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gecko-dev/layout/forms/nsNumberControlFrame.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsNumberControlFrame.h"
#include "mozilla/BasicEvents.h"
#include "mozilla/EventStates.h"
#include "mozilla/FloatingPoint.h"
#include "mozilla/PresShell.h"
#include "mozilla/dom/MutationEventBinding.h"
#include "HTMLInputElement.h"
#include "ICUUtils.h"
#include "nsIFocusManager.h"
#include "nsFocusManager.h"
#include "nsFontMetrics.h"
#include "nsCheckboxRadioFrame.h"
#include "nsGkAtoms.h"
#include "nsNameSpaceManager.h"
#include "nsStyleConsts.h"
#include "nsContentUtils.h"
#include "nsContentCreatorFunctions.h"
#include "nsCSSPseudoElements.h"
#include "nsThreadUtils.h"
#ifdef ACCESSIBILITY
# include "mozilla/a11y/AccTypes.h"
#endif
using namespace mozilla;
using namespace mozilla::dom;
nsIFrame* NS_NewNumberControlFrame(PresShell* aPresShell,
ComputedStyle* aStyle) {
return new (aPresShell)
nsNumberControlFrame(aStyle, aPresShell->GetPresContext());
}
NS_IMPL_FRAMEARENA_HELPERS(nsNumberControlFrame)
NS_QUERYFRAME_HEAD(nsNumberControlFrame)
NS_QUERYFRAME_ENTRY(nsNumberControlFrame)
NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
NS_QUERYFRAME_ENTRY(nsIFormControlFrame)
NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
nsNumberControlFrame::nsNumberControlFrame(ComputedStyle* aStyle,
nsPresContext* aPresContext)
: nsContainerFrame(aStyle, aPresContext, kClassID),
mHandlingInputEvent(false) {}
void nsNumberControlFrame::DestroyFrom(nsIFrame* aDestructRoot,
PostDestroyData& aPostDestroyData) {
NS_ASSERTION(
!GetPrevContinuation() && !GetNextContinuation(),
"nsNumberControlFrame should not have continuations; if it does we "
"need to call RegUnregAccessKey only for the first");
nsCheckboxRadioFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), false);
aPostDestroyData.AddAnonymousContent(mOuterWrapper.forget());
nsContainerFrame::DestroyFrom(aDestructRoot, aPostDestroyData);
}
nscoord nsNumberControlFrame::GetMinISize(gfxContext* aRenderingContext) {
nscoord result;
DISPLAY_MIN_INLINE_SIZE(this, result);
nsIFrame* kid = mFrames.FirstChild();
if (kid) { // display:none?
result = nsLayoutUtils::IntrinsicForContainer(aRenderingContext, kid,
nsLayoutUtils::MIN_ISIZE);
} else {
result = 0;
}
return result;
}
nscoord nsNumberControlFrame::GetPrefISize(gfxContext* aRenderingContext) {
nscoord result;
DISPLAY_PREF_INLINE_SIZE(this, result);
nsIFrame* kid = mFrames.FirstChild();
if (kid) { // display:none?
result = nsLayoutUtils::IntrinsicForContainer(aRenderingContext, kid,
nsLayoutUtils::PREF_ISIZE);
} else {
result = 0;
}
return result;
}
void nsNumberControlFrame::Reflow(nsPresContext* aPresContext,
ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus) {
MarkInReflow();
DO_GLOBAL_REFLOW_COUNT("nsNumberControlFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);
MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
NS_ASSERTION(mOuterWrapper, "Outer wrapper div must exist!");
NS_ASSERTION(
!GetPrevContinuation() && !GetNextContinuation(),
"nsNumberControlFrame should not have continuations; if it does we "
"need to call RegUnregAccessKey only for the first");
NS_ASSERTION(!mFrames.FirstChild() || !mFrames.FirstChild()->GetNextSibling(),
"We expect at most one direct child frame");
if (mState & NS_FRAME_FIRST_REFLOW) {
nsCheckboxRadioFrame::RegUnRegAccessKey(this, true);
}
const WritingMode myWM = aReflowInput.GetWritingMode();
// The ISize of our content box, which is the available ISize
// for our anonymous content:
const nscoord contentBoxISize = aReflowInput.ComputedISize();
nscoord contentBoxBSize = aReflowInput.ComputedBSize();
// Figure out our border-box sizes as well (by adding borderPadding to
// content-box sizes):
const nscoord borderBoxISize =
contentBoxISize +
aReflowInput.ComputedLogicalBorderPadding().IStartEnd(myWM);
nscoord borderBoxBSize;
if (contentBoxBSize != NS_INTRINSICSIZE) {
borderBoxBSize =
contentBoxBSize +
aReflowInput.ComputedLogicalBorderPadding().BStartEnd(myWM);
} // else, we'll figure out borderBoxBSize after we resolve contentBoxBSize.
