// Assigns to aValue iff it returns true.
internal bool ParseVariant(ref nsCSSValue aValue,
int32_t aVariantMask,
int32_t[] aKeywordTable)
{
Debug.Assert(!(mHashlessColorQuirk && ((aVariantMask & VARIANT_COLOR) != 0)) ||
!((aVariantMask & VARIANT_NUMBER) != 0),
"can't distinguish colors from numbers");
Debug.Assert(!(mHashlessColorQuirk && ((aVariantMask & VARIANT_COLOR) != 0)) ||
!(mUnitlessLengthQuirk && ((aVariantMask & VARIANT_LENGTH) != 0)),
"can't distinguish colors from lengths");
Debug.Assert(!(mUnitlessLengthQuirk && ((aVariantMask & VARIANT_LENGTH) != 0)) ||
!((aVariantMask & VARIANT_NUMBER) != 0),
"can't distinguish lengths from numbers");
Debug.Assert(!((aVariantMask & VARIANT_IDENTIFIER) != 0) ||
!((aVariantMask & VARIANT_IDENTIFIER_NO_INHERIT) != 0),
"must not set both VARIANT_IDENTIFIER and VARIANT_IDENTIFIER_NO_INHERIT");
if (!GetToken(true)) {
return false;
}
nsCSSToken tk = mToken;
if (((aVariantMask & (VARIANT_AHK | VARIANT_NORMAL | VARIANT_NONE | VARIANT_ALL)) != 0) &&
(nsCSSTokenType.Ident == tk.mType)) {
nsCSSKeyword keyword = nsCSSKeywords.LookupKeyword(tk.mIdentStr);
if (nsCSSKeyword.UNKNOWN < keyword) { // known keyword
if ((aVariantMask & VARIANT_AUTO) != 0) {
if (nsCSSKeyword.auto == keyword) {
aValue.SetAutoValue();
return true;
}
}
if ((aVariantMask & VARIANT_INHERIT) != 0) {
// XXX Should we check IsParsingCompoundProperty, or do all
// callers handle it? (Not all callers set it, though, since
// they want the quirks that are disabled by setting it.)
if (nsCSSKeyword.inherit == keyword) {
aValue.SetInheritValue();
return true;
}
else if (nsCSSKeyword._moz_initial == keyword ||
nsCSSKeyword.initial == keyword) { // anything that can inherit can also take an initial val.
aValue.SetInitialValue();
return true;
}
}
if ((aVariantMask & VARIANT_NONE) != 0) {
if (nsCSSKeyword.none == keyword) {
aValue.SetNoneValue();
return true;
}
}
if ((aVariantMask & VARIANT_ALL) != 0) {
if (nsCSSKeyword.all == keyword) {
aValue.SetAllValue();
return true;
}
}
if ((aVariantMask & VARIANT_NORMAL) != 0) {
if (nsCSSKeyword.normal == keyword) {
aValue.SetNormalValue();
return true;
}
}
if ((aVariantMask & VARIANT_SYSFONT) != 0) {
if (nsCSSKeyword._moz_use_system_font == keyword &&
!IsParsingCompoundProperty()) {
aValue.SetSystemFontValue();
return true;
}
}
if ((aVariantMask & VARIANT_KEYWORD) != 0) {
int32_t value = 0;
if (nsCSSProps.FindKeyword(keyword, aKeywordTable, ref value)) {
aValue.SetIntValue(value, nsCSSUnit.Enumerated);
return true;
}
}
}
}
// Check VARIANT_NUMBER and VARIANT_INTEGER before VARIANT_LENGTH or
// VARIANT_ZERO_ANGLE.
if (((aVariantMask & VARIANT_NUMBER) != 0) &&
(nsCSSTokenType.Number == tk.mType)) {
aValue.SetFloatValue(tk.mNumber, nsCSSUnit.Number);
return true;
}
if (((aVariantMask & VARIANT_INTEGER) != 0) &&
(nsCSSTokenType.Number == tk.mType) && tk.mIntegerValid) {
aValue.SetIntValue(tk.mInteger, nsCSSUnit.Integer);
return true;
}
if (((aVariantMask & (VARIANT_LENGTH | VARIANT_ANGLE |
VARIANT_FREQUENCY | VARIANT_TIME)) != 0 &&
nsCSSTokenType.Dimension == tk.mType) ||
((aVariantMask & (VARIANT_LENGTH | VARIANT_ZERO_ANGLE)) != 0 &&
nsCSSTokenType.Number == tk.mType &&
tk.mNumber == 0.0f)) {
if (((aVariantMask & VARIANT_POSITIVE_DIMENSION) != 0 &&
tk.mNumber <= 0.0) ||
((aVariantMask & VARIANT_NONNEGATIVE_DIMENSION) != 0 &&
tk.mNumber < 0.0)) {
UngetToken();
return false;
}
if (TranslateDimension(ref aValue, aVariantMask, tk.mNumber, tk.mIdentStr)) {
return true;
}
// Put the token back; we didn't parse it, so we shouldn't consume it
UngetToken();
return false;
}
if (((aVariantMask & VARIANT_PERCENT) != 0) &&
(nsCSSTokenType.Percentage == tk.mType)) {
aValue.SetPercentValue(tk.mNumber);
return true;
}
if (mUnitlessLengthQuirk) { // NONSTANDARD: Nav interprets unitless numbers as px
if (((aVariantMask & VARIANT_LENGTH) != 0) &&
(nsCSSTokenType.Number == tk.mType)) {
aValue.SetFloatValue(tk.mNumber, nsCSSUnit.Pixel);
