DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (5b81998bb7ab)

VCS Links

Line Code
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
/* -*- Mode: C++; 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/. */

#ifndef nsGUIEvent_h__
#define nsGUIEvent_h__

#include "nsCOMArray.h"
#include "nsPoint.h"
#include "nsRect.h"
#include "nsRegion.h"
#include "nsEvent.h"
#include "nsStringGlue.h"
#include "nsCOMPtr.h"
#include "nsIAtom.h"
#include "nsIDOMKeyEvent.h"
#include "nsIDOMMouseEvent.h"
#include "nsIDOMWheelEvent.h"
#include "nsIDOMDataTransfer.h"
#include "nsIDOMEventTarget.h"
#include "nsIDOMTouchEvent.h"
#include "nsWeakPtr.h"
#include "nsIWidget.h"
#include "nsTArray.h"
#include "nsTraceRefcnt.h"
#include "nsITransferable.h"
#include "nsIVariant.h"
#include "nsStyleConsts.h"
#include "nsAutoPtr.h"

namespace mozilla {
namespace dom {
  class PBrowserParent;
  class PBrowserChild;
}
namespace plugins {
  class PPluginInstanceChild;
}
}

class nsRenderingContext;
class nsIMenuItem;
class nsIContent;
class nsIURI;
class nsHashKey;

/**
 * Event Struct Types
 */
#define NS_EVENT                           1
#define NS_GUI_EVENT                       2
#define NS_SIZE_EVENT                      3
#define NS_SIZEMODE_EVENT                  4
#define NS_ZLEVEL_EVENT                    5
#define NS_PAINT_EVENT                     6
#define NS_SCROLLBAR_EVENT                 7
#define NS_INPUT_EVENT                     8
#define NS_KEY_EVENT                       9
#define NS_MOUSE_EVENT                    10
#define NS_SCRIPT_ERROR_EVENT             12
#define NS_TEXT_EVENT                     13
#define NS_COMPOSITION_EVENT              14
#define NS_MOUSE_SCROLL_EVENT             16
#define NS_SCROLLPORT_EVENT               18
#define NS_MUTATION_EVENT                 19 // |nsMutationEvent| in content
#define NS_FORM_EVENT                     21
#define NS_FOCUS_EVENT                    22
#define NS_POPUP_EVENT                    23
#define NS_COMMAND_EVENT                  24
#define NS_SCROLLAREA_EVENT               25
#define NS_TRANSITION_EVENT               26
#define NS_ANIMATION_EVENT                27

#define NS_UI_EVENT                       28
#define NS_SVG_EVENT                      30
#define NS_SVGZOOM_EVENT                  31
#define NS_SMIL_TIME_EVENT                32

#define NS_QUERY_CONTENT_EVENT            33

#define NS_DRAG_EVENT                     35
#define NS_NOTIFYPAINT_EVENT              36
#define NS_SIMPLE_GESTURE_EVENT           37
#define NS_SELECTION_EVENT                38
#define NS_CONTENT_COMMAND_EVENT          39
#define NS_GESTURENOTIFY_EVENT            40
#define NS_MOZTOUCH_EVENT                 42
#define NS_PLUGIN_EVENT                   43
#define NS_TOUCH_EVENT                    44
#define NS_WHEEL_EVENT                    45

// These flags are sort of a mess. They're sort of shared between event
// listener flags and event flags, but only some of them. You've been
// warned!
#define NS_EVENT_FLAG_NONE                0x0000
#define NS_EVENT_FLAG_TRUSTED             0x0001
#define NS_EVENT_FLAG_BUBBLE              0x0002
#define NS_EVENT_FLAG_CAPTURE             0x0004
#define NS_EVENT_FLAG_STOP_DISPATCH       0x0008
#define NS_EVENT_FLAG_NO_DEFAULT          0x0010
#define NS_EVENT_FLAG_CANT_CANCEL         0x0020
#define NS_EVENT_FLAG_CANT_BUBBLE         0x0040
#define NS_PRIV_EVENT_FLAG_SCRIPT         0x0080
#define NS_EVENT_FLAG_NO_CONTENT_DISPATCH 0x0100
#define NS_EVENT_FLAG_SYSTEM_EVENT        0x0200
// Event has been dispatched at least once
#define NS_EVENT_DISPATCHED               0x0400
#define NS_EVENT_FLAG_DISPATCHING         0x0800
// When an event is synthesized for testing, this flag will be set.
// Note that this is currently used only with mouse events, because this
// flag is not needed on other events now.  It could be added to other
// events.
#define NS_EVENT_FLAG_SYNTHETIC_TEST_EVENT 0x1000

// Use this flag if the event should be dispatched only to chrome.
#define NS_EVENT_FLAG_ONLY_CHROME_DISPATCH 0x2000

// A flag for drag&drop handling.
#define NS_EVENT_FLAG_NO_DEFAULT_CALLED_IN_CONTENT 0x4000

#define NS_PRIV_EVENT_UNTRUSTED_PERMITTED 0x8000

#define NS_EVENT_FLAG_EXCEPTION_THROWN    0x10000

#define NS_EVENT_FLAG_PREVENT_MULTIPLE_ACTIONS 0x20000

#define NS_EVENT_RETARGET_TO_NON_NATIVE_ANONYMOUS 0x40000

#define NS_EVENT_FLAG_STOP_DISPATCH_IMMEDIATELY 0x80000

#define NS_EVENT_FLAG_DONT_FORWARD_CROSS_PROCESS 0x100000

#define NS_EVENT_CAPTURE_MASK             (~(NS_EVENT_FLAG_BUBBLE | NS_EVENT_FLAG_NO_CONTENT_DISPATCH))
#define NS_EVENT_BUBBLE_MASK              (~(NS_EVENT_FLAG_CAPTURE | NS_EVENT_FLAG_NO_CONTENT_DISPATCH))

#define NS_EVENT_TYPE_NULL                   0

/**
 * GUI MESSAGES
 */
 //@{
#define NS_EVENT_NULL                   0


#define NS_WINDOW_START                 100

// Widget may be destroyed
#define NS_XUL_CLOSE                    (NS_WINDOW_START + 1)
// Key is pressed within a window
#define NS_KEY_PRESS                    (NS_WINDOW_START + 31)
// Key is released within a window
#define NS_KEY_UP                       (NS_WINDOW_START + 32)
// Key is pressed within a window
#define NS_KEY_DOWN                     (NS_WINDOW_START + 33)

#define NS_RESIZE_EVENT                 (NS_WINDOW_START + 60)
#define NS_SCROLL_EVENT                 (NS_WINDOW_START + 61)

// A plugin was clicked or otherwise focused. NS_PLUGIN_ACTIVATE should be
// used when the window is not active. NS_PLUGIN_FOCUS should be used when
// the window is active. In the latter case, the dispatcher of the event
// is expected to ensure that the plugin's widget is focused beforehand.
#define NS_PLUGIN_ACTIVATE               (NS_WINDOW_START + 62)
#define NS_PLUGIN_FOCUS                  (NS_WINDOW_START + 63)

#define NS_OFFLINE                       (NS_WINDOW_START + 64)
#define NS_ONLINE                        (NS_WINDOW_START + 65)

// Indicates a resize will occur
#define NS_BEFORERESIZE_EVENT            (NS_WINDOW_START + 66)

// Indicates that the user is either idle or active
#define NS_MOZ_USER_IDLE                 (NS_WINDOW_START + 67)
#define NS_MOZ_USER_ACTIVE               (NS_WINDOW_START + 68)

#define NS_MOUSE_MESSAGE_START          300
#define NS_MOUSE_MOVE                   (NS_MOUSE_MESSAGE_START)
#define NS_MOUSE_BUTTON_UP              (NS_MOUSE_MESSAGE_START + 1)
#define NS_MOUSE_BUTTON_DOWN            (NS_MOUSE_MESSAGE_START + 2)
#define NS_MOUSE_ENTER                  (NS_MOUSE_MESSAGE_START + 22)
#define NS_MOUSE_EXIT                   (NS_MOUSE_MESSAGE_START + 23)
#define NS_MOUSE_DOUBLECLICK            (NS_MOUSE_MESSAGE_START + 24)
#define NS_MOUSE_CLICK                  (NS_MOUSE_MESSAGE_START + 27)
#define NS_MOUSE_ACTIVATE               (NS_MOUSE_MESSAGE_START + 30)
#define NS_MOUSE_ENTER_SYNTH            (NS_MOUSE_MESSAGE_START + 31)
#define NS_MOUSE_EXIT_SYNTH             (NS_MOUSE_MESSAGE_START + 32)
#define NS_MOUSE_MOZHITTEST             (NS_MOUSE_MESSAGE_START + 33)
#define NS_MOUSEENTER                   (NS_MOUSE_MESSAGE_START + 34)
#define NS_MOUSELEAVE                   (NS_MOUSE_MESSAGE_START + 35)

#define NS_CONTEXTMENU_MESSAGE_START    500
#define NS_CONTEXTMENU                  (NS_CONTEXTMENU_MESSAGE_START)

