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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2001 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2004, 2005, 2006, 2010 Apple Inc. All rights reserved.
* (C) 2006 Alexey Proskuryakov (ap@nypop.com)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "config.h"
#include "HTMLFieldSetElement.h"
#include "ElementChildIteratorInlines.h"
#include "GenericCachedHTMLCollection.h"
#include "HTMLFormControlsCollection.h"
#include "HTMLLegendElement.h"
#include "HTMLNames.h"
#include "HTMLObjectElement.h"
#include "NodeRareData.h"
#include "PseudoClassChangeInvalidation.h"
#include "RenderElement.h"
#include "ScriptDisallowedScope.h"
#include "TypedElementDescendantIteratorInlines.h"
#include <wtf/IsoMallocInlines.h>
#include <wtf/StdLibExtras.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(HTMLFieldSetElement);
using namespace HTMLNames;
inline HTMLFieldSetElement::HTMLFieldSetElement(const QualifiedName& tagName, Document& document, HTMLFormElement* form)
: HTMLFormControlElement(tagName, document, form)
{
ASSERT(hasTagName(fieldsetTag));
}
HTMLFieldSetElement::~HTMLFieldSetElement()
{
if (hasDisabledAttribute())
document().removeDisabledFieldsetElement();
}
Ref<HTMLFieldSetElement> HTMLFieldSetElement::create(const QualifiedName& tagName, Document& document, HTMLFormElement* form)
{
return adoptRef(*new HTMLFieldSetElement(tagName, document, form));
}
bool HTMLFieldSetElement::isDisabledFormControl() const
{
if (document().settings().sendMouseEventsToDisabledFormControlsEnabled()) {
// The fieldset element itself should never be considered disabled, it is
// only supposed to affect its descendants:
// https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#concept-fe-disabled
return false;
}
return HTMLFormControlElement::isDisabledFormControl();
}
// https://html.spec.whatwg.org/#concept-element-disabled
// https://html.spec.whatwg.org/#concept-fieldset-disabled
bool HTMLFieldSetElement::isActuallyDisabled() const
{
return HTMLFormControlElement::isDisabledFormControl();
}
static void updateFromControlElementsAncestorDisabledStateUnder(HTMLElement& startNode, bool isDisabled)
{
auto range = inclusiveDescendantsOfType<Element>(startNode);
auto it = range.begin();
// This preserves status-quo established before https://github.com/WebKit/WebKit/pull/4988:
// setDisabledByAncestorFieldset() may modify shadow DOM of <input> / <textarea> elements, but we don't care.
it.dropAssertions();
while (it != range.end()) {
if (auto* listedElement = it->asValidatedFormListedElement())
listedElement->setDisabledByAncestorFieldset(isDisabled);
// Don't call setDisabledByAncestorFieldset() on form controls inside disabled fieldsets.
if (is<HTMLFieldSetElement>(*it) && it->hasAttributeWithoutSynchronization(disabledAttr))
it.traverseNextSkippingChildren();
else
it.traverseNext();
}
}
void HTMLFieldSetElement::attributeChanged(const QualifiedName& name, const AtomString& oldValue, const AtomString& newValue, AttributeModificationReason attributeModificationReason)
{
bool oldHasDisabledAttribute = hasDisabledAttribute();
HTMLFormControlElement::attributeChanged(name, oldValue, newValue, attributeModificationReason);
if (hasDisabledAttribute() != oldHasDisabledAttribute) {
if (hasDisabledAttribute())
document().addDisabledFieldsetElement();
else
document().removeDisabledFieldsetElement();
}
}
void HTMLFieldSetElement::disabledStateChanged()
{
// This element must be updated before the style of nodes in its subtree gets recalculated.
HTMLFormControlElement::disabledStateChanged();
if (disabledByAncestorFieldset())
return;
bool thisFieldsetIsDisabled = hasAttributeWithoutSynchronization(disabledAttr);
bool hasSeenFirstLegendElement = false;
for (RefPtr<HTMLElement> control = Traversal<HTMLElement>::firstChild(*this); control; control = Traversal<HTMLElement>::nextSibling(*control)) {
if (!hasSeenFirstLegendElement && is<HTMLLegendElement>(*control)) {
hasSeenFirstLegendElement = true;
updateFromControlElementsAncestorDisabledStateUnder(*control, false /* isDisabled */);
continue;
}
updateFromControlElementsAncestorDisabledStateUnder(*control, thisFieldsetIsDisabled);
}
}
void HTMLFieldSetElement::childrenChanged(const ChildChange& change)
{
HTMLFormControlElement::childrenChanged(change);
if (!hasAttributeWithoutSynchronization(disabledAttr))
return;
RefPtr<HTMLLegendElement> legend = Traversal<HTMLLegendElement>::firstChild(*this);
if (!legend)
return;
// We only care about the first legend element (in which form controls are not disabled by this element) changing here.