return true;
}
}
if (IsSVGMode() && !IsParsingCompoundProperty()) {
// STANDARD: SVG Spec states that lengths and coordinates can be unitless
// in which case they default to user-units (1 px = 1 user unit)
if (((aVariantMask & VARIANT_LENGTH) != 0) &&
(nsCSSTokenType.Number == tk.mType)) {
aValue.SetFloatValue(tk.mNumber, nsCSSUnit.Pixel);
return true;
}
}
if (((aVariantMask & VARIANT_URL) != 0) &&
nsCSSTokenType.URL == tk.mType) {
SetValueToURL(ref aValue, tk.mIdentStr);
return true;
}
if ((aVariantMask & VARIANT_GRADIENT) != 0 &&
nsCSSTokenType.Function == tk.mType) {
// a generated gradient
string tmp = tk.mIdentStr;
bool isLegacy = false;
if (StringBeginsWith(tmp, "-moz-")) {
tmp = tmp.Substring(5);
isLegacy = true;
}
bool isRepeating = false;
if (StringBeginsWith(tmp, "repeating-")) {
tmp = tmp.Substring(10);
isRepeating = true;
}
if (tmp.LowerCaseEqualsLiteral("linear-gradient")) {
return ParseLinearGradient(ref aValue, isRepeating, isLegacy);
}
if (tmp.LowerCaseEqualsLiteral("radial-gradient")) {
return ParseRadialGradient(ref aValue, isRepeating, isLegacy);
}
}
if ((aVariantMask & VARIANT_IMAGE_RECT) != 0 &&
nsCSSTokenType.Function == tk.mType &&
tk.mIdentStr.LowerCaseEqualsLiteral("-moz-image-rect")) {
return ParseImageRect(ref aValue);
}
if ((aVariantMask & VARIANT_ELEMENT) != 0 &&
nsCSSTokenType.Function == tk.mType &&
tk.mIdentStr.LowerCaseEqualsLiteral("-moz-element")) {
return ParseElement(ref aValue);
}
if ((aVariantMask & VARIANT_COLOR) != 0) {
if (mHashlessColorQuirk || // NONSTANDARD: Nav interprets 'xxyyzz' values even without '#' prefix
(nsCSSTokenType.ID == tk.mType) ||
(nsCSSTokenType.Hash == tk.mType) ||
(nsCSSTokenType.Ident == tk.mType) ||
((nsCSSTokenType.Function == tk.mType) &&
(tk.mIdentStr.LowerCaseEqualsLiteral("rgb") ||
tk.mIdentStr.LowerCaseEqualsLiteral("hsl") ||
tk.mIdentStr.LowerCaseEqualsLiteral("-moz-rgba") ||
tk.mIdentStr.LowerCaseEqualsLiteral("-moz-hsla") ||
tk.mIdentStr.LowerCaseEqualsLiteral("rgba") ||
tk.mIdentStr.LowerCaseEqualsLiteral("hsla"))))
{
// Put token back so that parse color can get it
UngetToken();
if (ParseColor(ref aValue)) {
return true;
}
return false;
}
}
if (((aVariantMask & VARIANT_STRING) != 0) &&
(nsCSSTokenType.String == tk.mType)) {
string buffer;
buffer = tk.mIdentStr;
aValue.SetStringValue(buffer, nsCSSUnit.String);
return true;
}
if (((aVariantMask &
(VARIANT_IDENTIFIER | VARIANT_IDENTIFIER_NO_INHERIT)) != 0) &&
(nsCSSTokenType.Ident == tk.mType) &&
((aVariantMask & VARIANT_IDENTIFIER) != 0 ||
!(tk.mIdentStr.LowerCaseEqualsLiteral("inherit") ||
tk.mIdentStr.LowerCaseEqualsLiteral("initial")))) {
aValue.SetStringValue(tk.mIdentStr, nsCSSUnit.Ident);
return true;
}
if (((aVariantMask & VARIANT_COUNTER) != 0) &&
(nsCSSTokenType.Function == tk.mType) &&
(tk.mIdentStr.LowerCaseEqualsLiteral("counter") ||
tk.mIdentStr.LowerCaseEqualsLiteral("counters"))) {
return ParseCounter(ref aValue);
}
if (((aVariantMask & VARIANT_ATTR) != 0) &&
(nsCSSTokenType.Function == tk.mType) &&
tk.mIdentStr.LowerCaseEqualsLiteral("attr")) {
if (!ParseAttr(ref aValue)) {
SkipUntil(')');
return false;
}
return true;
}
if (((aVariantMask & VARIANT_TIMING_FUNCTION) != 0) &&
(nsCSSTokenType.Function == tk.mType)) {
if (tk.mIdentStr.LowerCaseEqualsLiteral("cubic-bezier")) {
if (!ParseTransitionTimingFunctionValues(ref aValue)) {
SkipUntil(')');
return false;
}
return true;
}
if (tk.mIdentStr.LowerCaseEqualsLiteral("steps")) {
if (!ParseTransitionStepTimingFunctionValues(ref aValue)) {
SkipUntil(')');
return false;
}
return true;
}
}
if (((aVariantMask & VARIANT_CALC) != 0) &&
(nsCSSTokenType.Function == tk.mType) &&
(tk.mIdentStr.LowerCaseEqualsLiteral("calc") ||
tk.mIdentStr.LowerCaseEqualsLiteral("-moz-calc"))) {
// calc() currently allows only lengths and percents inside it.
return ParseCalc(ref aValue, aVariantMask & VARIANT_LP);
}
UngetToken();
return false;
}