#define NS_STREAM_EVENT_START           1100
#define NS_LOAD                         (NS_STREAM_EVENT_START)
#define NS_PAGE_UNLOAD                  (NS_STREAM_EVENT_START + 1)
#define NS_HASHCHANGE                   (NS_STREAM_EVENT_START + 2)
#define NS_IMAGE_ABORT                  (NS_STREAM_EVENT_START + 3)
#define NS_LOAD_ERROR                   (NS_STREAM_EVENT_START + 4)
#define NS_POPSTATE                     (NS_STREAM_EVENT_START + 5)
#define NS_BEFORE_PAGE_UNLOAD           (NS_STREAM_EVENT_START + 6)
#define NS_PAGE_RESTORE                 (NS_STREAM_EVENT_START + 7)
#define NS_READYSTATECHANGE             (NS_STREAM_EVENT_START + 8)
 
#define NS_FORM_EVENT_START             1200
#define NS_FORM_SUBMIT                  (NS_FORM_EVENT_START)
#define NS_FORM_RESET                   (NS_FORM_EVENT_START + 1)
#define NS_FORM_CHANGE                  (NS_FORM_EVENT_START + 2)
#define NS_FORM_SELECTED                (NS_FORM_EVENT_START + 3)
#define NS_FORM_INPUT                   (NS_FORM_EVENT_START + 4)
#define NS_FORM_INVALID                 (NS_FORM_EVENT_START + 5)

//Need separate focus/blur notifications for non-native widgets
#define NS_FOCUS_EVENT_START            1300
#define NS_FOCUS_CONTENT                (NS_FOCUS_EVENT_START)
#define NS_BLUR_CONTENT                 (NS_FOCUS_EVENT_START + 1)

#define NS_DRAGDROP_EVENT_START         1400
#define NS_DRAGDROP_ENTER               (NS_DRAGDROP_EVENT_START)
#define NS_DRAGDROP_OVER                (NS_DRAGDROP_EVENT_START + 1)
#define NS_DRAGDROP_EXIT                (NS_DRAGDROP_EVENT_START + 2)
#define NS_DRAGDROP_DRAGDROP            (NS_DRAGDROP_EVENT_START + 3)
#define NS_DRAGDROP_GESTURE             (NS_DRAGDROP_EVENT_START + 4)
#define NS_DRAGDROP_DRAG                (NS_DRAGDROP_EVENT_START + 5)
#define NS_DRAGDROP_END                 (NS_DRAGDROP_EVENT_START + 6)
#define NS_DRAGDROP_START               (NS_DRAGDROP_EVENT_START + 7)
#define NS_DRAGDROP_DROP                (NS_DRAGDROP_EVENT_START + 8)
#define NS_DRAGDROP_OVER_SYNTH          (NS_DRAGDROP_EVENT_START + 1)
#define NS_DRAGDROP_EXIT_SYNTH          (NS_DRAGDROP_EVENT_START + 2)
#define NS_DRAGDROP_LEAVE_SYNTH         (NS_DRAGDROP_EVENT_START + 9)

// Events for popups
#define NS_XUL_EVENT_START            1500
#define NS_XUL_POPUP_SHOWING          (NS_XUL_EVENT_START)
#define NS_XUL_POPUP_SHOWN            (NS_XUL_EVENT_START+1)
#define NS_XUL_POPUP_HIDING           (NS_XUL_EVENT_START+2)
#define NS_XUL_POPUP_HIDDEN           (NS_XUL_EVENT_START+3)
// NS_XUL_COMMAND used to be here     (NS_XUL_EVENT_START+4)
#define NS_XUL_BROADCAST              (NS_XUL_EVENT_START+5)
#define NS_XUL_COMMAND_UPDATE         (NS_XUL_EVENT_START+6)
//@}

// Scroll events
#define NS_MOUSE_SCROLL_START         1600
#define NS_MOUSE_SCROLL               (NS_MOUSE_SCROLL_START)
#define NS_MOUSE_PIXEL_SCROLL         (NS_MOUSE_SCROLL_START + 1)

#define NS_SCROLLPORT_START           1700
#define NS_SCROLLPORT_UNDERFLOW       (NS_SCROLLPORT_START)
#define NS_SCROLLPORT_OVERFLOW        (NS_SCROLLPORT_START+1)
#define NS_SCROLLPORT_OVERFLOWCHANGED (NS_SCROLLPORT_START+2)

// Mutation events defined elsewhere starting at 1800

#define NS_USER_DEFINED_EVENT         2000
 
// composition events
#define NS_COMPOSITION_EVENT_START    2200
#define NS_COMPOSITION_START          (NS_COMPOSITION_EVENT_START)
#define NS_COMPOSITION_END            (NS_COMPOSITION_EVENT_START + 1)
#define NS_COMPOSITION_UPDATE         (NS_COMPOSITION_EVENT_START + 2)

// text events
#define NS_TEXT_START                 2400
#define NS_TEXT_TEXT                  (NS_TEXT_START)

// UI events
#define NS_UI_EVENT_START          2500
// this is not to be confused with NS_ACTIVATE!
#define NS_UI_ACTIVATE             (NS_UI_EVENT_START)
#define NS_UI_FOCUSIN              (NS_UI_EVENT_START + 1)
#define NS_UI_FOCUSOUT             (NS_UI_EVENT_START + 2)

// pagetransition events
#define NS_PAGETRANSITION_START    2700
#define NS_PAGE_SHOW               (NS_PAGETRANSITION_START + 1)
#define NS_PAGE_HIDE               (NS_PAGETRANSITION_START + 2)

// SVG events
#define NS_SVG_EVENT_START              2800
#define NS_SVG_LOAD                     (NS_SVG_EVENT_START)
#define NS_SVG_UNLOAD                   (NS_SVG_EVENT_START + 1)
#define NS_SVG_ABORT                    (NS_SVG_EVENT_START + 2)
#define NS_SVG_ERROR                    (NS_SVG_EVENT_START + 3)
#define NS_SVG_RESIZE                   (NS_SVG_EVENT_START + 4)
#define NS_SVG_SCROLL                   (NS_SVG_EVENT_START + 5)

// SVG Zoom events
#define NS_SVGZOOM_EVENT_START          2900
#define NS_SVG_ZOOM                     (NS_SVGZOOM_EVENT_START)

// XUL command events
#define NS_XULCOMMAND_EVENT_START       3000
#define NS_XUL_COMMAND                  (NS_XULCOMMAND_EVENT_START)

// Cut, copy, paste events
#define NS_CUTCOPYPASTE_EVENT_START     3100
#define NS_COPY             (NS_CUTCOPYPASTE_EVENT_START)
#define NS_CUT              (NS_CUTCOPYPASTE_EVENT_START + 1)
#define NS_PASTE            (NS_CUTCOPYPASTE_EVENT_START + 2)

// Query the content information
#define NS_QUERY_CONTENT_EVENT_START    3200
// Query for the selected text information, it return the selection offset,
// selection length and selected text.
#define NS_QUERY_SELECTED_TEXT          (NS_QUERY_CONTENT_EVENT_START)
// Query for the text content of specified range, it returns actual lengh (if
// the specified range is too long) and the text of the specified range.
// Returns the entire text if requested length > actual length.
#define NS_QUERY_TEXT_CONTENT           (NS_QUERY_CONTENT_EVENT_START + 1)
// Query for the caret rect of nth insertion point. The offset of the result is
// relative position from the top level widget.
#define NS_QUERY_CARET_RECT             (NS_QUERY_CONTENT_EVENT_START + 3)
// Query for the bounding rect of a range of characters. This works on any
// valid character range given offset and length. Result is relative to top
// level widget coordinates
#define NS_QUERY_TEXT_RECT              (NS_QUERY_CONTENT_EVENT_START + 4)
// Query for the bounding rect of the current focused frame. Result is relative
// to top level widget coordinates
#define NS_QUERY_EDITOR_RECT            (NS_QUERY_CONTENT_EVENT_START + 5)
// Query for the current state of the content. The particular members of
// mReply that are set for each query content event will be valid on success.
#define NS_QUERY_CONTENT_STATE          (NS_QUERY_CONTENT_EVENT_START + 6)
// Query for the selection in the form of a nsITransferable.
#define NS_QUERY_SELECTION_AS_TRANSFERABLE (NS_QUERY_CONTENT_EVENT_START + 7)
// Query for character at a point.  This returns the character offset and its
// rect.  The point is specified by nsEvent::refPoint.
#define NS_QUERY_CHARACTER_AT_POINT     (NS_QUERY_CONTENT_EVENT_START + 8)
// Query if the DOM element under nsEvent::refPoint belongs to our widget
// or not.
#define NS_QUERY_DOM_WIDGET_HITTEST     (NS_QUERY_CONTENT_EVENT_START + 9)

