE);
    NS_RELEASE(mDragService);
  }

  [globalDragPboard release];
  globalDragPboard = nil;
  [gLastDragMouseDownEvent release];
  gLastDragMouseDownEvent = nil;

  NS_OBJC_END_TRY_ABORT_BLOCK;
}

// NSDraggingSource
// this is just implemented so we comply with the NSDraggingSource informal protocol
- (NSDragOperation)draggingSourceOperationMaskForLocal:(BOOL)isLocal
{
  return UINT_MAX;
}

// This method is a callback typically invoked in response to a drag ending on the desktop
// or a Findow folder window; the argument passed is a path to the drop location, to be used
// in constructing a complete pathname for the file(s) we want to create as a result of
// the drag.
- (NSArray *)namesOfPromisedFilesDroppedAtDestination:(NSURL*)dropDestination
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;

  nsresult rv;

  PR_LOG(sCocoaLog, PR_LOG_ALWAYS, ("ChildView namesOfPromisedFilesDroppedAtDestination: entering callback for promised files\n"));

  nsCOMPtr<nsILocalFile> targFile;
  NS_NewLocalFile(EmptyString(), PR_TRUE, getter_AddRefs(targFile));
  nsCOMPtr<nsILocalFileMac> macLocalFile = do_QueryInterface(targFile);
  if (!macLocalFile) {
    NS_ERROR("No Mac local file");
    return nil;
  }

  if (!NS_SUCCEEDED(macLocalFile->InitWithCFURL((CFURLRef)dropDestination))) {
    NS_ERROR("failed InitWithCFURL");
    return nil;
  }

  if (!gDraggedTransferables)
    return nil;

  PRUint32 transferableCount;
  rv = gDraggedTransferables->Count(&transferableCount);
  if (NS_FAILED(rv))
    return nil;

  for (PRUint32 i = 0; i < transferableCount; i++) {
    nsCOMPtr<nsISupports> genericItem;
    gDraggedTransferables->GetElementAt(i, getter_AddRefs(genericItem));
    nsCOMPtr<nsITransferable> item(do_QueryInterface(genericItem));
    if (!item) {
      NS_ERROR("no transferable");
      return nil;
    }

    item->SetTransferData(kFilePromiseDirectoryMime, macLocalFile, sizeof(nsILocalFile*));
    
    // now request the kFilePromiseMime data, which will invoke the data provider
    // If successful, the returned data is a reference to the resulting file.
    nsCOMPtr<nsISupports> fileDataPrimitive;
    PRUint32 dataSize = 0;
    item->GetTransferData(kFilePromiseMime, getter_AddRefs(fileDataPrimitive), &dataSize);
  }
  
  NSPasteboard* generalPboard = [NSPasteboard pasteboardWithName:NSDragPboard];
  NSData* data = [generalPboard dataForType:@"application/x-moz-file-promise-dest-filename"];
  NSString* name = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
  NSArray* rslt = [NSArray arrayWithObject:name];

  [name release];

  return rslt;

  NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}

#pragma mark -

// Support for the "Services" menu. We currently only support sending strings
// and HTML to system services.

- (id)validRequestorForSendType:(NSString *)sendType
                     returnType:(NSString *)returnType
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;

  // sendType contains the type of data that the service would like this
  // application to send to it.  sendType is nil if the service is not
  // requesting any data.
  //
  // returnType contains the type of data the the service would like to
  // return to this application (e.g., to overwrite the selection).
  // returnType is nil if the service will not return any data.
  //
  // The following condition thus triggers when the service expects a string
  // or HTML from us or no data at all AND when the service will either not
  // send back any data to us or will send a string or HTML back to us.

