summaryrefslogtreecommitdiffstats
path: root/toolkit/components/windowwatcher/nsWindowWatcher.cpp
blob: b482214d31fe2a50ad075b424bc3f97edbc5148b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsWindowWatcher.h"
#include "nsAutoWindowStateHelper.h"

#include "nsCRT.h"
#include "nsDebug.h"
#include "nsNetUtil.h"
#include "nsIAuthPrompt.h"
#include "nsIAuthPrompt2.h"
#include "nsISimpleEnumerator.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsJSUtils.h"

#include "nsDocShell.h"
#include "nsGlobalWindowInner.h"
#include "nsGlobalWindowOuter.h"
#include "nsHashPropertyBag.h"
#include "nsIBaseWindow.h"
#include "nsIBrowserDOMWindow.h"
#include "nsIDocShell.h"
#include "nsDocShellLoadState.h"
#include "nsIDocShellTreeItem.h"
#include "nsIDocShellTreeOwner.h"
#include "mozilla/dom/BrowsingContext.h"
#include "mozilla/dom/BrowsingContextGroup.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/DocumentInlines.h"
#include "mozilla/dom/UserActivation.h"
#include "nsIDragService.h"
#include "nsIPrompt.h"
#include "nsIScriptObjectPrincipal.h"
#include "nsIScreen.h"
#include "nsIScreenManager.h"
#include "nsIScriptContext.h"
#include "nsIObserverService.h"
#include "nsXPCOM.h"
#include "nsIURI.h"
#include "nsIWebBrowser.h"
#include "nsIWebBrowserChrome.h"
#include "nsIWebNavigation.h"
#include "nsIWindowCreator.h"
#include "nsIXULRuntime.h"
#include "nsPIDOMWindow.h"
#include "nsIWindowProvider.h"
#include "nsIMutableArray.h"
#include "nsIDOMStorageManager.h"
#include "nsIWidget.h"
#include "nsFocusManager.h"
#include "nsOpenWindowInfo.h"
#include "nsPresContext.h"
#include "nsContentUtils.h"
#include "nsIPrefBranch.h"
#include "nsIPrefService.h"
#include "nsSandboxFlags.h"
#include "nsSimpleEnumerator.h"
#include "mozilla/BasePrincipal.h"
#include "mozilla/CheckedInt.h"
#include "mozilla/NullPrincipal.h"
#include "mozilla/Preferences.h"
#include "mozilla/ResultExtensions.h"
#include "mozilla/StaticPrefs_browser.h"
#include "mozilla/StaticPrefs_full_screen_api.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/Storage.h"
#include "mozilla/dom/ScriptSettings.h"
#include "mozilla/dom/BrowserParent.h"
#include "mozilla/dom/BrowserHost.h"
#include "mozilla/dom/DocGroup.h"
#include "mozilla/dom/WindowGlobalChild.h"
#include "mozilla/dom/SessionStorageManager.h"
#include "nsIAppWindow.h"
#include "nsIXULBrowserWindow.h"
#include "ReferrerInfo.h"

using namespace mozilla;
using namespace mozilla::dom;

/****************************************************************
 ******************** nsWatcherWindowEntry **********************
 ****************************************************************/

class nsWindowWatcher;

struct nsWatcherWindowEntry {
  nsWatcherWindowEntry(mozIDOMWindowProxy* aWindow,
                       nsIWebBrowserChrome* aChrome)
      : mChrome(nullptr) {
    mWindow = aWindow;
    nsCOMPtr<nsISupportsWeakReference> supportsweak(do_QueryInterface(aChrome));
    if (supportsweak) {
      supportsweak->GetWeakReference(getter_AddRefs(mChromeWeak));
    } else {
      mChrome = aChrome;
      mChromeWeak = nullptr;
    }
    ReferenceSelf();
  }
  ~nsWatcherWindowEntry() = default;

  void InsertAfter(nsWatcherWindowEntry* aOlder);
  void Unlink();
  void ReferenceSelf();

  mozIDOMWindowProxy* mWindow;
  nsIWebBrowserChrome* mChrome;
  nsWeakPtr mChromeWeak;
  // each struct is in a circular, doubly-linked list
  nsWatcherWindowEntry* mYounger;  // next younger in sequence
  nsWatcherWindowEntry* mOlder;
};

void nsWatcherWindowEntry::InsertAfter(nsWatcherWindowEntry* aOlder) {
  if (aOlder) {
    mOlder = aOlder;
    mYounger = aOlder->mYounger;
    mOlder->mYounger = this;
    if (mOlder->mOlder == mOlder) {
      mOlder->mOlder = this;
    }
    mYounger->mOlder = this;
    if (mYounger->mYounger == mYounger) {
      mYounger->mYounger = this;
    }
  }
}

void nsWatcherWindowEntry::Unlink() {
  mOlder->mYounger = mYounger;
  mYounger->mOlder = mOlder;
  ReferenceSelf();
}

void nsWatcherWindowEntry::ReferenceSelf() {
  mYounger = this;
  mOlder = this;
}

/****************************************************************
 ****************** nsWatcherWindowEnumerator *******************
 ****************************************************************/

class nsWatcherWindowEnumerator : public nsSimpleEnumerator {
 public:
  explicit nsWatcherWindowEnumerator(nsWindowWatcher* aWatcher);
  NS_IMETHOD HasMoreElements(bool* aResult) override;
  NS_IMETHOD GetNext(nsISupports** aResult) override;

 protected:
  ~nsWatcherWindowEnumerator() override;

 private:
  friend class nsWindowWatcher;

  nsWatcherWindowEntry* FindNext();
  void WindowRemoved(nsWatcherWindowEntry* aInfo);

  nsWindowWatcher* mWindowWatcher;
  nsWatcherWindowEntry* mCurrentPosition;
};

nsWatcherWindowEnumerator::nsWatcherWindowEnumerator(nsWindowWatcher* aWatcher)
    : mWindowWatcher(aWatcher), mCurrentPosition(aWatcher->mOldestWindow) {
  mWindowWatcher->AddEnumerator(this);
  mWindowWatcher->AddRef();
}

nsWatcherWindowEnumerator::~nsWatcherWindowEnumerator() {
  mWindowWatcher->RemoveEnumerator(this);
  mWindowWatcher->Release();
}

NS_IMETHODIMP
nsWatcherWindowEnumerator::HasMoreElements(bool* aResult) {
  if (!aResult) {
    return NS_ERROR_INVALID_ARG;
  }

  *aResult = !!mCurrentPosition;
  return NS_OK;
}

NS_IMETHODIMP
nsWatcherWindowEnumerator::GetNext(nsISupports** aResult) {
  if (!aResult) {
    return NS_ERROR_INVALID_ARG;
  }

  *aResult = nullptr;

  if (mCurrentPosition) {
    CallQueryInterface(mCurrentPosition->mWindow, aResult);
    mCurrentPosition = FindNext();
    return NS_OK;
  }
  return NS_ERROR_FAILURE;
}

nsWatcherWindowEntry* nsWatcherWindowEnumerator::FindNext() {
  nsWatcherWindowEntry* info;

  if (!mCurrentPosition) {
    return nullptr;
  }

  info = mCurrentPosition->mYounger;
  return info == mWindowWatcher->mOldestWindow ? nullptr : info;
}

// if a window is being removed adjust the iterator's current position
void nsWatcherWindowEnumerator::WindowRemoved(nsWatcherWindowEntry* aInfo) {
  if (mCurrentPosition == aInfo) {
    mCurrentPosition =
        mCurrentPosition != aInfo->mYounger ? aInfo->mYounger : nullptr;
  }
}

/****************************************************************
 *********************** nsWindowWatcher ************************
 ****************************************************************/

NS_IMPL_ADDREF(nsWindowWatcher)
NS_IMPL_RELEASE(nsWindowWatcher)
NS_IMPL_QUERY_INTERFACE(nsWindowWatcher, nsIWindowWatcher, nsIPromptFactory,
                        nsPIWindowWatcher)

nsWindowWatcher::nsWindowWatcher()
    : mOldestWindow(nullptr), mListLock("nsWindowWatcher.mListLock") {}

nsWindowWatcher::~nsWindowWatcher() {
  // delete data
  while (mOldestWindow) {
    RemoveWindow(mOldestWindow);
  }
}

nsresult nsWindowWatcher::Init() { return NS_OK; }

/**
 * Convert aArguments into either an nsIArray or nullptr.
 *
 *  - If aArguments is nullptr, return nullptr.
 *  - If aArguments is an nsArray, return nullptr if it's empty, or otherwise
 *    return the array.
 *  - If aArguments is an nsIArray, return nullptr if it's empty, or
 *    otherwise just return the array.
 *  - Otherwise, return an nsIArray with one element: aArguments.
 */
static already_AddRefed<nsIArray> ConvertArgsToArray(nsISupports* aArguments) {
  if (!aArguments) {
    return nullptr;
  }

  nsCOMPtr<nsIArray> array = do_QueryInterface(aArguments);
  if (array) {
    uint32_t argc = 0;
    array->GetLength(&argc);
    if (argc == 0) {
      return nullptr;
    }

    return array.forget();
  }

  nsCOMPtr<nsIMutableArray> singletonArray =
      do_CreateInstance(NS_ARRAY_CONTRACTID);
  NS_ENSURE_TRUE(singletonArray, nullptr);

  nsresult rv = singletonArray->AppendElement(aArguments);
  NS_ENSURE_SUCCESS(rv, nullptr);

  return singletonArray.forget();
}

NS_IMETHODIMP
nsWindowWatcher::OpenWindow(mozIDOMWindowProxy* aParent, const nsACString& aUrl,
                            const nsACString& aName,
                            const nsACString& aFeatures,
                            nsISupports* aArguments,
                            mozIDOMWindowProxy** aResult) {
  nsCOMPtr<nsIArray> argv = ConvertArgsToArray(aArguments);

  uint32_t argc = 0;
  if (argv) {
    argv->GetLength(&argc);
  }
  bool dialog = (argc != 0);

  RefPtr<BrowsingContext> bc;
  MOZ_TRY(OpenWindowInternal(aParent, aUrl, aName, aFeatures,
                             mozilla::dom::UserActivation::Modifiers::None(),
                             /* calledFromJS = */ false, dialog,
                             /* navigate = */ true, argv,
                             /* aIsPopupSpam = */ false,
                             /* aForceNoOpener = */ false,
                             /* aForceNoReferrer = */ false, PRINT_NONE,
                             /* aLoadState = */ nullptr, getter_AddRefs(bc)));
  if (bc) {
    nsCOMPtr<mozIDOMWindowProxy> win(bc->GetDOMWindow());
    win.forget(aResult);
  }
  return NS_OK;
}

struct SizeSpec {
  SizeSpec() = default;

  // We store these in screen-independent pixels.
  Maybe<DesktopIntCoord> mLeft;
  Maybe<DesktopIntCoord> mTop;
  Maybe<CSSIntCoord> mOuterWidth;   // Total window width
  Maybe<CSSIntCoord> mOuterHeight;  // Total window height
  Maybe<CSSIntCoord> mInnerWidth;   // Content area width
  Maybe<CSSIntCoord> mInnerHeight;  // Content area height

  bool mLockAspectRatio = false;

  bool PositionSpecified() const { return mLeft.isSome() || mTop.isSome(); }

  bool SizeSpecified() const { return WidthSpecified() || HeightSpecified(); }

  bool WidthSpecified() const {
    return mOuterWidth.isSome() || mInnerWidth.isSome();
  }

  bool HeightSpecified() const {
    return mOuterHeight.isSome() || mInnerHeight.isSome();
  }

  void ScaleBy(float aOpenerZoom) {
    if (aOpenerZoom == 1.0f) {
      return;
    }
    auto Scale = [&aOpenerZoom](auto& aValue) {
      if (aValue) {
        *aValue = NSToIntRound(*aValue * aOpenerZoom);
      }
    };
    // Scaling the position is needed to make sure that the window position is
    // what the caller expects.
    Scale(mLeft);
    Scale(mTop);

    // Scaling these CSS sizes by the zoom factor might be a bit dubious, as the
    // created window should not be zoomed, but we've done that historically...
    Scale(mOuterWidth);
    Scale(mOuterHeight);
    Scale(mInnerWidth);
    Scale(mInnerHeight);
  }
};

static void SizeOpenedWindow(nsIDocShellTreeOwner* aTreeOwner,
                             mozIDOMWindowProxy* aParent, bool aIsCallerChrome,
                             const SizeSpec&);
static SizeSpec CalcSizeSpec(const WindowFeatures&, bool aHasChromeParent,
                             CSSToDesktopScale);

