summaryrefslogtreecommitdiffstats
path: root/dom/interfaces/base/nsIDOMWindowUtils.idl
blob: fcfe407e840b268b933308b34f92efe9e793970c (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
/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "nsISupports.idl"

/**
 * nsIDOMWindowUtils is intended for infrequently-used methods related
 * to the current nsIDOMWindow.  Some of the methods may require
 * elevated privileges; the method implementations should contain the
 * necessary security checks.  Access this interface by calling
 * getInterface on a DOMWindow.
 *
 * WARNING: Do not use 'out jsval' parameters in this file.
 *          SpecialPowers, which is used to access nsIDOMWindowUtils
 *          in plain mochitests, does not know how to handle them.
 *          (Use 'jsval' return values instead.)
 */

%{C++
#include "nsColor.h"
class gfxContext;
struct nsRect;
%}

[ref] native nsConstRect(const nsRect);
native nscolor(nscolor);
[ptr] native gfxContext(gfxContext);
typedef unsigned long long nsViewID;

interface nsICycleCollectorListener;
interface nsIDOMNode;
interface nsIDOMNodeList;
interface nsIDOMElement;
interface nsIDOMHTMLCanvasElement;
interface nsIDOMEvent;
interface nsIDOMStyleSheet;
interface nsITransferable;
interface nsIQueryContentEventResult;
interface nsIDOMWindow;
interface nsIFile;
interface nsIDOMClientRect;
interface nsIURI;
interface nsIDOMEventTarget;
interface nsIRunnable;
interface nsITranslationNodeList;
interface nsIJSRAIIHelper;
interface nsIContentPermissionRequest;
interface nsIObserver;

[scriptable, uuid(c471d440-004b-4c50-a6f2-747db5f443b6)]
interface nsIDOMWindowUtils : nsISupports {

  /**
   * Image animation mode of the window. When this attribute's value
   * is changed, the implementation should set all images in the window
   * to the given value. That is, when set to kDontAnimMode, all images
   * will stop animating. The attribute's value must be one of the
   * animationMode values from imgIContainer.
   * @note Images may individually override the window's setting after
   *       the window's mode is set. Therefore images given different modes
   *       since the last setting of the window's mode may behave
   *       out of line with the window's overall mode.
   * @note The attribute's value is the window's overall mode. It may
   *       for example continue to report kDontAnimMode after all images
   *       have subsequently been individually animated.
   * @note Only images immediately in this window are affected;
   *       this is not recursive to subwindows.
   * @see imgIContainer
   */
  attribute unsigned short imageAnimationMode;

  /**
   * Whether the charset of the window's current document has been forced by
   * the user.
   * Cannot be accessed from unprivileged context (not content-accessible)
   */
  readonly attribute boolean docCharsetIsForced;

  /**
   * Get current cursor type from this window
   * @return the current value of nsCursor
   */
  short getCursorType();

  /**
   * Function to get metadata associated with the window's current document
   * @param aName the name of the metadata.  This should be all lowercase.
   * @return the value of the metadata, or the empty string if it's not set
   *
   * Will throw a DOM security error if called without chrome privileges.
   */
  AString getDocumentMetadata(in AString aName);

  /**
   * Force an immediate redraw of this window.  The parameter specifies
   * the number of times to redraw, and the return value is the length,
   * in milliseconds, that the redraws took.  If aCount is not specified
   * or is 0, it is taken to be 1.
   */
  unsigned long redraw([optional] in unsigned long aCount);

  /**
   * Force a synchronous layer transaction for this window if necessary.
   */
  void updateLayerTree();

  /**
   * Get the last used layer transaction id for this window's refresh driver.
   */
  readonly attribute unsigned long long lastTransactionId;

  /**
   * Information retrieved from the <meta name="viewport"> tag.
   * See nsContentUtils::GetViewportInfo for more information.
   */
  void getViewportInfo(in uint32_t aDisplayWidth, in uint32_t aDisplayHeight,
                       out double aDefaultZoom, out boolean aAllowZoom,
                       out double aMinZoom, out double aMaxZoom,
                       out uint32_t aWidth, out uint32_t aHeight,
                       out boolean aAutoSize);

  /**
   * Information about the window size in device pixels.
   */
  void getContentViewerSize(out uint32_t aDisplayWidth, out uint32_t aDisplayHeight);

  /**
   * For any scrollable element, this allows you to override the
   * visible region and draw more than what is visible, which is
   * useful for asynchronous drawing. The "displayport" will be
   * <xPx, yPx, widthPx, heightPx> in units of CSS pixels,
   * regardless of the size of the enclosing container.  This
   * will *not* trigger reflow.
   *
   * For the root scroll area, pass in the root document element.
   * For scrollable elements, pass in the container element (for
   * instance, the element with overflow: scroll).
   *
   * <x, y> is relative to the top-left of what would normally be
   * the visible area of the element. This means that the pixels
   * rendered to the displayport take scrolling into account,
   * for example.
   *
   * It's legal to set a displayport that extends beyond the overflow
   * area in any direction (left/right/top/bottom).
   *
   * It's also legal to set a displayport that extends beyond the
   * area's bounds.  No pixels are rendered outside the area bounds.
   *
   * The caller of this method must have chrome privileges.
   *
   * Calling this will always force a recomposite, so it should be
   * avoided if at all possible. Client code should do checks before
   * calling this so that duplicate sets are not made with the same
   * displayport.
   *
   * aPriority is recorded along with the displayport rectangle. If this
   * method is called with a lower priority than the current priority, the
   * call is ignored.
   */
  void setDisplayPortForElement(in float aXPx, in float aYPx,
                                in float aWidthPx, in float aHeightPx,
                                in nsIDOMElement aElement,
                                in uint32_t aPriority);
  /**
   * An alternate way to represent a displayport rect as a set of margins and a
   * base rect to apply those margins to. A consumer of pixels may ask for as
   * many extra pixels as it would like in each direction. Layout then sets
   * the base rect to the "visible rect" of the element, which is just the
   * subrect of the element that is drawn (it does not take in account content
   * covering the element).
   *
   * If both a displayport rect and displayport margins with corresponding base
   * rect are set with the same priority then the margins will take precendence.
   *
   * Specifying an alignment value will ensure that after the base rect has
   * been expanded by the displayport margins, it will be further expanded so
   * that each edge is located at a multiple of the "alignment" value.
   *
   * Note that both the margin values and alignment are treated as values in
   * ScreenPixels. Refer to layout/base/Units.h for a description of this unit.
   * The base rect values are in app units.
   */
  void setDisplayPortMarginsForElement(in float aLeftMargin,
                                       in float aTopMargin,
                                       in float aRightMargin,
                                       in float aBottomMargin,
                                       in nsIDOMElement aElement,
                                       in uint32_t aPriority);

  void setDisplayPortBaseForElement(in int32_t aX,
                                    in int32_t aY,
                                    in int32_t aWidth,
                                    in int32_t aHeight,
                                    in nsIDOMElement aElement);

  /**
   * Get/set the resolution at which rescalable web content is drawn.
   *
   * Setting a new resolution does *not* trigger reflow.  This API is
   * entirely separate from textZoom and fullZoom; a resolution scale
   * can be applied together with both textZoom and fullZoom.
   *
   * The effect of this API is for gfx code to allocate more or fewer
   * pixels for rescalable content by a factor of |resolution| in
   * both dimensions.  The scale at which the content is displayed does
   * not change; if that is desired, use setResolutionAndScaleTo() instead.
   *
   * The caller of this method must have chrome privileges.
   */
  void setResolution(in float aResolution);

  void getResolution(out float aResolution);

  /**
   * Similar to setResolution(), but also scales the content by the
   * amount of the resolution, so that it is displayed at a
   * correspondingly larger or smaller size, without the need for
   * the caller to set an additional transform.
   *
   * This can be used to implement a non-reflowing scale-zoom, e.g.
   * for pinch-zoom on mobile platforms.
   *
   * The caller of this method must have chrome privileges.
   */
  void setResolutionAndScaleTo(in float aResolution);

  /**
   * Set a resolution on the presShell which is the "restored" from history.
   * The display dimensions are compared to their current values and used
   * to scale the resolution value if necessary, e.g. if the device was
   * rotated between saving and restoring of the session data.
   * This resolution should be used when painting for the first time. Calling
   * this too late may have no effect.
   */
  void setRestoreResolution(in float aResolution,
                            in uint32_t aDisplayWidth,
                            in uint32_t aDisplayHeight);

  /**
   * Whether the resolution has been set by the user.
   * This gives a way to check whether the provided resolution is the default
   * value or restored from a previous session.
   *
   * Can only be accessed with chrome privileges.
   */
  readonly attribute boolean isResolutionSet;

  /**
   * Whether the next paint should be flagged as the first paint for a document.
   * This gives a way to track the next paint that occurs after the flag is
   * set. The flag gets cleared after the next paint.
   *
   * Can only be accessed with chrome privileges.
   */
  attribute boolean isFirstPaint;

  void getPresShellId(out uint32_t aPresShellId);