// Video events
#define NS_MEDIA_EVENT_START            3300
#define NS_LOADSTART           (NS_MEDIA_EVENT_START)
#define NS_PROGRESS            (NS_MEDIA_EVENT_START+1)
#define NS_SUSPEND             (NS_MEDIA_EVENT_START+2)
#define NS_EMPTIED             (NS_MEDIA_EVENT_START+3)
#define NS_STALLED             (NS_MEDIA_EVENT_START+4)
#define NS_PLAY                (NS_MEDIA_EVENT_START+5)
#define NS_PAUSE               (NS_MEDIA_EVENT_START+6)
#define NS_LOADEDMETADATA      (NS_MEDIA_EVENT_START+7)
#define NS_LOADEDDATA          (NS_MEDIA_EVENT_START+8)
#define NS_WAITING             (NS_MEDIA_EVENT_START+9)
#define NS_PLAYING             (NS_MEDIA_EVENT_START+10)
#define NS_CANPLAY             (NS_MEDIA_EVENT_START+11)
#define NS_CANPLAYTHROUGH      (NS_MEDIA_EVENT_START+12)
#define NS_SEEKING             (NS_MEDIA_EVENT_START+13)
#define NS_SEEKED              (NS_MEDIA_EVENT_START+14)
#define NS_TIMEUPDATE          (NS_MEDIA_EVENT_START+15)
#define NS_ENDED               (NS_MEDIA_EVENT_START+16)
#define NS_RATECHANGE          (NS_MEDIA_EVENT_START+17)
#define NS_DURATIONCHANGE      (NS_MEDIA_EVENT_START+18)
#define NS_VOLUMECHANGE        (NS_MEDIA_EVENT_START+19)
#define NS_MOZAUDIOAVAILABLE   (NS_MEDIA_EVENT_START+20)

// paint notification events
#define NS_NOTIFYPAINT_START    3400
#define NS_AFTERPAINT           (NS_NOTIFYPAINT_START)

// Simple gesture events
#define NS_SIMPLE_GESTURE_EVENT_START    3500
#define NS_SIMPLE_GESTURE_SWIPE          (NS_SIMPLE_GESTURE_EVENT_START)
#define NS_SIMPLE_GESTURE_MAGNIFY_START  (NS_SIMPLE_GESTURE_EVENT_START+1)
#define NS_SIMPLE_GESTURE_MAGNIFY_UPDATE (NS_SIMPLE_GESTURE_EVENT_START+2)
#define NS_SIMPLE_GESTURE_MAGNIFY        (NS_SIMPLE_GESTURE_EVENT_START+3)
#define NS_SIMPLE_GESTURE_ROTATE_START   (NS_SIMPLE_GESTURE_EVENT_START+4)
#define NS_SIMPLE_GESTURE_ROTATE_UPDATE  (NS_SIMPLE_GESTURE_EVENT_START+5)
#define NS_SIMPLE_GESTURE_ROTATE         (NS_SIMPLE_GESTURE_EVENT_START+6)
#define NS_SIMPLE_GESTURE_TAP            (NS_SIMPLE_GESTURE_EVENT_START+7)
#define NS_SIMPLE_GESTURE_PRESSTAP       (NS_SIMPLE_GESTURE_EVENT_START+8)
#define NS_SIMPLE_GESTURE_EDGEUI         (NS_SIMPLE_GESTURE_EVENT_START+9)

// These are used to send native events to plugins.
#define NS_PLUGIN_EVENT_START            3600
#define NS_PLUGIN_INPUT_EVENT            (NS_PLUGIN_EVENT_START)
#define NS_PLUGIN_FOCUS_EVENT            (NS_PLUGIN_EVENT_START+1)

// Events to manipulate selection (nsSelectionEvent)
#define NS_SELECTION_EVENT_START        3700
// Clear any previous selection and set the given range as the selection
#define NS_SELECTION_SET                (NS_SELECTION_EVENT_START)

// Events of commands for the contents
#define NS_CONTENT_COMMAND_EVENT_START  3800
#define NS_CONTENT_COMMAND_CUT          (NS_CONTENT_COMMAND_EVENT_START)
#define NS_CONTENT_COMMAND_COPY         (NS_CONTENT_COMMAND_EVENT_START+1)
#define NS_CONTENT_COMMAND_PASTE        (NS_CONTENT_COMMAND_EVENT_START+2)
#define NS_CONTENT_COMMAND_DELETE       (NS_CONTENT_COMMAND_EVENT_START+3)
#define NS_CONTENT_COMMAND_UNDO         (NS_CONTENT_COMMAND_EVENT_START+4)
#define NS_CONTENT_COMMAND_REDO         (NS_CONTENT_COMMAND_EVENT_START+5)
#define NS_CONTENT_COMMAND_PASTE_TRANSFERABLE (NS_CONTENT_COMMAND_EVENT_START+6)
// NS_CONTENT_COMMAND_SCROLL scrolls the nearest scrollable element to the
// currently focused content or latest DOM selection. This would normally be
// the same element scrolled by keyboard scroll commands, except that this event
// will scroll an element scrollable in either direction.  I.e., if the nearest
// scrollable ancestor element can only be scrolled vertically, and horizontal
// scrolling is requested using this event, no scrolling will occur.
#define NS_CONTENT_COMMAND_SCROLL       (NS_CONTENT_COMMAND_EVENT_START+7)

// Event to gesture notification
#define NS_GESTURENOTIFY_EVENT_START 3900

#define NS_ORIENTATION_EVENT         4000

#define NS_SCROLLAREA_EVENT_START    4100
#define NS_SCROLLEDAREACHANGED       (NS_SCROLLAREA_EVENT_START)

#define NS_TRANSITION_EVENT_START    4200
#define NS_TRANSITION_END            (NS_TRANSITION_EVENT_START)

#define NS_ANIMATION_EVENT_START     4250
#define NS_ANIMATION_START           (NS_ANIMATION_EVENT_START)
#define NS_ANIMATION_END             (NS_ANIMATION_EVENT_START + 1)
#define NS_ANIMATION_ITERATION       (NS_ANIMATION_EVENT_START + 2)

#define NS_SMIL_TIME_EVENT_START     4300
#define NS_SMIL_BEGIN                (NS_SMIL_TIME_EVENT_START)
#define NS_SMIL_END                  (NS_SMIL_TIME_EVENT_START + 1)
#define NS_SMIL_REPEAT               (NS_SMIL_TIME_EVENT_START + 2)

#define NS_MOZTOUCH_EVENT_START      4400
#define NS_MOZTOUCH_DOWN             (NS_MOZTOUCH_EVENT_START)
#define NS_MOZTOUCH_MOVE             (NS_MOZTOUCH_EVENT_START+1)
#define NS_MOZTOUCH_UP               (NS_MOZTOUCH_EVENT_START+2)

// script notification events
#define NS_NOTIFYSCRIPT_START        4500
#define NS_BEFORE_SCRIPT_EXECUTE     (NS_NOTIFYSCRIPT_START)
#define NS_AFTER_SCRIPT_EXECUTE      (NS_NOTIFYSCRIPT_START+1)

#define NS_PRINT_EVENT_START         4600
#define NS_BEFOREPRINT               (NS_PRINT_EVENT_START)
#define NS_AFTERPRINT                (NS_PRINT_EVENT_START + 1)

#define NS_MESSAGE_EVENT_START       4700
#define NS_MESSAGE                   (NS_MESSAGE_EVENT_START)

// Open and close events
#define NS_OPENCLOSE_EVENT_START     4800
#define NS_OPEN                      (NS_OPENCLOSE_EVENT_START)
#define NS_CLOSE                     (NS_OPENCLOSE_EVENT_START+1)

// Device motion and orientation
#define NS_DEVICE_ORIENTATION_START  4900
#define NS_DEVICE_ORIENTATION        (NS_DEVICE_ORIENTATION_START)
#define NS_DEVICE_MOTION             (NS_DEVICE_ORIENTATION_START+1)
#define NS_DEVICE_PROXIMITY          (NS_DEVICE_ORIENTATION_START+2)
#define NS_USER_PROXIMITY            (NS_DEVICE_ORIENTATION_START+3)
#define NS_DEVICE_LIGHT              (NS_DEVICE_ORIENTATION_START+4)

#define NS_SHOW_EVENT                5000

// Fullscreen DOM API
#define NS_FULL_SCREEN_START         5100
#define NS_FULLSCREENCHANGE          (NS_FULL_SCREEN_START)
#define NS_FULLSCREENERROR           (NS_FULL_SCREEN_START + 1)

#define NS_TOUCH_EVENT_START         5200
#define NS_TOUCH_START               (NS_TOUCH_EVENT_START)
#define NS_TOUCH_MOVE                (NS_TOUCH_EVENT_START+1)
#define NS_TOUCH_END                 (NS_TOUCH_EVENT_START+2)
#define NS_TOUCH_ENTER               (NS_TOUCH_EVENT_START+3)
#define NS_TOUCH_LEAVE               (NS_TOUCH_EVENT_START+4)
#define NS_TOUCH_CANCEL              (NS_TOUCH_EVENT_START+5)

// Pointerlock DOM API
#define NS_POINTERLOCK_START         5300
#define NS_POINTERLOCKCHANGE         (NS_POINTERLOCK_START)
#define NS_POINTERLOCKERROR          (NS_POINTERLOCK_START + 1)

#define NS_WHEEL_EVENT_START         5400
#define NS_WHEEL_WHEEL               (NS_WHEEL_EVENT_START)

/**
 * Return status for event processors, nsEventStatus, is defined in
 * nsEvent.h.
 */

/**
 * different types of (top-level) window z-level positioning
 */
enum nsWindowZ {
  nsWindowZTop = 0,   // on top
  nsWindowZBottom,    // on bottom
  nsWindowZRelative   // just below some specified widget
};