NS_IMETHODIMP
nsWindowWatcher::OpenWindow2(
    mozIDOMWindowProxy* aParent, const nsACString& aUrl,
    const nsACString& aName, const nsACString& aFeatures,
    const UserActivation::Modifiers& aModifiers, bool aCalledFromScript,
    bool aDialog, bool aNavigate, nsISupports* aArguments, bool aIsPopupSpam,
    bool aForceNoOpener, bool aForceNoReferrer, PrintKind aPrintKind,
    nsDocShellLoadState* aLoadState, BrowsingContext** aResult) {
  nsCOMPtr<nsIArray> argv = ConvertArgsToArray(aArguments);

  uint32_t argc = 0;
  if (argv) {
    argv->GetLength(&argc);
  }

  // This is extremely messed up, but this behavior is necessary because
  // callers lie about whether they're a dialog window and whether they're
  // called from script.  Fixing this is bug 779939.
  bool dialog = aDialog;
  if (!aCalledFromScript) {
    dialog = argc > 0;
  }

  return OpenWindowInternal(aParent, aUrl, aName, aFeatures, aModifiers,
                            aCalledFromScript, dialog, aNavigate, argv,
                            aIsPopupSpam, aForceNoOpener, aForceNoReferrer,
                            aPrintKind, aLoadState, aResult);
}

// This static function checks if the aDocShell uses an UserContextId equal to
// the userContextId of subjectPrincipal, if not null.
static bool CheckUserContextCompatibility(nsIDocShell* aDocShell) {
  MOZ_ASSERT(aDocShell);

  uint32_t userContextId =
      static_cast<nsDocShell*>(aDocShell)->GetOriginAttributes().mUserContextId;

  nsCOMPtr<nsIPrincipal> subjectPrincipal =
      nsContentUtils::GetCurrentJSContext() ? nsContentUtils::SubjectPrincipal()
                                            : nullptr;

  // If we don't have a valid principal, probably we are in e10s mode, parent
  // side.
  if (!subjectPrincipal) {
    return true;
  }

  // DocShell can have UsercontextID set but loading a document with system
  // principal. In this case, we consider everything ok.
  if (subjectPrincipal->IsSystemPrincipal()) {
    return true;
  }

  return subjectPrincipal->GetUserContextId() == userContextId;
}

nsresult nsWindowWatcher::CreateChromeWindow(nsIWebBrowserChrome* aParentChrome,
                                             uint32_t aChromeFlags,
                                             nsIOpenWindowInfo* aOpenWindowInfo,
                                             nsIWebBrowserChrome** aResult) {
  if (NS_WARN_IF(!mWindowCreator)) {
    return NS_ERROR_UNEXPECTED;
  }

  bool cancel = false;
  if (aChromeFlags & nsIWebBrowserChrome::CHROME_OPENAS_DIALOG) {
    // If there are any drag and drop operations in flight, try to end them.
    nsCOMPtr<nsIDragService> ds =
        do_GetService("@mozilla.org/widget/dragservice;1");
    if (ds) {
      ds->EndDragSession(true, 0);
    }
  }
  nsCOMPtr<nsIWebBrowserChrome> newWindowChrome;
  nsresult rv = mWindowCreator->CreateChromeWindow(
      aParentChrome, aChromeFlags, aOpenWindowInfo, &cancel,
      getter_AddRefs(newWindowChrome));

  if (NS_SUCCEEDED(rv) && cancel) {
    newWindowChrome = nullptr;
    return NS_ERROR_ABORT;
  }

  newWindowChrome.forget(aResult);
  return NS_OK;
}

/**
 * Disable persistence of size/position in popups (determined by
 * determining whether the features parameter specifies width or height
 * in any way). We consider any overriding of the window's size or position
 * in the open call as disabling persistence of those attributes.
 * Popup windows (which should not persist size or position) generally set
 * the size.
 *
 * @param aFeatures
 *        The features that was used to open the window.
 * @param aTreeOwner
 *        The nsIDocShellTreeOwner of the newly opened window. If null,
 *        this function is a no-op.
 */
static void MaybeDisablePersistence(const SizeSpec& aSizeSpec,
                                    nsIDocShellTreeOwner* aTreeOwner) {
  if (!aTreeOwner) {
    return;
  }

  if (aSizeSpec.SizeSpecified()) {
    aTreeOwner->SetPersistence(false, false, false);
  }
}

NS_IMETHODIMP
nsWindowWatcher::OpenWindowWithRemoteTab(
    nsIRemoteTab* aRemoteTab, const WindowFeatures& aFeatures,
    const UserActivation::Modifiers& aModifiers, bool aCalledFromJS,
    float aOpenerFullZoom, nsIOpenWindowInfo* aOpenWindowInfo,
    nsIRemoteTab** aResult) {
  MOZ_ASSERT(XRE_IsParentProcess());
  MOZ_ASSERT(mWindowCreator);

  if (!nsContentUtils::IsSafeToRunScript()) {
    nsContentUtils::WarnScriptWasIgnored(nullptr);
    return NS_ERROR_FAILURE;
  }

  if (NS_WARN_IF(!mWindowCreator)) {
    return NS_ERROR_UNEXPECTED;
  }

  bool isFissionWindow = FissionAutostart();
  bool isPrivateBrowsingWindow =
      StaticPrefs::browser_privatebrowsing_autostart();

  nsCOMPtr<nsPIDOMWindowOuter> parentWindowOuter;
  RefPtr<BrowsingContext> parentBC = aOpenWindowInfo->GetParent();
  if (parentBC) {
    RefPtr<Element> browserElement = parentBC->Top()->GetEmbedderElement();
    if (browserElement && browserElement->GetOwnerGlobal() &&
        browserElement->GetOwnerGlobal()->GetAsInnerWindow()) {
      parentWindowOuter = browserElement->GetOwnerGlobal()
                              ->GetAsInnerWindow()
                              ->GetOuterWindow();
    }

    isFissionWindow = parentBC->UseRemoteSubframes();
    isPrivateBrowsingWindow =
        isPrivateBrowsingWindow || parentBC->UsePrivateBrowsing();
  }

  if (!parentWindowOuter) {
    // We couldn't find a browser window for the opener, so either we
    // never were passed aRemoteTab, the window is closed,
    // or it's in the process of closing. Either way, we'll use
    // the most recently opened browser window instead.
    parentWindowOuter = nsContentUtils::GetMostRecentNonPBWindow();
  }

  if (NS_WARN_IF(!parentWindowOuter)) {
    return NS_ERROR_UNEXPECTED;
  }

  nsCOMPtr<nsIDocShellTreeOwner> parentTreeOwner =
      parentWindowOuter->GetTreeOwner();
  if (NS_WARN_IF(!parentTreeOwner)) {
    return NS_ERROR_UNEXPECTED;
  }

  if (NS_WARN_IF(!mWindowCreator)) {
    return NS_ERROR_UNEXPECTED;
  }

  // get various interfaces for aDocShellItem, used throughout this method
  CSSToDesktopScale cssToDesktopScale(1.0f);
  if (nsCOMPtr<nsIBaseWindow> win = do_QueryInterface(parentTreeOwner)) {
    cssToDesktopScale = win->GetUnscaledCSSToDesktopScale();
  }
  SizeSpec sizeSpec = CalcSizeSpec(aFeatures, false, cssToDesktopScale);
  sizeSpec.ScaleBy(aOpenerFullZoom);

  // This is not initiated by window.open call in content context, and we
  // don't need to propagate isPopupRequested out-parameter to the resulting
  // browsing context.
  bool unused = false;
  uint32_t chromeFlags =
      CalculateChromeFlagsForContent(aFeatures, aModifiers, &unused);

  if (isPrivateBrowsingWindow) {
    chromeFlags |= nsIWebBrowserChrome::CHROME_PRIVATE_WINDOW;
  }

  // A content process has asked for a new window, which implies
  // that the new window will need to be remote.
  chromeFlags |= nsIWebBrowserChrome::CHROME_REMOTE_WINDOW;

  if (isFissionWindow) {
    chromeFlags |= nsIWebBrowserChrome::CHROME_FISSION_WINDOW;
  }

  nsCOMPtr<nsIWebBrowserChrome> parentChrome(do_GetInterface(parentTreeOwner));
  nsCOMPtr<nsIWebBrowserChrome> newWindowChrome;

  CreateChromeWindow(parentChrome, chromeFlags, aOpenWindowInfo,
                     getter_AddRefs(newWindowChrome));

  if (NS_WARN_IF(!newWindowChrome)) {
    return NS_ERROR_UNEXPECTED;
  }

  nsCOMPtr<nsIDocShellTreeItem> chromeTreeItem =
      do_GetInterface(newWindowChrome);
  if (NS_WARN_IF(!chromeTreeItem)) {
    return NS_ERROR_UNEXPECTED;
  }

  nsCOMPtr<nsIDocShellTreeOwner> chromeTreeOwner;
  chromeTreeItem->GetTreeOwner(getter_AddRefs(chromeTreeOwner));
  if (NS_WARN_IF(!chromeTreeOwner)) {
    return NS_ERROR_UNEXPECTED;
  }

  nsCOMPtr<nsILoadContext> chromeContext = do_QueryInterface(chromeTreeItem);
  if (NS_WARN_IF(!chromeContext)) {
    return NS_ERROR_UNEXPECTED;
  }

  MOZ_ASSERT(chromeContext->UsePrivateBrowsing() == isPrivateBrowsingWindow);
  MOZ_ASSERT(chromeContext->UseRemoteSubframes() == isFissionWindow);

  // Tabs opened from a content process can only open new windows
  // that will also run with out-of-process tabs.
  MOZ_ASSERT(chromeContext->UseRemoteTabs());

  MaybeDisablePersistence(sizeSpec, chromeTreeOwner);

  SizeOpenedWindow(chromeTreeOwner, parentWindowOuter, false, sizeSpec);

  nsCOMPtr<nsIRemoteTab> newBrowserParent;
  chromeTreeOwner->GetPrimaryRemoteTab(getter_AddRefs(newBrowserParent));
  if (NS_WARN_IF(!newBrowserParent)) {
    return NS_ERROR_UNEXPECTED;
  }

  newBrowserParent.forget(aResult);
  return NS_OK;
}

nsresult nsWindowWatcher::OpenWindowInternal(
    mozIDOMWindowProxy* aParent, const nsACString& aUrl,
    const nsACString& aName, const nsACString& aFeatures,
    const mozilla::dom::UserActivation::Modifiers& aModifiers,
    bool aCalledFromJS, bool aDialog, bool aNavigate, nsIArray* aArgv,
    bool aIsPopupSpam, bool aForceNoOpener, bool aForceNoReferrer,
    PrintKind aPrintKind, nsDocShellLoadState* aLoadState,
    BrowsingContext** aResult) {
  MOZ_ASSERT_IF(aForceNoReferrer, aForceNoOpener);

  nsresult rv = NS_OK;
  bool isNewToplevelWindow = false;
  bool windowIsNew = false;
  bool windowNeedsName = false;
  bool windowIsModal = false;
  bool uriToLoadIsChrome = false;

  uint32_t chromeFlags;
  nsAutoString name;           // string version of aName
  nsCOMPtr<nsIURI> uriToLoad;  // from aUrl, if any
  nsCOMPtr<nsIDocShellTreeOwner>
      parentTreeOwner;               // from the parent window, if any
  RefPtr<BrowsingContext> targetBC;  // from the new window

  nsCOMPtr<nsPIDOMWindowOuter> parentOuterWin =
      aParent ? nsPIDOMWindowOuter::From(aParent) : nullptr;

  NS_ENSURE_ARG_POINTER(aResult);
  *aResult = nullptr;

  if (!nsContentUtils::IsSafeToRunScript()) {
    nsContentUtils::WarnScriptWasIgnored(nullptr);
    return NS_ERROR_FAILURE;
  }

  if (parentOuterWin) {
    parentTreeOwner = parentOuterWin->GetTreeOwner();
  }

  // We expect BrowserParent to have provided us the absolute URI of the window
  // we're to open, so there's no need to call URIfromURL (or more importantly,
  // to check for a chrome URI, which cannot be opened from a remote tab).
  if (!aUrl.IsVoid()) {
    rv = URIfromURL(aUrl, aParent, getter_AddRefs(uriToLoad));
    if (NS_FAILED(rv)) {
      return rv;
    }
    uriToLoadIsChrome = uriToLoad->SchemeIs("chrome");
  }

  bool nameSpecified = false;
  if (!aName.IsEmpty()) {
    CopyUTF8toUTF16(aName, name);
    nameSpecified = true;
  } else {
    name.SetIsVoid(true);
  }

  WindowFeatures features;
  nsAutoCString featuresStr;
  if (!aFeatures.IsEmpty()) {
    featuresStr.Assign(aFeatures);
    features.Tokenize(featuresStr);
  } else {
    featuresStr.SetIsVoid(true);
  }

