bool InputType::rangeOverflow(const String& value) const
{
if (!isSteppable())
return false;
const Decimal numericValue = parseToNumberOrNaN(value);
if (!numericValue.isFinite())
return false;
return numericValue > createStepRange(RejectAny).maximum();
}
bool InputType::isOutOfRange(const String& value) const
{
if (!isSteppable())
return false;
const Decimal numericValue = parseToNumberOrNaN(value);
if (!numericValue.isFinite())
return true;
StepRange stepRange(createStepRange(RejectAny));
return numericValue < stepRange.minimum() || numericValue > stepRange.maximum();
}
String InputType::validationMessage() const
{
const String value = element().value();
// The order of the following checks is meaningful. e.g. We'd like to show the
// badInput message even if the control has other validation errors.
if (hasBadInput())
return badInputText();
if (valueMissing(value))
return valueMissingText();
if (typeMismatch())
return typeMismatchText();
if (patternMismatch(value))
return locale().queryString(WebLocalizedString::ValidationPatternMismatch);
if (element().tooLong())
return locale().validationMessageTooLongText(value.length(), element().maxLength());
if (!isSteppable())
return emptyString();
const Decimal numericValue = parseToNumberOrNaN(value);
if (!numericValue.isFinite())
return emptyString();
StepRange stepRange(createStepRange(RejectAny));
if (numericValue < stepRange.minimum())
return rangeUnderflowText(stepRange.minimum());
if (numericValue > stepRange.maximum())
return rangeOverflowText(stepRange.maximum());
if (stepRange.stepMismatch(numericValue)) {
ASSERT(stepRange.hasStep());
Decimal candidate1 = stepRange.clampValue(numericValue);
String localizedCandidate1 = localizeValue(serialize(candidate1));
Decimal candidate2 = candidate1 < numericValue ? candidate1 + stepRange.step() : candidate1 - stepRange.step();
if (!candidate2.isFinite() || candidate2 < stepRange.minimum() || candidate2 > stepRange.maximum())
return locale().queryString(WebLocalizedString::ValidationStepMismatchCloseToLimit, localizedCandidate1);
String localizedCandidate2 = localizeValue(serialize(candidate2));
if (candidate1 < candidate2)
return locale().queryString(WebLocalizedString::ValidationStepMismatch, localizedCandidate1, localizedCandidate2);
return locale().queryString(WebLocalizedString::ValidationStepMismatch, localizedCandidate2, localizedCandidate1);
}
return emptyString();
}
bool StepRange::stepMismatch(const Decimal& valueForCheck) const
{
if (!m_hasStep)
return false;
if (!valueForCheck.isFinite())
return false;
const Decimal value = (valueForCheck - m_stepBase).abs();
if (!value.isFinite())
return false;
// Decimal's fractional part size is DBL_MAN_DIG-bit. If the current value
// is greater than step*2^DBL_MANT_DIG, the following computation for
// remainder makes no sense.
DEFINE_STATIC_LOCAL(const Decimal, twoPowerOfDoubleMantissaBits, (Decimal::Positive, 0, UINT64_C(1) << DBL_MANT_DIG));
if (value / twoPowerOfDoubleMantissaBits > m_step)
return false;
// The computation follows HTML5 4.10.7.2.10 `The step attribute' :
// ... that number subtracted from the step base is not an integral multiple
// of the allowed value step, the element is suffering from a step mismatch.
const Decimal remainder = (value - m_step * (value / m_step).round()).abs();
// Accepts errors in lower fractional part which IEEE 754 single-precision
// can't represent.