/**
 * General event
 */

class nsEvent
{
protected:
  nsEvent(bool isTrusted, uint32_t msg, uint8_t structType)
    : eventStructType(structType),
      message(msg),
      refPoint(0, 0),
      lastRefPoint(0, 0),
      time(0),
      flags(isTrusted ? NS_EVENT_FLAG_TRUSTED : NS_EVENT_FLAG_NONE),
      userType(0)
  {
    MOZ_COUNT_CTOR(nsEvent);
  }

  nsEvent()
  {
    MOZ_COUNT_CTOR(nsEvent);
  }

public:
  nsEvent(bool isTrusted, uint32_t msg)
    : eventStructType(NS_EVENT),
      message(msg),
      refPoint(0, 0),
      lastRefPoint(0, 0),
      time(0),
      flags(isTrusted ? NS_EVENT_FLAG_TRUSTED : NS_EVENT_FLAG_NONE),
      userType(0)
  {
    MOZ_COUNT_CTOR(nsEvent);
  }

  ~nsEvent()
  {
    MOZ_COUNT_DTOR(nsEvent);
  }

  nsEvent(const nsEvent& aOther)
  {
    MOZ_COUNT_CTOR(nsEvent);
    *this = aOther;
  }

  // See event struct types
  uint8_t     eventStructType;
  // See GUI MESSAGES,
  uint32_t    message;
  // Relative to the widget of the event, or if there is no widget then it is
  // in screen coordinates. Not modified by layout code.
  nsIntPoint  refPoint;
  // The previous refPoint, if known, used to calculate mouse movement deltas.
  nsIntPoint  lastRefPoint;
  // Elapsed time, in milliseconds, from a platform-specific zero time
  // to the time the message was created
  uint64_t    time;
  // Flags to hold event flow stage and capture/bubble cancellation
  // status. This is used also to indicate whether the event is trusted.
  uint32_t    flags;
  // Additional type info for user defined events
  nsCOMPtr<nsIAtom>     userType;
  // Event targets, needed by DOM Events
  nsCOMPtr<nsIDOMEventTarget> target;
  nsCOMPtr<nsIDOMEventTarget> currentTarget;
  nsCOMPtr<nsIDOMEventTarget> originalTarget;
};

/**
 * General graphic user interface event
 */

class nsGUIEvent : public nsEvent
{
protected:
  nsGUIEvent(bool isTrusted, uint32_t msg, nsIWidget *w, uint8_t structType)
    : nsEvent(isTrusted, msg, structType),
      widget(w), pluginEvent(nullptr)
  {
  }

  nsGUIEvent()
    : pluginEvent(nullptr)
  {
  }

public:
  nsGUIEvent(bool isTrusted, uint32_t msg, nsIWidget *w)
    : nsEvent(isTrusted, msg, NS_GUI_EVENT),
      widget(w), pluginEvent(nullptr)
  {
  }

  /// Originator of the event
  nsCOMPtr<nsIWidget> widget;

  /// Event for NPAPI plugin
  void* pluginEvent;
};

/**
 * Script error event
 */

class nsScriptErrorEvent : public nsEvent
{
public:
  nsScriptErrorEvent(bool isTrusted, uint32_t msg)
    : nsEvent(isTrusted, msg, NS_SCRIPT_ERROR_EVENT),
      lineNr(0), errorMsg(nullptr), fileName(nullptr)
  {
  }

  int32_t           lineNr;
  const PRUnichar*  errorMsg;
  const PRUnichar*  fileName;
};

/**
 * Scrollbar event
 */

class nsScrollbarEvent : public nsGUIEvent
{
public:
  nsScrollbarEvent(bool isTrusted, uint32_t msg, nsIWidget *w)
    : nsGUIEvent(isTrusted, msg, w, NS_SCROLLBAR_EVENT),
      position(0)
  {
  }

  /// ranges between scrollbar 0 and (maxRange - thumbSize). See nsIScrollbar
  uint32_t        position; 
};

class nsScrollPortEvent : public nsGUIEvent
{
public:
  enum orientType {
    vertical   = 0,
    horizontal = 1,
    both       = 2
  };

  nsScrollPortEvent(bool isTrusted, uint32_t msg, nsIWidget *w)
    : nsGUIEvent(isTrusted, msg, w, NS_SCROLLPORT_EVENT),
      orient(vertical)
  {
  }

  orientType orient;
};

class nsScrollAreaEvent : public nsGUIEvent
{
public:
  nsScrollAreaEvent(bool isTrusted, uint32_t msg, nsIWidget *w)
    : nsGUIEvent(isTrusted, msg, w, NS_SCROLLAREA_EVENT)
  {
  }

  nsRect mArea;
};

class nsInputEvent : public nsGUIEvent
{
protected:
  nsInputEvent(bool isTrusted, uint32_t msg, nsIWidget *w,
               uint8_t structType)
    : nsGUIEvent(isTrusted, msg, w, structType),
      modifiers(0)
  {
  }

  nsInputEvent()
  {
  }

public:
  nsInputEvent(bool isTrusted, uint32_t msg, nsIWidget *w)
    : nsGUIEvent(isTrusted, msg, w, NS_INPUT_EVENT),
      modifiers(0)
  {
  }

  // true indicates the shift key is down
  bool IsShift() const
  {
    return ((modifiers & mozilla::widget::MODIFIER_SHIFT) != 0);
  }
  // true indicates the control key is down
  bool IsControl() const
  {
    return ((modifiers & mozilla::widget::MODIFIER_CONTROL) != 0);
  }
  // true indicates the alt key is down
  bool IsAlt() const
  {
    return ((modifiers & mozilla::widget::MODIFIER_ALT) != 0);
  }
  // true indicates the meta key is down (or, on Mac, the Command key)
  bool IsMeta() const
  {
    return ((modifiers & mozilla::widget::MODIFIER_META) != 0);
  }
  // true indicates the win key is down on Windows. Or the Super or Hyper key
  // is down on Linux.
  bool IsOS() const
  {
    return ((modifiers & mozilla::widget::MODIFIER_OS) != 0);
  }
  // true indicates the alt graph key is down
  // NOTE: on Mac, the option key press causes both IsAlt() and IsAltGrpah()
  //       return true.
  bool IsAltGraph() const
  {
    return ((modifiers & mozilla::widget::MODIFIER_ALTGRAPH) != 0);
  }
  // true indeicates the CapLock LED is turn on.
  bool IsCapsLocked() const
  {
    return ((modifiers & mozilla::widget::MODIFIER_CAPSLOCK) != 0);
  }
  // true indeicates the NumLock LED is turn on.
  bool IsNumLocked() const
  {
    return ((modifiers & mozilla::widget::MODIFIER_NUMLOCK) != 0);
  }
  // true indeicates the ScrollLock LED is turn on.
  bool IsScrollLocked() const
  {
    return ((modifiers & mozilla::widget::MODIFIER_SCROLLLOCK) != 0);
  }

  // true indeicates the Fn key is down, but this is not supported by native
  // key event on any platform.
  bool IsFn() const
  {
    return ((modifiers & mozilla::widget::MODIFIER_FN) != 0);
  }
  // true indeicates the ScrollLock LED is turn on.
  bool IsSymbolLocked() const
  {
    return ((modifiers & mozilla::widget::MODIFIER_SYMBOLLOCK) != 0);
  }

  void InitBasicModifiers(bool aCtrlKey,
                          bool aAltKey,
                          bool aShiftKey,
                          bool aMetaKey)
  {
    modifiers = 0;
    if (aCtrlKey) {
      modifiers |= mozilla::widget::MODIFIER_CONTROL;
    }
    if (aAltKey) {
      modifiers |= mozilla::widget::MODIFIER_ALT;
    }
    if (aShiftKey) {
      modifiers |= mozilla::widget::MODIFIER_SHIFT;
    }
    if (aMetaKey) {
      modifiers |= mozilla::widget::MODIFIER_META;
    }
  }

  mozilla::widget::Modifiers modifiers;
};

/**
 * Mouse event
 */

class nsMouseEvent_base : public nsInputEvent
{
private:
  friend class mozilla::dom::PBrowserParent;
  friend class mozilla::dom::PBrowserChild;

public:

  nsMouseEvent_base()
  {
  }

  nsMouseEvent_base(bool isTrusted, uint32_t msg, nsIWidget *w, uint8_t type)
    : nsInputEvent(isTrusted, msg, w, type), button(0), buttons(0),
      pressure(0), inputSource(nsIDOMMouseEvent::MOZ_SOURCE_MOUSE) {}

  /// The possible related target
  nsCOMPtr<nsISupports> relatedTarget;

  int16_t               button;
  int16_t               buttons;

  // Finger or touch pressure of event
  // ranges between 0.0 and 1.0
  float                 pressure;

