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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2003, 2004, 2005, 2006, 2007, 2010, 2011, 2012 Apple Inc. All rights reserved.
*
* 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 "HTMLFormControlsCollection.h"
#include "FormAssociatedElement.h"
#include "HTMLFormElement.h"
#include "HTMLImageElement.h"
#include "HTMLNames.h"
#include "ScriptDisallowedScope.h"
#include <wtf/IsoMallocInlines.h>
namespace WebCore {
using namespace HTMLNames;
// Since the collections are to be "live", we have to do the
// calculation every time if anything has changed.
WTF_MAKE_ISO_ALLOCATED_IMPL(HTMLFormControlsCollection);
HTMLFormControlsCollection::HTMLFormControlsCollection(ContainerNode& ownerNode)
: CachedHTMLCollection(ownerNode, FormControls)
, m_cachedElement(nullptr)
, m_cachedElementOffsetInArray(0)
{
ASSERT(is<HTMLFormElement>(ownerNode));
}
Ref<HTMLFormControlsCollection> HTMLFormControlsCollection::create(ContainerNode& ownerNode, CollectionType)
{
return adoptRef(*new HTMLFormControlsCollection(ownerNode));
}
HTMLFormControlsCollection::~HTMLFormControlsCollection() = default;
std::optional<std::variant<RefPtr<RadioNodeList>, RefPtr<Element>>> HTMLFormControlsCollection::namedItemOrItems(const AtomString& name) const
{
auto namedItems = this->namedItems(name);
if (namedItems.isEmpty())
return std::nullopt;
if (namedItems.size() == 1)
return std::variant<RefPtr<RadioNodeList>, RefPtr<Element>> { RefPtr<Element> { WTFMove(namedItems[0]) } };
return std::variant<RefPtr<RadioNodeList>, RefPtr<Element>> { RefPtr<RadioNodeList> { ownerNode().radioNodeList(name) } };
}
static unsigned findFormAssociatedElement(const Vector<WeakPtr<HTMLElement>>& elements, const Element& element)
{
for (unsigned i = 0; i < elements.size(); ++i) {
RefPtr currentElement = elements[i].get();
ASSERT(currentElement);
auto* associatedElement = currentElement->asFormAssociatedElement();
ASSERT(associatedElement);
if (associatedElement->isEnumeratable() && currentElement == &element)
return i;
}
return elements.size();
}
HTMLElement* HTMLFormControlsCollection::customElementAfter(Element* current) const
{
ScriptDisallowedScope::InMainThread scriptDisallowedScope;
auto& elements = ownerNode().unsafeAssociatedElements();
unsigned start;
if (!current)
start = 0;
else if (m_cachedElement == current)
start = m_cachedElementOffsetInArray + 1;
else
start = findFormAssociatedElement(elements, *current) + 1;
for (unsigned i = start; i < elements.size(); ++i) {
RefPtr element = elements[i].get();
ASSERT(element);
ASSERT(element->asFormAssociatedElement());
if (element->asFormAssociatedElement()->isEnumeratable()) {
m_cachedElement = element.get();
m_cachedElementOffsetInArray = i;
return element.get();
}
}
return nullptr;
}
HTMLFormElement& HTMLFormControlsCollection::ownerNode() const
{
return downcast<HTMLFormElement>(CachedHTMLCollection::ownerNode());
}
void HTMLFormControlsCollection::updateNamedElementCache() const
{
if (hasNamedElementCache())
return;
auto cache = makeUnique<CollectionNamedElementCache>();
HashSet<AtomStringImpl*> foundInputElements;
ScriptDisallowedScope::InMainThread scriptDisallowedScope;
for (auto& weakElement : ownerNode().unsafeAssociatedElements()) {
RefPtr element { weakElement.get() };
ASSERT(element);
auto* associatedElement = element->asFormAssociatedElement();
ASSERT(associatedElement);
if (associatedElement->isEnumeratable()) {
const AtomString& id = element->getIdAttribute();
if (!id.isEmpty()) {
cache->appendToIdCache(id, *element);
foundInputElements.add(id.impl());
}
const AtomString& name = element->getNameAttribute();
if (!name.isEmpty() && id != name) {
cache->appendToNameCache(name, *element);
foundInputElements.add(name.impl());
}
}
}
for (auto& elementPtr : ownerNode().imageElements()) {
if (!elementPtr)
continue;
HTMLImageElement& element = *elementPtr;
const AtomString& id = element.getIdAttribute();
if (!id.isEmpty() && !foundInputElements.contains(id.impl()))
cache->appendToIdCache(id, element);
const AtomString& name = element.getNameAttribute();
if (!name.isEmpty() && id != name && !foundInputElements.contains(name.impl()))
cache->appendToNameCache(name, element);
}
setNamedItemCache(WTFMove(cache));
}
void HTMLFormControlsCollection::invalidateCacheForDocument(Document& document)
{
CachedHTMLCollection::invalidateCacheForDocument(document);
m_cachedElement = nullptr;
m_cachedElementOffsetInArray = 0;
}
}