const Decimal computedAcceptableError = acceptableError();
return computedAcceptableError < remainder && remainder < (m_step - computedAcceptableError);
}
bool InputType::isInRange(const String& value) const
{
if (!isSteppable())
return false;
StepRange stepRange(createStepRange(RejectAny));
if (!stepRange.hasRangeLimitations())
return false;
const Decimal numericValue = parseToNumberOrNaN(value);
if (!numericValue.isFinite())
return true;
return numericValue >= stepRange.minimum() && numericValue <= stepRange.maximum();
}
double
nsRangeFrame::GetValueAsFractionOfRange()
{
MOZ_ASSERT(mContent->IsHTML(nsGkAtoms::input), "bad cast");
dom::HTMLInputElement* input = static_cast<dom::HTMLInputElement*>(mContent);
MOZ_ASSERT(input->GetType() == NS_FORM_INPUT_RANGE);
Decimal value = input->GetValueAsDecimal();
Decimal minimum = input->GetMinimum();
Decimal maximum = input->GetMaximum();
MOZ_ASSERT(value.isFinite() && minimum.isFinite() && maximum.isFinite(),
"type=range should have a default maximum/minimum");
if (maximum <= minimum) {
MOZ_ASSERT(value == minimum, "Unsanitized value");
return 0.0;
}
MOZ_ASSERT(value >= minimum && value <= maximum, "Unsanitized value");
return ((value - minimum) / (maximum - minimum)).toDouble();
}
bool InputType::isOutOfRange(const String& value) const
{
if (!isSteppable())
return false;
// This function should return true if either validity.rangeUnderflow or
// validity.rangeOverflow are true.
// If the INPUT has no value, they are false.
const Decimal numericValue = parseToNumberOrNaN(value);
if (!numericValue.isFinite())
return false;
StepRange stepRange(createStepRange(RejectAny));
return stepRange.hasRangeLimitations() && (numericValue < stepRange.minimum() || numericValue > stepRange.maximum());
}
bool InputType::isInRange(const String& value) const
{
if (!isSteppable())
return false;
// This function should return true if both of validity.rangeUnderflow and
// validity.rangeOverflow are false.
// If the INPUT has no value, they are false.
const Decimal numericValue = parseToNumberOrNaN(value);
if (!numericValue.isFinite())
return true;
StepRange stepRange(createStepRange(RejectAny));
return numericValue >= stepRange.minimum() && numericValue <= stepRange.maximum();
}
String InputType::validationMessage() const
{
const String value = element()->value();
// The order of the following checks is meaningful. e.g. We'd like to show the
// valueMissing message even if the control has other validation errors.
if (valueMissing(value))
return valueMissingText();
if (typeMismatch())
return typeMismatchText();
if (hasBadInput())
return badInputText();
if (patternMismatch(value))
return validationMessagePatternMismatchText();
if (element()->tooLong())
return validationMessageTooLongText(numGraphemeClusters(value), element()->maxLength());
if (!isSteppable())
return emptyString();
const Decimal numericValue = parseToNumberOrNaN(value);
if (!numericValue.isFinite())
return emptyString();
StepRange stepRange(createStepRange(RejectAny));
if (numericValue < stepRange.minimum())
return validationMessageRangeUnderflowText(serialize(stepRange.minimum()));
if (numericValue > stepRange.maximum())
return validationMessageRangeOverflowText(serialize(stepRange.maximum()));
if (stepRange.stepMismatch(numericValue)) {
const String stepString = stepRange.hasStep() ? serializeForNumberType(stepRange.step() / stepRange.stepScaleFactor()) : emptyString();
return validationMessageStepMismatchText(serialize(stepRange.stepBase()), stepString);
}
return emptyString();
}
Decimal parseToDecimalForNumberType(const String& string, const Decimal& fallbackValue)
{
// http://www.whatwg.org/specs/web-apps/current-work/#floating-point-numbers and parseToDoubleForNumberType
// String::toDouble() accepts leading + and whitespace characters, which are not valid here.
const UChar firstCharacter = string[0];
if (firstCharacter != '-' && firstCharacter != '.' && !isASCIIDigit(firstCharacter))
return fallbackValue;
const Decimal value = Decimal::fromString(string);
if (!value.isFinite())
return fallbackValue;
// Numbers are considered finite IEEE 754 Double-precision floating point values.
const Decimal doubleMax = Decimal::fromDouble(std::numeric_limits<double>::max());
if (value < -doubleMax || value > doubleMax)
return fallbackValue;
// We return +0 for -0 case.
return value.isZero() ? Decimal(0) : value;
}
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 parseToDecimalForNumberType(const String& string, const Decimal& fallbackValue)
{
// See HTML5 2.5.4.3 `Real numbers.' and parseToDoubleForNumberType
// String::toDouble() accepts leading + and whitespace characters, which are not valid here.
const UChar firstCharacter = string[0];
if (firstCharacter != '-' && firstCharacter != '.' && !isASCIIDigit(firstCharacter))
return fallbackValue;
const Decimal value = Decimal::fromString(string);
if (!value.isFinite())
return fallbackValue;
// Numbers are considered finite IEEE 754 single-precision floating point values.