  RefPtr<BrowsingContext> parentBC(
      parentOuterWin ? parentOuterWin->GetBrowsingContext() : nullptr);
  nsCOMPtr<nsIDocShell> parentDocShell(parentBC ? parentBC->GetDocShell()
                                                : nullptr);
  RefPtr<Document> parentDoc(parentOuterWin ? parentOuterWin->GetDoc()
                                            : nullptr);
  nsCOMPtr<nsPIDOMWindowInner> parentInnerWin(
      parentOuterWin ? parentOuterWin->GetCurrentInnerWindow() : nullptr);

  // Return null for any attempt to trigger a load from a discarded browsing
  // context. The spec is non-normative, and doesn't specify what should happen
  // when window.open is called on a window with a null browsing context, but it
  // does give us broad discretion over when we can decide to ignore an open
  // request and return null.
  //
  // Regardless, we cannot trigger a cross-process load from a discarded
  // browsing context, and ideally we should behave consistently whether a load
  // is same-process or cross-process.
  if (parentBC && parentBC->IsDiscarded()) {
    return NS_ERROR_ABORT;
  }

  // If no parent, consider it chrome when running in the parent process.
  bool hasChromeParent = !XRE_IsContentProcess();
  if (aParent) {
    // Check if the parent document has chrome privileges.
    hasChromeParent = parentDoc && nsContentUtils::IsChromeDoc(parentDoc);
  }

  bool isCallerChrome = nsContentUtils::LegacyIsCallerChromeOrNativeCode();

  // try to find an extant browsing context with the given name
  if (!name.IsEmpty() &&
      (!aForceNoOpener || nsContentUtils::IsSpecialName(name))) {
    if (parentInnerWin && parentInnerWin->GetWindowGlobalChild()) {
      // If we have a parent window, perform the look-up relative to the parent
      // inner window.
      targetBC =
          parentInnerWin->GetWindowGlobalChild()->FindBrowsingContextWithName(
              name);
    } else if (hasChromeParent && isCallerChrome &&
               !nsContentUtils::IsSpecialName(name)) {
      // Otherwise, if this call is from chrome, perform the lookup relative
      // to the system group.
      nsCOMPtr<mozIDOMWindowProxy> chromeWindow;
      MOZ_ALWAYS_SUCCEEDS(GetWindowByName(name, getter_AddRefs(chromeWindow)));
      if (chromeWindow) {
        targetBC = nsPIDOMWindowOuter::From(chromeWindow)->GetBrowsingContext();
      }
    }
  }

  // Do sandbox checks here, instead of waiting until nsIDocShell::LoadURI.
  // The state of the window can change before this call and if we are blocked
  // because of sandboxing, we wouldn't want that to happen.
  if (parentBC && parentBC->IsSandboxedFrom(targetBC)) {
    return NS_ERROR_DOM_INVALID_ACCESS_ERR;
  }

  // If our target BrowsingContext is still pending initialization, ignore the
  // navigation request targeting it.
  if (targetBC && NS_WARN_IF(targetBC->GetPendingInitialization())) {
    return NS_ERROR_ABORT;
  }

  // no extant window? make a new one.

  CSSToDesktopScale cssToDesktopScale(1.0);
  if (nsCOMPtr<nsIBaseWindow> win = do_QueryInterface(parentDocShell)) {
    cssToDesktopScale = win->GetUnscaledCSSToDesktopScale();
  }
  SizeSpec sizeSpec =
      CalcSizeSpec(features, hasChromeParent, cssToDesktopScale);
  sizeSpec.ScaleBy(parentBC ? parentBC->FullZoom() : 1.0f);

  bool isPopupRequested = false;

  // Make sure we calculate the chromeFlags *before* we push the
  // callee context onto the context stack so that
  // the calculation sees the actual caller when doing its
  // security checks.
  if (hasChromeParent && isCallerChrome && XRE_IsParentProcess()) {
    chromeFlags =
        CalculateChromeFlagsForSystem(features, aDialog, uriToLoadIsChrome);
  } else {
    MOZ_DIAGNOSTIC_ASSERT(parentBC && parentBC->IsContent(),
                          "content caller must provide content parent");
    chromeFlags =
        CalculateChromeFlagsForContent(features, aModifiers, &isPopupRequested);

    if (aDialog) {
      MOZ_ASSERT(XRE_IsParentProcess());
      chromeFlags |= nsIWebBrowserChrome::CHROME_OPENAS_DIALOG;
    }
  }

  bool windowTypeIsChrome =
      chromeFlags & nsIWebBrowserChrome::CHROME_OPENAS_CHROME;

  if (parentBC && !aForceNoOpener) {
    if (parentBC->IsChrome() && !windowTypeIsChrome) {
      NS_WARNING(
          "Content windows may never have chrome windows as their openers.");
      return NS_ERROR_INVALID_ARG;
    }
    if (parentBC->IsContent() && windowTypeIsChrome) {
      NS_WARNING(
          "Chrome windows may never have content windows as their openers.");
      return NS_ERROR_INVALID_ARG;
    }
  }

  // If we're opening a content window from a content window, we need to exactly
  // inherit fission and e10s status flags from parentBC. Only new toplevel
  // windows may change these options.
  if (parentBC && parentBC->IsContent() && !windowTypeIsChrome) {
    chromeFlags &= ~(nsIWebBrowserChrome::CHROME_REMOTE_WINDOW |
                     nsIWebBrowserChrome::CHROME_FISSION_WINDOW);
    if (parentBC->UseRemoteTabs()) {
      chromeFlags |= nsIWebBrowserChrome::CHROME_REMOTE_WINDOW;
    }
    if (parentBC->UseRemoteSubframes()) {
      chromeFlags |= nsIWebBrowserChrome::CHROME_FISSION_WINDOW;
    }
  }

  // XXXbz Why is an AutoJSAPI good enough here?  Wouldn't AutoEntryScript (so
  // we affect the entry global) make more sense?  Or do we just want to affect
  // GetSubjectPrincipal()?
  dom::AutoJSAPI jsapiChromeGuard;

  if (isCallerChrome && !hasChromeParent && !windowTypeIsChrome) {
    // open() is called from chrome on a non-chrome window, initialize an
    // AutoJSAPI with the callee to prevent the caller's privileges from leaking
    // into code that runs while opening the new window.
    //
    // The reasoning for this is in bug 289204. Basically, chrome sometimes does
    // someContentWindow.open(untrustedURL), and wants to be insulated from
    // nasty javascript: URLs and such. But there are also cases where we create
    // a window parented to a content window (such as a download dialog),
    // usually directly with nsIWindowWatcher. In those cases, we want the
    // principal of the initial about:blank document to be system, so that the
    // subsequent XUL load can reuse the inner window and avoid blowing away
    // expandos. As such, we decide whether to load with the principal of the
    // caller or of the parent based on whether the docshell type is chrome or
    // content.

    nsCOMPtr<nsIGlobalObject> parentGlobalObject = do_QueryInterface(aParent);
    if (!aParent) {
      jsapiChromeGuard.Init();
    } else if (NS_WARN_IF(!jsapiChromeGuard.Init(parentGlobalObject))) {
      return NS_ERROR_UNEXPECTED;
    }
  }

  // Now that the jsapiChromeGuard has been set, fetch the system principal
  // potentially configured by it. We want to make sure to respect any principal
  // changes imposed by that guard throughout this function.
  //
  // Note: The check for the current JSContext isn't necessarily sensical.
  // It's just designed to preserve old semantics during a mass-conversion
  // patch.
  // Bug 1498605 verify usages of systemPrincipal here
  JSContext* cx = nsContentUtils::GetCurrentJSContext();
  nsCOMPtr<nsIPrincipal> subjectPrincipal =
      cx ? nsContentUtils::SubjectPrincipal()
         : nsContentUtils::GetSystemPrincipal();
  MOZ_ASSERT(subjectPrincipal);

  nsCOMPtr<nsIPrincipal> newWindowPrincipal;
  if (!targetBC) {
    if (windowTypeIsChrome) {
      // If we are creating a chrome window, we must be called with a system
      // principal, and should inherit that for the new chrome window.
      MOZ_RELEASE_ASSERT(subjectPrincipal->IsSystemPrincipal(),
                         "Only system principals can create chrome windows");
      newWindowPrincipal = subjectPrincipal;
    } else if (nsContentUtils::IsSystemOrExpandedPrincipal(subjectPrincipal)) {
      // Don't allow initial about:blank documents to inherit a system or
      // expanded principal, instead replace it with a null principal. We can't
      // inherit origin attributes from the system principal, so use the parent
      // BC if it's available.
      if (parentBC) {
        newWindowPrincipal =
            NullPrincipal::Create(parentBC->OriginAttributesRef());
      } else {
        newWindowPrincipal = NullPrincipal::CreateWithoutOriginAttributes();
      }
    } else if (aForceNoOpener) {
      // If we're opening a new window with noopener, create a new opaque
      // principal for the new window, rather than re-using the existing
      // principal.
      newWindowPrincipal =
          NullPrincipal::CreateWithInheritedAttributes(subjectPrincipal);
    } else {
      // Finally, if there's an opener relationship and it's not a special
      // principal, we should inherit that principal for the new window.
      newWindowPrincipal = subjectPrincipal;
    }
  }

  // Information used when opening new content windows. This object will be
  // passed through to the inner nsFrameLoader.
  RefPtr<nsOpenWindowInfo> openWindowInfo;
  if (!targetBC && !windowTypeIsChrome) {
    openWindowInfo = new nsOpenWindowInfo();
    openWindowInfo->mForceNoOpener = aForceNoOpener;
    openWindowInfo->mParent = parentBC;
    openWindowInfo->mIsForPrinting = aPrintKind != PRINT_NONE;
    openWindowInfo->mIsForWindowDotPrint = aPrintKind == PRINT_WINDOW_DOT_PRINT;

    // We're going to want the window to be immediately available, meaning we
    // want it to match the current remoteness.
    openWindowInfo->mIsRemote = XRE_IsContentProcess();

    // Inherit our OriginAttributes from the computed new window principal.
    MOZ_ASSERT(
        newWindowPrincipal &&
        !nsContentUtils::IsSystemOrExpandedPrincipal(newWindowPrincipal));
    openWindowInfo->mOriginAttributes =
        newWindowPrincipal->OriginAttributesRef();

    MOZ_DIAGNOSTIC_ASSERT(
        !parentBC || openWindowInfo->mOriginAttributes.EqualsIgnoringFPD(
                         parentBC->OriginAttributesRef()),
        "subject principal origin attributes doesn't match opener");
  }

  uint32_t activeDocsSandboxFlags = 0;
  nsCOMPtr<nsIContentSecurityPolicy> cspToInheritForAboutBlank;
  Maybe<nsILoadInfo::CrossOriginEmbedderPolicy> coepToInheritForAboutBlank;
  if (!targetBC) {
    // We're going to either open up a new window ourselves or ask a
    // nsIWindowProvider for one.  In either case, we'll want to set the right
    // name on it.
    windowNeedsName = true;

    // If the parent trying to open a new window is sandboxed
    // without 'allow-popups', this is not allowed and we fail here.
    if (parentDoc) {
      // Save sandbox flags for copying to new browsing context (docShell).
      activeDocsSandboxFlags = parentDoc->GetSandboxFlags();

      if (!aForceNoOpener) {
        cspToInheritForAboutBlank = parentDoc->GetCsp();
        coepToInheritForAboutBlank = parentDoc->GetEmbedderPolicy();
      }

      // Check to see if this frame is allowed to navigate, but don't check if
      // we're printing, as that's not a real navigation.
      if (aPrintKind == PRINT_NONE &&
          (activeDocsSandboxFlags & SANDBOXED_AUXILIARY_NAVIGATION)) {
        return NS_ERROR_DOM_INVALID_ACCESS_ERR;
      }
    }

    // Now check whether it's ok to ask a window provider for a window.  Don't
    // do it if we're opening a dialog or if our parent is a chrome window or
    // if we're opening something that has modal, dialog, or chrome flags set.
    if (parentTreeOwner && !aDialog && parentBC->IsContent() &&
        !(chromeFlags & (nsIWebBrowserChrome::CHROME_MODAL |
                         nsIWebBrowserChrome::CHROME_OPENAS_DIALOG |
                         nsIWebBrowserChrome::CHROME_OPENAS_CHROME))) {
      MOZ_ASSERT(openWindowInfo);

      nsCOMPtr<nsIWindowProvider> provider = do_GetInterface(parentTreeOwner);
      if (provider) {
        rv = provider->ProvideWindow(openWindowInfo, chromeFlags, aCalledFromJS,
                                     uriToLoad, name, featuresStr, aModifiers,
                                     aForceNoOpener, aForceNoReferrer,
                                     isPopupRequested, aLoadState, &windowIsNew,
                                     getter_AddRefs(targetBC));

        if (NS_SUCCEEDED(rv) && targetBC) {
          nsCOMPtr<nsIDocShell> newDocShell = targetBC->GetDocShell();