nsIFrame* outerWrapperFrame = mOuterWrapper->GetPrimaryFrame();
if (!outerWrapperFrame) { // display:none?
if (contentBoxBSize == NS_INTRINSICSIZE) {
contentBoxBSize = 0;
borderBoxBSize =
aReflowInput.ComputedLogicalBorderPadding().BStartEnd(myWM);
}
} else {
NS_ASSERTION(outerWrapperFrame == mFrames.FirstChild(), "huh?");
ReflowOutput wrappersDesiredSize(aReflowInput);
WritingMode wrapperWM = outerWrapperFrame->GetWritingMode();
LogicalSize availSize = aReflowInput.ComputedSize(wrapperWM);
availSize.BSize(wrapperWM) = NS_UNCONSTRAINEDSIZE;
ReflowInput wrapperReflowInput(aPresContext, aReflowInput,
outerWrapperFrame, availSize);
// Convert wrapper margin into my own writing-mode (in case it differs):
LogicalMargin wrapperMargin =
wrapperReflowInput.ComputedLogicalMargin().ConvertTo(myWM, wrapperWM);
// offsets of wrapper frame within this frame:
LogicalPoint wrapperOffset(
myWM,
aReflowInput.ComputedLogicalBorderPadding().IStart(myWM) +
wrapperMargin.IStart(myWM),
aReflowInput.ComputedLogicalBorderPadding().BStart(myWM) +
wrapperMargin.BStart(myWM));
nsReflowStatus childStatus;
// We initially reflow the child with a dummy containerSize; positioning
// will be fixed later.
const nsSize dummyContainerSize;
ReflowChild(outerWrapperFrame, aPresContext, wrappersDesiredSize,
wrapperReflowInput, myWM, wrapperOffset, dummyContainerSize, 0,
childStatus);
MOZ_ASSERT(childStatus.IsFullyComplete(),
"We gave our child unconstrained available block-size, "
"so it should be complete");
nscoord wrappersMarginBoxBSize =
wrappersDesiredSize.BSize(myWM) + wrapperMargin.BStartEnd(myWM);
if (contentBoxBSize == NS_INTRINSICSIZE) {
// We are intrinsically sized -- we should shrinkwrap the outer wrapper's
// block-size:
contentBoxBSize = wrappersMarginBoxBSize;
// Make sure we obey min/max-bsize in the case when we're doing intrinsic
// sizing (we get it for free when we have a non-intrinsic
// aReflowInput.ComputedBSize()). Note that we do this before
// adjusting for borderpadding, since ComputedMaxBSize and
// ComputedMinBSize are content heights.