  /**
   * Following modifiers are for sent*Event() except sendNative*Event().
   * NOTE: MODIFIER_ALT, MODIFIER_CONTROL, MODIFIER_SHIFT and MODIFIER_META
   *       are must be same values as nsIDOMNSEvent::*_MASK for backward
   *       compatibility.
   */
  const long MODIFIER_ALT        = 0x0001;
  const long MODIFIER_CONTROL    = 0x0002;
  const long MODIFIER_SHIFT      = 0x0004;
  const long MODIFIER_META       = 0x0008;
  const long MODIFIER_ALTGRAPH   = 0x0010;
  const long MODIFIER_CAPSLOCK   = 0x0020;
  const long MODIFIER_FN         = 0x0040;
  const long MODIFIER_FNLOCK     = 0x0080;
  const long MODIFIER_NUMLOCK    = 0x0100;
  const long MODIFIER_SCROLLLOCK = 0x0200;
  const long MODIFIER_SYMBOL     = 0x0400;
  const long MODIFIER_SYMBOLLOCK = 0x0800;
  const long MODIFIER_OS         = 0x1000;

  /** Synthesize a mouse event. The event types supported are:
   *    mousedown, mouseup, mousemove, mouseover, mouseout, mousecancel,
   *    contextmenu, MozMouseHittest
   *
   * Events are sent in coordinates offset by aX and aY from the window.
   *
   * Note that additional events may be fired as a result of this call. For
   * instance, typically a click event will be fired as a result of a
   * mousedown and mouseup in sequence.
   *
   * Normally at this level of events, the mouseover and mouseout events are
   * only fired when the window is entered or exited. For inter-element
   * mouseover and mouseout events, a movemove event fired on the new element
   * should be sufficient to generate the correct over and out events as well.
   *
   * Cannot be accessed from unprivileged context (not content-accessible)
   * Will throw a DOM security error if called without chrome privileges.
   *
   * The event is dispatched via the toplevel window, so it could go to any
   * window under the toplevel window, in some cases it could never reach this
   * window at all.
   *
   * NOTE: mousecancel is used to represent the vanishing of an input device
   * such as a pen leaving its digitizer by synthesizing a WidgetMouseEvent,
   * whose mMessage is eMouseExitFromWidget and mExitFrom is
   * WidgetMouseEvent::eTopLevel.
   *
   * @param aType event type
   * @param aX x offset in CSS pixels
   * @param aY y offset in CSS pixels
   * @param aButton button to synthesize
   * @param aClickCount number of clicks that have been performed
   * @param aModifiers modifiers pressed, using constants defined as MODIFIER_*
   * @param aIgnoreRootScrollFrame whether the event should ignore viewport bounds
   *                           during dispatch
   * @param aPressure touch input pressure: 0.0 -> 1.0
   * @param aInputSourceArg input source, see nsIDOMMouseEvent for values,
   *        defaults to mouse input.
   * @param aIsDOMEventSynthesized controls nsIDOMEvent.isSynthesized value
   *                               that helps identifying test related events,
   *                               defaults to true
   * @param aIsWidgetEventSynthesized controls WidgetMouseEvent.mReason value
   *                                  defaults to false (WidgetMouseEvent::eReal)
   *
   * returns true if the page called prevent default on this event
   */
  [optional_argc]
  boolean sendMouseEvent(in AString aType,
                         in float aX,
                         in float aY,
                         in long aButton,
                         in long aClickCount,
                         in long aModifiers,
                         [optional] in boolean aIgnoreRootScrollFrame,
                         [optional] in float aPressure,
                         [optional] in unsigned short aInputSourceArg,
                         [optional] in boolean aIsDOMEventSynthesized,
                         [optional] in boolean aIsWidgetEventSynthesized,
                         [optional] in long aButtons);


  /** Synthesize a pointer event. The event types supported are:
   *    pointerdown, pointerup, pointermove, pointerover, pointerout
   *
   * Events are sent in coordinates offset by aX and aY from the window.
   *
   * Note that additional events may be fired as a result of this call. For
   * instance, typically a click event will be fired as a result of a
   * mousedown and mouseup in sequence.
   *
   * Normally at this level of events, the pointerover and pointerout events are
   * only fired when the window is entered or exited. For inter-element
   * pointerover and pointerout events, a movemove event fired on the new element
   * should be sufficient to generate the correct over and out events as well.
   *
   * Cannot be accessed from unprivileged context (not content-accessible)
   * Will throw a DOM security error if called without chrome privileges.
   *
   * The event is dispatched via the toplevel window, so it could go to any
   * window under the toplevel window, in some cases it could never reach this
   * window at all.
   *
   * @param aType event type
   * @param aX x offset in CSS pixels
   * @param aY y offset in CSS pixels
   * @param aButton button to synthesize
   * @param aClickCount number of clicks that have been performed
   * @param aModifiers modifiers pressed, using constants defined as MODIFIER_*
   * @param aIgnoreRootScrollFrame whether the event should ignore viewport bounds
   *                           during dispatch
   * @param aPressure touch input pressure: 0.0 -> 1.0
   * @param aInputSourceArg input source, see nsIDOMMouseEvent for values,
   *        defaults to mouse input.
   * @param aPointerId A unique identifier for the pointer causing the event. default is 0
   * @param aWidth The width (magnitude on the X axis), default is 0
   * @param aHeight The height (magnitude on the Y axis), default is 0
   * @param aTilt The plane angle between the Y-Z plane
   *        and the plane containing both the transducer (e.g. pen stylus) axis and the Y axis. default is 0
   * @param aTiltX The plane angle between the X-Z plane
   *        and the plane containing both the transducer (e.g. pen stylus) axis and the X axis. default is 0
   * @param aIsPrimary  Indicates if the pointer represents the primary pointer of this pointer type.
   * @param aIsSynthesized controls nsIDOMEvent.isSynthesized value
   *                       that helps identifying test related events,
   *                       defaults to true
   *
   * returns true if the page called prevent default on this event
   */

  [optional_argc]
  boolean sendPointerEvent(in AString aType,
                           in float aX,
                           in float aY,
                           in long aButton,
                           in long aClickCount,
                           in long aModifiers,
                           [optional] in boolean aIgnoreRootScrollFrame,
                           [optional] in float aPressure,
                           [optional] in unsigned short aInputSourceArg,
                           [optional] in long aPointerId,
                           [optional] in long aWidth,
                           [optional] in long aHeight,
                           [optional] in long aTiltX,
                           [optional] in long aTiltY,
                           [optional] in boolean aIsPrimary,
                           [optional] in boolean aIsSynthesized);

  /** Synthesize a touch event. The event types supported are:
   *    touchstart, touchend, touchmove, and touchcancel
   *
   * Events are sent in coordinates offset by aX and aY from the window.
   *
   * Cannot be accessed from unprivileged context (not content-accessible)
   * Will throw a DOM security error if called without chrome privileges.
   *
   * The event is dispatched via the toplevel window, so it could go to any
   * window under the toplevel window, in some cases it could never reach this
   * window at all.
   *
   * @param aType event type
   * @param xs array of offsets in CSS pixels for each touch to be sent
   * @param ys array of offsets in CSS pixels for each touch to be sent
   * @param rxs array of radii in CSS pixels for each touch to be sent
   * @param rys array of radii in CSS pixels for each touch to be sent
   * @param rotationAngles array of angles in degrees for each touch to be sent
   * @param forces array of forces (floats from 0 to 1) for each touch to be sent
   * @param count number of touches in this set
   * @param aModifiers modifiers pressed, using constants defined as MODIFIER_*
   * @param aIgnoreRootScrollFrame whether the event should ignore viewport bounds
   *                           during dispatch
   *
   * returns true if the page called prevent default on this touch event
   */
  boolean sendTouchEvent(in AString aType,
                         [array, size_is(count)] in uint32_t aIdentifiers,
                         [array, size_is(count)] in int32_t aXs,
                         [array, size_is(count)] in int32_t aYs,
                         [array, size_is(count)] in uint32_t aRxs,
                         [array, size_is(count)] in uint32_t aRys,
                         [array, size_is(count)] in float aRotationAngles,
                         [array, size_is(count)] in float aForces,
                         in uint32_t count,
                         in long aModifiers,
                         [optional] in boolean aIgnoreRootScrollFrame);

  /** The same as sendMouseEvent but ensures that the event is dispatched to
   *  this DOM window or one of its children.
   */
  [optional_argc]
  void sendMouseEventToWindow(in AString aType,
                              in float aX,
                              in float aY,
                              in long aButton,
                              in long aClickCount,
                              in long aModifiers,
                              [optional] in boolean aIgnoreRootScrollFrame,
                              [optional] in float aPressure,
                              [optional] in unsigned short aInputSourceArg,
                              [optional] in boolean aIsDOMEventSynthesized,
                              [optional] in boolean aIsWidgetEventSynthesized,
                              [optional] in long aButtons);

  /** The same as sendPointerEvent but ensures that the event
   *  is dispatched to this DOM window or one of its children.
   */
  [optional_argc]
  void sendPointerEventToWindow(in AString aType,
                                in float aX,
                                in float aY,
                                in long aButton,
                                in long aClickCount,
                                in long aModifiers,
                                [optional] in boolean aIgnoreRootScrollFrame,
                                [optional] in float aPressure,
                                [optional] in unsigned short aInputSourceArg,
                                [optional] in long aPointerId,
                                [optional] in long aWidth,
                                [optional] in long aHeight,
                                [optional] in long aTiltX,
                                [optional] in long aTiltY,
                                [optional] in boolean aIsPrimary,
                                [optional] in boolean aIsSynthesized);

