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.

Implementation

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 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288
/* -*- 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/. */

/*
 * structs that contain the data provided by nsStyleContext, the
 * internal API for computed style data for an element
 */

#ifndef nsStyleStruct_h___
#define nsStyleStruct_h___

#include "mozilla/Attributes.h"

#include "nsColor.h"
#include "nsCoord.h"
#include "nsMargin.h"
#include "nsRect.h"
#include "nsFont.h"
#include "nsStyleCoord.h"
#include "nsStyleConsts.h"
#include "nsChangeHint.h"
#include "nsPresContext.h"
#include "nsCOMPtr.h"
#include "nsCOMArray.h"
#include "nsTArray.h"
#include "nsIAtom.h"
#include "nsCSSValue.h"
#include "imgRequestProxy.h"
#include <algorithm>

class nsIFrame;
class nsIURI;
class imgIContainer;

// Includes nsStyleStructID.
#include "nsStyleStructFwd.h"

// Bits for each struct.
// NS_STYLE_INHERIT_BIT defined in nsStyleStructFwd.h
#define NS_STYLE_INHERIT_MASK             0x007fffff

// Additional bits for nsStyleContext's mBits:
// See nsStyleContext::HasTextDecorationLines
#define NS_STYLE_HAS_TEXT_DECORATION_LINES 0x00800000
// See nsStyleContext::HasPseudoElementData.
#define NS_STYLE_HAS_PSEUDO_ELEMENT_DATA  0x01000000
// See nsStyleContext::RelevantLinkIsVisited
#define NS_STYLE_RELEVANT_LINK_VISITED    0x02000000
// See nsStyleContext::IsStyleIfVisited
#define NS_STYLE_IS_STYLE_IF_VISITED      0x04000000
// See nsStyleContext::GetPseudoEnum
#define NS_STYLE_CONTEXT_TYPE_MASK        0xf8000000
#define NS_STYLE_CONTEXT_TYPE_SHIFT       27

// Additional bits for nsRuleNode's mDependentBits:
#define NS_RULE_NODE_GC_MARK              0x02000000
#define NS_RULE_NODE_USED_DIRECTLY        0x04000000
#define NS_RULE_NODE_IS_IMPORTANT         0x08000000
#define NS_RULE_NODE_LEVEL_MASK           0xf0000000
#define NS_RULE_NODE_LEVEL_SHIFT          28

// The lifetime of these objects is managed by the presshell's arena.

struct nsStyleFont {
  nsStyleFont(const nsFont& aFont, nsPresContext *aPresContext);
  nsStyleFont(const nsStyleFont& aStyleFont);
  nsStyleFont(nsPresContext *aPresContext);
private:
  void Init(nsPresContext *aPresContext);
public:
  ~nsStyleFont(void) {
    MOZ_COUNT_DTOR(nsStyleFont);
  }

  nsChangeHint CalcDifference(const nsStyleFont& aOther) const;
  static nsChangeHint MaxDifference() {
    return NS_STYLE_HINT_REFLOW;
  }
  static nsChangeHint CalcFontDifference(const nsFont& aFont1, const nsFont& aFont2);

  static nscoord ZoomText(nsPresContext* aPresContext, nscoord aSize);
  static nscoord UnZoomText(nsPresContext* aPresContext, nscoord aSize);

  void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW;
  void Destroy(nsPresContext* aContext);

  nsFont  mFont;        // [inherited]
  nscoord mSize;        // [inherited] Our "computed size". Can be different
                        // from mFont.size which is our "actual size" and is
                        // enforced to be >= the user's preferred min-size.
                        // mFont.size should be used for display purposes
                        // while mSize is the value to return in
                        // getComputedStyle() for example.
  uint8_t mGenericID;   // [inherited] generic CSS font family, if any;
                        // value is a kGenericFont_* constant, see nsFont.h.

  // MathML scriptlevel support
  int8_t  mScriptLevel;          // [inherited]

  // was mLanguage set based on a lang attribute in the document?
  bool mExplicitLanguage;        // [inherited]

  // The value mSize would have had if scriptminsize had never been applied
  nscoord mScriptUnconstrainedSize;
  nscoord mScriptMinSize;        // [inherited] length
  float   mScriptSizeMultiplier; // [inherited]
  nsCOMPtr<nsIAtom> mLanguage;   // [inherited]
};

struct nsStyleGradientStop {
  nsStyleCoord mLocation; // percent, coord, calc, none
  nscolor mColor;
};

class nsStyleGradient {
public:
  nsStyleGradient();
  uint8_t mShape;  // NS_STYLE_GRADIENT_SHAPE_*
  uint8_t mSize;   // NS_STYLE_GRADIENT_SIZE_*;
                   // not used (must be FARTHEST_CORNER) for linear shape
  bool mRepeating;
  bool mLegacySyntax;

  nsStyleCoord mBgPosX; // percent, coord, calc, none
  nsStyleCoord mBgPosY; // percent, coord, calc, none
  nsStyleCoord mAngle;  // none, angle

  nsStyleCoord mRadiusX; // percent, coord, calc, none
  nsStyleCoord mRadiusY; // percent, coord, calc, none

  // stops are in the order specified in the stylesheet
  nsTArray<nsStyleGradientStop> mStops;

  bool operator==(const nsStyleGradient& aOther) const;
  bool operator!=(const nsStyleGradient& aOther) const {
    return !(*this == aOther);
  }

  bool IsOpaque();
  bool HasCalc();
  uint32_t Hash(PLDHashNumber aHash);

  NS_INLINE_DECL_REFCOUNTING(nsStyleGradient)

private:
  ~nsStyleGradient() {}

  nsStyleGradient(const nsStyleGradient& aOther) MOZ_DELETE;
  nsStyleGradient& operator=(const nsStyleGradient& aOther) MOZ_DELETE;
};

enum nsStyleImageType {
  eStyleImageType_Null,
  eStyleImageType_Image,
  eStyleImageType_Gradient,
  eStyleImageType_Element
};

/**
 * Represents a paintable image of one of the following types.
 * (1) A real image loaded from an external source.
 * (2) A CSS linear or radial gradient.
 * (3) An element within a document, or an <img>, <video>, or <canvas> element
 *     not in a document.
 * (*) Optionally a crop rect can be set to paint a partial (rectangular)
 * region of an image. (Currently, this feature is only supported with an
 * image of type (1)).
 *
 * This struct is currently used only for 'background-image', but it may be
 * used by other CSS properties such as 'border-image', 'list-style-image', and
 * 'content' in the future (bug 507052).
 */
struct nsStyleImage {
  nsStyleImage();
  ~nsStyleImage();
  nsStyleImage(const nsStyleImage& aOther);
  nsStyleImage& operator=(const nsStyleImage& aOther);

  void SetNull();
  void SetImageData(imgIRequest* aImage);
  void TrackImage(nsPresContext* aContext);
  void UntrackImage(nsPresContext* aContext);
  void SetGradientData(nsStyleGradient* aGradient);
  void SetElementId(const PRUnichar* aElementId);
  void SetCropRect(nsStyleSides* aCropRect);

  nsStyleImageType GetType() const {
    return mType;
  }
  imgIRequest* GetImageData() const {
    NS_ABORT_IF_FALSE(mType == eStyleImageType_Image, "Data is not an image!");
    NS_ABORT_IF_FALSE(mImageTracked,
                      "Should be tracking any image we're going to use!");
    return mImage;
  }
  nsStyleGradient* GetGradientData() const {
    NS_ASSERTION(mType == eStyleImageType_Gradient, "Data is not a gradient!");
    return mGradient;
  }
  const PRUnichar* GetElementId() const {
    NS_ASSERTION(mType == eStyleImageType_Element, "Data is not an element!");
    return mElementId;
  }
  nsStyleSides* GetCropRect() const {
    NS_ASSERTION(mType == eStyleImageType_Image,
                 "Only image data can have a crop rect");
    return mCropRect;
  }

  /**
   * Compute the actual crop rect in pixels, using the source image bounds.
   * The computation involves converting percentage unit to pixel unit and
   * clamping each side value to fit in the source image bounds.
   * @param aActualCropRect the computed actual crop rect.
   * @param aIsEntireImage true iff |aActualCropRect| is identical to the
   * source image bounds.
   * @return true iff |aActualCropRect| holds a meaningful value.
   */
  bool ComputeActualCropRect(nsIntRect& aActualCropRect,
                               bool* aIsEntireImage = nullptr) const;

  /**
   * Starts the decoding of a image.
   */
  nsresult StartDecoding() const;
  /**
   * @return true if the item is definitely opaque --- i.e., paints every
   * pixel within its bounds opaquely, and the bounds contains at least a pixel.
   */
  bool IsOpaque() const;
  /**
   * @return true if this image is fully loaded, and its size is calculated;
   * always returns true if |mType| is |eStyleImageType_Gradient| or
   * |eStyleImageType_Element|.
   */
  bool IsComplete() const;
  /**
   * @return true if it is 100% confident that this image contains no pixel
   * to draw.
   */
  bool IsEmpty() const {
    // There are some other cases when the image will be empty, for example
    // when the crop rect is empty. However, checking the emptiness of crop
    // rect is non-trivial since each side value can be specified with
    // percentage unit, which can not be evaluated until the source image size
    // is available. Therefore, we currently postpone the evaluation of crop
    // rect until the actual rendering time --- alternatively until GetOpaqueRegion()
    // is called.
    return mType == eStyleImageType_Null;
  }

  bool operator==(const nsStyleImage& aOther) const;
  bool operator!=(const nsStyleImage& aOther) const {
    return !(*this == aOther);
  }

  bool ImageDataEquals(const nsStyleImage& aOther) const
  {
    return GetType() == eStyleImageType_Image &&
           aOther.GetType() == eStyleImageType_Image &&
           GetImageData() == aOther.GetImageData();
  }

private:
  void DoCopy(const nsStyleImage& aOther);

  nsStyleImageType mType;
  union {
    imgIRequest* mImage;
    nsStyleGradient* mGradient;
    PRUnichar* mElementId;
  };
  // This is _currently_ used only in conjunction with eStyleImageType_Image.
  nsAutoPtr<nsStyleSides> mCropRect;
#ifdef DEBUG
  bool mImageTracked;
#endif
};

struct nsStyleColor {
  nsStyleColor(nsPresContext* aPresContext);
  nsStyleColor(const nsStyleColor& aOther);
  ~nsStyleColor(void) {
    MOZ_COUNT_DTOR(nsStyleColor);
  }

  nsChangeHint CalcDifference(const nsStyleColor& aOther) const;
  static nsChangeHint MaxDifference() {
    return NS_STYLE_HINT_VISUAL;
  }

  void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
    return aContext->AllocateFromShell(sz);
  }
  void Destroy(nsPresContext* aContext) {
    this->~nsStyleColor();
    aContext->FreeToShell(sizeof(nsStyleColor), this);
  }