// See HTML5 2.5.4.3 `Real numbers.'
// FIXME: We should use numeric_limits<double>::max for number input type.
const Decimal floatMax = Decimal::fromDouble(std::numeric_limits<float>::max());
if (value < -floatMax || value > floatMax)
return fallbackValue;
// We return +0 for -0 case.
return value.isZero() ? Decimal(0) : value;
}
void
nsNumberControlFrame::SetValueOfAnonTextControl(const nsAString& aValue)
{
if (mHandlingInputEvent) {
// We have been called while our HTMLInputElement is processing a DOM
// 'input' event targeted at our anonymous text control. Our
// HTMLInputElement has taken the value of our anon text control and
// called SetValueInternal on itself to keep its own value in sync. As a
// result SetValueInternal has called us. In this one case we do not want
// to update our anon text control, especially since aValue will be the
// sanitized value, and only the internal value should be sanitized (not
// the value shown to the user, and certainly we shouldn't change it as
// they type).
return;
}
// Init to aValue so that we set aValue as the value of our text control if
// aValue isn't a valid number (in which case the HTMLInputElement's validity
// state will be set to invalid) or if aValue can't be localized:
nsAutoString localizedValue(aValue);
#ifdef ENABLE_INTL_API
// Try and localize the value we will set:
Decimal val = HTMLInputElement::StringToDecimal(aValue);
if (val.isFinite()) {
ICUUtils::LanguageTagIterForContent langTagIter(mContent);
ICUUtils::LocalizeNumber(val.toDouble(), langTagIter, localizedValue);
}
#endif
// We need to update the value of our anonymous text control here. Note that
// this must be its value, and not its 'value' attribute (the default value),
// since the default value is ignored once a user types into the text
// control.
HTMLInputElement::FromContent(mTextField)->SetValue(localizedValue);
}
void InputType::stepUpFromRenderer(int n)
{
// The differences from stepUp()/stepDown():
//
// Difference 1: the current value
// If the current value is not a number, including empty, the current value is assumed as 0.
// * If 0 is in-range, and matches to step value
// - The value should be the +step if n > 0
// - The value should be the -step if n < 0
// If -step or +step is out of range, new value should be 0.
// * If 0 is smaller than the minimum value
// - The value should be the minimum value for any n
// * If 0 is larger than the maximum value
// - The value should be the maximum value for any n
// * If 0 is in-range, but not matched to step value
// - The value should be the larger matched value nearest to 0 if n > 0
// e.g. <input type=number min=-100 step=3> -> 2
// - The value should be the smaler matched value nearest to 0 if n < 0
// e.g. <input type=number min=-100 step=3> -> -1
// As for date/datetime-local/month/time/week types, the current value is assumed as "the current local date/time".
// As for datetime type, the current value is assumed as "the current date/time in UTC".
// If the current value is smaller than the minimum value:
// - The value should be the minimum value if n > 0
// - Nothing should happen if n < 0
// If the current value is larger than the maximum value:
// - The value should be the maximum value if n < 0
// - Nothing should happen if n > 0
//
// Difference 2: clamping steps
// If the current value is not matched to step value:
// - The value should be the larger matched value nearest to 0 if n > 0
// e.g. <input type=number value=3 min=-100 step=3> -> 5
// - The value should be the smaler matched value nearest to 0 if n < 0
// e.g. <input type=number value=3 min=-100 step=3> -> 2
//
// n is assumed as -n if step < 0.
ASSERT(isSteppable());
if (!isSteppable())
return;
ASSERT(n);
if (!n)
return;
StepRange stepRange(createStepRange(AnyIsDefaultStep));
// FIXME: Not any changes after stepping, even if it is an invalid value, may be better.