  /** The same as sendTouchEvent but ensures that the event is dispatched to
   *  this DOM window or one of its children.
   */
  boolean sendTouchEventToWindow(in AString aType,
                                 [array, size_is(count)] in uint32_t aIdentifiers,
                                 [array, size_is(count)] in int32_t aXs,
                                 [array, size_is(count)] in int32_t aYs,
                                 [array, size_is(count)] in uint32_t aRxs,
                                 [array, size_is(count)] in uint32_t aRys,
                                 [array, size_is(count)] in float aRotationAngles,
                                 [array, size_is(count)] in float aForces,
                                 in uint32_t count,
                                 in long aModifiers,
                                 [optional] in boolean aIgnoreRootScrollFrame);

  /** Synthesize a wheel event for a window. The event types supported is only
   *  wheel.
   *
   * Events are sent in coordinates offset by aX and aY from the window.
   *
   * Cannot be accessed from unprivileged context (not content-accessible)
   * Will throw a DOM security error if called without chrome privileges.
   *
   * @param aX                 x offset in CSS pixels
   * @param aY                 y offset in CSS pixels
   * @param aDeltaX            deltaX value.
   * @param aDeltaY            deltaY value.
   * @param aDeltaZ            deltaZ value.
   * @param aDeltaMode         deltaMode value which must be one of
   *                           nsIDOMWheelEvent::DOM_DELTA_*.
   * @param aModifiers         modifiers pressed, using constants defined as
   *                           MODIFIER_*
   * @param aLineOrPageDeltaX  If you set this value non-zero for
   *                           DOM_DELTA_PIXEL event, EventStateManager will
   *                           dispatch NS_MOUSE_SCROLL event for horizontal
   *                           scroll.
   * @param aLineOrPageDeltaY  If you set this value non-zero for
   *                           DOM_DELTA_PIXEL event, EventStateManager will
   *                           dispatch NS_MOUSE_SCROLL event for vertical
   *                           scroll.
   * @param aOptions           Set following flags.
   */
  const unsigned long WHEEL_EVENT_CAUSED_BY_NO_LINE_OR_PAGE_DELTA_DEVICE = 0x0001;
  // @deprecated Use WHEEL_EVENT_CAUSED_BY_NO_LINE_OR_PAGE_DELTA_DEVICE.
  const unsigned long WHEEL_EVENT_CAUSED_BY_PIXEL_ONLY_DEVICE            = 0x0001;
  const unsigned long WHEEL_EVENT_CAUSED_BY_MOMENTUM                     = 0x0002;
  const unsigned long WHEEL_EVENT_CUSTOMIZED_BY_USER_PREFS               = 0x0004;
  // If any of the following flags is specified this method will throw an
  // exception in case the relevant overflowDelta has an unexpected value.
  const unsigned long WHEEL_EVENT_EXPECTED_OVERFLOW_DELTA_X_ZERO      = 0x0010;
  const unsigned long WHEEL_EVENT_EXPECTED_OVERFLOW_DELTA_X_POSITIVE  = 0x0020;
  const unsigned long WHEEL_EVENT_EXPECTED_OVERFLOW_DELTA_X_NEGATIVE  = 0x0040;
  const unsigned long WHEEL_EVENT_EXPECTED_OVERFLOW_DELTA_Y_ZERO      = 0x0100;
  const unsigned long WHEEL_EVENT_EXPECTED_OVERFLOW_DELTA_Y_POSITIVE  = 0x0200;
  const unsigned long WHEEL_EVENT_EXPECTED_OVERFLOW_DELTA_Y_NEGATIVE  = 0x0400;
  void sendWheelEvent(in float aX,
                      in float aY,
                      in double aDeltaX,
                      in double aDeltaY,
                      in double aDeltaZ,
                      in unsigned long aDeltaMode,
                      in long aModifiers,
                      in long aLineOrPageDeltaX,
                      in long aLineOrPageDeltaY,
                      in unsigned long aOptions);

  /**
   * Synthesize a key event to the window. The event types supported are:
   *   keydown, keyup, keypress
   *
   * Key events generally end up being sent to the focused node.
   *
   * Cannot be accessed from unprivileged context (not content-accessible)
   * Will throw a DOM security error if called without chrome privileges.
   *
   * @param aType event type
   * @param aKeyCode key code
   * @param aCharCode character code
   * @param aModifiers modifiers pressed, using constants defined as MODIFIER_*
   * @param aAdditionalFlags special flags for the key event, see KEY_FLAG_*.
   *
   * @return false if the event had preventDefault() called on it,
   *               true otherwise.  In other words, true if and only if the
   *               default action was taken.
   */

  // If this is set, preventDefault() the event before dispatch.
  const unsigned long KEY_FLAG_PREVENT_DEFAULT   = 0x0001;

  // If this is set, the mIsSynthesizedForTests flag is set to false
  // on the key event. Otherwise it is true.
  const unsigned long KEY_FLAG_NOT_SYNTHESIZED_FOR_TESTS = 0x0002;

  // if one of these flags is set, the KeyboardEvent.location will be the value.
  // Otherwise, it will be computed from aKeyCode.
  const unsigned long KEY_FLAG_LOCATION_STANDARD = 0x0010;
  const unsigned long KEY_FLAG_LOCATION_LEFT     = 0x0020;
  const unsigned long KEY_FLAG_LOCATION_RIGHT    = 0x0040;
  const unsigned long KEY_FLAG_LOCATION_NUMPAD   = 0x0080;

  boolean sendKeyEvent(in AString aType,
                       in long aKeyCode,
                       in long aCharCode,
                       in long aModifiers,
                       [optional] in unsigned long aAdditionalFlags);

  /**
   * See nsIWidget::SynthesizeNativeKeyEvent
   *
   * Cannot be accessed from unprivileged context (not content-accessible)
   * Will throw a DOM security error if called without chrome privileges.
   *
   * When you use this for tests, use the constants defined in NativeKeyCodes.js
   *
   * NOTE: The synthesized native event will be fired asynchronously, and upon
   * completion the observer, if provided, will be notified with a "keyevent"
   * topic.
   */
  void sendNativeKeyEvent(in long aNativeKeyboardLayout,
                          in long aNativeKeyCode,
                          in long aModifierFlags,
                          in AString aCharacters,
                          in AString aUnmodifiedCharacters,
                          [optional] in nsIObserver aObserver);

  /**
   * See nsIWidget::SynthesizeNativeMouseEvent
   *
   * Will be called on the widget that contains aElement.
   * Cannot be accessed from unprivileged context (not content-accessible)
   * Will throw a DOM security error if called without chrome privileges.
   *
   * NOTE: The synthesized native event will be fired asynchronously, and upon
   * completion the observer, if provided, will be notified with a "mouseevent"
   * topic.
   */
  void sendNativeMouseEvent(in long aScreenX,
                            in long aScreenY,
                            in long aNativeMessage,
                            in long aModifierFlags,
                            in nsIDOMElement aElement,
                            [optional] in nsIObserver aObserver);
  /**
   * See nsIWidget::SynthesizeNativeMouseMove and sendNativeMouseEvent
   */
  void sendNativeMouseMove(in long aScreenX,
                           in long aScreenY,
                           in nsIDOMElement aElement,
                           [optional] in nsIObserver aObserver);

  /**
   * The values for sendNativeMouseScrollEvent's aAdditionalFlags.
   */

  /**
   * If MOUSESCROLL_PREFER_WIDGET_AT_POINT is set, widget will dispatch
   * the event to a widget which is under the cursor.  Otherwise, dispatch to
   * a default target on the platform.  E.g., on Windows, it's focused window.
   */
  const unsigned long MOUSESCROLL_PREFER_WIDGET_AT_POINT = 0x00000001;

  /**
   * Interpret the scroll delta values as lines rather than pixels.
   */
  const unsigned long MOUSESCROLL_SCROLL_LINES = 0x00000002;

  /**
   * The platform specific values of aAdditionalFlags.  Must be over 0x00010000.
   */

  /**
   * If MOUSESCROLL_WIN_SCROLL_LPARAM_NOT_NULL is set and aNativeMessage is
   * WM_VSCROLL or WM_HSCROLL, widget will set the window handle to the lParam
   * instead of NULL.
   */
  const unsigned long MOUSESCROLL_WIN_SCROLL_LPARAM_NOT_NULL = 0x00010000;

  /**
   * See nsIWidget::SynthesizeNativeMouseScrollEvent
   *
   * Will be called on the widget that contains aElement.
   * Cannot be accessed from unprivileged context (not content-accessible)
   * Will throw a DOM security error if called without chrome privileges.
   *
   * NOTE: The synthesized native event will be fired asynchronously, and upon
   * completion the observer, if provided, will be notified with a
   * "mousescrollevent" topic.
   *
   * @param aNativeMessage
   *   On Windows:  WM_MOUSEWHEEL (0x020A), WM_MOUSEHWHEEL(0x020E),
   *                WM_VSCROLL (0x0115) or WM_HSCROLL (0x114).
   */
  void sendNativeMouseScrollEvent(in long aScreenX,
                                  in long aScreenY,
                                  in unsigned long aNativeMessage,
                                  in double aDeltaX,
                                  in double aDeltaY,
                                  in double aDeltaZ,
                                  in unsigned long aModifierFlags,
                                  in unsigned long aAdditionalFlags,
                                  in nsIDOMElement aElement,
                                  [optional] in nsIObserver aObserver);

  /**
   * Touch states for sendNativeTouchPoint. These values match
   * nsIWidget's TouchPointerState.
   */