  // Don't add ANY members to this struct!  We can achieve caching in the rule
  // tree (rather than the style tree) by letting color stay by itself! -dwh
  nscolor mColor;                 // [inherited]
};

struct nsStyleBackground {
  nsStyleBackground();
  nsStyleBackground(const nsStyleBackground& aOther);
  ~nsStyleBackground();

  void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
    return aContext->AllocateFromShell(sz);
  }
  void Destroy(nsPresContext* aContext);

  nsChangeHint CalcDifference(const nsStyleBackground& aOther) const;
  static nsChangeHint MaxDifference() {
    return NS_CombineHint(nsChangeHint_UpdateEffects, NS_STYLE_HINT_VISUAL);
  }

  struct Position;
  friend struct Position;
  struct Position {
    typedef nsStyleCoord::Calc PositionCoord;
    PositionCoord mXPosition, mYPosition;

    // Initialize nothing
    Position() {}

    // Initialize to initial values
    void SetInitialValues();

    // True if the effective background image position described by this depends
    // on the size of the corresponding frame.
    bool DependsOnPositioningAreaSize() const {
      return mXPosition.mPercent != 0.0f || mYPosition.mPercent != 0.0f;
    }

    bool operator==(const Position& aOther) const {
      return mXPosition == aOther.mXPosition &&
             mYPosition == aOther.mYPosition;
    }
    bool operator!=(const Position& aOther) const {
      return !(*this == aOther);
    }
  };

  struct Size;
  friend struct Size;
  struct Size {
    struct Dimension : public nsStyleCoord::Calc {
      nscoord ResolveLengthPercentage(nscoord aAvailable) const {
        double d = double(mPercent) * double(aAvailable) + double(mLength);
        if (d < 0.0)
          return 0;
        return NSToCoordRoundWithClamp(float(d));
      }
    };
    Dimension mWidth, mHeight;

    nscoord ResolveWidthLengthPercentage(const nsSize& aBgPositioningArea) const {
      NS_ABORT_IF_FALSE(mWidthType == eLengthPercentage,
                        "resolving non-length/percent dimension!");
      return mWidth.ResolveLengthPercentage(aBgPositioningArea.width);
    }

    nscoord ResolveHeightLengthPercentage(const nsSize& aBgPositioningArea) const {
      NS_ABORT_IF_FALSE(mHeightType == eLengthPercentage,
                        "resolving non-length/percent dimension!");
      return mHeight.ResolveLengthPercentage(aBgPositioningArea.height);
    }

    // Except for eLengthPercentage, Dimension types which might change
    // how a layer is painted when the corresponding frame's dimensions
    // change *must* precede all dimension types which are agnostic to
    // frame size; see DependsOnDependsOnPositioningAreaSizeSize.
    enum DimensionType {
      // If one of mWidth and mHeight is eContain or eCover, then both are.
      // Also, these two values must equal the corresponding values in
      // kBackgroundSizeKTable.
      eContain, eCover,

      eAuto,
      eLengthPercentage,
      eDimensionType_COUNT
    };
    uint8_t mWidthType, mHeightType;

    // True if the effective image size described by this depends on the size of
    // the corresponding frame, when aImage (which must not have null type) is
    // the background image.
    bool DependsOnPositioningAreaSize(const nsStyleImage& aImage) const;

    // Initialize nothing
    Size() {}

    // Initialize to initial values
    void SetInitialValues();

    bool operator==(const Size& aOther) const;
    bool operator!=(const Size& aOther) const {
      return !(*this == aOther);
    }
  };
  
  struct Repeat;
  friend struct Repeat;
  struct Repeat {
    uint8_t mXRepeat, mYRepeat;
    
    // Initialize nothing
    Repeat() {}

    // Initialize to initial values
    void SetInitialValues();

    bool operator==(const Repeat& aOther) const {
      return mXRepeat == aOther.mXRepeat &&
             mYRepeat == aOther.mYRepeat;
    }
    bool operator!=(const Repeat& aOther) const {
      return !(*this == aOther);
    }
  };

  struct Layer;
  friend struct Layer;
  struct Layer {
    uint8_t mAttachment;                // [reset] See nsStyleConsts.h
    uint8_t mClip;                      // [reset] See nsStyleConsts.h
    uint8_t mOrigin;                    // [reset] See nsStyleConsts.h
    Repeat mRepeat;                     // [reset] See nsStyleConsts.h
    Position mPosition;                 // [reset]
    nsStyleImage mImage;                // [reset]
    Size mSize;                         // [reset]

    // Initializes only mImage
    Layer();
    ~Layer();

    // Register/unregister images with the document. We do this only
    // after the dust has settled in ComputeBackgroundData.
    void TrackImages(nsPresContext* aContext) {
      if (mImage.GetType() == eStyleImageType_Image)
        mImage.TrackImage(aContext);
    }
    void UntrackImages(nsPresContext* aContext) {
      if (mImage.GetType() == eStyleImageType_Image)
        mImage.UntrackImage(aContext);
    }

    void SetInitialValues();

    // True if the rendering of this layer might change when the size
    // of the background positioning area changes.  This is true for any
    // non-solid-color background whose position or size depends on
    // the size of the positioning area.  It's also true for SVG images
    // whose root <svg> node has a viewBox.
    bool RenderingMightDependOnPositioningAreaSizeChange() const;

    // An equality operator that compares the images using URL-equality
    // rather than pointer-equality.
    bool operator==(const Layer& aOther) const;
    bool operator!=(const Layer& aOther) const {
      return !(*this == aOther);
    }
  };

  // The (positive) number of computed values of each property, since
  // the lengths of the lists are independent.
  uint32_t mAttachmentCount,
           mClipCount,
           mOriginCount,
           mRepeatCount,
           mPositionCount,
           mImageCount,
           mSizeCount;
  // Layers are stored in an array, matching the top-to-bottom order in
  // which they are specified in CSS.  The number of layers to be used
  // should come from the background-image property.  We create
  // additional |Layer| objects for *any* property, not just
  // background-image.  This means that the bottommost layer that
  // callers in layout care about (which is also the one whose
  // background-clip applies to the background-color) may not be last
  // layer.  In layers below the bottom layer, properties will be
  // uninitialized unless their count, above, indicates that they are
  // present.
  nsAutoTArray<Layer, 1> mLayers;

  const Layer& BottomLayer() const { return mLayers[mImageCount - 1]; }

  #define NS_FOR_VISIBLE_BACKGROUND_LAYERS_BACK_TO_FRONT(var_, stylebg_) \
    for (uint32_t var_ = (stylebg_) ? (stylebg_)->mImageCount : 1; var_-- != 0; )
  #define NS_FOR_VISIBLE_BACKGROUND_LAYERS_BACK_TO_FRONT_WITH_RANGE(var_, stylebg_, start_, count_) \
    NS_ASSERTION((int32_t)(start_) >= 0 && (uint32_t)(start_) < ((stylebg_) ? (stylebg_)->mImageCount : 1), "Invalid layer start!"); \
    NS_ASSERTION((count_) > 0 && (count_) <= (start_) + 1, "Invalid layer range!"); \
    for (uint32_t var_ = (start_) + 1; var_-- != (uint32_t)((start_) + 1 - (count_)); )

  nscolor mBackgroundColor;       // [reset]

  // FIXME: This (now background-break in css3-background) should
  // probably move into a different struct so that everything in
  // nsStyleBackground is set by the background shorthand.
  uint8_t mBackgroundInlinePolicy; // [reset] See nsStyleConsts.h

  // True if this background is completely transparent.
  bool IsTransparent() const;

  // We have to take slower codepaths for fixed background attachment,
  // but we don't want to do that when there's no image.
  // Not inline because it uses an nsCOMPtr<imgIRequest>
  // FIXME: Should be in nsStyleStructInlines.h.
  bool HasFixedBackground() const;
};

// See https://bugzilla.mozilla.org/show_bug.cgi?id=271586#c43 for why
// this is hard to replace with 'currentColor'.
#define BORDER_COLOR_FOREGROUND   0x20
#define OUTLINE_COLOR_INITIAL     0x80
// FOREGROUND | INITIAL(OUTLINE)
#define BORDER_COLOR_SPECIAL      0xA0
#define BORDER_STYLE_MASK         0x1F

#define NS_SPACING_MARGIN   0
#define NS_SPACING_PADDING  1
#define NS_SPACING_BORDER   2


struct nsStyleMargin {
  nsStyleMargin(void);
  nsStyleMargin(const nsStyleMargin& aMargin);
  ~nsStyleMargin(void) {
    MOZ_COUNT_DTOR(nsStyleMargin);
  }

  void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW;
  void Destroy(nsPresContext* aContext);

  void RecalcData();
  nsChangeHint CalcDifference(const nsStyleMargin& aOther) const;
  static nsChangeHint MaxDifference() {
    return NS_SubtractHint(NS_STYLE_HINT_REFLOW,
                           NS_CombineHint(nsChangeHint_ClearDescendantIntrinsics,
                                          nsChangeHint_NeedDirtyReflow));
  }

  nsStyleSides  mMargin;          // [reset] coord, percent, calc, auto

  bool IsWidthDependent() const { return !mHasCachedMargin; }
  bool GetMargin(nsMargin& aMargin) const
  {
    if (mHasCachedMargin) {
      aMargin = mCachedMargin;
      return true;
    }
    return false;
  }

protected:
  bool          mHasCachedMargin;
  nsMargin      mCachedMargin;
};


struct nsStylePadding {
  nsStylePadding(void);
  nsStylePadding(const nsStylePadding& aPadding);
  ~nsStylePadding(void) {
    MOZ_COUNT_DTOR(nsStylePadding);
  }

  void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW;
  void Destroy(nsPresContext* aContext);

  void RecalcData();
  nsChangeHint CalcDifference(const nsStylePadding& aOther) const;
  static nsChangeHint MaxDifference() {
    return NS_SubtractHint(NS_STYLE_HINT_REFLOW,
                           nsChangeHint_ClearDescendantIntrinsics);
  }

  nsStyleSides  mPadding;         // [reset] coord, percent, calc

  bool IsWidthDependent() const { return !mHasCachedPadding; }
  bool GetPadding(nsMargin& aPadding) const
  {
    if (mHasCachedPadding) {
      aPadding = mCachedPadding;
      return true;
    }
    return false;
  }

protected:
  bool          mHasCachedPadding;
  nsMargin      mCachedPadding;
};

struct nsBorderColors {
  nsBorderColors* mNext;
  nscolor mColor;

  nsBorderColors() : mNext(nullptr), mColor(NS_RGB(0,0,0)) {}
  nsBorderColors(const nscolor& aColor) : mNext(nullptr), mColor(aColor) {}
  ~nsBorderColors();

  nsBorderColors* Clone() const { return Clone(true); }

  static bool Equal(const nsBorderColors* c1,
                      const nsBorderColors* c2) {
    if (c1 == c2)
      return true;
    while (c1 && c2) {
      if (c1->mColor != c2->mColor)
        return false;
      c1 = c1->mNext;
      c2 = c2->mNext;
    }
    // both should be NULL if these are equal, otherwise one
    // has more colors than another
    return !c1 && !c2;
  }

