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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 "ElementIterator.h"
#include "HTMLFormControlsCollection.h"
#include "HTMLLegendElement.h"
#include "HTMLNames.h"
#include "HTMLObjectElement.h"
#include "NodeRareData.h"
#include "RenderFieldset.h"
#include <wtf/StdLibExtras.h>
namespace WebCore {
using namespace HTMLNames;
inline HTMLFieldSetElement::HTMLFieldSetElement(const QualifiedName& tagName, Document& document, HTMLFormElement* form)
: HTMLFormControlElement(tagName, document, form)
, m_documentVersion(0)
{
ASSERT(hasTagName(fieldsetTag));
}
HTMLFieldSetElement::~HTMLFieldSetElement()
{
if (fastHasAttribute(disabledAttr))
document().removeDisabledFieldsetElement();
}
Ref<HTMLFieldSetElement> HTMLFieldSetElement::create(const QualifiedName& tagName, Document& document, HTMLFormElement* form)
{
return adoptRef(*new HTMLFieldSetElement(tagName, document, form));
}
static void updateFromControlElementsAncestorDisabledStateUnder(HTMLElement& startNode, bool isDisabled)
{
HTMLFormControlElement* control;
if (is<HTMLFormControlElement>(startNode))
control = &downcast<HTMLFormControlElement>(startNode);
else
control = Traversal<HTMLFormControlElement>::firstWithin(startNode);
while (control) {
control->setAncestorDisabled(isDisabled);
// Don't call setAncestorDisabled(false) on form contorls inside disabled fieldsets.
if (is<HTMLFieldSetElement>(*control) && control->fastHasAttribute(disabledAttr))
control = Traversal<HTMLFormControlElement>::nextSkippingChildren(*control, &startNode);
else
control = Traversal<HTMLFormControlElement>::next(*control, &startNode);
}
}
void HTMLFieldSetElement::disabledAttributeChanged()
{
if (fastHasAttribute(disabledAttr))
document().addDisabledFieldsetElement();
else
document().removeDisabledFieldsetElement();
HTMLFormControlElement::disabledAttributeChanged();
}
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 = fastHasAttribute(disabledAttr);
bool hasSeenFirstLegendElement = false;
for (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 (!fastHasAttribute(disabledAttr))
return;
HTMLLegendElement* legend = Traversal<HTMLLegendElement>::firstChild(*this);
if (!legend)
return;
// We only care about the first legend element (in which form contorls 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)
{
HTMLFormControlElement::didMoveToNewDocument(oldDocument);
if (fastHasAttribute(disabledAttr)) {
if (oldDocument)
oldDocument->removeDisabledFieldsetElement();
document().addDisabledFieldsetElement();
}
}
bool HTMLFieldSetElement::matchesValidPseudoClass() const
{
return m_invalidDescendants.isEmpty();
}
bool HTMLFieldSetElement::matchesInvalidPseudoClass() const
{
return !m_invalidDescendants.isEmpty();
}
bool HTMLFieldSetElement::supportsFocus() const
{
return HTMLElement::supportsFocus();
}
const AtomicString& HTMLFieldSetElement::formControlType() const
{
static NeverDestroyed<const AtomicString> fieldset("fieldset", AtomicString::ConstructFromLiteral);
return fieldset;
}
RenderPtr<RenderElement> HTMLFieldSetElement::createElementRenderer(Ref<RenderStyle>&& style, const RenderTreePosition&)
{
return createRenderer<RenderFieldset>(*this, WTFMove(style));
}
HTMLLegendElement* HTMLFieldSetElement::legend() const
{
return const_cast<HTMLLegendElement*>(childrenOfType<HTMLLegendElement>(*this).first());
}
Ref<HTMLFormControlsCollection> HTMLFieldSetElement::elements()
{
return ensureRareData().ensureNodeLists().addCachedCollection<HTMLFormControlsCollection>(*this, FormControls);
}
Ref<HTMLCollection> HTMLFieldSetElement::elementsForNativeBindings()
{
return elements();
}
void HTMLFieldSetElement::refreshElementsIfNeeded() const
{
uint64_t documentVersion = document().domTreeVersion();
if (m_documentVersion == documentVersion)
return;
m_documentVersion = documentVersion;
m_associatedElements.clear();
for (auto& element : descendantsOfType<Element>(const_cast<HTMLFieldSetElement&>(*this))) {
if (element.hasTagName(objectTag))
m_associatedElements.append(&downcast<HTMLObjectElement>(element));
else if (is<HTMLFormControlElement>(element))
m_associatedElements.append(&downcast<HTMLFormControlElement>(element));
}
}
const Vector<FormAssociatedElement*>& HTMLFieldSetElement::associatedElements() const
{
refreshElementsIfNeeded();
return m_associatedElements;
}
unsigned HTMLFieldSetElement::length() const
{
refreshElementsIfNeeded();
unsigned length = 0;
for (auto& element : m_associatedElements) {
if (element->isEnumeratable())
++length;
}
return length;
}
void HTMLFieldSetElement::addInvalidDescendant(const HTMLFormControlElement& 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.");
if (m_invalidDescendants.isEmpty())
setNeedsStyleRecalc();
m_invalidDescendants.add(&invalidFormControlElement);
}
void HTMLFieldSetElement::removeInvalidDescendant(const HTMLFormControlElement& 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.");
m_invalidDescendants.remove(&formControlElement);
if (m_invalidDescendants.isEmpty())
setNeedsStyleRecalc();
}
} // namespace
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