          // If this is a new window, but it's incompatible with the current
          // userContextId, we ignore it and we pretend that nothing has been
          // returned by ProvideWindow.
          if (!windowIsNew && newDocShell) {
            if (!CheckUserContextCompatibility(newDocShell)) {
              targetBC = nullptr;
              windowIsNew = false;
            }
          }

        } else if (rv == NS_ERROR_ABORT) {
          // NS_ERROR_ABORT means the window provider has flat-out rejected
          // the open-window call and we should bail.  Don't return an error
          // here, because our caller may propagate that error, which might
          // cause e.g. window.open to throw!  Just return null for our out
          // param.
          return NS_OK;
        }
      }
    }
  }

  bool newWindowShouldBeModal = false;
  bool parentIsModal = false;
  if (!targetBC) {
    if (XRE_IsContentProcess()) {
      // If our window provider failed to provide a window in the content
      // process, we cannot recover. Reject the window open request and bail.
      return NS_OK;
    }

    windowIsNew = true;
    isNewToplevelWindow = true;

    nsCOMPtr<nsIWebBrowserChrome> parentChrome(
        do_GetInterface(parentTreeOwner));

    // is the parent (if any) modal? if so, we must be, too.
    bool weAreModal = (chromeFlags & nsIWebBrowserChrome::CHROME_MODAL) != 0;
    newWindowShouldBeModal = weAreModal;
    if (!weAreModal && parentChrome) {
      parentChrome->IsWindowModal(&weAreModal);
      parentIsModal = weAreModal;
    }

    if (weAreModal) {
      windowIsModal = true;
      // in case we added this because weAreModal
      chromeFlags |= nsIWebBrowserChrome::CHROME_MODAL |
                     nsIWebBrowserChrome::CHROME_DEPENDENT;
    }

    // Make sure to not create modal windows if our parent is invisible and
    // isn't a chrome window.  Otherwise we can end up in a bizarre situation
    // where we can't shut down because an invisible window is open.  If
    // someone tries to do this, throw.
    if (!hasChromeParent && (chromeFlags & nsIWebBrowserChrome::CHROME_MODAL)) {
      nsCOMPtr<nsIBaseWindow> parentWindow(do_GetInterface(parentTreeOwner));
      nsCOMPtr<nsIWidget> parentWidget;
      if (parentWindow) {
        parentWindow->GetMainWidget(getter_AddRefs(parentWidget));
      }
      // NOTE: the logic for this visibility check is duplicated in
      // nsIDOMWindowUtils::isParentWindowMainWidgetVisible - if we change
      // how a window is determined "visible" in this context then we should
      // also adjust that attribute and/or any consumers of it...
      if (parentWidget && !parentWidget->IsVisible()) {
        return NS_ERROR_NOT_AVAILABLE;
      }
    }

    NS_ASSERTION(mWindowCreator,
                 "attempted to open a new window with no WindowCreator");
    rv = NS_ERROR_FAILURE;
    if (mWindowCreator) {
      nsCOMPtr<nsIWebBrowserChrome> newChrome;

      nsCOMPtr<nsPIDOMWindowInner> parentTopInnerWindow;
      if (parentOuterWin) {
        nsCOMPtr<nsPIDOMWindowOuter> parentTopWindow =
            parentOuterWin->GetInProcessTop();
        if (parentTopWindow) {
          parentTopInnerWindow = parentTopWindow->GetCurrentInnerWindow();
        }
      }

      if (parentTopInnerWindow) {
        parentTopInnerWindow->Suspend();
      }

      /* We can give the window creator some hints. The only hint at this time
         is whether the opening window is in a situation that's likely to mean
         this is an unrequested popup window we're creating. However we're not
         completely honest: we clear that indicator if the opener is chrome, so
         that the downstream consumer can treat the indicator to mean simply
         that the new window is subject to popup control. */
      rv = CreateChromeWindow(parentChrome, chromeFlags, openWindowInfo,
                              getter_AddRefs(newChrome));
      if (parentTopInnerWindow) {
        parentTopInnerWindow->Resume();
      }

      if (newChrome) {
        /* It might be a chrome AppWindow, in which case it won't have
            an nsIDOMWindow (primary content shell). But in that case, it'll
            be able to hand over an nsIDocShellTreeItem directly. */
        nsCOMPtr<nsPIDOMWindowOuter> newWindow(do_GetInterface(newChrome));
        nsCOMPtr<nsIDocShellTreeItem> newDocShellItem;
        if (newWindow) {
          newDocShellItem = newWindow->GetDocShell();
        }
        if (!newDocShellItem) {
          newDocShellItem = do_GetInterface(newChrome);
        }
        if (!newDocShellItem) {
          rv = NS_ERROR_FAILURE;
        }
        targetBC = newDocShellItem->GetBrowsingContext();
      }
    }
  }

  // better have a window to use by this point
  if (!targetBC) {
    return rv;
  }

  // If our parent is sandboxed, set it as the one permitted sandboxed navigator
  // on the new window we're opening.
  if (activeDocsSandboxFlags && parentBC) {
    MOZ_ALWAYS_SUCCEEDS(targetBC->SetOnePermittedSandboxedNavigator(parentBC));
  }

  if (!aForceNoOpener && parentBC) {
    // If we've created a new content window, its opener should have been set
    // when its BrowsingContext was created, in order to ensure that the context
    // is loaded within the correct BrowsingContextGroup.
    if (windowIsNew && targetBC->IsContent()) {
      if (parentBC->IsDiscarded()) {
        // If the parent BC was discarded in a nested event loop before we got
        // to this point, we can't set it as the opener. Ideally we would still
        // set `HadOriginalOpener()` in that case, but that's somewhat
        // nontrivial, and not worth the effort given the nature of the corner
        // case (see comment in `nsFrameLoader::CreateBrowsingContext`.
        MOZ_RELEASE_ASSERT(targetBC->GetOpenerId() == parentBC->Id() ||
                           targetBC->GetOpenerId() == 0);
      } else {
        MOZ_RELEASE_ASSERT(targetBC->GetOpenerId() == parentBC->Id());
        MOZ_RELEASE_ASSERT(targetBC->HadOriginalOpener());
      }
    } else {
      // Update the opener for an existing or chrome BC.
      targetBC->SetOpener(parentBC);
    }
  }

  RefPtr<nsDocShell> targetDocShell(nsDocShell::Cast(targetBC->GetDocShell()));

  // As required by spec, new windows always start out same-process, even if the
  // URL being loaded will eventually load in a new process.
  MOZ_DIAGNOSTIC_ASSERT(!windowIsNew || targetDocShell);
  // New top-level windows are only opened in the parent process and are, by
  // definition, always in-process.
  MOZ_DIAGNOSTIC_ASSERT(!isNewToplevelWindow || targetDocShell);

  // Copy sandbox flags to the new window if activeDocsSandboxFlags says to do
  // so.  Note that it's only nonzero if the window is new, so clobbering
  // sandbox flags on the window makes sense in that case.
  if (activeDocsSandboxFlags &
      SANDBOX_PROPAGATES_TO_AUXILIARY_BROWSING_CONTEXTS) {
    MOZ_ASSERT(windowIsNew, "Should only get here for new windows");
    MOZ_ALWAYS_SUCCEEDS(targetBC->SetSandboxFlags(activeDocsSandboxFlags));
    MOZ_ALWAYS_SUCCEEDS(
        targetBC->SetInitialSandboxFlags(targetBC->GetSandboxFlags()));
  }

  RefPtr<nsGlobalWindowOuter> targetOuterWin(
      nsGlobalWindowOuter::Cast(targetBC->GetDOMWindow()));
#ifdef DEBUG
  if (targetOuterWin && windowIsNew) {
    // Assert that we're not loading things right now.  If we are, when
    // that load completes it will clobber whatever principals we set up
    // on this new window!
    nsCOMPtr<nsIChannel> chan;
    targetDocShell->GetDocumentChannel(getter_AddRefs(chan));
    MOZ_ASSERT(!chan, "Why is there a document channel?");

    if (RefPtr<Document> doc = targetOuterWin->GetExtantDoc()) {
      MOZ_ASSERT(doc->IsInitialDocument(),
                 "New window's document should be an initial document");
    }
  }
#endif

  MOZ_ASSERT(targetOuterWin || !windowIsNew,
             "New windows are always created in-process");

  *aResult = do_AddRef(targetBC).take();

  if (isNewToplevelWindow) {
    nsCOMPtr<nsIDocShellTreeOwner> newTreeOwner;
    targetDocShell->GetTreeOwner(getter_AddRefs(newTreeOwner));
    MaybeDisablePersistence(sizeSpec, newTreeOwner);
  }

  if (aDialog && aArgv) {
    MOZ_ASSERT(targetOuterWin);
    NS_ENSURE_TRUE(targetOuterWin, NS_ERROR_UNEXPECTED);

    // Set the args on the new window.
    MOZ_TRY(targetOuterWin->SetArguments(aArgv));
  }

  /* allow a window that we found by name to keep its name (important for cases
     like _self where the given name is different (and invalid)).  Also, _blank
     is not a window name. */
  if (windowNeedsName) {
    if (nameSpecified && !name.LowerCaseEqualsLiteral("_blank")) {
      MOZ_ALWAYS_SUCCEEDS(targetBC->SetName(name));
    } else {
      MOZ_ALWAYS_SUCCEEDS(targetBC->SetName(u""_ns));
    }
  }

  // Now we have to set the right opener principal on the new window.  Note
  // that we have to do this _before_ starting any URI loads, thanks to the
  // sync nature of javascript: loads.

  if (windowIsNew) {
    MOZ_DIAGNOSTIC_ASSERT(
        !targetBC->IsContent() ||
        newWindowPrincipal->OriginAttributesRef().EqualsIgnoringFPD(
            targetBC->OriginAttributesRef()));

    bool autoPrivateBrowsing = StaticPrefs::browser_privatebrowsing_autostart();

    if (!autoPrivateBrowsing &&
        (chromeFlags & nsIWebBrowserChrome::CHROME_NON_PRIVATE_WINDOW)) {
      if (targetBC->IsChrome()) {
        targetBC->SetUsePrivateBrowsing(false);
      }
      MOZ_DIAGNOSTIC_ASSERT(
          !targetBC->UsePrivateBrowsing(),
          "CHROME_NON_PRIVATE_WINDOW passed, but got private window");
    } else if (autoPrivateBrowsing ||
               (chromeFlags & nsIWebBrowserChrome::CHROME_PRIVATE_WINDOW)) {
      if (targetBC->IsChrome()) {
        targetBC->SetUsePrivateBrowsing(true);
      }
      MOZ_DIAGNOSTIC_ASSERT(
          targetBC->UsePrivateBrowsing(),
          "CHROME_PRIVATE_WINDOW passed, but got non-private window");
    }

    // Now set the opener principal on the new window.  Note that we need to do
    // this no matter whether we were opened from JS; if there is nothing on
    // the JS stack, just use the principal of our parent window.  In those
    // cases we do _not_ set the parent window principal as the owner of the
    // load--since we really don't know who the owner is, just leave it null.
    NS_ASSERTION(targetOuterWin == targetDocShell->GetWindow(),
                 "Different windows??");

    // Initialize the principal of the initial about:blank document. For
    // toplevel windows, this call may have already happened when the window was
    // created, but SetInitialPrincipal is safe to call multiple times.
    if (targetOuterWin) {
      MOZ_ASSERT(windowIsNew);
      MOZ_ASSERT(!targetOuterWin->GetSameProcessOpener() ||
                 targetOuterWin->GetSameProcessOpener() == aParent);
      targetOuterWin->SetInitialPrincipal(newWindowPrincipal,
                                          cspToInheritForAboutBlank,
                                          coepToInheritForAboutBlank);

      if (aIsPopupSpam) {
        MOZ_ASSERT(!targetBC->GetIsPopupSpam(),
                   "Who marked it as popup spam already???");
        // Make sure we don't mess up our counter even if the above assert
        // fails.
        if (!targetBC->GetIsPopupSpam()) {
          MOZ_ALWAYS_SUCCEEDS(targetBC->SetIsPopupSpam(true));
        }
      }
    }

