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c27a2129fd
Add a RAII helper to notify of multiple state changes together for these. The UpdateState CustomElementInternals calls that are getting removed are unnecessary (the state should be up-to-date by then, there's nothing changing there particularly). Same for the call in nsGenericHTMLFormElement::UnbindFromTree. ClearForm already does an state update. Differential Revision: https://phabricator.services.mozilla.com/D187033
314 lines
11 KiB
C++
314 lines
11 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/BasicEvents.h"
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#include "mozilla/EventDispatcher.h"
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#include "mozilla/Maybe.h"
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#include "mozilla/StaticPrefs_dom.h"
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#include "mozilla/dom/CustomElementRegistry.h"
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#include "mozilla/dom/HTMLFieldSetElement.h"
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#include "mozilla/dom/HTMLFieldSetElementBinding.h"
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#include "nsContentList.h"
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#include "nsQueryObject.h"
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NS_IMPL_NS_NEW_HTML_ELEMENT(FieldSet)
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namespace mozilla::dom {
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HTMLFieldSetElement::HTMLFieldSetElement(
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already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
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: nsGenericHTMLFormControlElement(std::move(aNodeInfo),
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FormControlType::Fieldset),
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mElements(nullptr),
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mFirstLegend(nullptr),
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mInvalidElementsCount(0) {
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// <fieldset> is always barred from constraint validation.
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SetBarredFromConstraintValidation(true);
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// We start out enabled and valid.
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AddStatesSilently(ElementState::ENABLED | ElementState::VALID);
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}
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HTMLFieldSetElement::~HTMLFieldSetElement() {
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uint32_t length = mDependentElements.Length();
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for (uint32_t i = 0; i < length; ++i) {
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mDependentElements[i]->ForgetFieldSet(this);
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}
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}
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NS_IMPL_CYCLE_COLLECTION_INHERITED(HTMLFieldSetElement,
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nsGenericHTMLFormControlElement, mValidity,
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mElements)
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NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED(HTMLFieldSetElement,
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nsGenericHTMLFormControlElement,
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nsIConstraintValidation)
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NS_IMPL_ELEMENT_CLONE(HTMLFieldSetElement)
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bool HTMLFieldSetElement::IsDisabledForEvents(WidgetEvent* aEvent) {
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if (StaticPrefs::dom_forms_fieldset_disable_only_descendants_enabled()) {
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return false;
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}
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return IsElementDisabledForEvents(aEvent, nullptr);
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}
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// nsIContent
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void HTMLFieldSetElement::GetEventTargetParent(EventChainPreVisitor& aVisitor) {
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// Do not process any DOM events if the element is disabled.
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aVisitor.mCanHandle = false;
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if (IsDisabledForEvents(aVisitor.mEvent)) {
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return;
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}
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nsGenericHTMLFormControlElement::GetEventTargetParent(aVisitor);
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}
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void HTMLFieldSetElement::AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName,
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const nsAttrValue* aValue,
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const nsAttrValue* aOldValue,
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nsIPrincipal* aSubjectPrincipal,
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bool aNotify) {
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if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::disabled) {
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// This *has* to be called *before* calling FieldSetDisabledChanged on our
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// controls, as they may depend on our disabled state.
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UpdateDisabledState(aNotify);
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}
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return nsGenericHTMLFormControlElement::AfterSetAttr(
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aNameSpaceID, aName, aValue, aOldValue, aSubjectPrincipal, aNotify);
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}
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void HTMLFieldSetElement::GetType(nsAString& aType) const {
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aType.AssignLiteral("fieldset");
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}
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/* static */
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bool HTMLFieldSetElement::MatchListedElements(Element* aElement,
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int32_t aNamespaceID,
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nsAtom* aAtom, void* aData) {
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nsCOMPtr<nsIFormControl> formControl = do_QueryInterface(aElement);
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return formControl;
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}
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nsIHTMLCollection* HTMLFieldSetElement::Elements() {
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if (!mElements) {
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mElements =
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new nsContentList(this, MatchListedElements, nullptr, nullptr, true);
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}
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return mElements;
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}
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// nsIFormControl
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nsresult HTMLFieldSetElement::Reset() { return NS_OK; }
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void HTMLFieldSetElement::InsertChildBefore(nsIContent* aChild,
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nsIContent* aBeforeThis,
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bool aNotify, ErrorResult& aRv) {
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bool firstLegendHasChanged = false;
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if (aChild->IsHTMLElement(nsGkAtoms::legend)) {
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if (!mFirstLegend) {
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mFirstLegend = aChild;
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// We do not want to notify the first time mFirstElement is set.