  // The pointer is in a hover state above the digitizer
  const long TOUCH_HOVER   = 0x01;
  // The pointer is in contact with the digitizer
  const long TOUCH_CONTACT = 0x02;
  // The pointer has been removed from the digitizer detection area
  const long TOUCH_REMOVE  = 0x04;
  // The pointer has been canceled. Will cancel any pending os level
  // gestures that would be triggered as a result of completion of the
  // input sequence. This may not cancel moz platform related events
  // that might get tirggered by input already delivered.
  const long TOUCH_CANCEL  = 0x08;

  /**
   * Create a new or update an existing touch point on the digitizer.
   * To trigger os level gestures, individual touch points should
   * transition through a complete set of touch states which should be
   * sent as individual calls. For example:
   * tap - msg1:TOUCH_CONTACT, msg2:TOUCH_REMOVE
   * drag - msg1-n:TOUCH_CONTACT (moving), msgn+1:TOUCH_REMOVE
   * hover drag - msg1-n:TOUCH_HOVER (moving), msgn+1:TOUCH_REMOVE
   *
   * Widget support: Windows 8.0+, Winrt/Win32. Gonk supports CONTACT, REMOVE,
   * and CANCEL but no HOVER. Other widgets will throw.
   *
   * NOTE: The synthesized native event will be fired asynchronously, and upon
   * completion the observer, if provided, will be notified with a "touchpoint"
   * topic.
   *
   * @param aPointerId The touch point id to create or update.
   * @param aTouchState one or more of the touch states listed above
   * @param aScreenX, aScreenY screen coords of this event
   * @param aPressure 0.0 -> 1.0 float val indicating pressure
   * @param aOrientation 0 -> 359 degree value indicating the
   * orientation of the pointer. Use 90 for normal taps.
   */
  void sendNativeTouchPoint(in unsigned long aPointerId,
                            in unsigned long aTouchState,
                            in long aScreenX,
                            in long aScreenY,
                            in double aPressure,
                            in unsigned long aOrientation,
                            [optional] in nsIObserver aObserver);

  /**
   * Simulates native touch based taps on the input digitizer. Events
   * triggered by this call are injected at the os level. Events do not
   * bypass widget level input processing and as such can be used to
   * test widget event logic and async pan-zoom controller functionality.
   * Cannot be accessed from an unprivileged context.
   *
   * Long taps (based on the aLongTap parameter) will be completed
   * asynchrnously after the call returns. Long tap delay is based on
   * the ui.click_hold_context_menus.delay pref or 1500 msec if pref
   * is not set.
   *
   * Widget support: Windows 8.0+, Winrt/Win32. Other widgets will
   * throw.
   *
   * NOTE: The synthesized native event will be fired asynchronously, and upon
   * completion the observer, if provided, will be notified, with a "touchtap"
   * topic.
   *
   * @param aScreenX, aScreenY screen coords of this event
   * @param aLongTap true if the tap should be long, false for a short
   * tap.
   */
  void sendNativeTouchTap(in long aScreenX,
                          in long aScreenY,
                          in boolean aLongTap,
                          [optional] in nsIObserver aObserver);

  /**
   * Cancel any existing touch points or long tap delays. Calling this is safe
   * even if you're sure there aren't any pointers recorded. You should call
   * this when tests shut down to reset the digitizer driver. Not doing so can
   * leave the digitizer in an undetermined state which can screw up subsequent
   * tests and native input.
   *
   * NOTE: The synthesized native event will be fired asynchronously, and upon
   * completion the observer, if provided, will be notified with a "cleartouch"
   * topic.
   */
  void clearNativeTouchSequence([optional] in nsIObserver aObserver);

  /**
   * See nsIWidget::ActivateNativeMenuItemAt
   *
   * Cannot be accessed from unprivileged context (not content-accessible)
   * Will throw a DOM security error if called without chrome privileges.
   */
  void activateNativeMenuItemAt(in AString indexString);

  /**
   * See nsIWidget::ForceUpdateNativeMenuAt
   *
   * Cannot be accessed from unprivileged context (not content-accessible)
   * Will throw a DOM security error if called without chrome privileges.
   */
  void forceUpdateNativeMenuAt(in AString indexString);

  /**
   * Returns the current selection as plaintext. Note that the result may be
   * different from the result of sendQueryContentEvent(QUERY_SELECTED_TEXT).
   * This result is computed by native API with transferable data. In other
   * words, when the OS treats the selection as plaintext, it treats current
   * selection as this result.
   */
  AString GetSelectionAsPlaintext();

  /**
   * Focus the element aElement. The element should be in the same document
   * that the window is displaying. Pass null to blur the element, if any,
   * that currently has focus, and focus the document.
   *
   * Cannot be accessed from unprivileged context (not content-accessible)
   * Will throw a DOM security error if called without chrome privileges.
   *
   * @param aElement the element to focus
   *
   * Do not use this method. Just use element.focus if available or
   * nsIFocusManager::SetFocus instead.
   *
   */
  void focus(in nsIDOMElement aElement);

  /**
   * Force a garbage collection followed by a cycle collection.
   *
   * Will throw a DOM security error if called without chrome privileges in
   * non-debug builds. Available to all callers in debug builds.
   *
   * @param aListener listener that receives information about the CC graph
   *                  (see @mozilla.org/cycle-collector-logger;1 for a logger
   *                   component)
   * @param aExtraForgetSkippableCalls indicates how many times
   *                                   nsCycleCollector_forgetSkippable will
   *                                   be called before running cycle collection.
   *                                   -1 prevents the default
   *                                   nsCycleCollector_forgetSkippable call
   *                                   which happens after garbage collection.
   */
  void garbageCollect([optional] in nsICycleCollectorListener aListener,
                      [optional] in long aExtraForgetSkippableCalls);

  /**
   * Force a cycle collection without garbage collection.
   *
   * Will throw a DOM security error if called without chrome privileges in
   * non-debug builds. Available to all callers in debug builds.
   *
   * @param aListener listener that receives information about the CC graph
   *                  (see @mozilla.org/cycle-collector-logger;1 for a logger
   *                   component)
   * @param aExtraForgetSkippableCalls indicates how many times
   *                                   nsCycleCollector_forgetSkippable will
   *                                   be called before running cycle collection.
   *                                   -1 prevents the default
   *                                   nsCycleCollector_forgetSkippable call
   *                                   which happens after garbage collection.
   */
  void cycleCollect([optional] in nsICycleCollectorListener aListener,
                    [optional] in long aExtraForgetSkippableCalls);

  /**
   * Trigger whichever GC or CC timer is currently active and waiting to fire.
   * Don't do this too much for initiating heavy actions, like the start of a IGC.
   */
  void runNextCollectorTimer();

  /** Synthesize a simple gesture event for a window. The event types
   *  supported are: MozSwipeGestureMayStart, MozSwipeGestureStart,
   *  MozSwipeGestureUpdate, MozSwipeGestureEnd, MozSwipeGesture,
   *  MozMagnifyGestureStart, MozMagnifyGestureUpdate, MozMagnifyGesture,
   *  MozRotateGestureStart, MozRotateGestureUpdate, MozRotateGesture,
   *  MozPressTapGesture, MozTapGesture, and MozEdgeUIGesture.
   *
   * Cannot be accessed from unprivileged context (not
   * content-accessible) Will throw a DOM security error if called
   * without chrome privileges.
   *
   * @param aType event type
   * @param aX x offset in CSS pixels
   * @param aY y offset in CSS pixels
   * @param aDirection direction, using constants defined in nsIDOMSimpleGestureEvent
   * @param aDelta  amount of magnification or rotation for magnify and rotation events
   * @param aModifiers modifiers pressed, using constants defined in nsIDOMNSEvent
   * @param aClickCount For tap gestures, the number of taps.
   */
  void sendSimpleGestureEvent(in AString aType,
                              in float aX,
                              in float aY,
                              in unsigned long aDirection,
                              in double aDelta,
                              in long aModifiers,
                              [optional] in unsigned long aClickCount);

  /**
   * Retrieve the element at point aX, aY in the window's document.
   *
   * @param aIgnoreRootScrollFrame whether or not to ignore the root scroll
   *        frame when retrieving the element. If false, this method returns
   *        null for coordinates outside of the viewport.
   * @param aFlushLayout flushes layout if true. Otherwise, no flush occurs.
   */
  nsIDOMElement elementFromPoint(in float aX,
                                 in float aY,
                                 in boolean aIgnoreRootScrollFrame,
                                 in boolean aFlushLayout);

  /**
   * Retrieve all nodes that intersect a rect in the window's document.
   *
   * @param aX x reference for the rectangle in CSS pixels
   * @param aY y reference for the rectangle in CSS pixels
   * @param aTopSize How much to expand up the rectangle
   * @param aRightSize How much to expand right the rectangle
   * @param aBottomSize How much to expand down the rectangle
   * @param aLeftSize How much to expand left the rectangle
   * @param aIgnoreRootScrollFrame whether or not to ignore the root scroll
   *        frame when retrieving the element. If false, this method returns
   *        null for coordinates outside of the viewport.
   * @param aFlushLayout flushes layout if true. Otherwise, no flush occurs.
   */
  nsIDOMNodeList nodesFromRect(in float aX,
                               in float aY,
                               in float aTopSize, 
                               in float aRightSize,
                               in float aBottomSize,
                               in float aLeftSize,
                               in boolean aIgnoreRootScrollFrame,
                               in boolean aFlushLayout);