  // Possible values at nsIDOMMouseEvent
  uint16_t              inputSource;
};

class nsMouseEvent : public nsMouseEvent_base
{
private:
  friend class mozilla::dom::PBrowserParent;
  friend class mozilla::dom::PBrowserChild;

public:
  enum buttonType  { eLeftButton = 0, eMiddleButton = 1, eRightButton = 2 };
  enum buttonsFlag { eLeftButtonFlag   = 0x01,
                     eRightButtonFlag  = 0x02,
                     eMiddleButtonFlag = 0x04,
                     // typicall, "back" button being left side of 5-button
                     // mice, see "buttons" attribute document of DOM3 Events.
                     e4thButtonFlag    = 0x08,
                     // typicall, "forward" button being right side of 5-button
                     // mice, see "buttons" attribute document of DOM3 Events.
                     e5thButtonFlag    = 0x10 };
  enum reasonType  { eReal, eSynthesized };
  enum contextType { eNormal, eContextMenuKey };
  enum exitType    { eChild, eTopLevel };

  nsMouseEvent()
  {
  }

protected:
  nsMouseEvent(bool isTrusted, uint32_t msg, nsIWidget *w,
               uint8_t structType, reasonType aReason)
    : nsMouseEvent_base(isTrusted, msg, w, structType),
      acceptActivation(false), ignoreRootScrollFrame(false),
      reason(aReason), context(eNormal), exit(eChild), clickCount(0)
  {
    switch (msg) {
      case NS_MOUSE_MOVE:
        flags |= NS_EVENT_FLAG_CANT_CANCEL;
        break;
      case NS_MOUSEENTER:
      case NS_MOUSELEAVE:
        flags |= (NS_EVENT_FLAG_CANT_CANCEL & NS_EVENT_FLAG_CANT_BUBBLE);
        break;
      default:
        break;
    }
  }

public:

  nsMouseEvent(bool isTrusted, uint32_t msg, nsIWidget *w,
               reasonType aReason, contextType aContext = eNormal)
    : nsMouseEvent_base(isTrusted, msg, w, NS_MOUSE_EVENT),
      acceptActivation(false), ignoreRootScrollFrame(false),
      reason(aReason), context(aContext), exit(eChild), clickCount(0)
  {
    switch (msg) {
      case NS_MOUSE_MOVE:
        flags |= NS_EVENT_FLAG_CANT_CANCEL;
        break;
      case NS_MOUSEENTER:
      case NS_MOUSELEAVE:
        flags |= (NS_EVENT_FLAG_CANT_CANCEL | NS_EVENT_FLAG_CANT_BUBBLE);
        break;
      case NS_CONTEXTMENU:
        button = (context == eNormal) ? eRightButton : eLeftButton;
        break;
      default:
        break;
    }
  }

#ifdef DEBUG
  ~nsMouseEvent() {
    NS_WARN_IF_FALSE(message != NS_CONTEXTMENU ||
                     button ==
                       ((context == eNormal) ? eRightButton : eLeftButton),
                     "Wrong button set to NS_CONTEXTMENU event?");
  }
#endif

  /// Special return code for MOUSE_ACTIVATE to signal
  /// if the target accepts activation (1), or denies it (0)
  bool acceptActivation;
  // Whether the event should ignore scroll frame bounds
  // during dispatch.
  bool ignoreRootScrollFrame;

  reasonType   reason : 4;
  contextType  context : 4;
  exitType     exit;

  /// The number of mouse clicks
  uint32_t     clickCount;
};

/**
 * Drag event
 */

class nsDragEvent : public nsMouseEvent
{
public:
  nsDragEvent(bool isTrusted, uint32_t msg, nsIWidget *w)
    : nsMouseEvent(isTrusted, msg, w, NS_DRAG_EVENT, eReal),
      userCancelled(false)
  {
    if (msg == NS_DRAGDROP_EXIT_SYNTH ||
        msg == NS_DRAGDROP_LEAVE_SYNTH ||
        msg == NS_DRAGDROP_END) {
      flags |= NS_EVENT_FLAG_CANT_CANCEL;
    }
  }

  nsCOMPtr<nsIDOMDataTransfer> dataTransfer;
  bool userCancelled;
};

/**
 * Keyboard event
 */

struct nsAlternativeCharCode {
  nsAlternativeCharCode(uint32_t aUnshiftedCharCode,
                        uint32_t aShiftedCharCode) :
    mUnshiftedCharCode(aUnshiftedCharCode), mShiftedCharCode(aShiftedCharCode)
  {
  }
  uint32_t mUnshiftedCharCode;
  uint32_t mShiftedCharCode;
};

class nsKeyEvent : public nsInputEvent
{
private:
  friend class mozilla::dom::PBrowserParent;
  friend class mozilla::dom::PBrowserChild;

public:
  nsKeyEvent()
  {
  }

  nsKeyEvent(bool isTrusted, uint32_t msg, nsIWidget *w)
    : nsInputEvent(isTrusted, msg, w, NS_KEY_EVENT),
      keyCode(0), charCode(0),
      location(nsIDOMKeyEvent::DOM_KEY_LOCATION_STANDARD), isChar(0)
  {
  }

  /// see NS_VK codes
  uint32_t        keyCode;   
  /// OS translated Unicode char
  uint32_t        charCode;
  // One of nsIDOMKeyEvent::DOM_KEY_LOCATION_*
  uint32_t        location;
  // OS translated Unicode chars which are used for accesskey and accelkey
  // handling. The handlers will try from first character to last character.
  nsTArray<nsAlternativeCharCode> alternativeCharCodes;
  // indicates whether the event signifies a printable character
  bool            isChar;
};

/**
 * IME Related Events
 */
 
struct nsTextRangeStyle
{
  enum {
    LINESTYLE_NONE   = NS_STYLE_TEXT_DECORATION_STYLE_NONE,
    LINESTYLE_SOLID  = NS_STYLE_TEXT_DECORATION_STYLE_SOLID,
    LINESTYLE_DOTTED = NS_STYLE_TEXT_DECORATION_STYLE_DOTTED,
    LINESTYLE_DASHED = NS_STYLE_TEXT_DECORATION_STYLE_DASHED,
    LINESTYLE_DOUBLE = NS_STYLE_TEXT_DECORATION_STYLE_DOUBLE,
    LINESTYLE_WAVY   = NS_STYLE_TEXT_DECORATION_STYLE_WAVY
  };

  enum {
    DEFINED_NONE             = 0x00,
    DEFINED_LINESTYLE        = 0x01,
    DEFINED_FOREGROUND_COLOR = 0x02,
    DEFINED_BACKGROUND_COLOR = 0x04,
    DEFINED_UNDERLINE_COLOR  = 0x08
  };

  // Initialize all members, because nsTextRange instances may be compared by
  // memcomp.
  nsTextRangeStyle()
  {
    Clear();
  }

  void Clear()
  {
    mDefinedStyles = DEFINED_NONE;
    mLineStyle = LINESTYLE_NONE;
    mIsBoldLine = false;
    mForegroundColor = mBackgroundColor = mUnderlineColor = NS_RGBA(0, 0, 0, 0);
  }

  bool IsDefined() const { return mDefinedStyles != DEFINED_NONE; }

  bool IsLineStyleDefined() const
  {
    return (mDefinedStyles & DEFINED_LINESTYLE) != 0;
  }

  bool IsForegroundColorDefined() const
  {
    return (mDefinedStyles & DEFINED_FOREGROUND_COLOR) != 0;
  }

  bool IsBackgroundColorDefined() const
  {
    return (mDefinedStyles & DEFINED_BACKGROUND_COLOR) != 0;
  }

  bool IsUnderlineColorDefined() const
  {
    return (mDefinedStyles & DEFINED_UNDERLINE_COLOR) != 0;
  }

  bool IsNoChangeStyle() const
  {
    return !IsForegroundColorDefined() && !IsBackgroundColorDefined() &&
           IsLineStyleDefined() && mLineStyle == LINESTYLE_NONE;
  }

  bool Equals(const nsTextRangeStyle& aOther)
  {
    if (mDefinedStyles != aOther.mDefinedStyles)
      return false;
    if (IsLineStyleDefined() && (mLineStyle != aOther.mLineStyle ||
                                 !mIsBoldLine != !aOther.mIsBoldLine))
      return false;
    if (IsForegroundColorDefined() &&
        (mForegroundColor != aOther.mForegroundColor))
      return false;
    if (IsBackgroundColorDefined() &&
        (mBackgroundColor != aOther.mBackgroundColor))
      return false;
    if (IsUnderlineColorDefined() &&
        (mUnderlineColor != aOther.mUnderlineColor))
      return false;
    return true;
  }

  bool operator !=(const nsTextRangeStyle &aOther)
  {
    return !Equals(aOther);
  }

  bool operator ==(const nsTextRangeStyle &aOther)
  {
    return Equals(aOther);
  }

  uint8_t mDefinedStyles;
  uint8_t mLineStyle;        // DEFINED_LINESTYLE

  bool mIsBoldLine;  // DEFINED_LINESTYLE

  nscolor mForegroundColor;  // DEFINED_FOREGROUND_COLOR
  nscolor mBackgroundColor;  // DEFINED_BACKGROUND_COLOR
  nscolor mUnderlineColor;   // DEFINED_UNDERLINE_COLOR
};

struct nsTextRange
{
  nsTextRange()
    : mStartOffset(0), mEndOffset(0), mRangeType(0)
  {
  }

  uint32_t mStartOffset;
  uint32_t mEndOffset;
  uint32_t mRangeType;

  nsTextRangeStyle mRangeStyle;
};

typedef nsTextRange* nsTextRangeArray;

class nsTextEvent : public nsInputEvent
{
private:
  friend class mozilla::dom::PBrowserParent;
  friend class mozilla::dom::PBrowserChild;
  friend class mozilla::plugins::PPluginInstanceChild;

  nsTextEvent()
  {
  }

public:
  uint32_t seqno;

public:
  nsTextEvent(bool isTrusted, uint32_t msg, nsIWidget *w)
    : nsInputEvent(isTrusted, msg, w, NS_TEXT_EVENT),
      rangeCount(0), rangeArray(nullptr), isChar(false)
  {
  }

  nsString          theText;
  uint32_t          rangeCount;
  // Note that the range array may not specify a caret position; in that
  // case there will be no range of type NS_TEXTRANGE_CARETPOSITION in the
  // array.
  nsTextRangeArray  rangeArray;
  bool              isChar;
};

class nsCompositionEvent : public nsGUIEvent
{
private:
  friend class mozilla::dom::PBrowserParent;
  friend class mozilla::dom::PBrowserChild;

  nsCompositionEvent()
  {
  }

public:
  uint32_t seqno;

public:
  nsCompositionEvent(bool isTrusted, uint32_t msg, nsIWidget *w)
    : nsGUIEvent(isTrusted, msg, w, NS_COMPOSITION_EVENT)
  {
    // XXX compositionstart is cancelable in draft of DOM3 Events.
    //     However, it doesn't make sense for us, we cannot cancel composition
    //     when we send compositionstart event.
    flags |= NS_EVENT_FLAG_CANT_CANCEL;
  }

  nsString data;
};