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} else {
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// If mFirstLegend is before aIndex, we do not change it.
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// Otherwise, mFirstLegend is now aChild.
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const Maybe<uint32_t> indexOfRef =
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aBeforeThis ? ComputeIndexOf(aBeforeThis) : Some(GetChildCount());
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const Maybe<uint32_t> indexOfFirstLegend = ComputeIndexOf(mFirstLegend);
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if ((indexOfRef.isSome() && indexOfFirstLegend.isSome() &&
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*indexOfRef <= *indexOfFirstLegend) ||
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// XXX Keep the odd traditional behavior for now.
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indexOfRef.isNothing()) {
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mFirstLegend = aChild;
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firstLegendHasChanged = true;
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}
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}
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}
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nsGenericHTMLFormControlElement::InsertChildBefore(aChild, aBeforeThis,
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aNotify, aRv);
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if (aRv.Failed()) {
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return;
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}
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if (firstLegendHasChanged) {
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NotifyElementsForFirstLegendChange(aNotify);
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}
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}
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void HTMLFieldSetElement::RemoveChildNode(nsIContent* aKid, bool aNotify) {
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bool firstLegendHasChanged = false;
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if (mFirstLegend && aKid == mFirstLegend) {
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// If we are removing the first legend we have to found another one.
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nsIContent* child = mFirstLegend->GetNextSibling();
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mFirstLegend = nullptr;
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firstLegendHasChanged = true;
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for (; child; child = child->GetNextSibling()) {
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if (child->IsHTMLElement(nsGkAtoms::legend)) {
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mFirstLegend = child;
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break;
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}
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}
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}
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nsGenericHTMLFormControlElement::RemoveChildNode(aKid, aNotify);
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if (firstLegendHasChanged) {
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NotifyElementsForFirstLegendChange(aNotify);
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}
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}
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void HTMLFieldSetElement::AddElement(nsGenericHTMLFormElement* aElement) {
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mDependentElements.AppendElement(aElement);
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// If the element that we are adding aElement is a fieldset, then all the
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// invalid elements in aElement are also invalid elements of this.
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HTMLFieldSetElement* fieldSet = FromNode(aElement);
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if (fieldSet) {
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for (int32_t i = 0; i < fieldSet->mInvalidElementsCount; i++) {
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UpdateValidity(false);
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}
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return;
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}
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// If the element is a form-associated custom element, adding element might be
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// caused by FACE upgrade which won't trigger mutation observer, so mark
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// mElements dirty manually here.
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CustomElementData* data = aElement->GetCustomElementData();
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if (data && data->IsFormAssociated() && mElements) {
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mElements->SetDirty();
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}
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// We need to update the validity of the fieldset.
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nsCOMPtr<nsIConstraintValidation> cvElmt = do_QueryObject(aElement);
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if (cvElmt && cvElmt->IsCandidateForConstraintValidation() &&
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!cvElmt->IsValid()) {
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UpdateValidity(false);
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}
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#if DEBUG
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int32_t debugInvalidElementsCount = 0;
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for (uint32_t i = 0; i < mDependentElements.Length(); i++) {
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HTMLFieldSetElement* fieldSet = FromNode(mDependentElements[i]);
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if (fieldSet) {
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debugInvalidElementsCount += fieldSet->mInvalidElementsCount;
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continue;
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}
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nsCOMPtr<nsIConstraintValidation> cvElmt =
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do_QueryObject(mDependentElements[i]);
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if (cvElmt && cvElmt->IsCandidateForConstraintValidation() &&
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!(cvElmt->IsValid())) {
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debugInvalidElementsCount += 1;
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}
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}
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MOZ_ASSERT(debugInvalidElementsCount == mInvalidElementsCount);
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#endif
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}
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void HTMLFieldSetElement::RemoveElement(nsGenericHTMLFormElement* aElement) {
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mDependentElements.RemoveElement(aElement);
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// If the element that we are removing aElement is a fieldset, then all the
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// invalid elements in aElement are also removed from this.