updateFromControlElementsAncestorDisabledStateUnder(*legend, false /* isDisabled */);
while ((legend = Traversal<HTMLLegendElement>::nextSibling(*legend)))
updateFromControlElementsAncestorDisabledStateUnder(*legend, true);
}
void HTMLFieldSetElement::didMoveToNewDocument(Document& oldDocument, Document& newDocument)
{
ASSERT_WITH_SECURITY_IMPLICATION(&document() == &newDocument);
HTMLFormControlElement::didMoveToNewDocument(oldDocument, newDocument);
if (hasDisabledAttribute()) {
oldDocument.removeDisabledFieldsetElement();
newDocument.addDisabledFieldsetElement();
}
}
bool HTMLFieldSetElement::matchesValidPseudoClass() const
{
return m_invalidDescendants.isEmptyIgnoringNullReferences();
}
bool HTMLFieldSetElement::matchesInvalidPseudoClass() const
{
return !m_invalidDescendants.isEmptyIgnoringNullReferences();
}
bool HTMLFieldSetElement::supportsFocus() const
{
return HTMLElement::supportsFocus() && !isDisabledFormControl();
}
const AtomString& HTMLFieldSetElement::formControlType() const
{
static MainThreadNeverDestroyed<const AtomString> fieldset("fieldset"_s);
return fieldset;
}
RenderPtr<RenderElement> HTMLFieldSetElement::createElementRenderer(RenderStyle&& style, const RenderTreePosition&)
{
// Fieldsets should make a block flow if display: inline or table types are set.
return RenderElement::createFor(*this, WTFMove(style), { RenderElement::ConstructBlockLevelRendererFor::Inline, RenderElement::ConstructBlockLevelRendererFor::TableOrTablePart });
}
HTMLLegendElement* HTMLFieldSetElement::legend() const
{
return const_cast<HTMLLegendElement*>(childrenOfType<HTMLLegendElement>(*this).first());
}
Ref<HTMLCollection> HTMLFieldSetElement::elements()
{
return ensureRareData().ensureNodeLists().addCachedCollection<GenericCachedHTMLCollection<CollectionTypeTraits<CollectionType::FieldSetElements>::traversalType>>(*this, CollectionType::FieldSetElements);
}
void HTMLFieldSetElement::addInvalidDescendant(const HTMLElement& invalidFormControlElement)
{
ASSERT_WITH_MESSAGE(!is<HTMLFieldSetElement>(invalidFormControlElement), "FieldSet are never candidates for constraint validation.");
ASSERT(static_cast<const Element&>(invalidFormControlElement).matchesInvalidPseudoClass());
ASSERT_WITH_MESSAGE(!m_invalidDescendants.contains(invalidFormControlElement), "Updating the fieldset on validity change is not an efficient operation, it should only be done when necessary.");
std::optional<Style::PseudoClassChangeInvalidation> styleInvalidation;
if (m_invalidDescendants.isEmptyIgnoringNullReferences())
emplace(styleInvalidation, *this, { { CSSSelector::PseudoClassType::Valid, false }, { CSSSelector::PseudoClassType::Invalid, true } });
m_invalidDescendants.add(invalidFormControlElement);
}
void HTMLFieldSetElement::removeInvalidDescendant(const HTMLElement& formControlElement)
{
ASSERT_WITH_MESSAGE(!is<HTMLFieldSetElement>(formControlElement), "FieldSet are never candidates for constraint validation.");
ASSERT_WITH_MESSAGE(m_invalidDescendants.contains(formControlElement), "Updating the fieldset on validity change is not an efficient operation, it should only be done when necessary.");
std::optional<Style::PseudoClassChangeInvalidation> styleInvalidation;
if (m_invalidDescendants.computeSize() == 1)
emplace(styleInvalidation, *this, { { CSSSelector::PseudoClassType::Valid, true }, { CSSSelector::PseudoClassType::Invalid, false } });
m_invalidDescendants.remove(formControlElement);
}
} // namespace
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