private:
  nsBorderColors* Clone(bool aDeep) const;
};

struct nsCSSShadowItem {
  nscoord mXOffset;
  nscoord mYOffset;
  nscoord mRadius;
  nscoord mSpread;

  nscolor      mColor;
  bool mHasColor; // Whether mColor should be used
  bool mInset;

  nsCSSShadowItem() : mHasColor(false) {
    MOZ_COUNT_CTOR(nsCSSShadowItem);
  }
  ~nsCSSShadowItem() {
    MOZ_COUNT_DTOR(nsCSSShadowItem);
  }

  bool operator==(const nsCSSShadowItem& aOther) {
    return (mXOffset == aOther.mXOffset &&
            mYOffset == aOther.mYOffset &&
            mRadius == aOther.mRadius &&
            mHasColor == aOther.mHasColor &&
            mSpread == aOther.mSpread &&
            mInset == aOther.mInset &&
            (!mHasColor || mColor == aOther.mColor));
  }
  bool operator!=(const nsCSSShadowItem& aOther) {
    return !(*this == aOther);
  }
};

class nsCSSShadowArray {
  public:
    void* operator new(size_t aBaseSize, uint32_t aArrayLen) {
      // We can allocate both this nsCSSShadowArray and the
      // actual array in one allocation. The amount of memory to
      // allocate is equal to the class's size + the number of bytes for all
      // but the first array item (because aBaseSize includes one
      // item, see the private declarations)
      return ::operator new(aBaseSize +
                            (aArrayLen - 1) * sizeof(nsCSSShadowItem));
    }

    nsCSSShadowArray(uint32_t aArrayLen) :
      mLength(aArrayLen)
    {
      MOZ_COUNT_CTOR(nsCSSShadowArray);
      for (uint32_t i = 1; i < mLength; ++i) {
        // Make sure we call the constructors of each nsCSSShadowItem
        // (the first one is called for us because we declared it under private)
        new (&mArray[i]) nsCSSShadowItem();
      }
    }
    ~nsCSSShadowArray() {
      MOZ_COUNT_DTOR(nsCSSShadowArray);
      for (uint32_t i = 1; i < mLength; ++i) {
        mArray[i].~nsCSSShadowItem();
      }
    }

    uint32_t Length() const { return mLength; }
    nsCSSShadowItem* ShadowAt(uint32_t i) {
      NS_ABORT_IF_FALSE(i < mLength, "Accessing too high an index in the text shadow array!");
      return &mArray[i];
    }
    const nsCSSShadowItem* ShadowAt(uint32_t i) const {
      NS_ABORT_IF_FALSE(i < mLength, "Accessing too high an index in the text shadow array!");
      return &mArray[i];
    }

    bool HasShadowWithInset(bool aInset) {
      for (uint32_t i = 0; i < mLength; ++i) {
        if (mArray[i].mInset == aInset)
          return true;
      }
      return false;
    }

    NS_INLINE_DECL_REFCOUNTING(nsCSSShadowArray)

  private:
    uint32_t mLength;
    nsCSSShadowItem mArray[1]; // This MUST be the last item
};

// Border widths are rounded to the nearest-below integer number of pixels,
// but values between zero and one device pixels are always rounded up to
// one device pixel.
#define NS_ROUND_BORDER_TO_PIXELS(l,tpp) \
  ((l) == 0) ? 0 : std::max((tpp), (l) / (tpp) * (tpp))
// Outline offset is rounded to the nearest integer number of pixels, but values
// between zero and one device pixels are always rounded up to one device pixel.
// Note that the offset can be negative.
#define NS_ROUND_OFFSET_TO_PIXELS(l,tpp) \
  (((l) == 0) ? 0 : \
    ((l) > 0) ? std::max( (tpp), ((l) + ((tpp) / 2)) / (tpp) * (tpp)) : \
                std::min(-(tpp), ((l) - ((tpp) / 2)) / (tpp) * (tpp)))

// Returns if the given border style type is visible or not
static bool IsVisibleBorderStyle(uint8_t aStyle)
{
  return (aStyle != NS_STYLE_BORDER_STYLE_NONE &&
          aStyle != NS_STYLE_BORDER_STYLE_HIDDEN);
}

struct nsStyleBorder {
  nsStyleBorder(nsPresContext* aContext);
  nsStyleBorder(const nsStyleBorder& aBorder);
  ~nsStyleBorder();

  void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW;
  void Destroy(nsPresContext* aContext);

  nsChangeHint CalcDifference(const nsStyleBorder& aOther) const;
  static nsChangeHint MaxDifference() {
    return NS_CombineHint(NS_STYLE_HINT_REFLOW,
                          nsChangeHint_BorderStyleNoneChange);
  }

  void EnsureBorderColors() {
    if (!mBorderColors) {
      mBorderColors = new nsBorderColors*[4];
      if (mBorderColors)
        for (int32_t i = 0; i < 4; i++)
          mBorderColors[i] = nullptr;
    }
  }

  void ClearBorderColors(mozilla::css::Side aSide) {
    if (mBorderColors && mBorderColors[aSide]) {
      delete mBorderColors[aSide];
      mBorderColors[aSide] = nullptr;
    }
  }

  // Return whether aStyle is a visible style.  Invisible styles cause
  // the relevant computed border width to be 0.
  // Note that this does *not* consider the effects of 'border-image':
  // if border-style is none, but there is a loaded border image,
  // HasVisibleStyle will be false even though there *is* a border.
  bool HasVisibleStyle(mozilla::css::Side aSide) const
  {
    return IsVisibleBorderStyle(GetBorderStyle(aSide));
  }

  // aBorderWidth is in twips
  void SetBorderWidth(mozilla::css::Side aSide, nscoord aBorderWidth)
  {
    nscoord roundedWidth =
      NS_ROUND_BORDER_TO_PIXELS(aBorderWidth, mTwipsPerPixel);
    mBorder.Side(aSide) = roundedWidth;
    if (HasVisibleStyle(aSide))
      mComputedBorder.Side(aSide) = roundedWidth;
  }

  // Get the computed border (plus rounding).  This does consider the
  // effects of 'border-style: none', but does not consider
  // 'border-image'.
  const nsMargin& GetComputedBorder() const
  {
    return mComputedBorder;
  }

  bool HasBorder() const
  {
    return mComputedBorder != nsMargin(0,0,0,0) || mBorderImageSource;
  }

  // Get the actual border width for a particular side, in appunits.  Note that
  // this is zero if and only if there is no border to be painted for this
  // side.  That is, this value takes into account the border style and the
  // value is rounded to the nearest device pixel by NS_ROUND_BORDER_TO_PIXELS.
  nscoord GetComputedBorderWidth(mozilla::css::Side aSide) const
  {
    return GetComputedBorder().Side(aSide);
  }

  uint8_t GetBorderStyle(mozilla::css::Side aSide) const
  {
    NS_ASSERTION(aSide <= NS_SIDE_LEFT, "bad side");
    return (mBorderStyle[aSide] & BORDER_STYLE_MASK);
  }

  void SetBorderStyle(mozilla::css::Side aSide, uint8_t aStyle)
  {
    NS_ASSERTION(aSide <= NS_SIDE_LEFT, "bad side");
    mBorderStyle[aSide] &= ~BORDER_STYLE_MASK;
    mBorderStyle[aSide] |= (aStyle & BORDER_STYLE_MASK);
    mComputedBorder.Side(aSide) =
      (HasVisibleStyle(aSide) ? mBorder.Side(aSide) : 0);
  }

  // Defined in nsStyleStructInlines.h
  inline bool IsBorderImageLoaded() const;
  inline nsresult RequestDecode();

  void GetBorderColor(mozilla::css::Side aSide, nscolor& aColor,
                      bool& aForeground) const
  {
    aForeground = false;
    NS_ASSERTION(aSide <= NS_SIDE_LEFT, "bad side");
    if ((mBorderStyle[aSide] & BORDER_COLOR_SPECIAL) == 0)
      aColor = mBorderColor[aSide];
    else if (mBorderStyle[aSide] & BORDER_COLOR_FOREGROUND)
      aForeground = true;
    else
      NS_NOTREACHED("OUTLINE_COLOR_INITIAL should not be set here");
  }

  void SetBorderColor(mozilla::css::Side aSide, nscolor aColor)
  {
    NS_ASSERTION(aSide <= NS_SIDE_LEFT, "bad side");
    mBorderColor[aSide] = aColor;
    mBorderStyle[aSide] &= ~BORDER_COLOR_SPECIAL;
  }

  // These are defined in nsStyleStructInlines.h
  inline void SetBorderImage(imgRequestProxy* aImage);
  inline imgRequestProxy* GetBorderImage() const;

  bool HasBorderImage() {return !!mBorderImageSource;}

  void TrackImage(nsPresContext* aContext);
  void UntrackImage(nsPresContext* aContext);

  nsMargin GetImageOutset() const;

  // These methods are used for the caller to caches the sub images created during
  // a border-image paint operation
  inline void SetSubImage(uint8_t aIndex, imgIContainer* aSubImage) const;
  inline imgIContainer* GetSubImage(uint8_t aIndex) const;

  void GetCompositeColors(int32_t aIndex, nsBorderColors** aColors) const
  {
    if (!mBorderColors)
      *aColors = nullptr;
    else
      *aColors = mBorderColors[aIndex];
  }

  void AppendBorderColor(int32_t aIndex, nscolor aColor)
  {
    NS_ASSERTION(aIndex >= 0 && aIndex <= 3, "bad side for composite border color");
    nsBorderColors* colorEntry = new nsBorderColors(aColor);
    if (!mBorderColors[aIndex])
      mBorderColors[aIndex] = colorEntry;
    else {
      nsBorderColors* last = mBorderColors[aIndex];
      while (last->mNext)
        last = last->mNext;
      last->mNext = colorEntry;
    }
    mBorderStyle[aIndex] &= ~BORDER_COLOR_SPECIAL;
  }

  void SetBorderToForeground(mozilla::css::Side aSide)
  {
    NS_ASSERTION(aSide <= NS_SIDE_LEFT, "bad side");
    mBorderStyle[aSide] &= ~BORDER_COLOR_SPECIAL;
    mBorderStyle[aSide] |= BORDER_COLOR_FOREGROUND;
  }

public:
  nsBorderColors** mBorderColors;        // [reset] composite (stripe) colors
  nsRefPtr<nsCSSShadowArray> mBoxShadow; // [reset] NULL for 'none'