#define IsSupportedType(typeStr) ([typeStr isEqual:NSStringPboardType] || [typeStr isEqual:NSHTMLPboardType])

  id result = nil;

  if ((!sendType || IsSupportedType(sendType)) &&
      (!returnType || IsSupportedType(returnType))) {
    if (mGeckoChild) {
      // Assume that this object will be able to handle this request.
      result = self;

      // Keep the ChildView alive during this operation.
      nsAutoRetainCocoaObject kungFuDeathGrip(self);
      
      // Determine if there is a selection (if sending to the service).
      if (sendType) {
        nsQueryContentEvent event(PR_TRUE, NS_QUERY_CONTENT_STATE, mGeckoChild);
        // This might destroy our widget (and null out mGeckoChild).
        mGeckoChild->DispatchWindowEvent(event);
        if (!mGeckoChild || !event.mSucceeded || !event.mReply.mHasSelection)
          result = nil;
      }

      // Determine if we can paste (if receiving data from the service).
      if (mGeckoChild && returnType) {
        nsContentCommandEvent command(PR_TRUE, NS_CONTENT_COMMAND_PASTE_TRANSFERABLE, mGeckoChild, PR_TRUE);
        // This might possibly destroy our widget (and null out mGeckoChild).
        mGeckoChild->DispatchWindowEvent(command);
        if (!mGeckoChild || !command.mSucceeded || !command.mIsEnabled)
          result = nil;
      }
    }
  }

#undef IsSupportedType

  // Give the superclass a chance if this object will not handle this request.
  if (!result)
    result = [super validRequestorForSendType:sendType returnType:returnType];

  return result;

  NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}

- (BOOL)writeSelectionToPasteboard:(NSPasteboard *)pboard
                             types:(NSArray *)types
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN;

  nsAutoRetainCocoaObject kungFuDeathGrip(self);

  // Make sure that the service will accept strings or HTML.
  if ([types containsObject:NSStringPboardType] == NO &&
      [types containsObject:NSHTMLPboardType] == NO)
    return NO;

  // Bail out if there is no Gecko object.
  if (!mGeckoChild)
    return NO;

  // Obtain the current selection.
  nsQueryContentEvent event(PR_TRUE,
                            NS_QUERY_SELECTION_AS_TRANSFERABLE,
                            mGeckoChild);
  mGeckoChild->DispatchWindowEvent(event);
  if (!event.mSucceeded || !event.mReply.mTransferable)
    return NO;

  // Transform the transferable to an NSDictionary.
  NSDictionary* pasteboardOutputDict = nsClipboard::PasteboardDictFromTransferable(event.mReply.mTransferable);
  if (!pasteboardOutputDict)
    return NO;

  // Declare the pasteboard types.
  unsigned int typeCount = [pasteboardOutputDict count];
  NSMutableArray * types = [NSMutableArray arrayWithCapacity:typeCount];
  [types addObjectsFromArray:[pasteboardOutputDict allKeys]];
  [pboard declareTypes:types owner:nil];

  // Write the data to the pasteboard.
  for (unsigned int i = 0; i < typeCount; i++) {
    NSString* currentKey = [types objectAtIndex:i];
    id currentValue = [pasteboardOutputDict valueForKey:currentKey];

    if (currentKey == NSStringPboardType ||
        currentKey == kCorePboardType_url ||
        currentKey == kCorePboardType_urld ||
        currentKey == kCorePboardType_urln) {
      [pboard setString:currentValue forType:currentKey];
    } else if (currentKey == NSHTMLPboardType) {
      [pboard setString:(nsClipboard::WrapHtmlForSystemPasteboard(currentValue)) forType:currentKey];
    } else if (currentKey == NSTIFFPboardType) {
      [pboard setData:currentValue forType:currentKey];
    } else if (currentKey == NSFilesPromisePboardType) {
      [pboard setPropertyList:currentValue forType:currentKey];        
    }
  }

  return YES;

  NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(NO);
}

// Called if the service wants us to replace the current selection.
- (BOOL)readSelectionFromPasteboard:(NSPasteboard *)pboard
{
  nsresult rv;
  nsCOMPtr<nsITransferable> trans = do_CreateInstance("@mozilla.org/widget/transferable;1", &rv);
  if (NS_FAILED(rv))
    return NO;

  trans->AddDataFlavor(kUnicodeMime);
  trans->AddDataFlavor(kHTMLMime);

  rv = nsClipboard::TransferableFromPasteboard(trans, pboard);
  if (NS_FAILED(rv))
    return NO;

  NS_ENSURE_TRUE(mGeckoChild, PR_FALSE);

  nsContentCommandEvent command(PR_TRUE,
                                NS_CONTENT_COMMAND_PASTE_TRANSFERABLE,
                                mGeckoChild);
  command.mTransferable = trans;
  mGeckoChild->DispatchWindowEvent(command);
  
  return command.mSucceeded && command.mIsEnabled;
}

#pragma mark -

#ifdef ACCESSIBILITY

/* Every ChildView has a corresponding mozDocAccessible object that is doing all
   the heavy lifting. The topmost ChildView corresponds to a mozRootAccessible
   object.