    // Copy the current session storage for the current domain. Don't perform
    // the copy if we're forcing noopener, however.
    if (!aForceNoOpener && subjectPrincipal && parentDocShell &&
        targetDocShell) {
      const RefPtr<SessionStorageManager> parentStorageManager =
          parentDocShell->GetBrowsingContext()->GetSessionStorageManager();
      const RefPtr<SessionStorageManager> newStorageManager =
          targetDocShell->GetBrowsingContext()->GetSessionStorageManager();

      if (parentStorageManager && newStorageManager) {
        RefPtr<Storage> storage;
        parentStorageManager->GetStorage(
            parentInnerWin, subjectPrincipal, subjectPrincipal,
            targetBC->UsePrivateBrowsing(), getter_AddRefs(storage));
        if (storage) {
          newStorageManager->CloneStorage(storage);
        }
      }
    }
  }

  // We rely on CalculateChromeFlags to decide whether remote (out-of-process)
  // tabs should be used.
  MOZ_DIAGNOSTIC_ASSERT(
      targetBC->UseRemoteTabs() ==
      !!(chromeFlags & nsIWebBrowserChrome::CHROME_REMOTE_WINDOW));
  MOZ_DIAGNOSTIC_ASSERT(
      targetBC->UseRemoteSubframes() ==
      !!(chromeFlags & nsIWebBrowserChrome::CHROME_FISSION_WINDOW));

  RefPtr<nsDocShellLoadState> loadState = aLoadState;
  if (uriToLoad && loadState) {
    // If a URI was passed to this function, open that, not what was passed in
    // the original LoadState. See Bug 1515433.
    loadState->SetURI(uriToLoad);
  } else if (uriToLoad && aNavigate && !loadState) {
    RefPtr<WindowContext> context =
        parentInnerWin ? parentInnerWin->GetWindowContext() : nullptr;
    loadState = new nsDocShellLoadState(uriToLoad);

    loadState->SetSourceBrowsingContext(parentBC);
    loadState->SetAllowFocusMove(true);
    loadState->SetHasValidUserGestureActivation(
        context && context->HasValidTransientUserGestureActivation());
    if (parentBC) {
      loadState->SetTriggeringSandboxFlags(parentBC->GetSandboxFlags());
    }

    if (parentInnerWin) {
      loadState->SetTriggeringWindowId(parentInnerWin->WindowID());
      loadState->SetTriggeringStorageAccess(
          parentInnerWin->UsingStorageAccess());
    }

    if (subjectPrincipal) {
      loadState->SetTriggeringPrincipal(subjectPrincipal);
    }
#ifndef ANDROID
    MOZ_ASSERT(subjectPrincipal,
               "nsWindowWatcher: triggeringPrincipal required");
#endif

    if (!aForceNoReferrer) {
      /* use the URL from the *extant* document, if any. The usual accessor
         GetDocument will synchronously create an about:blank document if
         it has no better answer, and we only care about a real document.
         Also using GetDocument to force document creation seems to
         screw up focus in the hidden window; see bug 36016.
      */
      RefPtr<Document> doc = GetEntryDocument();
      if (!doc) {
        doc = parentDoc;
      }
      if (doc) {
        auto referrerInfo = MakeRefPtr<ReferrerInfo>(*doc);
        loadState->SetReferrerInfo(referrerInfo);
      }
    }
  }

  if (loadState && cx) {
    nsGlobalWindowInner* win = xpc::CurrentWindowOrNull(cx);
    if (win) {
      nsCOMPtr<nsIContentSecurityPolicy> csp = win->GetCsp();
      loadState->SetCsp(csp);
    }
  }

  if (isNewToplevelWindow) {
    // Notify observers that the window is open and ready.
    // The window has not yet started to load a document.
    nsCOMPtr<nsIObserverService> obsSvc =
        mozilla::services::GetObserverService();
    if (obsSvc) {
      obsSvc->NotifyObservers(ToSupports(targetOuterWin),
                              "toplevel-window-ready", nullptr);
    }
  }

  // Before loading the URI we want to be 100% sure that we use the correct
  // userContextId.
  MOZ_ASSERT_IF(targetDocShell, CheckUserContextCompatibility(targetDocShell));

  // If this tab or window has been opened by a window.open call, we have to
  // provide all the data needed to send a
  // webNavigation.onCreatedNavigationTarget event.
  if (parentDocShell && windowIsNew) {
    nsCOMPtr<nsIObserverService> obsSvc =
        mozilla::services::GetObserverService();

    if (obsSvc) {
      RefPtr<nsHashPropertyBag> props = new nsHashPropertyBag();

      if (uriToLoad) {
        // The url notified in the webNavigation.onCreatedNavigationTarget
        // event.
        props->SetPropertyAsACString(u"url"_ns, uriToLoad->GetSpecOrDefault());
      }

      props->SetPropertyAsInterface(u"sourceTabDocShell"_ns, parentDocShell);
      props->SetPropertyAsInterface(u"createdTabDocShell"_ns,
                                    ToSupports(targetDocShell));

      obsSvc->NotifyObservers(static_cast<nsIPropertyBag2*>(props),
                              "webNavigation-createdNavigationTarget-from-js",
                              nullptr);
    }
  }

  if (uriToLoad && aNavigate) {
    uint32_t loadFlags = nsIWebNavigation::LOAD_FLAGS_NONE;
    if (windowIsNew) {
      loadFlags |= nsIWebNavigation::LOAD_FLAGS_FIRST_LOAD;

      // Per spec, the explicit navigation to about:blank after the initial
      // about:blank document in a new window does not occur, so there is no
      // opportunity for it to inherit the source document's principal. This
      // doesn't perfectly model this, as a noopener creation of `about:blank`
      // will replace the global due to a principal mismatch, but it should be
      // unobservable (bug 1694993).
      // This isn't set for chrome windows, as an about:blank chrome document
      // needs to inherit its principal from its opener.
      if (aForceNoOpener && !windowTypeIsChrome) {
        loadFlags |= nsIWebNavigation::LOAD_FLAGS_DISALLOW_INHERIT_PRINCIPAL;
      }
    }
    loadState->SetLoadFlags(loadFlags);
    loadState->SetFirstParty(true);

    // Should this pay attention to errors returned by LoadURI?
    targetBC->LoadURI(loadState);
  }

  if (isNewToplevelWindow) {
    nsCOMPtr<nsIDocShellTreeOwner> newTreeOwner;
    targetDocShell->GetTreeOwner(getter_AddRefs(newTreeOwner));
    SizeOpenedWindow(newTreeOwner, aParent, isCallerChrome, sizeSpec);
  }

  if (windowIsModal) {
    NS_ENSURE_TRUE(targetDocShell, NS_ERROR_NOT_IMPLEMENTED);

    nsCOMPtr<nsIDocShellTreeOwner> newTreeOwner;
    targetDocShell->GetTreeOwner(getter_AddRefs(newTreeOwner));
    nsCOMPtr<nsIWebBrowserChrome> newChrome(do_GetInterface(newTreeOwner));

    // Throw an exception here if no web browser chrome is available,
    // we need that to show a modal window.
    NS_ENSURE_TRUE(newChrome, NS_ERROR_NOT_AVAILABLE);

    // Dispatch dialog events etc, but we only want to do that if
    // we're opening a modal content window (the helper classes are
    // no-ops if given no window), for chrome dialogs we don't want to
    // do any of that (it's done elsewhere for us).
    // Make sure we maintain the state on an outer window, because
    // that's where it lives; inner windows assert if you try to
    // maintain the state on them.
    nsAutoWindowStateHelper windowStateHelper(parentOuterWin);

    if (!windowStateHelper.DefaultEnabled()) {
      // Default to cancel not opening the modal window.
      NS_RELEASE(*aResult);

      return NS_OK;
    }

    bool isAppModal = false;
    nsCOMPtr<nsIBaseWindow> parentWindow(do_GetInterface(newTreeOwner));
    nsCOMPtr<nsIWidget> parentWidget;
    if (parentWindow) {
      parentWindow->GetMainWidget(getter_AddRefs(parentWidget));
      if (parentWidget) {
        isAppModal = parentWidget->IsRunningAppModal();
      }
    }
    if (parentWidget &&
        ((!newWindowShouldBeModal && parentIsModal) || isAppModal)) {
      parentWidget->SetModal(true);
    } else {
      // Reset popup state while opening a modal dialog, and firing
      // events about the dialog, to prevent the current state from
      // being active the whole time a modal dialog is open.
      AutoPopupStatePusher popupStatePusher(PopupBlocker::openAbused);

      auto rv = newChrome->ShowAsModal();
      NS_ENSURE_SUCCESS(rv, rv);
    }
  }
  // If a website opens a popup exit DOM fullscreen
  if (StaticPrefs::full_screen_api_exit_on_windowOpen() && aCalledFromJS &&
      !hasChromeParent && !isCallerChrome && parentOuterWin) {
    Document::AsyncExitFullscreen(parentOuterWin->GetDoc());
  }

  if (aForceNoOpener && windowIsNew) {
    NS_RELEASE(*aResult);
  }

  return NS_OK;
}

NS_IMETHODIMP
nsWindowWatcher::RegisterNotification(nsIObserver* aObserver) {
  // just a convenience method; it delegates to nsIObserverService

  if (!aObserver) {
    return NS_ERROR_INVALID_ARG;
  }

  nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
  if (!os) {
    return NS_ERROR_FAILURE;
  }

  nsresult rv = os->AddObserver(aObserver, "domwindowopened", false);
  if (NS_SUCCEEDED(rv)) {
    rv = os->AddObserver(aObserver, "domwindowclosed", false);
  }

  return rv;
}

NS_IMETHODIMP
nsWindowWatcher::UnregisterNotification(nsIObserver* aObserver) {
  // just a convenience method; it delegates to nsIObserverService

  if (!aObserver) {
    return NS_ERROR_INVALID_ARG;
  }

  nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
  if (!os) {
    return NS_ERROR_FAILURE;
  }

  os->RemoveObserver(aObserver, "domwindowopened");
  os->RemoveObserver(aObserver, "domwindowclosed");

  return NS_OK;
}

NS_IMETHODIMP
nsWindowWatcher::GetWindowEnumerator(nsISimpleEnumerator** aResult) {
  if (!aResult) {
    return NS_ERROR_INVALID_ARG;
  }

  MutexAutoLock lock(mListLock);
  RefPtr<nsWatcherWindowEnumerator> enumerator =
      new nsWatcherWindowEnumerator(this);
  enumerator.forget(aResult);
  return NS_OK;
}

NS_IMETHODIMP
nsWindowWatcher::GetNewPrompter(mozIDOMWindowProxy* aParent,
                                nsIPrompt** aResult) {
  // This is for backwards compat only. Callers should just use the prompt
  // service directly.
  nsresult rv;
  nsCOMPtr<nsIPromptFactory> factory =
      do_GetService("@mozilla.org/prompter;1", &rv);
  NS_ENSURE_SUCCESS(rv, rv);
  return factory->GetPrompt(aParent, NS_GET_IID(nsIPrompt),
                            reinterpret_cast<void**>(aResult));
}

NS_IMETHODIMP
nsWindowWatcher::GetNewAuthPrompter(mozIDOMWindowProxy* aParent,
                                    nsIAuthPrompt** aResult) {
  // This is for backwards compat only. Callers should just use the prompt
  // service directly.
  nsresult rv;
  nsCOMPtr<nsIPromptFactory> factory =
      do_GetService("@mozilla.org/prompter;1", &rv);
  NS_ENSURE_SUCCESS(rv, rv);
  return factory->GetPrompt(aParent, NS_GET_IID(nsIAuthPrompt),
                            reinterpret_cast<void**>(aResult));
}

NS_IMETHODIMP
nsWindowWatcher::GetPrompt(mozIDOMWindowProxy* aParent, const nsIID& aIID,
                           void** aResult) {
  // This is for backwards compat only. Callers should just use the prompt
  // service directly.
  nsresult rv;
  nsCOMPtr<nsIPromptFactory> factory =
      do_GetService("@mozilla.org/prompter;1", &rv);
  NS_ENSURE_SUCCESS(rv, rv);
  rv = factory->GetPrompt(aParent, aIID, aResult);

  // Allow for an embedding implementation to not support nsIAuthPrompt2.
  if (rv == NS_NOINTERFACE && aIID.Equals(NS_GET_IID(nsIAuthPrompt2))) {
    nsCOMPtr<nsIAuthPrompt> oldPrompt;
    rv = factory->GetPrompt(aParent, NS_GET_IID(nsIAuthPrompt),
                            getter_AddRefs(oldPrompt));
    NS_ENSURE_SUCCESS(rv, rv);

    NS_WrapAuthPrompt(oldPrompt, reinterpret_cast<nsIAuthPrompt2**>(aResult));
    if (!*aResult) {
      rv = NS_ERROR_NOT_AVAILABLE;
    }
  }
  return rv;
}

NS_IMETHODIMP
nsWindowWatcher::SetWindowCreator(nsIWindowCreator* aCreator) {
  mWindowCreator = aCreator;
  return NS_OK;
}