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HTMLFieldSetElement* fieldSet = FromNode(aElement);
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if (fieldSet) {
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for (int32_t i = 0; i < fieldSet->mInvalidElementsCount; i++) {
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UpdateValidity(true);
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}
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return;
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}
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// We need to update the validity of the fieldset.
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nsCOMPtr<nsIConstraintValidation> cvElmt = do_QueryObject(aElement);
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if (cvElmt && cvElmt->IsCandidateForConstraintValidation() &&
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!cvElmt->IsValid()) {
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UpdateValidity(true);
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}
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#if DEBUG
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int32_t debugInvalidElementsCount = 0;
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for (uint32_t i = 0; i < mDependentElements.Length(); i++) {
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HTMLFieldSetElement* fieldSet = FromNode(mDependentElements[i]);
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if (fieldSet) {
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debugInvalidElementsCount += fieldSet->mInvalidElementsCount;
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continue;
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}
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nsCOMPtr<nsIConstraintValidation> cvElmt =
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do_QueryObject(mDependentElements[i]);
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if (cvElmt && cvElmt->IsCandidateForConstraintValidation() &&
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!(cvElmt->IsValid())) {
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debugInvalidElementsCount += 1;
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}
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}
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MOZ_ASSERT(debugInvalidElementsCount == mInvalidElementsCount);
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#endif
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}
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void HTMLFieldSetElement::UpdateDisabledState(bool aNotify) {
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nsGenericHTMLFormControlElement::UpdateDisabledState(aNotify);
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for (nsGenericHTMLFormElement* element : mDependentElements) {
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element->FieldSetDisabledChanged(aNotify);
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}
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}
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void HTMLFieldSetElement::NotifyElementsForFirstLegendChange(bool aNotify) {
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/**
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* NOTE: this could be optimized if only call when the fieldset is currently
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* disabled.
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* This should also make sure that mElements is set when we happen to be here.
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* However, this method shouldn't be called very often in normal use cases.
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*/
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if (!mElements) {
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mElements =
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new nsContentList(this, MatchListedElements, nullptr, nullptr, true);
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}
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uint32_t length = mElements->Length(true);
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for (uint32_t i = 0; i < length; ++i) {
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static_cast<nsGenericHTMLFormElement*>(mElements->Item(i))
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->FieldSetFirstLegendChanged(aNotify);
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}
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}
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void HTMLFieldSetElement::UpdateValidity(bool aElementValidity) {
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if (aElementValidity) {
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--mInvalidElementsCount;
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} else {
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++mInvalidElementsCount;
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}
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MOZ_ASSERT(mInvalidElementsCount >= 0);
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// The fieldset validity has just changed if:
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// - there are no more invalid elements ;
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// - or there is one invalid elmement and an element just became invalid.
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if (!mInvalidElementsCount ||
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(mInvalidElementsCount == 1 && !aElementValidity)) {
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AutoStateChangeNotifier notifier(*this, true);
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RemoveStatesSilently(ElementState::VALID | ElementState::INVALID);
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AddStatesSilently(mInvalidElementsCount ? ElementState::INVALID
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: ElementState::VALID);
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}
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// We should propagate the change to the fieldset parent chain.
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if (mFieldSet) {
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mFieldSet->UpdateValidity(aElementValidity);
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}
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}
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JSObject* HTMLFieldSetElement::WrapNode(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) {
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return HTMLFieldSetElement_Binding::Wrap(aCx, this, aGivenProto);
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}
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} // namespace mozilla::dom
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