bool NumberInputType::sizeShouldIncludeDecoration(int defaultSize, int& preferredSize) const
{
preferredSize = defaultSize;
const String stepString = element()->fastGetAttribute(stepAttr);
if (equalIgnoringCase(stepString, "any"))
return false;
const Decimal minimum = parseToDecimalForNumberType(element()->fastGetAttribute(minAttr));
if (!minimum.isFinite())
return false;
const Decimal maximum = parseToDecimalForNumberType(element()->fastGetAttribute(maxAttr));
if (!maximum.isFinite())
return false;
const Decimal step = parseToDecimalForNumberType(stepString, 1);
ASSERT(step.isFinite());
RealNumberRenderSize size = calculateRenderSize(minimum).max(calculateRenderSize(maximum).max(calculateRenderSize(step)));
preferredSize = size.sizeBeforeDecimalPoint + size.sizeAfteDecimalPoint + (size.sizeAfteDecimalPoint ? 1 : 0);
return true;
}
StepRange NumberInputType::createStepRange(AnyStepHandling anyStepHandling) const
{
DEFINE_STATIC_LOCAL(const StepRange::StepDescription, stepDescription, (numberDefaultStep, numberDefaultStepBase, numberStepScaleFactor));
const Decimal stepBase = parseToDecimalForNumberType(element()->fastGetAttribute(minAttr), numberDefaultStepBase);
// FIXME: We should use numeric_limits<double>::max for number input type.
const Decimal floatMax = Decimal::fromDouble(numeric_limits<float>::max());
const Decimal minimum = parseToNumber(element()->fastGetAttribute(minAttr), -floatMax);
const Decimal maximum = parseToNumber(element()->fastGetAttribute(maxAttr), floatMax);
const Decimal step = StepRange::parseStep(anyStepHandling, stepDescription, element()->fastGetAttribute(stepAttr));
return StepRange(stepBase, minimum, maximum, step, stepDescription);
}
Decimal StepRange::parseStep(AnyStepHandling anyStepHandling, const StepDescription& stepDescription, const String& stepString)
{
if (stepString.isEmpty())
return stepDescription.defaultValue();
if (equalIgnoringCase(stepString, "any")) {
switch (anyStepHandling) {
case RejectAny:
return Decimal::nan();
case AnyIsDefaultStep:
return stepDescription.defaultValue();
default:
ASSERT_NOT_REACHED();
}
}
Decimal step = parseToDecimalForNumberType(stepString);
if (!step.isFinite() || step <= 0)
return stepDescription.defaultValue();
switch (stepDescription.stepValueShouldBe) {
case StepValueShouldBeReal:
step *= stepDescription.stepScaleFactor;
break;
case ParsedStepValueShouldBeInteger:
// For date, month, and week, the parsed value should be an integer for some types.
step = std::max(step.round(), Decimal(1));
step *= stepDescription.stepScaleFactor;
break;
case ScaledStepValueShouldBeInteger:
// For datetime, datetime-local, time, the result should be an integer.
step *= stepDescription.stepScaleFactor;
step = std::max(step.round(), Decimal(1));
break;
default:
ASSERT_NOT_REACHED();
}
ASSERT(step > 0);
return step;
}
Decimal NumberInputType::parseToNumber(const String& src, const Decimal& defaultValue) const
{
return parseToDecimalForNumberType(src, defaultValue);
}
inline static Decimal sliderPosition(HTMLInputElement* element)
{
const StepRange stepRange(element->createStepRange(RejectAny));
const Decimal oldValue = parseToDecimalForNumberType(element->value(), stepRange.defaultValue());
return stepRange.proportionFromValue(stepRange.clampValue(oldValue));
}
Decimal parseToDecimalForNumberType(const String& string)
{
return parseToDecimalForNumberType(string, Decimal::nan());
}