contentBoxBSize =
NS_CSS_MINMAX(contentBoxBSize, aReflowInput.ComputedMinBSize(),
aReflowInput.ComputedMaxBSize());
borderBoxBSize =
contentBoxBSize +
aReflowInput.ComputedLogicalBorderPadding().BStartEnd(myWM);
}
// Center child in block axis
nscoord extraSpace = contentBoxBSize - wrappersMarginBoxBSize;
wrapperOffset.B(myWM) += std::max(0, extraSpace / 2);
// Needed in FinishReflowChild, for logical-to-physical conversion:
nsSize borderBoxSize =
LogicalSize(myWM, borderBoxISize, borderBoxBSize).GetPhysicalSize(myWM);
// Place the child
FinishReflowChild(outerWrapperFrame, aPresContext, wrappersDesiredSize,
&wrapperReflowInput, myWM, wrapperOffset, borderBoxSize,
0);
nsSize contentBoxSize = LogicalSize(myWM, contentBoxISize, contentBoxBSize)
.GetPhysicalSize(myWM);
aDesiredSize.SetBlockStartAscent(
wrappersDesiredSize.BlockStartAscent() +
outerWrapperFrame->BStart(aReflowInput.GetWritingMode(),
contentBoxSize));
}
LogicalSize logicalDesiredSize(myWM, borderBoxISize, borderBoxBSize);
aDesiredSize.SetSize(myWM, logicalDesiredSize);
aDesiredSize.SetOverflowAreasToDesiredBounds();
if (outerWrapperFrame) {
ConsiderChildOverflow(aDesiredSize.mOverflowAreas, outerWrapperFrame);
}
FinishAndStoreOverflow(&aDesiredSize);
MOZ_ASSERT(aStatus.IsEmpty(), "This type of frame can't be split.");
NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aDesiredSize);
}
void nsNumberControlFrame::SyncDisabledState() {
EventStates eventStates = mContent->AsElement()->State();
if (eventStates.HasState(NS_EVENT_STATE_DISABLED)) {
mTextField->SetAttr(kNameSpaceID_None, nsGkAtoms::disabled, EmptyString(),
true);
} else {
mTextField->UnsetAttr(kNameSpaceID_None, nsGkAtoms::disabled, true);
}
}
nsresult nsNumberControlFrame::AttributeChanged(int32_t aNameSpaceID,
nsAtom* aAttribute,
int32_t aModType) {
// nsGkAtoms::disabled is handled by SyncDisabledState
if (aNameSpaceID == kNameSpaceID_None) {
if (aAttribute == nsGkAtoms::placeholder ||
aAttribute == nsGkAtoms::readonly ||
aAttribute == nsGkAtoms::tabindex) {
if (aModType == MutationEvent_Binding::REMOVAL) {
mTextField->UnsetAttr(aNameSpaceID, aAttribute, true);
} else {
MOZ_ASSERT(aModType == MutationEvent_Binding::ADDITION ||
aModType == MutationEvent_Binding::MODIFICATION);
nsAutoString value;
mContent->AsElement()->GetAttr(aNameSpaceID, aAttribute, value);
mTextField->SetAttr(aNameSpaceID, aAttribute, value, true);
}
}
}
return nsContainerFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
}
void nsNumberControlFrame::ContentStatesChanged(EventStates aStates) {
if (aStates.HasState(NS_EVENT_STATE_DISABLED)) {
nsContentUtils::AddScriptRunner(new SyncDisabledStateEvent(this));
}
}
nsITextControlFrame* nsNumberControlFrame::GetTextFieldFrame() {
return do_QueryFrame(GetAnonTextControl()->GetPrimaryFrame());
}
class FocusTextField : public Runnable {
public:
FocusTextField(nsIContent* aNumber, nsIContent* aTextField)
: mozilla::Runnable("FocusTextField"),
mNumber(aNumber),
mTextField(aTextField) {}
NS_IMETHOD Run() override {
if (mNumber->AsElement()->State().HasState(NS_EVENT_STATE_FOCUS)) {
// This job shouldn't be triggered by a WebIDL interface, hence the
// default options can be used.
FocusOptions options;
HTMLInputElement::FromNode(mTextField)->Focus(options, IgnoreErrors());
}
return NS_OK;
}
private:
nsCOMPtr<nsIContent> mNumber;
nsCOMPtr<nsIContent> mTextField;
};
already_AddRefed<Element> nsNumberControlFrame::MakeAnonymousElement(
Element* aParent, nsAtom* aTagName, PseudoStyleType aPseudoType) {
// Get the NodeInfoManager and tag necessary to create the anonymous divs.
Document* doc = mContent->GetComposedDoc();
RefPtr<Element> resultElement = doc->CreateHTMLElement(aTagName);
resultElement->SetPseudoElementType(aPseudoType);
if (aPseudoType == PseudoStyleType::mozNumberSpinDown ||
aPseudoType == PseudoStyleType::mozNumberSpinUp) {
resultElement->SetAttr(kNameSpaceID_None, nsGkAtoms::role,
NS_LITERAL_STRING("button"), false);
}
if (aParent) {
aParent->AppendChildTo(resultElement, false);
}
return resultElement.forget();
}
nsresult nsNumberControlFrame::CreateAnonymousContent(
nsTArray<ContentInfo>& aElements) {
// We create an anonymous tree for our input element that is structured as
// follows:
//
// input
// div - outer wrapper with "display:flex" by default
// input - text input field
// div - spin box wrapping up/down arrow buttons
// div - spin up (up arrow button)
// div - spin down (down arrow button)
//
// If you change this, be careful to change the destruction order in
// nsNumberControlFrame::DestroyFrom.