// (e.g. Stepping-up for <input type="number" value="foo" step="any" /> => "foo")
if (!stepRange.hasStep())
return;
const Decimal step = stepRange.step();
int sign;
if (step > 0)
sign = n;
else if (step < 0)
sign = -n;
else
sign = 0;
String currentStringValue = element()->value();
Decimal current = parseToNumberOrNaN(currentStringValue);
if (!current.isFinite()) {
ExceptionCode ec;
current = defaultValueForStepUp();
const Decimal nextDiff = step * n;
if (current < stepRange.minimum() - nextDiff)
current = stepRange.minimum() - nextDiff;
if (current > stepRange.maximum() - nextDiff)
current = stepRange.maximum() - nextDiff;
setValueAsDecimal(current, DispatchInputAndChangeEvent, ec);
}
if ((sign > 0 && current < stepRange.minimum()) || (sign < 0 && current > stepRange.maximum())) {
ExceptionCode ec;
setValueAsDecimal(sign > 0 ? stepRange.minimum() : stepRange.maximum(), DispatchInputAndChangeEvent, ec);
} else {
ExceptionCode ec;
if (stepMismatch(element()->value())) {
ASSERT(!step.isZero());
const Decimal base = stepRange.stepBase();
Decimal newValue;
if (sign < 0)
newValue = base + ((current - base) / step).floor() * step;
else if (sign > 0)
newValue = base + ((current - base) / step).ceiling() * step;
else
newValue = current;
if (newValue < stepRange.minimum())
newValue = stepRange.minimum();
if (newValue > stepRange.maximum())
newValue = stepRange.maximum();
setValueAsDecimal(newValue, n == 1 || n == -1 ? DispatchInputAndChangeEvent : DispatchNoEvent, ec);
if (n > 1)
applyStep(n - 1, AnyIsDefaultStep, DispatchInputAndChangeEvent, ec);
else if (n < -1)
applyStep(n + 1, AnyIsDefaultStep, DispatchInputAndChangeEvent, ec);
} else
applyStep(n, AnyIsDefaultStep, DispatchInputAndChangeEvent, ec);
}
}
Decimal
nsRangeFrame::GetValueAtEventPoint(WidgetGUIEvent* aEvent)
{
MOZ_ASSERT(aEvent->eventStructType == NS_MOUSE_EVENT ||
aEvent->eventStructType == NS_TOUCH_EVENT,
"Unexpected event type - aEvent->refPoint may be meaningless");
MOZ_ASSERT(mContent->IsHTML(nsGkAtoms::input), "bad cast");
dom::HTMLInputElement* input = static_cast<dom::HTMLInputElement*>(mContent);
MOZ_ASSERT(input->GetType() == NS_FORM_INPUT_RANGE);
Decimal minimum = input->GetMinimum();
Decimal maximum = input->GetMaximum();
MOZ_ASSERT(minimum.isFinite() && maximum.isFinite(),
"type=range should have a default maximum/minimum");
if (maximum <= minimum) {
return minimum;
}
Decimal range = maximum - minimum;
LayoutDeviceIntPoint absPoint;
if (aEvent->eventStructType == NS_TOUCH_EVENT) {
MOZ_ASSERT(aEvent->AsTouchEvent()->touches.Length() == 1,
"Unexpected number of touches");
absPoint = LayoutDeviceIntPoint::FromUntyped(
aEvent->AsTouchEvent()->touches[0]->mRefPoint);
} else {
absPoint = aEvent->refPoint;
}
nsPoint point =
nsLayoutUtils::GetEventCoordinatesRelativeTo(aEvent,
LayoutDeviceIntPoint::ToUntyped(absPoint), this);
if (point == nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE)) {
// We don't want to change the current value for this error state.
return static_cast<dom::HTMLInputElement*>(mContent)->GetValueAsDecimal();
}
nsRect rangeContentRect = GetContentRectRelativeToSelf();
nsSize thumbSize;
if (IsThemed()) {
// We need to get the size of the thumb from the theme.
nsPresContext *presContext = PresContext();
bool notUsedCanOverride;
nsIntSize size;
presContext->GetTheme()->
GetMinimumWidgetSize(presContext, this, NS_THEME_RANGE_THUMB, &size,
¬UsedCanOverride);
thumbSize.width = presContext->DevPixelsToAppUnits(size.width);
thumbSize.height = presContext->DevPixelsToAppUnits(size.height);
MOZ_ASSERT(thumbSize.width > 0 && thumbSize.height > 0);
} else {
nsIFrame* thumbFrame = mThumbDiv->GetPrimaryFrame();
if (thumbFrame) { // diplay:none?