NS_IMETHODIMP
nsWindowWatcher::HasWindowCreator(bool* aResult) {
  *aResult = mWindowCreator;
  return NS_OK;
}

NS_IMETHODIMP
nsWindowWatcher::GetActiveWindow(mozIDOMWindowProxy** aActiveWindow) {
  *aActiveWindow = nullptr;
  nsFocusManager* fm = nsFocusManager::GetFocusManager();
  if (fm) {
    return fm->GetActiveWindow(aActiveWindow);
  }
  return NS_OK;
}

NS_IMETHODIMP
nsWindowWatcher::AddWindow(mozIDOMWindowProxy* aWindow,
                           nsIWebBrowserChrome* aChrome) {
  if (!aWindow) {
    return NS_ERROR_INVALID_ARG;
  }

  {
    nsWatcherWindowEntry* info;
    MutexAutoLock lock(mListLock);

    // if we already have an entry for this window, adjust
    // its chrome mapping and return
    info = FindWindowEntry(aWindow);
    if (info) {
      nsCOMPtr<nsISupportsWeakReference> supportsweak(
          do_QueryInterface(aChrome));
      if (supportsweak) {
        supportsweak->GetWeakReference(getter_AddRefs(info->mChromeWeak));
      } else {
        info->mChrome = aChrome;
        info->mChromeWeak = nullptr;
      }
      return NS_OK;
    }

    // create a window info struct and add it to the list of windows
    info = new nsWatcherWindowEntry(aWindow, aChrome);
    if (!info) {
      return NS_ERROR_OUT_OF_MEMORY;
    }

    if (mOldestWindow) {
      info->InsertAfter(mOldestWindow->mOlder);
    } else {
      mOldestWindow = info;
    }
  }  // leave the mListLock

  // a window being added to us signifies a newly opened window.
  // send notifications.
  nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
  if (!os) {
    return NS_ERROR_FAILURE;
  }

  nsCOMPtr<nsISupports> domwin(do_QueryInterface(aWindow));
  return os->NotifyObservers(domwin, "domwindowopened", nullptr);
}

NS_IMETHODIMP
nsWindowWatcher::RemoveWindow(mozIDOMWindowProxy* aWindow) {
  // find the corresponding nsWatcherWindowEntry, remove it

  if (!aWindow) {
    return NS_ERROR_INVALID_ARG;
  }

  nsWatcherWindowEntry* info = FindWindowEntry(aWindow);
  if (info) {
    RemoveWindow(info);
    return NS_OK;
  }
  NS_WARNING("requested removal of nonexistent window");
  return NS_ERROR_INVALID_ARG;
}

nsWatcherWindowEntry* nsWindowWatcher::FindWindowEntry(
    mozIDOMWindowProxy* aWindow) {
  // find the corresponding nsWatcherWindowEntry
  nsWatcherWindowEntry* info;
  nsWatcherWindowEntry* listEnd;

  info = mOldestWindow;
  listEnd = nullptr;
  while (info != listEnd) {
    if (info->mWindow == aWindow) {
      return info;
    }
    info = info->mYounger;
    listEnd = mOldestWindow;
  }
  return nullptr;
}

nsresult nsWindowWatcher::RemoveWindow(nsWatcherWindowEntry* aInfo) {
  uint32_t count = mEnumeratorList.Length();

  {
    // notify the enumerators
    MutexAutoLock lock(mListLock);
    for (uint32_t ctr = 0; ctr < count; ++ctr) {
      mEnumeratorList[ctr]->WindowRemoved(aInfo);
    }

    // remove the element from the list
    if (aInfo == mOldestWindow) {
      mOldestWindow =
          aInfo->mYounger == mOldestWindow ? nullptr : aInfo->mYounger;
    }
    aInfo->Unlink();
  }

  // a window being removed from us signifies a newly closed window.
  // send notifications.
  nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
  if (os) {
    nsCOMPtr<nsISupports> domwin(do_QueryInterface(aInfo->mWindow));
    os->NotifyObservers(domwin, "domwindowclosed", nullptr);
  }

  delete aInfo;
  return NS_OK;
}

NS_IMETHODIMP
nsWindowWatcher::GetChromeForWindow(mozIDOMWindowProxy* aWindow,
                                    nsIWebBrowserChrome** aResult) {
  if (!aWindow || !aResult) {
    return NS_ERROR_INVALID_ARG;
  }
  *aResult = nullptr;

  MutexAutoLock lock(mListLock);
  nsWatcherWindowEntry* info = FindWindowEntry(aWindow);
  if (info) {
    if (info->mChromeWeak) {
      return info->mChromeWeak->QueryReferent(
          NS_GET_IID(nsIWebBrowserChrome), reinterpret_cast<void**>(aResult));
    }
    *aResult = info->mChrome;
    NS_IF_ADDREF(*aResult);
  }
  return NS_OK;
}

NS_IMETHODIMP
nsWindowWatcher::GetWindowByName(const nsAString& aTargetName,
                                 mozIDOMWindowProxy** aResult) {
  if (!aResult) {
    return NS_ERROR_INVALID_ARG;
  }

  *aResult = nullptr;

  // We won't be able to find any windows with a special or empty name.
  if (aTargetName.IsEmpty() || nsContentUtils::IsSpecialName(aTargetName)) {
    return NS_OK;
  }

  // Search each toplevel in the chrome BrowsingContextGroup for a window with
  // the given name.
  for (const RefPtr<BrowsingContext>& toplevel :
       BrowsingContextGroup::GetChromeGroup()->Toplevels()) {
    BrowsingContext* context =
        toplevel->FindWithNameInSubtree(aTargetName, nullptr);
    if (context) {
      *aResult = do_AddRef(context->GetDOMWindow()).take();
      MOZ_ASSERT(*aResult);
      return NS_OK;
    }
  }

  return NS_OK;
}

bool nsWindowWatcher::AddEnumerator(nsWatcherWindowEnumerator* aEnumerator) {
  // (requires a lock; assumes it's called by someone holding the lock)
  // XXX(Bug 1631371) Check if this should use a fallible operation as it
  // pretended earlier, or change the return type to void.
  mEnumeratorList.AppendElement(aEnumerator);
  return true;
}

bool nsWindowWatcher::RemoveEnumerator(nsWatcherWindowEnumerator* aEnumerator) {
  // (requires a lock; assumes it's called by someone holding the lock)
  return mEnumeratorList.RemoveElement(aEnumerator);
}

nsresult nsWindowWatcher::URIfromURL(const nsACString& aURL,
                                     mozIDOMWindowProxy* aParent,
                                     nsIURI** aURI) {
  // Build the URI relative to the entry global.
  nsCOMPtr<nsPIDOMWindowInner> baseWindow = do_QueryInterface(GetEntryGlobal());

  // failing that, build it relative to the parent window, if possible
  if (!baseWindow && aParent) {
    baseWindow = nsPIDOMWindowOuter::From(aParent)->GetCurrentInnerWindow();
  }

  // failing that, use the given URL unmodified. It had better not be relative.

  nsIURI* baseURI = nullptr;

  // get baseWindow's document URI
  if (baseWindow) {
    if (Document* doc = baseWindow->GetDoc()) {
      baseURI = doc->GetDocBaseURI();
    }
  }

  // build and return the absolute URI
  return NS_NewURI(aURI, aURL, nullptr, baseURI);
}

// static
bool nsWindowWatcher::ShouldOpenPopup(const WindowFeatures& aFeatures) {
  if (aFeatures.IsEmpty()) {
    return false;
  }

  // NOTE: This is different than chrome-only "popup" feature that is handled
  //       in nsWindowWatcher::CalculateChromeFlagsForSystem.
  if (aFeatures.Exists("popup")) {
    return aFeatures.GetBool("popup");
  }

  if (!aFeatures.GetBoolWithDefault("location", false) &&
      !aFeatures.GetBoolWithDefault("toolbar", false)) {
    return true;
  }

  if (!aFeatures.GetBoolWithDefault("menubar", false)) {
    return true;
  }

  if (!aFeatures.GetBoolWithDefault("resizable", true)) {
    return true;
  }

  if (!aFeatures.GetBoolWithDefault("scrollbars", false)) {
    return true;
  }

  if (!aFeatures.GetBoolWithDefault("status", false)) {
    return true;
  }

  return false;
}

/**
 * Calculate the chrome bitmask from a string list of features requested
 * from a child process. The feature string can only control whether to open a
 * new tab or a new popup.
 * @param aFeatures a string containing a list of named features
 * @param aIsPopupRequested an out parameter that indicates whether a popup
 *        is requested by aFeatures
 * @return the chrome bitmask
 */
// static
uint32_t nsWindowWatcher::CalculateChromeFlagsForContent(
    const WindowFeatures& aFeatures,
    const mozilla::dom::UserActivation::Modifiers& aModifiers,
    bool* aIsPopupRequested) {
  if (aFeatures.IsEmpty() || !ShouldOpenPopup(aFeatures)) {
    // Open the current/new tab in the current/new window
    // (depends on browser.link.open_newwindow).
    return nsIWebBrowserChrome::CHROME_ALL;
  }

  int32_t unused;
  if (IsWindowOpenLocationModified(aModifiers, &unused)) {
    // If modifier keys are held when `window.open` is called, open a new
    // foreground/background tab in the current window, or open a new tab in a
    // new window, depending on the modifiers combination.
    return nsIWebBrowserChrome::CHROME_ALL;
  }

  // Open a minimal popup.
  *aIsPopupRequested = true;
  return nsIWebBrowserChrome::CHROME_MINIMAL_POPUP;
}

/**
 * Calculate the chrome bitmask from a string list of features for a new
 * privileged window.
 * @param aFeatures a string containing a list of named chrome features
 * @param aDialog affects the assumptions made about unnamed features
 * @param aChromeURL true if the window is being sent to a chrome:// URL
 * @return the chrome bitmask
 */
// static
uint32_t nsWindowWatcher::CalculateChromeFlagsForSystem(
    const WindowFeatures& aFeatures, bool aDialog, bool aChromeURL) {
  MOZ_ASSERT(XRE_IsParentProcess());
  MOZ_ASSERT(nsContentUtils::LegacyIsCallerChromeOrNativeCode());

  uint32_t chromeFlags = 0;

  // The features string is made void by OpenWindowInternal
  // if nullptr was originally passed as the features string.
  if (aFeatures.IsEmpty()) {
    chromeFlags = nsIWebBrowserChrome::CHROME_ALL;
    if (aDialog) {
      chromeFlags |= nsIWebBrowserChrome::CHROME_OPENAS_DIALOG |
                     nsIWebBrowserChrome::CHROME_OPENAS_CHROME;
    }
  } else {
    chromeFlags = nsIWebBrowserChrome::CHROME_WINDOW_BORDERS;
  }

  /* This function has become complicated since browser windows and
     dialogs diverged. The difference is, browser windows assume all
     chrome not explicitly mentioned is off, if the features string
     is not null. Exceptions are some OS border chrome new with Mozilla.
     Dialogs interpret a (mostly) empty features string to mean
     "OS's choice," and also support an "all" flag explicitly disallowed
     in the standards-compliant window.(normal)open. */

  bool presenceFlag = false;
  if (aDialog && aFeatures.GetBoolWithDefault("all", false, &presenceFlag)) {
    chromeFlags = nsIWebBrowserChrome::CHROME_ALL;
  }

  /* Next, allow explicitly named options to override the initial settings */
  if (aFeatures.GetBoolWithDefault("titlebar", false, &presenceFlag)) {
    chromeFlags |= nsIWebBrowserChrome::CHROME_TITLEBAR;
  }
  if (aFeatures.GetBoolWithDefault("close", false, &presenceFlag)) {
    chromeFlags |= nsIWebBrowserChrome::CHROME_WINDOW_CLOSE;
  }
  if (aFeatures.GetBoolWithDefault("toolbar", false, &presenceFlag)) {
    chromeFlags |= nsIWebBrowserChrome::CHROME_TOOLBAR;
  }
  if (aFeatures.GetBoolWithDefault("location", false, &presenceFlag)) {
    chromeFlags |= nsIWebBrowserChrome::CHROME_LOCATIONBAR;
  }
  if (aFeatures.GetBoolWithDefault("personalbar", false, &presenceFlag)) {
    chromeFlags |= nsIWebBrowserChrome::CHROME_PERSONAL_TOOLBAR;
  }
  if (aFeatures.GetBoolWithDefault("status", false, &presenceFlag)) {
    chromeFlags |= nsIWebBrowserChrome::CHROME_STATUSBAR;
  }
  if (aFeatures.GetBoolWithDefault("menubar", false, &presenceFlag)) {
    chromeFlags |= nsIWebBrowserChrome::CHROME_MENUBAR;
  }
  if (aFeatures.GetBoolWithDefault("resizable", false, &presenceFlag)) {
    chromeFlags |= nsIWebBrowserChrome::CHROME_WINDOW_RESIZE;
  }
  if (aFeatures.GetBoolWithDefault("minimizable", false, &presenceFlag)) {
    chromeFlags |= nsIWebBrowserChrome::CHROME_WINDOW_MINIMIZE;
  }
  if (aFeatures.GetBoolWithDefault("scrollbars", true, &presenceFlag)) {
    chromeFlags |= nsIWebBrowserChrome::CHROME_SCROLLBARS;
  }