/**
 * nsMouseScrollEvent is used for legacy DOM mouse scroll events, i.e.,
 * DOMMouseScroll and MozMousePixelScroll event.  These events are NOT hanbled
 * by ESM even if widget dispatches them.  Use new widget::WheelEvent instead.
 */

class nsMouseScrollEvent : public nsMouseEvent_base
{
private:
  nsMouseScrollEvent()
  {
  }

public:
  nsMouseScrollEvent(bool isTrusted, uint32_t msg, nsIWidget *w)
    : nsMouseEvent_base(isTrusted, msg, w, NS_MOUSE_SCROLL_EVENT),
      delta(0), isHorizontal(false)
  {
  }

  int32_t               delta;
  bool                  isHorizontal;
};

/**
 * WheelEvent is used only for DOM Level 3 WheelEvent (dom::DOMWheelEvent).
 */

namespace mozilla {
namespace widget {

class WheelEvent : public nsMouseEvent_base
{
private:
  friend class mozilla::dom::PBrowserParent;
  friend class mozilla::dom::PBrowserChild;

  WheelEvent()
  {
  }

public:
  WheelEvent(bool aIsTrusted, uint32_t aMessage, nsIWidget* aWidget) :
    nsMouseEvent_base(aIsTrusted, aMessage, aWidget, NS_WHEEL_EVENT),
    deltaX(0.0), deltaY(0.0), deltaZ(0.0),
    deltaMode(nsIDOMWheelEvent::DOM_DELTA_PIXEL),
    customizedByUserPrefs(false), isMomentum(false), isPixelOnlyDevice(false),
    lineOrPageDeltaX(0), lineOrPageDeltaY(0), scrollType(SCROLL_DEFAULT),
    overflowDeltaX(0.0), overflowDeltaY(0.0)
  {
  }

  double deltaX;
  double deltaY;
  double deltaZ;

  // Should be one of nsIDOMWheelEvent::DOM_DELTA_*
  uint32_t deltaMode;

  // Following members are for internal use only, not for DOM event.

  // If the delta values are computed from prefs, this value is true.
  // Otherwise, i.e., they are computed from native events, false.
  bool customizedByUserPrefs;

  // true if the event is caused by momentum.
  bool isMomentum;

  // If device event handlers don't know when they should set lineOrPageDeltaX
  // and lineOrPageDeltaY, this is true.  Otherwise, false.
  // If isPixelOnlyDevice is true, ESM will generate NS_MOUSE_SCROLL events
  // when accumulated pixel delta values reach a line height.
  bool isPixelOnlyDevice;

  // If widget sets lineOrPageDelta, nsEventStateManager will dispatch
  // NS_MOUSE_SCROLL event for compatibility.  Note that the delta value means
  // pages if the deltaMode is DOM_DELTA_PAGE, otherwise, lines.
  int32_t lineOrPageDeltaX;
  int32_t lineOrPageDeltaY;

  // When the default action for an wheel event is moving history or zooming,
  // need to chose a delta value for doing it.
  int32_t GetPreferredIntDelta()
  {
    if (!lineOrPageDeltaX && !lineOrPageDeltaY) {
      return 0;
    }
    if (lineOrPageDeltaY && !lineOrPageDeltaX) {
      return lineOrPageDeltaY;
    }
    if (lineOrPageDeltaX && !lineOrPageDeltaY) {
      return lineOrPageDeltaX;
    }
    if ((lineOrPageDeltaX < 0 && lineOrPageDeltaY > 0) ||
        (lineOrPageDeltaX > 0 && lineOrPageDeltaY < 0)) {
      return 0; // We cannot guess the answer in this case.
    }
    return (NS_ABS(lineOrPageDeltaX) > NS_ABS(lineOrPageDeltaY)) ?
             lineOrPageDeltaX : lineOrPageDeltaY;
  }

  // Scroll type
  // The default value is SCROLL_DEFAULT, which means nsEventStateManager will
  // select preferred scroll type automatically.
  enum ScrollType {
    SCROLL_DEFAULT,
    SCROLL_SYNCHRONOUSLY,
    SCROLL_ASYNCHRONOUSELY,
    SCROLL_SMOOTHLY
  };
  ScrollType scrollType;

  // overflowed delta values, these values are the result of dispatching this
  // event.
  double overflowDeltaX;
  double overflowDeltaY;
};

} // namespace widget
} // namespace mozilla

/*
 * Gesture Notify Event:
 *
 * This event is the first event generated when the user touches
 * the screen with a finger, and it's meant to decide what kind
 * of action we'll use for that touch interaction.
 *
 * The event is dispatched to the layout and based on what is underneath
 * the initial contact point it's then decided if we should pan
 * (finger scrolling) or drag the target element.
 */
class nsGestureNotifyEvent : public nsGUIEvent
{
public:
  enum ePanDirection {
    ePanNone,
    ePanVertical,
    ePanHorizontal,
    ePanBoth
  };
  
  ePanDirection panDirection;
  bool          displayPanFeedback;
  
  nsGestureNotifyEvent(bool aIsTrusted, uint32_t aMsg, nsIWidget *aWidget):
    nsGUIEvent(aIsTrusted, aMsg, aWidget, NS_GESTURENOTIFY_EVENT),
    panDirection(ePanNone),
    displayPanFeedback(false)
  {
  }
};

class nsQueryContentEvent : public nsGUIEvent
{
private:
  friend class mozilla::dom::PBrowserParent;
  friend class mozilla::dom::PBrowserChild;

  nsQueryContentEvent()
  {
    mReply.mContentsRoot = nullptr;
    mReply.mFocusedWidget = nullptr;
  }

public:
  nsQueryContentEvent(bool aIsTrusted, uint32_t aMsg, nsIWidget *aWidget) :
    nsGUIEvent(aIsTrusted, aMsg, aWidget, NS_QUERY_CONTENT_EVENT),
    mSucceeded(false), mWasAsync(false)
  {
  }

  void InitForQueryTextContent(uint32_t aOffset, uint32_t aLength)
  {
    NS_ASSERTION(message == NS_QUERY_TEXT_CONTENT,
                 "wrong initializer is called");
    mInput.mOffset = aOffset;
    mInput.mLength = aLength;
  }

  void InitForQueryCaretRect(uint32_t aOffset)
  {
    NS_ASSERTION(message == NS_QUERY_CARET_RECT,
                 "wrong initializer is called");
    mInput.mOffset = aOffset;
  }

  void InitForQueryTextRect(uint32_t aOffset, uint32_t aLength)
  {
    NS_ASSERTION(message == NS_QUERY_TEXT_RECT,
                 "wrong initializer is called");
    mInput.mOffset = aOffset;
    mInput.mLength = aLength;
  }

  void InitForQueryDOMWidgetHittest(nsIntPoint& aPoint)
  {
    NS_ASSERTION(message == NS_QUERY_DOM_WIDGET_HITTEST,
                 "wrong initializer is called");
    refPoint = aPoint;
  }

  uint32_t GetSelectionStart(void) const
  {
    NS_ASSERTION(message == NS_QUERY_SELECTED_TEXT,
                 "not querying selection");
    return mReply.mOffset + (mReply.mReversed ? mReply.mString.Length() : 0);
  }

  uint32_t GetSelectionEnd(void) const
  {
    NS_ASSERTION(message == NS_QUERY_SELECTED_TEXT,
                 "not querying selection");
    return mReply.mOffset + (mReply.mReversed ? 0 : mReply.mString.Length());
  }

  bool mSucceeded;
  bool mWasAsync;
  struct {
    uint32_t mOffset;
    uint32_t mLength;
  } mInput;
  struct {
    void* mContentsRoot;
    uint32_t mOffset;
    nsString mString;
    nsIntRect mRect; // Finally, the coordinates is system coordinates.
    // The return widget has the caret. This is set at all query events.
    nsIWidget* mFocusedWidget;
    bool mReversed; // true if selection is reversed (end < start)
    bool mHasSelection; // true if the selection exists
    bool mWidgetIsHit; // true if DOM element under mouse belongs to widget
    // used by NS_QUERY_SELECTION_AS_TRANSFERABLE
    nsCOMPtr<nsITransferable> mTransferable;
  } mReply;

  enum {
    NOT_FOUND = PR_UINT32_MAX
  };

