static PassRefPtrWillBeRawPtr<CSSValue> parseKeywordValue(CSSPropertyID propertyId, const String& string)
{
ASSERT(!string.isEmpty());
if (!CSSParserFastPaths::isKeywordPropertyID(propertyId)) {
// All properties accept the values of "initial" and "inherit".
String lowerCaseString = string.lower();
if (lowerCaseString != "initial" && lowerCaseString != "inherit")
return nullptr;
// Parse initial/inherit shorthands using the CSSPropertyParser.
if (shorthandForProperty(propertyId).length())
return nullptr;
}
CSSParserString cssString;
cssString.init(string);
CSSValueID valueID = cssValueKeywordID(cssString);
if (!valueID)
return nullptr;
if (valueID == CSSValueInherit)
return cssValuePool().createInheritedValue();
if (valueID == CSSValueInitial)
return cssValuePool().createExplicitInitialValue();
if (CSSParserFastPaths::isValidKeywordPropertyAndValue(propertyId, valueID))
return cssValuePool().createIdentifierValue(valueID);
return nullptr;
}
CSSParserString CSSTokenizer::registerString(const String& string)
{
m_scope.storeString(string);
CSSParserString result;
result.init(string);
return result;
}
PassRefPtrWillBeRawPtr<CSSValue> CSSParserFastPaths::parseColor(const String& string, bool quirksMode)
{
ASSERT(!string.isEmpty());
CSSParserString cssString;
cssString.init(string);
CSSValueID valueID = cssValueKeywordID(cssString);
if (valueID == CSSValueWebkitText || valueID == CSSValueCurrentcolor || valueID == CSSValueGrey
|| (valueID >= CSSValueAqua && valueID <= CSSValueWindowtext) || valueID == CSSValueMenu
|| (quirksMode && valueID >= CSSValueWebkitFocusRingColor && valueID < CSSValueWebkitText))
return cssValuePool().createIdentifierValue(valueID);
RGBA32 color;
// Fast path for hex colors and rgb()/rgba() colors
bool parseResult;
if (string.is8Bit())
parseResult = fastParseColorInternal(color, string.characters8(), string.length(), quirksMode);
else
parseResult = fastParseColorInternal(color, string.characters16(), string.length(), quirksMode);
if (parseResult)
return cssValuePool().createColorValue(color);
Color namedColor;
if (!namedColor.setNamedColor(string))
return nullptr;
return cssValuePool().createColorValue(namedColor.rgb());
}
static PassRefPtrWillBeRawPtr<CSSValue> parseColorValue(CSSPropertyID propertyId, const String& string, CSSParserMode cssParserMode)
{
ASSERT(!string.isEmpty());
bool quirksMode = isQuirksModeBehavior(cssParserMode);
if (!isColorPropertyID(propertyId))
return nullptr;
CSSParserString cssString;
cssString.init(string);
CSSValueID valueID = cssValueKeywordID(cssString);
bool validPrimitive = false;
if (valueID == CSSValueWebkitText) {
validPrimitive = true;
} else if (valueID == CSSValueCurrentcolor) {
validPrimitive = true;
} else if ((valueID >= CSSValueAqua && valueID <= CSSValueWindowtext) || valueID == CSSValueMenu
|| (quirksMode && valueID >= CSSValueWebkitFocusRingColor && valueID < CSSValueWebkitText)) {
validPrimitive = true;
}
if (validPrimitive)
return cssValuePool().createIdentifierValue(valueID);
RGBA32 color;
if (!CSSPropertyParser::fastParseColor(color, string, !quirksMode && string[0] != '#'))
return nullptr;
return cssValuePool().createColorValue(color);
}
bool CSSVariableParser::isValidVariableName(const CSSParserToken& token)
{
if (token.type() != IdentToken)
return false;
CSSParserString value = token.value();
return value.length() >= 2 && value[0] == '-' && value[1] == '-';
}
CSSParserString CSSTokenizerInputStream::rangeAsCSSParserString(unsigned start, unsigned length) const
{
ASSERT(start + length <= m_stringLength);
CSSParserString result;
if (m_string->is8Bit())
result.init(m_string->characters8() + start, length);
else
result.init(m_string->characters16() + start, length);
return result;
}
bool CSSParser::parseSystemColor(RGBA32& color, const String& colorString)
{
CSSParserString cssColor;
cssColor.init(colorString);
CSSValueID id = cssValueKeywordID(cssColor);
if (!CSSPropertyParser::isSystemColor(id))
return false;
Color parsedColor = LayoutTheme::theme().systemColor(id);
color = parsedColor.rgb();
return true;
}
// http://dev.w3.org/csswg/css-syntax/#consume-ident-like-token
CSSParserToken CSSTokenizer::consumeIdentLikeToken()
{
CSSParserString name = consumeName();
if (consumeIfNext('(')) {
if (name.equalIgnoringASCIICase("url")) {
// The spec is slightly different so as to avoid dropping whitespace
// tokens, but they wouldn't be used and this is easier.
