PassRefPtr<CSSValue> LengthStyleInterpolation::interpolableValueToLength(InterpolableValue* value, ValueRange range)
{
InterpolableList* listValue = toInterpolableList(value);
unsigned unitCount = 0;
for (size_t i = 0; i < CSSPrimitiveValue::LengthUnitTypeCount; i++) {
const InterpolableNumber* subValue = toInterpolableNumber(listValue->get(i));
if (subValue->value()) {
unitCount++;
}
}
switch (unitCount) {
case 0:
return CSSPrimitiveValue::create(0, CSSPrimitiveValue::CSS_PX);
case 1:
for (size_t i = 0; i < CSSPrimitiveValue::LengthUnitTypeCount; i++) {
const InterpolableNumber* subValue = toInterpolableNumber(listValue->get(i));
double value = subValue->value();
if (value) {
if (range == ValueRangeNonNegative && value < 0)
value = 0;
return CSSPrimitiveValue::create(value, toUnitType(i));
}
}
ASSERT_NOT_REACHED();
default:
return CSSPrimitiveValue::create(CSSCalcValue::create(constructCalcExpression(nullptr, listValue, 0), range));
}
}
static PassRefPtrWillBeRawPtr<CSSValue> createCSSValue(const InterpolableList& values, bool hasPercentage, ValueRange range)
{
RefPtrWillBeRawPtr<CSSPrimitiveValue> result;
size_t firstUnitIndex = CSSPrimitiveValue::LengthUnitTypeCount;
size_t unitTypeCount = 0;
for (size_t i = 0; i < CSSPrimitiveValue::LengthUnitTypeCount; i++) {
if ((hasPercentage && i == CSSPrimitiveValue::UnitTypePercentage) || toInterpolableNumber(values.get(i))->value()) {
unitTypeCount++;
if (unitTypeCount == 1)
firstUnitIndex = i;
}
}
switch (unitTypeCount) {
case 0:
return CSSPrimitiveValue::create(0, CSSPrimitiveValue::UnitType::Pixels);
case 1: {
double value = clampToRange(toInterpolableNumber(values.get(firstUnitIndex))->value(), range);
return CSSPrimitiveValue::create(value, toUnitType(firstUnitIndex));
}
default:
return CSSPrimitiveValue::create(CSSCalcValue::create(createCalcExpression(values, hasPercentage), range));
}
}
static PassRefPtrWillBeRawPtr<CSSCalcExpressionNode> createCalcExpression(const InterpolableList& values, bool hasPercentage)
{
RefPtrWillBeRawPtr<CSSCalcExpressionNode> result = nullptr;
for (size_t i = 0; i < CSSPrimitiveValue::LengthUnitTypeCount; i++) {
double value = toInterpolableNumber(values.get(i))->value();
if (value || (i == CSSPrimitiveValue::UnitTypePercentage && hasPercentage)) {
RefPtrWillBeRawPtr<CSSCalcExpressionNode> node = CSSCalcValue::createExpressionNode(CSSPrimitiveValue::create(value, toUnitType(i)));
result = result ? CSSCalcValue::createExpressionNode(result.release(), node.release(), CalcAdd) : node.release();
}
}
ASSERT(result);
return result.release();
}