thumbSize = thumbFrame->GetSize();
}
}
Decimal fraction;
if (IsHorizontal()) {
nscoord traversableDistance = rangeContentRect.width - thumbSize.width;
if (traversableDistance <= 0) {
return minimum;
}
nscoord posAtStart = rangeContentRect.x + thumbSize.width/2;
nscoord posAtEnd = posAtStart + traversableDistance;
nscoord posOfPoint = mozilla::clamped(point.x, posAtStart, posAtEnd);
fraction = Decimal(posOfPoint - posAtStart) / Decimal(traversableDistance);
if (StyleVisibility()->mDirection == NS_STYLE_DIRECTION_RTL) {
fraction = Decimal(1) - fraction;
}
} else {
nscoord traversableDistance = rangeContentRect.height - thumbSize.height;
if (traversableDistance <= 0) {
return minimum;
}
nscoord posAtStart = rangeContentRect.y + thumbSize.height/2;
nscoord posAtEnd = posAtStart + traversableDistance;
nscoord posOfPoint = mozilla::clamped(point.y, posAtStart, posAtEnd);
// For a vertical range, the top (posAtStart) is the highest value, so we
// subtract the fraction from 1.0 to get that polarity correct.
fraction = Decimal(1) - Decimal(posOfPoint - posAtStart) / Decimal(traversableDistance);
}
MOZ_ASSERT(fraction >= Decimal(0) && fraction <= Decimal(1));
return minimum + fraction * range;
}
void InputType::stepUpFromRenderer(int n)
{
// The only difference from stepUp()/stepDown() is the extra treatment
// of the current value before applying the step:
//
// If the current value is not a number, including empty, the current value is assumed as 0.
// * If 0 is in-range, and matches to step value
// - The value should be the +step if n > 0
// - The value should be the -step if n < 0
// If -step or +step is out of range, new value should be 0.
// * If 0 is smaller than the minimum value
// - The value should be the minimum value for any n
// * If 0 is larger than the maximum value
// - The value should be the maximum value for any n
// * If 0 is in-range, but not matched to step value
// - The value should be the larger matched value nearest to 0 if n > 0
// e.g. <input type=number min=-100 step=3> -> 2
// - The value should be the smaler matched value nearest to 0 if n < 0
// e.g. <input type=number min=-100 step=3> -> -1
// As for date/datetime-local/month/time/week types, the current value is assumed as "the current local date/time".
// As for datetime type, the current value is assumed as "the current date/time in UTC".
// If the current value is smaller than the minimum value:
// - The value should be the minimum value if n > 0
// - Nothing should happen if n < 0
// If the current value is larger than the maximum value:
// - The value should be the maximum value if n < 0
// - Nothing should happen if n > 0
//
// n is assumed as -n if step < 0.
ASSERT(isSteppable());
if (!isSteppable())
return;
ASSERT(n);
if (!n)
return;
StepRange stepRange(createStepRange(AnyIsDefaultStep));
// FIXME: Not any changes after stepping, even if it is an invalid value, may be better.
// (e.g. Stepping-up for <input type="number" value="foo" step="any" /> => "foo")
if (!stepRange.hasStep())
return;
EventQueueScope scope;
const Decimal step = stepRange.step();
int sign;
if (step > 0)
sign = n;
else if (step < 0)
sign = -n;
else
sign = 0;
Decimal current = parseToNumberOrNaN(element().value());
if (!current.isFinite()) {
current = defaultValueForStepUp();
const Decimal nextDiff = step * n;
if (current < stepRange.minimum() - nextDiff)
current = stepRange.minimum() - nextDiff;
if (current > stepRange.maximum() - nextDiff)
current = stepRange.maximum() - nextDiff;
setValueAsDecimal(current, DispatchNoEvent, IGNORE_EXCEPTION);
}
if ((sign > 0 && current < stepRange.minimum()) || (sign < 0 && current > stepRange.maximum())) {
setValueAsDecimal(sign > 0 ? stepRange.minimum() : stepRange.maximum(), DispatchChangeEvent, IGNORE_EXCEPTION);
return;
}
applyStep(current, n, AnyIsDefaultStep, DispatchChangeEvent, IGNORE_EXCEPTION);
}
double BaseDateAndTimeInputType::valueAsDouble() const
{
const Decimal value = parseToNumber(element()->value(), Decimal::nan());
return value.isFinite() ? value.toDouble() : DateComponents::invalidMilliseconds();
}
void InputType::applyStep(const Decimal& current, int count, AnyStepHandling anyStepHandling, TextFieldEventBehavior eventBehavior, ExceptionState& exceptionState)
{
// https://html.spec.whatwg.org/multipage/forms.html#dom-input-stepup
StepRange stepRange(createStepRange(anyStepHandling));
// 2. If the element has no allowed value step, then throw an
// InvalidStateError exception, and abort these steps.