#ifdef DEBUG
  bool mImageTracked;
#endif

protected:
  nsRefPtr<imgRequestProxy> mBorderImageSource; // [reset]

public:
  nsStyleCorners mBorderRadius;       // [reset] coord, percent
  nsStyleSides   mBorderImageSlice;   // [reset] factor, percent
  nsStyleSides   mBorderImageWidth;   // [reset] length, factor, percent, auto
  nsStyleSides   mBorderImageOutset;  // [reset] length, factor

  uint8_t        mBorderImageFill;    // [reset]
  uint8_t        mBorderImageRepeatH; // [reset] see nsStyleConsts.h
  uint8_t        mBorderImageRepeatV; // [reset]
  uint8_t        mFloatEdge;          // [reset]

protected:
  // mComputedBorder holds the CSS2.1 computed border-width values.
  // In particular, these widths take into account the border-style
  // for the relevant side, and the values are rounded to the nearest
  // device pixel (which is not part of the definition of computed
  // values). The presence or absence of a border-image does not
  // affect border-width values.
  nsMargin      mComputedBorder;

  // mBorder holds the nscoord values for the border widths as they
  // would be if all the border-style values were visible (not hidden
  // or none).  This member exists so that when we create structs
  // using the copy constructor during style resolution the new
  // structs will know what the specified values of the border were in
  // case they have more specific rules setting the border style.
  //
  // Note that this isn't quite the CSS specified value, since this
  // has had the enumerated border widths converted to lengths, and
  // all lengths converted to twips.  But it's not quite the computed
  // value either. The values are rounded to the nearest device pixel.
  nsMargin      mBorder;

  uint8_t       mBorderStyle[4];  // [reset] See nsStyleConsts.h
  nscolor       mBorderColor[4];  // [reset] the colors to use for a simple
                                  // border.  not used for -moz-border-colors
private:
  // Cache used by callers for border-image painting
  nsCOMArray<imgIContainer> mSubImages;

  nscoord       mTwipsPerPixel;

  nsStyleBorder& operator=(const nsStyleBorder& aOther) MOZ_DELETE;
};


struct nsStyleOutline {
  nsStyleOutline(nsPresContext* aPresContext);
  nsStyleOutline(const nsStyleOutline& aOutline);
  ~nsStyleOutline(void) {
    MOZ_COUNT_DTOR(nsStyleOutline);
  }

  void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
    return aContext->AllocateFromShell(sz);
  }
  void Destroy(nsPresContext* aContext) {
    this->~nsStyleOutline();
    aContext->FreeToShell(sizeof(nsStyleOutline), this);
  }

  void RecalcData(nsPresContext* aContext);
  nsChangeHint CalcDifference(const nsStyleOutline& aOther) const;
  static nsChangeHint MaxDifference() {
    return NS_CombineHint(nsChangeHint_AllReflowHints,
                          nsChangeHint_RepaintFrame);
  }

  nsStyleCorners  mOutlineRadius; // [reset] coord, percent, calc

  // Note that this is a specified value.  You can get the actual values
  // with GetOutlineWidth.  You cannot get the computed value directly.
  nsStyleCoord  mOutlineWidth;    // [reset] coord, enum (see nsStyleConsts.h)
  nscoord       mOutlineOffset;   // [reset]

  bool GetOutlineWidth(nscoord& aWidth) const
  {
    if (mHasCachedOutline) {
      aWidth = mCachedOutlineWidth;
      return true;
    }
    return false;
  }

  uint8_t GetOutlineStyle(void) const
  {
    return (mOutlineStyle & BORDER_STYLE_MASK);
  }

  void SetOutlineStyle(uint8_t aStyle)
  {
    mOutlineStyle &= ~BORDER_STYLE_MASK;
    mOutlineStyle |= (aStyle & BORDER_STYLE_MASK);
  }

  // false means initial value
  bool GetOutlineColor(nscolor& aColor) const
  {
    if ((mOutlineStyle & BORDER_COLOR_SPECIAL) == 0) {
      aColor = mOutlineColor;
      return true;
    }
    return false;
  }

  void SetOutlineColor(nscolor aColor)
  {
    mOutlineColor = aColor;
    mOutlineStyle &= ~BORDER_COLOR_SPECIAL;
  }

  void SetOutlineInitialColor()
  {
    mOutlineStyle |= OUTLINE_COLOR_INITIAL;
  }

  bool GetOutlineInitialColor() const
  {
    return !!(mOutlineStyle & OUTLINE_COLOR_INITIAL);
  }

protected:
  // This value is the actual value, so it's rounded to the nearest device
  // pixel.
  nscoord       mCachedOutlineWidth;

  nscolor       mOutlineColor;    // [reset]

  bool          mHasCachedOutline;
  uint8_t       mOutlineStyle;    // [reset] See nsStyleConsts.h

  nscoord       mTwipsPerPixel;
};


struct nsStyleList {
  nsStyleList(void);
  nsStyleList(const nsStyleList& aStyleList);
  ~nsStyleList(void);

  void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
    return aContext->AllocateFromShell(sz);
  }
  void Destroy(nsPresContext* aContext) {
    this->~nsStyleList();
    aContext->FreeToShell(sizeof(nsStyleList), this);
  }

  nsChangeHint CalcDifference(const nsStyleList& aOther) const;
  static nsChangeHint MaxDifference() {
    return NS_STYLE_HINT_FRAMECHANGE;
  }

  imgRequestProxy* GetListStyleImage() const { return mListStyleImage; }
  void SetListStyleImage(imgRequestProxy* aReq)
  {
    if (mListStyleImage)
      mListStyleImage->UnlockImage();
    mListStyleImage = aReq;
    if (mListStyleImage)
      mListStyleImage->LockImage();
  }

  uint8_t   mListStyleType;             // [inherited] See nsStyleConsts.h
  uint8_t   mListStylePosition;         // [inherited]
private:
  nsRefPtr<imgRequestProxy> mListStyleImage; // [inherited]
  nsStyleList& operator=(const nsStyleList& aOther) MOZ_DELETE;
public:
  nsRect        mImageRegion;           // [inherited] the rect to use within an image
};

struct nsStylePosition {
  nsStylePosition(void);
  nsStylePosition(const nsStylePosition& aOther);
  ~nsStylePosition(void);

  void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
    return aContext->AllocateFromShell(sz);
  }
  void Destroy(nsPresContext* aContext) {
    this->~nsStylePosition();
    aContext->FreeToShell(sizeof(nsStylePosition), this);
  }

  nsChangeHint CalcDifference(const nsStylePosition& aOther) const;
  static nsChangeHint MaxDifference() {
    return NS_CombineHint(NS_STYLE_HINT_REFLOW,
                          nsChangeHint(nsChangeHint_RecomputePosition |
                                       nsChangeHint_UpdateOverflow));
  }

  nsStyleSides  mOffset;                // [reset] coord, percent, calc, auto
  nsStyleCoord  mWidth;                 // [reset] coord, percent, enum, calc, auto
  nsStyleCoord  mMinWidth;              // [reset] coord, percent, enum, calc
  nsStyleCoord  mMaxWidth;              // [reset] coord, percent, enum, calc, none
  nsStyleCoord  mHeight;                // [reset] coord, percent, calc, auto
  nsStyleCoord  mMinHeight;             // [reset] coord, percent, calc
  nsStyleCoord  mMaxHeight;             // [reset] coord, percent, calc, none
  nsStyleCoord  mFlexBasis;             // [reset] coord, percent, enum, calc, auto
  uint8_t       mBoxSizing;             // [reset] see nsStyleConsts.h
  uint8_t       mAlignItems;            // [reset] see nsStyleConsts.h
  uint8_t       mAlignSelf;             // [reset] see nsStyleConsts.h
  uint8_t       mFlexDirection;         // [reset] see nsStyleConsts.h
  uint8_t       mJustifyContent;        // [reset] see nsStyleConsts.h
  int32_t       mOrder;                 // [reset] integer
  float         mFlexGrow;              // [reset] float
  float         mFlexShrink;            // [reset] float
  nsStyleCoord  mZIndex;                // [reset] integer, auto

  bool WidthDependsOnContainer() const
    { return WidthCoordDependsOnContainer(mWidth); }
  bool MinWidthDependsOnContainer() const
    { return WidthCoordDependsOnContainer(mMinWidth); }
  bool MaxWidthDependsOnContainer() const
    { return WidthCoordDependsOnContainer(mMaxWidth); }

  // Note that these functions count 'auto' as depending on the
  // container since that's the case for absolutely positioned elements.
  // However, some callers do not care about this case and should check
  // for it, since it is the most common case.
  // FIXME: We should probably change the assumption to be the other way
  // around.
  bool HeightDependsOnContainer() const
    { return HeightCoordDependsOnContainer(mHeight); }
  bool MinHeightDependsOnContainer() const
    { return HeightCoordDependsOnContainer(mMinHeight); }
  bool MaxHeightDependsOnContainer() const
    { return HeightCoordDependsOnContainer(mMaxHeight); }

  bool OffsetHasPercent(mozilla::css::Side aSide) const
  {
    return mOffset.Get(aSide).HasPercent();
  }

private:
  static bool WidthCoordDependsOnContainer(const nsStyleCoord &aCoord);
  static bool HeightCoordDependsOnContainer(const nsStyleCoord &aCoord)
  {
    return aCoord.GetUnit() == eStyleUnit_Auto || // CSS 2.1, 10.6.4, item (5)
           aCoord.HasPercent();
  }
};

struct nsStyleTextOverflowSide {
  nsStyleTextOverflowSide() : mType(NS_STYLE_TEXT_OVERFLOW_CLIP) {}

  bool operator==(const nsStyleTextOverflowSide& aOther) const {
    return mType == aOther.mType &&
           (mType != NS_STYLE_TEXT_OVERFLOW_STRING ||
            mString == aOther.mString);
  }
  bool operator!=(const nsStyleTextOverflowSide& aOther) const {
    return !(*this == aOther);
  }

  nsString mString;
  uint8_t  mType;
};

struct nsStyleTextOverflow {
  nsStyleTextOverflow() : mLogicalDirections(true) {}
  bool operator==(const nsStyleTextOverflow& aOther) const {
    return mLeft == aOther.mLeft && mRight == aOther.mRight;
  }
  bool operator!=(const nsStyleTextOverflow& aOther) const {
    return !(*this == aOther);
  }

  // Returns the value to apply on the left side.
  const nsStyleTextOverflowSide& GetLeft(uint8_t aDirection) const {
    NS_ASSERTION(aDirection == NS_STYLE_DIRECTION_LTR ||
                 aDirection == NS_STYLE_DIRECTION_RTL, "bad direction");
    return !mLogicalDirections || aDirection == NS_STYLE_DIRECTION_LTR ?
             mLeft : mRight;
  }

  // Returns the value to apply on the right side.
  const nsStyleTextOverflowSide& GetRight(uint8_t aDirection) const {
    NS_ASSERTION(aDirection == NS_STYLE_DIRECTION_LTR ||
                 aDirection == NS_STYLE_DIRECTION_RTL, "bad direction");
    return !mLogicalDirections || aDirection == NS_STYLE_DIRECTION_LTR ?
             mRight : mLeft;
  }

