// 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;
}
internal bool ParseAttr(ref nsCSSValue aValue)
{
if (!GetToken(true)) {
return false;
}
var attr = new StringBuilder();
if (nsCSSTokenType.Ident == mToken.mType) { // attr name or namespace
string holdIdent = mToken.mIdentStr;
if (ExpectSymbol('|', false)) { // namespace
int32_t nameSpaceID = GetNamespaceIdForPrefix(holdIdent);
if (nameSpaceID == nsNameSpace.Unknown) {
return false;
}
attr.AppendInt(nameSpaceID, 10);
attr.Append('|');
if (! GetToken(false)) {
{ if (!mSuppressErrors) mReporter.ReportUnexpected("PEAttributeNameEOF"); };
return false;
}
if (nsCSSTokenType.Ident == mToken.mType) {
attr.Append(mToken.mIdentStr);
}
else {
{ if (!mSuppressErrors) mReporter.ReportUnexpected("PEAttributeNameExpected", mToken); };
UngetToken();
return false;
}
}
else { // no namespace
attr.AssignLiteral(holdIdent);
}
}
else if (mToken.IsSymbol('*')) { // namespace wildcard
// Wildcard namespace makes no sense here and is not allowed
{ if (!mSuppressErrors) mReporter.ReportUnexpected("PEAttributeNameExpected", mToken); };
UngetToken();
return false;
}
else if (mToken.IsSymbol('|')) { // explicit NO namespace
if (! GetToken(false)) {
{ if (!mSuppressErrors) mReporter.ReportUnexpected("PEAttributeNameEOF"); };
return false;
}
if (nsCSSTokenType.Ident == mToken.mType) {
attr.Append(mToken.mIdentStr);
}
else {
{ if (!mSuppressErrors) mReporter.ReportUnexpected("PEAttributeNameExpected", mToken); };
UngetToken();
return false;
}
}
else {
{ if (!mSuppressErrors) mReporter.ReportUnexpected("PEAttributeNameOrNamespaceExpected", mToken); };
UngetToken();
return false;
}
if (!ExpectSymbol(')', true)) {
return false;
}
aValue.SetStringValue(attr, nsCSSUnit.Attr);
return true;
}
// src: ( uri-src | local-src ) (',' ( uri-src | local-src ) )*
// uri-src: uri [ 'format(' string ( ',' string )* ')' ]
// local-src: 'local(' ( string | ident ) ')'
internal bool ParseFontSrc(ref nsCSSValue aValue)
{
// could we maybe turn nsCSSValue[] into List<nsCSSValue>?
var values = new List<nsCSSValue>();
var cur = new nsCSSValue();
for (;;) {
if (!GetToken(true))
break;
if (mToken.mType == nsCSSTokenType.URL) {
SetValueToURL(ref cur, mToken.mIdentStr);
values.AppendElement(cur);
if (!ParseFontSrcFormat(values))
return false;
} else if (mToken.mType == nsCSSTokenType.Function &&
mToken.mIdentStr.LowerCaseEqualsLiteral("local")) {
// css3-fonts does not specify a formal grammar for local().
// The text permits both unquoted identifiers and quoted
// strings. We resolve this ambiguity in the spec by
// assuming that the appropriate production is a single
// <family-name>, possibly surrounded by whitespace.
var family = new StringBuilder();
bool single = false;
if (!ParseOneFamily(family, ref single)) {
SkipUntil(')');
return false;
}
if (!ExpectSymbol(')', true)) {
SkipUntil(')');
return false;
}
// the style parameters to the nsFont constructor are ignored,
// because it's only being used to call EnumerateFamilies
var font = new nsFont(family, 0, 0, 0, 0, 0, 0);
var dat = new ExtractFirstFamilyData();
font.EnumerateFamilies(ExtractFirstFamily, (object) dat);
if (!dat.mGood)
return false;
cur.SetStringValue(dat.mFamilyName, nsCSSUnit.LocalFont);
values.AppendElement(cur);
} else {
// We don't know what to do with this token; unget it and error out
UngetToken();
return false;
}
if (!ExpectSymbol(',', true))
break;
}
if (values.Length() == 0)
return false;
nsCSSValue[] srcVals
= new nsCSSValue[values.Length()];
uint32_t i = 0;
for (i = 0; i < values.Length(); i++)
srcVals[i] = values[i];
aValue.SetArrayValue(srcVals, nsCSSUnit.Array);
return true;
}
// font-descriptor: descriptor ':' value ';'
// caller has advanced mToken to point at the descriptor
internal bool ParseFontDescriptorValue(nsCSSFontDesc aDescID,
ref nsCSSValue aValue)
{
switch (aDescID) {
// These four are similar to the properties of the same name,
// possibly with more restrictions on the values they can take.