  /**
   * Get a list of nodes that have meaningful textual content to
   * be translated. The implementation of this algorithm is in flux
   * as we experiment and refine which approach works best.
   *
   * This method requires chrome privileges.
   */
  nsITranslationNodeList getTranslationNodes(in nsIDOMNode aRoot);

  /**
   * Compare the two canvases, returning the number of differing pixels and
   * the maximum difference in a channel.  This will throw an error if
   * the dimensions of the two canvases are different.
   *
   * This method requires chrome privileges.
   */
  uint32_t compareCanvases(in nsIDOMHTMLCanvasElement aCanvas1,
                           in nsIDOMHTMLCanvasElement aCanvas2,
                           out unsigned long aMaxDifference);

  /**
   * Returns true if a MozAfterPaint event has been queued but not yet
   * fired.
   */
  readonly attribute boolean isMozAfterPaintPending;

  /**
   * Suppresses/unsuppresses user initiated event handling in window's document
   * and subdocuments.
   *
   * @throw NS_ERROR_DOM_SECURITY_ERR if called without chrome privileges and
   *        NS_ERROR_FAILURE if window doesn't have a document.
   */
  void suppressEventHandling(in boolean aSuppress);

  void clearMozAfterPaintEvents();

  /**
   * Disable or enable non synthetic test mouse events on *all* windows.
   *
   * Cannot be accessed from unprivileged context (not content-accessible).
   * Will throw a DOM security error if called without chrome privileges.
   *
   * @param aDisable  If true, disable all non synthetic test mouse events
   *               on all windows.  Otherwise, enable them.
   */
  void disableNonTestMouseEvents(in boolean aDisable);

  /**
   * Returns the scroll position of the window's currently loaded document.
   *
   * @param aFlushLayout flushes layout if true. Otherwise, no flush occurs.
   * @see nsIDOMWindow::scrollX/Y
   */
  void getScrollXY(in boolean aFlushLayout, out long aScrollX, out long aScrollY);

  /**
   * Returns the scroll position of the window's currently loaded document.
   *
   * @param aFlushLayout flushes layout if true. Otherwise, no flush occurs.
   * @see nsIDOMWindow::scrollX/Y
   */
  void getScrollXYFloat(in boolean aFlushLayout, out float aScrollX, out float aScrollY);

  /**
   * Returns the scrollbar width of the window's scroll frame.
   *
   * @param aFlushLayout flushes layout if true. Otherwise, no flush occurs.
   */
  void getScrollbarSize(in boolean aFlushLayout, out long aWidth, out long aHeight);

  /**
   * Returns the given element's bounds without flushing pending layout changes.
   */
  nsIDOMClientRect getBoundsWithoutFlushing(in nsIDOMElement aElement);

  /**
   * Returns the bounds of the window's currently loaded document. This will
   * generally be (0, 0, pageWidth, pageHeight) but in some cases (e.g. RTL
   * documents) may have a negative left value.
   */
  nsIDOMClientRect getRootBounds();

  /**
   * Get IME open state. TRUE means 'Open', otherwise, 'Close'.
   * This property works only when IMEEnabled is IME_STATUS_ENABLED.
   */
  readonly attribute boolean IMEIsOpen;

  /**
   * WARNING: These values must be same as nsIWidget's values.
   */

  /**
   * DISABLED means users cannot use IME completely.
   * Note that this state is *not* same as |ime-mode: disabled;|.
   */
  const unsigned long IME_STATUS_DISABLED = 0;

  /**
   * ENABLED means users can use all functions of IME. This state is same as
   * |ime-mode: normal;|.
   */
  const unsigned long IME_STATUS_ENABLED  = 1;

  /**
   * PASSWORD means users cannot use most functions of IME. But on GTK2,
   * users can use "Simple IM" which only supports dead key inputting.
   * The behavior is same as the behavior of the native password field.
   * This state is same as |ime-mode: disabled;|.
   */
  const unsigned long IME_STATUS_PASSWORD = 2;

  /**
   * PLUGIN means a plug-in has focus. At this time we should not touch to
   * controlling the IME state.
   */
  const unsigned long IME_STATUS_PLUGIN   = 3;

  /**
   * Get IME status, see above IME_STATUS_* definitions.
   */
  readonly attribute unsigned long IMEStatus;

  /**
   * Get the number of screen pixels per CSS pixel.
   */
  readonly attribute float screenPixelsPerCSSPixel;

  /**
   * Get the current zoom factor.
   * This is _approximately_ the same as nsIContentViewer.fullZoom,
   * but takes into account Gecko's quantization of the zoom factor, which is
   * implemented by adjusting the (integer) number of appUnits per devPixel.
   */
  readonly attribute float fullZoom;

  /**
   * Dispatches aEvent via the nsIPresShell object of the window's document.
   * The event is dispatched to aTarget, which should be an object
   * which implements nsIContent interface (#element, #text, etc).
   *
   * Cannot be accessed from unprivileged context (not
   * content-accessible) Will throw a DOM security error if called
   * without chrome privileges.
   *
   * @note Event handlers won't get aEvent as parameter, but a similar event.
   *       Also, aEvent should not be reused.
   */
  boolean dispatchDOMEventViaPresShell(in nsIDOMNode aTarget,
                                       in nsIDOMEvent aEvent,
                                       in boolean aTrusted);

  /**
   * Sets WidgetEvent::mFlags::mOnlyChromeDispatch to true to ensure that
   * the event is propagated only to chrome.
   * Event's .target property will be aTarget.
   * Returns the same value as what EventTarget.dispatchEvent does.
   */
  boolean dispatchEventToChromeOnly(in nsIDOMEventTarget aTarget,
                                    in nsIDOMEvent aEvent);

  /**
   * Returns the real classname (possibly of the mostly-transparent security
   * wrapper) of aObj.
   */
  [implicit_jscontext] string getClassName(in jsval aObject);

  /**
   * Generate a content command event.
   *
   * Cannot be accessed from unprivileged context (not content-accessible)
   * Will throw a DOM security error if called without chrome privileges.
   *
   * @param aType Type of command content event to send.  Can be one of "cut",
   *        "copy", "paste", "delete", "undo", "redo", or "pasteTransferable".
   * @param aTransferable an instance of nsITransferable when aType is
   *        "pasteTransferable"
   */
  void sendContentCommandEvent(in AString aType,
                               [optional] in nsITransferable aTransferable);

  /**
   * If sendQueryContentEvent()'s aAdditionalFlags argument is
   * QUERY_CONTENT_FLAG_USE_XP_LINE_BREAK, plain text generated from content
   * is created with "\n".
   * Otherwise, platform dependent.  E.g., on Windows, "\r\n" is used.
   * aOffset and aLength are offset and length in/of the plain text content.
   * This flag also affects the result values such as offset, length and string.
   */
  const unsigned long QUERY_CONTENT_FLAG_USE_NATIVE_LINE_BREAK = 0x0000;
  const unsigned long QUERY_CONTENT_FLAG_USE_XP_LINE_BREAK     = 0x0001;

  /**
   * sendQueryContentEvent()'s aAdditionalFlags may have one of following
   * flags when aType is QUERY_SELECTED_TEXT.  If one of them is set,
   * the result is the first range of the selection type.  See also
   * nsISelectionController::SELECTION_*.
   */
  const unsigned long QUERY_CONTENT_FLAG_SELECTION_SPELLCHECK          = 0x0002;
  const unsigned long QUERY_CONTENT_FLAG_SELECTION_IME_RAWINPUT        = 0x0004;
  const unsigned long QUERY_CONTENT_FLAG_SELECTION_IME_SELECTEDRAWTEXT = 0x0008;
  const unsigned long QUERY_CONTENT_FLAG_SELECTION_IME_CONVERTEDTEXT   = 0x0010;
  const unsigned long QUERY_CONTENT_FLAG_SELECTION_IME_SELECTEDCONVERTEDTEXT =
                                                                         0x0020;
  const unsigned long QUERY_CONTENT_FLAG_SELECTION_ACCESSIBILITY       = 0x0040;
  const unsigned long QUERY_CONTENT_FLAG_SELECTION_FIND                = 0x0080;
  const unsigned long QUERY_CONTENT_FLAG_SELECTION_URLSECONDARY        = 0x0100;
  const unsigned long QUERY_CONTENT_FLAG_SELECTION_URLSTRIKEOUT        = 0x0200;

  /**
   * One of sendQueryContentEvent()'s aAdditionalFlags.  If this is specified,
   * aOffset is relative to start of selection or composition.
   * Note that this is supported only when QUERY_CONTENT_FLAG_USE_XP_LINE_BREAK
   * is not specified for now.
   */
  const unsigned long QUERY_CONTENT_FLAG_OFFSET_RELATIVE_TO_INSERTION_POINT =
                                                                         0x0400;

  /**
   * Synthesize a query content event. Note that the result value returned here
   * is in LayoutDevice pixels rather than CSS pixels.
   *
   * @param aType  One of the following const values.  And see also each comment
   *               for the other parameters and the result.
   * @param aAdditionalFlags See the description of QUERY_CONTENT_FLAG_*.
   */
  nsIQueryContentEventResult sendQueryContentEvent(
                               in unsigned long aType,
                               in long long aOffset,
                               in unsigned long aLength,
                               in long aX,
                               in long aY,
                               [optional] in unsigned long aAdditionalFlags);

  /**
   * QUERY_SELECTED_TEXT queries the first selection range's information.
   *
   * @param aOffset   Not used.
   * @param aLength   Not used.
   * @param aX        Not used.
   * @param aY        Not used.
   *
   * @return offset, reversed and text properties of the result are available.
   */
  const unsigned long QUERY_SELECTED_TEXT                       = 3200;