  // Determine whether the window is a private browsing window
  if (aFeatures.GetBoolWithDefault("private", false, &presenceFlag)) {
    chromeFlags |= nsIWebBrowserChrome::CHROME_PRIVATE_WINDOW;
  }
  if (aFeatures.GetBoolWithDefault("non-private", false, &presenceFlag)) {
    chromeFlags |= nsIWebBrowserChrome::CHROME_NON_PRIVATE_WINDOW;
  }

  // Determine whether the window should have remote tabs.
  bool remote = BrowserTabsRemoteAutostart();

  if (remote) {
    remote = !aFeatures.GetBoolWithDefault("non-remote", false, &presenceFlag);
  } else {
    remote = aFeatures.GetBoolWithDefault("remote", false, &presenceFlag);
  }

  if (remote) {
    chromeFlags |= nsIWebBrowserChrome::CHROME_REMOTE_WINDOW;
  }

  // Determine whether the window should have remote subframes
  bool fission = FissionAutostart();

  if (fission) {
    fission =
        !aFeatures.GetBoolWithDefault("non-fission", false, &presenceFlag);
  } else {
    fission = aFeatures.GetBoolWithDefault("fission", false, &presenceFlag);
  }

  if (fission) {
    chromeFlags |= nsIWebBrowserChrome::CHROME_FISSION_WINDOW;
  }

  /* OK.
     Normal browser windows, in spite of a stated pattern of turning off
     all chrome not mentioned explicitly, will want the new OS chrome (window
     borders, titlebars, closebox) on, unless explicitly turned off.
     Dialogs, on the other hand, take the absence of any explicit settings
     to mean "OS' choice." */

  // default titlebar and closebox to "on," if not mentioned at all
  if (!aFeatures.Exists("titlebar")) {
    chromeFlags |= nsIWebBrowserChrome::CHROME_TITLEBAR;
  }
  if (!aFeatures.Exists("close")) {
    chromeFlags |= nsIWebBrowserChrome::CHROME_WINDOW_CLOSE;
  }

  if (aDialog && !aFeatures.IsEmpty() && !presenceFlag) {
    chromeFlags = nsIWebBrowserChrome::CHROME_DEFAULT;
  }

  /* Finally, once all the above normal chrome has been divined, deal
     with the features that are more operating hints than appearance
     instructions. (Note modality implies dependence.) */

  if (aFeatures.GetBoolWithDefault("alwayslowered", false) ||
      aFeatures.GetBoolWithDefault("z-lock", false)) {
    chromeFlags |= nsIWebBrowserChrome::CHROME_WINDOW_LOWERED;
  } else if (aFeatures.GetBoolWithDefault("alwaysraised", false)) {
    chromeFlags |= nsIWebBrowserChrome::CHROME_WINDOW_RAISED;
  }

  if (aFeatures.GetBoolWithDefault("suppressanimation", false)) {
    chromeFlags |= nsIWebBrowserChrome::CHROME_SUPPRESS_ANIMATION;
  }
  if (aFeatures.GetBoolWithDefault("alwaysontop", false)) {
    chromeFlags |= nsIWebBrowserChrome::CHROME_ALWAYS_ON_TOP;
  }
  if (aFeatures.GetBoolWithDefault("chrome", false)) {
    chromeFlags |= nsIWebBrowserChrome::CHROME_OPENAS_CHROME;
  }
  if (aFeatures.GetBoolWithDefault("extrachrome", false)) {
    chromeFlags |= nsIWebBrowserChrome::CHROME_EXTRA;
  }
  if (aFeatures.GetBoolWithDefault("centerscreen", false)) {
    chromeFlags |= nsIWebBrowserChrome::CHROME_CENTER_SCREEN;
  }
  if (aFeatures.GetBoolWithDefault("dependent", false)) {
    chromeFlags |= nsIWebBrowserChrome::CHROME_DEPENDENT;
  }
  if (aFeatures.GetBoolWithDefault("modal", false)) {
    chromeFlags |= nsIWebBrowserChrome::CHROME_MODAL |
                   nsIWebBrowserChrome::CHROME_DEPENDENT;
  }
  if (aFeatures.GetBoolWithDefault("dialog", false)) {
    chromeFlags |= nsIWebBrowserChrome::CHROME_OPENAS_DIALOG;
  }
  if (aFeatures.GetBoolWithDefault("alert", false)) {
    chromeFlags |= nsIWebBrowserChrome::CHROME_ALERT;
  }

  /* dialogs need to have the last word. assume dialogs are dialogs,
     and opened as chrome, unless explicitly told otherwise. */
  if (aDialog) {
    if (!aFeatures.Exists("dialog")) {
      chromeFlags |= nsIWebBrowserChrome::CHROME_OPENAS_DIALOG;
    }
    if (!aFeatures.Exists("chrome")) {
      chromeFlags |= nsIWebBrowserChrome::CHROME_OPENAS_CHROME;
    }
  }

  return chromeFlags;
}

// public static
bool nsWindowWatcher::HaveSpecifiedSize(const WindowFeatures& features) {
  return CalcSizeSpec(features, false, CSSToDesktopScale()).SizeSpecified();
}

// static
SizeSpec CalcSizeSpec(const WindowFeatures& aFeatures, bool aHasChromeParent,
                      CSSToDesktopScale aCSSToDesktopScale) {
  SizeSpec result;
  // https://drafts.csswg.org/cssom-view/#set-up-browsing-context-features
  // To set up browsing context features for a browsing context `target` given
  // a map `tokenizedFeatures`:

  // Step 1. Let `x` be null.
  // (implicit)

  // Step 2. Let `y` be null.
  // (implicit)

  // Step 3. Let `width` be null.
  // (implicit)

  // Step 4. Let `height` be null.
  // (implicit)

  // Step 5. If `tokenizedFeatures["left"]` exists:
  if (aFeatures.Exists("left")) {
    // Step 5.1. Set `x` to the result of invoking the rules for parsing
    // integers on `tokenizedFeatures["left"]`.
    //
    // Step 5.2. If `x` is an error, set `x` to 0.
    int32_t x = aFeatures.GetInt("left");

    // Step 5.3. Optionally, clamp `x` in a user-agent-defined manner so that
    // the window does not move outside the Web-exposed available screen area.
    // (done later)

    // Step 5.4. Optionally, move `target`’s window such that the window’s
    // left edge is at the horizontal coordinate `x` relative to the left edge
    // of the Web-exposed screen area, measured in CSS pixels of target.
    // The positive axis is rightward.
    result.mLeft.emplace((CSSCoord(x) * aCSSToDesktopScale).Rounded());
  }

  // Step 6. If `tokenizedFeatures["top"]` exists:
  if (aFeatures.Exists("top")) {
    // Step 6.1. Set `y` to the result of invoking the rules for parsing
    // integers on `tokenizedFeatures["top"]`.
    //
    // Step 6.2. If `y` is an error, set `y` to 0.
    int32_t y = aFeatures.GetInt("top");

    // Step 6.3. Optionally, clamp `y` in a user-agent-defined manner so that
    // the window does not move outside the Web-exposed available screen area.
    // (done later)

    // Step 6.4. Optionally, move `target`’s window such that the window’s top
    // edge is at the vertical coordinate `y` relative to the top edge of the
    // Web-exposed screen area, measured in CSS pixels of target. The positive
    // axis is downward.
    result.mTop.emplace((CSSCoord(y) * aCSSToDesktopScale).Rounded());
  }

  // Non-standard extension.
  // Not exposed to web content.
  if (aHasChromeParent && aFeatures.Exists("outerwidth")) {
    int32_t width = aFeatures.GetInt("outerwidth");
    if (width) {
      result.mOuterWidth.emplace(width);
    }
  }

  if (result.mOuterWidth.isNothing()) {
    // Step 7. If `tokenizedFeatures["width"]` exists:
    if (aFeatures.Exists("width")) {
      // Step 7.1. Set `width` to the result of invoking the rules for parsing
      // integers on `tokenizedFeatures["width"]`.
      //
      // Step 7.2. If `width` is an error, set `width` to 0.
      int32_t width = aFeatures.GetInt("width");

      // Step 7.3. If `width` is not 0:
      if (width) {
        // Step 7.3.1. Optionally, clamp `width` in a user-agent-defined manner
        // so that the window does not get too small or bigger than the
        // Web-exposed available screen area.
        // (done later)

        // Step 7.3.2. Optionally, size `target`’s window by moving its right
        // edge such that the distance between the left and right edges of the
        // viewport are `width` CSS pixels of target.
        result.mInnerWidth.emplace(width);

        // Step 7.3.3. Optionally, move target’s window in a user-agent-defined
        // manner so that it does not grow outside the Web-exposed available
        // screen area.
        // (done later)
      }
    }
  }

  // Non-standard extension.
  // Not exposed to web content.
  if (aHasChromeParent && aFeatures.Exists("outerheight")) {
    int32_t height = aFeatures.GetInt("outerheight");
    if (height) {
      result.mOuterHeight.emplace(height);
    }
  }

  if (result.mOuterHeight.isNothing()) {
    // Step 8. If `tokenizedFeatures["height"]` exists:
    if (aFeatures.Exists("height")) {
      // Step 8.1. Set `height` to the result of invoking the rules for parsing
      // integers on `tokenizedFeatures["height"]`.
      //
      // Step 8.2. If `height` is an error, set `height` to 0.
      int32_t height = aFeatures.GetInt("height");

      // Step 8.3. If `height` is not 0:
      if (height) {
        // Step 8.3.1. Optionally, clamp `height` in a user-agent-defined manner
        // so that the window does not get too small or bigger than the
        // Web-exposed available screen area.
        // (done later)

        // Step 8.3.2. Optionally, size `target`’s window by moving its bottom
        // edge such that the distance between the top and bottom edges of the
        // viewport are `height` CSS pixels of target.
        result.mInnerHeight.emplace(height);

        // Step 8.3.3. Optionally, move target’s window in a user-agent-defined
        // manner so that it does not grow outside the Web-exposed available
        // screen area.
        // (done later)
      }
    }
  }

  // NOTE: The value is handled only on chrome-priv code.
  // See nsWindowWatcher::SizeOpenedWindow.
  result.mLockAspectRatio =
      aFeatures.GetBoolWithDefault("lockaspectratio", false);
  return result;
}

/* Size and position a new window according to aSizeSpec. This method
   is assumed to be called after the window has already been given
   a default position and size; thus its current position and size are
   accurate defaults. The new window is made visible at method end.
   @param aTreeOwner
          The top-level nsIDocShellTreeOwner of the newly opened window.
   @param aParent
          The parent window, used to do security checks.
   @param aIsCallerChrome
          True if the code requesting the new window is privileged.
   @param aSizeSpec
          The size that the new window should be.
*/
static void SizeOpenedWindow(nsIDocShellTreeOwner* aTreeOwner,
                             mozIDOMWindowProxy* aParent, bool aIsCallerChrome,
                             const SizeSpec& aSizeSpec) {
  // We should only be sizing top-level windows if we're in the parent
  // process.
  MOZ_ASSERT(XRE_IsParentProcess());

  // get various interfaces for aDocShellItem, used throughout this method
  nsCOMPtr<nsIBaseWindow> treeOwnerAsWin(do_QueryInterface(aTreeOwner));
  if (!treeOwnerAsWin) {  // we'll need this to actually size the docshell
    return;
  }

  // The current position and size will be unchanged if not specified
  // (and they fit entirely onscreen). Also, calculate the difference
  // between chrome and content sizes on aDocShellItem's window.
  // This latter point becomes important if chrome and content
  // specifications are mixed in aFeatures, and when bringing the window
  // back from too far off the right or bottom edges of the screen.
  DesktopIntCoord left = 0;
  DesktopIntCoord top = 0;
  CSSIntCoord width = 0;
  CSSIntCoord height = 0;
  // difference between chrome and content size
  CSSIntCoord chromeWidth = 0;
  CSSIntCoord chromeHeight = 0;
  // whether the window size spec refers to chrome or content
  bool sizeChromeWidth = true;
  bool sizeChromeHeight = true;