case nsCSSFontDesc.Family: {
if (!ParseFamily(ref aValue) ||
aValue.GetUnit() != nsCSSUnit.Families)
return false;
// the style parameters to the nsFont constructor are ignored,
// because it's only being used to call EnumerateFamilies
string valueStr = "";
aValue.GetStringValue(ref valueStr);
var font = new nsFont(valueStr, 0, 0, 0, 0, 0, 0);
var dat = new ExtractFirstFamilyData();
font.EnumerateFamilies(ExtractFirstFamily, (object) dat);
if (!dat.mGood)
return false;
aValue.SetStringValue(dat.mFamilyName, nsCSSUnit.String);
return true;
}
goto case nsCSSFontDesc.Style;
case nsCSSFontDesc.Style:
// property is VARIANT_HMK|VARIANT_SYSFONT
return ParseVariant(ref aValue, VARIANT_KEYWORD | VARIANT_NORMAL,
nsCSSProps.kFontStyleKTable);
case nsCSSFontDesc.Weight:
return (ParseFontWeight(ref aValue) &&
aValue.GetUnit() != nsCSSUnit.Inherit &&
aValue.GetUnit() != nsCSSUnit.Initial &&
(aValue.GetUnit() != nsCSSUnit.Enumerated ||
(aValue.GetIntValue() != nsStyle.FONT_WEIGHT_BOLDER &&
aValue.GetIntValue() != nsStyle.FONT_WEIGHT_LIGHTER)));
case nsCSSFontDesc.Stretch:
// property is VARIANT_HK|VARIANT_SYSFONT
return ParseVariant(ref aValue, VARIANT_KEYWORD,
nsCSSProps.kFontStretchKTable);
// These two are unique to @font-face and have their own special grammar.
goto case nsCSSFontDesc.Src;
case nsCSSFontDesc.Src:
return ParseFontSrc(ref aValue);
case nsCSSFontDesc.UnicodeRange:
return ParseFontRanges(ref aValue);
case nsCSSFontDesc.FontFeatureSettings:
return ParseFontFeatureSettings(ref aValue);
case nsCSSFontDesc.FontLanguageOverride:
return ParseVariant(ref aValue, VARIANT_NORMAL | VARIANT_STRING, null);
case nsCSSFontDesc.UNKNOWN:
case nsCSSFontDesc.COUNT:
Debug.Fail("bad nsCSSFontDesc code");
break;
}
// explicitly do NOT have a default case to let the compiler
// help find missing descriptors
return false;
}
internal bool ParseFamily(ref nsCSSValue aValue)
{
var family = new StringBuilder();
bool single = false;
// keywords only have meaning in the first position
if (!ParseOneFamily(family, ref single))
return false;
// check for keywords, but only when keywords appear by themselves
// i.e. not in compounds such as font-family: default blah;
if (single) {
nsCSSKeyword keyword = nsCSSKeywords.LookupKeyword(family);
if (keyword == nsCSSKeyword.inherit) {
aValue.SetInheritValue();
return true;
}
// 605231 - don't parse unquoted 'default' reserved keyword
if (keyword == nsCSSKeyword.@default) {
return false;
}
if (keyword == nsCSSKeyword._moz_initial || keyword == nsCSSKeyword.initial) {
aValue.SetInitialValue();
return true;
}
if (keyword == nsCSSKeyword._moz_use_system_font &&
!IsParsingCompoundProperty()) {
aValue.SetSystemFontValue();
return true;
}
}
for (;;) {
if (!ExpectSymbol(',', true))
break;
family.Append(',');
var nextFamily = new StringBuilder();
if (!ParseOneFamily(nextFamily, ref single))
return false;
// at this point unquoted keywords are not allowed
// as font family names but can appear within names
if (single) {
nsCSSKeyword keyword = nsCSSKeywords.LookupKeyword(nextFamily);
switch (keyword) {
case nsCSSKeyword.inherit:
case nsCSSKeyword.initial:
case nsCSSKeyword.@default:
case nsCSSKeyword._moz_initial:
case nsCSSKeyword._moz_use_system_font:
return false;
default:
break;
}
}
family.Append(nextFamily);
}
if (family.IsEmpty()) {
return false;
}
aValue.SetStringValue(family, nsCSSUnit.Families);
return true;
}
// <element>: -moz-element(# <element_id> )
internal bool ParseElement(ref nsCSSValue aValue)
{
// A non-iterative for loop to break out when an error occurs.
for (;;) {
if (!GetToken(true))
break;
if (mToken.mType == nsCSSTokenType.ID) {
aValue.SetStringValue(mToken.mIdentStr, nsCSSUnit.Element);
} else {
UngetToken();
break;
}
if (!ExpectSymbol(')', true))
break;
return true;
}
// If we detect a syntax error, we must match the opening parenthesis of the
// function with the closing parenthesis and skip all the tokens in between.