// Create the anonymous outer wrapper:
mOuterWrapper = MakeAnonymousElement(nullptr, nsGkAtoms::div,
PseudoStyleType::mozNumberWrapper);
aElements.AppendElement(mOuterWrapper);
// Create the ::-moz-number-text pseudo-element:
mTextField = MakeAnonymousElement(mOuterWrapper, nsGkAtoms::input,
PseudoStyleType::mozNumberText);
mTextField->SetAttr(kNameSpaceID_None, nsGkAtoms::type,
NS_LITERAL_STRING("text"), false);
HTMLInputElement* content = HTMLInputElement::FromNode(mContent);
HTMLInputElement* textField = HTMLInputElement::FromNode(mTextField);
// Initialize the text field value:
nsAutoString value;
content->GetValue(value, CallerType::System);
SetValueOfAnonTextControl(value);
// If we're readonly, make sure our anonymous text control is too:
nsAutoString readonly;
if (mContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::readonly,
readonly)) {
mTextField->SetAttr(kNameSpaceID_None, nsGkAtoms::readonly, readonly,
false);
}
// Propogate our tabindex:
textField->SetTabIndex(content->TabIndex(), IgnoreErrors());
// Initialize the text field's placeholder, if ours is set:
nsAutoString placeholder;
if (mContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::placeholder,
placeholder)) {
mTextField->SetAttr(kNameSpaceID_None, nsGkAtoms::placeholder, placeholder,
false);
}
if (mContent->AsElement()->State().HasState(NS_EVENT_STATE_FOCUS)) {
// We don't want to focus the frame but the text field.
RefPtr<FocusTextField> focusJob = new FocusTextField(mContent, mTextField);
nsContentUtils::AddScriptRunner(focusJob);
}
SyncDisabledState(); // Sync disabled state of 'mTextField'.
if (StyleDisplay()->mAppearance == StyleAppearance::Textfield) {
// The author has elected to hide the spinner by setting this
// -moz-appearance. We will reframe if it changes.
return NS_OK;
}
// Create the ::-moz-number-spin-box pseudo-element:
mSpinBox = MakeAnonymousElement(mOuterWrapper, nsGkAtoms::div,
PseudoStyleType::mozNumberSpinBox);
// Create the ::-moz-number-spin-up pseudo-element:
mSpinUp = MakeAnonymousElement(mSpinBox, nsGkAtoms::div,
PseudoStyleType::mozNumberSpinUp);
// Create the ::-moz-number-spin-down pseudo-element:
mSpinDown = MakeAnonymousElement(mSpinBox, nsGkAtoms::div,
PseudoStyleType::mozNumberSpinDown);
return NS_OK;
}
void nsNumberControlFrame::SetFocus(bool aOn, bool aRepaint) {
GetTextFieldFrame()->SetFocus(aOn, aRepaint);
}
nsresult nsNumberControlFrame::SetFormProperty(nsAtom* aName,
const nsAString& aValue) {
return GetTextFieldFrame()->SetFormProperty(aName, aValue);
}
HTMLInputElement* nsNumberControlFrame::GetAnonTextControl() {
return HTMLInputElement::FromNode(mTextField);
}
/* static */
nsNumberControlFrame* nsNumberControlFrame::GetNumberControlFrameForTextField(
nsIFrame* aFrame) {
// If aFrame is the anon text field for an <input type=number> then we expect
// the frame of its mContent's grandparent to be that input's frame. We
// have to check for this via the content tree because we don't know whether
// extra frames will be wrapped around any of the elements between aFrame and
// the nsNumberControlFrame that we're looking for (e.g. flex wrappers).
nsIContent* content = aFrame->GetContent();
if (content->IsInNativeAnonymousSubtree() && content->GetParent() &&
content->GetParent()->GetParent()) {
nsIContent* grandparent = content->GetParent()->GetParent();
if (grandparent->IsHTMLElement(nsGkAtoms::input) &&
grandparent->AsElement()->AttrValueIs(
kNameSpaceID_None, nsGkAtoms::type, nsGkAtoms::number,
eCaseMatters)) {
return do_QueryFrame(grandparent->GetPrimaryFrame());
}
}
return nullptr;
}
/* static */
nsNumberControlFrame* nsNumberControlFrame::GetNumberControlFrameForSpinButton(
nsIFrame* aFrame) {
// If aFrame is a spin button for an <input type=number> then we expect the
// frame of its mContent's great-grandparent to be that input's frame. We
// have to check for this via the content tree because we don't know whether
// extra frames will be wrapped around any of the elements between aFrame and
// the nsNumberControlFrame that we're looking for (e.g. flex wrappers).