   All ChildView needs to do is to route all accessibility calls (from the NSAccessibility APIs)
   down to its object, pretending that they are the same.
*/
- (id<mozAccessible>)accessible
{
  if (!mGeckoChild)
    return nil;

  id<mozAccessible> nativeAccessible = nil;

  nsAutoRetainCocoaObject kungFuDeathGrip(self);
  nsCOMPtr<nsIWidget> kungFuDeathGrip2(mGeckoChild);
  nsRefPtr<nsAccessible> accessible = mGeckoChild->GetDocumentAccessible();
  if (!mGeckoChild)
    return nil;

  if (accessible)
    accessible->GetNativeInterface((void**)&nativeAccessible);

#ifdef DEBUG_hakan
  NSAssert(![nativeAccessible isExpired], @"native acc is expired!!!");
#endif
  
  return nativeAccessible;
}

/* Implementation of formal mozAccessible formal protocol (enabling mozViews
   to talk to mozAccessible objects in the accessibility module). */

- (BOOL)hasRepresentedView
{
  return YES;
}

- (id)representedView
{
  return self;
}

- (BOOL)isRoot
{
  return [[self accessible] isRoot];
}

#ifdef DEBUG
- (void)printHierarchy
{
  [[self accessible] printHierarchy];
}
#endif

#pragma mark -

// general

- (BOOL)accessibilityIsIgnored
{
  return [[self accessible] accessibilityIsIgnored];
}

- (id)accessibilityHitTest:(NSPoint)point
{
  return [[self accessible] accessibilityHitTest:point];
}

- (id)accessibilityFocusedUIElement
{
  return [[self accessible] accessibilityFocusedUIElement];
}

// actions

- (NSArray*)accessibilityActionNames
{
  return [[self accessible] accessibilityActionNames];
}

- (NSString*)accessibilityActionDescription:(NSString*)action
{
  return [[self accessible] accessibilityActionDescription:action];
}

- (void)accessibilityPerformAction:(NSString*)action
{
  return [[self accessible] accessibilityPerformAction:action];
}

// attributes

- (NSArray*)accessibilityAttributeNames
{
  return [[self accessible] accessibilityAttributeNames];
}

- (BOOL)accessibilityIsAttributeSettable:(NSString*)attribute
{
  return [[self accessible] accessibilityIsAttributeSettable:attribute];
}

- (id)accessibilityAttributeValue:(NSString*)attribute
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;

  id<mozAccessible> accessible = [self accessible];
  
  // if we're the root (topmost) accessible, we need to return our native AXParent as we
  // traverse outside to the hierarchy of whoever embeds us. thus, fall back on NSView's
  // default implementation for this attribute.
  if ([attribute isEqualToString:NSAccessibilityParentAttribute] && [accessible isRoot]) {
    id parentAccessible = [super accessibilityAttributeValue:attribute];
    return parentAccessible;
  }

  return [accessible accessibilityAttributeValue:attribute];

  NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}

#endif /* ACCESSIBILITY */

@end

#pragma mark -

void
ChildViewMouseTracker::OnDestroyView(ChildView* aView)
{
  if (sLastMouseEventView == aView) {
    sLastMouseEventView = nil;
    [sLastMouseMoveEvent release];
    sLastMouseMoveEvent = nil;
  }
}

void
ChildViewMouseTracker::OnDestroyWindow(NSWindow* aWindow)
{
  if (sWindowUnderMouse == aWindow) {
    sWindowUnderMouse = nil;
  }
}

void
ChildViewMouseTracker::MouseEnteredWindow(NSEvent* aEvent)
{
  sWindowUnderMouse = [aEvent window];
  ReEvaluateMouseEnterState(aEvent);
}