SkipUntil(')');
return false;
}
// The types to pass to ParseColorComponent. These correspond to the
// various datatypes that can go within rgb().
internal bool ParseColor(ref nsCSSValue aValue)
{
if (!GetToken(true)) {
{ if (!mSuppressErrors) mReporter.ReportUnexpected("PEColorEOF"); };
return false;
}
nsCSSToken tk = mToken;
var rgba = new nscolor();
switch (tk.mType) {
case nsCSSTokenType.ID:
case nsCSSTokenType.Hash:
// #xxyyzz
if (nscolor.HexToRGB(tk.mIdentStr, ref rgba)) {
aValue.SetColorValue(rgba);
return true;
}
break;
case nsCSSTokenType.Ident:
if (nscolor.ColorNameToRGB(tk.mIdentStr, ref rgba)) {
aValue.SetStringValue(tk.mIdentStr, nsCSSUnit.Ident);
return true;
}
else {
nsCSSKeyword keyword = nsCSSKeywords.LookupKeyword(tk.mIdentStr);
if (nsCSSKeyword.UNKNOWN < keyword) { // known keyword
int32_t value = 0;
if (nsCSSProps.FindKeyword(keyword, nsCSSProps.kColorKTable, ref value)) {
aValue.SetIntValue(value, nsCSSUnit.EnumColor);
return true;
}
}
}
break;
case nsCSSTokenType.Function:
if (mToken.mIdentStr.LowerCaseEqualsLiteral("rgb")) {
// rgb ( component , component , component )
uint8_t r = 0, g = 0, b = 0;
int32_t type = COLOR_TYPE_UNKNOWN;
if (ParseColorComponent(ref r, ref type, ',') &&
ParseColorComponent(ref g, ref type, ',') &&
ParseColorComponent(ref b, ref type, ')')) {
aValue.SetColorValue(nscolor.RGB(r,g,b));
return true;
}
SkipUntil(')');
return false;
}
else if (mToken.mIdentStr.LowerCaseEqualsLiteral("-moz-rgba") ||
mToken.mIdentStr.LowerCaseEqualsLiteral("rgba")) {
// rgba ( component , component , component , opacity )
uint8_t r = 0, g = 0, b = 0, a = 0;
int32_t type = COLOR_TYPE_UNKNOWN;
if (ParseColorComponent(ref r, ref type, ',') &&
ParseColorComponent(ref g, ref type, ',') &&
ParseColorComponent(ref b, ref type, ',') &&
ParseColorOpacity(ref a)) {
aValue.SetColorValue(nscolor.RGBA(r, g, b, a));
return true;
}
SkipUntil(')');
return false;
}
else if (mToken.mIdentStr.LowerCaseEqualsLiteral("hsl")) {
// hsl ( hue , saturation , lightness )
// "hue" is a number, "saturation" and "lightness" are percentages.
if (ParseHSLColor(ref rgba, ')')) {
aValue.SetColorValue(rgba);
return true;
}
SkipUntil(')');
return false;
}
else if (mToken.mIdentStr.LowerCaseEqualsLiteral("-moz-hsla") ||
mToken.mIdentStr.LowerCaseEqualsLiteral("hsla")) {
// hsla ( hue , saturation , lightness , opacity )
// "hue" is a number, "saturation" and "lightness" are percentages,
// "opacity" is a number.
uint8_t a = 0;
if (ParseHSLColor(ref rgba, ',') &&
ParseColorOpacity(ref a)) {
aValue.SetColorValue(nscolor.RGBA(rgba.R, rgba.G,
rgba.B, a));
return true;
}
SkipUntil(')');
return false;
}
break;
default:
break;
}
// try 'xxyyzz' without '#' prefix for compatibility with IE and Nav4x (bug 23236 and 45804)
// TODO support hashless colors
// It's not a color
{ if (!mSuppressErrors) mReporter.ReportUnexpected("PEColorNotColor", mToken); };
UngetToken();
return false;
}