consumeUntilNonWhitespace();
UChar next = m_input.nextInputChar();
if (next != '"' && next != '\'')
return consumeUrlToken();
}
return blockStart(LeftParenthesisToken, FunctionToken, name);
}
return CSSParserToken(IdentToken, name);
}
template<typename CharacterType> void CSSVariableData::updateTokens(const CSSParserTokenRange& range)
{
const CharacterType* currentOffset = m_backingString.getCharacters<CharacterType>();
for (const CSSParserToken& token : range) {
if (token.hasStringBacking()) {
unsigned length = token.value().length();
CSSParserString parserString;
parserString.init(currentOffset, length);
m_tokens.append(token.copyWithUpdatedString(parserString));
currentOffset += length;
} else {
m_tokens.append(token);
}
}
ASSERT(currentOffset == m_backingString.getCharacters<CharacterType>() + m_backingString.length());
}
void MediaQueryData::addParserValue(MediaQueryTokenType type, const MediaQueryToken& token)
{
CSSParserValue value;
if (type == NumberToken || type == PercentageToken || type == DimensionToken) {
value.setFromNumber(token.numericValue(), token.unitType());
value.isInt = (token.numericValueType() == IntegerValueType);
} else if (type == DelimiterToken) {
value.unit = CSSParserValue::Operator;
value.iValue = token.delimiter();
} else {
CSSParserFunction* function = new CSSParserFunction;
function->name.init(token.value());
value.setFromFunction(function);
CSSParserString tokenValue;
tokenValue.init(token.value());
value.id = cssValueKeywordID(tokenValue);
}
m_valueList.addValue(value);
}
void MediaQueryData::addParserValue(CSSParserTokenType type, const CSSParserToken& token)
{
CSSParserValue value;
if (type == NumberToken || type == PercentageToken || type == DimensionToken) {
value.setFromNumber(token.numericValue(), token.unitType());
value.isInt = (token.numericValueType() == IntegerValueType);
} else if (type == DelimiterToken) {
value.unit = CSSParserValue::Operator;
value.iValue = token.delimiter();
value.id = CSSValueInvalid;
value.isInt = false;
} else {
CSSParserString tokenValue;
tokenValue.init(token.value());
value.unit = CSSPrimitiveValue::CSS_IDENT;
value.string = tokenValue;
value.id = cssValueKeywordID(tokenValue);
value.isInt = false;
}
m_valueList.addValue(value);
}
void BisonCSSParser::tokenToLowerCase(CSSParserString& token)
{
// Since it's our internal token, we know that we created it out
// of our writable work buffers. Therefore the const_cast is just
// ugly and not a potential crash.
size_t length = token.length();
if (token.is8Bit()) {
makeLower(token.characters8(), const_cast<LChar*>(token.characters8()), length);
} else {
makeLower(token.characters16(), const_cast<UChar*>(token.characters16()), length);
}
}
void CSSVariableData::consumeAndUpdateTokens(const CSSParserTokenRange& range)
{
StringBuilder stringBuilder;
CSSParserTokenRange localRange = range;
while (!localRange.atEnd()) {
CSSParserToken token = localRange.consume();
if (token.hasStringBacking()) {
CSSParserString value = token.value();
if (value.is8Bit())
stringBuilder.append(value.characters8(), value.length());
else
stringBuilder.append(value.characters16(), value.length());
}
}
m_backingString = stringBuilder.toString();
if (m_backingString.is8Bit())
updateTokens<LChar>(range);
else
updateTokens<UChar>(range);
}
static CSSParserString toParserString(const String& string)
{
CSSParserString result;
result.init(string);
return result;
}