  /**
   * QUERY_TEXT_CONTENT queries the text at the specified range.
   *
   * @param aOffset   The first character's offset.  0 is the first character.
   * @param aLength   The length of getting text.  If the aLength is too long,
   *                  the result text is shorter than this value.
   * @param aX        Not used.
   * @param aY        Not used.
   *
   * @return text property of the result is available.
   */
  const unsigned long QUERY_TEXT_CONTENT                        = 3201;

  /**
   * QUERY_CARET_RECT queries the (collapsed) caret rect of the offset.
   * If the actual caret is there at the specified offset, this returns the
   * actual caret rect.  Otherwise, this guesses the caret rect from the
   * metrics of the text.
   *
   * @param aOffset   The caret offset.  0 is the left side of the first
   *                  caracter in LTR text.
   * @param aLength   Not used.
   * @param aX        Not used.
   * @param aY        Not used.
   *
   * @return left, top, width and height properties of the result are available.
   *         The left and the top properties are offset in the client area of
   *         the DOM window.
   */
  const unsigned long QUERY_CARET_RECT                          = 3203;

  /**
   * QUERY_TEXT_RECT queries the specified text's rect.
   *
   * @param aOffset   The first character's offset.  0 is the first character.
   * @param aLength   The length of getting text.  If the aLength is too long,
   *                  the extra length is ignored.
   * @param aX        Not used.
   * @param aY        Not used.
   *
   * @return left, top, width and height properties of the result are available.
   *         The left and the top properties are offset in the client area of
   *         the DOM window.
   */
  const unsigned long QUERY_TEXT_RECT                           = 3204;

  /**
   * QUERY_TEXT_RECT queries the focused editor's rect.
   *
   * @param aOffset   Not used.
   * @param aLength   Not used.
   * @param aX        Not used.
   * @param aY        Not used.
   *
   * @return left, top, width and height properties of the result are available.
   */
  const unsigned long QUERY_EDITOR_RECT                         = 3205;

  /**
   * QUERY_CHARACTER_AT_POINT queries the character information at the
   * specified point.  The point is offset in the window.
   * NOTE: If there are some panels at the point, this method send the query
   * event to the panel's widget automatically.
   *
   * @param aOffset   Not used.
   * @param aLength   Not used.
   * @param aX        X offset in the widget.
   * @param aY        Y offset in the widget.
   *
   * @return offset, notFound, left, top, width and height properties of the
   *         result are available.
   */
  const unsigned long QUERY_CHARACTER_AT_POINT                  = 3208;

  /**
   * QUERY_TEXT_RECT_ARRAY queries the rects per character
   *
   * @param aOffset   The first character's offset.  0 is the first character.
   * @param aLength   The length of getting text.  If the aLength is too long,
   *                  the extra length is ignored.
   * @param aX        Not used.
   * @param aY        Not used.
   */
  const unsigned long QUERY_TEXT_RECT_ARRAY                     = 3209;

  /**
   * Called when the remote child frame has changed its fullscreen state,
   * when entering fullscreen, and when the origin which is fullscreen changes.
   * aFrameElement is the iframe element which contains the child-process
   * fullscreen document.
   */
  void remoteFrameFullscreenChanged(in nsIDOMElement aFrameElement);

  /**
   * Called when the remote frame has popped all fullscreen elements off its
   * stack, so that the operation can complete on the parent side.
   */
  void remoteFrameFullscreenReverted();

  /**
   * Calls the document to handle any pending fullscreen requests.
   * It is called when the parent document has entered fullscreen, and
   * we want to put the current document into fullscreen as well.
   * The return value indicates whether there is any fullscreen request
   * handled by this call.
   */
  boolean handleFullscreenRequests();

  /**
   * Called when the child frame has fully exit fullscreen, so that the parent
   * process can also fully exit.
   */
  void exitFullscreen();

  /**
   * If sendQueryContentEvent()'s aAdditionalFlags argument is
   * SELECTION_SET_FLAG_USE_NATIVE_LINE_BREAK, aOffset and aLength are offset
   * and length in/of plain text generated from content is created with "\n".
   * Otherwise, platform dependent.  E.g., on Windows, "\r\n" is used.
   */
  const unsigned long SELECTION_SET_FLAG_USE_NATIVE_LINE_BREAK = 0x0000;
  const unsigned long SELECTION_SET_FLAG_USE_XP_LINE_BREAK     = 0x0001;

  /**
   * If SELECTION_SET_FLAG_REVERSE is set, the selection is set from
   * |aOffset + aLength| to |aOffset|.  Otherwise, it's set from |aOffset| to
   * |aOffset + aLength|.
   */
  const unsigned long SELECTION_SET_FLAG_REVERSE               = 0x0002;

  /**
   * Synthesize a selection set event to the window.
   *
   * This sets the selection as the specified information.
   *
   * @param aOffset  The caret offset of the selection start.
   * @param aLength  The length of the selection.  If this is too long, the
   *                 extra length is ignored.
   * @param aAdditionalFlags See the description of SELECTION_SET_FLAG_*.
   * @return True, if succeeded.  Otherwise, false.
   */
  boolean sendSelectionSetEvent(in unsigned long aOffset,
                                in unsigned long aLength,
                                [optional] in unsigned long aAdditionalFlags);

  /* Selection behaviors - mirror nsIFrame's nsSelectionAmount constants */
  const unsigned long SELECT_CHARACTER   = 0;
  const unsigned long SELECT_CLUSTER     = 1;
  const unsigned long SELECT_WORD        = 2;
  const unsigned long SELECT_LINE        = 3;
  const unsigned long SELECT_BEGINLINE   = 4;
  const unsigned long SELECT_ENDLINE     = 5;
  const unsigned long SELECT_PARAGRAPH   = 6;
  const unsigned long SELECT_WORDNOSPACE = 7;

  /**
   * Select content at a client point based on a selection behavior if the
   * underlying content is selectable. Selection will accumulate with any
   * existing selection, callers should clear selection prior if needed.
   * May fire selection changed events. Calls nsFrame's SelectByTypeAtPoint.
   *
   * @param aX, aY The selection point in client coordinates.
   * @param aSelectType The selection behavior requested.
   * @return True if a selection occured, false otherwise.
   * @throw NS_ERROR_DOM_SECURITY_ERR, NS_ERROR_UNEXPECTED for utils
   * issues, and NS_ERROR_INVALID_ARG for coordinates that are outside
   * this window.
   */
  boolean selectAtPoint(in float aX,
                        in float aY,
                        in unsigned long aSelectBehavior);

  /**
   * Perform the equivalent of:
   *   window.getComputedStyle(aElement, aPseudoElement).
   *     getPropertyValue(aPropertyName)
   * except that, when the link whose presence in history is allowed to
   * influence aElement's style is visited, get the value the property
   * would have if allowed all properties to change as a result of
   * :visited selectors (except for cases where getComputedStyle uses
   * data from the frame).
   *
   * This is easier to implement than adding our property restrictions
   * to this API, and is sufficient for the present testing
   * requirements (which are essentially testing 'color').
   */
  AString getVisitedDependentComputedStyle(in nsIDOMElement aElement,
                                           in AString aPseudoElement,
                                           in AString aPropertyName);

  /**
   * Get the id of the outer window of this window.  This will never throw.
   */
  readonly attribute unsigned long long outerWindowID;

  /**
   * Get the id of the current inner window of this window.  If there
   * is no current inner window, throws NS_ERROR_NOT_AVAILABLE.
   */
  readonly attribute unsigned long long currentInnerWindowID;

  /**
   * Put the window into a state where scripts are frozen and events
   * suppressed, for use when the window has launched a modal prompt.
   */
  void enterModalState();

  /**
   * Resume normal window state, where scripts can run and events are
   * delivered.
   */
  void leaveModalState();

  /**
   * Is the window is in a modal state? [See enterModalState()]
   */
  [noscript] boolean isInModalState();

  /**
   * Request set internal desktopMode flag change.
   */
  void setDesktopModeViewport(in boolean aDesktopModeViewport);

  /**
   * Suspend/resume timeouts on this window and its descendant windows.
   */
  void suspendTimeouts();
  void resumeTimeouts();

  /**
   * What type of layer manager the widget associated with this window is
   * using. "Basic" is unaccelerated; other types are accelerated. Throws an
   * error if there is no widget associated with this window.
   */
  readonly attribute AString layerManagerType;
  
  /**
   * True if the layer manager for the widget associated with this window is
   * forwarding layers to a remote compositor, false otherwise. Throws an
   * error if there is no widget associated with this window.
   */
  readonly attribute boolean layerManagerRemote;

  /**
   * Returns a Promise that will be resolved with a string once the capabilities
   * of the h264 decoder have been determined.
   * Success does not mean that all h264 video decoding will be done
   * in hardware.
   */
  readonly attribute jsval supportsHardwareH264Decoding;

  /**
   * Returns the current audio backend as a free-form string.
   */
  readonly attribute AString currentAudioBackend;

  /**
   * Record (and return) frame-intervals for frames which were presented
   *   between calling StartFrameTimeRecording and StopFrameTimeRecording.
   *
   * - Uses a cyclic buffer and serves concurrent consumers, so if Stop is called too late
   *     (elements were overwritten since Start), result is considered invalid and hence empty.
   * - Buffer is capable of holding 10 seconds @ 60fps (or more if frames were less frequent).
   *     Can be changed (up to 1 hour) via pref: toolkit.framesRecording.bufferSize.
   * - Note: the first frame-interval may be longer than expected because last frame
   *     might have been presented some time before calling StartFrameTimeRecording.
   */