  // Returns the first value that was specified.
  const nsStyleTextOverflowSide* GetFirstValue() const {
    return mLogicalDirections ? &mRight : &mLeft;
  }

  // Returns the second value, or null if there was only one value specified.
  const nsStyleTextOverflowSide* GetSecondValue() const {
    return mLogicalDirections ? nullptr : &mRight;
  }

  nsStyleTextOverflowSide mLeft;  // start side when mLogicalDirections is true
  nsStyleTextOverflowSide mRight; // end side when mLogicalDirections is true
  bool mLogicalDirections;  // true when only one value was specified
};

struct nsStyleTextReset {
  nsStyleTextReset(void);
  nsStyleTextReset(const nsStyleTextReset& aOther);
  ~nsStyleTextReset(void);

  void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
    return aContext->AllocateFromShell(sz);
  }
  void Destroy(nsPresContext* aContext) {
    this->~nsStyleTextReset();
    aContext->FreeToShell(sizeof(nsStyleTextReset), this);
  }

  uint8_t GetDecorationStyle() const
  {
    return (mTextDecorationStyle & BORDER_STYLE_MASK);
  }

  void SetDecorationStyle(uint8_t aStyle)
  {
    NS_ABORT_IF_FALSE((aStyle & BORDER_STYLE_MASK) == aStyle,
                      "style doesn't fit");
    mTextDecorationStyle &= ~BORDER_STYLE_MASK;
    mTextDecorationStyle |= (aStyle & BORDER_STYLE_MASK);
  }

  void GetDecorationColor(nscolor& aColor, bool& aForeground) const
  {
    aForeground = false;
    if ((mTextDecorationStyle & BORDER_COLOR_SPECIAL) == 0) {
      aColor = mTextDecorationColor;
    } else if (mTextDecorationStyle & BORDER_COLOR_FOREGROUND) {
      aForeground = true;
    } else {
      NS_NOTREACHED("OUTLINE_COLOR_INITIAL should not be set here");
    }
  }

  void SetDecorationColor(nscolor aColor)
  {
    mTextDecorationColor = aColor;
    mTextDecorationStyle &= ~BORDER_COLOR_SPECIAL;
  }

  void SetDecorationColorToForeground()
  {
    mTextDecorationStyle &= ~BORDER_COLOR_SPECIAL;
    mTextDecorationStyle |= BORDER_COLOR_FOREGROUND;
  }

  nsChangeHint CalcDifference(const nsStyleTextReset& aOther) const;
  static nsChangeHint MaxDifference() {
    return NS_STYLE_HINT_REFLOW;
  }

  nsStyleCoord  mVerticalAlign;         // [reset] coord, percent, calc, enum (see nsStyleConsts.h)
  nsStyleTextOverflow mTextOverflow;    // [reset] enum, string

  uint8_t mTextBlink;                   // [reset] see nsStyleConsts.h
  uint8_t mTextDecorationLine;          // [reset] see nsStyleConsts.h
  uint8_t mUnicodeBidi;                 // [reset] see nsStyleConsts.h
protected:
  uint8_t mTextDecorationStyle;         // [reset] see nsStyleConsts.h

  nscolor mTextDecorationColor;         // [reset] the colors to use for a decoration lines, not used at currentColor
};

struct nsStyleText {
  nsStyleText(void);
  nsStyleText(const nsStyleText& aOther);
  ~nsStyleText(void);

  void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
    return aContext->AllocateFromShell(sz);
  }
  void Destroy(nsPresContext* aContext) {
    this->~nsStyleText();
    aContext->FreeToShell(sizeof(nsStyleText), this);
  }

  nsChangeHint CalcDifference(const nsStyleText& aOther) const;
  static nsChangeHint MaxDifference() {
    return NS_STYLE_HINT_FRAMECHANGE;
  }

  uint8_t mTextAlign;                   // [inherited] see nsStyleConsts.h
  uint8_t mTextAlignLast;               // [inherited] see nsStyleConsts.h
  uint8_t mTextTransform;               // [inherited] see nsStyleConsts.h
  uint8_t mWhiteSpace;                  // [inherited] see nsStyleConsts.h
  uint8_t mWordBreak;                   // [inherited] see nsStyleConsts.h
  uint8_t mWordWrap;                    // [inherited] see nsStyleConsts.h
  uint8_t mHyphens;                     // [inherited] see nsStyleConsts.h
  uint8_t mTextSizeAdjust;              // [inherited] see nsStyleConsts.h
  int32_t mTabSize;                     // [inherited] see nsStyleConsts.h

  nscoord mWordSpacing;                 // [inherited]
  nsStyleCoord  mLetterSpacing;         // [inherited] coord, normal
  nsStyleCoord  mLineHeight;            // [inherited] coord, factor, normal
  nsStyleCoord  mTextIndent;            // [inherited] coord, percent, calc

  nsRefPtr<nsCSSShadowArray> mTextShadow; // [inherited] NULL in case of a zero-length

  bool WhiteSpaceIsSignificant() const {
    return mWhiteSpace == NS_STYLE_WHITESPACE_PRE ||
           mWhiteSpace == NS_STYLE_WHITESPACE_PRE_WRAP ||
           mWhiteSpace == NS_STYLE_WHITESPACE_PRE_DISCARD_NEWLINES;
  }

  bool NewlineIsSignificant() const {
    return mWhiteSpace == NS_STYLE_WHITESPACE_PRE ||
           mWhiteSpace == NS_STYLE_WHITESPACE_PRE_WRAP ||
           mWhiteSpace == NS_STYLE_WHITESPACE_PRE_LINE;
  }

  bool NewlineIsDiscarded() const {
    return mWhiteSpace == NS_STYLE_WHITESPACE_PRE_DISCARD_NEWLINES;
  }

  bool WhiteSpaceOrNewlineIsSignificant() const {
    return mWhiteSpace == NS_STYLE_WHITESPACE_PRE ||
           mWhiteSpace == NS_STYLE_WHITESPACE_PRE_WRAP ||
           mWhiteSpace == NS_STYLE_WHITESPACE_PRE_LINE ||
           mWhiteSpace == NS_STYLE_WHITESPACE_PRE_DISCARD_NEWLINES;
  }

  bool WhiteSpaceCanWrapStyle() const {
    return mWhiteSpace == NS_STYLE_WHITESPACE_NORMAL ||
           mWhiteSpace == NS_STYLE_WHITESPACE_PRE_WRAP ||
           mWhiteSpace == NS_STYLE_WHITESPACE_PRE_LINE;
  }

  bool WordCanWrapStyle() const {
    return WhiteSpaceCanWrapStyle() &&
           mWordWrap == NS_STYLE_WORDWRAP_BREAK_WORD;
  }

  // These are defined in nsStyleStructInlines.h.

  // The aContextFrame argument on each of these is the frame this
  // style struct is for.  If the frame is for SVG text, the return
  // value will be massaged to be something that makes sense for
  // SVG text.
  inline bool HasTextShadow(const nsIFrame* aContextFrame) const;
  inline nsCSSShadowArray* GetTextShadow(const nsIFrame* aContextFrame) const;
  inline bool WhiteSpaceCanWrap(const nsIFrame* aContextFrame) const;
  inline bool WordCanWrap(const nsIFrame* aContextFrame) const;
};

struct nsStyleVisibility {
  nsStyleVisibility(nsPresContext* aPresContext);
  nsStyleVisibility(const nsStyleVisibility& aVisibility);
  ~nsStyleVisibility() {
    MOZ_COUNT_DTOR(nsStyleVisibility);
  }

  void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
    return aContext->AllocateFromShell(sz);
  }
  void Destroy(nsPresContext* aContext) {
    this->~nsStyleVisibility();
    aContext->FreeToShell(sizeof(nsStyleVisibility), this);
  }

  nsChangeHint CalcDifference(const nsStyleVisibility& aOther) const;
  static nsChangeHint MaxDifference() {
    return NS_STYLE_HINT_FRAMECHANGE;
  }

  uint8_t mDirection;                  // [inherited] see nsStyleConsts.h NS_STYLE_DIRECTION_*
  uint8_t mVisible;                    // [inherited]
  uint8_t mPointerEvents;              // [inherited] see nsStyleConsts.h
  uint8_t mWritingMode;                // [inherited] see nsStyleConsts.h

  bool IsVisible() const {
    return (mVisible == NS_STYLE_VISIBILITY_VISIBLE);
  }

  bool IsVisibleOrCollapsed() const {
    return ((mVisible == NS_STYLE_VISIBILITY_VISIBLE) ||
            (mVisible == NS_STYLE_VISIBILITY_COLLAPSE));
  }

  inline uint8_t GetEffectivePointerEvents(nsIFrame* aFrame) const;
};

struct nsTimingFunction {
  enum Type { Function, StepStart, StepEnd };

  explicit nsTimingFunction(int32_t aTimingFunctionType
                              = NS_STYLE_TRANSITION_TIMING_FUNCTION_EASE)
  {
    AssignFromKeyword(aTimingFunctionType);
  }

  nsTimingFunction(float x1, float y1, float x2, float y2)
    : mType(Function)
  {
    mFunc.mX1 = x1;
    mFunc.mY1 = y1;
    mFunc.mX2 = x2;
    mFunc.mY2 = y2;
  }

  nsTimingFunction(Type aType, uint32_t aSteps)
    : mType(aType)
  {
    NS_ABORT_IF_FALSE(mType == StepStart || mType == StepEnd, "wrong type");
    mSteps = aSteps;
  }

  nsTimingFunction(const nsTimingFunction& aOther)
  {
    *this = aOther;
  }

  Type mType;
  union {
    struct {
      float mX1;
      float mY1;
      float mX2;
      float mY2;
    } mFunc;
    uint32_t mSteps;
  };

  nsTimingFunction&
  operator=(const nsTimingFunction& aOther)
  {
    if (&aOther == this)
      return *this;

    mType = aOther.mType;

    if (mType == Function) {
      mFunc.mX1 = aOther.mFunc.mX1;
      mFunc.mY1 = aOther.mFunc.mY1;
      mFunc.mX2 = aOther.mFunc.mX2;
      mFunc.mY2 = aOther.mFunc.mY2;
    } else {
      mSteps = aOther.mSteps;
    }

    return *this;
  }

  bool operator==(const nsTimingFunction& aOther) const
  {
    if (mType != aOther.mType) {
      return false;
    }
    if (mType == Function) {
      return mFunc.mX1 == aOther.mFunc.mX1 && mFunc.mY1 == aOther.mFunc.mY1 &&
             mFunc.mX2 == aOther.mFunc.mX2 && mFunc.mY2 == aOther.mFunc.mY2;
    }
    return mSteps == aOther.mSteps;
  }

  bool operator!=(const nsTimingFunction& aOther) const
  {
    return !(*this == aOther);
  }

private:
  void AssignFromKeyword(int32_t aTimingFunctionType);
};

struct nsTransition {
  nsTransition() { /* leaves uninitialized; see also SetInitialValues */ }
  explicit nsTransition(const nsTransition& aCopy);

  void SetInitialValues();