if (!stepRange.hasStep()) {
exceptionState.throwDOMException(InvalidStateError, "This form element does not have an allowed value step.");
return;
}
// 3. If the element has a minimum and a maximum and the minimum is greater
// than the maximum, then abort these steps.
if (stepRange.minimum() > stepRange.maximum())
return;
// 4. If the element has a minimum and a maximum and there is no value
// greater than or equal to the element's minimum and less than or equal to
// the element's maximum that, when subtracted from the step base, is an
// integral multiple of the allowed value step, then abort these steps.
Decimal alignedMaximum = stepRange.stepSnappedMaximum();
if (!alignedMaximum.isFinite())
return;
Decimal base = stepRange.stepBase();
Decimal step = stepRange.step();
EventQueueScope scope;
Decimal newValue = current;
const AtomicString& stepString = element().fastGetAttribute(stepAttr);
if (!equalIgnoringCase(stepString, "any") && stepRange.stepMismatch(current)) {
// Snap-to-step / clamping steps
// If the current value is not matched to step value:
// - The value should be the larger matched value nearest to 0 if count > 0
// e.g. <input type=number value=3 min=-100 step=3> -> 5
// - The value should be the smaller matched value nearest to 0 if count < 0
// e.g. <input type=number value=3 min=-100 step=3> -> 2
//
DCHECK(!step.isZero());
if (count < 0) {
newValue = base + ((newValue - base) / step).floor() * step;
++count;
} else if (count > 0) {
newValue = base + ((newValue - base) / step).ceil() * step;
--count;
}
}
newValue = newValue + stepRange.step() * count;
if (!equalIgnoringCase(stepString, "any"))
newValue = stepRange.alignValueForStep(current, newValue);
// 7. If the element has a minimum, and value is less than that minimum,
// then set value to the smallest value that, when subtracted from the step
// base, is an integral multiple of the allowed value step, and that is more
// than or equal to minimum.
// 8. If the element has a maximum, and value is greater than that maximum,
// then set value to the largest value that, when subtracted from the step
// base, is an integral multiple of the allowed value step, and that is less
// than or equal to maximum.
if (newValue > stepRange.maximum()) {
newValue = alignedMaximum;
} else if (newValue < stepRange.minimum()) {
const Decimal alignedMinimum = base + ((stepRange.minimum() - base) / step).ceil() * step;
DCHECK_GE(alignedMinimum, stepRange.minimum());
newValue = alignedMinimum;
}
// 9. Let value as string be the result of running the algorithm to convert
// a number to a string, as defined for the input element's type attribute's
// current state, on value.
// 10. Set the value of the element to value as string.
setValueAsDecimal(newValue, eventBehavior, exceptionState);
if (AXObjectCache* cache = element().document().existingAXObjectCache())
cache->handleValueChanged(&element());
}
void SliderThumbElement::setPositionFromPoint(const LayoutPoint& point) {
HTMLInputElement* input(hostInput());
Element* trackElement = input->userAgentShadowRoot()->getElementById(
ShadowElementNames::sliderTrack());
if (!input->layoutObject() || !layoutBox() || !trackElement->layoutBox())
return;
LayoutPoint offset = LayoutPoint(
input->layoutObject()->absoluteToLocal(FloatPoint(point), UseTransforms));
bool isVertical = hasVerticalAppearance(input);
bool isLeftToRightDirection = layoutBox()->style()->isLeftToRightDirection();
LayoutUnit trackSize;
LayoutUnit position;
LayoutUnit currentPosition;
// We need to calculate currentPosition from absolute points becaue the
// layoutObject for this node is usually on a layer and layoutBox()->x() and
// y() are unusable.
// FIXME: This should probably respect transforms.
