static PassRefPtrWillBeRawPtr<CSSValue> parseSimpleLengthValue(CSSPropertyID propertyId, const String& string, CSSParserMode cssParserMode)
{
ASSERT(!string.isEmpty());
bool acceptsNegativeNumbers = false;
// In @viewport, width and height are shorthands, not simple length values.
if (isCSSViewportParsingEnabledForMode(cssParserMode) || !isSimpleLengthPropertyID(propertyId, acceptsNegativeNumbers))
return nullptr;
unsigned length = string.length();
double number;
CSSPrimitiveValue::UnitType unit = CSSPrimitiveValue::CSS_NUMBER;
if (string.is8Bit()) {
if (!parseSimpleLength(string.characters8(), length, unit, number))
return nullptr;
} else {
if (!parseSimpleLength(string.characters16(), length, unit, number))
return nullptr;
}
if (unit == CSSPrimitiveValue::CSS_NUMBER) {
bool quirksMode = isQuirksModeBehavior(cssParserMode);
if (number && !quirksMode)
return nullptr;
unit = CSSPrimitiveValue::CSS_PX;
}
if (number < 0 && !acceptsNegativeNumbers)
return nullptr;
return cssValuePool().createValue(number, unit);
}
static CSSValue* parseSimpleLengthValue(CSSPropertyID propertyId,
const String& string,
CSSParserMode cssParserMode) {
ASSERT(!string.isEmpty());
bool acceptsNegativeNumbers = false;
// In @viewport, width and height are shorthands, not simple length values.
if (isCSSViewportParsingEnabledForMode(cssParserMode) ||
!isSimpleLengthPropertyID(propertyId, acceptsNegativeNumbers))
return nullptr;
unsigned length = string.length();
double number;
CSSPrimitiveValue::UnitType unit = CSSPrimitiveValue::UnitType::Number;
if (string.is8Bit()) {
if (!parseSimpleLength(string.characters8(), length, unit, number))
return nullptr;
} else {
if (!parseSimpleLength(string.characters16(), length, unit, number))
return nullptr;
}
if (unit == CSSPrimitiveValue::UnitType::Number) {
if (cssParserMode == SVGAttributeMode)
unit = CSSPrimitiveValue::UnitType::UserUnits;
else if (!number)
unit = CSSPrimitiveValue::UnitType::Pixels;
else
return nullptr;
}
if (number < 0 && !acceptsNegativeNumbers)
return nullptr;
return CSSPrimitiveValue::create(number, unit);
}
static bool parseTransformTranslateArguments(CharType*& pos, CharType* end, unsigned expectedCount, CSSFunctionValue* transformValue)
{
while (expectedCount) {
size_t delimiter = WTF::find(pos, end - pos, expectedCount == 1 ? ')' : ',');
if (delimiter == kNotFound)
return false;
unsigned argumentLength = static_cast<unsigned>(delimiter);
CSSPrimitiveValue::UnitType unit = CSSPrimitiveValue::CSS_NUMBER;
double number;
if (!parseSimpleLength(pos, argumentLength, unit, number))
return false;
if (unit != CSSPrimitiveValue::CSS_PX && (number || unit != CSSPrimitiveValue::CSS_NUMBER))
return false;
transformValue->append(cssValuePool().createValue(number, CSSPrimitiveValue::CSS_PX));
pos += argumentLength + 1;
--expectedCount;
}
return true;
}