  // Delay and Duration are in milliseconds

  const nsTimingFunction& GetTimingFunction() const { return mTimingFunction; }
  float GetDelay() const { return mDelay; }
  float GetDuration() const { return mDuration; }
  nsCSSProperty GetProperty() const { return mProperty; }
  nsIAtom* GetUnknownProperty() const { return mUnknownProperty; }

  void SetTimingFunction(const nsTimingFunction& aTimingFunction)
    { mTimingFunction = aTimingFunction; }
  void SetDelay(float aDelay) { mDelay = aDelay; }
  void SetDuration(float aDuration) { mDuration = aDuration; }
  void SetProperty(nsCSSProperty aProperty)
    {
      NS_ASSERTION(aProperty != eCSSProperty_UNKNOWN, "invalid property");
      mProperty = aProperty;
    }
  void SetUnknownProperty(const nsAString& aUnknownProperty);
  void CopyPropertyFrom(const nsTransition& aOther)
    {
      mProperty = aOther.mProperty;
      mUnknownProperty = aOther.mUnknownProperty;
    }

  nsTimingFunction& TimingFunctionSlot() { return mTimingFunction; }

private:
  nsTimingFunction mTimingFunction;
  float mDuration;
  float mDelay;
  nsCSSProperty mProperty;
  nsCOMPtr<nsIAtom> mUnknownProperty; // used when mProperty is
                                      // eCSSProperty_UNKNOWN
};

struct nsAnimation {
  nsAnimation() { /* leaves uninitialized; see also SetInitialValues */ }
  explicit nsAnimation(const nsAnimation& aCopy);

  void SetInitialValues();

  // Delay and Duration are in milliseconds

  const nsTimingFunction& GetTimingFunction() const { return mTimingFunction; }
  float GetDelay() const { return mDelay; }
  float GetDuration() const { return mDuration; }
  const nsString& GetName() const { return mName; }
  uint8_t GetDirection() const { return mDirection; }
  uint8_t GetFillMode() const { return mFillMode; }
  uint8_t GetPlayState() const { return mPlayState; }
  float GetIterationCount() const { return mIterationCount; }

  void SetTimingFunction(const nsTimingFunction& aTimingFunction)
    { mTimingFunction = aTimingFunction; }
  void SetDelay(float aDelay) { mDelay = aDelay; }
  void SetDuration(float aDuration) { mDuration = aDuration; }
  void SetName(const nsSubstring& aName) { mName = aName; }
  void SetDirection(uint8_t aDirection) { mDirection = aDirection; }
  void SetFillMode(uint8_t aFillMode) { mFillMode = aFillMode; }
  void SetPlayState(uint8_t aPlayState) { mPlayState = aPlayState; }
  void SetIterationCount(float aIterationCount)
    { mIterationCount = aIterationCount; }

  nsTimingFunction& TimingFunctionSlot() { return mTimingFunction; }

private:
  nsTimingFunction mTimingFunction;
  float mDuration;
  float mDelay;
  nsString mName; // empty string for 'none'
  uint8_t mDirection;
  uint8_t mFillMode;
  uint8_t mPlayState;
  float mIterationCount; // NS_IEEEPositiveInfinity() means infinite
};

struct nsStyleDisplay {
  nsStyleDisplay();
  nsStyleDisplay(const nsStyleDisplay& aOther);
  ~nsStyleDisplay() {
    MOZ_COUNT_DTOR(nsStyleDisplay);
  }

  void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
    return aContext->AllocateFromShell(sz);
  }
  void Destroy(nsPresContext* aContext) {
    this->~nsStyleDisplay();
    aContext->FreeToShell(sizeof(nsStyleDisplay), this);
  }

  nsChangeHint CalcDifference(const nsStyleDisplay& aOther) const;
  static nsChangeHint MaxDifference() {
    // All the parts of FRAMECHANGE are present in CalcDifference.
    return nsChangeHint(NS_STYLE_HINT_FRAMECHANGE |
                        nsChangeHint_UpdateOpacityLayer |
                        nsChangeHint_UpdateTransformLayer |
                        nsChangeHint_UpdateOverflow |
                        nsChangeHint_AddOrRemoveTransform);
  }

  // We guarantee that if mBinding is non-null, so are mBinding->GetURI() and
  // mBinding->mOriginPrincipal.
  nsRefPtr<mozilla::css::URLValue> mBinding;    // [reset]
  nsRect  mClip;                // [reset] offsets from upper-left border edge
  float   mOpacity;             // [reset]
  uint8_t mDisplay;             // [reset] see nsStyleConsts.h NS_STYLE_DISPLAY_*
  uint8_t mOriginalDisplay;     // [reset] saved mDisplay for position:absolute/fixed
                                //         and float:left/right; otherwise equal
                                //         to mDisplay
  uint8_t mAppearance;          // [reset]
  uint8_t mPosition;            // [reset] see nsStyleConsts.h
  uint8_t mFloats;              // [reset] see nsStyleConsts.h NS_STYLE_FLOAT_*
  uint8_t mOriginalFloats;      // [reset] saved mFloats for position:absolute/fixed;
                                //         otherwise equal to mFloats
  uint8_t mBreakType;           // [reset] see nsStyleConsts.h NS_STYLE_CLEAR_*
  uint8_t mBreakInside;         // [reset] NS_STYLE_PAGE_BREAK_AUTO/AVOID
  bool mBreakBefore;    // [reset]
  bool mBreakAfter;     // [reset]
  uint8_t mOverflowX;           // [reset] see nsStyleConsts.h
  uint8_t mOverflowY;           // [reset] see nsStyleConsts.h
  uint8_t mResize;              // [reset] see nsStyleConsts.h
  uint8_t mClipFlags;           // [reset] see nsStyleConsts.h
  uint8_t mOrient;              // [reset] see nsStyleConsts.h

  // mSpecifiedTransform is the list of transform functions as
  // specified, or null to indicate there is no transform.  (inherit or
  // initial are replaced by an actual list of transform functions, or
  // null, as appropriate.) (owned by the style rule)
  uint8_t mBackfaceVisibility;
  uint8_t mTransformStyle;
  const nsCSSValueList *mSpecifiedTransform; // [reset]
  nsStyleCoord mTransformOrigin[3]; // [reset] percent, coord, calc, 3rd param is coord, calc only
  nsStyleCoord mChildPerspective; // [reset] coord
  nsStyleCoord mPerspectiveOrigin[2]; // [reset] percent, coord, calc

  nsAutoTArray<nsTransition, 1> mTransitions; // [reset]
  // The number of elements in mTransitions that are not from repeating
  // a list due to another property being longer.
  uint32_t mTransitionTimingFunctionCount,
           mTransitionDurationCount,
           mTransitionDelayCount,
           mTransitionPropertyCount;

  nsAutoTArray<nsAnimation, 1> mAnimations; // [reset]
  // The number of elements in mAnimations that are not from repeating
  // a list due to another property being longer.
  uint32_t mAnimationTimingFunctionCount,
           mAnimationDurationCount,
           mAnimationDelayCount,
           mAnimationNameCount,
           mAnimationDirectionCount,
           mAnimationFillModeCount,
           mAnimationPlayStateCount,
           mAnimationIterationCountCount;

  bool IsBlockInsideStyle() const {
    return NS_STYLE_DISPLAY_BLOCK == mDisplay ||
           NS_STYLE_DISPLAY_LIST_ITEM == mDisplay ||
           NS_STYLE_DISPLAY_INLINE_BLOCK == mDisplay;
    // Should TABLE_CELL and TABLE_CAPTION go here?  They have
    // block frames nested inside of them.
    // (But please audit all callers before changing.)
  }

  bool IsBlockOutsideStyle() const {
    return NS_STYLE_DISPLAY_BLOCK == mDisplay ||
           NS_STYLE_DISPLAY_FLEX == mDisplay ||
           NS_STYLE_DISPLAY_LIST_ITEM == mDisplay ||
           NS_STYLE_DISPLAY_TABLE == mDisplay;
  }

  static bool IsDisplayTypeInlineOutside(uint8_t aDisplay) {
    return NS_STYLE_DISPLAY_INLINE == aDisplay ||
           NS_STYLE_DISPLAY_INLINE_BLOCK == aDisplay ||
           NS_STYLE_DISPLAY_INLINE_TABLE == aDisplay ||
           NS_STYLE_DISPLAY_INLINE_BOX == aDisplay ||
           NS_STYLE_DISPLAY_INLINE_FLEX == aDisplay ||
           NS_STYLE_DISPLAY_INLINE_GRID == aDisplay ||
           NS_STYLE_DISPLAY_INLINE_STACK == aDisplay;
  }

  bool IsInlineOutsideStyle() const {
    return IsDisplayTypeInlineOutside(mDisplay);
  }

  bool IsOriginalDisplayInlineOutsideStyle() const {
    return IsDisplayTypeInlineOutside(mOriginalDisplay);
  }

  bool IsFloatingStyle() const {
    return NS_STYLE_FLOAT_NONE != mFloats;
  }

  bool IsAbsolutelyPositionedStyle() const {
    return NS_STYLE_POSITION_ABSOLUTE == mPosition ||
           NS_STYLE_POSITION_FIXED == mPosition;
  }

  bool IsRelativelyPositionedStyle() const {
    return mPosition == NS_STYLE_POSITION_RELATIVE;
  }

  bool IsScrollableOverflow() const {
    // mOverflowX and mOverflowY always match when one of them is
    // NS_STYLE_OVERFLOW_VISIBLE or NS_STYLE_OVERFLOW_CLIP.
    return mOverflowX != NS_STYLE_OVERFLOW_VISIBLE &&
           mOverflowX != NS_STYLE_OVERFLOW_CLIP;
  }

  /* Returns whether the element has the -moz-transform property
   * or a related property. */
  bool HasTransformStyle() const {
    return mSpecifiedTransform != nullptr || 
           mTransformStyle == NS_STYLE_TRANSFORM_STYLE_PRESERVE_3D ||
           mBackfaceVisibility == NS_STYLE_BACKFACE_VISIBILITY_HIDDEN;
  }

  // These are defined in nsStyleStructInlines.h.