  // values of mComputedScrollAction
  enum {
    SCROLL_ACTION_NONE,
    SCROLL_ACTION_LINE,
    SCROLL_ACTION_PAGE
  };
};

class nsFocusEvent : public nsEvent
{
public:
  nsFocusEvent(bool isTrusted, uint32_t msg)
    : nsEvent(isTrusted, msg, NS_FOCUS_EVENT),
      fromRaise(false),
      isRefocus(false)
  {
  }

  bool fromRaise;
  bool isRefocus;
};

class nsSelectionEvent : public nsGUIEvent
{
private:
  friend class mozilla::dom::PBrowserParent;
  friend class mozilla::dom::PBrowserChild;

  nsSelectionEvent()
  {
  }

public:
  uint32_t seqno;

public:
  nsSelectionEvent(bool aIsTrusted, uint32_t aMsg, nsIWidget *aWidget) :
    nsGUIEvent(aIsTrusted, aMsg, aWidget, NS_SELECTION_EVENT),
    mExpandToClusterBoundary(true), mSucceeded(false)
  {
  }

  uint32_t mOffset; // start offset of selection
  uint32_t mLength; // length of selection
  bool mReversed; // selection "anchor" should be in front
  bool mExpandToClusterBoundary; // cluster-based or character-based
  bool mSucceeded;
};

class nsContentCommandEvent : public nsGUIEvent
{
public:
  nsContentCommandEvent(bool aIsTrusted, uint32_t aMsg, nsIWidget *aWidget,
                        bool aOnlyEnabledCheck = false) :
    nsGUIEvent(aIsTrusted, aMsg, aWidget, NS_CONTENT_COMMAND_EVENT),
    mOnlyEnabledCheck(bool(aOnlyEnabledCheck)),
    mSucceeded(false), mIsEnabled(false)
  {
  }

  // NS_CONTENT_COMMAND_PASTE_TRANSFERABLE
  nsCOMPtr<nsITransferable> mTransferable;                 // [in]

  // NS_CONTENT_COMMAND_SCROLL
  // for mScroll.mUnit
  enum {
    eCmdScrollUnit_Line,
    eCmdScrollUnit_Page,
    eCmdScrollUnit_Whole
  };

  struct ScrollInfo {
    ScrollInfo() :
      mAmount(0), mUnit(eCmdScrollUnit_Line), mIsHorizontal(false)
    {
    }

    int32_t      mAmount;                                  // [in]
    uint8_t      mUnit;                                    // [in]
    bool mIsHorizontal;                            // [in]
  } mScroll;

  bool mOnlyEnabledCheck;                          // [in]

  bool mSucceeded;                                 // [out]
  bool mIsEnabled;                                 // [out]
};

class nsMozTouchEvent : public nsMouseEvent_base
{
public:
  nsMozTouchEvent(bool isTrusted, uint32_t msg, nsIWidget* w,
                  uint32_t streamIdArg)
    : nsMouseEvent_base(isTrusted, msg, w, NS_MOZTOUCH_EVENT),
      streamId(streamIdArg)
  {
  }

  uint32_t streamId;
};

class nsTouchEvent : public nsInputEvent
{
public:
  nsTouchEvent()
  {
  }
  nsTouchEvent(bool isTrusted, nsTouchEvent *aEvent)
    : nsInputEvent(isTrusted,
                   aEvent->message,
                   aEvent->widget,
                   NS_TOUCH_EVENT)
  {
    modifiers = aEvent->modifiers;
    time = aEvent->time;
    touches.AppendElements(aEvent->touches);
    MOZ_COUNT_CTOR(nsTouchEvent);
  }
  nsTouchEvent(bool isTrusted, uint32_t msg, nsIWidget* w)
    : nsInputEvent(isTrusted, msg, w, NS_TOUCH_EVENT)
  {
    MOZ_COUNT_CTOR(nsTouchEvent);
  }
  ~nsTouchEvent()
  {
    MOZ_COUNT_DTOR(nsTouchEvent);
  }

  nsTArray<nsCOMPtr<nsIDOMTouch> > touches;
};

/**
 * Form event
 * 
 * We hold the originating form control for form submit and reset events.
 * originator is a weak pointer (does not hold a strong reference).
 */

class nsFormEvent : public nsEvent
{
public:
  nsFormEvent(bool isTrusted, uint32_t msg)
    : nsEvent(isTrusted, msg, NS_FORM_EVENT),
      originator(nullptr)
  {
  }

  nsIContent *originator;
};

/**
 * Command event
 *
 * Custom commands for example from the operating system.
 */

class nsCommandEvent : public nsGUIEvent
{
public:
  nsCommandEvent(bool isTrusted, nsIAtom* aEventType,
                 nsIAtom* aCommand, nsIWidget* w)
    : nsGUIEvent(isTrusted, NS_USER_DEFINED_EVENT, w, NS_COMMAND_EVENT)
  {
    userType = aEventType;
    command = aCommand;
  }

  nsCOMPtr<nsIAtom> command;
};

/**
 * DOM UIEvent
 */
class nsUIEvent : public nsEvent
{
public:
  nsUIEvent(bool isTrusted, uint32_t msg, int32_t d)
    : nsEvent(isTrusted, msg, NS_UI_EVENT),
      detail(d)
  {
  }

  int32_t detail;
};

/**
 * Simple gesture event
 */
class nsSimpleGestureEvent : public nsMouseEvent_base
{
public:
  nsSimpleGestureEvent(bool isTrusted, uint32_t msg, nsIWidget* w,
                         uint32_t directionArg, double deltaArg)
    : nsMouseEvent_base(isTrusted, msg, w, NS_SIMPLE_GESTURE_EVENT),
      direction(directionArg), delta(deltaArg), clickCount(0)
  {
  }

  nsSimpleGestureEvent(const nsSimpleGestureEvent& other)
    : nsMouseEvent_base((other.flags & NS_EVENT_FLAG_TRUSTED) != 0,
                        other.message, other.widget, NS_SIMPLE_GESTURE_EVENT),
      direction(other.direction), delta(other.delta), clickCount(0)
  {
  }

  uint32_t direction;   // See nsIDOMSimpleGestureEvent for values
  double delta;         // Delta for magnify and rotate events
  uint32_t clickCount;  // The number of taps for tap events
};

class nsTransitionEvent : public nsEvent
{
public:
  nsTransitionEvent(bool isTrusted, uint32_t msg,
                    const nsString &propertyNameArg, float elapsedTimeArg)
    : nsEvent(isTrusted, msg, NS_TRANSITION_EVENT),
      propertyName(propertyNameArg), elapsedTime(elapsedTimeArg)
  {
  }

  nsString propertyName;
  float elapsedTime;
};

class nsAnimationEvent : public nsEvent
{
public:
  nsAnimationEvent(bool isTrusted, uint32_t msg,
                   const nsString &animationNameArg, float elapsedTimeArg)
    : nsEvent(isTrusted, msg, NS_ANIMATION_EVENT),
      animationName(animationNameArg), elapsedTime(elapsedTimeArg)
  {
  }

  nsString animationName;
  float elapsedTime;
};

/**
 * Native event pluginEvent for plugins.
 */

class nsPluginEvent : public nsGUIEvent
{
public:
  nsPluginEvent(bool isTrusted, uint32_t msg, nsIWidget *w)
    : nsGUIEvent(isTrusted, msg, w, NS_PLUGIN_EVENT),
      retargetToFocusedDocument(false)
  {
  }

  // If TRUE, this event needs to be retargeted to focused document.
  // Otherwise, never retargeted.
  // Defaults to false.
  bool retargetToFocusedDocument;
};

/**
 * Event status for D&D Event
 */
enum nsDragDropEventStatus {  
  /// The event is a enter
  nsDragDropEventStatus_eDragEntered,            
  /// The event is exit
  nsDragDropEventStatus_eDragExited, 
  /// The event is drop
  nsDragDropEventStatus_eDrop  
};

#define NS_IS_INPUT_EVENT(evnt) \
       (((evnt)->eventStructType == NS_INPUT_EVENT) || \
        ((evnt)->eventStructType == NS_MOUSE_EVENT) || \
        ((evnt)->eventStructType == NS_KEY_EVENT) || \
        ((evnt)->eventStructType == NS_TEXT_EVENT) || \
        ((evnt)->eventStructType == NS_TOUCH_EVENT) || \
        ((evnt)->eventStructType == NS_DRAG_EVENT) || \
        ((evnt)->eventStructType == NS_MOUSE_SCROLL_EVENT) || \
        ((evnt)->eventStructType == NS_MOZTOUCH_EVENT) || \
        ((evnt)->eventStructType == NS_SIMPLE_GESTURE_EVENT))

#define NS_IS_MOUSE_EVENT(evnt) \
       (((evnt)->message == NS_MOUSE_BUTTON_DOWN) || \
        ((evnt)->message == NS_MOUSE_BUTTON_UP) || \
        ((evnt)->message == NS_MOUSE_CLICK) || \
        ((evnt)->message == NS_MOUSE_DOUBLECLICK) || \
        ((evnt)->message == NS_MOUSE_ENTER) || \
        ((evnt)->message == NS_MOUSE_EXIT) || \
        ((evnt)->message == NS_MOUSE_ACTIVATE) || \
        ((evnt)->message == NS_MOUSE_ENTER_SYNTH) || \
        ((evnt)->message == NS_MOUSE_EXIT_SYNTH) || \
        ((evnt)->message == NS_MOUSE_MOZHITTEST) || \
        ((evnt)->message == NS_MOUSE_MOVE))