  /**
   * Returns a handle which represents current recording start position.
   */
  void startFrameTimeRecording([retval] out unsigned long startIndex);

  /**
   * Returns number of recorded frames since startIndex was issued,
   *   and allocates+populates 2 arraye with the recorded data.
   * - Allocation is infallible. Should be released even if size is 0.
   */
  void stopFrameTimeRecording(in unsigned long startIndex,
                             [optional] out unsigned long frameCount,
                             [retval, array, size_is(frameCount)] out float frameIntervals);

  /**
   * Signals that we're begining to tab switch. This is used by painting code to
   * determine total tab switch time.
   */
  void beginTabSwitch();

  /**
   * The DPI of the display
   */
  readonly attribute float displayDPI;

  /**
   * Return the outer window with the given ID, if any.  Can return null.
   * @deprecated Use nsIWindowMediator.getOuterWindowWithId.  See bug 865664.
   */
  nsIDOMWindow getOuterWindowWithId(in unsigned long long aOuterWindowID);

  /**
   * Return this window's frame element.
   * Ignores all chrome/content or mozbrowser boundaries.
   */
  readonly attribute nsIDOMElement containerElement;

  [noscript] void RenderDocument(in nsConstRect aRect,
                                 in uint32_t aFlags,
                                 in nscolor aBackgroundColor,
                                 in gfxContext aThebesContext);

  /**
   * advanceTimeAndRefresh allows the caller to take over the refresh
   * driver timing for a window.  A call to advanceTimeAndRefresh does
   * three things:
   *  (1) It marks the refresh driver for this presentation so that it
   *      no longer refreshes on its own, but is instead driven entirely
   *      by the caller (except for the refresh that happens when a
   *      document comes out of the bfcache).
   *  (2) It advances the refresh driver's current refresh time by the
   *      argument given.  Negative advances are permitted.
   *  (3) It does a refresh (i.e., notifies refresh observers) at that
   *      new time.
   *
   * Note that this affects other connected docshells of the same type
   * in the same docshell tree, such as parent frames.
   *
   * When callers have completed their use of advanceTimeAndRefresh,
   * they must call restoreNormalRefresh.
   */
  void advanceTimeAndRefresh(in long long aMilliseconds);

  /**
   * Undoes the effects of advanceTimeAndRefresh.
   */
  void restoreNormalRefresh();

  /**
   * Reports whether the current state is test-controlled refreshes
   * (see advanceTimeAndRefresh and restoreNormalRefresh above).
   */
  readonly attribute bool isTestControllingRefreshes;

  /**
   * Reports whether APZ is enabled on the widget that this window is attached
   * to. If there is no widget it will report the default platform value of
   * whether or not APZ is enabled.
   */
  readonly attribute bool asyncPanZoomEnabled;

  /**
   * Set async scroll offset on an element. The next composite will render
   * with that offset if async scrolling is enabled, and then the offset
   * will be removed. Only call this while test-controlled refreshes is enabled.
   */
  void setAsyncScrollOffset(in nsIDOMNode aNode, in float aX, in float aY);

  /**
   * Set async zoom value. aRootElement should be the document element of our
   * document. The next composite will render with that zoom added to any
   * existing zoom if async scrolling is enabled, and then the zoom will be
   * removed. Only call this while test-controlled refreshes is enabled.
   */
  void setAsyncZoom(in nsIDOMNode aRootElement, in float aValue);

  /**
   * Do a round-trip to the compositor to ensure any pending APZ repaint requests
   * get flushed to the main thread. If the function returns true, the flush was
   * triggered and an "apz-repaints-flushed" notification will be dispatched via
   * the observer service once the flush is complete. If the function returns
   * false, an error occurred or a flush is not needed, and the notification
   * will not fire. This is intended to be used by test code only!
   */
  bool flushApzRepaints();

  /**
   * Ask APZ to pan and zoom to the focused input element.
   */
  void zoomToFocusedInput();

  /**
   * Method for testing StyleAnimationValue::ComputeDistance.
   *
   * Returns the distance between the two values as reported by
   * StyleAnimationValue::ComputeDistance for the given element and
   * property.
   */
  double computeAnimationDistance(in nsIDOMElement element,
                                  in AString property,
                                  in AString value1,
                                  in AString value2);

  /**
   * Wrap an nsIFile in an DOM File
   * Returns a File object.
   */
  nsISupports wrapDOMFile(in nsIFile aFile);

  /**
   * Get the type of the currently focused html input, if any.
   */
  readonly attribute string focusedInputType;

  /**
   * Find the view ID for a given element. This is the reverse of
   * findElementWithViewId().
   */
  nsViewID getViewId(in nsIDOMElement aElement);

  /**
   * Checks the layer tree for this window and returns true
   * if all layers have transforms that are translations by integers,
   * no leaf layers overlap, and the union of the leaf layers is exactly
   * the bounds of the window. Always returns true in non-DEBUG builds.
   */
  boolean leafLayersPartitionWindow();
 
  /**
   * Check if any PaintedLayer painting has been done for this element,
   * clears the painted flags if they have.
   */
  boolean checkAndClearPaintedState(in nsIDOMElement aElement);

  /**
   * Check whether all display items of the primary frame of aElement have been
   * assigned to the same single PaintedLayer in the last paint. If that is the
   * case, returns whether that PaintedLayer is opaque; if it's not the case, an
   * exception is thrown.
   */
  boolean isPartOfOpaqueLayer(in nsIDOMElement aElement);

  /**
   * Count the number of different PaintedLayers that the supplied elements have
   * been assigned to in the last paint. Throws an exception if any of the
   * elements doesn't have a primary frame, or if that frame's display items are
   * assigned to any other layers than just a single PaintedLayer per element.
   */
  unsigned long numberOfAssignedPaintedLayers([array, size_is(count)] in nsIDOMElement aElements,
                                              in uint32_t count);

  /**
   * Get internal id of the stored blob, file or file handle.
   */
  [implicit_jscontext] long long getFileId(in jsval aFile);

  /**
   * Get internal file path of the stored file or file handle.
   *
   * TODO: File handle objects are actually not supported at the moment.
   */
  [implicit_jscontext] AString getFilePath(in jsval aFile);

  /**
   * Get file ref count info for given database and file id.
   *
   */
  [implicit_jscontext]
  boolean getFileReferences(in AString aDatabaseName, in long long aId,
                            [optional] in jsval aOptions,
                            [optional] out long aRefCnt,
                            [optional] out long aDBRefCnt,
                            [optional] out long aSliceRefCnt);

  void flushPendingFileDeletions();

  /**
   * Return whether incremental GC has been disabled due to a binary add-on.
   */
  [implicit_jscontext]
  boolean isIncrementalGCEnabled();

  /**
   * Begin opcode-level profiling of all JavaScript execution in the window's
   * runtime.
   */
  [implicit_jscontext]
  void startPCCountProfiling();

  /**
   * Stop opcode-level profiling of JavaScript execution in the runtime, and
   * collect all counts for use by getPCCount methods.
   */
  [implicit_jscontext]
  void stopPCCountProfiling();

  /**
   * Purge collected PC counters.
   */
  [implicit_jscontext]
  void purgePCCounts();

  /**
   * Get the number of scripts with opcode-level profiling information.
   */
  [implicit_jscontext]
  long getPCCountScriptCount();

  /**
   * Get a JSON string for a short summary of a script and the PC counts
   * accumulated for it.
   */
  [implicit_jscontext]
  AString getPCCountScriptSummary(in long script);

  /**
   * Get a JSON string with full information about a profiled script,
   * including the decompilation of the script and placement of decompiled
   * operations within it, and PC counts for each operation.
   */
  [implicit_jscontext]
  AString getPCCountScriptContents(in long script);

  /**
   * Returns true if painting is suppressed for this window and false
   * otherwise.
   */
  readonly attribute boolean paintingSuppressed;

  /**
   * Returns an array of plugins on the page for opt-in activation.
   *
   * Cannot be accessed from unprivileged context (not content-accessible).
   * Will throw a DOM security error if called without chrome privileges.
   *
   */
  [implicit_jscontext]
  readonly attribute jsval plugins;

  /**
   * Set the scrollport size for the purposes of clamping scroll positions for
   * the root scroll frame of this document to be (aWidth,aHeight) in CSS pixels.
   *
   * The caller of this method must have chrome privileges.
   */
  void setScrollPositionClampingScrollPortSize(in float aWidth, in float aHeight);

  /**
   * These are used to control whether dialogs (alert, prompt, confirm) are
   * allowed.
   */
  void disableDialogs();
  void enableDialogs();
  bool areDialogsEnabled();

  const unsigned long AGENT_SHEET = 0;
  const unsigned long USER_SHEET = 1;
  const unsigned long AUTHOR_SHEET = 2;
  /**
   * Synchronously loads a style sheet from |sheetURI| and adds it to the list
   * of additional style sheets of the document.
   *
   * These additional style sheets are very much like user/agent sheets loaded 
   * with loadAndRegisterSheet. The only difference is that they are applied only
   * on the document owned by this window.
   *
   * Sheets added via this API take effect immediately on the document.
   */
  void loadSheet(in nsIURI sheetURI, in unsigned long type);