nsIContent* content = aFrame->GetContent();
if (content->IsInNativeAnonymousSubtree() && content->GetParent() &&
content->GetParent()->GetParent() &&
content->GetParent()->GetParent()->GetParent()) {
nsIContent* greatgrandparent =
content->GetParent()->GetParent()->GetParent();
if (greatgrandparent->IsHTMLElement(nsGkAtoms::input) &&
greatgrandparent->AsElement()->AttrValueIs(
kNameSpaceID_None, nsGkAtoms::type, nsGkAtoms::number,
eCaseMatters)) {
return do_QueryFrame(greatgrandparent->GetPrimaryFrame());
}
}
return nullptr;
}
int32_t nsNumberControlFrame::GetSpinButtonForPointerEvent(
WidgetGUIEvent* aEvent) const {
MOZ_ASSERT(aEvent->mClass == eMouseEventClass, "Unexpected event type");
if (!mSpinBox) {
// we don't have a spinner
return eSpinButtonNone;
}
if (aEvent->mOriginalTarget == mSpinUp) {
return eSpinButtonUp;
}
if (aEvent->mOriginalTarget == mSpinDown) {
return eSpinButtonDown;
}
if (aEvent->mOriginalTarget == mSpinBox) {
// In the case that the up/down buttons are hidden (display:none) we use
// just the spin box element, spinning up if the pointer is over the top
// half of the element, or down if it's over the bottom half. This is
// important to handle since this is the state things are in for the
// default UA style sheet. See the comment in forms.css for why.
LayoutDeviceIntPoint absPoint = aEvent->mRefPoint;
nsPoint point = nsLayoutUtils::GetEventCoordinatesRelativeTo(
aEvent, absPoint, mSpinBox->GetPrimaryFrame());
if (point != nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE)) {
if (point.y < mSpinBox->GetPrimaryFrame()->GetSize().height / 2) {
return eSpinButtonUp;
}
return eSpinButtonDown;
}
}
return eSpinButtonNone;
}
void nsNumberControlFrame::SpinnerStateChanged() const {
MOZ_ASSERT(mSpinUp && mSpinDown,
"We should not be called when we have no spinner");
nsIFrame* spinUpFrame = mSpinUp->GetPrimaryFrame();
if (spinUpFrame && spinUpFrame->IsThemed()) {
spinUpFrame->InvalidateFrame();
}
nsIFrame* spinDownFrame = mSpinDown->GetPrimaryFrame();
if (spinDownFrame && spinDownFrame->IsThemed()) {
spinDownFrame->InvalidateFrame();
}
}
bool nsNumberControlFrame::SpinnerUpButtonIsDepressed() const {
return HTMLInputElement::FromNode(mContent)
->NumberSpinnerUpButtonIsDepressed();
}
bool nsNumberControlFrame::SpinnerDownButtonIsDepressed() const {
return HTMLInputElement::FromNode(mContent)
->NumberSpinnerDownButtonIsDepressed();
}
bool nsNumberControlFrame::IsFocused() const {
// Normally this depends on the state of our anonymous text control (which
// takes focus for us), but in the case that it does not have a frame we will
// have focus ourself.
return mTextField->State().HasState(NS_EVENT_STATE_FOCUS) ||
mContent->AsElement()->State().HasState(NS_EVENT_STATE_FOCUS);
}
void nsNumberControlFrame::HandleFocusEvent(WidgetEvent* aEvent) {
if (aEvent->mOriginalTarget != mTextField) {
// Move focus to our text field
RefPtr<HTMLInputElement> textField = HTMLInputElement::FromNode(mTextField);
// Use default FocusOptions, because this method isn't supposed to be called
// from a WebIDL interface.