  // The aContextFrame argument on each of these is the frame this
  // style struct is for.  If the frame is for SVG text, the return
  // value will be massaged to be something that makes sense for
  // SVG text.
  inline bool IsBlockInside(const nsIFrame* aContextFrame) const;
  inline bool IsBlockOutside(const nsIFrame* aContextFrame) const;
  inline bool IsInlineOutside(const nsIFrame* aContextFrame) const;
  inline bool IsOriginalDisplayInlineOutside(const nsIFrame* aContextFrame) const;
  inline uint8_t GetDisplay(const nsIFrame* aContextFrame) const;
  inline bool IsFloating(const nsIFrame* aContextFrame) const;
  inline bool IsPositioned(const nsIFrame* aContextFrame) const;
  inline bool IsRelativelyPositioned(const nsIFrame* aContextFrame) const;
  inline bool IsAbsolutelyPositioned(const nsIFrame* aContextFrame) const;

  /* Returns whether the element has the -moz-transform property
   * or a related property, and supports CSS transforms. */
  inline bool HasTransform(const nsIFrame* aContextFrame) const;
};

struct nsStyleTable {
  nsStyleTable(void);
  nsStyleTable(const nsStyleTable& aOther);
  ~nsStyleTable(void);

  void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
    return aContext->AllocateFromShell(sz);
  }
  void Destroy(nsPresContext* aContext) {
    this->~nsStyleTable();
    aContext->FreeToShell(sizeof(nsStyleTable), this);
  }

  nsChangeHint CalcDifference(const nsStyleTable& aOther) const;
  static nsChangeHint MaxDifference() {
    return NS_STYLE_HINT_FRAMECHANGE;
  }

  uint8_t       mLayoutStrategy;// [reset] see nsStyleConsts.h NS_STYLE_TABLE_LAYOUT_*
  uint8_t       mFrame;         // [reset] see nsStyleConsts.h NS_STYLE_TABLE_FRAME_*
  uint8_t       mRules;         // [reset] see nsStyleConsts.h NS_STYLE_TABLE_RULES_*
  int32_t       mSpan;          // [reset] the number of columns spanned by a colgroup or col
};

struct nsStyleTableBorder {
  nsStyleTableBorder(nsPresContext* aContext);
  nsStyleTableBorder(const nsStyleTableBorder& aOther);
  ~nsStyleTableBorder(void);

  void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
    return aContext->AllocateFromShell(sz);
  }
  void Destroy(nsPresContext* aContext) {
    this->~nsStyleTableBorder();
    aContext->FreeToShell(sizeof(nsStyleTableBorder), this);
  }

  nsChangeHint CalcDifference(const nsStyleTableBorder& aOther) const;
  static nsChangeHint MaxDifference() {
    return NS_STYLE_HINT_FRAMECHANGE;
  }

  nscoord       mBorderSpacingX;// [inherited]
  nscoord       mBorderSpacingY;// [inherited]
  uint8_t       mBorderCollapse;// [inherited]
  uint8_t       mCaptionSide;   // [inherited]
  uint8_t       mEmptyCells;    // [inherited]
};

enum nsStyleContentType {
  eStyleContentType_String        = 1,
  eStyleContentType_Image         = 10,
  eStyleContentType_Attr          = 20,
  eStyleContentType_Counter       = 30,
  eStyleContentType_Counters      = 31,
  eStyleContentType_OpenQuote     = 40,
  eStyleContentType_CloseQuote    = 41,
  eStyleContentType_NoOpenQuote   = 42,
  eStyleContentType_NoCloseQuote  = 43,
  eStyleContentType_AltContent    = 50
};

struct nsStyleContentData {
  nsStyleContentType  mType;
  union {
    PRUnichar *mString;
    imgRequestProxy *mImage;
    nsCSSValue::Array* mCounters;
  } mContent;
#ifdef DEBUG
  bool mImageTracked;
#endif

  nsStyleContentData()
    : mType(nsStyleContentType(0))
#ifdef DEBUG
    , mImageTracked(false)
#endif
  { mContent.mString = nullptr; }

  ~nsStyleContentData();
  nsStyleContentData& operator=(const nsStyleContentData& aOther);
  bool operator==(const nsStyleContentData& aOther) const;

  bool operator!=(const nsStyleContentData& aOther) const {
    return !(*this == aOther);
  }

  void TrackImage(nsPresContext* aContext);
  void UntrackImage(nsPresContext* aContext);

  void SetImage(imgRequestProxy* aRequest)
  {
    NS_ABORT_IF_FALSE(!mImageTracked,
                      "Setting a new image without untracking the old one!");
    NS_ABORT_IF_FALSE(mType == eStyleContentType_Image, "Wrong type!");
    NS_IF_ADDREF(mContent.mImage = aRequest);
  }
private:
  nsStyleContentData(const nsStyleContentData&); // not to be implemented
};

struct nsStyleCounterData {
  nsString  mCounter;
  int32_t   mValue;
};


#define DELETE_ARRAY_IF(array)  if (array) { delete[] array; array = nullptr; }

struct nsStyleQuotes {
  nsStyleQuotes();
  nsStyleQuotes(const nsStyleQuotes& aQuotes);
  ~nsStyleQuotes();

  void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
    return aContext->AllocateFromShell(sz);
  }
  void Destroy(nsPresContext* aContext) {
    this->~nsStyleQuotes();
    aContext->FreeToShell(sizeof(nsStyleQuotes), this);
  }

  void SetInitial();
  void CopyFrom(const nsStyleQuotes& aSource);

  nsChangeHint CalcDifference(const nsStyleQuotes& aOther) const;
  static nsChangeHint MaxDifference() {
    return NS_STYLE_HINT_FRAMECHANGE;
  }

  uint32_t  QuotesCount(void) const { return mQuotesCount; } // [inherited]

  const nsString* OpenQuoteAt(uint32_t aIndex) const
  {
    NS_ASSERTION(aIndex < mQuotesCount, "out of range");
    return mQuotes + (aIndex * 2);
  }
  const nsString* CloseQuoteAt(uint32_t aIndex) const
  {
    NS_ASSERTION(aIndex < mQuotesCount, "out of range");
    return mQuotes + (aIndex * 2 + 1);
  }
  nsresult  GetQuotesAt(uint32_t aIndex, nsString& aOpen, nsString& aClose) const {
    if (aIndex < mQuotesCount) {
      aIndex *= 2;
      aOpen = mQuotes[aIndex];
      aClose = mQuotes[++aIndex];
      return NS_OK;
    }
    return NS_ERROR_ILLEGAL_VALUE;
  }

  nsresult  AllocateQuotes(uint32_t aCount) {
    if (aCount != mQuotesCount) {
      DELETE_ARRAY_IF(mQuotes);
      if (aCount) {
        mQuotes = new nsString[aCount * 2];
        if (! mQuotes) {
          mQuotesCount = 0;
          return NS_ERROR_OUT_OF_MEMORY;
        }
      }
      mQuotesCount = aCount;
    }
    return NS_OK;
  }

  nsresult  SetQuotesAt(uint32_t aIndex, const nsString& aOpen, const nsString& aClose) {
    if (aIndex < mQuotesCount) {
      aIndex *= 2;
      mQuotes[aIndex] = aOpen;
      mQuotes[++aIndex] = aClose;
      return NS_OK;
    }
    return NS_ERROR_ILLEGAL_VALUE;
  }

protected:
  uint32_t            mQuotesCount;
  nsString*           mQuotes;
};

struct nsStyleContent {
  nsStyleContent(void);
  nsStyleContent(const nsStyleContent& aContent);
  ~nsStyleContent(void);

  void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
    return aContext->AllocateFromShell(sz);
  }
  void Destroy(nsPresContext* aContext);

  nsChangeHint CalcDifference(const nsStyleContent& aOther) const;
  static nsChangeHint MaxDifference() {
    return NS_STYLE_HINT_FRAMECHANGE;
  }

  uint32_t  ContentCount(void) const  { return mContentCount; } // [reset]

  const nsStyleContentData& ContentAt(uint32_t aIndex) const {
    NS_ASSERTION(aIndex < mContentCount, "out of range");
    return mContents[aIndex];
  }

  nsStyleContentData& ContentAt(uint32_t aIndex) {
    NS_ASSERTION(aIndex < mContentCount, "out of range");
    return mContents[aIndex];
  }

  nsresult AllocateContents(uint32_t aCount);

  uint32_t  CounterIncrementCount(void) const { return mIncrementCount; }  // [reset]
  const nsStyleCounterData* GetCounterIncrementAt(uint32_t aIndex) const {
    NS_ASSERTION(aIndex < mIncrementCount, "out of range");
    return &mIncrements[aIndex];
  }

  nsresult  AllocateCounterIncrements(uint32_t aCount) {
    if (aCount != mIncrementCount) {
      DELETE_ARRAY_IF(mIncrements);
      if (aCount) {
        mIncrements = new nsStyleCounterData[aCount];
        if (! mIncrements) {
          mIncrementCount = 0;
          return NS_ERROR_OUT_OF_MEMORY;
        }
      }
      mIncrementCount = aCount;
    }
    return NS_OK;
  }

  nsresult  SetCounterIncrementAt(uint32_t aIndex, const nsString& aCounter, int32_t aIncrement) {
    if (aIndex < mIncrementCount) {
      mIncrements[aIndex].mCounter = aCounter;
      mIncrements[aIndex].mValue = aIncrement;
      return NS_OK;
    }
    return NS_ERROR_ILLEGAL_VALUE;
  }

  uint32_t  CounterResetCount(void) const { return mResetCount; }  // [reset]
  const nsStyleCounterData* GetCounterResetAt(uint32_t aIndex) const {
    NS_ASSERTION(aIndex < mResetCount, "out of range");
    return &mResets[aIndex];
  }

  nsresult  AllocateCounterResets(uint32_t aCount) {
    if (aCount != mResetCount) {
      DELETE_ARRAY_IF(mResets);
      if (aCount) {
        mResets = new nsStyleCounterData[aCount];
        if (! mResets) {
          mResetCount = 0;
          return NS_ERROR_OUT_OF_MEMORY;
        }
      }
      mResetCount = aCount;
    }
    return NS_OK;
  }

  nsresult  SetCounterResetAt(uint32_t aIndex, const nsString& aCounter, int32_t aValue) {
    if (aIndex < mResetCount) {
      mResets[aIndex].mCounter = aCounter;
      mResets[aIndex].mValue = aValue;
      return NS_OK;
    }
    return NS_ERROR_ILLEGAL_VALUE;
  }

  nsStyleCoord  mMarkerOffset;  // [reset] coord, auto

protected:
  nsStyleContentData* mContents;
  nsStyleCounterData* mIncrements;
  nsStyleCounterData* mResets;

  uint32_t            mContentCount;
  uint32_t            mIncrementCount;
  uint32_t            mResetCount;
};

struct nsStyleUIReset {
  nsStyleUIReset(void);
  nsStyleUIReset(const nsStyleUIReset& aOther);
  ~nsStyleUIReset(void);

  void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
    return aContext->AllocateFromShell(sz);
  }
  void Destroy(nsPresContext* aContext) {
    this->~nsStyleUIReset();
    aContext->FreeToShell(sizeof(nsStyleUIReset), this);
  }

  nsChangeHint CalcDifference(const nsStyleUIReset& aOther) const;
  static nsChangeHint MaxDifference() {
    return NS_STYLE_HINT_FRAMECHANGE;
  }

  uint8_t   mUserSelect;      // [reset] (selection-style)
  uint8_t   mForceBrokenImageIcon; // [reset]  (0 if not forcing, otherwise forcing)
  uint8_t   mIMEMode;         // [reset]
  uint8_t   mWindowShadow;    // [reset]
};