void
ChildViewMouseTracker::MouseExitedWindow(NSEvent* aEvent)
{
  if (sWindowUnderMouse == [aEvent window]) {
    sWindowUnderMouse = nil;
    ReEvaluateMouseEnterState(aEvent);
  }
}

void
ChildViewMouseTracker::ReEvaluateMouseEnterState(NSEvent* aEvent)
{
  ChildView* oldView = sLastMouseEventView;
  sLastMouseEventView = ViewForEvent(aEvent);
  if (sLastMouseEventView != oldView) {
    // Send enter and / or exit events.
    nsMouseEvent::exitType type = [sLastMouseEventView window] == [oldView window] ?
                                    nsMouseEvent::eChild : nsMouseEvent::eTopLevel;
    [oldView sendMouseEnterOrExitEvent:aEvent enter:NO type:type];
    // After the cursor exits the window set it to a visible regular arrow cursor.
    if (type == nsMouseEvent::eTopLevel) {
      [[nsCursorManager sharedInstance] setCursor:eCursor_standard];
    }
    [sLastMouseEventView sendMouseEnterOrExitEvent:aEvent enter:YES type:type];
  }
}

void
ChildViewMouseTracker::ResendLastMouseMoveEvent()
{
  if (sLastMouseMoveEvent) {
    MouseMoved(sLastMouseMoveEvent);
  }
}

void
ChildViewMouseTracker::MouseMoved(NSEvent* aEvent)
{
  MouseEnteredWindow(aEvent);
  [sLastMouseEventView handleMouseMoved:aEvent];
  if (sLastMouseMoveEvent != aEvent) {
    [sLastMouseMoveEvent release];
    sLastMouseMoveEvent = [aEvent retain];
  }
}

void
ChildViewMouseTracker::MouseScrolled(NSEvent* aEvent)
{
  if (!nsCocoaUtils::IsMomentumScrollEvent(aEvent)) {
    // Store the position so we can pin future momentum scroll events.
    sLastScrollEventScreenLocation = nsCocoaUtils::ScreenLocationForEvent(aEvent);
  }
}

ChildView*
ChildViewMouseTracker::ViewForEvent(NSEvent* aEvent)
{
  NSWindow* window = sWindowUnderMouse;
  if (!window)
    return nil;

  NSPoint windowEventLocation = nsCocoaUtils::EventLocationForWindow(aEvent, window);
  NSView* view = [[[window contentView] superview] hitTest:windowEventLocation];
  if (![view isKindOfClass:[ChildView class]])
    return nil;

  ChildView* childView = (ChildView*)view;
  // If childView is being destroyed return nil.
  if (![childView widget])
    return nil;
  return WindowAcceptsEvent(window, aEvent, childView) ? childView : nil;
}

BOOL
ChildViewMouseTracker::WindowAcceptsEvent(NSWindow* aWindow, NSEvent* aEvent,
                                          ChildView* aView, BOOL aIsClickThrough)
{
  // Right mouse down events may get through to all windows, even to a top level
  // window with an open sheet.
  if (!aWindow || [aEvent type] == NSRightMouseDown)
    return YES;

  id delegate = [aWindow delegate];
  if (!delegate || ![delegate isKindOfClass:[WindowDelegate class]])
    return YES;

  nsIWidget *windowWidget = [(WindowDelegate *)delegate geckoWidget];
  if (!windowWidget)
    return YES;

  nsWindowType windowType;
  windowWidget->GetWindowType(windowType);

  NSWindow* topLevelWindow = nil;

  switch (windowType) {
    case eWindowType_popup:
      // If this is a context menu, it won't have a parent. So we'll always
      // accept mouse move events on context menus even when none of our windows
      // is active, which is the right thing to do.
      // For panels, the parent window is the XUL window that owns the panel.
      return WindowAcceptsEvent([aWindow parentWindow], aEvent, aView, aIsClickThrough);

    case eWindowType_toplevel:
    case eWindowType_dialog:
      if ([aWindow attachedSheet])
        return NO;

      topLevelWindow = aWindow;
      break;
    case eWindowType_sheet: {
      nsIWidget* parentWidget = windowWidget->GetSheetWindowParent();
      if (!parentWidget)
        return YES;

      topLevelWindow = (NSWindow*)parentWidget->GetNativeData(NS_NATIVE_WINDOW);
      break;
    }

    default:
      return YES;
  }

  if (!topLevelWindow ||
      ([topLevelWindow isMainWindow] && !aIsClickThrough) ||
      [aEvent type] == NSOtherMouseDown ||
      (([aEvent modifierFlags] & NSCommandKeyMask) != 0 &&
       [aEvent type] != NSMouseMoved))
    return YES;