FocusOptions options;
textField->Focus(options, IgnoreErrors());
}
}
void nsNumberControlFrame::HandleSelectCall() {
RefPtr<HTMLInputElement> textField = HTMLInputElement::FromNode(mTextField);
textField->Select();
}
#define STYLES_DISABLING_NATIVE_THEMING \
NS_AUTHOR_SPECIFIED_BACKGROUND | NS_AUTHOR_SPECIFIED_PADDING | \
NS_AUTHOR_SPECIFIED_BORDER
bool nsNumberControlFrame::ShouldUseNativeStyleForSpinner() const {
MOZ_ASSERT(mSpinUp && mSpinDown,
"We should not be called when we have no spinner");
nsIFrame* spinUpFrame = mSpinUp->GetPrimaryFrame();
nsIFrame* spinDownFrame = mSpinDown->GetPrimaryFrame();
return spinUpFrame &&
spinUpFrame->StyleDisplay()->mAppearance ==
StyleAppearance::SpinnerUpbutton &&
!PresContext()->HasAuthorSpecifiedRules(
spinUpFrame, STYLES_DISABLING_NATIVE_THEMING) &&
spinDownFrame &&
spinDownFrame->StyleDisplay()->mAppearance ==
StyleAppearance::SpinnerDownbutton &&
!PresContext()->HasAuthorSpecifiedRules(
spinDownFrame, STYLES_DISABLING_NATIVE_THEMING);
}
void nsNumberControlFrame::AppendAnonymousContentTo(
nsTArray<nsIContent*>& aElements, uint32_t aFilter) {
// Only one direct anonymous child:
if (mOuterWrapper) {
aElements.AppendElement(mOuterWrapper);
}
}
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);
// 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);
}
// 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.
//
// Pass NonSystem as the caller type; this should work fine for actual number
// inputs, and be safe in case our input has a type we don't expect for some
// reason.
HTMLInputElement::FromNode(mTextField)
->SetValue(localizedValue, CallerType::NonSystem, IgnoreErrors());
}
void nsNumberControlFrame::GetValueOfAnonTextControl(nsAString& aValue) {
if (!mTextField) {
aValue.Truncate();
return;
}
HTMLInputElement::FromNode(mTextField)->GetValue(aValue, CallerType::System);
// Here we need to de-localize any number typed in by the user. That is, we
// need to convert it from the number format of the user's language, region,
// etc. to the format that the HTML 5 spec defines to be a "valid
// floating-point number":
//
// http://www.whatwg.org/specs/web-apps/current-work/multipage/common-microsyntaxes.html#floating-point-numbers
//
// This is necessary to allow the number that we return to be parsed by
// functions like HTMLInputElement::StringToDecimal (the HTML-5-conforming
// parsing function) which don't know how to handle numbers that are
// formatted differently (for example, with non-ASCII digits, with grouping
// separator characters or with a decimal separator character other than
// '.').
ICUUtils::LanguageTagIterForContent langTagIter(mContent);
double value = ICUUtils::ParseNumber(aValue, langTagIter);
if (!IsFinite(value)) {
aValue.Truncate();
return;
}
if (value == HTMLInputElement::StringToDecimal(aValue).toDouble()) {
// We want to preserve the formatting of the number as typed in by the user
// whenever possible. Since the localized serialization parses to the same
// number as the de-localized serialization, we can do that. This helps
// prevent normalization of input such as "2e2" (which would otherwise be
// converted to "200"). Content relies on this.
//
// Typically we will only get here for locales in which numbers are
// formatted in the same way as they are for HTML5's "valid floating-point
// number" format.
return;
}
// We can't preserve the formatting, otherwise functions such as
// HTMLInputElement::StringToDecimal would incorrectly process the number
// input by the user. For example, "12.345" with lang=de de-localizes as
// 12345, but HTMLInputElement::StringToDecimal would mistakenly parse it as
// 12.345. Another example would be "12,345" with lang=de which de-localizes
// as 12.345, but HTMLInputElement::StringToDecimal would parse it to NaN.
aValue.Truncate();
aValue.AppendFloat(value);
}
bool nsNumberControlFrame::AnonTextControlIsEmpty() {
if (!mTextField) {
return true;
}
nsAutoString value;
HTMLInputElement::FromNode(mTextField)->GetValue(value, CallerType::System);
return value.IsEmpty();
}
#ifdef ACCESSIBILITY
a11y::AccType nsNumberControlFrame::AccessibleType() {
return a11y::eHTMLSpinnerType;
}
#endif
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