#define NS_IS_MOUSE_EVENT_STRUCT(evnt) \
       ((evnt)->eventStructType == NS_MOUSE_EVENT || \
        (evnt)->eventStructType == NS_DRAG_EVENT)

#define NS_IS_MOUSE_LEFT_CLICK(evnt) \
       ((evnt)->eventStructType == NS_MOUSE_EVENT && \
        (evnt)->message == NS_MOUSE_CLICK && \
        static_cast<nsMouseEvent*>((evnt))->button == nsMouseEvent::eLeftButton)

#define NS_IS_CONTEXT_MENU_KEY(evnt) \
       ((evnt)->eventStructType == NS_MOUSE_EVENT && \
        (evnt)->message == NS_CONTEXTMENU && \
        static_cast<nsMouseEvent*>((evnt))->context == nsMouseEvent::eContextMenuKey)

#define NS_IS_DRAG_EVENT(evnt) \
       (((evnt)->message == NS_DRAGDROP_ENTER) || \
        ((evnt)->message == NS_DRAGDROP_OVER) || \
        ((evnt)->message == NS_DRAGDROP_EXIT) || \
        ((evnt)->message == NS_DRAGDROP_DRAGDROP) || \
        ((evnt)->message == NS_DRAGDROP_GESTURE) || \
        ((evnt)->message == NS_DRAGDROP_DRAG) || \
        ((evnt)->message == NS_DRAGDROP_END) || \
        ((evnt)->message == NS_DRAGDROP_START) || \
        ((evnt)->message == NS_DRAGDROP_DROP) || \
        ((evnt)->message == NS_DRAGDROP_LEAVE_SYNTH))

#define NS_IS_KEY_EVENT(evnt) \
       (((evnt)->message == NS_KEY_DOWN) ||  \
        ((evnt)->message == NS_KEY_PRESS) || \
        ((evnt)->message == NS_KEY_UP))

#define NS_IS_IME_EVENT(evnt) \
       (((evnt)->message == NS_TEXT_TEXT) ||  \
        ((evnt)->message == NS_COMPOSITION_START) ||  \
        ((evnt)->message == NS_COMPOSITION_END) || \
        ((evnt)->message == NS_COMPOSITION_UPDATE))

#define NS_IS_ACTIVATION_EVENT(evnt) \
        (((evnt)->message == NS_PLUGIN_ACTIVATE) || \
        ((evnt)->message == NS_PLUGIN_FOCUS))

#define NS_IS_QUERY_CONTENT_EVENT(evnt) \
       ((evnt)->eventStructType == NS_QUERY_CONTENT_EVENT)

#define NS_IS_SELECTION_EVENT(evnt) \
       (((evnt)->message == NS_SELECTION_SET))

#define NS_IS_CONTENT_COMMAND_EVENT(evnt) \
       ((evnt)->eventStructType == NS_CONTENT_COMMAND_EVENT)

#define NS_IS_PLUGIN_EVENT(evnt) \
       (((evnt)->message == NS_PLUGIN_INPUT_EVENT) || \
        ((evnt)->message == NS_PLUGIN_FOCUS_EVENT))

#define NS_IS_RETARGETED_PLUGIN_EVENT(evnt) \
       (NS_IS_PLUGIN_EVENT(evnt) && \
        (static_cast<nsPluginEvent*>(evnt)->retargetToFocusedDocument))

#define NS_IS_NON_RETARGETED_PLUGIN_EVENT(evnt) \
       (NS_IS_PLUGIN_EVENT(evnt) && \
        !(static_cast<nsPluginEvent*>(evnt)->retargetToFocusedDocument))

#define NS_IS_TRUSTED_EVENT(event) \
  (((event)->flags & NS_EVENT_FLAG_TRUSTED) != 0)

// Mark an event as being dispatching.
#define NS_MARK_EVENT_DISPATCH_STARTED(event) \
  (event)->flags |= NS_EVENT_FLAG_DISPATCHING;

#define NS_IS_EVENT_IN_DISPATCH(event) \
  (((event)->flags & NS_EVENT_FLAG_DISPATCHING) != 0)

// Mark an event as being done dispatching.
#define NS_MARK_EVENT_DISPATCH_DONE(event) \
  NS_ASSERTION(NS_IS_EVENT_IN_DISPATCH(event), \
               "Event never got marked for dispatch!"); \
  (event)->flags &= ~NS_EVENT_FLAG_DISPATCHING; \
  (event)->flags |= NS_EVENT_DISPATCHED;

// Be aware the query content events and the selection events are a part of IME
// processing.  So, you shouldn't use NS_IS_IME_EVENT macro directly in most
// cases, you should use NS_IS_IME_RELATED_EVENT instead.
#define NS_IS_IME_RELATED_EVENT(evnt) \
  (NS_IS_IME_EVENT(evnt) || \
   NS_IS_QUERY_CONTENT_EVENT(evnt) || \
   NS_IS_SELECTION_EVENT(evnt))

/*
 * Virtual key bindings for keyboard events.
 * These come from nsIDOMKeyEvent.h, which is generated from MouseKeyEvent.idl.
 * Really, it would be better if we phased out the NS_VK symbols altogether
 * in favor of the DOM ones, but at least this way they'll be in sync.
 */

enum {
#define NS_DEFINE_VK(aDOMKeyName, aDOMKeyCode) NS_##aDOMKeyName = aDOMKeyCode
#include "nsVKList.h"
#undef NS_DEFINE_VK
};

// IME Constants  -- keep in synch with nsIPrivateTextRange.h
#define NS_TEXTRANGE_CARETPOSITION         0x01
#define NS_TEXTRANGE_RAWINPUT              0x02
#define NS_TEXTRANGE_SELECTEDRAWTEXT       0x03
#define NS_TEXTRANGE_CONVERTEDTEXT         0x04
#define NS_TEXTRANGE_SELECTEDCONVERTEDTEXT 0x05

/**
 * Whether the event should be handled by the frame of the mouse cursor
 * position or not.  When it should be handled there (e.g., the mouse events),
 * this returns TRUE.
 */
inline bool NS_IsEventUsingCoordinates(nsEvent* aEvent)
{
  return !NS_IS_KEY_EVENT(aEvent) && !NS_IS_IME_RELATED_EVENT(aEvent) &&
         !NS_IS_CONTEXT_MENU_KEY(aEvent) && !NS_IS_ACTIVATION_EVENT(aEvent) &&
         !NS_IS_PLUGIN_EVENT(aEvent) &&
         !NS_IS_CONTENT_COMMAND_EVENT(aEvent);
}

/**
 * Whether the event should be handled by the focused DOM window in the
 * same top level window's or not.  E.g., key events, IME related events
 * (including the query content events, they are used in IME transaction)
 * should be handled by the (last) focused window rather than the dispatched
 * window.
 *
 * NOTE: Even if this returns TRUE, the event isn't going to be handled by the
 * application level active DOM window which is on another top level window.
 * So, when the event is fired on a deactive window, the event is going to be
 * handled by the last focused DOM window in the last focused window.
 */
inline bool NS_IsEventTargetedAtFocusedWindow(nsEvent* aEvent)
{
  return NS_IS_KEY_EVENT(aEvent) || NS_IS_IME_RELATED_EVENT(aEvent) ||
         NS_IS_CONTEXT_MENU_KEY(aEvent) ||
         NS_IS_CONTENT_COMMAND_EVENT(aEvent) ||
         NS_IS_RETARGETED_PLUGIN_EVENT(aEvent);
}

/**
 * Whether the event should be handled by the focused content or not.  E.g.,
 * key events, IME related events and other input events which are not handled
 * by the frame of the mouse cursor position.
 *
 * NOTE: Even if this returns TRUE, the event isn't going to be handled by the
 * application level active DOM window which is on another top level window.
 * So, when the event is fired on a deactive window, the event is going to be
 * handled by the last focused DOM element of the last focused DOM window in
 * the last focused window.
 */
inline bool NS_IsEventTargetedAtFocusedContent(nsEvent* aEvent)
{
  return NS_IS_KEY_EVENT(aEvent) || NS_IS_IME_RELATED_EVENT(aEvent) ||
         NS_IS_CONTEXT_MENU_KEY(aEvent) ||
         NS_IS_RETARGETED_PLUGIN_EVENT(aEvent);
}

/**
 * Whether the event should cause a DOM event.
 */
inline bool NS_IsAllowedToDispatchDOMEvent(nsEvent* aEvent)
{
  switch (aEvent->eventStructType) {
    case NS_MOUSE_EVENT:
      // We want synthesized mouse moves to cause mouseover and mouseout
      // DOM events (nsEventStateManager::PreHandleEvent), but not mousemove
      // DOM events.
      // Synthesized button up events also do not cause DOM events because they
      // do not have a reliable refPoint.
      return static_cast<nsMouseEvent*>(aEvent)->reason == nsMouseEvent::eReal;

    case NS_WHEEL_EVENT: {
      // wheel event whose all delta values are zero by user pref applied, it
      // shouldn't cause a DOM event.
      mozilla::widget::WheelEvent* wheelEvent =
        static_cast<mozilla::widget::WheelEvent*>(aEvent);
      return wheelEvent->deltaX != 0.0 || wheelEvent->deltaY != 0.0 ||
             wheelEvent->deltaZ != 0.0;
    }

    default:
      return true;
  }
}

#endif // nsGUIEvent_h__