  {
    CSSToLayoutDeviceScale cssToDevScale =
        treeOwnerAsWin->UnscaledDevicePixelsPerCSSPixel();
    DesktopToLayoutDeviceScale devToDesktopScale =
        treeOwnerAsWin->DevicePixelsPerDesktopPixel();

    LayoutDeviceIntRect devPxRect = treeOwnerAsWin->GetPositionAndSize();
    width = (LayoutDeviceCoord(devPxRect.width) / cssToDevScale).Rounded();
    height = (LayoutDeviceCoord(devPxRect.height) / cssToDevScale).Rounded();
    left = (LayoutDeviceCoord(devPxRect.x) / devToDesktopScale).Rounded();
    top = (LayoutDeviceCoord(devPxRect.y) / devToDesktopScale).Rounded();

    LayoutDeviceIntSize contentSize;
    bool hasPrimaryContent = false;
    aTreeOwner->GetHasPrimaryContent(&hasPrimaryContent);
    if (hasPrimaryContent) {
      aTreeOwner->GetPrimaryContentSize(&contentSize.width,
                                        &contentSize.height);
    } else {
      aTreeOwner->GetRootShellSize(&contentSize.width, &contentSize.height);
    }

    CSSIntSize contentSizeCSS = RoundedToInt(contentSize / cssToDevScale);
    chromeWidth = width - contentSizeCSS.width;
    chromeHeight = height - contentSizeCSS.height;
  }

  // Set up left/top
  if (aSizeSpec.mLeft) {
    left = *aSizeSpec.mLeft;
  }

  if (aSizeSpec.mTop) {
    top = *aSizeSpec.mTop;
  }

  // Set up width
  if (aSizeSpec.mOuterWidth) {
    width = *aSizeSpec.mOuterWidth;
  } else if (aSizeSpec.mInnerWidth) {
    sizeChromeWidth = false;
    width = *aSizeSpec.mInnerWidth;
  }

  // Set up height
  if (aSizeSpec.mOuterHeight) {
    height = *aSizeSpec.mOuterHeight;
  } else if (aSizeSpec.mInnerHeight) {
    sizeChromeHeight = false;
    height = *aSizeSpec.mInnerHeight;
  }

  bool positionSpecified = aSizeSpec.PositionSpecified();

  // Check security state for use in determining window dimensions
  bool enabled = false;
  if (aIsCallerChrome) {
    // Only enable special privileges for chrome when chrome calls
    // open() on a chrome window
    enabled = !aParent || nsGlobalWindowOuter::Cast(aParent)->IsChromeWindow();
  }

  const CSSIntCoord extraWidth = sizeChromeWidth ? CSSIntCoord(0) : chromeWidth;
  const CSSIntCoord extraHeight =
      sizeChromeHeight ? CSSIntCoord(0) : chromeHeight;

  if (!enabled) {
    // Security check failed.  Ensure all args meet minimum reqs.

    int32_t oldTop = top, oldLeft = left;

    // We'll also need the screen dimensions
    nsCOMPtr<nsIScreen> screen;
    nsCOMPtr<nsIScreenManager> screenMgr(
        do_GetService("@mozilla.org/gfx/screenmanager;1"));
    if (screenMgr) {
      // XXX width, height are in CSS rather than desktop pixels here.
      screenMgr->ScreenForRect(left, top, width, height,
                               getter_AddRefs(screen));
    }
    if (screen) {
      CSSIntCoord winWidth = width + extraWidth;
      CSSIntCoord winHeight = height + extraHeight;

      auto screenCssToDesktopScale = screen->GetCSSToDesktopScale();

      const DesktopIntRect screenDesktopRect = screen->GetAvailRectDisplayPix();
      // Get screen dimensions (in CSS pixels)
      const CSSSize screenCssSize =
          screenDesktopRect.Size() / screenCssToDesktopScale;

      if (aSizeSpec.SizeSpecified()) {
        if (!nsContentUtils::ShouldResistFingerprinting(
                "When RFP is enabled, we unconditionally round new window "
                "sizes. The code paths that create new windows are "
                "complicated, and this is a conservative behavior to avoid "
                "exempting something that shouldn't be. It also presents a "
                "uniform behavior for something that's very browser-related.",
                RFPTarget::RoundWindowSize)) {
          /* Unlike position, force size out-of-bounds check only if
             size actually was specified. Otherwise, intrinsically sized
             windows are broken. */
          if (height < 100) {
            height = 100;
            winHeight = height + extraHeight;
          }
          if (winHeight > screenCssSize.height) {
            height = static_cast<int32_t>(screenCssSize.height - extraHeight);
          }
          if (width < 100) {
            width = 100;
            winWidth = width + extraWidth;
          }
          if (winWidth > screenCssSize.width) {
            width = static_cast<int32_t>(screenCssSize.width - extraWidth);
          }
        } else {
          int32_t targetContentWidth = 0;
          int32_t targetContentHeight = 0;

          nsContentUtils::CalcRoundedWindowSizeForResistingFingerprinting(
              chromeWidth, chromeHeight, screenCssSize.width,
              screenCssSize.height, width, height, sizeChromeWidth,
              sizeChromeHeight, &targetContentWidth, &targetContentHeight);

          if (aSizeSpec.mInnerWidth || aSizeSpec.mOuterWidth) {
            width = targetContentWidth;
            winWidth = width + extraWidth;
          }

          if (aSizeSpec.mInnerHeight || aSizeSpec.mOuterHeight) {
            height = targetContentHeight;
            winHeight = height + extraHeight;
          }
        }
      }

      const DesktopIntCoord desktopWinWidth =
          (CSSCoord(winWidth) * screenCssToDesktopScale).Rounded();
      const DesktopIntCoord desktopWinHeight =
          (CSSCoord(winHeight) * screenCssToDesktopScale).Rounded();
      CheckedInt<int32_t> leftPlusWinWidth = int32_t(left);
      leftPlusWinWidth += int32_t(desktopWinWidth);
      if (!leftPlusWinWidth.isValid() ||
          leftPlusWinWidth.value() > screenDesktopRect.XMost()) {
        left = screenDesktopRect.XMost() - desktopWinWidth;
      }
      if (left < screenDesktopRect.x) {
        left = screenDesktopRect.x;
      }

      CheckedInt<int32_t> topPlusWinHeight = int32_t(top);
      topPlusWinHeight += int32_t(desktopWinHeight);
      if (!topPlusWinHeight.isValid() ||
          topPlusWinHeight.value() > screenDesktopRect.YMost()) {
        top = screenDesktopRect.YMost() - desktopWinHeight;
      }
      if (top < screenDesktopRect.y) {
        top = screenDesktopRect.y;
      }

      if (top != oldTop || left != oldLeft) {
        positionSpecified = true;
      }
    }
  }

  // size and position the window

  if (positionSpecified) {
    treeOwnerAsWin->SetPositionDesktopPix(left, top);
  }

  if (aSizeSpec.SizeSpecified()) {
    const CSSToLayoutDeviceScale scale =
        treeOwnerAsWin->UnscaledDevicePixelsPerCSSPixel();

    /* Prefer to trust the interfaces, which think in terms of pure
       chrome or content sizes. If we have a mix, use the chrome size
       adjusted by the chrome/content differences calculated earlier. */
    if (!sizeChromeWidth && !sizeChromeHeight) {
      const LayoutDeviceIntCoord widthDevPx =
          (CSSCoord(width) * scale).Rounded();
      const LayoutDeviceIntCoord heightDevPx =
          (CSSCoord(height) * scale).Rounded();
      bool hasPrimaryContent = false;
      aTreeOwner->GetHasPrimaryContent(&hasPrimaryContent);
      if (hasPrimaryContent) {
        aTreeOwner->SetPrimaryContentSize(widthDevPx, heightDevPx);
      } else {
        aTreeOwner->SetRootShellSize(widthDevPx, heightDevPx);
      }
    } else {
      const LayoutDeviceIntCoord widthDevPx =
          (CSSCoord(width + extraWidth) * scale).Rounded();
      const LayoutDeviceIntCoord heightDevPx =
          (CSSCoord(height + extraHeight) * scale).Rounded();
      treeOwnerAsWin->SetSize(widthDevPx, heightDevPx, false);
    }
  }

  if (aIsCallerChrome) {
    nsCOMPtr<nsIAppWindow> appWin = do_GetInterface(treeOwnerAsWin);
    if (appWin && aSizeSpec.mLockAspectRatio) {
      appWin->LockAspectRatio(true);
    }
  }

  treeOwnerAsWin->SetVisibility(true);
}

/* static */
bool nsWindowWatcher::IsWindowOpenLocationModified(
    const mozilla::dom::UserActivation::Modifiers& aModifiers,
    int32_t* aLocation) {
  // Perform the subset of BrowserUtils.whereToOpenLink in
  // toolkit/modules/BrowserUtils.sys.mjs
#ifdef XP_MACOSX
  bool metaKey = aModifiers.IsMeta();
#else
  bool metaKey = aModifiers.IsControl();
#endif
  bool shiftKey = aModifiers.IsShift();
  if (metaKey) {
    if (shiftKey) {
      *aLocation = nsIBrowserDOMWindow::OPEN_NEWTAB;
      return true;
    }
    *aLocation = nsIBrowserDOMWindow::OPEN_NEWTAB_BACKGROUND;
    return true;
  }
  if (shiftKey) {
    *aLocation = nsIBrowserDOMWindow::OPEN_NEWWINDOW;
    return true;
  }

  return false;
}

/* static */
int32_t nsWindowWatcher::GetWindowOpenLocation(
    nsPIDOMWindowOuter* aParent, uint32_t aChromeFlags,
    const mozilla::dom::UserActivation::Modifiers& aModifiers,
    bool aCalledFromJS, bool aIsForPrinting) {
  // These windows are not actually visible to the user, so we return the thing
  // that we can always handle.
  if (aIsForPrinting) {
    return nsIBrowserDOMWindow::OPEN_PRINT_BROWSER;
  }

  int32_t modifiedLocation = 0;
  if (IsWindowOpenLocationModified(aModifiers, &modifiedLocation)) {
    return modifiedLocation;
  }

  // Where should we open this?
  int32_t containerPref;
  if (NS_FAILED(
          Preferences::GetInt("browser.link.open_newwindow", &containerPref))) {
    // We couldn't read the user preference, so fall back on the default.
    return nsIBrowserDOMWindow::OPEN_NEWTAB;
  }

  bool isDisabledOpenNewWindow =
      aParent->GetFullScreen() &&
      Preferences::GetBool(
          "browser.link.open_newwindow.disabled_in_fullscreen");

  if (isDisabledOpenNewWindow &&
      (containerPref == nsIBrowserDOMWindow::OPEN_NEWWINDOW)) {
    containerPref = nsIBrowserDOMWindow::OPEN_NEWTAB;
  }

  if (containerPref != nsIBrowserDOMWindow::OPEN_NEWTAB &&
      containerPref != nsIBrowserDOMWindow::OPEN_CURRENTWINDOW) {
    // Just open a window normally
    return nsIBrowserDOMWindow::OPEN_NEWWINDOW;
  }

  if (aCalledFromJS) {
    /* Now check our restriction pref.  The restriction pref is a power-user's
       fine-tuning pref. values:
       0: no restrictions - divert everything
       1: don't divert window.open at all
       2: don't divert window.open with features
    */
    int32_t restrictionPref =
        Preferences::GetInt("browser.link.open_newwindow.restriction", 2);
    if (restrictionPref < 0 || restrictionPref > 2) {
      restrictionPref = 2;  // Sane default behavior
    }

    if (isDisabledOpenNewWindow) {
      // In browser fullscreen, the window should be opened
      // in the current window with no features (see bug 803675)
      restrictionPref = 0;
    }

    if (restrictionPref == 1) {
      return nsIBrowserDOMWindow::OPEN_NEWWINDOW;
    }

    if (restrictionPref == 2) {
      // Only continue if there is no special chrome flags - with the exception
      // of the remoteness and private flags, which might have been
      // automatically flipped by Gecko.
      int32_t uiChromeFlags = aChromeFlags;
      uiChromeFlags &= ~(nsIWebBrowserChrome::CHROME_REMOTE_WINDOW |
                         nsIWebBrowserChrome::CHROME_FISSION_WINDOW |
                         nsIWebBrowserChrome::CHROME_PRIVATE_WINDOW |
                         nsIWebBrowserChrome::CHROME_NON_PRIVATE_WINDOW |
                         nsIWebBrowserChrome::CHROME_PRIVATE_LIFETIME);
      if (uiChromeFlags != nsIWebBrowserChrome::CHROME_ALL) {
        return nsIBrowserDOMWindow::OPEN_NEWWINDOW;
      }
    }
  }

  return containerPref;
}