  /**
   * Same as the above method but allows passing the URI as a string.
   */
  void loadSheetUsingURIString(in ACString sheetURI, in unsigned long type);

  /**
   * Adds a style sheet to the list of additional style sheets of the document.
   *
   * Style sheets can be preloaded with nsIStyleSheetService.preloadSheet.
   *
   * Sheets added via this API take effect immediately on the document.
   */
  void addSheet(in nsIDOMStyleSheet sheet, in unsigned long type);

  /**
   * Remove the document style sheet at |sheetURI| from the list of additional 
   * style sheets of the document.  The removal takes effect immediately.
   */
  void removeSheet(in nsIURI sheetURI, in unsigned long type);

  /**
   * Same as the above method but allows passing the URI as a string.
   */
  void removeSheetUsingURIString(in ACString sheetURI, in unsigned long type);

  /**
   * Returns true if a user input is being handled.
   *
   * This calls EventStateManager::IsHandlingUserInput().
   */
  readonly attribute boolean isHandlingUserInput;

  /**
   * Returns milliseconds elapsed since last user input was started
   *
   * This relies on EventStateManager::LatestUserInputStart()
   */
  readonly attribute double millisSinceLastUserInput;

  /**
   * After calling the method, the window for which this DOMWindowUtils
   * was created can be closed using scripts.
   */
  void allowScriptsToClose();

  /**
   * Is the parent window's main widget visible?  If it isn't, we probably
   * don't want to display any dialogs etc it may request.  This corresponds
   * to the visibility check in nsWindowWatcher::OpenWindowInternal().
   *
   * Will throw a DOM security error if called without chrome privileges or
   * NS_ERROR_NOT_AVAILABLE in the unlikely event that the parent window's
   * main widget can't be reached.
   */
  readonly attribute boolean isParentWindowMainWidgetVisible;

  /**
   * In certain cases the event handling of nodes, form controls in practice,
   * may be disabled. Such cases are for example the existence of disabled
   * attribute or -moz-user-input: none.
   */
  boolean isNodeDisabledForEvents(in nsIDOMNode aNode);

  /**
   * Setting paintFlashing to true will flash newly painted area.
   */
  attribute boolean paintFlashing;

  /*
   * Returns the value of a given property animated on the compositor thread.
   * If the property is NOT currently being animated on the compositor thread,
   * returns an empty string.
   */
  AString getOMTAStyle(in nsIDOMElement aElement, in AString aProperty,
                       [optional] in AString aPseudoElement);

  /**
   * Special function that gets a property syncronously from the last composite
   * that occured.
   *
   * Supported properties:
   *   "overdraw": Report a percentage between 0 and 999 indicate how many times
   *               each pixels on the destination window have been touched.
   *   "missed_hwc": Report a bool if hardware composer is supported but was
   *                 not used for the last frame.
   */
  float requestCompositorProperty(in AString aProperty);

  /**
   * If aHandlingInput is true, this informs the event state manager that
   * we're handling user input. Otherwise, this is a no-op (as by default
   * we're not handling user input).
   * Remember to call destruct() on the return value!
   * See also nsIDOMWindowUtils::isHandlingUserInput.
   */
  nsIJSRAIIHelper setHandlingUserInput(in boolean aHandlingInput);

  /**
   * Get the content- and compositor-side APZ test data instances.
   * The return values are of type APZTestData (see APZTestData.webidl).
   */
  [implicit_jscontext] jsval getContentAPZTestData();
  [implicit_jscontext] jsval getCompositorAPZTestData();

  /**
   * Posts an eRestyle_Self restyle event for the given element.
   */
  void postRestyleSelfEvent(in nsIDOMElement aElement);

  /**
   * Used to pause or resume all media in this window. Use-cases are audio
   * competing, remote media control and to prevent auto-playing media.
   */
  attribute uint32_t mediaSuspend;

  /**
   * With this it's possible to mute all the MediaElements in this window.
   * We have audioMuted and audioVolume to preserve the volume across
   * mute/umute.
   */
  attribute boolean audioMuted;

  /**
   * range: greater or equal to 0. The real volume level is affected by the
   * volume of all ancestor windows.
   */
  attribute float audioVolume;

  /**
   * This method doesn't do anything useful.  It was solely added for the
   * purpose of the test for bug 503926.
   */
  void xpconnectArgument(in nsIDOMWindowUtils aThis);

  /**
   * Helper for JS components that need to send permission requests with
   * e10s support properly.
   */
  void askPermission(in nsIContentPermissionRequest aRequest);

  /**
   * Number of elements restyled for the curent document.
   *
   * Note that during a restyle operation we may restyle an element more
   * than once (e.g., for an inline that contains blocks).  This also
   * counts restyling of pseudo-elements and anonymous boxes.
   *
   * May throw NS_ERROR_NOT_AVAILABLE.
   */
  readonly attribute unsigned long long elementsRestyled;

  /**
   * Number of frames constructed (excluding breaking) for the curent
   * document.
   *
   * May throw NS_ERROR_NOT_AVAILABLE.
   */
  readonly attribute unsigned long long framesConstructed;

  /**
   * Number of frames reflowed for the curent document.
   *
   * May throw NS_ERROR_NOT_AVAILABLE.
   */
  readonly attribute unsigned long long framesReflowed;

  /**
   * Controls the amount of chrome that should be visible on each side of
   * the window. Works like the chromemargin xul:window attribute.
   * This should only be used with non-XUL windows.
   */
  void setChromeMargin(in int32_t aTop,
                       in int32_t aRight,
                       in int32_t aBottom,
                       in int32_t aLeft);

  /**
   * Enable some service workers testing features.
   */
  attribute boolean serviceWorkersTestingEnabled;

  /**
   * Returns a JSObject which contains a list of frame uniformities
   * when the pref gfx.vsync.collect-scroll-data is enabled.
   * Every result contains a layer address and a frame uniformity for that layer.
   * A negative frame uniformity value indicates an invalid frame uniformity and an error has occured.
   */
  [implicit_jscontext] jsval getFrameUniformityTestData();

  /*
   * Increase the chaos mode activation level. An equivalent number of
   * calls to leaveChaosMode must be made in order to restore the original
   * chaos mode state. If the activation level is nonzero all chaos mode
   * features are activated.
   */
  void enterChaosMode();

  /**
   * Decrease the chaos mode activation level. See enterChaosMode().
   */
  void leaveChaosMode();

  /**
   * Returns whether the document's style set's rule processor for the
   * specified level of the cascade is shared by multiple style sets.
   * (Used by tests to ensure that certain optimizations do not regress.)
   *
   * @param aSheetType One of the nsIStyleSheetService.*_SHEET constants.
   */
  bool hasRuleProcessorUsedByMultipleStyleSets(in unsigned long aSheetType);

  /*
   * Force the use counters for the node's associated document(s) to be
   * flushed to telemetry.  For example, a document node will flush its own
   * counters and an image node with an SVG source will flush the SVG
   * document's counters.  Normally, use counters are flushed to telemetry
   * upon document destruction, but as document destruction is somewhat
   * non-deterministic, we have this method here for more determinism when
   * running tests.
   */
  void forceUseCounterFlush(in nsIDOMNode aNode);

  void setNextPaintSyncId(in long aSyncId);

  /**
   * Enable or disable displayport suppression. This is intended to be used by
   * testing code, to provide more deterministic behaviour over the displayport
   * suppression during tests. Note that this updates a flag, so whatever value
   * was last provided is what will be used.
   */
  void respectDisplayPortSuppression(in boolean aEnabled);

  /**
   * Set a flag that forces the next reflow interrupt check to return true. This
   * can be used by tests to force execution of the interrupted reflow codepaths.
   */
  void forceReflowInterrupt();

  /**
   * Terminate the GPU process. Used for testing GPU process restarts.
   */
  void terminateGPUProcess();

  /**
    * Returns the GPU process pid, or -1 if there is no GPU process.
    */
  readonly attribute int32_t gpuProcessPid;

  const long MOUSE_BUTTONS_NO_BUTTON = 0x00;
  const long MOUSE_BUTTONS_LEFT_BUTTON = 0x01;
  const long MOUSE_BUTTONS_RIGHT_BUTTON = 0x02;
  const long MOUSE_BUTTONS_MIDDLE_BUTTON = 0x04;
  // Typically, "back" button being left side of 5-button
  // mice, see "buttons" attribute document of DOM3 Events.
  const long MOUSE_BUTTONS_4TH_BUTTON = 0x08;
  // Typically, "forward" button being right side of 5-button
  // mice, see "buttons" attribute document of DOM3 Events.
  const long MOUSE_BUTTONS_5TH_BUTTON = 0x10;
  // Buttons are not specified, will be calculated from |aButton|.
  const long MOUSE_BUTTONS_NOT_SPECIFIED = -1;
};

[scriptable, uuid(c694e359-7227-4392-a138-33c0cc1f15a6)]
interface nsITranslationNodeList : nsISupports {
  readonly attribute unsigned long length;
  nsIDOMNode item(in unsigned long index);

  // A translation root is a block element, or an inline element
  // which its parent is not a translation node.
  boolean isTranslationRootAtIndex(in unsigned long index);
};

/**
 * JS doesn't do RAII very well. We can use this interface to make remembering
 * to destruct an object in a finally clause easier.
 */
[scriptable, uuid(52e5a996-d0a9-4efc-a6fa-24489c532b19)]
interface nsIJSRAIIHelper : nsISupports {
  void destruct();
};