  // If we're here then we're dealing with a left click or mouse move on an
  // inactive window or something similar. Ask Gecko what to do.
  return [aView inactiveWindowAcceptsMouseEvent:aEvent];
}

#pragma mark -

@interface NSView (MethodSwizzling)
- (BOOL)nsChildView_NSView_mouseDownCanMoveWindow;
@end

@implementation NSView (MethodSwizzling)

// All top-level browser windows belong to the ToolbarWindow class and have
// NSTexturedBackgroundWindowMask turned on in their "style" (see particularly
// [ToolbarWindow initWithContentRect:...] in nsCocoaWindow.mm).  This style
// normally means the window "may be moved by clicking and dragging anywhere
// in the window background", but we've suppressed this by giving the
// ChildView class a mouseDownCanMoveWindow method that always returns NO.
// Normally a ToolbarWindow's contentView (not a ChildView) returns YES when
// NSTexturedBackgroundWindowMask is turned on.  But normally this makes no
// difference.  However, under some (probably very unusual) circumstances
// (and only on Leopard) it *does* make a difference -- for example it
// triggers bmo bugs 431902 and 476393.  So here we make sure that a
// ToolbarWindow's contentView always returns NO from the
// mouseDownCanMoveWindow method.
- (BOOL)nsChildView_NSView_mouseDownCanMoveWindow
{
  NSWindow *ourWindow = [self window];
  NSView *contentView = [ourWindow contentView];
  if ([ourWindow isKindOfClass:[ToolbarWindow class]] && (self == contentView))
    return NO;
  return [self nsChildView_NSView_mouseDownCanMoveWindow];
}

@end

#ifdef __LP64__
// When using blocks, at least on OS X 10.7, the OS sometimes calls
// +[NSEvent removeMonitor:] more than once on a single event monitor, which
// causes crashes.  See bug 678607.  We hook these methods to work around
// the problem.
@interface NSEvent (MethodSwizzling)
+ (id)nsChildView_NSEvent_addLocalMonitorForEventsMatchingMask:(unsigned long long)mask handler:(id)block;
+ (void)nsChildView_NSEvent_removeMonitor:(id)eventMonitor;
@end

// This is a local copy of the AppKit frameworks sEventObservers hashtable.
// It only stores "local monitors".  We use it to ensure that +[NSEvent
// removeMonitor:] is never called more than once on the same local monitor.
static NSHashTable *sLocalEventObservers = nil;

@implementation NSEvent (MethodSwizzling)

+ (id)nsChildView_NSEvent_addLocalMonitorForEventsMatchingMask:(unsigned long long)mask handler:(id)block
{
  if (!sLocalEventObservers) {
    sLocalEventObservers = [[NSHashTable hashTableWithOptions:
      NSHashTableStrongMemory | NSHashTableObjectPointerPersonality] retain];
  }
  id retval =
    [self nsChildView_NSEvent_addLocalMonitorForEventsMatchingMask:mask handler:block];
  if (sLocalEventObservers && retval && ![sLocalEventObservers containsObject:retval]) {
    [sLocalEventObservers addObject:retval];
  }
  return retval;
}

+ (void)nsChildView_NSEvent_removeMonitor:(id)eventMonitor
{
  if (sLocalEventObservers && [eventMonitor isKindOfClass: ::NSClassFromString(@"_NSLocalEventObserver")]) {
    if (![sLocalEventObservers containsObject:eventMonitor]) {
      return;
    }
    [sLocalEventObservers removeObject:eventMonitor];
  }
  [self nsChildView_NSEvent_removeMonitor:eventMonitor];
}

@end
#endif // #ifdef __LP64__