Source/WebCore/html/HTMLSelectedContentElement.cpp

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#include "config.h"
#include "HTMLSelectedContentElement.h"

#include "ElementAncestorIteratorInlines.h"
#include "HTMLElement.h"
#include "HTMLNames.h"
#include "HTMLOptionElement.h"
#include "HTMLSelectElement.h"
#include "Settings.h"
#include <wtf/TZoneMallocInlines.h>

namespace WebCore {

WTF_MAKE_TZONE_ALLOCATED_IMPL(HTMLSelectedContentElement);

using namespace HTMLNames;

HTMLSelectedContentElement::HTMLSelectedContentElement(const QualifiedName& tagName, Document& document)
    : HTMLElement(tagName, document, { })
{
    ASSERT(hasTagName(selectedcontentTag));
}

Ref<HTMLSelectedContentElement> HTMLSelectedContentElement::create(const QualifiedName& tagName, Document& document)
{
    return adoptRef(*new HTMLSelectedContentElement(tagName, document));
}

auto HTMLSelectedContentElement::insertionSteps(InsertionType insertionType, ContainerNode& parentOfInsertedTree) -> NeedsPostConnectionSteps
{
    HTMLElement::insertionSteps(insertionType, parentOfInsertedTree);

    ASSERT(document().settings().htmlEnhancedSelectParsingEnabled());
    ASSERT(document().settings().htmlEnhancedSelectEnabled());
    ASSERT(!document().settings().mutationEventsEnabled());

    if (insertionType.connectedToDocument)
        return NeedsPostConnectionSteps::Yes;
    return NeedsPostConnectionSteps::No;
}

void HTMLSelectedContentElement::postConnectionSteps()
{
    RefPtr<HTMLSelectElement> nearestAncestorSelect;
    m_isDisabled = false;
    for (Ref ancestor : ancestorsOfType<HTMLElement>(*this)) {
        if (auto* select = dynamicDowncast<HTMLSelectElement>(ancestor.get())) {
            if (!nearestAncestorSelect) {
                nearestAncestorSelect = select;
                continue;
            }
            m_isDisabled = true;
            break;
        }
        if (isAnyOf<HTMLOptionElement, HTMLSelectedContentElement>(ancestor)) {
            m_isDisabled = true;
            break;
        }
    }
    if (m_isDisabled || !nearestAncestorSelect || nearestAncestorSelect->multiple())
        return;

    if (m_owningSelect != nearestAncestorSelect) {
        if (auto* oldSelect = m_owningSelect.get())
            oldSelect->unregisterSelectedContentElement();
        m_owningSelect = nearestAncestorSelect;
        nearestAncestorSelect->registerSelectedContentElement();
    }
    nearestAncestorSelect->updateSelectedContent();
}

void HTMLSelectedContentElement::removingSteps(RemovalType removalType, ContainerNode& oldParentOfRemovedTree)
{
    HTMLElement::removingSteps(removalType, oldParentOfRemovedTree);

    if (RefPtr select = m_owningSelect; select && !isInclusiveDescendantOf(*select)) {
        select->unregisterSelectedContentElement();
        m_owningSelect = nullptr;
    }
}

} // namespace WebCore