LayoutPoint absoluteThumbOrigin =
layoutBox()->absoluteBoundingBoxRectIgnoringTransforms().location();
LayoutPoint absoluteSliderContentOrigin =
LayoutPoint(input->layoutObject()->localToAbsolute());
IntRect trackBoundingBox =
trackElement->layoutObject()->absoluteBoundingBoxRectIgnoringTransforms();
IntRect inputBoundingBox =
input->layoutObject()->absoluteBoundingBoxRectIgnoringTransforms();
if (isVertical) {
trackSize = trackElement->layoutBox()->contentHeight() -
layoutBox()->size().height();
position = offset.y() - layoutBox()->size().height() / 2 -
trackBoundingBox.y() + inputBoundingBox.y() -
layoutBox()->marginBottom();
currentPosition = absoluteThumbOrigin.y() - absoluteSliderContentOrigin.y();
} else {
trackSize =
trackElement->layoutBox()->contentWidth() - layoutBox()->size().width();
position = offset.x() - layoutBox()->size().width() / 2 -
trackBoundingBox.x() + inputBoundingBox.x();
position -= isLeftToRightDirection ? layoutBox()->marginLeft()
: layoutBox()->marginRight();
currentPosition = absoluteThumbOrigin.x() - absoluteSliderContentOrigin.x();
}
position = std::min(position, trackSize).clampNegativeToZero();
const Decimal ratio =
Decimal::fromDouble(static_cast<double>(position) / trackSize);
const Decimal fraction =
isVertical || !isLeftToRightDirection ? Decimal(1) - ratio : ratio;
StepRange stepRange(input->createStepRange(RejectAny));
Decimal value = stepRange.clampValue(stepRange.valueFromProportion(fraction));
Decimal closest = input->findClosestTickMarkValue(value);
if (closest.isFinite()) {
double closestFraction = stepRange.proportionFromValue(closest).toDouble();
double closestRatio = isVertical || !isLeftToRightDirection
? 1.0 - closestFraction
: closestFraction;
LayoutUnit closestPosition(trackSize * closestRatio);
const LayoutUnit snappingThreshold(5);
if ((closestPosition - position).abs() <= snappingThreshold)
value = closest;
}
String valueString = serializeForNumberType(value);
if (valueString == input->value())
return;
// FIXME: This is no longer being set from renderer. Consider updating the
// method name.
input->setValueFromRenderer(valueString);
if (layoutObject())
layoutObject()->setNeedsLayoutAndFullPaintInvalidation(
LayoutInvalidationReason::SliderValueChanged);
}
String NumberInputType::serialize(const Decimal& value) const
{
if (!value.isFinite())
return String();
return serializeForNumberType(value);
}
void RangeInputType::handleKeydownEvent(KeyboardEvent* event) {
if (element().isDisabledOrReadOnly())
return;
const String& key = event->key();
const Decimal current = parseToNumberOrNaN(element().value());
DCHECK(current.isFinite());
StepRange stepRange(createStepRange(RejectAny));
// FIXME: We can't use stepUp() for the step value "any". So, we increase
// or decrease the value by 1/100 of the value range. Is it reasonable?
const Decimal step =
equalIgnoringCase(element().fastGetAttribute(stepAttr), "any")
? (stepRange.maximum() - stepRange.minimum()) / 100
: stepRange.step();
const Decimal bigStep =
std::max((stepRange.maximum() - stepRange.minimum()) / 10, step);
TextDirection dir = LTR;
bool isVertical = false;
if (element().layoutObject()) {
dir = computedTextDirection();
ControlPart part = element().layoutObject()->style()->appearance();
isVertical = part == SliderVerticalPart;
}
Decimal newValue;
if (key == "ArrowUp")
newValue = current + step;
else if (key == "ArrowDown")
newValue = current - step;
else if (key == "ArrowLeft")
newValue = (isVertical || dir == RTL) ? current + step : current - step;
else if (key == "ArrowRight")
newValue = (isVertical || dir == RTL) ? current - step : current + step;
else if (key == "PageUp")
newValue = current + bigStep;
else if (key == "PageDown")
newValue = current - bigStep;
else if (key == "Home")
newValue = isVertical ? stepRange.maximum() : stepRange.minimum();
else if (key == "End")
newValue = isVertical ? stepRange.minimum() : stepRange.maximum();
else
return; // Did not match any key binding.
newValue = stepRange.clampValue(newValue);
if (newValue != current) {
EventQueueScope scope;
TextFieldEventBehavior eventBehavior = DispatchInputAndChangeEvent;
setValueAsDecimal(newValue, eventBehavior, IGNORE_EXCEPTION);
if (AXObjectCache* cache = element().document().existingAXObjectCache())
cache->handleValueChanged(&element());
}
event->setDefaultHandled();
}