struct nsCursorImage {
  bool mHaveHotspot;
  float mHotspotX, mHotspotY;

  nsCursorImage();
  nsCursorImage(const nsCursorImage& aOther);
  ~nsCursorImage();

  nsCursorImage& operator=(const nsCursorImage& aOther);
  /*
   * We hide mImage and force access through the getter and setter so that we
   * can lock the images we use. Cursor images are likely to be small, so we
   * don't care about discarding them. See bug 512260.
   * */
  void SetImage(imgIRequest *aImage) {
    if (mImage)
      mImage->UnlockImage();
    mImage = aImage;
    if (mImage)
      mImage->LockImage();
  }
  imgIRequest* GetImage() const {
    return mImage;
  }

private:
  nsCOMPtr<imgIRequest> mImage;
};

struct nsStyleUserInterface {
  nsStyleUserInterface(void);
  nsStyleUserInterface(const nsStyleUserInterface& aOther);
  ~nsStyleUserInterface(void);

  void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
    return aContext->AllocateFromShell(sz);
  }
  void Destroy(nsPresContext* aContext) {
    this->~nsStyleUserInterface();
    aContext->FreeToShell(sizeof(nsStyleUserInterface), this);
  }

  nsChangeHint CalcDifference(const nsStyleUserInterface& aOther) const;
  static nsChangeHint MaxDifference() {
    return nsChangeHint(nsChangeHint_UpdateCursor | NS_STYLE_HINT_FRAMECHANGE);
  }

  uint8_t   mUserInput;       // [inherited]
  uint8_t   mUserModify;      // [inherited] (modify-content)
  uint8_t   mUserFocus;       // [inherited] (auto-select)

  uint8_t   mCursor;          // [inherited] See nsStyleConsts.h

  uint32_t mCursorArrayLength;
  nsCursorImage *mCursorArray;// [inherited] The specified URL values
                              //   and coordinates.  Takes precedence over
                              //   mCursor.  Zero-length array is represented
                              //   by null pointer.

  // Does not free mCursorArray; the caller is responsible for calling
  // |delete [] mCursorArray| first if it is needed.
  void CopyCursorArrayFrom(const nsStyleUserInterface& aSource);
};

struct nsStyleXUL {
  nsStyleXUL();
  nsStyleXUL(const nsStyleXUL& aSource);
  ~nsStyleXUL();

  void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
    return aContext->AllocateFromShell(sz);
  }
  void Destroy(nsPresContext* aContext) {
    this->~nsStyleXUL();
    aContext->FreeToShell(sizeof(nsStyleXUL), this);
  }

  nsChangeHint CalcDifference(const nsStyleXUL& aOther) const;
  static nsChangeHint MaxDifference() {
    return NS_STYLE_HINT_FRAMECHANGE;
  }

  float         mBoxFlex;               // [reset] see nsStyleConsts.h
  uint32_t      mBoxOrdinal;            // [reset] see nsStyleConsts.h
  uint8_t       mBoxAlign;              // [reset] see nsStyleConsts.h
  uint8_t       mBoxDirection;          // [reset] see nsStyleConsts.h
  uint8_t       mBoxOrient;             // [reset] see nsStyleConsts.h
  uint8_t       mBoxPack;               // [reset] see nsStyleConsts.h
  bool          mStretchStack;          // [reset] see nsStyleConsts.h
};

struct nsStyleColumn {
  nsStyleColumn(nsPresContext* aPresContext);
  nsStyleColumn(const nsStyleColumn& aSource);
  ~nsStyleColumn();

  void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
    return aContext->AllocateFromShell(sz);
  }
  void Destroy(nsPresContext* aContext) {
    this->~nsStyleColumn();
    aContext->FreeToShell(sizeof(nsStyleColumn), this);
  }

  nsChangeHint CalcDifference(const nsStyleColumn& aOther) const;
  static nsChangeHint MaxDifference() {
    return NS_STYLE_HINT_FRAMECHANGE;
  }

  /**
   * This is the maximum number of columns we can process. It's used in both
   * nsColumnSetFrame and nsRuleNode.
   */
  static const uint32_t kMaxColumnCount;

  uint32_t     mColumnCount; // [reset] see nsStyleConsts.h
  nsStyleCoord mColumnWidth; // [reset] coord, auto
  nsStyleCoord mColumnGap;   // [reset] coord, normal

  nscolor      mColumnRuleColor;  // [reset]
  uint8_t      mColumnRuleStyle;  // [reset]
  uint8_t      mColumnFill;  // [reset] see nsStyleConsts.h

  // See https://bugzilla.mozilla.org/show_bug.cgi?id=271586#c43 for why
  // this is hard to replace with 'currentColor'.
  bool mColumnRuleColorIsForeground;

  void SetColumnRuleWidth(nscoord aWidth) {
    mColumnRuleWidth = NS_ROUND_BORDER_TO_PIXELS(aWidth, mTwipsPerPixel);
  }

  nscoord GetComputedColumnRuleWidth() const {
    return (IsVisibleBorderStyle(mColumnRuleStyle) ? mColumnRuleWidth : 0);
  }

protected:
  nscoord mColumnRuleWidth;  // [reset] coord
  nscoord mTwipsPerPixel;
};

enum nsStyleSVGPaintType {
  eStyleSVGPaintType_None = 1,
  eStyleSVGPaintType_Color,
  eStyleSVGPaintType_Server,
  eStyleSVGPaintType_ObjectFill,
  eStyleSVGPaintType_ObjectStroke
};

enum nsStyleSVGOpacitySource {
  eStyleSVGOpacitySource_Normal,
  eStyleSVGOpacitySource_ObjectFillOpacity,
  eStyleSVGOpacitySource_ObjectStrokeOpacity
};

struct nsStyleSVGPaint
{
  union {
    nscolor mColor;
    nsIURI *mPaintServer;
  } mPaint;
  nsStyleSVGPaintType mType;
  nscolor mFallbackColor;

  nsStyleSVGPaint() : mType(nsStyleSVGPaintType(0)) { mPaint.mPaintServer = nullptr; }
  ~nsStyleSVGPaint();
  void SetType(nsStyleSVGPaintType aType);
  nsStyleSVGPaint& operator=(const nsStyleSVGPaint& aOther);
  bool operator==(const nsStyleSVGPaint& aOther) const;

  bool operator!=(const nsStyleSVGPaint& aOther) const {
    return !(*this == aOther);
  }
};

struct nsStyleSVG {
  nsStyleSVG();
  nsStyleSVG(const nsStyleSVG& aSource);
  ~nsStyleSVG();

  void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
    return aContext->AllocateFromShell(sz);
  }
  void Destroy(nsPresContext* aContext) {
    this->~nsStyleSVG();
    aContext->FreeToShell(sizeof(nsStyleSVG), this);
  }

  nsChangeHint CalcDifference(const nsStyleSVG& aOther) const;
  static nsChangeHint MaxDifference() {
    return NS_CombineHint(NS_CombineHint(nsChangeHint_UpdateEffects,
             NS_CombineHint(nsChangeHint_NeedReflow, nsChangeHint_NeedDirtyReflow)), // XXX remove nsChangeHint_NeedDirtyReflow: bug 876085
                                         nsChangeHint_RepaintFrame);
  }

  nsStyleSVGPaint  mFill;             // [inherited]
  nsStyleSVGPaint  mStroke;           // [inherited]
  nsCOMPtr<nsIURI> mMarkerEnd;        // [inherited]
  nsCOMPtr<nsIURI> mMarkerMid;        // [inherited]
  nsCOMPtr<nsIURI> mMarkerStart;      // [inherited]
  nsStyleCoord    *mStrokeDasharray;  // [inherited] coord, percent, factor

  nsStyleCoord     mStrokeDashoffset; // [inherited] coord, percent, factor
  nsStyleCoord     mStrokeWidth;      // [inherited] coord, percent, factor

  float            mFillOpacity;      // [inherited]
  float            mStrokeMiterlimit; // [inherited]
  float            mStrokeOpacity;    // [inherited]

  uint32_t         mStrokeDasharrayLength;
  uint8_t          mClipRule;         // [inherited]
  uint8_t          mColorInterpolation; // [inherited] see nsStyleConsts.h
  uint8_t          mColorInterpolationFilters; // [inherited] see nsStyleConsts.h
  uint8_t          mFillRule;         // [inherited] see nsStyleConsts.h
  uint8_t          mImageRendering;   // [inherited] see nsStyleConsts.h
  uint8_t          mPaintOrder;       // [inherited] see nsStyleConsts.h
  uint8_t          mShapeRendering;   // [inherited] see nsStyleConsts.h
  uint8_t          mStrokeLinecap;    // [inherited] see nsStyleConsts.h
  uint8_t          mStrokeLinejoin;   // [inherited] see nsStyleConsts.h
  uint8_t          mTextAnchor;       // [inherited] see nsStyleConsts.h
  uint8_t          mTextRendering;    // [inherited] see nsStyleConsts.h

  // In SVG glyphs, whether we inherit fill or stroke opacity from the outer
  // text object.
  // Use 3 bits to avoid signedness problems in MSVC.
  nsStyleSVGOpacitySource mFillOpacitySource    : 3;
  nsStyleSVGOpacitySource mStrokeOpacitySource  : 3;

  // SVG glyph outer object inheritance for other properties
  bool mStrokeDasharrayFromObject   : 1;
  bool mStrokeDashoffsetFromObject  : 1;
  bool mStrokeWidthFromObject       : 1;
};

struct nsStyleSVGReset {
  nsStyleSVGReset();
  nsStyleSVGReset(const nsStyleSVGReset& aSource);
  ~nsStyleSVGReset();

  void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
    return aContext->AllocateFromShell(sz);
  }
  void Destroy(nsPresContext* aContext) {
    this->~nsStyleSVGReset();
    aContext->FreeToShell(sizeof(nsStyleSVGReset), this);
  }

  nsChangeHint CalcDifference(const nsStyleSVGReset& aOther) const;
  static nsChangeHint MaxDifference() {
    return NS_CombineHint(nsChangeHint_UpdateEffects, NS_STYLE_HINT_REFLOW);
  }

  nsCOMPtr<nsIURI> mClipPath;         // [reset]
  nsCOMPtr<nsIURI> mFilter;           // [reset]
  nsCOMPtr<nsIURI> mMask;             // [reset]
  nscolor          mStopColor;        // [reset]
  nscolor          mFloodColor;       // [reset]
  nscolor          mLightingColor;    // [reset]

  float            mStopOpacity;      // [reset]
  float            mFloodOpacity;     // [reset]

  uint8_t          mDominantBaseline; // [reset] see nsStyleConsts.h
  uint8_t          mVectorEffect;     // [reset] see nsStyleConsts.h
  uint8_t          mMaskType;         // [reset] see nsStyleConsts.h
};

#endif /* nsStyleStruct_h___ */